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:
to protect the drywell and wetwell (or containment) of Mark I, II, and III, and ABWR plants, and the operating deck of Mark II plants, against loss of 49 integrity from negative pressure transients or postaccident atmosphere cooldown: a. Structures should be designed to withstand the maximum calculated external pressure. b. Vacuum relief devices should be provided in accordance with the requirements of the ASME Boiler and Pressure Vessel Code, Section III, Subsection NE (Reference 21) , to assure that the external design pressures of the structures are 50 not exceeded. The vacuum relief valve guidelines are set forth in Appendix A to this SRP section. g7. In meeting the requirements of General Design Criterion 50, with respect to design margin for item 6f above, the external design pressures of the structures, including the 51 design upward deck differential pressure for Mark II plants, should provide an adequate 6.2.1.1.C-7 DRAFT Rev. 7 - April 1996 margin above the maximum calculated external pressures to account for uncertainties in the analyses. h8. The acceptability of the reactor coolant system safety/relief valve in- plant confirmatory test program shall be based on conformance with the guidelines specified in Section 6, 7, and 8 of NUREG-0763 (Reference. 1d) . If the applicant/licensee elects not to perform 52 the SRV in-plant tests, the acceptability of this exception shall be determined in conformance with the guidelines specified in Section 4 of NUREG-0763. i9. For BWR pressure-suppressionMark I, II and III plants, the local suppression pool 53 temperature should not exceed 93 C (200 F) or the acceptance criteria specified in 54 Section 5.1 of NUREG-0783 (Reference. 1f) . 55 j10. In meeting the requirements of General Design Criteria 13 and 64, and 10 CFR 50.34(f)(2)(xvii) (for those applicants subject to 10 CFR 50.34(f)), instrumentation 56 capable of operating in the post-accident environment should be provided to monitor the containment atmosphere