Improvements in the methods for optimising dose rate CTOR NPPs in the Russian Federation

The paper describes the results of a model investigation and an occupational radiation exposure analysis for reducing the collective doses on LWGMR nuclear power plants.

The first RBMK NPP had been commissioned more than twenty years ago. It was the new generation unit of the light Water Graphite Moderated Reactor (LWGMR). The RBMK-1000 occupational exposures were the same as or smaller than BWR doses. For example in 1980 - 1983 US BWR collective doses were

12.30 -10.17 man-Svper unit-year [1] and the equivalent RBMK-1000 were 5.00 - 9.05 man-Sv per unit-year.

A new generation of LWGMR, the MKER-800, is currently at the design stage and the design target for the plant is 1.0 man-Sv per GW(e)-year.