核电厂堆芯物理试验功率亏损和功率系数项目的探讨

Studying of Power Defect and Power Coefficient in Reactor Core Physics Tests of NPP

核电厂首次临界和后续燃料循环都需要进行一系列的试验,其中包括堆芯物理试验,目的是验证堆芯设计计算的正确性。国内压水堆核电厂物理试验由于堆型差异,存在多种堆芯物理试验管理文件。目前,国家核安全局(NNSA)的审评参照法国体系,将堆芯物理试验的文件(堆芯物理试验监督要求GORX)作为最终安全分析报告(FSAR)技术规格书的一部分。其中,关于堆芯物理试验中功率亏损和功率系数项目,是否需要包括在该文件中,目前有一些争议,本文将从技术角度以及国内外法规标准体系探讨该试验项目的必要性,另外对其测量方法进行讨论。

A series of tests is necessary to perform in the first critical and subsequent nuclear fuel cycle of nuclear power plant （NPP） . In these tests the core physics tests are to testify the core design calculation. Taking account of NPP reactor difference in China there are kinds of core physics test management files. At present, core physics test file （core physics test surveillance program GORX） is already defined as one part of technical specification in FSAR, as similar with France. Herein there are some controversies whether the power defect and power coefficient need to be included in GORX or not. Based on technical issue as well as domestic and abroad standard regulations this point is studied, moreover its measurement method is discussed, in this paper.