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Switzerland seeks to bury radioactive waste

  • By Al Mayadeen Net
  • Source: Agencies
  • 9 Apr 2022 10:22
  • 1 Shares
4 Min Read

Switzerland hopes to join an elite club of countries closing in on deep geological storage.

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  • Switzerland will have to bury a projected 83,000 cubic meters of radioactive waste
    Switzerland will have to bury a projected 83,000 cubic meters of radioactive wasteز

The Mont Terri international laboratory in Switzerland was built to study the effects of burying radioactive waste in clay that sits 300 meters (985 feet) below the surface near Saint-Ursanne in the northwestern Jura region.

The underground laboratory stretches across 1.2 kilometers (0.7 miles) of tunnels. Niches along the way, each around five meters high, are filled with various storage simulations, containing small quantities of radioactive material monitored by thousands of sensors.

More than 170 experiments have been carried out to simulate the different phases of the process -- positioning the waste, sealing off the tunnels, surveillance -- and to reproduce every imaginable physical and chemical effect.

According to experts, it takes 200,000 years for the radioactivity in the most toxic waste to return to natural levels.

Geologist Christophe Nussbaum, who heads the laboratory, explained that researchers wanted to determine what the possible effects could be "on storage that needs to last for nearly one million years."

That "is the duration that we need to ensure safe confinement," he noted, adding that so far, "the results are positive."

Final decision in 2029

Three prospective sites in the northeast, near the German border, have been identified to receive such radioactive waste. 

Switzerland's nuclear plant operators are expected to choose their preferred option in September.

The Swiss government is not due to make the final decision until 2029, but that is unlikely to be the last word as the issue would probably go to a referendum.

Switzerland moving too fast

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Despite the drawn-out process, environmental campaigners Greenpeace say Switzerland is moving too fast.

"There are a myriad of technical questions that have not been resolved," Florian Kasser, in charge of nuclear issues for the environmental activist group, told AFP.

He said it remains to be seen if the systems in place can "guarantee there will be no radioactive leakage in 100, 1,000 or 100,000 years."

Kasser emphasized that Switzerland also needed to consider how it will signal the sites' location to ensure they are not forgotten, and that people many centuries from now remain aware of the dangers.

More than half a century of pumping out radioactive waste

Swiss nuclear power plants have been pumping out radioactive waste for more than half a century.

Until now, it has been handled by the National Cooperative for the Disposal of Radioactive Waste, or NAGRA, founded in 1972 by the plant operators in conjunction with the state.

For now, the waste is being stored in an "intermediary depot" in Wurenlingen, some 15 kilometers from the German border.

83,000 cubic meters to be buried

Switzerland hopes to join an elite club of countries closing in on deep geological storage.

So far, only Finland has built a site, in granite, and Sweden gave the green light in January to build its own site for burying spent nuclear fuel in granite. 

Switzerland will have to bury a projected 83,000 cubic meters of radioactive waste, including some high activity waste.

This volume corresponds to a 60-year operating life of the Beznau, Gosgen, and Leibstadt nuclear power plants, and the 47 years that Muhleberg was in operation before closing in 2019.

"Project of the century"

Filling in the underground nuclear waste tombs should begin by 2060.

"It's the project of the century: we have carried out the scientific research for 50 years, and we now have 50 years for the authorisation and the realisation of the project," expressed Nagra Spokesperson Felix Glauser.

The monitoring period will span several decades before the site is sealed sometime in the 22nd century.

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