Document: NUREG-0800
Document ID: 4a295d6b-937a-429e-8fe4-1470b992d859
Document Type: srp
Title: Rev. 0 – November 2009
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0929/ML092950353.pdf
Revision Date: 2023-06
Chapter: 18
Section ID: 18
CFR Part: 
CFR Title: 

Content:
vent simulations for the ISV include a range of representative CCF and digital failure modes, postulated HSI failures, and operational conditions in which credited actions may be required. Performance Times • For each AOO/PA, the mean performance time of the crews is less than or equal to the estimated time required derived from the analysis phase. • For each AOO/PA, the performance time for each crew, including margin determined in the time required analysis, is less than the analyzed time available. PHASE 4: MAINTAINING LONG-TERM INTEGRITY OF CREDITED MANUAL ACTIONS IN THE D3 ANALYSIS 4.A. Method Among other factors, changes in plant design, EOPs, and operator training can affect the ability of operators to correctly and reliably perform manual actions. Accordingly, the vendor/ licensee/applicant should establish a strategy for long-term monitoring of operator ability to reliably perform the manual operator actions credited in a D3 analysis. The scope of the performance monitoring strategy should provide adequate assurance that integrated system performance will be maintained within the bounds established by the ISV and continue to support the associated D3 analysis. There is no expectation for the vendor/licensee/applicant to periodically repeat the full ISV; however, there should be sufficient controls to provide reasonable confidence that operators will maintain the skills necessary to accomplish the credited actions. The results of the monitoring need not be reported to the NRC, but should be retained onsite for inspection. Consistent with 10 CFR Part 50, Appendix B, Criterion III, “Design Control,” Criterion V, “Instructions, Procedures and Drawings,” and Criterion VI, “Document Control,” the vendor/licensee/applicant should have in place sufficient configuration and design controls to 18-A-11 Rev. 0 – November 2009 assure that procedure steps that direct the credited action are administratively protected from inadvertent change, and that