ML19025A307
| ML19025A307 | |
| Person / Time | |
|---|---|
| Site: | Nuclear Energy Institute |
| Issue date: | 01/28/2019 |
| From: | Nuclear Energy Institute |
| To: | Division of Licensing Projects |
| Paige J, NRR/DLP, 415-1474 | |
| Shared Package | |
| ML19025A311 -Pkg. | List: |
| References | |
| Download: ML19025A307 (14) | |
Text
©2018 Nuclear Energy Institute NEI DI&C Working Group Digital I&C Strategy January 31, 2019 NRC Public Meeting
©2018 Nuclear Energy Institute 2 Incorporate defined boundaries Apply risk-informed insights Leverage robust design processes Capitalize on international operational experience and standards Overarching Principles
©2018 Nuclear Energy Institute 3 Identify desired outcomes Identify barriers to progress Propose solutions to overcome barriers Summary Discussion topics
©2018 Nuclear Energy Institute 4 Utilities successfully design, develop, implement, and license digital upgrades to protection and control systems to support plant modernization and improve plant safety and reliability What does the end look like?
©2018 Nuclear Energy Institute 5 BTP 7-19 guidance has evolved over the years and expanded the scope of the SRM-SECY-93-087 policy Concerns with SRM-SECY-93-087:
Deterministic solutions to mitigate the potential for CCF Outdated and not aligned with current DI&C technology Barrier #1 - Common Cause Failure (CCF)
©2018 Nuclear Energy Institute 6 Revise BTP 7-19 to be consistent with the concepts and scope of CCF treatment as described in Revision 4, a more risk-informed and graded approach Develop a Digital I&C Policy that reflects a more risk-informed and graded approach to safety Employ concepts from the EPRI Digital Engineering Guide, which leverages principles from International Electrotechnical Commission (IEC) Standards Solution #1 - CCF
©2018 Nuclear Energy Institute 7 Solution #1 - Potential Solutions to CCF Safety Related (Protection)
Safety Related (Non-Protection)
Non-Safety Related Short Term Industry Guidance Standardized Digital Design Process EPRI Technical Guidance Standardized Digital Design Process EPRI Technical Guidance RIS 2002-22 Supp. 1 Standardized Digital Design Process EPRI Technical Guidance RIS 2002-22 Supp. 1 Short Term NRC Review Guidance BTP 7-19, Revision 4 Concepts RIS 2002-22 Supp. 1 No Changes Needed Long Term Industry Guidance Standardized Digital Design Process NEI YY-XX link to EPRI Technical Guidance Standardized Digital Design Process NEI YY-XX link to EPRI Technical Guidance Standardized Digital Design Process NEI YY-XX link to EPRI Technical Guidance Long Term NRC Review Guidance Approval of NEI YY-XX Develop DI&C Commission Policy Content of RIS 2002-22, Supp. 1 Captured as Durable Guidance No Changes Needed
©2018 Nuclear Energy Institute 8 Software development standards for safety-related SSCs are not commensurate with safety and not aligned with current technology BTP 7-14 Guidance does not follow a graded and risk-informed approach Barrier #2 - Software Development Standards and Guidance
©2018 Nuclear Energy Institute 9 Consider guidance from international standards associated with safety-related software development Revise BTP 7-14 to follow a graded and risk-informed approach that is flexible (i.e., not constrained to prescriptive adherence)
Leverage digital I&C operating experience from the international nuclear community (e.g., Électricité de France)
Solution #2 - Software Development Standards and Guidance
©2018 Nuclear Energy Institute 10 Chapter 7 of the Standard Review Plan (SRP) has fragmented and incomplete review guidance for I&C system architectures Barrier #3 - I&C System Architecture Development
©2018 Nuclear Energy Institute 11 Consider international guidance related to the design and development of I&C system architectures Employ concepts from the EPRI Digital Engineering Guide (DEG)
Solution #3 - I&C System Architecture Development
©2018 Nuclear Energy Institute 12 Insufficient guidance on limited functionality I&C devices Barrier #4 - Limited Functionality I&C Devices
©2018 Nuclear Energy Institute 13 Consider international guidance associated with limited functionality I&C devices Solution #4 - Limited Functionality I&C Devices
©2018 Nuclear Energy Institute 14 Strategy is outcome oriented Proposed solutions overcome barriers Leverage international successes in DI&C Alignment with NRC initiatives and principles Summary