Document: NUREG-0800
Document ID: a28650b3-fa03-428d-a2bd-4a27f583710b
Document Type: srp
Title: NUREG-0800
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070484.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6
CFR Part: 
CFR Title: 

Content:
efined in Position B.1 above. For Mark I containment the acceptance criterion is that the measured leakage is not greater than the leakage that could result from a 2.54 cm (one inch) diameter opening. 112 d. Surveillance Requirements A visual inspection should be conducted to detect possible leak paths at each refueling outage. Each vacuum relief valve and associated piping should be checked at this time to determine that it is clear of foreign matter. 3. Vacuum Relief Valve Requirements a. Position Indicators and Alarms Redundant position indicators should be placed on all vacuum breakers with redundant indication and an alarm in the control room. The vacuum breaker position indicator system should be designed to provide the plant operators with continuous surveillance of the vacuum breaker position. The indicators should have adequate sensitivity to detect a total valve opening, for all valves, that is less than the bypass capability for a small break (Note for Mark I: this corresponds to the acceptance criteria described in 2.c above). The detectable valve opening should be based on the assumption that the valve opening is evenly divided among all the vacuum breakers. b. Vacuum Valve Operability Tests All vacuum breakers should be operability tested at monthly intervals to assure free movement of the valves. C. Implementation This position will be applied in the review of all CP, DC and OL applications with Mark I, 113 Mark II and Mark III containments (see also subsection V of this SRP section). The positions of Revision 2this revision to Appendix A of this SRP section does not apply to plants with an operating license issued prior to January 1983operating reactors. 114 6.2.1.1.C-17 DRAFT Rev. 7 - April 1996 Appendix B to SRP Section 6.2.1.1.C Summary of Mark II LOCA-Related Pool Dynamic Loads 115 The Mark II program to establish LOCA-related pool dynamic loads has been in existence since April 1975. Since that time, a number of different load specifications