ML18163A356
| ML18163A356 | |
| Person / Time | |
|---|---|
| Site: | Nuclear Energy Institute |
| Issue date: | 06/13/2018 |
| From: | Nuclear Energy Institute |
| To: | Office of Nuclear Reactor Regulation |
| Golla J | |
| References | |
| Download: ML18163A356 (10) | |
Text
DI&C-ISG-06 Revision 2 Table Top Lessons Learned from Pilot Project Experiences 1
Introduction
- Captured Key Insights from Pilot Experiences
- Show How Key Lessons Learned were Incorporated into New DI&C-ISG-06 Revision 2 Guidance
- Identify Additional Lessons Learned to be Addressed in Industry Guidance for DI&C-ISG-06 Revision 2 2
Key Insights from Pilot Experiences (1/2)
- Diablo Canyon had key insights for lessons learned:
- Role of architecture decisions affecting system test requirements
- Allocation of system functional requirements to vendor subsystems
- Treatment of maintenance needs in system functional requirements
- Vendor understanding of system functional requirements by design and V&V personnel (Reference ADAMS Accession No. ML15181A063) 3
Key Insights from Pilot Experiences (2/2)
- Oconee project had key insights for lessons learned:
- Role of architecture decisions affecting combination of echelons, use of inter-channel communication, and service unit connections
- Expectations for licensee oversight of vendor activities (Reference ADAMS Accession No. ML060060427)
- NRC key insights for lessons learned:
- There is no direct correlation between the information licensees are required to provide and the evaluations NRC performs (Reference ADAMS Accession No. ML15183A284) 4
Key Lessons Learned Incorporated into New DI&C-ISG-06 Revision 2 Guidance (1/2)
- There is an expanded discussion of expectations for licensee oversight of vendors in DI&C-ISG-06 Revision 2 Sections C.2.1, C.2.2, and D.5.1.2
- There is an expanded discussion of expectations for technical information to be provided related to system architecture features, system interfaces, and fundamental design principles in DI&C-ISG-06 Revision 2 Sections D.2.2, D.2.3, D.2.5, and D.2.6 5
Key Lessons Learned Incorporated into New DI&C-ISG-06 Revision 2 Guidance (2/2)
- There is an expanded discussion of expectations for technical information to be provided related to system requirements function allocation in DI&C-ISG-06 Revision 2 Section D.2.4
- There is an expanded discussion of expectations for technical information to be provided related to maintenance activities in DI&C-ISG-06 Revision 2 Sections D.2.2, D.2.3.3.1, and D.2.5.1 6
Key Lessons Learned to be Addressed in DI&C-ISG-06 Revision 2 Industry Guidance (1/2)
- There will be expanded guidance to address DI&C-ISG-06 Revision 2 Section D.4 for range of cases:
- Vendor Software Program Manual Available
- Vendor Application Methodology Reviewed with Plant Specific Follow-up Actions
- Application-Specific Approach
- There will be expanded guidance to address vendor oversight plans 7
Key Lessons Learned to be Addressed in DI&C-ISG-06 Revision 2 Industry Guidance (2/2)
- There will be expanded guidance to address Sections D.2.3 and D.4.2.1.1 for plant and I&C system safety analysis to provide summary information to support vendor design, V&V, oversight, and regulatory reviews verification
- There will be guidance for a new Safety Function Summary Table to define design basis and to highlight changes 8
FSAR Event (AOO/PA)
Credited Trip/Actuation Signals Variable(s)
Range Nominal (100% RTP) Analytical Limit Number of Channels Logic Automated Protection Function Interlock / Permissive / Override Condition for Interlock / Permissive /
Override Function Response Time Assumed in FSAR Event Analysis
Conclusions
- New DI&C-ISG-06 Revision 2 Guidance Addresses Key Lessons Learned from Pilot Experiences
- New Guidance Has Direct Correlation between information to be Provided and NRC Regulatory Evaluations
- Industry Guidance for DI&C-ISG-06 Revision 2 will Capture Additional Insights from Table Top Exercise 9
Closing
- Questions?
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