Production of Long-Lived Radionuclides in CMS

We discuss the production of radionuclides which are of significance when assessing the amount of radioactive material to be deposited or recycled after decommissioning of CMS. Our estimate is based on a detailed accounting for each individual radionuclide and accurate follow-up of the time dependence of the activity. Compared to a previous study using crude parametrizations the new results indicate significantly lower amounts of radioactive material. According to the new estimate the amount of active ( > 1 Bq/g) material from CMS, 30 years after LHC shutdown, will be 150 tons. Only the collimators, none of the CMS proper, will fall into the >100 Bq/g category after 30 years of cooling.