MCNP6 simulations of gamma line emissions from fission products and their comparisons to plutonium and uranium measurements

被引：6
作者：
Andrews, M. T. [1 ,2 ]
Goorley, J. T. [2 ]
Corcoran, E. C. [1 ]
Kelly, D. G. [1 ]
机构：
[1] Royal Mil Coll Canada, Kingston, ON K7K 7B4, Canada
[2] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
来源：
PROGRESS IN NUCLEAR ENERGY | 2015年 / 79卷
基金：
加拿大自然科学与工程研究理事会;
关键词：
MCNP6; Delayed gamma; Special nuclear materials; NEUTRON; SIGNATURES; PART;
D O I：
10.1016/j.pnucene.2014.11.012
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
Aqueous solutions containing microgram quantities of special nuclear materials (SNMs) were irradiated for 60 s using a SLOWPOKE-2 reactor, and their delayed gamma (DG) emissions were recorded as a function of count time up to three minutes after irradiation. The irradiation and counting processes were simulated using the production release of MCNP6.1 and the more recent MCNP6.1.1 beta version, and the line emission option was used to create DGs. In every simulation MCNP6 successfully predicted the 25 most prominent measured fission product peaks for each SNM solution in the 0.1-1.6 MeV energy range. Fission products with gamma emissions greater than 0.6 MeV were selected for a detailed comparison of their relative measured and simulated magnitudes. There were significant fission product peak outliers, several of which were attributed to the outdated ENDF/B VI gamma line data used by MCNP6 for DG emissions. The updated time-bin structure used by MCNP6.1.1 beta for DG production and its effect on time-dependent measurements are also discussed. Discrepancies between measurements and simulations were further resolved in a final comparison which used MCNP6.1.1 beta alongside updated gamma line data files. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：87 / 95
页数：9
相关论文
共 20 条
  • [1] MODELING THE DETECTION OF DELAYED NEUTRON SIGNATURES IN MCNP6 AND COMPARISONS WITH MEASUREMENTS OF 233U, 235U, AND 239PU
    Andrews, M. T.
    Goorley, J. T.
    Corcoran, E. C.
    Kelly, D. G.
    [J]. NUCLEAR TECHNOLOGY, 2014, 187 (03) : 235 - 242
  • [2] Andrews M.T., 2015, RADIOANAL NUCL CHEM
  • [3] Identification of fissile materials from fission product gamma-ray spectra
    Beddingfield, DH
    Cecil, FE
    [J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1998, 417 (2-3) : 405 - 412
  • [4] Bronson F.L, 2009, ADV NUCL INSTRUM MEA
  • [5] High-Energy Delayed Gamma Spectroscopy for Spent Nuclear Fuel Assay
    Campbell, Luke W.
    Smith, L. Eric
    Misner, Alex C.
    [J]. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 2011, 58 (01) : 231 - 240
  • [6] THE MCNP6 DELAYED-PARTICLE FEATURE
    Durkee, Joe W., Jr.
    James, Michael R.
    McKinney, Gregg W.
    Waters, Laurie S.
    Goorley, Tim
    [J]. NUCLEAR TECHNOLOGY, 2012, 180 (03) : 336 - 354
  • [7] Delayed-gamma signature calculation for neutron-induced fission and activation using MCNPX. Part II: Simulations
    Durkee, Joe W., Jr.
    James, Michael R.
    McKinney, Gregg W.
    Trellue, Holly R.
    Waters, Laurie S.
    Wilson, William B.
    [J]. PROGRESS IN NUCLEAR ENERGY, 2009, 51 (08) : 828 - 836
  • [8] England T.R., 1994, LAUR943106, P94
  • [9] Goorley J.T., 2013, LAUR1322900
  • [10] INITIAL MCNP6 RELEASE OVERVIEW
    Goorley, T.
    James, M.
    Booth, T.
    Brown, F.
    Bull, J.
    Cox, L. J.
    Durkee, J.
    Elson, J.
    Fensin, M.
    Forster, R. A.
    Hendricks, J.
    Hughes, H. G.
    Johns, R.
    Kiedrowski, B.
    Martz, R.
    Mashnik, S.
    McKinney, G.
    Pelowitz, D.
    Prael, R.
    Sweezy, J.
    Waters, L.
    Wilcox, T.
    Zukaitis, T.
    [J]. NUCLEAR TECHNOLOGY, 2012, 180 (03) : 298 - 315
12