ML18163A356

June 13-14, 2018, Meeting Slide for DI&C-ISG-06 Revision 2 Tabletop Lessons Learned from Pilot Project Experiences

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

• FSAR Event (AOO/PA)

• Automated Protection Function

• Credited Trip/Actuation Signals

• Interlock / Permissive / Override

• Variable(s)

• Condition for Interlock / Permissive /

• Range Override Function

• Nominal (100% RTP) Analytical Limit

• Response Time Assumed in FSAR Event

• Number of Channels Analysis

• Logic 8

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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