基于严格两步法的停堆剂量率计算程序的基准分析

辐射防护 ›› 2023, Vol. 43 ›› Issue (S1): 20-24.

基于严格两步法的停堆剂量率计算程序的基准分析

张显¹, 刘仕倡¹, 卢棚², 张小康², 全国萍³, 陈义学¹

1.华北电力大学核科学与工程学院,北京 102206;
2.合肥综和性国家科学中心能源研究院(安徽省能源研究室),合肥 230031;
3.国家电投集团科学技术研究院有限公司,北京 102209

收稿日期:2022-12-04 出版日期:2023-08-15 发布日期:2023-09-14
通讯作者: 刘仕倡。E-mail:liu-sc@ncepu.edu.cn
作者简介:张显(1997—),男,2018年毕业于华北电力大学核工程与核技术专业,获学士学位,现为华北电力大学核科学与技术专业在读博士研究生。E-mail:zhxian97@163.com
基金资助:
国家自然科学基金资助项目(12175067);河北省自然科学基金(A2022502008);中央高校基本科研业务费专项资金(2022JG002)。

Benchmark analysis of shutdown dose rate calculation program based on R2S method

ZHANG Xian¹, LIU Shichang¹, LU Peng², ZHANG Xiaokang², QUAN Guoping³, CHEN Yixue¹

1. School of Nuclear Science and Engineering, North China Electric Power University, Beijing 102206;
2. Institute of Energy, Hefei Comprehensive National Science Center, Hefei 230031;
3. State Power Investment Corporation Science and Technology Research Co. Ltd., Beijing 102209

Received:2022-12-04 Online:2023-08-15 Published:2023-09-14

摘要/Abstract

摘要： 基于蒙卡程序cosRMC的网格计数功能,开发了以严格两步法为核心的停堆剂量率计算程序,通过耦合粒子输运计算和活化分析计算,精确求解停堆剂量场。其中,采用ALARA程序开展活化分析计算,将程序应用于ITER诊断窗口计算基准题上,开展了充分的计算分析,并与其他严格两步法程序计算得到的停堆剂量率结果有较好的一致性。另外,由于聚变装置几何十分复杂,结构网格难以准确描述几何结构,往往一个网格包含多个栅元,此时网格的通量平均对停堆剂量率的精度会带来不好的影响,而非结构网格具有良好的几何适应性,因此,基于非结构网格对停堆剂量率程序作了进一步开发,并在基准题上开展计算分析,验证了程序基于非结构网格计算停堆剂量率的可靠性。

关键词: 停堆剂量率, 严格两步法, cosRMC, ALARA, 非结构网格

Abstract: Based on the lattice counting function of the Monte Carlo program cosRMC, this paper developed a shutdown dose rate calculation program with a strict two-step method as the core. Through coupling particle transport calculation and activation analysis calculation, the shutdown dose field was accurately obtained. The ALARA program was used to carry out activation analysis and calculation. In this paper, the program is applied to the calculation benchmark of ITER diagnostic window, and a full calculation analysis is carried out, which is in good agreement with the shutdown dose rate results calculated by other programs. In order to improve the efficiency of particle transport calculation, the parallel calculation method and the global weight window variance reduction algorithm are applied in the program calculation. In addition, due to the fusion device geometry is complex, the lattice structure is difficult to accurately describe the geometric structure, a lattice often contains more than one cell, at this time of the lattice flux average to shut down the accuracy of dose rate will bring bad effect, rather than the lattice structure has a good adaptability, geometry, therefore, this work is based on unstructured lattice made further development program for shutdown dose rate, The reliability of the program for calculating shutdown dose rate based on unstructured lattice was verified.

Key words: shutdown dose rate, R2S method, cosRMC, ALARA, unstructured lattice

中图分类号:

TL38

张显, 刘仕倡, 卢棚, 张小康, 全国萍, 陈义学. 基于严格两步法的停堆剂量率计算程序的基准分析[J]. 辐射防护, 2023, 43(S1): 20-24.

ZHANG Xian, LIU Shichang, LU Peng, ZHANG Xiaokang, QUAN Guoping, CHEN Yixue. Benchmark analysis of shutdown dose rate calculation program based on R2S method[J]. RADIATION PROTECTION, 2023, 43(S1): 20-24.

参考文献 11

[1]	Loughlin M J, Batistoni P, et al. ITER nuclear analysis strategy and requirements[J]. Fusion Science and Technology,2009,56(2):566-572.
[2]	Subhash P V, Indauliya G, et al. Activation and radioactive waste analysis for survey X-ray crystal spectrometer of ITER[J]. Fusion Science and Technology, 2017,71(2):215-224.
[3]	Valenza D, Lida H, et al. Proposal of shutdown dose estimation method by Monte Carlo code[J]. Fusion Engineering and Design, 2001,55:411-418.
[4]	Chen Yixue, Fischer U. Rigorous MCNP based shutdown dose rate calculations: computational scheme verification calculations and application to ITER[J]. Fusion Engineering and Design, 2002,63-64:107-114.
[5]	Lu Peng, Fischer U, et al. Hybrid Monte Carlo approach for accurate and efficient shutdown dose rate calculation[J]. Fusion Engineering and Design,2018.
[6]	Wang Kan, Li Zeguang, et al. RMC-a Monte Carlo code for reactor core analysis[J]. Annals of Nuclear Energy,2015,82:121-129.
[7]	Wilson P P H. ALARA: Analytic and laplacian adaptive radioactive analysis, UWFDM-1098, university of wisconsin[J]. Fusion Technology Institute, Madison, WI, 1999.
[8]	Vontobel P, Pelloni S. New JEF/EFF based MATXS-Formatted nuclear data libraries[J]. Nuclear Science and Engineering, 2017,101(3):298-301.
[9]	Loughlin M. Conclusion of shutdown dose rate benchmark study[C]. Tech. rep., ITER, 6th ITER Neutronics Meeting, Hefei, China, June 17-24, 2011.
[10]	Davis A, Pampin R.Benchmarking the MCR2S system for high-resolution activation dose analysis in ITER[J]. Fusion Engineering and Design, 2010,85(1):87-92.
[11]	Eade T, Stonell D, Turner A.MCR2S unstructured mesh capabilities for use in shutdown dose rate analysis[J]. 2015,100:321-333.