Wednesday, November 10, 2021

Nuclear Is Hot, for the Moment

The United States, Russia, and France now describe the once-neglected technology as a key part of their decarbonization plans.

By Robinson Meyer
THE ATLANTIC
When the Watts Bar Nuclear Plant Unit 2 in Tennessee opened in 2016, it was the first new U.S. nuclear reactor to come online since 1996. 
(Shawn Poynter / The New York Times / Redux)

This is an excerpt from The Atlantic’s climate newsletter, The Weekly Planet. 

For years, the nuclear-power industry has had a complaint: Why does nobody love us?

Nuclear has been, after all, the Atlas of carbon-free energy production, keeping the world hefted on its shoulders, year after year, with thousands of megawatt-hours of electricity that required burning no fossil fuels. Even today, nuclear plants generate more zero-carbon power worldwide than wind and solar do combined.

And yet it has been (as the complaint goes) ignored, hated, marginalized. Traditional environmentalists have trashed it, opposing new construction and warning of catastrophic accidents. As recently as 2017, the Sierra Club’s Nuclear Free campaign warned that nuclear energy had a “big carbon footprint” because fossil fuels are used to mine uranium for fuel rods—even though the same criticism could be made of the fuels used to mine lithium, silicon, and other minerals in renewables. This gaslighting aggravated nuclear advocates and turned them into the professional contrarians of the energy world. Nuclear could save the world, they muttered, if anyone would give us the chance.

How did they escape their funk? As with so many other problems in life, the answer is that they just had to keep doing the work, and wait.

Over the past few months, nuclear has become an unmistakable part of the world’s decarbonization strategy as formulated by both the right and the left. Nuclear is a part of the decarbonization plans released by the United States, the United Kingdom, and China, and it seems likely to play an even bigger role in poorer countries that want to maintain heavy industry. A number of bets placed during the past decade are coming to fruition. Nuclear is enjoying—well, not love, perhaps, and not even adoration, but at least a grudging affection.

“It’s being treated on more and more of an equal footing, I think it’s fair to say,” Jackie Toth, the senior advocacy director at the Good Energy Collective, a progressive pro-nuclear organization, told me. “Is it a revival or make-or-break moment? It’s a bit of both.”

Nuclear’s new glow can be seen at the Conference of the Parties, the ongoing United Nations climate conference in Glasgow, Scotland. Its presence alone is noteworthy: “At COP25, I was warned not to even attend,” Rafael Mariano Grossi, the International Atomic Energy Agency’s director-general, told Bloomberg. This year, representatives from the United States, Russia, and Brazil all described nuclear energy as a major part of their decarbonization strategy at the event.

Indeed, the Biden administration has turned America’s cohort of “advanced nuclear” start-ups and their smaller and (hopefully) safer reactors into a facet of its climate diplomacy. At COP last week, the United States and Romania announced a partnership that will see the American start-up NuScale, which makes modular reactors that can be produced in a factory, install five of them into retired coal plants in Romania and help the country, where roughly one-seventh of electricity comes from coal, phase out its coal plants by 2032. The reactors will eliminate 45 million tons of carbon dioxide a year, according to Third Way, a centrist U.S. advocacy group that praised the deal.

“We are very bullish on these advanced nuclear reactors,” Jennifer Granholm, the U.S. secretary of energy, told Yahoo News. “We have, in fact, invested a lot of money in the research and development of those.”

Over the past few years, the climate movement, too, has warmed to nuclear power. In 2018, the Union of Concerned Scientists, which was originally founded as a nuclear-safety watchdog (the eponymous concerned scientists were nuclear scientists!), reported that more than a third of the U.S. nuclear fleet was slated to close early. If closed, those plants would likely be replaced with coal and natural gas, the scientists warned.

American politicians of both parties are now sufficiently open to nuclear that they have begun to support it with huge infusions of cash. The Trump administration’s Department of Energy was so excited about advanced nuclear that it made a fake dating app to promote it. (“So … it’s been a while since nuclear has put itself out there,” its announcement post began.) The bipartisan infrastructure bill that the House of Representatives passed last week boasts more than $8.47 billion for existing nuclear plants (including a new subsidy to help keep them alive into the mid-2020s) and advanced-nuclear demonstration projects. Joe Biden’s signature spending package, the Build Back Better Act, contains a separate new production tax credit for nuclear plants.

This isn’t happening only in the United States. China is planning 150 new reactors in the next 15 years. French President Emmanuel Macron announced today that France will “relaunch the construction of nuclear reactors” for the first time in decades. As Bloomberg News reports, that’s more reactors than the entire world has built since 1986. And the European “green taxonomy,” a lengthy regulation that specifies what forms of energy investment qualify as “green” according to the European Union, is expected to list nuclear as climate-friendly.

At the same time, some of those American nuclear-energy start-ups are beginning the slow work of going to market. Two companies, TerraPower and X-energy, have submitted plans to the U.S. Nuclear Regulatory Commission. TerraPower, a Washington State–based company founded and chaired by Bill Gates, uses uranium fuel encased in molten salt-based coolant; X-energy, in Maryland, uses billiard-ball-size graphite spheres called “pebbles” in its reactor design.

