ML21034A603: Difference between revisions

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{{#Wiki_filter:Leveraging Regulatory And Technical Initiatives For Digital Transformation of Limerick Station John Connelly Engineering Manager - Limerick Modernization Project
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Problem Statement:
* Original construction safety systems are reaching the end of their practical service life - performance issues are becoming more common and costs to maintain these systems is rapidly increasing
* Historical regulatory barriers have largely precluded modernization of safety systems
* The industry is facing unprecedented economic challenges and must find innovative ways to reduce labor and material costs In 2019, a public / private partnership was formed between Idaho National Labs and Exelon to deconstruct daily activities to the determine the real cost of maintaining the I&C status quo and identify opportunities to reduce cost and further improve safety and performance 2
 
Transformation Framework
* Both the research and execution of the Limerick Transformation Project is founded on multiple technical and regulatory initiatives including:
  -NRC integrated action plan for digital modernization (SECY-15-01062) including ISG-6, Alternate Review Plan
  -EPRI Digital Engineering Guide (3002011816) and subordinate processes
  -EPRI Nuclear Plant Modernization Strategy (3002018428)
  -DNP Standard Digital Engineering Process (NISP-EN-04)
This strategy was deliberately structured to maximize efficiency, bring advanced analytical tools to bear and make the public facing research transportable to any utility that seeks to pursue similar initiatives 3
 
Key Takeaways
* Four safety-related systems at Limerick Station are within project scope:
      - Reactor Protection System (RPS)
      - Redundant Reactivity Control System (RRCS)
      - Nuclear Steam Supply Shutoff System (NSSSS)
      - Emergency Core Cooling System (ECCS)
* Approximately 75% of physical components are displaced by software which does not degrade over time and requires minimal ongoing maintenance
* Significant changes will be made to the control room to improve situational awareness and maximize information available to operators
* All four systems will be upgraded in a single, standard duration refueling outage 4
 
Current Control Room Configuration End-state Control Room Configuration ALARM      ALARM  ALARM      ALARM        ALARM DISPLAY    DISPLAY DISPLAY    DISPLAY    DISPLAY ROD POSITION &
OVATION OVATION DISPLAY                                                Reserved for RG OVATION        OVATION        OVATION              1.97 DISPLAY                DISPLAY        DISPLAY        DISPLAY}}

Revision as of 07:36, 18 January 2022

External Presentation Am Connelly_ISG-6 Workshop Presentation
ML21034A603
Person / Time
Site: Limerick  Constellation icon.png
Issue date: 02/03/2021
From: Connelly J
Exelon Generation Co
To:
Office of Nuclear Reactor Regulation
C. Cheung 301-415-3813
References
Download: ML21034A603 (6)
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