Document: NUREG-0800
Document ID: 240b218f-0879-4774-a145-71a59b902d69
Document Type: srp
Title: RADIOLOGICAL CONSEQUENCES OF A DESIGN BASIS LOSS-OF-COOLANT
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350160.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.6.5
CFR Part: 
CFR Title: 

Content:
rmine the iodine removal capability and the results are transmitted to AEB for use in the independent analysis.' II. ACCEPTANCE CRITERIA The acceptance criteria are based on the requirements of 10 CFR Part 100 (Ref. 2) as related to mitigating the radiological consequences of an accident. Specific criteria necessary to meet this requirement are as follows: (1) ESF systems that circulate water outside the containment are assumed to leak during their intended operation (e.g., valve stem leakage) and as a result of'a failure of a passive component; Both types of leakage are included in the review. ESF atmosphere filtration systems should be pro- vided in those areas where such leakage is postulated to occur in order to mitigate the radiological consequences'from the fission product release. (2) The radiological consequences from the postulated leakage should be calcu- lated using conservative assumptions. 50% of the core iodine inventory, based upon the maximum reactor power level, should be assumed to be mixed in the sump water being circulated through the containment external piping systems, in accordance with the values listed in Table 1 of Regulatory Guide 1.7 (Ref. 1). The atmospheric dispersion factors (X/Q values) as determined under SRP Section 2.3.4 should be used in the analysis. (3) The radiological consequences from ESF component leakage, as calculated by the staff, should be combined, under SRP Section 15.6.5 Appendix A, with the consequences from other fission product release paths to deter- mine the total calculated radiological consequences from the hypothetical LOCA. The acceptability of the site, with respect to the total radiological consequences, is determined by.the adequacy of the exclusion area and low population zone outer boundary distances in conjunction with the operation of dose-mitigating ESF systems. For operating license applications, the total doses should be within the exposure guidelines of 10 CFR Part, 100, § 100.11 (Ref. 2) and for