核电厂控制棒价值测量评价方法改进研究

The Improvement of Evaluation Method on Bank Worth Measurement in Nuclear Plant

控制棒价值测量是核电厂物理试验的一项重要的内容。试验测量得到的棒价值需要与理论值进行比较,确保其偏差小于要求的限值。该试验不但验证堆芯满足核设计和技术规格书的要求,以保证安全分析结果的有效性。国内各压水堆电厂的大量试验数据表明,传统的控制棒计算方法得到的理论数据用于测量评价往往出现较大偏差。本文通过对传统的控制棒计算方法产生偏差的原因进行了研究,并对目前核电厂使用的两种主要的控制棒测量方法进行了分析,根据两种测量方法,分别进行了理论计算方法的改进。通过电厂实测数据对比验证,针对两种不同测量方法的评价方法改进可有效降低控制棒价值实测值与理论值的偏差。

Bank worth measurement is very important part in core physics test.In order to ensure the actual core is comply with the design and confirm the result of the safety analysis is valid,it is necessary that using the theoretical parameters to evaluate the measured results.A large number of test results from plats show that there are significant deviations between the measured results and the theoretical parameters which used traditional method.The paper studies the source of deviation of the theoretical and measured bank worth,analysis of the characteristics of two methods on bank worth measure in plants,and then given improves on theoretical calculation for each measure method.The test results of core physics tests show that those improvement are produce significant decrease on deviations between the measured and the theoretical results.