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Category:Letter
MONTHYEARML24312A2262024-11-0606 November 2024 Letter from C. Nelson, Michigan SHPO Regarding Palisades Nuclear Plant Architectural Survey ML24292A1572024-11-0505 November 2024 Ape Notification to Burt Lake Band Palisades ML24310A0142024-11-0505 November 2024 Ape Notification to Mackinac Bands of Chippewa Palisades ML24310A0132024-11-0505 November 2024 Ape Notification to Grand River Bands of Ottawa Indians Palisades ML24309A2032024-11-0404 November 2024 Ape Notification to Ottawa Tribe of Oklahoma Palisades ML24309A1972024-11-0404 November 2024 Ape Notification to Little Traverse Bay Bands of Odawa Indians Palisades ML24309A1982024-11-0404 November 2024 Ape Notification to Match E Be Nash She Wish Band of Pottawatomi Indians Palisades ML24309A1872024-11-0404 November 2024 Ape Notification to Grand Portage Band of Lake Superior Chippewa Palisades ML24309A2072024-11-0404 November 2024 Ape Notification to Quechan Tribe of the Fort Yuma Indian Reservation Palisades ML24309A1832024-11-0404 November 2024 Ape Notification to Bois Forte Band of the Minnesota Chippewa Tribe Palisades ML24309A2122024-11-0404 November 2024 Ape Notification to Sault Ste. Marie Tribe of Chippewa Indians Palisades ML24309A2042024-11-0404 November 2024 Ape Notification to Pokagon Band of Potawatomi Indians Palisades ML24292A0492024-11-0404 November 2024 Ape Notification to Bad River Band of the Lake Superior Tribe of Chippewa Indians Palisades ML24309A1932024-11-0404 November 2024 Ape Notification to Leech Lake Band of Ojibwe Palisades ML24309A2012024-11-0404 November 2024 Ape Notification to Mille Lacs Band of Ojibwe Palisades ML24309A1922024-11-0404 November 2024 Ape Notification to Lac Vieux Desert Band of Lk Superior Chippewa Indians Palisades ML24309A1892024-11-0404 November 2024 Ape Notification to Hannahville Indian Community Palisades ML24309A2002024-11-0404 November 2024 Ape Notification to Miami Tribe of Oklahoma Palisades ML24309A1952024-11-0404 November 2024 Ape Notification to Little River Band of Ottawa Indians Palisades ML24309A2112024-11-0404 November 2024 Ape Notification to Saint Croix Chippewa Indians of Wisconsin Palisades ML24309A1902024-11-0404 November 2024 Ape Notification to Lac Courte Oreilles Band of Lake Superior Chippewa Palisades ML24309A2022024-11-0404 November 2024 Ape Notification to Nottawaseppi Huron Band of the Potawatomi Palisades ML24309A1852024-11-0404 November 2024 Ape Notification to Citizen Potawatomi Nation Palisades ML24309A2142024-11-0404 November 2024 Ape Notification to White Earth Band of Minnesota Chippewa Tribe Palisades ML24309A2092024-11-0404 November 2024 Ape Notification to Red Lake Band of Chippewa Indians Palisades ML24309A1862024-11-0404 November 2024 Ape Notification to Forest County Potawatomi Community Palisades ML24309A1822024-11-0404 November 2024 Ape Notification to Bay Mills Indian Community Palisades ML24309A2052024-11-0404 November 2024 Ape Notification to Prairie Band Potawatomi Nation Palisades ML24309A2102024-11-0404 November 2024 Ape Notification to Saginaw Chippewa Indian Tribe of Michigan Palisades ML24309A2082024-11-0404 November 2024 Ape Notification to Red Cliff Band of Lake Superior Chippewa Indians Palisades ML24309A1992024-11-0404 November 2024 Ape Notification to Menominee Indian Tribe of Wisconsin Palisades ML24292A0072024-11-0404 November 2024 Ape Notification to Achp Palisades ML24309A1882024-11-0404 November 2024 Ape Notification to Grand Traverse Band of Ottawa and Chippewa Indians Palisades ML24309A1842024-11-0404 November 2024 Ape Notification to Chippewa Cree Indians of the Rocky Boys Reservation of Montana Palisades ML24309A1912024-11-0404 November 2024 Ape Notification to Lac Du Flambeau Band of Lake Superior Chippewa Indians Palisades ML24309A2132024-11-0404 November 2024 Ape Notification to Turtle Mountain Band of Chippewa Indians Palisades ML24309A2062024-11-0404 November 2024 Ape Notification to Prairie Island Indian Community Palisades PNP 2024-014, Request for USNRC to Rescind Approved Exemption Requests for 140.11(a)(4) and 50.54(w)(1), Reduction of