Influence of extended low power operation on neutronics parameters of CNP600

Huiwen XIAO; Guoming LIU; Hong YAO; Xin GAO

doi:10.11889/j.0253-3219.2016.hjs.39.110602

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Influence of extended low power operation on neutronics parameters of CNP600

NUCLEAR ENERGY SCIENCE AND ENGINEERING | 更新时间：2021-05-24

- Influence of extended low power operation on neutronics parameters of CNP600
- NUCLEAR TECHNIQUES Vol. 39, Issue 11, Article number: 110602(2016)
- 作者机构：
  
  中国核电工程有限公司反应堆工艺研究所北京 100840
- 作者简介：
- 基金信息：
- DOI：10.11889/j.0253-3219.2016.hjs.39.110602
  CLC： TL99
- Received：22 December 2015，
  
  Revised：05 September 2016，
  
  Published：2016-11
- 稿件说明：
移动端阅览
Huiwen XIAO, Guoming LIU, Hong YAO, et al. Influence of extended low power operation on neutronics parameters of CNP600[J]. Nuclear techniques, 2016, 39(11): 110602
DOI：

Huiwen XIAO, Guoming LIU, Hong YAO, et al. Influence of extended low power operation on neutronics parameters of CNP600[J]. Nuclear techniques, 2016, 39(11): 110602 DOI： 10.11889/j.0253-3219.2016.hjs.39.110602.

摘要

随着我国能源形势的发展，核电将面临调峰运行的挑战。CNP600是我国现役的重要堆型，有必要对CNP600长期低功率运行进行评估。为了验证CNP600在长期低功率运行时中子学方面的安全性，从反应堆物理角度对CNP600长期低功率运行进行初步分析，包括长期低功率运行对堆芯径向及轴向功率分布的影响、停堆深度、焓升因子

△

与功率峰因子

的变化、燃耗及最大线功率的变化。计算结果显示，CNP600实行长期低功率运行对径向功率分布的改变很小，对轴向功率偏移的改变剧烈，通过控制棒的调节，可以维持轴向功率偏移的稳定；停堆深度、

△

、燃耗及最大线功率密度均满足安全要求。初步的分析结果表明，CNP600在反应堆方面能满足长期低功率运行。

Abstract

Background

With the development of energy industry

nuclear power is confronted with more challenges in peak load operation. CNP600 is the substantial of active service reactors

and the evaluation of CNP600 in low power operation is of great necessity.

Purpose

The aim is to evaluate whether the CNP600 can meet the neutronics safety requirements of extended low power operation (ELPO).

Methods

The influences of ELPO on the reactor physics was analyzed in this paper

including axial and radical power distribution

shutdown margin

enthalpy rise factor

△

power peak factor

burnup

and liner power density.

Results

The results indicate that the ELPO has little impact on radical power distribution

but profound impact on axial power distribution which could remain stable by the movement of control rod yet; the shutdown margin

△

and

burnup

liner power density are lower than the limit values.

Conclusion

The CNP600 can meet the neutronics safety requirements of ELPO.

关键词

Keywords

references

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