Document: NUREG-0800
Document ID: 15a004f9-6c99-4bc0-a858-efeaea553e8e
Document Type: srp
Title: REACTOR COOLANT SYSTEM HIGH POINT VENTS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070440.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.4.12
CFR Part: 
CFR Title: 

Content:
cifications, 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. RSBSRXB reviews the vent system description to determine that the vent paths are 44 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. DRAFT Rev. 1 - April 1996 5.4.12-8 2. At RSBSRXB request, ICSBHICB reviews the instrumentation, vent controls, and 45 46 power source to establish that a single failure will not prevent isolation of the vent system. 3. RSBSRXB examines valve redundancy and other methods to minimize inadvertent 47 actuation. Comparisons of the methods to prevent inadvertent actuation should be made with other safety-related systems. 4. MTEBEMCB evaluates the vent system to determine that all requirements for the 48 reactor pressure boundary are met. 5. RSBSRXB examines the size of the vent line and orifices to see that they are smaller 49 than the LOCA definition. If vent path capacity is of LOCA size, a LOCA analysis shall be provided. 6. RSBSRXB determines that the areas of discharge for the vent system are capable of 50 withstanding all substances which may be vented. In addition CSBSCSB examines 51 these areas to see that adequate mixing with the containment atmosphere is provided. 7. RSBSRXB examines the description and P&IDs to assure that the vents are operable 52 from the control room and that power is supplied from emergency buses. 8. HFEBHHFB determines that the control room displays and controls for the RCS vent 53 system added to the control room as a result of this requirement do not increase the 54 potential for operator error. A human-factor analysis will be evaluated taking into consideration: (a) the use of this