核燃料后处理设施物项分级现状及建议

Current Situation and Suggestions on Items Classification in Nuclear Fuel Reprocessing Facilities

核燃料后处理设施具有工艺复杂、化学腐蚀性强、临界安全问题突出、辐射剂量高、释热量大、弥散性强等特点。为保证核设施安全,采取合理且有区别的安全设计措施,有必要对核燃料后处理设施物项进行分级。目前,核燃料后处理设施物项分级主要依据《核燃料后处理厂建(构)筑物、系统和部件的分级准则》(EJ/T939-2014),但该行业标准未对物项分级考虑的因素给予明确要求,操作性不强。因此,本文主要对核燃料后处理设施物项分级提出建议,为设计和核安全审评工作提供参考。

Nuclear fuel reprocessing facilities have the characteristics of complex processing, strong chemical corrosion, severe critical safety issues, high radiation dose, high decay heat and strong dispersion. In order to ensure the safety of nuclear facilities, and take reasonable and differentiated safety design measures, it is necessary to classify the items of nuclear fuel reprocessing facilities. At present, the classification of nuclear fuel reprocessing facilities is mainly based on “Classification Criteria of Structures, Systems and Components of Nuclear Fuel Reprocessing Plants” (EJ/T939-2014). However, the clear requirements of the industry criteria for the items classification are not presented and the criteria are the lack of availability. So this article aims to put forward some suggestions for items classification, and provide references for design and the nuclear safety review.