ML25265A018

From kanterella
Jump to navigation Jump to search

Pre-Application Meeting: Limerick LAR for a One-Time Exception to Appendix J, Type C Tests and Relief Request for ASME Inservice Tests (Slides/Presentation)
ML25265A018
Person / Time
Site: Limerick Constellation icon.png
Issue date: 09/29/2025
From:
Constellation Energy Generation
To:
Division of Operating Reactor Licensing
Klett, AL
References
EPID L-2025-LRM-0128
Download: ML25265A018 (1)
v • d • e


Text

Pre-Application Meeting:

Limerick LAR for a One-Time Exception to Appendix J, Type C Tests and Relief Request for ASME Inservice Tests September 29, 2025

  • Introductions
  • Meeting Objectives
  • Background Information
  • Scope of Proposed Technical Specification Change and Relief Request
  • Justification
  • Corrective Maintenance and Test Results Li1R20 (Spring 2024)
  • Historical Results
  • Overview of Submittal Schedule
  • Summary and Wrap-up
  • Questions Agenda Limerick LAR for One-Time Exception of App. J Type C Tests and RR for ASME ISTs 1

Corporate Licensing Engineers -Lane Oberembt, Ronnie Reynolds Corporate Licensing Senior Manager - Wendi Para Limerick Regulatory Assurance Engineer - Renee Guy Limerick Regulatory Assurance Manager - Jordan Rajan Limerick Strategic Engineering - TBD Limerick In-Service and Appendix J Engineering - Evan Dimmerling Limerick Programs Engineering Manager - Marcellus Ruff Corporate In-Service Testing Engineer - Glenn Weiss Limerick Digital Modernization Project (DMP) - Brian Devine, Brian Wysowski Limerick Outage Management - Casey Coyle, Steve Deihm, Craig Hoffman, Vince Ferrizzi

Introductions

Limerick LAR for One-Time Exception of App. J Type C Tests and RR for ASME ISTs 2

  • Present information to the NRC to provide a clear understanding of the proposed Limerick License Amendment Request (LAR) and associated Relief Request (RR).

- LAR for a one-time exception of specified 10 CFR 50, Appendix J (App. J) Type C Local Leakage Rate Tests (LLRTs) until Spring 2028 refueling outage.

- Relief Request to extend performance of ASME Inservice Leakage Tests (IST) until Spring 2028 refueling outage.

  • Describe how the requests will support the safe and efficient installation of the DMP.
  • Explain the technical justification for the requests.
  • Obtain feedback from the NRC on the proposed LAR and RR to support development of a high-quality submittal and support efficient use of resources.
  • Establish a mutual understanding of the proposed schedule and corresponding need date to ensure adequate NRC resource availability.

Meeting Objectives Limerick LAR for One-Time Exception of App. J Type C Tests and RR for ASME ISTs 3

  • The DMP will be the largest analog to digital upgrade of the safety-related Plant Protection Systems (PPS) at an operating nuclear plant.

- ~ 1800 safety-related components being replaced by software functionalities.

  • The DMP is scheduled to be installed in Unit 1 during the spring of 2026 (Li1R21).

Background Information: DMP Limerick LAR for One-Time Exception of App. J Type C Tests and RR for ASME ISTs 4

  • Appendix J Program

- LGS, Unit 1 Technical Specification (TS) Amendment 118 (ML011560583) approved App. J, Option B performance-based testing.

- LGS, Unit 1 TS Amendment 241 (ML19351E376) approved the extension of App. J, Type C testing interval up to 75-months.

- LGS, Unit 1 approved Relief Request GVRR-8 (ML20280A757) allows Pressure Isolation Valve (PIV) leakage testing on extended frequency pending satisfactory IST leakage and App. J tests.

