Document: NUREG-0800
Document ID: 49aefb86-1adb-4b3c-826f-480e32947595
Document Type: srp
Title: Radiological Consequence Analyses Using Alternative Source Terms
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0037/ML003734190.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.0.1
CFR Part: 
CFR Title: 

Content:
nce should be resolved with the licensee. Although the licensee is allowed to propose alternatives to the guidance, large amounts of staff resources were expended in developing the revised source term (Ref. 5) from which the RG-1.183 source term was derived. Section 2.0 of RG-1.183 provides generic guidance on what would be expected before the staff would approve an AST with deviations from the AST in Section 3.0 of the guide. 5. The analysis methods and assumptions used by the licensee in determining the core inventory should be reviewed to ensure that they are based on current licensing basis rated thermal power, enrichment, and burnup. 6. The following review should be performed for each radiological analysis described in the licensee’s submittal: a. The sequence of accident events described by the licensee should be reviewed to ensure that the analyzed case that maximizes the radioactivity release has been considered. This portion of the review should be coordinated with SRXB and SPLB as necessary. 15.0.1-13 Rev. 0 -- July 2000 b. The models, assumptions, and parameter inputs used by the licensee should be reviewed to ensure that the conservative design basis assumptions outlined in RG-1.183 have been incorporated. These assumptions provide an integrated approach to performing the individual analyses and licensees are generally expected to use these assumptions or to propose acceptable alternatives. Licensee-proposed alternatives to this guidance may be accepted if technically appropriate and of an appropriate level of conservatism. Significant departures from this guidance will warrant additional review. Previously approved licensing basis assumptions may be utilized unless the assumptions are technically inconsistent with the AST or TEDE, or if the use of that assumption in conjunction with the proposed modification creates a concern regarding adequate protection of the public. c. Independent calculations should be performed as necessary to conclude, with