压水堆次临界状态下反应性测量的理论修正分析与试验初步探讨  

Theoretical Correction and Experimental Study of the Reactivity Measurement under Sub-critical Conditions of Pressurized Water Reactor

作　　者：谭世杰[1] 李志军 洪志强 胡汝平 TAN Shijie;LI Zhijun;HONG Zhiqiang;HU Ruping(Daya Bay Nuclear Power Operation and Management Co.,Ltd.,Shenzhen of Guangdong Prov.518124,China;China Nuclear Power Technology Research Institute,Shenzhen of Guangdong Prov.518124,China;Liaoning Hongyanhe Nuclear Power Co.,Ltd.,Dalian of Liaoning Prov.116302,China)

机构地区：[1]大亚湾核电运营管理有限责任公司,广东深圳518124 [2]中广核研究院有限公司,广东深圳518124 [3]辽宁红沿河核电有限公司,辽宁大连116302

出　　处：《核科学与工程》2021年第4期675-681,共7页Nuclear Science and Engineering

摘　　要：压水堆在次临界下进行反应性测量,需要对简化点堆模型给出的次临界增值公式进行较复杂的修正,包括空间效应的修正、探测器的响应修正等。从中子输运方程出发,分析推导出了次临界增值公式的修正因子。通过次临界状态下提棒过程中堆外探测器的响应数据,对空间修正因子在相同/不同燃料管理模式、有/无外中子源的情况作了分析与探讨。次临界增值公式的空间修正因子计算较为复杂且难以避免与要测量的反应性之间的解耦性问题,但具有二次中子源的堆芯空间修正因子在数值上与同一燃料管理模式下的其他循环的修正因子相近,可作为计算的参考。结合理论修正及初步的试验数据,对在压水堆上实施次临界状态下的反应性测量提出了实施的方向与建议。To perform the PWR reactivity measurement under subcritical conditions,it is necessary to make complicated corrections to the subcritical formula given by the simplified point kinetic approximation,including correction of spatial effects and response correction of detectors. This paper derives the correction factor from the neutron transport equation. Through experimental study, the data of the spatial correction factor in the same/different fuel management strategy and the presence/absence of the external neutron source are analyzed, and some suggestions for the implementation of the subcritical reactivity measurement state are proposed.

关 键 词：次临界 反应性测量 空间效应 二次中子源 控制棒价值 次临界刻棒 

分 类 号：TL63[核科学技术—核技术及应用]