If you’re like me, you’ve been hearing about advanced reactors for years without a clear sense of what they mean or when they’ll be ready. They seem to occupy a weird intermediate zone where no one has ever built an advanced reactor, but also the technology is already under regulatory review. The first demonstration projects won’t get up and running for another few years. So it might seem unwise to depend on them to fix the American electricity mix in, say, 2035, when Biden hopes the power grid will be carbon-free.

But the delay in nuclear technology is unusually front-loaded on the timeline between concept and commercialization. Normally, we hear about a scientific breakthrough or new technology, then wait years (or decades) for it to make its way to market. Engineers learn how the technology works partially by building it, testing it out, and then adapting it to a mass-production environment.

But because of the risk of nuclear accidents, nuclear technology receives regulatory approval before it is even built. A new reactor design is inspected and vetted by the Nuclear Regulatory Commission. An approved advanced-nuclear reactor could go from blueprint to build-out very quickly: In the span of a few years, TerraPower or X-energy could receive regulatory approval for its design, build a demonstration unit, and then—assuming it works—fill out its order book.

Of course, there’s one thing that could put nuclear back on the defensive: a major accident. Disasters at Three Mile Island, Chernobyl, and Fukushima dissuaded governments, utilities, and investors from embracing the technology. After Fukushima, Japan shut down its fleet of 50 nuclear reactors, a phaseout that it has only recently begun to reverse, and Germany adopted plans to retire zero-carbon nuclear plants years before it shuts down coal plants.

All of this now has to happen on relatively short timelines. “The big action on climate change and for utility order books needs to happen before 2030,” Toth, of the Good Energy Collective, said. Utilities, in particular, have to decide soon what they will build to fulfill net-zero promises. “That means the first advanced-nuclear deployments in the U.S. have to go extremely well for customers to want to buy them over natural gas.”

Nuclear is losing its stigma, in other words. It’s been invited to the cool kids’ table. The reindeer games are over. Now it has to deliver.

Robinson Meyer is a staff writer at The Atlantic. He is the author of the newsletter The Weekly Planet, and a co-founder of the COVID Tracking Project at The Atlantic.

 

Will the climate crisis force America to reconsider nuclear power?


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Study assesses potential value of continued operation for Diablo Canyon

09 November 2021

Delaying the retirement of the Diablo Canyon nuclear power would reduce California's power sector carbon emissions, reduce reliance on gas, save billions in power system costs and bolster system reliability, according to a new report by authors from Stanford University, the Massachusetts Institute of Technology and LucidCatalyst. The plant could further increase its value to the state by providing multiple services including desalination and hydrogen production.

Diablo Canyon currently provides 8% of California's in-state electricity production and 15% of its carbon-free electricity production, but the state's Public Utilities Commission in January 2018 approved a multiparty settlement to fully and permanently shut the plant down when unit 2's operating licence expires in 2025. In its decision, the commission found that the plant was not cost effective to continue in operation, was not needed for system reliability, and that its value for reducing greenhouse gas emissions was "unclear", according to the authors of An Assessment of the Diablo Canyon Nuclear Plant for Zero-Carbon Electricity, Desalination, and Hydrogen Production.

"But in the intervening three and half years, several new developments have occurred," they note. These include: the signature of state legislation on zero-carbon generation and climate neutrality targets; recent studies highlighting the importance of always-available, non-weather-dependent generation capacity and reliable sources of zero-carbon fuels for hard-to-electrify sectors of the economy; blackouts and brownouts when electrical capacity has fallen below demand; mounting evidence of an increasing danger of severe water shortages; and state commitments to increase the share of land that is set aside for conservation purposes, limiting the amount of land available for energy production and other uses.

These developments led the joint study team of researchers from Stanford University and MIT to re-examine the potential value of Diablo Canyon in addressing these overlapping challenges. The team was assisted on hydrogen and multiple product research by Justin Aborn of energy analysis firm LucidCatalyst.

Delaying the retirement of the plant by ten years, to 2035, would reduce California power sector carbon emissions by more than 10% from 2017 levels and reduce reliance on gas, save USD2.6 billion in power system costs, and bolster system reliability to mitigate brownouts, the researchers found. "Even assuming rapid and unconstrained buildout of renewable energy, the continued operation of Diablo Canyon would significantly reduce California’s use of natural gas for electricity production from 2025 to 2035 by approximately 10.2 TWh per year. In doing so, Diablo Canyon would also reduce California carbon emissions by an average of 7 million tonnes (Mt) CO2 a year from 2025-2035," the report notes.

Operating the plant to 2045 and beyond could save up to USD21 billion in power system costs, potentially avoid the need to use save 90,000 acres of land for the siting of new solar photovoltaic capacity, and save up 50 Mt CO2 in cumulative emissions.

Multiple benefits


Diablo Canyon could be a "powerful driver of desalination to serve urban, industrial, and agricultural users," the study found. A desalination plant situated adjacent to Diablo Canyon would be able to augment fresh water supplies to the state as a whole and to critically under-served or overdrafted regions, at lower costs than existing or proposed desalination plants, while meeting environmental standards protecting marine life.

California "will likely need hundreds of millions of kilograms of hydrogen-based, zero-carbon fuels" annually to achieve a zero-carbon economy, the authors note. "The preliminary analysis here suggests that, with heat-assisted electrolysis, Diablo Canyon could produce 110 million kilograms of hydrogen annually at a cost of $2.01-2.46/kg. This is up to half less than the range of current costs of hydrogen produced from solar or wind power, while utilizing a small fraction of the space required for those other generation sources."

