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首页> 外文会议>International conference on mathematics, computational methods reactor physics;MC 2009 >NEUTRON RESPONSE OF SILICON CARBIDE SEMICONDUCTOR DETECTORS FROM DETERMINISTIC ADJOINT TRANSPORT CALCULATIONS
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NEUTRON RESPONSE OF SILICON CARBIDE SEMICONDUCTOR DETECTORS FROM DETERMINISTIC ADJOINT TRANSPORT CALCULATIONS

机译：确定性伴随运输计算中碳化硅半导体探测器的中子响应

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摘要

Evaluation of silicon carbide (SiC) semiconductor detectors for use in power monitoring is of significant interest because of their distinct advantages, including small size, small mass, and their inactivity both chemically and neutronically. The main focus of this paper includes evaluating the predicted response of a SiC detector when placed in a 17×17 Westinghouse PWR assembly, using the PENTRAN code system for the 3-D deterministic adjoint transport computations. Adjoint transport results indicated maximum adjoint values of 1, 0.507 and 0.308 were obtained for the thermal, epithermal and fast neutron energy groups, respectively. Within a radial distance of 6.08 cm from the SiC detector, local fuel pins contribute 75.33% at this radius within the thermal group response. A total of 35.85% of the response in the epithermal group is accounted for in the same 6.08 cm radius; similarly, 21.58% of the fast group response is accounted for in the same radius. This means that for neutrons, the effective monitoring range of the SiC detectors is on the order of five fuel pins away from the detector; pins outside this range in the fuel lattice are minimally "seen" by the SiC detector.
机译：碳化硅（SiC）半导体探测器在功率监测中的应用具有很大的优势，包括体积小，质量轻，并且在化学和中子学上都具有惰性，因此，对功率探测器的评估引起了广泛的关注。本文的主要重点包括使用PENTRAN代码系统进行3-D确定性伴随输运计算时，评估放置在17×17 Westinghouse PWR组件中的SiC检测器的预测响应。伴随输运结果表明，热，超热和快中子能级分别获得最大伴随值1、0.507和0.308。在距SiC检测器6.08 cm的径向距离内，局部燃料销在热组响应范围内的该半径处占75.33％。在相同的6.08 cm半径内，超热组的响应总数为35.85％。同样，在相同的半径范围内，有21.58％的快速群体反应在其中。这意味着对于中子来说，SiC探测器的有效监视范围约为远离探测器的五个燃料销。 SiC探测器可以最小程度地“看到”燃料晶格中超出此范围的引脚。

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