Calculation of effective delayed neutron fraction with Monte Carlo perturbation techniques

被引：27
作者：
Nagaya, Yasunobu [1 ]
Mori, Takamasa [1 ]
机构：
[1] Japan Atom Energy Agcy, Naka, Ibaraki 3191195, Japan
来源：
ANNALS OF NUCLEAR ENERGY | 2011年 / 38卷 / 2-3期
关键词：
Effective delayed neutron fraction; Monte Carlo; Differential operator sampling; Correlated sampling; GENERATION TIME;
D O I：
10.1016/j.anucene.2010.10.020
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：
New methods are proposed to estimate the effective delayed neutron fraction beta(eff) in Monte Carlo calculations: the eigenvalue methods jointly used with the differential operator sampling and correlated sampling techniques. In particular, the eigenvalue method with the differential operator sampling technique has a distinct feature that it theoretically gives an exact beta(eff) value. To verify the proposed methods, Monte Carlo calculations are performed for several systems with simple geometry. It is found that the results obtained with the proposed methods agree with the reference deterministic results within sufficiently small statistical uncertainties. The indirect perturbed source effect must be taken into account to estimate an exact beta(eff) value. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：254 / 260
页数：7
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