ML24311A165
| ML24311A165 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 11/25/2024 |
| From: | Ngola Otto Plant Licensing Branch III |
| To: | Entergy Nuclear Operations |
| Wall S | |
| Shared Package | |
| ML24311A167 | List: |
| References | |
| EPID L-2024-LRM-0019 | |
| Download: ML24311A165 (1) | |
Text
November 25, 2024 LICENSEE:
Holtec Decommissioning International, LLC FACILITIES: Palisades Nuclear Plant
SUBJECT:
SUMMARY
OF OCTOBER 24, 2024, MEETING WITH HOLTEC DECOMMISSIONING INTERNATIONAL, LLC REGARDING GENERIC SAFETY ISSUE 191 CLOSURE PLAN TO SUPPORT POTENTIAL REAUTHORIZATION OF POWER OPERATIONS AT PALISADES NUCLEAR PLANT (EPID L-2024-LRM-0019)
On October 24, 2024, the U.S. Nuclear Regulatory Commission (NRC) staff held an open hybrid meeting with representatives of Holtec Decommissioning International, LLC (Holtec, the licensee) at 11555 Rockville Pike, Rockville, Maryland. The NRC staff, Holtec representatives, and members of the public also participated remotely via webinar. ENERCON representatives supported Holtec as technical consultants at the meeting. The meeting notice dated October 4, 2024, is available in the Agencywide Documents Access and Management System (ADAMS) at Accession No. ML24297A116. A list of attendees is provided as an Enclosure. Holtecs presentation is also available at ML24296B165.
The purpose of the meeting was for Holtec to discuss their plans to resume work at Palisades Nuclear Plant (PNP, Palisades) on NRC Generic Letter (GL) 2004-02 (ML042360586),
Potential Impact of Debris Blockage on Emergency Recirculation during Design Basis Accidents [DBAs] at Pressurized-water Reactors [PWRs], which is associated with Generic Safety Issue (GSI)-191, Assessment of Debris Accumulation on Pressurized Water Reactor Sump Performance. Additional goals for the meeting were for Holtec to provide a summary of PNP GL 2004-02/GSI-191 activities completed prior to cessation of power operations and update on the closure plan.
During the presentation, Holtec representatives highlighted completed actions performed at Palisades to address GL 2004-02, which include changes to the sump buffering agent from trisodium phosphate dodecahydrate to sodium tetraborate, replacement of high-pressure safety injection pump mechanical seals and cyclone separators, installation of passive debris screens on containment sump downcomers, containment floor drains, and containment sump vent lines, and installation of passive sump strainer assemblies with 0.095 hole size at emergency core cooling system pump suction inlet to containment sump and modification of the containment sump vents to enhance sump performance. Previous Palisades letters to the NRC regarding GL 2004-02 /GSI-191 plans were submitted on March 15, 2013 (ML13136A006), March 29, 2018 (ML18088A139) and March 5, 2019 (ML19064A089).
Regarding the current path for closure of GSI-191, Holtec explained that they had considered the deterministic resolution, alternate break resolution, and risk-informed resolution closure options for resolving GL 2004-02 as described in SECY-12-0093, (ML121320270) Closure Options for Generic Safety Issue -191. Per the discussion, the NRC staff expects Holtecs GL 2004-02 closure plan milestones and schedule submittal in the fourth quarter of 2024 and final response in the second quarter of 2026. The NRC staff plans to review Holtecs GL 2004-02/
GSI-191 closure plan submittals.
During the discussions with the NRC staff, Holtecs representatives confirmed that the containment sump is located under the annulus, and that debris would be prevented from getting into the annulus because of filtering by the strainers. Regarding the NRC staffs question about the alternate break and risk resolution, Holtec is still considering whether an alternate break or risk-informed method will be used for the final resolution. Regarding the NRC staffs question on the final closure plan, Holtec indicated that the plan would address justification for 8-hour chemical precipitation timing, difference in in-bag and out-of-bag series of chemical precipitation tests, the maximum debris amounts used in the head loss testing and would include all pertinent commitments. Holtec also confirmed that they plan to use Westinghouse Commercial Atomic Power (WCAP)-17788-P guidance.
There were several comments and questions from members of the public during the meeting.
The NRC staff addressed several questions during the question-and-answer session of the meeting. Comments and concerns include the need for simplified information for the public to understand, request for meeting to be recorded or transcribed, possible presence of problematic insulation types (e.g., Calcium silicate), sump pumps, impact of GSI-191 on restart, and opportunity for public response before restart.
