Document: NUREG-0800
Document ID: 1085af08-a4b7-4fe7-bfed-ca7a60f2022c
Document Type: srp
Title: LOSS-OF-COOLANT ACCIDENTS RESULTING FROM SPECTRUM OF
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070734.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.6.5
CFR Part: 
CFR Title: 

Content:
7 analysis of the ECCS to verify that an adequate analysis of possible failure modes of ECCS instrumentation and controls equipment and the effect of the failure modes of 38 that equipment on the ECCS performance has been provided. 39 4. The Power Systems Branch (PSB)Electrical Engineering Branch (EELB) review of 40 8.3.1 and 8.3.2 includes the emergency onsite power functional capabilities. The PSBEELB, upon request from RSBSRXB, will verify that the control systems power 41 42 sources needed to function to mitigate the event are available as required by the applicant's description of the event. 5. The PSBEELB also, upon request from RSBSRXB, reviews the failure modes 43 44 analysis of the ECCS to verify that an adequate analysis of possible failure modes of ECCS equipment and the effect of the failure modes on the ECCS performance has been provided. 6. The Plant Systems Branch (SPLB) upon request from SRXB reviews Chapters 9 and 10 of the applicants SAR including an evaluation of auxiliary systems (e.g., service water system, component cooling system, ultimate heat sink, condensate storage facility) to confirm that these systems can supply all the functions required to support the ECCS in performing its function during and following a loss-of-coolant accident. The SPLB 45 also reviews the integrity of the reactor coolant pump seals as part of its primary review responsibility for SRP Section 9.2.2.46 7. The Mechanical Engineering Branch (MEB)(EMEB) review of SRP Sections 3.6 and 47 3.93.6.2, 3.9.2, 3.9.3, 3.9.4, and 3.9.5 includes a review of the effects of the blowdown 48 loads on core support structures and on control rod guide structures. The MEBEMEB49 verifies, upon request from RSBSRXB, that the core remains in a coolable geometry 50 following a loss-of-coolant accident and that the control rods can also be inserted. 8. The MEBEMEB also evaluates the effects of blowdown loads on the piping of the 51 reactor coolant system and on the support structures of the