Tag Archives: nuclear waste storage

The Rolls Royce Nuclear Reactor

Small modular nuclear  reactors (SMRs) are relatively small and flexible: they have a power capacity of up to 300 MW(e) and their output can fluctuate in line with demand. This makes them particularly attractive for remote regions with less developed grids, but also for use as a complement to renewables and for non-electric applications of nuclear power. SMRs can be manufactured and then shipped and installed on site, so they are expected to be more affordable to build.

The Rolls Royce SMR is small enough to be transported by truck.

Globally, there are about 50 SMR designs and concepts at different stages of development. Three SMR plants are in advanced stages of construction or commissioning in Argentina, China and Russia, which are all scheduled to start operation between 2019 and 2022…Some SMR designs have features that could reduce the tasks associated with spent fuel management. Power plants based on these designs require less frequent refuelling, every 3 to 7 years, in comparison to between 1 and 2 years for conventional plants, and some are even designed to operate for up to 30 years without refuelling. Nevertheless, even in such cases, there will be some spent fuel left, which will have to be properly managed.

Excerpts from Small Modular Reactors: A Challenge for Spent Fuel Management? IAEA News, Aug. 8, 2019

A Nuclear Leaking Grave

The Bravo test, the testiong of a nuclear bomb on March 1, 1954, in the Bikini Atoll of the Marshall Islands resulted in an explosion that was 2½ times larger than expected. Radioactive ash dropped more than 7,000 square miles from the bomb site, caking the nearby inhabited islands.  “Within hours, the atoll was covered with a fine, white, powder-like substance,” the Marshall Islands health minister would later testify, according to the Atomic Heritage Foundation. “No one knew it was radioactive fallout. The children played in the ‘snow.’ They ate it.”

The 1954 explosion was part of nuclear tests conducted as the American military lurched into the nuclear age. From 1946 o 1958, 67 U.S. nuclear tests were conducted in the Marshall islands….From 1977 to 1980, loose waste and top soil debris scraped off from six different islands in the Enewetak Atoll was transported to Runit island and was mixed with concrete and buried in nuclear blast crater. 4,000 US servicemen were involved in the cleanup that took three years to complete. The waste-filled crater was finally entombed in concrete.  The Runit Dome, also called locally “The Tomb”, is a 46 cm (18 in) thick dome of concrete at sea level, encapsulating an estimated 73,000 m3 (95,000 cu yd) of radioactive debris, including some plutonium-239. …The structure, however, was never meant to last. Today, due to disrepair and rising sea tides, it is dangerously vulnerable. A strong storm could breach the dome, releasing the deadly legacy of America’s nuclear might….

Cracks have reportedly started to appear in the dome. Part of the threat is that the crater was never properly lined, meaning that rising seawater could breach the structural integrity. “The bottom of the dome is just what was left behind by the nuclear weapons explosion,” Michael Gerrard, the chair of Columbia University’s Earth Institute, told the ABC. “It’s permeable soil. There was no effort to line it. And therefore, the seawater is inside the dome. 

According to Guterres, UN Secretary General, who refers to Runit Dome as nuclear coffin: The Pacific was victimized in the past as we all know, The consequences of these have been quite dramatic, in relation to health, in relation to the poisoning of waters in some areas.”

Excerpts from Kyle Swenson , The U.S. put nuclear waste under a dome on a Pacific island. Now it’s cracking open, Washington Post, May 20, 2019 and Wikipedia

Getting Rid of Nuclear Waste for Good: A Dream Coming True?

Gerard Mourou—one of the three winners of the 2018 Nobel Prize for Physics—claims that the lifespan of radioactive waste could potentially be cut to minutes from thousands of years. Although Mourou, 74, is quick to say that the laser option for nuclear waste that he and Irvine, California-based Professor Toshiki Tajima are working on may be years away, its promise has created a flurry of excitement for the sector in France.