Hydrogen production at the Diablo Canyon site would also likely be cost-competitive with the hydrogen produced from natural gas with carbon capture, which is today's least expensive form of zero-carbon hydrogen production, they add.

The analysis also considered the potential to "repurpose" the nuclear plant to provide grid electricity, desalinated water, and hydrogen at the same time, and concluded that the production of these three products could "substantially increase" the value of Diablo Canyon by an amount equivalent to USD70/MWh, or even higher. "In a polygeneration configuration, the electricity output of Diablo Canyon plant could be directed to provide varying amounts of electricity to the power grid, desalination or hydrogen production, respectively, to maximise revenue, provide grid reliability, or meet other objectives, as needed," the report notes.

Repurposing the plant would not be without "many and considerable" challenges, including at the reinitiating the federal plant relicensing process. Chief among the challenges at the state level would be the need to obtain approval of a newly engineered water intake system as well as other approvals needed for the construction and operation of desalination and hydrogen production facilities, and supporting infrastructure. Stakeholders would need to be re-engaged, and "there will also likely be opposition in principle among some to the use of nuclear energy in any form, for any purpose," they note.

"While these challenges are substantial, so are the potential gains," they say. "This preliminary analysis is intended to allow policymakers and the public to consider weighing the benefits and tradeoffs associated with maintaining or rededicating Diablo Canyon in light of other new and urgent challenges that face California."

They conclude: "This study was not intended to be and should not be considered to be a definitive analysis of those benefits and tradeoffs. That will require further investigation. But the authors submit that the conclusions of this report present sufficient grounds for further study and debate by setting forth a prima facie case for extending the operations of the Diablo Canyon nuclear plant."

Funding for the project came from the MIT Center for Energy and Environmental Policy Research, the Abdul Latif Jameel Water and Food Systems Lab, the MIT Center for Advanced Nuclear Energy, the Rothrock Family Fund, the Pritzker Innovation Fund, The Rodel Foundation, Ross Koningstein, and Zachary Bogue & Matt Ocko.

Diablo Canyon's two pressurised water reactors are owned and operated by Pacific Gas and Electric Company.

The report can be downloaded here.

Researched and written by World Nuclear News


Stanford/MIT Study: Keeping Diablo Nuclear Plant Open Would Save Billions, Help Meet Emissions Goals

‘Officials so worried about power and emissions, have this gem they don’t really want anymore’


Diablo Canyon Nuclear Power Plant. (Photo: Wikipedia via Flickr)

By Evan Symon, November 9, 2021 11:49 am

A new Stanford University/Massachusetts Institute of Technology (MIT) study released on Monday found that an extending the life of Diablo Canyon Nuclear Power Plant past it’s planned 2025 closure date would help the state greatly reduce carbon emissions and meet state climate goals.

For decades, nuclear power plants have been slowly been taken offline in California. Ever since the closure of the San Onofre nuclear plant in 2013, Diablo Canyon, located in San Luis Obispo County, has been the sole remaining power plant in the state.

Following the Fukashima Daiichi disaster in Japan in 2011, pressure from environmental and local public groups fought against keeping the plant open. Concerns over earthquakes, nuclear waste pollution, and other factors convinced the California Public Utilities Commission (CPUC) to close the plant by 2025.

While legislators have been scrambling to keep it open, largely due to California being behind on green power generation and the plant accounting for 8% of all power generated in the state, it is still on track to close by mid-decade.

The Stanford/MIT Study released Monday bucked the recent trend of moving away from nuclear power, finding that keeping Diablo Canyon open until 2045 would not only help power and environmental concerns, but could also significantly help California battle drought in the future.

According to the report, extending the life of the plant would save $21 billion in power systems costs, would give more time for California to build up green energy plants, would help California meet the growing demand of power provided to electric vehicles, reduce power sector carbon emissions by 10%, and largely prevent brownouts in the future.

“Delaying the retirement of Diablo Canyon to 2035 would reduce California power sector carbon emissions by more than 10% from 2017 levels and reduce reliance on gas, save $2.6 Billion in power system costs, and bolster system reliability to mitigate brownouts,” noted the study. “If operated to 2045 and beyond, Diablo Canyon could save up to $21 Billion in power system costs and spare 90,000 acres of land from use for energy production, while meeting coastal protection requirements.”

The additional, unplanned energy, if linked to a new desalination and/or hydrogen plant, would also provide more fresh water being brought back into reservoirs than any current state plan and would drastically reduce green energy costs while working on far less needed land for future green energy production.
Positives, negatives of keeping Diablo Canyon open until 2045

The report also hinted at a possible return of more nuclear plants allowing for more of an ease into California’s 2045 carbon emission-free power goal.

“In order to combat climate change in the best possible way, I think nuclear power is something that we should really consider and ask PG&E to reconsider,” said former Secretary of Energy and current Stanford Professor Steven Chu. “When Japan and Germany shut nuclear power plants in recent years it led to a rise in carbon emissions from fossil fuels.”

Other experts agree that keeping Diablo Canyon open would bring vastly more positives than negatives.

