Development of a coupled neutron / photon transport mode in the serpent 2 Monte Carlo code
Development of a coupled neutron / photon transport mode in the serpent 2 Monte Carlo code
复制标题
Serpent 2 蒙特卡罗代码中耦合中子/光子传输模式的开发
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
M. Metsälä
中科院分区：
文献类型：
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作者：
J. Leppänen;T. Kaltiaisenaho;V. Valtavirta;M. Metsälä
本文介绍了蛇形2号蒙特卡罗程序中中子/光子耦合输运模式的早期发展。该方法包括利用ACE格式截面库中的ENDF反应抽样定律，产生中子相互作用中发射的瞬发次级伽马。新的传输模式主要是为了在多物理模拟中考虑伽马加热的影响而开发的。其他潜在的应用包括辐射屏蔽和聚变中子学。这项工作仍在进行中，在撰写本文时，蛇形2号的分布式版本缺乏同时传输中子和次级光子的能力。相反，通过将模拟分成两部分来测试和演示该方法，并将结果与参考MCNP计算进行比较。测试案例包括一个简单的扫帚问题，用于比较光子发射光谱，以及无限沸水堆燃料晶格中的伽马通量和加热计算。
This paper presents the early development of a coupled neutron / photon transport mode in the Serpent 2 Monte Carlo code. The methodology covers the production of prompt secondary gammas emitted in neutron interactions, using the ENDF reaction sampling laws in ACE format cross section libraries. The new transport mode is developed mainly to account for the effect of gamma heating in multi-physics simulations. Other potential applications include radiation shielding and fusion neutronics. The work is still under way, and at the time of this writing the distributed version of Serpent 2 lacks the capability to transport both neutrons and secondary photons simultaneously. The methodology is instead tested and demonstrated by dividing the simulation in two parts, and the results are compared to reference MCNP calculations. The test cases include a simple broomstick problem for the comparison of photon emission spectra, and gamma flux and heating calculations in an infinite BWR fuel lattice.