剂量率在严重事故下乏燃料损伤评价系统中的应用

Dose Rate Applied to Spent Fuel Damage Degree Evaluation System under Severe Accident Condition

摘要: 本文介绍了一种利用剂量率监测值评价严重事故时乏燃料损伤程度的方法。分别计算不同富集度、燃耗的乏燃料100%包壳损伤的剂量率作为数据库，根据停堆时间、事故的发生时间与实际监测值来评估乏池中燃料的损伤份额，实现了对乏池中不同类型燃料的损伤程度的差异化评估。本文方法已应用于秦山二期的乏燃料损伤评价系统中。

Abstract: A method for evaluating spent fuel damage degree based on dose rate measurement was introduced. Dose rate data of 100% cladding damage for various fuel enrichments and burnups were collected as data base. Spent fuel damage fraction was evaluated by shutdown time, accident time and monitor dose rate. In such way, spent fuel damage degree of different fuel types was evaluated separately. The method is applied to Qinshan Ⅱ spent fuel damage degree evaluation system.