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| | issue date = 09/13/2012 | | | issue date = 09/13/2012 |
| | title = Response to Requests for Additional Information (RAI) Associated with Adoption of the Alternative Source Term (AST) Methodology | | | title = Response to Requests for Additional Information (RAI) Associated with Adoption of the Alternative Source Term (AST) Methodology |
| | author name = Molden J E | | | author name = Molden J |
| | author affiliation = Northern States Power Co, Xcel Energy | | | author affiliation = Northern States Power Co, Xcel Energy |
| | addressee name = | | | addressee name = |
Letter Sequence Response to RAI |
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TAC:ME2609, Control Room Habitability, Deletion of E BAR Definition and Revision to RCS Specific Activity Tech Spec (Approved, Closed) TAC:ME2610, Control Room Habitability, Deletion of E BAR Definition and Revision to RCS Specific Activity Tech Spec (Approved, Closed) |
Results
Other: L-PI-10-076, Calculation No. GEN-PI-083, Revision 1, Locked Rotor Accident (LRA) Analysis Using AST, Attachment 5, L-PI-11-060, Response to Requests for Additional Lnformation (RAI) Associated with Adoption of the Alternative Source Term (AST) Methodology, L-PI-11-079, Response to Requests for Additional Lnformation (RAI) Associated with Adoption of the Alternative Source Term (AST) Methodology, L-PI-13-111, Notification of Alternative Source Term (AST) Implementation and Unit 2 Steam Generator Replacement, ML102300296, ML102300297, ML102300298, ML111822669
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MONTHYEARL-PI-09-114, License Amendment Request to Adopt the Alternative Source Term Methodology2009-10-27027 October 2009 License Amendment Request to Adopt the Alternative Source Term Methodology Project stage: Request ML0935704512009-12-23023 December 2009 Acceptance Review of LAR to Adopt Alternative Source Term Methodology (TAC Nos. ME2609 & ME2610) Project stage: Acceptance Review L-PI-10-041, Response to Requests for Additional Information License Amendment Request to Adopt the Alternative Source Term Methodology2010-04-29029 April 2010 Response to Requests for Additional Information License Amendment Request to Adopt the Alternative Source Term Methodology Project stage: Response to RAI L-PI-10-046, Response to Requests for Additional Lnformation License Amendment Request to Adopt the Alternative Source Term Methodology2010-05-25025 May 2010 Response to Requests for Additional Lnformation License Amendment Request to Adopt the Alternative Source Term Methodology Project stage: Request L-PI-10-054, Response to Requests for Additional Information License Amendment Request to Adopt the Alternative Source Term Methodology2010-06-23023 June 2010 Response to Requests for Additional Information License Amendment Request to Adopt the Alternative Source Term Methodology Project stage: Response to RAI L-PI-10-076, Calculation No. GEN-PI-083, Revision 1, Locked Rotor Accident (LRA) Analysis Using AST, Attachment 52010-07-23023 July 2010 Calculation No. GEN-PI-083, Revision 1, Locked Rotor Accident (LRA) Analysis Using AST, Attachment 5 Project stage: Other ML1023002982010-07-23023 July 2010 Calculation No. GEN-PI-082, Revision 1, Control Rod Ejection Accident - AST, Attachment 4 Project stage: Other ML1023002972010-07-23023 July 2010 Calculation No. GEN-PI-081, Revision 1, Eab, LPZ, and CR Doses Due to Steam Generator Tube Rupture Accident - AST, Attachment 3 Project stage: Other ML1023002962010-07-23023 July 2010 Calculation No. GEN-PI-078, Revision 1, Main Steam Line Break (MSLB) Accident Analysis Using AST, Attachment 2 Project stage: Other ML1022200872010-08-10010 August 2010 Forthcoming Meeting with Northern States Power Company - Minnesota (Nspm), to Discuss the Prairie Island Nuclear Generating Plant Steam Generator Margin-to-Overfill Analysis as It Relates to Pingp'S License Amendment Request to Adopt... Project stage: Meeting ML1023002952010-08-12012 August 2010 Response to Requests for Additional Information License Amendment Request to Adopt the Alternative Source Term Methodology Project stage: Response to RAI ML1023805712010-08-25025 August 2010 Meeting Presentation Alternative Source Term Steam Generator Tube Rupture Margin to Overfill Evaluation - Prairie Island Nuclear Generating Plant Project stage: