压水堆二回路蒸汽外供工业应用的辐射防护探讨  

Discussion on radiation protection for PWR second-loop steam supply for industrial application

作　　者：庄亚平 刘维理 方圆 吴放 缪正强 ZHUANG Yaping;LIU Weili;FANG Yuan;WU Fang;MIAO Zhengqiang(Shandong Nuclear Power Company Co.Ltd.,Shandong Yantai 265116;Nuclear and Radiation Safety Center,MEE,Beijing 100082)

机构地区：[1]山东核电有限公司,山东烟台265116 [2]生态环境部核与辐射安全中心,北京100082

出　　处：《辐射防护》2024年第4期410-415,共6页Radiation Protection

摘　　要：核电机组具备提供大规模、稳定的工业蒸汽的能力。实验室测量表明,蒸汽发生器传热管无泄漏情况下,二回路蒸汽凝结水中除氚外的放射性核素的活度浓度与环境水样没有差异。本文参考饮用水标准,建议将二回路蒸汽工业应用的放射性核素管理目标值设定为3.0 Bq/kg;在蒸汽发生器排污管线上增设高灵敏度辐射监测仪,对主蒸汽管道N-16辐射监测通道进行技术改造,从而对蒸汽发生器传热管泄漏进行及时、有效及可靠的监测,与外供蒸汽管道出厂区边界的控制阀连锁,避免在运行和事故工况下放射性核素通过供汽管道排出厂区。Nuclear power reactor units have the ability to provide large-scale,stable industrial steam.Laboratory measurements show that,under the condition of no leakage in the heat transfer tube of the steam generator,the concentration of radionuclides in the condensed water of the second-loop steam is not different from that in the environmental water sample except for tritium.Based on the drinking water standard,this article proposes to control the target value of radionuclide management for industrial application of second-loop steam at 3.0 Bq/kg;A high-sensitivity radiation monitor was set up on the steam generator drainage pipeline and technical renovation on the main steam pipeline N-16 radiation monitoring channel was carried out,with the aim to provide timely,effective,and reliable monitoring of steam generator heat transfer tube leakage.It is interlocked with the control valve of the external steam supply pipeline at the factory boundary to prevent radionuclides from leakaging outside the factory area through the steam supply pipeline during operation and accident conditions.

关 键 词：压水堆 工业蒸汽 泄漏监测 氚 

分 类 号：TL75[核科学技术—辐射防护及环境保护]