秦山三核重水堆核电站职业氚内照射监测报告

目的 研究重水堆核电站氚内照射的剂量监测和照射防护,为氚内照射个人剂量的监测与氚内照射的防护提供参考。方法 对秦山第三核电厂运行十五年来的氚内照射剂量监测进行总结,介绍核电厂氚内照射监测方法,研究氚内照射个人剂量和集体剂量趋势,对比分析运行、维修、燃料操作、辐射防护等典型受照工种的集体剂量的分布特点。结果 自2003年以来,秦山第三核电厂严格按照国家相关法规标准开展氚内照射个人剂量监测,年均监测人数1 600人,年均监测人次11 000人次,工作人员年度氚内照射集体剂量均值149.62人·mSv,占年均总集体剂量的19.07%。结论 秦山第三核电厂氚内照射个人剂量监测实现了受照人员无遗漏、监测类型无缺项,监测计划最优化,满足国家相关法规标准的要求;工作人员职业氚内照射剂量值低于国家个人剂量限值和电厂管理目标值,其年度平均氚内照射集体剂量远低于国外重水堆核电站数值,氚内照射的防护与控制措施是有效的。

Personnel dosimetry report on occupational tritium internal exposure of third Qinshan heavy water reactor nuclear power plant

To provide the reference of personnel dosimetry and protection on the tritium internal exposure by studying the tritium internal exposure dosimetry and protection in the heavy water reactor nuclear power plant. Methods The tritium internal exposure dosimetry of Third Qinshan Nuclear Power Plant (hereinafter referred to as TQNPP) in the last 15 years is summarized, the trend of the individual and collective tritium internal exposure dose is analyzed, and the distribution of the collective tritium internal exposure dose among the typical jobs is compared. Results Since 2003, about 1600 workers were monitored every year, and totally about 11 000 urine samples were analyzed and calculated for internal dose. The average annual tritium internal collective dose is 149.62 person·mSv, which takes about 19.07% of the total annual collective dose. Conclusion The results show that the tritium internal exposure dosimetry of TQNPP meets the requirements of the related regulations and standards, all workers and all types of tritium internal exposure are monitored, the monitoring plans are optimized, the individual tritium internal dose is under the national regulatory limit and the station management target, the average annual internal collective dose is lower than other PHWR plants around the world.