Document: NUREG-0800
Document ID: 010ad62f-cd7b-4f06-9f81-a781faf5701b
Document Type: srp
Title: ENGINEERED SAFETY FEATURE VENTILATION SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070560.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.4.5
CFR Part: 
CFR Title: 

Content:
plemented in the final design as set forth in the final safety analysis report. The primary reviewer will coordinate this review with the other branches' areas of review as stated in subsection I. The primary reviewer obtains and uses such inputs as required to assure ensure that this review procedure is complete. As a result of various ESFVS designs proposed by applicants, there will be variations in system requirements. For the purpose of this SRP section, a typical system is assumed which has fully redundant subsystems, each having an identical essential (safety features) portion. For cases where there are variations from this typical arrangement, the reviewer would adjust the review procedures given below. However, the system design would be required to meet the acceptance criteria given in subsection II. The reviewer will select and emphasize material from this SRP section as may be appropriate for a particular case. 1. The SAR is reviewed to verify that the system description and piping and instrumentation diagrams (P&IDs) show the ESFVS equipment used for normal operation, and the ambient temperature limits for the areas serviced. The system performance requirements are reviewed to determine that they limit allowable component operational degradation (e.g., loss of function, damper leakage) and describe the procedures that will be followed to detect and correct these conditions. The reviewer, using results from failure modes and effects analyses as appropriate, will determine that the safety-related portion of the system is capable of sustaining the failure of any active component. DRAFT Rev. 3 - April 1996 9.4.5-10 2. The system P&IDs, layout drawings, and component descriptions and characteristics are then reviewed to determine that: a. Essential portions of the ESFVS are correctly identified and are isolatable from nonessential portions of the system. The P&IDs are reviewed to verify that they clearly indicate the physical divisions between such portions