Request ML1025903972010-09-23023 September 2010 Prairie Island, Summary of Meeting with Northern States Power Company to Discuss the Alternative Source Term License Amendment Request Project stage: Meeting ML1032205572010-11-15015 November 2010 Draft RAI Concerning AST SGTR Mto Analysis Project stage: Draft RAI ML1032205552010-11-15015 November 2010 Draft RAI Concerning AST SGTR Mto Analysis Project stage: Draft RAI L-PI-10-112, Prairie Lsland Nuclear Generating Plant Units 1 and 2, Response to Request for Additional Information License Amendment Request to Adopt the Alternative Source Term Methodology (TAC Nos. ME2609 and ME26102)2010-12-17017 December 2010 Prairie Lsland Nuclear Generating Plant Units 1 and 2, Response to Request for Additional Information License Amendment Request to Adopt the Alternative Source Term Methodology (TAC Nos. ME2609 and ME26102) Project stage: Response to RAI ML1110400212011-04-0404 April 2011 NRR E-mail Capture - Prairie Island - Revised Alternative Source Term LAR Draft RAI 4-4-2011 Project stage: Draft RAI ML1035404332011-05-12012 May 2011 Requests for Additional Information (RAI) Associated with Adoption of the Alternative Source Term Project stage: RAI L-PI-11-060, Response to Requests for Additional Lnformation (RAI) Associated with Adoption of the Alternative Source Term (AST) Methodology2011-06-22022 June 2011 Response to Requests for Additional Lnformation (RAI) Associated with Adoption of the Alternative Source Term (AST) Methodology Project stage: Other ML1118226692011-06-29029 June 2011 PINGP - AST Methodology - ME2609 and ME2610 Project stage: Other L-PI-11-068, Response to Requests for Additional Information (RAI) Associated with Adoption of the Alternative Source Term (AST) Methodology2011-07-11011 July 2011 Response to Requests for Additional Information (RAI) Associated with Adoption of the Alternative Source Term (AST) Methodology Project stage: Response to RAI ML1120819672011-07-20020 July 2011 E-mail Prairie Island - Request for Clarification of June 22, 2011 Request for Additional Information (RAI) Response Project stage: RAI L-PI-11-079, Response to Requests for Additional Lnformation (RAI) Associated with Adoption of the Alternative Source Term (AST) Methodology2011-08-0909 August 2011 Response to Requests for Additional Lnformation (RAI) Associated with Adoption of the Alternative Source Term (AST) Methodology Project stage: Other ML1125503562011-09-0101 September 2011 Ngp - Draft RAI Concerning SGTR Instrumentation for Alternative Source Term LAR Project stage: Draft RAI ML1125503572011-09-0101 September 2011 PINGP Draft RAI - AST Instrumentation Project stage: Draft RAI ML1131100842011-11-0202 November 2011 Alternative Source Term Draft Request for Additional Information Project stage: Draft RAI ML1131100942011-11-0202 November 2011 RAI Prairie PINGP, Units 1 and 2 Project stage: RAI L-PI-11-099, Response to Requests for Additional Information Regarding Regulatory Guide 1.97 Instrumentation Associated with Adoption of the Alternative Source Term (AST) Methodology2011-12-0808 December 2011 Response to Requests for Additional Information Regarding Regulatory Guide 1.97 Instrumentation Associated with Adoption of the Alternative Source Term (AST) Methodology Project stage: Response to RAI L-PI-12-010, Response to Requests for Additional Information Associated with Adoption of the Alternative Source Term Methodology2012-02-13013 February 2012 Response to Requests for Additional Information Associated with Adoption of the Alternative Source Term Methodology Project stage: Response to RAI L-PI-12-013, Response to Requests for Additional Information Associated with Adoption of the Alternative Source Term (AST) Methodology2012-02-24024 February 2012 Response to Requests for Additional Information Associated with Adoption of the Alternative Source Term (AST) Methodology Project stage: Response to RAI L-PI-12-082, Response to Requests for Additional Information (RAI) Associated with Adoption of the Alternative Source Term (AST) Methodology2012-09-13013 September 2012 Response to Requests for Additional Information (RAI) Associated with Adoption of the Alternative Source Term (AST) Methodology Project stage: Response to RAI ML1125212892013-01-22022 January 2013 Issuance of Amendments Adoption of Alternative Source Term Methodology Project stage: Approval L-PI-13-111, Notification of Alternative Source Term (AST) Implementation and Unit 2 Steam Generator Replacement2014-01-13013 January 2014 Notification of Alternative Source Term (AST) Implementation and Unit 2 Steam Generator Replacement Project stage: Other 2011-12-08