 Environmental group Greenpeace estimates that there’s a global stockpile of about 250,000 tons of toxic spent fuel spread across 14 countries, based on data from the International Atomic Energy Agency. Of that, 22,000 cubic meters—roughly equivalent to a three-meter tall building covering an area the size of a soccer pitch—is hazardous, according to the IAEA. A 2015 report by GE-Hitachi put the cost of disposing nuclear waste—outside of China, Russia and India—at well over $100 billion.  France produces more nuclear waste per-capita than any other country. With almost 72 percent of its electricity coming from nuclear energy—the most in the world—it generates 2 kilograms of radioactive waste per person each year. And although only a fraction of that is highly toxic, more than 60 years after getting into nuclear energy, the country still has no definitive way to cope with it.

In April 2019, France opened its third national debate on nuclear waste, bringing together policy makers, advocacy groups and scientists to discuss handling an estimated 10,000 cubic meters of radioactive waste collectively produced by the country’s 58 reactors over their lifespan. And that doesn’t include atomic material generated by the military and medical sectors.

The most toxic parts are stored right now in short-term facilities in La Hague in Normandy, in Marcoule and Cadarache in southern France and in Valduc, near Dijon. At the facility in La Hague, an hour’s drive from the D-Day beaches, specially designed robots cast the most radioactive nuclear waste into glass casings before putting them in inox containers. Already the world’s largest facility for processing atomic waste, it is constantly being expanded—making a long-term solution urgent.

State-controlled nuclear entities Electricite de France SA and Orano SA, charged with nuclear waste management, and CEA, France’s Atomic Energy Agency, have spent billions on the toxic material. At least another 25 billion euros ($28 billion) is set to be plowed into an underground maze of tunnels near the village of Bure in northeastern France that could be the final resting place for the highly toxic waste starting in 2025.  Like with other deep storage sites in place, under construction or being considered in countries including the U.S., Japan, Finland and Sweden, the Bure plan has drawn protests. Greenpeace has pointed to several risks, not least of which being the chance of the toxic material seeping into the groundwater or a fire releasing radioactive gases.

Enter Mourou, with his high-intensity laser option. The physicist’s work has paved the way for the shortest and most-intense laser pulses ever created. In his Nobel Lecture on Dec. 8, Mourou laid out his vision for using his “passion for extreme light” to address the nuclear-waste problem.  The process he and Tajima are working on is called transmutation, which involves changing the composition of an atom’s nucleus by bombarding it with a laser. “It’s like karate—you deliver a very strong force in a very, very brief moment,” said Mourou…Transmutation research has been going on for three decades, with efforts in the U.K., Germany, Belgium, U.S. and Japan either failing or in various stages of study…“I can imagine that the physics might work, but the transmutation of high-level nuclear waste requires a number of challenging steps, such as the separation of individual radionuclides, the fabrication of targets on a large scale, and finally, their irradiation and disposal,” said Rodney C. Ewing, a professor in nuclear security and geological sciences at Stanford University. A radionuclide is an atom that has excess nuclear energy, making it unstable.

Excerpts from Zapping Nuclear Waste in Minutes Is Nobel Winner’s Holy Grail Quest, Bloomberg, Apr. 2, 2019

Why Texas Loves Nuclear Waste

A proposal to take in more out-of-state waste at a West Texas radioactive waste disposal site has encountered an unlikely argument against it: that it can harm the booming oil and gas industry.  Waste Control Specialists is asking state lawmakers for permission to take in more low-level radioactive waste — such as rags, syringes and protective clothing from nuclear plants or hospitals — from outside of Texas for disposal at its Andrews County facility near the Texas-New Mexico border.

Environmental groups have long opposed radioactive waste at the site, which they say could jeopardize groundwater.  Environmentalists at the hearing were joined by Tommy Taylor, director of oil and gas development for Fasken Oil and Ranch, which operates in Andrews County.  Quoting from a handbook of the International Atomic Energy Agency, Taylor said radioactive waste dumps should be sited away from “land with exportable minerals and energy resources.”  “Don’t put it in an oilfield,” he said. “The oil and gas resources of the Permian Basin are too important for the security of the state of Texas and the United States to put it at risk with storing spent fuel rod casks in this region.”