“Our nuclear energy technology has greatly reduced the chances of a meltdown or a similar disaster from occurring,” said Sal Braith, a nuclear engineer who worked at several nuclear plants in the Northeast, in a Globe interview on Tuesday. “All the big incidents people think of, like Three Mile Island, or Chernobyl, or Fukashima, they were all in plants with older technology. Upgrading Diablo Canyon, which still has a sound design that still holds up today, would do wonders for California. They’re so worried about power and emissions in the future, well, they have this gem they don’t really want anymore. The solution to their problems is literally right there.”

“And everything the report brings up, like lowering emissions and connecting to other environmentally friendly things, we’ve been screaming that for years for states to pick up on that. California has an easier time for emissions goals to be met, it staves off power concerns for awhile, the water crisis is largely alleviated, and a lot of jobs are created. And if more are built, it only increases those by many-fold.”

However, environmental opponents stressed that even with the report showing many positives, the negatives are still too much for any kind of reconsideration.

“It is enticing, I have to admit that,” said Melissa Key, an environmental lawyer who has represented environmental groups against energy companies with nuclear power plants in the past, to the Globe on Tuesday. “But every year of operation means the greater chance of something going wrong. And I don’t think that I even need to tell you the dangers of what a major nuclear accident, especially one so close to fault lines, can do.”

“This is the last one in the state, and for the good of California, it needs to stop. Solar, wind, and other energies will be able to pick up the slack by 2025.”

As of Tuesday, the Stanford/MIT has yet to illicit a response from California energy officials.


Keeping California’s Last Nuclear Plant Can Save Money, Climate: MIT-Stanford Study

PG&E’s Diablo Canyon nuclear plant scheduled to close in 2025

Researchers say keeping it open could cut emissions and costs

By David R Baker 
November 8, 2021
The PG&E Diablo Canyon nuclear power plant in Avila Beach, California in 2012. 
Photographer: David Paul Morris/Bloomberg

California’s last nuclear power plant, scheduled to close in 2025, could aid the fight against climate change, cut energy costs and provide water to the parched state if allowed to stay open, according to a new study.

The findings won the support of former U.S. Energy Secretary Steven Chu, who in a web presentation said countries prematurely shutting down nuclear plants ended up using more fossil fuels instead.

“We are not in a position in the near-term future to go to 100% renewable energy,” said Chu, who was not one of the report’s authors. “We will need some power that we can turn on and dispatch at will, and that leaves two choices: fossil fuel or nuclear.”

PG&E Corp. reached an agreement with environmental groups in 2016 to shutter the Diablo Canyon nuclear plant when its operating licenses expire, saying the plant’s energy would no longer be needed as cheap renewable power flooded onto the state’s grid. Since then, however, California’s energy supply has grown strained, with the state veering close to blackouts during heat waves.

Researchers from Stanford University and the Massachusetts Institute of Technology said in the study released Monday that keeping Diablo Canyon open through 2035 would cut greenhouse-gas emissions from California’s power sector 10% each year, by reducing the amount of electricity needed from natural-gas plants. It would also save $2.6 billion for utility ratepayers. Keep Diablo Canyon open until 2045, and the savings would grow to $21 billion, they said. The report’s authors also examined using the coastal power plant’s electricity to produce hydrogen or desalinate sea water.

Read more: California Taps Green Power to Replace Nuclear, Gas Plants

Keeping Diablo open would require a license extension from the Nuclear Regulatory Commission as well as the approval of California regulators -- not to mention a change of heart from PG&E. A company representative noted the plan to close the plant had already been approved by California officials.

“The state has made clear its position on nuclear energy,” PG&E spokeswoman Suzanne Hosn said in an email. “Our focus therefore remains on safely and reliably operating the plant until the end of its NRC licenses.”

Chu called PG&E’s decision to close the plant “distressing.” The plant, which is nearly surrounded by fault lines discovered after construction began, faced decades of opposition, which swelled again after the 2011 Fukushima nuclear accident in Japan. But Diablo Canyon also won the support of some environmentalists convinced it was needed to fight global warming.

“Nuclear power is something we should reconsider, and we should ask PG&E to reconsider,” Chu said.

MINING IS NOT SUSTAINABLE

Sask. company at forefront of sustainable lithium mining with new tech

Saskatoon / 650 CKOM
Sask. company at forefront of sustainable lithium mining with new tech

Zach Maurer, the president and CEO of Prairie Lithium, holds a small jar of lithium and other jars of the chemicals used in the process of extracting lithium from oil well brine on Nov. 9, 2021. (Lisa Schick/980 CJME)



The demand for lithium has jumped substantially in the last few years and is poised to keep doing so as electric vehicles continue storming the vehicle market.

The hitch is that mining the lithium itself isn’t very green, but a Saskatchewan company believes it has figured out a solution.

Prairie Lithium’s pilot processing facility is in a small, unassuming building in Emerald Park 10 minutes east of Regina — but if its work pans out, it could have large potential for Saskatchewan.

“If the goal is to de-carbonize transport through electrification, everybody has to be very cognizant of the materials going into those vehicles and how those materials were mined in the world,” said Zach Maurer, president and CEO of Prairie Lithium.

Maurer explained that sustainability is what the company had in mind when developing the new process to extract lithium from subsurface brine water in the oilfields.