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Category:Letter type:L
MONTHYEARL-PI-24-036, – Preparation and Scheduling of Operator Licensing Examinations2024-06-28028 June 2024 – Preparation and Scheduling of Operator Licensing Examinations L-PI-24-031, Independent Spent Fuel Storage Installation, Supplement to License Amendment Request to Revise Independent Spent Fuel Storage Installation (ISFSI) License Conditions 23(a), 24(A)(2), and 24(B)(2)2024-06-0505 June 2024 Independent Spent Fuel Storage Installation, Supplement to License Amendment Request to Revise Independent Spent Fuel Storage Installation (ISFSI) License Conditions 23(a), 24(A)(2), and 24(B)(2) L-PI-24-014, License Amendment Request to Revise the Technical Specification Definition of Reactor Trip System (RTS) Response Time and Apply Response Time Testing to RTS Trip Functions with Time Delay Assumption2024-06-0303 June 2024 License Amendment Request to Revise the Technical Specification Definition of Reactor Trip System (RTS) Response Time and Apply Response Time Testing to RTS Trip Functions with Time Delay Assumption L-PI-24-030, Response to Request for Additional Information Regarding License Amendment Request to Revise Technical Specification 3.8.12024-05-22022 May 2024 Response to Request for Additional Information Regarding License Amendment Request to Revise Technical Specification 3.8.1 L-PI-24-012, Independent Spent Fuel Storage Installation - License Amendment Request: Revise Independent Spent Fuel Storage Installation (ISFSI) License Conditions 23(a), 24(A)(2), and 24(B)(2)2024-04-0202 April 2024 Independent Spent Fuel Storage Installation - License Amendment Request: Revise Independent Spent Fuel Storage Installation (ISFSI) License Conditions 23(a), 24(A)(2), and 24(B)(2) L-PI-24-004, Independent Spent Fuel Storage Installation - Annual Effluent Report, January Through December 20232024-02-29029 February 2024 Independent Spent Fuel Storage Installation - Annual Effluent Report, January Through December 2023 L-PI-24-009, Response to Request for Additional Information Prairie Island Nuclear Generating Plant, Unit 2, Alternative RR-09 Safety Injection System and Volume Control System Category C Check Valve Quarterly Testing2024-02-13013 February 2024 Response to Request for Additional Information Prairie Island Nuclear Generating Plant, Unit 2, Alternative RR-09 Safety Injection System and Volume Control System Category C Check Valve Quarterly Testing L-PI-23-034, Response to Request for Additional Information Regarding License Amendment Request to Revise Technical Specification 3.7.8, Cooling Water (Cl) System,2024-01-0202 January 2024 Response to Request for Additional Information Regarding License Amendment Request to Revise Technical Specification 3.7.8, Cooling Water (Cl) System, L-PI-23-035, Response to Request for Additional Information Regarding License Amendment Request to Revise Technical Specifications Section 5.6.6, Reactor Coolant System (RCS) Pressure and Temperature Limits Report2023-12-20020 December 2023 Response to Request for Additional Information Regarding License Amendment Request to Revise Technical Specifications Section 5.6.6, Reactor Coolant System (RCS) Pressure and Temperature Limits Report L-PI-23-033, Supplement to License Amendment Request to Revise Technical Specification 3.8.1, Surveillance Requirement 3.8.1.2, Note 32023-12-0505 December 2023 Supplement to License Amendment Request to Revise Technical Specification 3.8.1, Surveillance Requirement 3.8.1.2, Note 3 L-PI-23-025, License Amendment Request to Revise Technical Specification 3.8.1, Surveillance Requirement 3.8.1.2, Note 32023-09-28028 September 2023 License Amendment Request to Revise Technical Specification 3.8.1, Surveillance Requirement 3.8.1.2, Note 3 L-PI-23-023, Baffle Former Bolts Alternate Aging Management Strategy2023-09-11011 September 2023 Baffle Former Bolts Alternate Aging Management Strategy L-PI-23-018, License Amendment Request to Revise ISFSI Technical Specification 4.4 to Allow Use of a Code Alternative to ASME Code, NB-5130, Examination of Weld Edge Preparation