Insurances2024-10-0909 October 2024 Request for USNRC to Rescind Approved Exemption Requests for 140.11(a)(4) and 50.54(w)(1), Reduction of Insurances PNP 2024-037, Response to Requests for Additional Information Regarding the Proposed Reauthorization of Power Operations Under Renewed Facility Operating License Number DPR-0202024-10-0404 October 2024 Response to Requests for Additional Information Regarding the Proposed Reauthorization of Power Operations Under Renewed Facility Operating License Number DPR-020 ML24267A2962024-10-0101 October 2024 Summary of Conference Call Regarding Steam Generator Tube Inspections ML24263A1712024-09-20020 September 2024 Environmental Request for Additional Information ML24240A1692024-09-18018 September 2024 Cy 2023 Summary of Decommissioning Trust Fund Status ML24219A4202024-09-12012 September 2024 Change in Estimated Hours and Review Schedule for Licensing Actions Submitted to Support Resumption of Power Operations (Epids L-2023-LLE-0025, L-2023-LLM-0005, L-2023-LLA-0174, L-2024-LLA-0013, L-2024-LLA-0060, L-2024-LLA-0071) IR 05000255/20244022024-09-0606 September 2024 Public: Palisades Nuclear Plant - Decommissioning Security Inspection Report 05000255/2024402 PNP 2024-029, Notice of Payroll Transition at Palisades Nuclear Plant2024-08-15015 August 2024 Notice of Payroll Transition at Palisades Nuclear Plant IR 05000255/20240022024-08-0909 August 2024 NRC Inspection Report No. 05000255/2024002 PNP 2024-030, Update Report for Holtec Decommissioning International Fleet Decommissioning Quality Assurance Program Rev. 3 and Palisades Transitioning Quality Assurance Plan, Rev 02024-08-0202 August 2024 Update Report for Holtec Decommissioning International Fleet Decommissioning Quality Assurance Program Rev. 3 and Palisades Transitioning Quality Assurance Plan, Rev 0 PNP 2024-032, Supplement to License Amendment Request to Revise Selected Permanently Defueled Technical Specifications Administrative Controls to Support Resumption of Power Operations2024-07-31031 July 2024 Supplement to License Amendment Request to Revise Selected Permanently Defueled Technical Specifications Administrative Controls to Support Resumption of Power Operations ML24206A0572024-07-25025 July 2024 PRM-50-125 - Letter to Alan Blind; Docketing of Petition for Rulemaking and Sufficiency Review Status (10 CFR Part 50) PNP 2024-033, Response to Request for Additional Information - License Amendment Request to Revise the Palisades Nuclear Plant Site Emergency Plan to Support Resumption of Power Operations2024-07-24024 July 2024 Response to Request for Additional Information - License Amendment Request to Revise the Palisades Nuclear Plant Site Emergency Plan to Support Resumption of Power Operations 2024-09-06
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Text
Entergy Nuclear Operations, Inc.
Palisades Nuclear Plant
'27780 Blue Star Memorial Highway Covert, Ml 49043 Tel 269 764 2000 Thomas P. Kirwin Acting Site Vice President December 20, 2010 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001
SUBJECT:
Updated Palisades Reactor Vessel Pressurized Thermal Shock Evaluation Palisades Nuclear Plant Docket 50-255 License No. DPR-20
References:
- 1. Palisades Nuclear Plant, Application for Renewed Operating License, dated March 22, 2005 (Accession No. ML050940429).
- 2. Consumers Energy letter to the NRC, "Palisades Reactor Vessel Neutron Fluence Reevaluation," dated February 21, 2000, (Accession No. ML003686516).
Dear Sir or Madam:
The Palisades Nuclear Plant (PNP) license renewal application (Reference 1) stated that the RTPTS value for the PNP limiting reactor vessel (RV) welds is projected to reach the 10 CFR 50.61 pressurized thermal shock (PTS) screening criterion limit prior to the end of the license renewal period. That projection was based on a previous analysis (Reference 2) that determined the RTPTS values for the PNP vessel beltline materials using RV fluence and materials information available at that time. The limiting welds, which are the beltline axial welds fabricated with weld wire heat no. W5214, were projected to reach the PTS screening criterion limit in 2014.
