第36卷第1期 2016年2月
核科学与工程
Nuclear Science and Engineering
Vol.36No.1
Feb.2016
压水堆核电站一回路16N源项计算模型的优化
周静，汪细河，乔培鹏
（深圳中广核工程设计有限公司上海分公司，上海市）
摘要："N是压水堆一回路冷却剂中的主要活化产物，也是一回路中的主要辐射源。本文在传统N源项计算模型的基础上，根据堆芯内冷却剂的流向，考患堆芯区域以及下降段区域的中子通量差异，将堆芯划分为活化区域以及反射区域，并建立了相应的计算模型，以典型三代压水堆核电站为例进行了计算与验证，计算结果与技术文件吻合良好，偏差在10%以内，验证了模型的正确性。最后分析了一回路典型部位的"N平衡放射性活度浓度，发现在反应堆堆芯出口处最高，随着冷却剂流向逐步减少。研究结果表明，优化的计算模型可更准确计算压水堆核电站冷却剂的"N源项，为分析反应堆一回路的辐射源项提供参考依据。
关键调：压水堆，反应堆冷却剂，"N，源项
中图分类号：TL413/TL7
文献识别码：A
文章编号：0258-0918(2016)01-0010-06
OptimizedCalculationModel of 16NRadiation
SourcesinPrimaryCoolant ofPWR ZHOU Jing，WANG Xi-he,QIAO Pei-peng(Shanghai Branch, China Nuclear Power Design Co, , Ltd. , Shanghai)
Abstract: As the coolant is the main activated product passing through each activation region in the reactor vessel, the neutron in the region will activate the oxygen in water into activated product, such as"N.N is themain product, and it is themost important radiation sources in the primary side. A 1N radiation sources model is established based on conventional method and primary coolant flow direction, dividing the core area into activation regions and reflection regions.To prove the validity of the calculation model, the integrative calculation of lN radiation sources in the primary coolant was completed. The coolant typical 1'sN model equilibrium radiation sources were analyzed. It finds out that the radiation sources are maximum at the core outlet, and are reduced along with the coolant. The study result shows that the optimized calculation model
gives more accurate calculation for the 1 N sources. Keywords:PWR;coolant;1N;radiationsources
修回日期：2015-03-21
静（1986一），女，工程师，大学本科，现从事核电站辐射屏蔽设计工作
作者简介：周 10