MCNP Apply in Calculating the Changing of Reactor Critical Coefficient K<sub>eff</sub> under Different Temperature

曾磊; 杨波; 刘义保; 赵梦云

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MCNP Apply in Calculating the Changing of Reactor Critical Coefficient K_eff under Different Temperature

更新时间：2026-01-19

- MCNP Apply in Calculating the Changing of Reactor Critical Coefficient K_eff under Different Temperature
- Issue 1, Pages: 24-26+40(2012)
- 作者机构：
  
  1. 东华理工大学核工程与技术学院
  2. 东华理工大学放射性地质与勘探技术国防重点学科实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： TL326
- Published：2012
- 稿件说明：
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[1]曾磊,杨波,刘义保,赵梦云.MCNP在计算温度对反应堆临界系数K_(eff)值影响中的应用[J].能源研究与管理,2012(01):24-26+40.

曾磊, 杨波, 刘义保, et al. MCNP Apply in Calculating the Changing of Reactor Critical Coefficient K_eff under Different Temperature[J]. 2012, (1): 24-26+40.
[1]曾磊,杨波,刘义保,赵梦云.MCNP在计算温度对反应堆临界系数K_(eff)值影响中的应用[J].能源研究与管理,2012(01):24-26+40. DOI：

曾磊, 杨波, 刘义保, et al. MCNP Apply in Calculating the Changing of Reactor Critical Coefficient K_eff under Different Temperature[J]. 2012, (1): 24-26+40. DOI：

摘要

堆芯内温度变化时

中子能谱、微观截面等都将相应地发生变化。所以与反应性有关的许多参数

如热中子利用系数、逃脱共振俘获概率等都是温度的函数。因而

当反应堆中各种成分的温度变化时

将引起反应堆临界系数的变化。本文利用蒙特卡罗方法的MCNP程序

从压水堆的压力容器

燃料组件和控制棒驱动组件等元件出发建模

对温度改变之于反应堆剩余反应性影响做了相应研究。模拟结果表明:随着温度的升高

反应堆剩余反应性逐渐减。并且得到结果与实际值较符合。

Abstract

Reactor core temperature changing

the neutron spectrum

micro-cross-section will change accordingly. So many parameters of the reaction

such as the thermal neutron utilization factor

the probability of escaping resonance capture

are all a function of temperature. Thus

when the various components of the reactor temperature change

it will cause the reactor critical factor changing. In this paper

by using MCNP program

based on modeling on the PWR pressure container

fuel module and drive component elements

the corresponding research on the effects of reactor excess reactivity under different temperature were analyzed. The simulation results show that

with the increasing of temperature

reactor excess reactivity decrease gradually. And the results have a good fit with the practical values.

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MCNP Apply in Calculating the Changing of Reactor Critical Coefficient Keff under Different Temperature

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摘要

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MCNP Apply in Calculating the Changing of Reactor Critical Coefficient K_eff under Different Temperature