No Public Meeting Feedback Forms were received.
Please direct any inquiries to me at 301-415-6695, or via email at Ngola.Otto@nrc.gov.
/RA/
Ngola Otto, Project Manager Licensing Project Branch Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-255
Enclosure:
List of Attendees cc: Listserv
Enclosure LIST OF ATTENDEES
SUMMARY
OF OCTOBER 24, 2024, MEETING WITH HOLTEC DECOMMISSIONING INTERNATIONAL, LLC REGARDING GENERIC SAFETY ISSUE 191 CLOSURE PLAN TO SUPPORT POTENTIAL REAUTHORIZATION OF POWER OPERATIONS AT PALISADES NUCLEAR PLANT NRC
Participants:
Jamie Pelton, Deputy Director, Office of Nuclear Reactor Regulation (NRR), Division of Operating Reactor Licensing (DORL)
Phil McKenna, Deputy Director, NRR, Division of Reactor Oversight (DRO)
Ashley Smith, Nuclear Engineer, Division of Safety Systems (DSS), Nuclear Methods and Fuel Analysis Branch (SFNB)
Robert Beaton, Senior Nuclear Engineer, DSS, Nuclear Systems Performance Branch (SNSB)
Charles Moulton, Fire Protection Engineer, Division of Risk Assessment (DRA), PRA Licensing Branch B (APLB)
Evan Davidson, Branch Chief, DRA, APLB Andrea Russell, Safety and Plant Systems Engineer, DSS, Technical Specifications Branch (STSB)
Paul Klein, Senior Material Engineer, Division of New Reactor Licensing (DNRL), Corrosion and Steam Generator Branch (NCSG)
Matthew Yoder, Senior Chemical Engineer, DNRL, NCSG Steve Smith, Senior Safety and Plant Systems Engineer, DSS, STSB Justin Poole, Branch Chief, NRR, DORL, Plant Licensing Branch 3 (LPL3)
Ed Miller, Senior Project Manager, NRR, DORL, LPL2-1 Ngola Otto, Project Manager, DORL, Licensing Projects Branch (LLPB)
Liam ODonoghue, DORL, LLPB Sophie Holiday, Senior Emergency Response Coordinator, Office of Nuclear Security and Incident Response, Division of Preparedness and Response, Coordination Branch Marlayna Doell, Project Manager, NMSS, Division of Decommissioning, Uranium Recovery, and Waste Programs, Reactor Decommissioning Branch Michael Spencer, Office of General Counsel April Nguyen, Region 3 (RIII), Division of Operating Reactor Safety (DORS)
Julie Winslow, RIII, DORS Viktoria Mitlyng, Senior Public Affairs Officer, RIII Prema Chandrathil, Public Affairs Officer, RIII Neil Sheehan, Public Affairs Officer, RI Holtec Decommissioning International, LLC:
Jean Fleming, Vice President of Licensing, Regulatory Affairs and PSA Jim Miksa, Regulatory Assurance Joe Jerz, Engineering Director Gregory Baustian, Palisades Licensing ENERCON Tim Sande, PRA Manager, GSI-191 SME Kyle Reno, Chief Mechanical Supervisor Blake Stair, Chemical Effects SME Haifeng Li, EG Mechanical Supervisor Public Terry Alsterda Kodaran Anand Jackson Barth Jana Bergman Alan Blind M Brown AJ Camacho Jason Casey Jacquelyn Drechsler Jazmin Flores Michael Gallagher David Hills Joy Jiang Anthony Jones Kevin Kamps Michael Keegan Lisa Kindschy Alexandra King Jody Riley Maynard Dominik Muszynski Jan OConnell Grace Pennington Autumn Pitchure Jeffrey Quinn Rachel Qian Kraig Schultz Dalton Sparks Blake Stair Carol Thompson Spencer Toohill Alexis Waiss Kalene Walker Gabriel Witter Kemper Young Jingren Zhou
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Package: ML24311A167 Meeting Slides: ML24296B165 Meeting Notice: ML24297A116 Meeting Summary: ML24311A165 NRC-001 OFFICE NRR/DORL/LLPB/PM NRR/DORL/LPL3/LA NRR/DORL/LPL3/BC(A) NRR/DORL/LPPB/PM NAME NOtto SRohrer RKuntz NOtto DATE 11/06/2024 11/20/2024 11/20/2024 11/25/2024