Minimization of radiation risks from planned occupational exposure as in the case of nuclear legacy facilities liquidation

The model for minimizing lifetime radiation risk of death for people doing radiation hazardous work was developed. According to the model the optimal accommodation of the workers with high cumulative doses and high doses of possible occupational radiation exposure allows minimization of the risk. For these purposes the solution of a problem of linear integer programming (problem of allocation) was used. The developed model was applied to minimization of integrated lifetime risk of death from radiation associated cancer assessed for a team of workers, who withdrawn radioactive wastes from the storage at the Beloyarsk NPP. Due to developed plan of radiological protection optimization they managed to reduce the life-time radiation risks by 5-7 times. To solve the problem state-of-the-art models for radiation risks, methods for risks optimization, necessary for estimation of radiological danger were used. Due to corresponding constraints the developed method is a flexible tool applicable to optimization of radiation hazardous works practically at all nuclear power providers and operation procedures. We see it practicable to use the developed method for planning radiation hazardous operation procedures.