Document: NUREG-0800
Document ID: d804e0bf-cdaf-4241-8a9e-1eaa21d9ca1a
Document Type: srp
Title: ENGINEERED SAFETY FEATURES SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350475.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.3
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CFR Title: 

Content:
s based upon detailed design information that confirms that the final design conforms to the design bases and applicable criteria. The depth of the review for an OL application should be sufficient to conclude that the requirements of the Commission regulations have been satisfied. The depth of the review for the balance of the criteria applicable to the protection system should be sufficient to conclude that the systems conform with the guidelines to the extent required to support the findings of conformance to the regulatons. The review of the information presented and referenced in Section 7.3 of an SAR is directed to the engineered safety features actuation system (ESFAS) and the control systems which are used to regulate the operation of the ESF systems following their initiation by the ESFAS, i.e., the instrumentation and controls used to initiate and control the operation of the engineered safety features. Typical ESF systems are: Containment and Reactor Vessel Isolation Systems. Emergency Core Cooling Systems (ECCS) Containment Heat Removal and Depressurization Systems Pressurized Water Reactor (PWR) Auxiliary Feedwater Systems Boiling Water Reactor (BWR) Standby Gas Treatment Systems Containment Air Purification and Cleanup Systems Containment Combustible Gas Control Systems Typical EAS systems are: Electric Power Systems Diesel Generator Fuel Storage and Transfer Systems Instrument Air Systems Heating, Ventilating, and Air Conditioning (HVAC) Systems for ESF Areas Essential Service Water and Component Cooling Water Systems The scope of the ICSB review of Section 7.3 of an SAR includes: 1. The descriptive information, including functional control diagrams (CP), piping and instrument diagrams, and schematic diagrams (O) pertaining to the ESFAS. The ESFAS includes all electric and electromechanical equip- ment involved in detecting a plant condition requiring operation of an ESF or EAS system and in initiating the operation of the ESF or EAS system. 7.3-2