Emergency evaluation model for nuclear criticality accidents of uranium enrichment facility. Issue 1 (1st February 2022)

• Record Type: Journal Article
• Authors: Jia, Linsheng; Yang, Yapeng; Wang, Renze; Feng, Zongyang; Wang, Ning; Liang, Boning
• Is Part Of: IOP conference series. Volume 983:Issue 1(2022)
• Publication Date: 2022-02-01
• Subjects: Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/983/1/012070
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: Accident emergency evaluation technology is an important part of emergency preparedness and response for nuclear critical accidents. Moreover, emergency management also requires that facility with potential nuclear criticality accidents should have the emergency evaluation capability of the accident, so it can provide auxiliary decision support for early emergency decision-making. The paper introduces the emergency evaluation model for nuclear criticality accident of uranium enrichment facilities, including criticality fission number estimation, released source term estimation and dose estimation. The potential nuclear critical accident scenario of uranium enrichment facilities considered in the paper is uranyl fluoride solution criticality. Solution criticality is a complex accident scenario that may involve multiple criticality problems. In the paper, the criticality fission number is estimated based on the critical radiation monitoring data, which can give the results quickly and meet the emergency requirements. Estimation of criticality fission number is a technical difficulty, which can directly reflect nuclear criticality accident scale and provide a theoretical basis for conservative protective actions.