Validation of PHITS Spallation Models from the Perspective of the Shielding Design of Transmutation Experimental Facility
Validation of PHITS Spallation Models from the Perspective of the Shielding Design of Transmutation Experimental Facility
复制标题
从嬗变实验装置屏蔽设计的角度验证PHITS散裂模型
DOI：
10.1051/epjconf/201715301016
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
S. Meigo
中科院分区：
文献类型：
--
作者：
H. Iwamoto;S. Meigo
研究了粒子输运代码PHITS中不同散裂模型对嬗变实验装置屏蔽设计的影响。对于400 mev质子在铅铋共晶靶上的入射，列日核内级联（INC） 4.6版模型（INCL4.6）与GEMcode （INCL4.6/GEM）耦合计算的厚辐射屏蔽（3 m厚铁和3 m厚混凝土）末端的有效剂量率约为Bertini INC模型（Bertini/GEM）的两倍。与厚铅靶上500 mev质子入射的实验数据对比表明，INCL4.6/GEM的预测精度优于Bertini/GEM。结果表明，INCL4.6/GEM计算的靶前束管内剂量率低于Bertini/GEM计算的剂量率。由于两种模型都低估了在180度处中子产生双微分截面的实验结果，对于140 mev质子入射碳、铁和金目标，得出的结论是，在估计中子流通过束管引起的剂量率时，有必要允许由散裂模型引起的不确定性余量，这是两个因素。
The impact of different spallation models implemented in the particle transport code PHITS on the shielding design of Transmutation Experimental Facility is investigated. For 400-MeV proton incident on a lead-bismuth eutectic target, an effective dose rate at the end of a thick radiation shield (3-m-thick iron and 3-m-thick concrete) calculated by the Liege intranuclear cascade (INC) model version 4.6 (INCL4.6) coupled with the GEMcode (INCL4.6/GEM) yields about twice as high as the Bertini INC model (Bertini/GEM). A comparison with experimental data for 500-MeV proton incident on a thick lead target suggest that the prediction accuracy of INCL4.6/GEM would be better than that of Bertini/GEM. In contrast, it is found that the dose rates in beam ducts in front of targets calculated by the INCL4.6/GEMare lower than those by the Bertini/GEM. Since both models underestimate the experimental results for neutron-production doubledifferential cross sections at 180◦ for 140-MeV proton incident on carbon, iron, and gold targets, it is concluded that it is necessary to allow a margin for uncertainty caused by the spallation models, which is a factor of two, in estimating the dose rate induced by neutron streaming through a beam duct.
影响因子：
1.2
作者：
Sato, Tatsuhiko;Niita, Koji;Sihver, Lembit
通讯作者：
Sihver, Lembit