Spent fuel is not designated as low-level waste, but he said he worried that designation could change.  It’s unusual for a representative of an oil and gas company to publicly criticize at the Capitol another segment of the energy industry…

But If Waste Control Specialists becomes insolvent the state might have to take control of the facility.  The legislation poposed by Texas lawmakers lifts the cap on the amount of out-of-state, low-level waste the company can accept at the 8.9 million cubic feet-capacity site from 30 percent to 60 percent.  The company currently pays six Austin lobbyists as much as $240,000 to persuade lawmakers of the wisdom of its plans….Waste Control Specialists’ partnership with Orano USA, called Interim Storage Partners LLC, has asked the Nuclear Regulatory Commission for permission to accept used nuclear fuel — high-level waste — at the Andrews facility.  Waste Control Specialists, which already disposes of other kinds of radioactive waste at its site in Andrews County, has been trying to position itself as a short-term alternative to Yucca Mountain, the Nevada site long ago selected by the federal government for storage of radioactive waste. Yucca had been bedeviled by decades of political quarrels, even as radioactive waste has piled up at the country’s nuclear power plants.

Excerpt from Asher Price, Radioactive waste site seeks more out-of-state material, Statesman, Mar. 30, 2019

Cleaning Up the US Nuclear Weapons Complex

A report from the National Academies of Sciences published in March 2019 recommends changes in the way that the U.S. Department of Energy manages science and technology (S&T) development in order to accelerate the cleanup of radioactive waste and contaminated soil, groundwater, and facilities at U.S. nuclear weapons sites.

A portion of DOE’s technology development should focus on breakthrough solutions and technologies that can substantially reduce schedules, risks, and uncertainties in the cleanup, says Independent Assessment of Science and Technology for the Department of Energy’s Defense Environmental Cleanup Program. This effort should be managed by ARPA-E, a DOE division that has a record of investing in innovative solutions for complex technical challenges; it would require substantial new funding…DOE’s Office of Environmental Management (DOE-EM) is responsible for cleaning up 107 sites in 31 states and one territory that were used for nuclear weapons development, testing, and related activities during the Manhattan Project and Cold War. The cleanup program began in 1989 and has, over the past three decades, cleaned up 91 sites at a cost of about $170 billion. DOE-EM projects that it will spend at least another 50 years and $377 billion to complete its cleanup of the 16 remaining sites.

The new report says that these time and cost estimates are highly uncertain – and probably low – because of significant remaining technical challenges and uncertainties, and also because additional sites and facilities may be added to the cleanup program in the future. ..Currently, DOE-EM’s management of S&T development is ad hoc and uncoordinated, the report says. Most DOE-EM-related S&T development activities are focused on individual sites, are driven and managed by contractors, and have a short-term emphasis on addressing technical challenges in existing cleanup projects…The successful cleanup of the large, complex Rocky Flats site near Denver showed that technology development and deployment can have major impacts in accelerating schedules and reducing costs, the report notes. The remaining cleanup sites – which include large, complex sites such as Hanford in Washington state, the Savannah River Site in South Carolina, and the Oak Ridge Reservation in Tennessee – provide an opportunity for S&T to have similar impacts.

The report identifies seven examples of technologies and alternative approaches that could substantially reduce costs and speed cleanup schedules – these include changes in waste chemistry and nuclear properties to facilitate treatment and disposal, and changes in human involvement in cleanup activities to increase efficiencies and reduce worker risks. 

