研究性重水反应堆厂房外环境中子、γ剂量当量率的测定

DETERMINATION OF n,γ DOSE EQUIVALENT RATE AROUND THE BUILDING OF HWRR

测量了中国原子能科学研究院研究性重水反应堆厂房外周围环境中的中子、γ剂量当量率分布。反应堆在13MW热功率下运行时,其厂房外周围马路的平均中子剂量当量率达5.2nSv·h^(-1),约为天然中子本底的1.6倍;平均γ剂量当量率(不包括高剂量区的西马路数据)达124nSv·h^(-1),约为γ本底的1.3倍。还分析了反应堆厂房外西马路γ剂量率偏高的原因。

The dose equivalent rate distribution of n, γ radiation around the building ofHWRR is measured. During the reactor operating at 13 MW, the average neutrondose equivalent rate on the road around the building amount to 5.2 nSv.h^(-1), it isabout 1. 6 times larger than natural neutron background; the mean (except fromlocal points on west road) γ dose equivalent rate is equal to 124 nSv.h^(-1), it isabout 1.3 times as large as γ background. The reason of higher γ dose rate on west road is analysised.