γ辐照条件下硼-锂-氨型冷却剂的辐射分解行为

曹骐; 杜香怡; 郭子方; 林子健; 杨雨; 朱伟; 林铭章

doi:10.11889/j.1000-3436.2023-0020

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γ辐照条件下硼-锂-氨型冷却剂的辐射分解行为

辐射化学 | 更新时间：2023-06-21

- γ辐照条件下硼-锂-氨型冷却剂的辐射分解行为
- γ-radiolysis of boric acid-lithium hydroxide-ammonia coolant
- 辐射研究与辐射工艺学报 2023年41卷第3期页码：30201
- 作者机构：
  
  1.中国核动力研究设计院成都 610213
  2.中国科学技术大学核科学技术学院合肥 230026
- 作者简介：
  
  曹骐，男，1985年2月出生，2011年6月于四川大学获硕士学位，目前为中国科学技术大学在读工程博士，于中国核动力设计院从事反应堆水化学、辐射化学、放射化学研究工作，副研究员，E-mail: 404450346@qq.com
  林铭章，博士，教授，E-mail: gelin@ustc.edu.cn
- 基金信息：
  
  “十四五”装备预研专用技术(2102020502);“叶企孙”科学基金(U2241289)
- DOI：10.11889/j.1000-3436.2023-0020
  中图分类号：
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曹骐, 杜香怡, 郭子方, 等. γ辐照条件下硼-锂-氨型冷却剂的辐射分解行为[J]. 辐射研究与辐射工艺学报, 2023,41(3):030201.

CAO Qi, DU Xiangyi, GUO Zifang, et al. γ-radiolysis of boric acid-lithium hydroxide-ammonia coolant[J]. Journal of Radiation Research and Radiation Processing, 2023,41(3):030201.
曹骐, 杜香怡, 郭子方, 等. γ辐照条件下硼-锂-氨型冷却剂的辐射分解行为[J]. 辐射研究与辐射工艺学报, 2023,41(3):030201. DOI： 10.11889/j.1000-3436.2023-0020.

CAO Qi, DU Xiangyi, GUO Zifang, et al. γ-radiolysis of boric acid-lithium hydroxide-ammonia coolant[J]. Journal of Radiation Research and Radiation Processing, 2023,41(3):030201. DOI： 10.11889/j.1000-3436.2023-0020.

摘要

本文探究了γ辐射场下新型冷却剂硼-锂-氨的辐射分解行为，主要考察了不同硼-锂浓度、吸收剂量和吸收剂量率对辐解产物H,2,O,2,、NO,2,-,和NO,3,-,的浓度影响。实验结果表明：在常规的压水堆运行pH范围内（pH,300 ℃,=7.1~7.3），随着硼酸浓度增加，冷却剂体系的H,2,O,2,和NO,2,-,浓度没有明显变化，其中H,2,O,2,的浓度范围在9.28×10,-5,~1.07×10,-4, mol/L之间，NO,2,-,浓度范围为9×10,-6,~1.5×10,-5, mol/L；NO,3,-,浓度相较于前两个产物波动较大，为4×10,-5,~8×10,-5 ,mol/L。随着吸收剂量增加（1~30 kGy），硼-锂-氨体系中的H,2,O,2,和NO,2,-,的平衡浓度增加，分别为1.28×10,-4, mol/L和1.30×10,-5, mol/L，NO,3,-,的浓度未明显变化（4×10,-5,~6×10,-5, mol/L）。在本工作探究的吸收剂量率范围内（1.27~18.86 Gy/min），H,2,O,2,、NO,2,-,和NO,3,-,的浓度均未因吸收剂量率增加而受到显著影响。本工作为新型冷却剂硼-锂-氨体系的实际应用提供了有参考价值的基础数据。

Abstract

In this study, the γ-radiolysis,of boric acid-lithium hydroxide-ammonia coolant was investigated under different conditions, including boric acid concentration, absorbed dose, and absorbed dose rate. The concentrations of H,2,O,2, NO,2,-, and NO,3,- ,were determined using UV-visible spectroscopy and ion chromatography. With an increase in boric acid concentration, the concentrations of H,2,O,2, and NO,2,-, in the coolant system did not change significantly,within a pH range commonly used in pressurized water reactor operation. Specifically, the concentration of H,2,O,2, varied from 9.28×10,-5, to 1.07×10,-4, mol/L, while that of NO,2,-, changed from 0.9×10,-5, to 1.5×10,-5, mol/L. In contrast, the concentration of NO,3,-, fluctuated significantly, ranging from 4×10,-5, to 8×10,-5 ,mol/L. With an increase in the absorbed dose (1-30 kGy), the equilibrium concentration of H,2,O,2, and NO,2,-, in boric acid-lithium hydroxide-ammonia system increased to 1.28×10,-4, mol/L and 1.30×10,-5, mol/L, respectively. Meanwhile, the concentration of NO,3,-, did not change significantly (4×10,-5, to 6×10,-5, mol/L). The concentrations of the three radiolytic products were not significantly affected within the given absorbed dose rate range (1.27 to 18.86 Gy/min). Overall, this work provides valuable basic data for optimizing the new boric acid-lithium hydroxide-ammonia coolant system.

关键词

硼酸氢氧化锂氨冷却剂辐射分解

Keywords

Boric acidLithium hydroxideAmmoniaCoolantRadiolysis

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