New information is available that will affect the date when the PTS screening criterion limit is reached and, per the requirements in 10CFR50.61, the information must be reported if it improves the accuracy of the RTPTS value. The vessel fluence and RTPTS values have been reevaluated to ensure that vessel embrittlement is being managed and
,reported as required. This letter provides the new information and specifies future actions for compliance with the NRC regulations regarding PTS. This issue is being addressed under 10 CFR 54.21(c)(1)(iii), which requires that the effects of aging be managed for the period of extended operation.
Document Control Desk Page 2 Subsequent to the license renewal application, the NRC published 10 CFR 50.61a, "Alternate Fracture Toughness Requirements for Protection Against Pressurized Thermal Shock Events." This new alternative for PTS management "
involves inspecting the RV beltline region, determining limiting RTMAx-x values for each axial and circumferential weld, plate, and forging, and submitting a report to NRC to justify continued operation using the PTS screening criteria in Table 1 of 10 CFR 50.61a. The new regulation requires that an application for implementation of 10 CFR 50.61a be submitted at least three years before the limiting RTPTS value calculated under 10 CFR 50.61 is projected to exceed the PTS screening criteria.
Entergy Nuclear Operations, Inc. (ENO) will inspect the RV beltline region during the 2012 refueling outage. Afterward, ENO Will calculate RTMAX-X values for each RV beltline material and to submit a report to NRC to justify continued operation using the alternative PTS screening criteria in Table 1 of 10 CFR 50.61a. Submittal of an application for implementation of 10 CFR 50.61a will occur no less than three years before the limiting axial welds fabricated with weld wire heat no. W5214 are projected to reach the 10 CFR 50.61 PTS screening criterion limit.
On June 22, 2010, ENO staff met with the NRC to share the preliminary results of an updated PTS evaluation for the limiting axial welds fabricated with weld wire heat no. W5214. This updated PTS evaluation credits new surveillance capsule data and concludes that the axial welds fabricated with weld wire heat no. W5214 will not reach the PTS screening criteria limit until April.2017.
During the meeting, ENO agreed to submit updated PTS evaluations for the RV beltline materials in order to document compliance with 10 CFR 50.61 requirements in the interim until the 10 CFR 50.61a RV inspection is completed, the RTMAx-x values for each RV beltline materials are determined, and the ENO application to implement 10 CFR 50.61a is reviewed and approved by the NRC.
Accordingly, Attachment 1 and Attachment 2 of this letter transmit the following updated PTS evaluations for the PNP RV beltline materials:
- 1. Structural Integrity Associates, Inc. (SIA) Report No. 0901132.401, "Evaluation of Surveillance Data for Weld Heat No. W5214 for Application to Palisades PTS Analysis"
- 2. SIA Report No. 1000915.401, "Revised Pressurized Thermal Shock Evaluation for the Palisades Reactor Pressure Vessel" These two updated PTS evaluations have been reviewed by Westinghouse Electric Company, Nuclear Services.
Document Control Desk Page 3 The updated PTS evaluations are supported by Attachment 3, WCAP-15353-NP, Revision 0, Supplement 1, entitled "Palisades Reactor Pressure Vessel. Fluence Evaluation."
The updated PTS evaluations for the reactor beltline materials conclude that the 10 CFR 50.61 PTS screening criteria will not be reached until. April 2017. to this letter provides background information, a description of the proposed changes, and an evaluation discussion.
The attachments contain no proprietary information.
ENO requests that the NRC complete review and approval of the revised PTS evaluations and endorse the-new date at which the RV is estimated to reach the PTS screening criteria.
ENO plans to use the chemistry factors in the PTS evaluations for generation.of revised primary coolant system pressure-temperature curves under 10 CFR 50 Appendix G, and. plans to submit revised pressure-temperature curves to the NRC in early 2011.
Summary of Commitments This letter identifies two (2) new commitments and no revisions to existing.
commitments.' Refer to Attachment 5.
I declare under penalty of perjury that the foregoing is true and correct. Executed.on December 20, 2010.
Sincerely, tpk/jse
Document Control Desk Page 4 Attachments: 1. Structural Integrity Associates, Inc. Report No. 0901132.401, Evaluation of Surveillance Data for Weld Heat No. W5214 for Application to Palisades PTS Analysis
- 2. Structural Integrity Associates, Inc. Report No. 1000915.401, Revised Pressurized Thermal Shock Evaluation for the Palisades Reactor Pressure Vessel
- 3. WCAP-15353-NP, Revision 0, Supplement 1, Palisades Reactor Pressure Vessel Fluence Evaluation
- 4. Background Information, Description of Proposed Changes, and Evaluation Discussion
- 5. Description of Commitments cc: Administrator, Region III, USNRC Project Manager, Palisades, USNRC Resident Inspector, Palisades, USNRC