压水堆核电厂氧化运行^(58)Co峰值分析探讨  

Analysis and discussion of ^(58)Co peak of PWR nuclear power plant oxidation operation

作　　者：邓清泉 DENG Qingquan(Fujian Fuqing Nuclear Power Co.Ltd.,Fujian Fuqing 350318)

机构地区：[1]福建福清核电有限公司,福建福清350318

出　　处：《辐射防护》2025年第1期56-61,共6页Radiation Protection

摘　　要：某核电厂4号机组在第三循环换料大修期间实施氧化运行,期间一回路冷却剂中释放大量的活化腐蚀产物(其中^(58)Co峰值最高),对大修期间辐射防护和大修工期产生很大影响。本文结合4号机组第三燃料循环的运行条件,从腐蚀、迁移沉积、净化、活化和溶解等方面开展系统分析,总结出4号机组第三循环换料大修期间氧化运行^(58)Co峰值高的三个原因,同时对降低氧化运行58Co峰值、减少净化占用的大修工期,提出了相关建议。During the third cycle refueling overhaul of Unit 4 of a nuclear power plant,a large number of activated corrosion products(^(58)Co)was released in the primary coolant during the oxidation operation,which had a great impact on radiation protection and the duration of the overhaul.Taking into consideration with the operating conditions of the third fuel cycle of Unit 4,this paper carries out a systematic analysis from the aspects of corrosion,migration deposition,purification,activation and dissolution.This paper summarizes three reasons for the high peak value of 58Co in oxidation operation during the third cycle refueling overhaul of Unit 4.At the same time,relevant suggestions are put forward to reduce the peak value of ^(58)Co in oxidation operation and reduce the overhaul period occupied by purification process.

关 键 词：氧化运行 58Co峰值 PH值 腐蚀 

分 类 号：TL75[核科学技术—辐射防护及环境保护]