Calculation of the effects of Eu as impurity on the reactivity of the Miniature Neutron Source Reactors using the MCNP code

被引：3

作者：

Albarhoum, M. ^{[1
]}

机构：

[1] Atom Energy Commiss, Dept Nucl Engn, Damascus, Syria

来源：

ANNALS OF NUCLEAR ENERGY | 2015年 / 79卷

关键词：

MNSR; MCNP code; Impurity; Europium; Beryllium reflector;

D O I：

10.1016/j.anucene.2014.12.005

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：

Europium is present as impurity in both the side and bottom reflectors in Miniature Neutron Source Reactors (MNSRs). Natural europium is formed of two isotope, namely: Eu-151 and Eu-153 both are good absorber of thermal neutrons. Results have shown the decreasing the natural europium content in the side reflector by 35 ppm would save about 6 fuel rods in MNSRs. While it is necessary to decrease the content of natural europium in the bottom reflector by about 220 ppm to save the 6 fuel rods from loading in the core of MNSRs. By comparing the weights of the two reflectors it comes out that the side reflector is more important for MNSRs as a component but europium is more efficient in the bottom reflector of MNSRs by about 20%. The choice of performing further purification of beryllium depends on the cost of purification in the country and the purpose of the reactor. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：27 / 30

页数：4