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:
cal specifications (TS), or the design basis source term, whichever is more limiting, is used to determine the effects of events like primary to secondary leaks and reactor steam source terms. This is addressed in SRP Section 11.1 for reactor coolant (primary and secondary) and reactor steam design details. 3. Design basis source terms, based on 0.25 – 1 percent fuel defects, as described in SRP Section 12.2, “Radiation Sources,” are used to determine the adequacy of shielding and ventilation design features. 4. Post-accident shielding source term (for vital area access, including work in the area), as described in SRP Section 12.2, is based on guidance from NUREG-0737, Item II.B.2, RG 1.89, or RG 1.183. 5. Equipment qualification (EQ) source term, which may or may not be more limiting than the stated accident source term. Further guidance is addressed in SRP Section 3.11, “Environmental Qualification of Mechanical and Electrical Equipment” and SRP Section 12.2, RG 1.89, or 1.183 App I; in developing source terms used to assess dose and dose rates to equipment. 6. Accident source term, which is based on Design Basis Events (DBE), is used to determine dose to the public and plant operators during a DBE. Addressed in SRP Chapter 15, “Transient and Accident Analysis.” As described below, this SRP section addresses the derivation and the use of the source terms described in Items 1 and 2 above. Other SRP sections may utilize parameters (i.e., letdown rate, removal efficiencies, and decontamination factors, etc.) described within SRP Chapter 11 as the basis for deriving the design bases for shielding and ventilation utilizing the source term described in Item 3. As a result, the information needed for the staff to conduct its evaluation will require the review 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