辐射研究与辐射工艺学报2025，Vol.43Issue(5)：109-115,7.DOI:10.11889/j.1000-3436.2025-0033
VVER型压水堆机组110mAg辐射源项的控制策略与实践应用
Control strategies and practical applications for 110mAg radiation source term in VVER-type pressurized water reactor units
摘要
Abstract
During the operation of nuclear power plants,various radiation source terms are generated,primarily fission products and activated corrosion products,which significantly influence the radiation field within the plant.After controlling 58Co and 60Co,110mAg has emerged as the primary contributor to the radiation field following the shutdown of certain nuclear power plants.As a high-radiation nuclide,110mAg plays a significant role in the radiation field,accounting for 10%-15%of the collective dose.This paper analyzes the radiation impact and morphological changes of 110mAg.By examining its variation trend of 110mAg during the shutdown period of water-water high-energy reactor(VVER)-type units,concluded that the morphology of 110mAg began to transform into an ionic state and is released in large quantities after nitrogen purging and unsealing of the primary circuit.At this stage,a new purification process was proposed and implemented.This process does not rely on the operation of the main pump but instead integrates multiple auxiliary systems to effectively control the 110mAg source term,significantly reducing its impact.Consequently,the purification efficiency of 110mAg in the primary circuit reached 91.6%,the reactor building's radiation index decreased by 40%-60%,and the collective dose during major overhauls was reduced by approximately 50 man·mSv.These findings offer a valuable reference for similar nuclear units.关键词
水-水高能反应堆/辐射源项/110mAg/净化工艺Key words
Water-water high-energy reactor/Radiation source/110mAg/Purification process分类
能源科技引用本文复制引用
邸明乐,李中华,赵喜寰,陈全利..VVER型压水堆机组110mAg辐射源项的控制策略与实践应用[J].辐射研究与辐射工艺学报,2025,43(5):109-115,7.
