Document: NUREG-0800
Document ID: 615ce987-401a-49b0-a317-08e4662db9df
Document Type: srp
Title: AUXILIARY AND RADWASTE AREA VENTILATION SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550039.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.4.3
CFR Part: 
CFR Title: 

Content:
s in the SAR that verify that the above conditions are met are acceptable. B. Components and subsystems necessary for preventing the release of radioactive contaminants can function as required in the event of a loss of offsite power. The system design is acceptable if the ARAVS meets minimum system requirements as stated in the SAR, assuming a failure of a single active component within the system itself or in the auxiliary electric power source which supplies the system. The SAR is reviewed to determine that for each ARAVS component or subsystem affected by the loss of offsite power, the resulting system flow capacity will not cause the loss of preferred direction of air flow from areas of low potential radioactivity to areas of higher potential radioactivity. Statements in the SAR and the results of failure modes and effects analyses are considered in verifying that the system meets these requirements. This will be an acceptable verification of system functional reliability. 4. The descriptive information, P&IDs, ARAVS drawings, and failure modes and effects analyses in the SAR are reviewed to ensure that essential portions of the system can function following design-basis accidents, assuming a concurrent, single, active failure. The reviewer evaluates the analyses presented in the SAR to ensure functioning of required components, traces the availability of these components on system drawings, and checks that the SAR contains verification that minimum system isolation or filtration requirements are met for each accident situation for required time spans. For each case the design is acceptable if it meets minimum system requirements. 5. For review of a DC application, the reviewer should follow the above procedures to verify that the design, including requirements and restrictions (e.g., interface requirements and site parameters), set forth in the final safety analysis report (FSAR) meets the acceptance criteria. DCs have referred to the FSAR as the design