MCNP and GADRAS Comparisons

[摘要] To facilitate the timely execution of System Threat Reviews (STRs) for DNDO, and also to develop a methodology for performing STRs, LANL performed comparisons of several radiation transport codes (MCNP, GADRAS, and Gamma-Designer) that have been previously utilized to compute radiation signatures. While each of these codes has strengths, it is of paramount interest to determine the limitations of each of the respective codes and also to identify the most time efficient means by which to produce computational results, given the large number of parametric cases that are anticipated in performing STR's. These comparisons serve to identify regions of applicability for each code and provide estimates of uncertainty that may be anticipated. Furthermore, while performing these comparisons, examination of the sensitivity of the results to modeling assumptions was also examined. These investigations serve to enable the creation of the LANL methodology for performing STRs. Given the wide variety of radiation test sources, scenarios, and detectors, LANL calculated comparisons of the following parameters: decay data, multiplicity, device (n,??) leakages, and radiation transport through representative scenes and shielding. This investigation was performed to understand potential limitations utilizing specific codes for different aspects of the STR challenges.

[发布日期] 2016-04-19

[学科分类] 核物理和高能物理

[关键词] M CODES;G CODES;COMPARATIVE EVALUATIONS;LANL;RADIATION TRANSPORT;NUCLEAR DECAY;DESIGN;NEUTRON LEAKAGE;MULTIPLICITY;SENSITIVITY ANALYSIS;SHIELDING;COMPUTERIZED SIMULATIO