How can we achieve a sustainable nuclear fuel cycle?

Professor Laurence Harwood

nuclear waste storage at thorp
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What new technologies are being developed to minimise the long-term storage of spent nuclear fuels?

Nuclear power is very clean and carbon neutral. But spent nuclear fuel has a storage lifetime of 300,000 years.

Reprocessing of spent nuclear fuel is currently carried out on large scale using the“Plutonium Uranium Reduction and Extraction” (PUREX) process. The spent nuclear fuel is reduced to 15% of its original weight and the extracted uranium and plutonium are used as “Mixed Oxide Fuel”. This has been carried out at scale by the UK at Sellafield (now curtailed) and continues in France at La Hague.

The residual high-level waste has a storage lifetime of 9,000 years. Much of the remainder of the long-term radiotoxicity of the residual waste is due to traces (0.1%of the original fuel) of the minor actinides. Separation of these minor actinides from the chemically very similar lanthanides and other fission products is the next key step in the future reprocessing of spent nuclear fuel.

So what’s the challenge? The actinides can be used as a fuel in the next generation of nuclear reactors and converted into benign products. But the accompanying lanthanides would “poison” the reactor, causing it to shut down.

Laurence Harwood will report on the important progress that has been made in the advanced reprocessing of spent nuclear fuel. Waste nuclear fuel need not be a liability but a source of yet more power.

This event was originally due to take place in venue (only). It will now take place online.

professor laurence harwood

Professor Laurence Harwood

Laurence Harwood is Professor of Organic Chemistry at Reading University.  His researches focus on the development of new synthetic methods and their application to the synthesis of natural and unnatural products at the biological interface.  He is author or co-author of four textbooks including “Experimental Organic Chemistry” which has sold more than 30,000 copies worldwide.