Document: NUREG-0800
Document ID: 09e53ce5-bec3-4415-82d1-82ee125cb7c1
Document Type: srp
Title: describes the design acceptance criteria for the LWMS.  The classification of
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070720635.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11.2
CFR Part: 
CFR Title: 

Content:
TP 11-6-5 March 2007 operations or anticipated operational occurrences will not result in releases that exceed the limits specified in 10 CFR Part 20, Appendix B, Table 2 effluent concentration limits using the unity rule and sum-of-the-fractions. D. EVALUATION FINDINGS The reviewer verifies that the applicant has provided sufficient information and that the review and calculations support conclusions of the following types to be included in the staff’s safety evaluation report. The reviewer also states the bases for those conclusions. The scope of the review included the calculation of radionuclide concentrations in the applicable failed components based upon the expected PWR fuel failure rate or BWR fuel release rate for the plant, and the effect of site hydrology for those systems that have not been provided with special design features to mitigate the effects of failures. Radionuclide concentrations at the nearest potable water supply were found to be acceptable. The basis for acceptance has been that the staff's review shows that the postulated failure of a tank and its associated components would not result in radionuclide concentrations in excess of 10 CFR Part 20, Appendix B, Table 2, Column 2, at the nearest source of potable water as described in the application. For those cases where special design features were incorporated to mitigate the consequences of a failure of a tank and its associated components, the following type of statement is made: Tanks for which special design features were incorporated to mitigate the consequences of failures, such as steel liners or walls or dikes surrounding the failed tanks and their components and tank overflow provisions, were evaluated and found to be acceptable. The basis for the staff's acceptance was the capability of these design provisions to prevent the release of radioactivity from entering a potable water supply system. Therefore, the staff concludes that the design provisions incorporated by the