Document: NUREG-0800
Document ID: 02f672d7-50e8-458f-90d4-e5eb19bd5a4d
Document Type: srp
Title: EMERGENCY DIESEL ENGINE COOLING WATER SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550035.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.5
CFR Part: 
CFR Title: 

Content:
necessary (i) to prevent fuel damage in anticipated operational occurrences and (ii) to maintain core cooling and containment integrity in postulated accidents. 6. GDC 44 requires a cooling system to transfer heat from SSCs important to safety to an ultimate heat sink. Requirements include suitable redundancy, interconnections, leak detection, and isolation capabilities for onsite power system operation if offsite power is not available. Typically, the emergency diesel generator system is the onsite electric power system relied upon when offsite power is unavailable. The EDECWS is integral to the emergency diesel generator system and transfers heat away from diesel engine components to the ultimate heat sink. GDC 44 provides assurance that important safety functions can be accomplished under normal operating and accident conditions. 7. GDC 45 requires design of cooling water systems for appropriate periodic inspection of important components like heat exchangers and piping to assure system integrity and capability. The EDECWS provides engine cooling for the emergency diesel generator which in turn provides emergency power to plant SSCs important to safety. Periodic EDECWS inspections/tests provide assurance that the system will function as designed to support operation of the onsite emergency power supply. 8. GDC 46 requires design of cooling water systems for appropriate periodic pressure and functional testing under conditions as close to design as practical. The EDECWS provides engine cooling for the emergency diesel generators which in turn provide emergency power to plant SSCs important to safety. Periodic EDECWS inspections/tests provide assurance that the system will function as designed to support operation of the onsite emergency power supply. III. REVIEW PROCEDURES The reviewer will select material from the procedures described below, as may be appropriate for a particular case. These review procedures are based on the identified SRP acceptance criteria.