Shielding design of the multi-purpose reflectometer of China spallation neutron source

Shen Fei; Liang Tai-Ran; Yin Wen; Yu Quan-Zhi; Zuo Tai-Sen; Yao Ze-En; Zhu Tao; Liang Tian-Jiao

doi:10.7498/aps.63.152801

Abstract

The shielding design employing the Monte Carlo simulation code of MCNPX 2.5.0 for multi-purpose reflectometer of China spallation neutron source (CSNS) is introduced, including the shielding needs, radiation source terms, calculating methods and simulation results, etc. Various radiation source terms such as the moderator leakage source term, and the neutron guide loss source term etc. are taken into account in the simulation, and step-by-step calculation method and variance reduction methods such as source angular biasing, source energy biasing, and geometry splitting, are adopted to improve the computing speed while the precision of the results is guaranteed. In the shielding design of instrument transport beamline, second shutter, and scattering room etc., the final shielding parameters are determined by comparing the shielding need under different operating conditions, to ensure the dose rate below the 2.5 Sv/h limitation in accessible locations outside the shielding.

Keywords:

Authors and contacts

1.
The School of Nuclear and technology, Lanzhou University, Lanzhou 73000 China;
2.
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
3.
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;
4.
Department of Physics, Nankai University, Tianjin 300071, China
Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 91026009, 11174358, 11075203).

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Cited By

[1]
[2]	Wang F W, Liang T J, Yin W, Yu Q Z, He L H, Tao J Z, Zhu T, Jia X J, Zhang S Y 2013 Sci. China-Phys. Mech. Astron. 56 2410
[3]
[4]	Yin W, Liang T J Yu Q Z 2011 Nucl. Instrum. Meth. A 631 105
[5]	Gallmeier F, Ferguson P, Iverson E, Popova I, Lu W 2006 Nucl. Instrum. Meth. A 562 946
[6]
[7]
[8]	Harada M, Oikawa K, Kasugai Y, Maekawa F 2011 Prog. Nucl. Sci. Tech. 1 94
[9]	Song J, Yin Y P Li J, Liu L J, Wang H, Sun G A 2013 Nucl. Phys. Rev. 30 47 (in Chinese) [宋建明, 尹延朋, 李建, 刘丽鹃, 王虹孙光爱 2013 原子核物理评论 30 47]
[10]
[11]
[12]	Pelowitz D 2005 MCNPXTM user's manual version 250 LA-CP-05-0369
[13]
[14]	Yin W, Yu Q Z, Liang T J 2011 Acta Phys. Sin. 60 052501 (in Chinese) [殷雯, 于全芝, 梁天骄 2011 物理学报 60 052501]
[15]	Zsigmond G, Lieutenant K Mezei F 2002 Neutron News 13 11
[16]
[17]	Lefmann K Nielsen K 1999 Neutron News 10 20
[18]
[19]	Bertini H W 1969 Phys. Rev. 188 1711
[20]
[21]
[22]	Deng L, Li S, Mo Z Y, Li G 2011 Acta Phys. Sin. 60 022401 (in Chinese) [邓力, 李树, 莫则尧李刚 2011 物理学报 60 022401]
[23]
[24]	Dai C J, Liu X Q, Liu Z L, Liu B L 2013 Acta Phys. Sin. 62 152801 (in Chinese) [戴春娟, 刘希琴, 刘子利刘伯路 2013 物理学报 62 152801]
[25]	Grande P, O'Riordan M C 1971 Data for Protection against Ionizing Radiation from External Sources: Supplement to ICRP Publication 15, ICRP-21, International Commission on Radiological Protection (Pergamon Press)

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Vol. 63, Issue 15 - 2014-08-05

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