Excerpts from Breakthrough Solutions and Technologies Needed to Speed Cleanup of U.S. Nuclear Weapons Sites, National Academies Press Release, Mar. 4, 2019

Nuclear Priesthood: the future of nuclear waste

As  the world increasingly buries its nuclear waste, a growing number of experts are trying to come up with a way to warn future generations of what, exactly, will be lying under their feet.    Deciding where to create nuclear waste storage sites, demarcating them clearly and then writing it all down seems like the obvious solution. After all, mankind started writing down its history 5,500 years ago and the likelihood of us stopping to do so seems slim.   But the question then becomes: what should we write this crucial piece of information on?  Stone and paper deteriorate. USB sticks and servers do, too.  Some government entities, like ANDRA, the French National Agency in charge of managing radioactive waste, have started to record their archive on permanent paper.  Also known as acid-free paper due to its composition, it can remain chemically and physically stable for a long period of time — unlike traditional paper, which starts to yellow and decay over time when exposed to light or heat.

The agency has also built sapphire discs, made out of sapphire and etched with platinum on one side. These can contain up to 40,000 pages of pictures and text and could, theoretically, last for some two million years.   Language, after all, is a living, changing entity. That’s why it took us decades to decode Egyptian hieroglyphs and why you might have gotten a headache reading Shakespeare’s Old English masterpieces in class. So who’s to say that French scientists 1,000 years from now will be able to understand la langue de Moliere’s current form?  The OECD’s Nuclear Energy Agency (NEA) has since created a working group whose task it is to set the best practices on Radioactive Waste Repository Metadata Management so that all the information is not only stored properly but is also easily accessible as national nuclear waste programmes evolve…

In a report, the researchers led by Thomas Sebeok of the University of Indiana recommended the creation of a nuclear priesthood, inspired by the Catholic Church, which would relay information down the generations through “a mixture of iconic, indexical and symbolic elements” and “a high degree of redundancy of messages.”..

The problem with art, explained Peter Galison, professor of the History of Science and of Physics at Harvard University and author of the Containment documentary, is that if a message is too artistic, then it might not be properly understood as different people may have different interpretations of it….For instance, you know for sure what the skull pictogram means. If you’re thinking death, you’re right. Yet this symbol, Blanquer said, “comes from alchemists.”  “The skull represents Adam and the crossing bones the promise of resurrection,” he revealed. So in the span of just a few centuries this particular pictogram has evolved from meaning resurrection to meaning death.

As waste can be buried either near or deep under the surface, the signal should be seen both above but also under the ground. The researchers employed by the US Department of Energy in the mid-1980s (who came up with the nuclear priesthood, remember!), had also envisioned different monuments to get the point across: fields of pikes, threatening statues of thunderbolts, or enormous blocs of granite positioned into a tight grid….
The Finnish project of Onkalo took the problem completely differently: what if we came up with a way that would allow us to simply not tell future generations?  Its solution? Digging a deep geological repository for spent nuclear fuel.  “The entire concept of Posiva (the company which manages the project), is that 100 to 120 years after it’s been closed, the site will not be signalled. The 500 meters to the storage site in the geological layer will be filled with rock and the entire thing will be isolated and invisible in the natural landscape.”

Excerpts from What will a nuclear waste warning look like in 100,000 years’ time?, Euronews, Nov. 16, 2018

Nuclear Waste Above Sea Level: Pilgrim

Pilgrim Nuclear Power Station (PNPS) is the only nuclear power plant operating in Massachusetts. …On October 13, 2015, plant owners announced that it would close by June 1, 2019, citing “market conditions and increased costs,” which would have included tens of millions of dollars of necessary safety upgrades.

Up to 2015,all of the nuclear reactor fuel rods from the Pilgrim Nuclear Power Station were submerged in a deep pool of water, which was running out of space.  In 2015, the company started to use casks to store the waste. Cask storage is used at many nuclear plants in the United States to deal with excess nuclear reactor waste. The casks, 18 feet tall and 11 feet wide, are designed to withstand a truck bomb or a tornado-borne projectile moving at 360 miles per hour.

The plant in 2018 had 17 steel-reinforced concrete cylinders filled with the radioactive waste on a concrete pad about 25 feet above sea level and about 200 feet from shore.  It announced it was planning to move these 360,000-pound casks to a new pad on an existing parking lot that’s about 75 feet above mean sea level and 700 feet from shore to avoid risks associated with sea-level rise due to climate change.