Exposure control strategy adopted during refurbishment of Rajasthan Atomic Power Station, Unit-2

Rajasthan Atomic Power Station (RAPS) consists of two units of 220 MWe PHWR type of reactors having 306 horizontal coolant channels. The en masse coolant channel replacement (EMCCR) of RAPS-2 was a unique operation done on any Indian PHWR. Highly active in-core components removed were effectively contained in shielding flasks and disposed off at Solid Waste Management Plant (SWAMP). In view of very high intensity of non-uniform radiation field emanating from the channels, control of external exposures to the working personnel became the main focus of attraction during the entire campaign. Mock-up facilities were established and workers were trained and qualified for working in high active areas