Spent Fuel

Composition of Spent Fuel

The fuel in modern nuclear power plants is enriched to 3-5% U-235 (which is the isotope that undergoes fission). Therefore we might expect that spent fuel contains roughly 3-5% fission products. It is a bit more complicated than this which I will go into in this blog. Despite the small percentage of fission products in […]

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Implications of High Burnup Fuel – Basic Notes

An important issue around nuclear new build is the amount and what happens to the spent fuel. The proposed EPR reactors at Sizewell and Hinkley are designed to run oh ‘high burnup’ fuel. This post has a basic look at what the implications are. This is a rough wordy explanation and I hope to be […]

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Spent Fuel – Basic Notes

These are just a few basic notes about spent fuel waste from nuclear power stations. It assumes a basic understanding of the nuclear fission process (see Basic Nuclear Physics workshop), however, I have tried to provide links to the relevant sections within this blog. This post is designed as a basic introduction for the discussion […]

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Uranium Enrichment Formula

This is another one of those background information posts deriving the mass balances for uranium enrichment. Let us consider the following enrichment  scenario: We have mass F of unenriched uranium entering on the left. It has Nf of U-235 (0.72% for natural uranium). After enrichment mass P of product enriched to Np of U-235 and […]

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3500 Tonnes of Spent Fuel may be produced by Sizewell C

I previously did a rough calculation about the amount of spent fuel waste that is going to be generated by Sizewell B (see Spent Fuel At Sizewell B). This is my calculation of the amount of spent fuel at Sizewell C if it goes ahead. The waste will be stored at Sizewell until it is […]

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US Legal Challenge to Onsite Waste Storage

A Federal Appeal Court in the USA has ruled that nuclear regulators did not fully assess the risks associated with allowing utilities to store their spent fuel onsite for decades longer than originally intended. SENTELLE, Chief Judge: Four states, an Indian community, and a number of environmental groups petition this Court for review of a […]

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Over 1000 Tonnes of Nuclear Waste To Be Stored At Sizewell B

Over 1000[1] Tonnes of Nuclear Waste To Be Stored At Sizewell B Despite over 60 years of producing highly radioactive waste we still have no way of disposing of it. The waste from nuclear plants such as Sizewell B was originally intended to be sent to Sellafield for reprocessing or processing for long term disposal. […]

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Spent Fuel At Sizewell B

This is my calculation of the amount of spent fuel at Sizewell B. It is not that accurate (estimate 20% either side) but should give us a rough idea   Electrical Output 1258 MWe Wikipedia gives 62MW used internally. However this figure gives 67MW since BE state power rating at 1191 Thermal Efficency 36.5% Thermal […]

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