Layout design and physical effect analysis of control rod in PB-FHR

Shihe YU; Rui YAN; Ruimin JI; Bo ZHOU; Yafen LIU; Yang ZOU

doi:10.11889/j.0253-3219.2018.hjs.41.010605

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Layout design and physical effect analysis of control rod in PB-FHR

NUCLEAR ENERGY SCIENCE AND ENGINEERING | 更新时间：2021-05-19

- Layout design and physical effect analysis of control rod in PB-FHR
- NUCLEAR TECHNIQUES Vol. 41, Issue 1, Article number: 010605(2018)
- 作者机构：
  
  中国科学院上海应用物理研究所嘉定园区上海 201800
- 作者简介：
- 基金信息：
- DOI：10.11889/j.0253-3219.2018.hjs.41.010605
  CLC： TL3
- Received：21 April 2017，
  
  Revised：09 August 2017，
  
  Published：10 January 2018
- 稿件说明：
移动端阅览
Shihe YU, Rui YAN, Ruimin JI, et al. Layout design and physical effect analysis of control rod in PB-FHR[J]. Nuclear techniques, 2018, 41(1): 010605
DOI：

Shihe YU, Rui YAN, Ruimin JI, et al. Layout design and physical effect analysis of control rod in PB-FHR[J]. Nuclear techniques, 2018, 41(1): 010605 DOI： 10.11889/j.0253-3219.2018.hjs.41.010605.

摘要

反应性控制系统的设计是反应堆物理设计的主要内容之一。氟盐冷却高温球床堆（Pebble Bed-Fluoride salt-cooled High temperature Reactor，PB-FHR）用B

C吸收体的控制棒作为反应性控制的主要手段。所有控制棒分布于石墨反射层的孔道中，其空间布局、几何结构、中子吸收体的特性参数等是影响控制棒反应性控制的关键因素。本文基于SCALE6程序，以10 MW固态燃料钍基熔盐堆（Thorium Molten Salt Reactor-Solid Fuel，TMSR-SF1）（属于PB-FHR）设计模型为参考，系统研究了石墨反射层中控制棒径向位置、有效行程、棒体结构、吸收体长度、吸收体密度等因素对控制棒价值的影响。结果表明，控制棒的径向位置对控制棒价值影响较大；控制棒吸收体长度需综合考虑上下限位及极限下插限位对价值变化的影响；

B的原子密度变化对控制棒价值影响较小。本研究为PB-FHR的反应性控制系统的设计及控制棒的制造加工提供理论参考。

Abstract

Background

Reactivity control design is a key part of reactor neutronics design. The control-rods made of B

C-absorber for reactivity control in pebble bed-fluoride-salt-cooled high-temperature reactor (PB-FHR) are located in the hole of side graphite. The space layout

geometric structure

absorber properties are the key influencing factors to the reactivity control.

Purpose

This study aims at the influence of different factors of the control rod in graphite reflection layer on control rod worth

including radial position

effective stroke

absorber length

absorber density

etc

Methods

The 10-MW thorium molten salt reactor-solid fuel (TMSR-SF1) model was taken as the reference reactor

and the calculation was completed based on SCALE6. All above mentioned factors such as radial position

effective stroke

absorber length and absorber density

were taken into account for parameters design.

Results

Computational results reveal that radial position of the control rod has obvious impact on control rod worth. The absorber length

the upper limit

lower limit and overflow lower limit of the control rod that lead to the change in worth

should be considered comprehensively. The influence of

B atomic density on control rod worth was negligible.

Conclusion

This study provides basic theoretical reference for the design of PB-FHR reactivity control.

关键词

Keywords

references

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