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:
ility of the environmental qualification of all vent system components is performed under SRP Section 3.11. 9. Review of technical specifications is performed under SRP Section 16.0. 10. Review of the human factors engineering for the control room portion of the vent system to ensure that personnel can operate the system in an error- free manner is performed under SRP Section 18.0. 11. For standard DCs and COLs, the organization responsible for the review of PRA submittals and severe accidents design features reviews the licensee’s assessment to ascertain that high-point vents should not lead to an unacceptable increase in the probability of LOCA accidents in SRP Chapter 19. 12. Quality assurance aspects are reviewed using the guidance of SRP Chapter 17. The specific acceptance criteria and review procedures are contained in the referenced SRP sections. II. ACCEPTANCE CRITERIA Requirements The objective of the review is to determine whether the vent system (1) is capable of removing noncondensible gases from the primary coolant system with a minimal probability of inadvertent or spurious actuation and (2) has been acceptably assessed with respect to causing a LOCA. Acceptance criteria are based on meeting the relevant requirements of the following Commission regulations: 1. 10 CFR 50.46a, as it relates to the provision of, and requirements related to, high-point vents for the RCS, the reactor vessel head, and other systems required to maintain adequate core cooling if the accumulation of noncondensible gases would cause the loss of function of these systems. 2. 10 CFR 50.46(b), as it relates to the long-term cooling of the core following any calculated successful initial operation of the emergency core cooling system (ECCS) to remove decay heat for an extended period of time. 3. 10 CFR 50.49, as it relates to environmental qualification of electrical equipment necessary to operate the reactor coolant vent system. 5.4.12-4 Revision 1 - March 2007 4. 10 CFR 50.55a