Document: NUREG-0800
Document ID: 16922d4c-3f36-4add-8a31-0ec35a44f030
Document Type: srp
Title: REACTOR COOLANT SYSTEM HIGH POINT VENTS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070770005.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.4.12
CFR Part: 
CFR Title: 

Content:
plicants must meet. Compliance with 10 CFR 50.46a assures that there is a means to exhaust gases from the RCS that might otherwise inhibit long-term cooling following an accident, thereby ensuring the establishment and maintenance of adequate reactor core cooling. 2. 10 CFR 50.46(b) establishes specific reactor core temperature, cladding oxidation, hydrogen generation, and cooling requirements that are designed to protect the fuel and fuel cladding. The RCS vent system supports long-term core cooling following an accident by exhausting gases from the primary system that could otherwise inhibit natural circulation or pump operation. 3. 10 CFR 50.49 requires environmental qualification of safety-related electrical equipment to ensure that such equipment operates satisfactorily in the most severe environment (i.e., temperature, humidity, radiation, etc.) that it may encounter. Since the RCS vent system contains safety-related electrical equipment that must operate in a post-LOCA containment environment, it must meet the environmental qualification rules. Meeting 10 CFR 50.49 will ensure that under the most severe conditions the vents will function as designed. 4. 10 CFR 50.55a, GDC 1, and GDC 30 require that systems be designed, built, tested, and maintained to the highest appropriate quality standards to assure they will satisfactorily perform their safety functions. The RCS vent system fulfills two vital safety functions in that it exhausts gases from the RCS to ensure the continuance of long-term core cooling and also acts as a part of the RCPB. Compliance with 10 CFR 50.55a, GDC 1, and GDC 30 ensures the application of quality standards in the design, construction, and maintenance of the RCS vent system, thus providing assurance that the system is able to perform its safety functions and that the integrity of the RCPB is maintained. 5. GDC 14 requires that all RCPB components be designed and constructed such that there is an extremely low probability that these