Other ways of lithium mining and in other parts of the world are criticized for using a lot of land and huge amounts of water, and have been linked to contamination and animal deaths.

However, in creating its process, Maurer said Prairie Lithium really focused on reducing land use, and the volume of freshwater used, waste generated and CO2 produced.

“In terms of sustainability, it’s obviously at the forefront of the transition to electric vehicles,” said Maurer.

In simplified terms, to get the lithium, the company drills into the brine underground and gets the fluid to the surface using brackish water that has been converted to reverse osmosis water. The company uses an ion exchange material to get the lithium out and then put the brine back underground.

Maurer said the company started work on the technology in test tubes and beakers in January 2020.

“From there we really focused on scaling up the chemistry and the process for total proof of concept,” explained Maurer.

This fall, the company finished drilling its first dedicated lithium brine well in the southeast part of the province, which was also a first for Saskatchewan. The company’s processing facility has managed to extract 99.7 per cent of lithium from brine “in a matter of minutes,” according to a news release.

“Now we’re actively working to interpret that data, quantify the resource and then put the best resource development plan in place so that when we do expand, it’s methodical and ready to go,” said Maurer.

It could take between two and four years to scale all the way up, according to Maurer.

The company used the Saskatchewan Advantage Innovation Fund and Saskatchewan Petroleum Innovation Incentive to help fund the work — help Maurer said was incredibly important.

“We didn’t have a lot of cash flowing into the business, if any. So to receive those grants in 2020 when COVID hit really, ultimately put the project onto the trajectory it is. It allowed us to work through what happened with the global pandemic so that we can continue to build this project here in the province,” said Maurer.

The well drilled this fall created more than 100 temporary jobs, but Maurer couldn’t say how many jobs — permanent or temporary — could be created once the company is scaled up.

Maurer said the company is still in the process of figuring out how big its operations could scale to, so he wasn’t willing to say how much lithium could be produced, but did say the potential is large for Saskatchewan.

Global demand for lithium is expected to increase five times its current rate by 2030, and a recent price for lithium hydroxide hit $29,000 USD per ton, according to Maurer.

Energy and Natural Resources Minister Bronwyn Eyre agreed there is potential in lithium.

“There’s enormous potential in terms of signals that we’re getting from the sector around subsurface disposition interest (and) exploration,” said Eyre.

She said the innovations in lithium mining are building on strengths the province already has.

“We have an opportunity to put ourselves in the forefront here in that global conversation … If we can position Saskatchewan for the future and for growing demand in these growing areas, of course, we’re all in,” said Eyre.

According to the provincial government, so far this year sub-surface mineral public offerings — which target minerals including but not limited to lithium — have raised more than $4.2 million in revenue for the province



About 26,000 tonnes of plastic Covid waste pollutes world’s oceans – study

Increased demand for PPE has put pressure on an already out-of-control global problem, report finds

Increased use of personal protective equipment including gloves and masks during the pandemic has added to an existing problem of mismanaged plastic waste, the report found.
 Photograph: Seaphotoart/Alamy

Mon 8 Nov 2021

Plastic waste from the Covid-19 pandemic weighing 25,900 tonnes, equivalent to more than 2,000 double decker buses, has leaked into the ocean, research has revealed.

The mismanaged plastic waste, consisting of personal protective equipment such as masks and gloves, vastly exceeded the capability of countries to process it properly, researchers said.

Covid has made us use even more plastic – but we can reset

Since the beginning of the pandemic, an estimated 8.4m tonnes of plastic waste has been generated from 193 countries, according to the report, published on Monday.

“The Covid-19 pandemic has led to an increased demand for single-use plastics that intensifies pressure on an already out-of-control global plastic waste problem,” said Yiming Peng and Peipei Wu from Nanjing University, the authors of Magnitude and impact of pandemic-associated plastic waste published in the online journal PNAS.

“The released plastics can be transported over long distances in the ocean, encounter marine wildlife, and potentially lead to injury or even death,” they added.

study in March presented the first case of a fish entrapped in a medical glove, encountered during a canal cleanup in Leiden, the Netherlands. In Brazil a PFF-2 protective mask was found in the stomach of a dead Magellanic penguin.

The scientists predicted that by the end of the century almost all pandemic-associated plastics will end up on either the seabed or on beaches.

The Chinese study found that 46% of the mismanaged plastic waste came from Asia, due to the high level of mask-wearing by individuals there, followed by Europe, 24%, and North and South America, 22%.

Peng and Wu said their research suggested 87.4% of the excess waste was from hospitals, rather than from individual use. PPE usage by individuals contributed only 7.6% of the total, while packaging and test kits accounted for 4.7% and 0.3% respectively.

“Most of the plastic is from medical waste generated by hospitals that dwarfs the contribution from personal protection equipment and online-shopping package material,” they wrote.

“This poses a long-lasting problem for the ocean environment and is mainly accumulated on beaches and coastal sediments.”

The thousands of tonnes of masks, gloves, testing kits and face visors which leached into the oceans from the start of the pandemic up to August this year, were transported in 369 major rivers.

Chief among these were Shatt al-Arab in south-eastern Iraq, which carried 5,200 tonnes of PPE waste to the ocean; the Indus river, which arises in western Tibet, carried 4,000 tonnes and the Yangtze river in China 3,700 tonnes. In Europe, the Danube carried the most plastic pandemic waste into the ocean: 1,700 tonnes.

