摘要
为对压水堆一回路源项进行准确分析,在研究了美国核管制委员会(Nuclear Regulatory Commission,NRC)发布的计算气体裂变产物释放产生比(Release to Birth Ratio,R/B)的ANSI/ANS-5.4标准及法国METEOR 1.5程序计算气体裂变产物释放产生比的方法后,分别利用几种方法计算了燃料棒在不同功率水平以及不同燃耗下的几种气体裂变产物的释放产生比,对几种方法进行了研究分析。结果表明,燃料棒的裂变产物释放产生比会随着其功率以及燃耗而增大,相较于美国ANSI/ANS-5.4-2011标准,法国METEOR 1.5程序方法更为保守,而NRC原有的ANSI/ANS-5.4-1982标准最为保守,计算出的释放产生比最大,ANSI/ANS-5.4-2011标准能较好地适用于压水堆核电站裂变产物释放份额的计算。
Background： A large quantity of fission products would be produced when the nuclear reactor runs. These fission products would be released to the pellet-rod gap and then to the primary circuit while the fuel rod is broken. The fission products in the primary circuit become the main source term of the reactor. Purpose： This study aims to analysis the source term accurately by calculating the release to birth ratio （RBR） of volatile fission products precisely. Methods： After researching American NRC ANSI/ANS-5.4 methods and French methods for calculating the RBR of volatile fission products, we calculated the RBR of volatile fission products of a fuel rod at different power and different burn-up by these methods, and made some comparison and analysis of these results. Results： Computation results showed that the RBR of volatile fission products would increase with the power and burn-up of the fuel rod. Compared with the ANSI/ANS-5.4-2011, the French method is more conservative whilst the ANSI/ANS-5.4-1982 is the most conservative among these methods. Conclusion： ANSI/ANS-5.4-2011 is the best method among these three methods and it can be used to calculate the release to birth ratio of volatile fission products with good results.
出处
《核技术》
CAS
CSCD
北大核心
2015年第4期85-89,共5页
Nuclear Techniques
基金
国家自然科学基金(No.11175118)
上海市教育委员会科研创新项目(No.12ZZ022)资助
