Document: NUREG-0800
Document ID: fd06ef1f-75ea-4f29-9779-8714e92f3050
Document Type: srp
Title: MAIN STEAM ISOLATION VALVE LEAKAGE CONTROL SYSTEM (BWR)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070451.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.7
CFR Part: 
CFR Title: 

Content:
RP Section 14.3 (proposed) contains procedures for the review of certified design material (CDM) for the standard design, including the site parameters, interface criteria, and ITAAC.51 IV. EVALUATION FINDINGS The reviewer verifies that sufficient information has been provided and his that the review 52 supports conclusions of the following type, to be included in the staff's safety evaluation report (SER):53 The main steam isolation valve leakage control system (MSIVLCS) includes the source of the sealing medium, (if used) pumps, valves, and piping to the points of connection or interface with the main steam lines. The system is designed to seismic Category I, Quality Group B requirements since it is necessary for postaccident fission product removal. That portion of the system connected to the piping between the MSIVs is designed to seismic Category I, Quality Group A requirements since it is part of the primary coolant system pressure boundary. Based on the review of the applicant's proposed design criteria, design bases, safety classification of system and components, and the requirements for operation of the system during loss-of-coolant accident conditions, the staff concludes that the design of the main steam isolation valve leakage control system is in conformance with the Commission's regulations as set forth in General Design Criteria 2, 4, and 54. This conclusion is based on the following: 1. The applicant's design meets the requirements of General Design Criterion 2 since the design is in accordance with position C.1 of Regulatory Guide 1.29 and position C.1 of Regulatory Guide 1.96. 2. The applicant's design meets General Design Criterion 4 with regards to pipe breaks and missiles since the design meets positions C.2 and C.4 of Regulatory Guide 1.96. 3. The applicant's design also meets the requirements of General Design Criterion 54 as related to leak detection, isolation, and performance testing for system piping penetrating containment. The bases for