I'm not sure what you're referring to, it's not typical to preserve isotopes during cleanup activities. The cleanup process mostly involves packaging contaminat

I'm not sure what you're referring to, it's not typical to preserve isotopes during cleanup activities. The cleanup process mostly involves packaging contaminated items to bury them. This process is dangerous and must be done with extensive protective equipment, which makes it very slow and time consuming. The isotopes involved here aren't useful anyway. We're talking about everything from gloves to concrete walls that have been contaminated with daughter products. What I think you're referring to is processing of spent fuel, which is a smaller item in these types of projects since the spent fuel is already packaged for storage. I'm not an expert on the UK situation but I wouldn't be surprised if spent fuel management is a tiny portion or not included in that estimate at all, it's usually already covered out of operating budgets.