The top 10 rivers accounted for 79% of pandemic plastic discharge, the top 20 for 91%, and the top 100 for 99%. About 73% of the discharge was from Asian rivers followed by European watercourses (11%), with minor contributions from other continents, the report said.

“These findings highlight the hotspot rivers and watersheds that require special attention in plastic waste management,” the authors said.

“We find a long-lasting impact of the pandemic-associated waste release in the global ocean. At the end of this century, the model suggests that almost all the pandemic-associated plastics end up in either the seabed (28.8%) or beaches (70.5%).”

The authors saidthe findings showed better medical waste management was needed in pandemic epicenters, especially in developing countries.


Plastic waste release caused by COVID-19 and its fate in the global ocean

Yiming Peng, Peipei Wu, Amina T. Schartup, and View ORCID Profile
Yanxu Zhang


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PNAS November 23, 2021 118 (47) e2111530118; https://doi.org/10.1073/pnas.2111530118


Edited by B. L. Turner, Arizona State University, Tempe, AZ, and approved October 6, 2021 (received for review June 22, 2021)


Article
Figures & SI
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PDF


Significance

Plastic waste causes harm to marine life and has become a major global environmental concern. The recent COVID-19 pandemic has led to an increased demand for single-use plastic, intensifying pressure on this already out-of-control problem. This work shows that more than eight million tons of pandemic-associated plastic waste have been generated globally, with more than 25,000 tons entering the global ocean. Most of the plastic is from medical waste generated by hospitals that dwarfs the contribution from personal protection equipment and online-shopping package material. This poses a long-lasting problem for the ocean environment and is mainly accumulated on beaches and coastal sediments. We call for better medical waste management in pandemic epicenters, especially in developing countries.

Abstract

The COVID-19 pandemic has led to an increased demand for single-use plastics that intensifies pressure on an already out-of-control global plastic waste problem. While it is suspected to be large, the magnitude and fate of this pandemic-associated mismanaged plastic waste are unknown. Here, we use our MITgcm ocean plastic model to quantify the impact of the pandemic on plastic discharge. We show that 8.4 ± 1.4 million tons of pandemic-associated plastic waste have been generated from 193 countries as of August 23, 2021, with 25.9 ± 3.8 thousand tons released into the global ocean representing 1.5 ± 0.2% of the global total riverine plastic discharge. The model projects that the spatial distribution of the discharge changes rapidly in the global ocean within 3 y, with a significant portion of plastic debris landing on the beach and seabed later and a circumpolar plastic accumulation zone will be formed in the Arctic. We find hospital waste represents the bulk of the global discharge (73%), and most of the global discharge is from Asia (72%), which calls for better management of medical waste in developing countries.
plastic
ocean
MITgcm
COVID-19

Plastics have an excellent strength to weight ratio, and they are durable and inexpensive, making them the material of choice for most disposable medical tools, equipment, and packaging (12). The COVID-19 pandemic has demonstrated the indispensable role of plastic in the healthcare sector and public health safety (2). As of August 23, 2021, about 212 million people worldwide have been infected with the COVID-19 virus with the most confirmed cases in the Americas (47.6%) and Asia (31.22%) followed by Europe (17.26%) (3). The surging number of inpatients and virus testing substantially increase the amount of plastic medical waste (4). To sustain the enormous demand for personal protective equipment (PPE, including face masks, gloves, and face shields), many single-use plastic (SUP) legislations have been withdrawn or postponed (2). In addition, lockdowns, social distancing, and restrictions on public gathering increase the dependency on online shopping at an unprecedented speed, the packaging material of which often contains plastics (56).

Unfortunately, the treatment of plastic waste is not keeping up with the increased demand for plastic products. Pandemic epicenters in particular struggle to process the waste (7), and not all the used PPEs and packaging materials are handled or recycled (89). This mismanaged plastic waste (MMPW) is then discharged into the environment, and a portion reaches the ocean (10). The released plastics can be transported over long distances in the ocean, encounter marine wildlife, and potentially lead to injury or even death (1114). For example, a recent report estimated that 1.56 million face masks entered the oceans in 2020 (15). Earlier studies have also raised the potential problem of COVID-19 plastic pollution and its impact on marine life (1618). Some cases of entanglement, entrapment, and ingestion of COVID-19 waste by marine organisms, even leading to death, have been reported (1920). The plastic debris could also facilitate species invasion and transport of contaminants including the COVID-19 virus (2123). Despite the potential impacts, the total amount of pandemic-associated plastic waste and its environmental and health impacts are largely unknown. Here, we estimate the amount of excess plastic released during the pandemic that enters the global ocean and its long-term fate and potential ecological risk.

Results
MMPW Generation.

As of August 23, 2021, the total excess MMPW generated during the pandemic is calculated as 4.4 to 15.1 million tons (Fig. 1). We use the average of scenarios with different assumptions as our best estimate (Methods), which is about 8.4 ± 1.4 million tons. A dominant fraction (87.4%) of this excess waste is from hospitals, which is estimated based on the number of COVID-19 inpatients (24) and per-patient medical waste generation for each country (25). PPE usage by individuals contributes only 7.6% of the total excess wastes. Interestingly, we find that the surge in online shopping results in an increased demand for packaging material. However, we find that packaging and test kits are minor sources of plastic waste and only account for 4.7% and 0.3%, respectively.

