Document: NUREG-0800
Document ID: c75a9de4-9927-49e4-b078-7f5dadd37acd
Document Type: srp
Title: DESIGN BASIS ACCIDENT RADIOLOGICAL CONSEQUENCE ANALYSES FOR
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0702/ML070230012.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.0.3
CFR Part: 
CFR Title: 

Content:
release to the environment from the site during the entire period of the DBA as a function of time. D. The staff reviews the fission product distribution, transport, removal, and release models within and between the major structures and systems, as well as the engineered safety feature (ESF) components of the facility, that bear significantly on the acceptability of the site with respect to the radiological consequence evaluation factors identified in 10 CFR 50.34(a)(1). The staff reviews the efficiencies of fission product removal by the ESF systems and components. Conditions for credit for fission product removal by ESF systems are discussed in SRP Sections 6.5.1 - 6.5.5 and control room habitability systems are discussed in SRP Section 6.4. The review under this SRP section should be coordinated with the primary review organization for each of the aforementioned sections. 15.0.3-13 March 2007 E. Advanced reactor designs may include unique design features and passive safety systems. The design basis accident radiological consequences analyses may consider credit for the mitigation capability of the design through natural fission product removal processes such as diffusiophoresis, thermophoresis and gravitational settling. The staff’s review of removal through natural fission product removal processes or for unique features of the design will require additional information from the applicant to fully explain the process being credited, the amount of removal being credited (specifically decontamination factors or coefficients and timing), basis for the proposed values and inputs to the dose analysis calculation, and the justification for assuming the removal process is applicable to the design of the plant for the duration of the event. The staff should determine if a technical assistance contract to assist the NRC staff should be placed to verify the applicant’s proposed fission product removal credit. F. The staff reviews the points of fission product release