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首页> 美国政府科技报告 >Power Distribution Unfolding on the Basis of in-Core Rhodium Powered Detector Readings. Final Report for the Period 1 November 1985 - 31 January 1988
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Power Distribution Unfolding on the Basis of in-Core Rhodium Powered Detector Readings. Final Report for the Period 1 November 1985 - 31 January 1988

机译：基于核心铑动力探测器读数的配电展开。 1985年11月1日至1988年1月31日期间的最后报告

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The task of unfolding of core power distribution for WWER reactors consists of processing of Self Powered Neutron Detector measurements to obtain estimated values for the uninstrumented assemblies. The method described in the report relies on 3-D power distributions calculated with BIPR-5 code and adjusted to instrumented assemblies to reproduce SPND measurements. The multiplicative modifying function is used for this purpose. Earlier a simple method was proposed and evaluated, in which measured power densities served as internal boundary conditions in the BIPR-5 calculations of the 3-D distributions for the entire core. Both methods have been tested using data from Loviisa-1 reactor core, consisting of 349 hexagonal fuel assemblies, each 14.7 cm across and 250 cm in length (active length). The SPNDs were placed on 4 levels: 50, 100, 150, 200 cm above the bottom of reactor core in 36 instrumented assemblies. Refs, figs and tabs. (Atomindex citation 20:016467)

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