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Fig. 1.

Global generation of mismanaged plastics from different sources (hospital medical waste, test kits, PPE, and online packaging) attributable to the COVID-19 pandemic. High- and low-yield scenarios are considered for each source (Methods).


Table 1 shows the distribution of COVID-19 cases across different continents (Asia, Europe, North America, South America, Oceania, and Africa). About 70% of COVID-19 cases are found in North and South America and Asia (Table 1). We find that MMPW generation does not follow the case distribution, as most MMPW is produced in Asia (46%), followed by Europe (24%), and finally in North and South America (22%) (Table 1 and Fig. 2E). This reflects the lower treatment level of medical waste in many developing countries such as India, Brazil, and China (range between 11.5 and 76% as the low- and high-end estimates) compared with developed countries with large numbers of cases in North America and Europe (e.g., the United States and Spain) (0 to 5%) (Fig. 2A). The MMPW generated from individual PPE is even more skewed toward Asia (Fig. 2C and SI Appendix, Table S1) because of the large mask-wearing population (26). Similarly, the MMPW generated from online-shopping packaging is the highest in Asia (Fig. 2D). For instance, the top three countries in the express-delivery industry of global share are China (58%), United States (14.9%), and Japan (10.3%) followed by the United Kingdom (4%) and Germany (4%) (27).

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Table 1.

Percentage of the confirmed COVID-19 cases (as of August 23, 2021), the generated mass of pandemic-associated MMPW ending up in the environment, and the pandemic-associated MMPW that is transported to river mouths for different continents


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Fig. 2.

Accumulated riverine discharge of pandemic-associated mismanaged plastics to the global ocean. Panels are for the discharges caused by (A) hospital medical waste, (B) COVID-19 virus test kits, (C) PPE, (D) online-shopping packaging material, and (E) the total of them. The background color represents the generated MMPW in each watershed, while the sizes of the blue circles are for the discharges at river mouths.

Riverine Discharge of MMPW.

Based on the MMPW production from each country and a hydrological model (28), we calculate a total discharge of 25.9 ± 3.8 (12.3 as microplastics [< 5 mm] and 13.6 as macroplastics [> 5 mm]) thousand tons of pandemic-associated plastics to the global ocean from 369 major rivers and their watersheds (Fig. 2E). We believe that the 369 rivers (account for 91% of the global riverine plastic discharge to the sea) considered here include a vast majority of the global pandemic-associated plastic discharge. The top three rivers for pandemic-associated plastic waste discharge are Shatt al Arab (5.2 thousand tons, in Asia), Indus (4.0 thousand tons, in Asia), and Yangtze River (3.7 thousand tons, in Asia) followed by Ganges Brahmaputra (2.4 thousand tons, in Asia), Danube (1.7 thousand tons, in Europe), and Amur (1.2 thousand tons, in Asia). These findings highlight the hotspot rivers and watersheds that require special attention in plastic waste management.

Overall, the top 10 rivers account for 79% of pandemic plastic discharge, top 20 for 91%, and top 100 for 99%. About 73% of the discharge is from Asian rivers followed by Europe (11%), with minor contributions from other continents (Table 1). This pattern is different from that of the generation of MMPW (Table 1) because of the different ability of rivers to export plastic load to the ocean, which is measured as the yield ratio (defined as the ratio between the plastic discharges at the river mouth and the total MMPW generation in the watershed). The yield ratio is influenced by factors such as the distribution of plastic release along rivers and the physical conditions of rivers (e.g., water runoff and velocity) (28). The top five rivers with the highest yield ratios are the Yangtze River (0.9%), Indus (0.5%), Yellow River (0.5%), Nile (0.4%), and Ganges Brahmaputra (0.4%). These rivers have either high population density near the river mouth, large runoff, fast water velocity, or a combination of them. The combination of high pandemic-associated MMPW generations and yield ratio for Asian rivers results in their high discharge of MMPW to the ocean.
The Fate of MMPW in the Ocean.

We simulate the transport and fate of the 25,900 ± 3,800 tons of pandemic-associated plastic waste by the Nanjing University MITgcm-Plastic model (NJU-MP) to evaluate its impact on the marine environment. The model considers the primary processes that plastics undergo in seawater: beaching, drifting, settling, biofouling/defouling, abrasion, and fragmentation (29). The model reveals that a large fraction of the river discharged plastics are transferred from the surface ocean to the beach and seabed within 3 y (Fig. 3). At the end of 2021, the mass fraction of plastics in seawater, seabed, and beach are modeled as 13%, 16%, and 71% respectively. About 3.8% of the plastics are in the surface ocean with a global mean concentration of 9.1 kg/km2. Our model also suggests that the discharged pandemic-associated plastics are mainly distributed in ocean regions relatively close to their sources, for example, middle- and low-latitude rivers distributed in East and South Asia, South Africa, and the Caribbean (Fig. 4 and SI Appendix, Fig. S2). The beaching and sedimentation fluxes are mainly distributed near major river mouths (Fig. 4 and SI Appendix, Fig. S2). This suggests that the short-term impact of pandemic-associated plastics is rather confined in the coastal environment.

