Document: NUREG-0800
Document ID: 7c10e1ce-ce1f-4c5c-8b11-53db665b85f4
Document Type: srp
Title: REACTOR COOLANT SYSTEM HIGH POINT VENTS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340642.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.4.12
CFR Part: 
CFR Title: 

Content:
t valves, block valves, position indication devices, cable terminations, and piping) shall be seismically and environmentally qualified in accordance with IEEE 344-1975 as supple- mented by Regulatory Guide 1.100, 1.92 and SEP 3.92, 3.43, and 3.10. Environmental qualifications are in accordance with the May 23, 1980 Commission Order and Memorandum (CLI-80-21). 11. Procedures to effectively operate the vent system must consider when venting is needed and when it is not needed. A variety of initial conditions from which venting may be required shall be considered. Operator actions and the necessary instrumentation shall be identified. III. REVIEW PROCEDURES The procedures below are used during the construction permit (CP) review to assure that the design criteria and bases and the preliminary design as set forth in the Preliminary Safety Analysis Report meet the acceptance criteria given in subsection II. For operating licence (OL) reviews, the procedures are utilized to verify that the initial design criteria and bases have been appropriately implemented in the final design as set forth in the Final Safety Analysis Report. The OL review also includes the proposed technical specifications, to assure that they are adequate in regard to limiting conditions of operation and periodic surveillance testing. The reviewer will select and emphasize material from this SRP section, as may be appropriate for a particular case. 1. RSB reviews the vent system description to determine that the vent paths are capable of venting reactor coolant system high points. For areas that may be impractical to vent, such as the U-tubes in steam generators, the reviewer determines that adequate procedures have been developed to assure coolability. 2. At RSB request, ICSB reviews the instrumentation, vent controls, and power source to establish that a single failure will not prevent isolation of the vent system. 3. RSB examines valve redundancy and other methods to minimize inadvertent actuation.