Question to the Department for Business, Energy and Industrial Strategy:

To ask the Secretary of State for Business, Energy and Industrial Strategy, how much plutonium nuclear waste has been stored in the UK in each of the last 10 years; and how much of that storing was done on behalf of other countries.

Nuclear fuel reprocessing separates spent nuclear fuel into uranium, plutonium and highly active waste products. Separated plutonium and uranium are not categorised as nuclear waste. Highly active waste products contain only trace amounts of plutonium.

Each year the Office for Nuclear Regulation publishes annual figures for holdings of civil unirradiated plutonium, including those owned by foreign bodies, on their website. The most recent figure is of 31 December 2016. (http://www.onr.org.uk/safeguards/civilplut16.htm)