涉核建筑物密封包容性工艺实践

The Nuclear Building of Containment Technology Practice

为提升临界装置的实验能力,在临界装置实验大厅旁边扩建了附属建筑物,要求建设项目不显著降低大厅原有的密封包容性。针对大型非标设备安装难题,在常规施工工艺基础上进行了施工顺序调整。采取了新旧建筑结合面植筋、基础预埋钢板、墙(6 m)、梁、板整体浇筑等新技术完成了附属建筑物包容性施工。采用了SF6示踪气体法对临界装置实验大厅及其附属建筑物组成的整体包壳的包容性进行检测。检测结果表明,在24 h内SF6示踪气体的累计泄漏率为1.73%,建筑物的整体包壳满足包容性要求。对于重要涉核场所及有密封性要求的工艺场所,密封包容性工艺方法可以借鉴。

In order to enhance the experimental ability of the critical device,the ancillary buildings was extended beside the critical experiment hall.The ancillary buildings can＇ t significantly reduce the hall original containment.In view of the large non-standard equipment installation problem,the construction sequence was adjusted based on the the conventional construction process.The new containment technology was adopted,such as the planting bar technology,embeding steel plate,and using the wall,beam,plate integral pouring to construct process.After the end of construction,using SF6 tracer gas method to test the containment of the critical device experimental hall and its ancillary building,the results show that,in the 24 h SF6 tracer gas accumulated leakage rate of 1.73％,the whole building meet the containment.For the important nuclear sites and the sealing places,the containment technology can learn from.