Document: NUREG-0800
Document ID: 36b6a414-c2ba-46ab-ae85-e214a0f457fa
Document Type: srp
Title: COOLANT SOURCE TERMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1502/ML15029A022.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11.1
CFR Part: 
CFR Title: 

Content:
iew of several PSAR/FSAR sections to confirm the relevance and adequacy of the supporting information used by the applicant in developing source terms. This SRP section addresses the review of coolant source terms used to evaluate RWMS in pressurized water reactors (PWRs) and boiling water reactors (BWRs). The review does not address an evaluation of plant and process equipment, given the purpose and scope of SRP Sections 11.2 to 11.5, but does rely on plant operating characteristics and RWMS design parameters in calculating radionuclide concentrations in primary and secondary coolant and reactor steam. Similarly, this SRP section does not include a review on the generation of neutron-activated components, in-core neutron detectors, or spent-fuel. Two source terms are 11.1-3 Revision 4 – January 2016 reviewed: radioactive materials expected during normal operations and AOOs, and design basis source terms. For the purpose of this SRP section, radionuclide concentrations in primary and secondary coolant and reactor steam are expected to be representative of operating experience and plant conditions over the life of the plant in estimating radioactivity levels in process and effluent streams. The resulting radionuclide concentrations are not intended to be used as the sole basis for the design of the plant and RWMS. The design basis coolant source term is used to derive inventories of radioactivity in reactor systems and components, assess the adequacy of the design of plant systems (such as shielding and ventilation) in maintaining doses to workers and public as low as reasonably achievable (ALARA), define ambient radiation exposure levels in radiologically controlled zones of the plant, and confirm the adequacy of the operating range and proper placement of radiation monitoring equipment in plant areas. These uses are consistent with Title 10 of the Code of Federal Regulations (10 CFR) Part 20, Subparts G and H. The design basis source term represents a