Radiation Conditions during the Preparation of Irradiated BOR-60 Fuel Assemblies for Reprocessing

The basic stages in the preparation of irradiated BOR-60 reactor fuel for reprocessing are examined. It is determined that during the separation of the fuel part of the fuel elements the coefficient of transfer of super(137)Cs from the fuel into aerosol is 5.10 super(-6) and for fragmentation the value is 3.10 super(-5). It is found that the real catching efficiency for aerosol particles caught by a V-05 filter ranges from 42 to 99%. The specific entry of radioactive aerosols into the ventillation center after the first stage of air purification was 0.3 MBq for a-emitters and 7.7 MBq for b and g emitters per 1 kg of reprocessed fuel. The total collective dose formed at the stages of preparation of a large batch of irradiated fuel (four spent fuel asemblies with average burnup 11.4% and a 10.5 to 23.7 yr holding period) for reprocessing was 11.5.10 super(-3) persons.Sv.