Document: NUREG-0800
Document ID: 06ca0ca1-d4e9-478b-ad5d-c52597a36b46
Document Type: srp
Title: COOLANT SOURCE TERMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1305/ML13058A173.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11.1
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CFR Title: 

Content:
e normal operation source terms are used to assess the performance of RWMS and other systems under normal operating conditions (including AOOs). The design basis reactor coolant and steam source terms are used to assess equipment qualification and model releases under design basis accident conditions for evaluation against the reactor siting criteria and control room radiological habitability requirements. The main difference in the two source terms (normal operation versus design basis) is the adjustment made in deriving radionuclide concentrations in primary and secondary coolants and reactor steam. See SRP Section 3.11 on equipment qualification and SRP Chapters 12 and 15 for details on the development of the design basis source term. The review will consider the following topics: 1. The staff’s review of the radioactive coolant source terms includes consideration of parameters used to determine the concentration of radionuclides in the reactor coolant; fraction of fission product activity released to the reactor coolant; and concentrations of all non-fission products in reactor primary coolant and steam, and in secondary coolant and steam. Nevertheless, the generation of fission and activation products, fuel enrichment, fuel cladding and defects, presence of radioactivity in primary and secondary coolant and reactor steam, type coolant purification systems used in light- water reactors (LWR) generally have common features, and RWMS used to process 11.1-4 Draft Revision 4 –August 2014 liquid and gaseous wastes have essentially identical functions. The following sources of radioactivity and associated parameters are considered in evaluating the applicant’s estimates of effluent releases. Guidance determining the acceptability of the liquid and gaseous source terms and associated system parameters applied in their development is given in SRP Section 11.2 for liquid effluents, SRP Section 11.3 for gaseous effluents, and SRP Section 11.4, “Solid Waste