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Fig. 3.

Projection of the fate of discharged pandemic-associated plastics (including both microplastics and macroplastics) in the global ocean. (A) The mass fractions and average concentrations in the surface ocean. (B) The mass fractions in the seawater, seabed, and beaches.


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Fig. 4.

Modeled spatial distribution of mass concentrations of COVID-19-associated plastics in the surface ocean (A–C, J–L), on the beaches (D–F, M–O), and the seabed (G–I, P–R) in 2021, 2025, and 2100, respectively. The black boxes on the Top panel indicate the five subtropical ocean gyres (North Pacific Gyre, North Atlantic Gyre, South Pacific Gyre, South Atlantic Gyre, and Indian Gyre). Panels A–I are for the microplastics, while J–R are for the macroplastics.


The model suggests the impact could expand to the open ocean in 3 to 4 y. The mass fraction of plastics in the seawater is predicted to decrease in the future while those in seabed and beach are modeled to gradually increase. At the end of 2022, the fractions of riverine discharged, pandemic-associated MMPW in seawater, seabed, and beach are modeled as 5%, 19%, and 76%, respectively, and the mean surface ocean concentration sharply decreases to 3.1kg/km2. In 2025, five garbage patches in the center of subtropic gyres merge, including the four in North and South Atlantic and Pacific and the one in the Indian Ocean (Fig. 4 and SI Appendix, Fig. S2). Hot spots for sedimentation fluxes are also modeled in the high-latitude North Atlantic and the Arctic Ocean in 2025 (Fig. 4 and SI Appendix, Fig. S2), reflecting the large-scale vertical movement of the seawaters (SI Appendix, Fig. S3).

We find a long-lasting impact of the pandemic-associated waste release in the global ocean. At the end of this century, the model suggests that almost all the pandemic-associated plastics end up in either the seabed (28.8%) or beaches (70.5%), potentially hurting the benthic ecosystems. The global mean pandemic-associated plastic concentrations in the surface ocean are predicted to decrease to 0.3 kg/km2 in 2100, accounting for 0.03% of the total discharged plastic mass. However, two garbage patches are still modeled over the northeast Pacific and the southeast Indian Ocean, exerting persistent risk for ecosystems over there. The fate of microplastics and macroplastics are similar but with a higher fraction of macroplastics ending up in the beaches due to their lower mobility (Fig. 4 and SI Appendix, Fig. S1).

The Arctic Ocean appears to be a dead-end for plastic debris transport due to the northern branch of the thermohaline circulation (30). About 80% of the plastic debris discharged into the Arctic Ocean will sink quickly, and a circumpolar plastic accumulation zone is modeled to form by 2025. In this year, the Arctic seabed accounts for 13% of the global plastic sedimentation flux, but this fraction will increase to 17% in 2100. The Arctic ecosystem is considered to be particularly vulnerable due to the harsh environment and high sensitivity to climate change (3132), which makes the potential ecological impact of exposure to the projected accumulated Arctic plastics of special concern.

Discussion

It is speculated that the pandemic will not be completely controlled in a couple of years, and many of the containing policies will continue to be implemented (33). By the end of 2021, it is conservatively estimated that the number of confirmed cases will reach 280 million (34). The generated pandemic-associated MMPW will reach a total of 11 million tons, resulting in a global riverine discharge of 34,000 tons to the ocean. The MMPW generation and discharge are expected to be more skewed toward Asia due to record-breaking confirmed cases in India (3). Given the linearity between the discharge and ocean plastic mass, the fate and transport of the newly generated plastic discharge can be deduced from our current results.

There are substantial uncertainties associated with our estimate of pandemic-associated MMPW release due to the lack of accurate data (e.g., the number of used masks and online-shopping packages and the fraction of mismanaged waste under the over-capacity conditions). For example, our estimate for the discharge from face mask usage is much lower than that of Chowdhury et al. (35), which assumes that a person uses a single mask daily while we assume a mask lasts for 6 d based on survey data (Methods). We thus consider multiple scenarios to cap the actual situations (Methods). The estimated MMPW as hospital medical waste varies by ±53%, while that from packaging and PPE vary by ±25% and a factor of ∼3.5, respectively. The estimated amounts of riverine MMPW discharge to the ocean have also uncertainty as they are based on a coarse resolution (i.e., watershed-wise) hydrological model (28). In addition, factors such as the fragmentation, abrasion, and beaching rate of plastics in NJU-MP also have a substantial influence on the simulation results (29). Despite these uncertainties, the spatial pattern of the pandemic-associated releases and their relative fate in different compartments of the ocean is more robust.

The pandemic-associated plastic discharge to the ocean accounts for 1.5 ± 0.2% of the total riverine plastic discharges (2836). A large portion of the discharge is medical waste that also elevates the potential ecological and health risk (37) or even the spreading of the COVID-19 virus (38). This offers lessons that waste management requires structural changes. The revoking or delaying of the bans on SUPs may complicate plastic waste control after the pandemic. Globally public awareness of the environmental impact of PPE and other plastic products needs to be increased. Innovative technologies need to be promoted for better plastic waste collection, classification, treatment, and recycling, as well as the development of more environmentally friendly materials (1539). Better management of medical waste in epicenters, especially in developing countries, is necessary.

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