秦山三期CANDU-6型重水堆中,为了生产工业和医用60Co源,采用钴调节棒替换不锈钢调节棒.钴棒由于受到中子及γ射线照射产生热量,此外,59Co被活化变成60Co,而60Co衰变放出的射线被调节棒自身吸收也会产生热量.因此,有必要研究钴调节棒的发热变化,为进一步分析钴调节棒的温度场及慢化剂的热负荷提供设计输入.本工作采用MCNP程序模拟秦山三期CANDU-6型重水堆的全堆芯(包括燃料、控制棒、调节棒、冷却剂和慢化剂等)几何结构,研究不锈钢调节棒和钴调节棒的发热率.将基于上述钴调节棒计算结果的最大发热率提供给热工进行稳态和事故分析,确保反应堆热工安全性.%In order to produce 60Co source for industry and medicine applications in CAN-DU-6 reactor, the stainless steel adjusters were replaced with the cobalt adjusters. The cobalt rod will generate the heat when it is irradiated by neutron and y ray. In addition, 59 Co will be activated and become 60Co, the ray released due to 60Co decay will be absorbed by adjusters, and then the adjusters will also generate the heat. So the heating rate of adjusters to be changed during normal operation must be studied, which will be provided as the input data for analyzing the temperature field of cobalt adjusters and the relative heat load of moderator. MCNP code was used to simulate whole core geometric configuration in detail, including reactor fuel, control rod, adjuster, coolant and moderator, and to analyze the heating rate of the stainless steel adjusters and the cobalt adjusters. The maximum heating rate of different cobalt adjuster based on above results will be provided for the steady thermal hydraulic and accident analysis, and make sure that the reactor is safe on the thermal hydraulic.
展开▼
