第32卷
第2期
2012年
6月
核科学与工程
Nuclear Science and Engineering
瞬发和缓发射线对堆内构件
释热率影响的研究
苏耿华，石秀安，蔡德昌，李
串
(中科华核电技术研究院，广东深圳518026）
Vol.32
2No.2 Jun.2012
摘要：为提高核电设计中反应堆堆内构件释热率计算的准确性，本文在原来MCNP外中子源模型计算方法的基础上，计算分析联发裂变？对堆内构件释热率的贡献。计算结果显示，考患股发裂变了使得增内构件的释热率增加9%～38%，离堆芯越近的堆内构件的增加值越大。另外，分析认为缓发对堆内构件释热率的贡献与瞬发裂变相当。因而反应堆堆内构件释热率计算中除了考虑中子及中子俘获所
生的贡献，还应该考虑瞬发裂变和缓发的贡款。关键调：堆内构件释热率；膜发裂变射线；缓发了射线
中图分类号：TL32
文章标志码：A
文章编号：0258-0918(2012)02-0150-06
Studyontheinfluenceofpromptfission-rayand delayed-rayonreactorinternalsheatingrate
SU Geng-hua, SHI Xiu-an, CAI De-chang, LI Le
(China Nuclear Power Technology Research Institute, Shenzhen of Guangdong Prov, 518026, Chins)
Abstract: To improve the accuracy of the calculated reactor internals heating rate in the design of nuclear power plants, this paper studied the contribution of prompt fission to the reactor internals heating rate based on the original method of MCNP external neutron source model. The results revealed that the reactor internals heating rate increased by 9%~38% with prompt fission taken into account and the internals nearer to the core had a lager increment. In addition, it is believed after analysis that the contribution of the delayed on reactor internals heating rate is similar to the prompt fission . Therefore, when calculating reactor internals heating rate, in addition to the neutron source and neutron capture , prompt fission and delayed should also be considered.
Key words: reactor internals heating rate; prompt fission -ray; delayed -ray 收稿日期：2011-07-12，修图日期：2011-11-28
作者简介：苏取华（1985-），男，福建人，助理工程师，碳土，现主要从事反应堆源项和屏鼓方函的研究设计工作 150