Background Information: Licensing Basis Limerick LAR for One-Time Exception of App. J Type C Tests and RR for ASME ISTs 5

Appendix J Type C Program Li1R20 App. J As-found leakage Li1R20 App. J As-left leakage ASME IST Program Li1R20 IST As-found leakage (TS Limit 1.0 gpm)

Li1R20 IST As-left leakage (TS Limit 1.0 gpm)

HV-052-108 (Admin Limit 3000 sccm)

Y Off-scale 150 sccm Y

Off-scale 0.01 gpm HV-051-1F015B (Admin Limit 5000 sccm)

Y 5,120 sccm N/A Y

0.0 gpm N/A HV-051-1F017B (Admin Limit 5000 sccm)

Y 18,000 sccm 100 sccm Y

0.08 gpm 0.01 gpm HV-051-1F027B (Admin Limit 5000 sccm)

Y 10,000 sccm 4,300 sccm N

N/A N/A Background Information: Spring 2024 Results Limerick LAR for One-Time Exception of App. J Type C Tests and RR for ASME ISTs 6

  • NEI 94-01 stipulates that when App. J, Type C test results are not acceptable, the testing frequency should be reset to the initial test interval (i.e., 30 months).
  • The LAR adds a Note to TS 6.8.4.g to permit a one-time exception from resetting the test interval to allow the App. J, Type C testing of four (4) valves HV-052-108, HV-051-1F015B, HV-051-1F017B, and HV-051-1F027B, to be deferred and completed no later than the Spring 2028 refueling outage (Li1R22).

Scope of Proposed Technical Specification Change Limerick LAR for One-Time Exception of App. J Type C Tests and RR for ASME ISTs 7

TS 6.8.4.g Primary Containment Leakage Rate Testing Program A program shall be established to implement the leakage rate testing of the containment as required by 10 CFR 50.54 (o) and 10 CFR 50, Appendix J, Option B, as modified by approved exemptions. This program shall be in accordance with the guidelines contained in NEI 94-01,"Industry Guideline for Implementing Performance-Based Option of 10 CFR 50, Appendix J," Revision 3-A, dated July 2012, and the Limitations and Conditions specified in NEI 94-01, Revision 2-A, dated October 2008*. The peak calculated containment internal pressure for the design basis loss of coolant accident, Pa, is 44.0 psig.

  • Note: A one-time exception from resetting the Type C test interval for valves: HV-052-108, HV-051-1F015B, HV-051-1F017B, and HV-051-1F027B has been approved in Amendment [XXX]. The Type C Test for the listed valves shall be performed no later than the end of the Spring 2028 refueling outage.

Scope of Proposed Technical Specification Change Limerick LAR for One-Time Exception of App. J Type C Tests and RR for ASME ISTs 8

  • The approved alternative in Relief Request GVRR-8 established a conservative control which stipulates that if any valve fails either the App. J, Type C or the ASME IST leakage tests, the interval for both tests would be reset to 2 years to be consistent with App. J, Option B requirement until good performance was reestablished.
  • The App. J, Type C leakage was above the Administrative Limit for three (3) valves, HV-052-108, HV-051-1F015B, and HV-051-1F017B, and the corresponding test interval for each valve was reset to two (2) years.
  • This RR is a one-time exception to GVRR-8 to defer resetting the test interval for the three valves listed above to allow the next ASME IST leak tests to be completed no later than completion of Li1R22 (Spring 2028).

Scope of Proposed Relief Request Limerick LAR for One-Time Exception of App. J Type C Tests and RR for ASME ISTs 9

  • Due to the complex nature of the DMP, the current Li1R21 outage plan intentionally excludes work on the B train of the ECCS.

- This allows alternate controls to be installed on B Train equipment to maintain adequate sources of Shutdown Cooling and Alternate Injection.

  • Performance of LLRTs and ISTs leakage tests on the four B Train valves would require alternate controls to be installed on the A Train of ECCS equipment.

- This must be done to maintain adequate nuclear safety.

- This transfer would be performed locally at the alternate controls and not from the Main Control Room Justification: Impact to the Plant during DMP Install Limerick LAR for One-Time Exception of App. J Type C Tests and RR for ASME ISTs 10

  • Historical satisfactory valve leakage performance.
  • Acceptable 2024 as-left Appendix J and IST Leakage Test results after maintenance performed.
  • Robust in-body maintenance procedures and practices by qualified technicians.

- Historical subsequent satisfactory leakage performance following maintenance.

  • MOV diagnostic testing and program requirements ensuring reliable performance and consistent seating force.
  • Alternate IST testing (valve exercising and stroke timing) will be performed in 2026 outage to demonstrate valve operational readiness.

