Conceptual study of axial offset fluctuations upon stepwise power changes in a thorium-plutonium core to improve load-following conditions

被引：1

作者：

Lau, Cheuk Wah ^{[1
]}

Dykin, Victor ^{[1
]}

Nylen, Henrik ^{[1
,2
]}

Bjork, Klara Insulander ^{[1
,3
]}

Sandberg, Urban ^{[2
]}

机构：

[1] Chalmers Univ Technol, Dept Appl Phys, Div Nucl Engn, SE-41296 Gothenburg, Sweden

[2] Ringhals AB, SE-43285 Varobacka, Sweden

[3] Thor Energy AS, NO-0255 Oslo, Norway

来源：

ANNALS OF NUCLEAR ENERGY | 2014年 / 72卷

关键词：

Thorium; PWR; Axial offset; Xenon oscillations; Stability; Load following;

D O I：

10.1016/j.anucene.2014.04.038

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：

The increased share of renewable energy, such as wind and solar power, will increase the demand for load-following power sources, and nuclear reactors could be one option. However, during rapid load-following events, traditional UOX cores could be restricted by the volatile oscillation of the power distribution. Therefore, a conceptual study on stability properties of Th-MOX PWR concerning axial offset power excursion during load-following events are investigated and discussed. The study is performed in SIMULATE-3 for a realistic PWR core (Ringhals-3) at the end of cycle, where the largest amplitude of the axial offset oscillations is expected. It is shown that the Th-MOX core possesses much better stability characteristics and shorter reactor dead time compared with a traditional UOX core, and the main reasons are the lower sensitivity to perturbations in the neutron spectrum, lower xenon poisoning and lower thermal neutron flux. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：84 / 89

页数：6