辐射防护通讯 ›› 2016, Vol. 36 ›› Issue (4): 35-38.

• 经验交流 • 上一篇    下一篇

宁德核电厂液态流出物中14C测量

陈利刚, 刘衡, 李付平, 李静   

  1. 福建宁德核电有限公司, 宁德, 355200
  • 收稿日期:2016-04-20 发布日期:2021-11-19
  • 作者简介:陈利刚(1988- ),2011年毕业于兰州大学放射化学专业,学士; 工程师。

Measurement of 14C in Liquid Effluents from Ningde NPP

Chen Ligang, Liu Heng, Li Fuping, Li Jing   

  1. Fujian Ningde Nuclear Power Co.,Ltd,Ningde, 355200
  • Received:2016-04-20 Published:2021-11-19

摘要: 建立了一种测量核电厂液态流出物中14C的分析方法——使用1030 W总碳分析仪将样品中的碳酸化、氧化成CO2,然后用NaOH溶液吸收,最后用3180液闪计数器对NaOH吸收液进行测量。该方法能够有效消除其他放射性核素的干扰,且能准确测定样品中14C的活度。实验结果表明,方法的加标回收率平均为96.91%,探测限为2.07 Bq/L,测定结果的精密度(相对标准偏差)小于±5%,准确度(相对误差)小于±5%。

关键词: 核电厂, 液态流出物, 14C

Abstract: By combining a 1030W total carbon analyzer and a 3180 liquid scintillation counter, a method for measuring 14C in NPP liquid effluents was established. It was achieved by using the totalcarbon analyzer to have the carbon in sample acidized and oxidized to carbon dioxide, which was then absorbed with a sodium hydroxide solution, and succeeded byliquid scintillation measurement. The method can effectively eliminate interference from other radionuclides, and can accurately determine 14C activity in the sample. The results show that its overall average recovery was 96.91%,detection limit was 2.07 Bq/L, and, the precision (relative standard deviation)and accuracy (relative error) of measurement results was less than ±5% respectively.

Key words: NPP, Liquid effluence, 14C

中图分类号: 

  • X83