Justification: Technical Limerick LAR for One-Time Exception of App. J Type C Tests and RR for ASME ISTs 11

  • HV-052-108

- Failed as-found App. J and ASME IST leakage tests

- In-body maintenance performed

- As-left App. J, Type C test leakage of 5% of its administrative limit

- As-left ASME IST leakage was 0.01 gpm, which is 1% of allowable leakage

  • HV-051-1F015B

- As-found App. J, Type C test leakage was slightly above the administrative limit, but Containment leakage rate was acceptable ( < 0.6La)

- As-found ASME IST leakage was 0.0 gpm Corrective Maintenance and Test Results Li1R20 (Spring 2024)

Limerick LAR for One-Time Exception of App. J Type C Tests and RR for ASME ISTs 12

  • HV-051-1F017B

- As-found App. J, Type C leakage above administrative limit.

- As-found ASME IST leakage was acceptable at 0.08 gpm

- In-body maintenance performed.

- As-left App. J, Type C test leakage 2% of its administrative limit

- As-left ASME IST leakage was 0.01 gpm, which is 1% of its allowable leakage

  • HV-051-1F027B (Non-IST Leakage Tested Valve)

- As-found App. J, Type C leakage above administrative limit.

- In-body maintenance performed.

- As-left App. J, Type C test leakage below the administrative limit.

- Observed linear indication on the seat documented on similar valve on Unit 2 and subsequent leakage tests have been acceptable.

Corrective Maintenance and Test Results Li1R20 (Spring 2024)

Limerick LAR for One-Time Exception of App. J Type C Tests and RR for ASME ISTs 13

HV-052-108 HV-051-1F015B HV-051-1F017B HV-051-1F027B App. J, Type C IST App. J, Type C IST App. J, Type C IST App. J, Type C IST Li1R19 (2022) 32.5 sccm 0.0 gpm 3300 sccm 0.17 gpm 8225 sccm 0.0 gpm 9750 sccm N/A Li1R18 (2020)

Note 1 Note 1 Note 1 Note 1 Note 1 Note 1 7100 sccm N/A Li1R17 (2018)

Note 1 Note 1 Note 1 Note 1 Note 1 Note 1 Note 1 N/A Li1R16 (2016) 20 sccm 0.1 gpm 102 sccm 0.1 gpm 443 sccm 0.0 gpm 4660 sccm N/A Li1R15 (2014) 20 sccm 0.0 gpm 1162.2 sccm 0.0 gpm 20 sccm 0.0 gpm 3720 sccm N/A Historical Test Results Limerick LAR for One-Time Exception of App. J Type C Tests and RR for ASME ISTs 14 Note 1 - Valve testing interval extended due to acceptable performance

  • LAR and RR submittal from CEG by early October 2025.
  • Request NRC approval by March 31, 2026, to support installation of the DMP in Li1R21 (Spring 2026).
  • Performance of the next App. J, Type C test for valves: HV-052-108, HV-051-1F015B, HV-051-1F017B, and HV-051-1F027B in Li1R22 (spring 2028).
  • Performance of the next ASME IST leakage test for valves: HV-052-108, HV-051-1F015B, and HV-051-1F017B in Li1R22 (spring 2028).

Overview of Submittal Schedule Limerick LAR for One-Time Exception of App. J Type C Tests and RR for ASME ISTs 15

  • Request exception to the Appendix J, Type C (LLRT) testing for valves HV-052-108, HV-051-1F015B, HV-051-1F017B, and HV-051-1F027B and Relief Request from ASME IST Leakage test for valves HV-052-108, HV-051-1F015B, and HV-051-1F017B to allow Limerick to focus on the safe and efficient installation of the Digital Modernization Project.
  • Performance of the Appendix J, Type C tests on the applicable valves will be included in Type C scope for refueling outage Li1R22 (spring 2028).
  • Performance of the ASME IST leakage tests on the applicable valves will be included in IST scope for refueling outage Li1R22 (spring 2028).

Summary and Wrap-up Limerick LAR for One-Time Exception of App. J Type C Tests and RR for ASME ISTs 16

Questions?

Limerick LAR for One-Time Exception of App. J Type C Tests and RR for ASME ISTs 17

Retrieved from "https://kanterella.com/w/index.php?title=ML25265A018&oldid=5533996"