华龙一号活化腐蚀产物沉积源项评估

Assessment of deposit source term of activated corrosion products for HPR1000 nuclear power plants

根据国内外核电厂主管道上沉积源项的运行经验数据,分析了两种主要核素Co-58和Co-60的沉积活度随电厂运行时间的变化趋势。在此基础上,采用一回路活化腐蚀产物源项计算软件预估了华龙一号的活化腐蚀产物沉积源项。在参考国内广泛运行的M310机型设计源项确定方法的基础上,分析给出了华龙一号活化腐蚀产物沉积源项的设计源项和现实源项,并与国内二代核电机组和国际三代核电机组进行对比,结果显示三者均处于同一量级水平,华龙一号与国际三代核电机组相差不大,且优于国内二代核电机组。分析结果显示本文预估的沉积源项具有一定的可靠性,华龙一号核电机组在活化腐蚀产物源项控制方面具有一定的先进性。

Based on domestic and foreign experience data of deposit source terms on main pipes of nuclear power plants, the variation tendency of two main radionuclides Co - 58 and Co - 60 is analyzed. Furthermore, the deposit source term of activated corrosion products in primary loop of HPR1000 is assessed via a source term calculation software of activated corrosion products in primary loop, compared with those of the widely operated M310 type reactors in China. It is found that the control of deposit source term of HPR1000 is better than domestic generation II reactors and close to international generation III reactors, though the three of them are on the same magnitude.