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首页> 外文期刊>Romanian reports in physics >NEUTRONIC CALCULATION SYSTEM FOR CANDU CORE BASED ON TRANSPORT METHODS
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NEUTRONIC CALCULATION SYSTEM FOR CANDU CORE BASED ON TRANSPORT METHODS

机译：基于运输方法的坎杜核中子计算系统

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摘要

This paper is intended to highlight a global neutronic calculation system by using it to estimate the neutronic effect of the adjuster rod system insertion in the CANDU Standard core. The calculation system W1MS PIJXYZLEGENTR is based on transport methods and was developed in the Institute for Nuclear Research Pitesti. By using only transport codes the mentioned multigroup calculation system is both coherent and consistent. In the same time, it allows a good representation both for CANDU cell/supercell and core. These conditions are compulsory in the CANDU reactor core types, for solving the problems which arise from the strong heterogeneities mainly due to the perpendicular insertion of the reactivity/control devices by the fuel channels. Herein this calculation system is used for performing the global neutronic parameters for a CANDU reactor core which has the adjuster rod system inserted. More exactly, a CANDU Standard core with fresh fuel at nominal power is taken into consideration. To emphasize this calculation system a comparative analysis of its performed results obtained in two calculation ways: using the macroscopic cross sections homogenized on each cell (the homogenized case) and with the cross sections for each material (the heterogeneous case). Also it is made a comparison with the similar ones obtained with the WIMSPIJXYZDIREN calculation system, where the macroscopic cross section are homogenized on each cell. The comparative analysis shows a good agreement between these estimated results.
机译：本文旨在通过估计全球调节棒系统插入CANDU标准堆芯中的调节杆系统的中子效应来重点介绍该系统。 W1MS PIJXYZLEGENTR计算系统基于运输方法，是在皮特什蒂核研究所开发的。通过仅使用传输码，提到的多组计算系统既一致又一致。同时，它可以很好地代表CANDU单元/超级单元和核心。在CANDU反应堆堆芯类型中，这些条件是强制性的，用于解决主要由于燃料通道垂直插入反应性/控制装置而导致的强烈异质性所引起的问题。在此，该计算系统用于对插入了调节杆系统的CANDU反应堆堆芯执行全局中子参数。更准确地说，考虑了以公称功率提供新鲜燃料的CANDU标准堆芯。为了强调此计算系统，对通过两种计算方式获得的执行结果进行了比较分析：使用在每个单元上均化的宏观横截面（均化的情况）和使用每种材料的均化横截面（异质的情况）。还与通过WIMSPIJXYZDIREN计算系统获得的相似结果进行了比较，在该系统中，宏观截面在每个单元上均化。比较分析表明，这些估计结果之间有很好的一致性。

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