Surfaces, for the TN-40HT2023-07-14014 July 2023 License Amendment Request to Revise ISFSI Technical Specification 4.4 to Allow Use of a Code Alternative to ASME Code, NB-5130, Examination of Weld Edge Preparation Surfaces, for the TN-40HT L-PI-23-006, License Amendment Request to Revise Technical Specification 3.7.8 Required Actions2023-06-22022 June 2023 License Amendment Request to Revise Technical Specification 3.7.8 Required Actions L-PI-23-016, 2022 10 CFR 50.46 LOCA Annual Report2023-06-14014 June 2023 2022 10 CFR 50.46 LOCA Annual Report L-PI-23-010, Annual Report of Individual Monitoring2023-04-27027 April 2023 Annual Report of Individual Monitoring L-PI-23-007, Supplement to Application to Revise Technical Specification Section 5.6.6, Reactor Coolant System (RCS) Pressure and Temperature Limits Report (PTLR)2023-03-28028 March 2023 Supplement to Application to Revise Technical Specification Section 5.6.6, Reactor Coolant System (RCS) Pressure and Temperature Limits Report (PTLR) L-PI-23-005, CFR 50.55a Requests Nos. 1-RR-5-15 and 2-RR-5-15, Proposed Use of Subsequent ASME Code Edition and Addenda in Accordance with 10 CFR 50.55a(g)(4)(iv)2023-03-0303 March 2023 CFR 50.55a Requests Nos. 1-RR-5-15 and 2-RR-5-15, Proposed Use of Subsequent ASME Code Edition and Addenda in Accordance with 10 CFR 50.55a(g)(4)(iv) L-PI-23-001, Day Steam Generator Tube Inspection Report2023-01-30030 January 2023 Day Steam Generator Tube Inspection Report L-PI-22-047, Resubmittal of Prairie Island Nuclear Generating Plant (PINGP) 2018 Unit 1 180-Day Steam Generator Tube Inspection Report2022-12-21021 December 2022 Resubmittal of Prairie Island Nuclear Generating Plant (PINGP) 2018 Unit 1 180-Day Steam Generator Tube Inspection Report L-PI-22-020, Application to Revise Technical Specification Section 5.6.6, Reactor Coolant System (RCS) Pressure and Temperature Limits Report (PTLR)2022-12-0202 December 2022 Application to Revise Technical Specification Section 5.6.6, Reactor Coolant System (RCS) Pressure and Temperature Limits Report (PTLR) L-PI-22-040, Supplement to Application to Revise Technical Specifications to Adopt TSTF-577, Revised Frequencies for Steam Generator Tube Inspections2022-10-0606 October 2022 Supplement to Application to Revise Technical Specifications to Adopt TSTF-577, Revised Frequencies for Steam Generator Tube Inspections L-PI-22-037, Updated Approach for Prairie Island Unit 1 and Unit 2 Baffle Former Bolts2022-09-20020 September 2022 Updated Approach for Prairie Island Unit 1 and Unit 2 Baffle Former Bolts L-PI-22-032, CFR 50.46 LOCA Annual Report2022-06-16016 June 2022 CFR 50.46 LOCA Annual Report L-PI-22-033, Response to Request for Additional Information Prairie Island Nuclear Generating Plant, Units 1 and 2, Amendment to Adopt 24-Month Operating Cycles2022-06-10010 June 2022 Response to Request for Additional Information Prairie Island Nuclear Generating Plant, Units 1 and 2, Amendment to Adopt 24-Month Operating Cycles L-PI-22-003, Application to Revise Technical Specifications to Adopt TSTF-577, Revised Frequencies for Steam Generator Tube Inspections2022-06-0707 June 2022 Application to Revise Technical Specifications to Adopt TSTF-577, Revised Frequencies for Steam Generator Tube Inspections L-PI-22-024, Supplement to Application for License Amendment to Implement 24-Month Operating Cycle2022-03-0707 March 2022 Supplement to Application for License Amendment to Implement 24-Month Operating Cycle L-PI-21-047, Response to Request for Additional Information 24-Month Cycle Amendment Prairie Island Nuclear Generating Plant, Units 1 and 22021-12-0707 December 2021 Response to Request for Additional Information 24-Month Cycle Amendment Prairie Island Nuclear Generating Plant, Units 1 and 2 L-PI-21-045, Response to Request for Additional Information Cooling Water System License Amendment Request2021-11-0404 November 2021 Response to Request for Additional Information Cooling Water System License Amendment Request L-PI-21-029, Exigent License Amendment Request to Revise Technical Specification 3.7.8 to Allow a One-Time Extension of the Completion Time of Required Action B.12021-10-0707 October 2021 Exigent License Amendment Request to Revise Technical Specification 3.7.8 to Allow a One-Time Extension of the Completion Time of Required Action B.1 L-PI-21-006, License Amendment Request to Revise Technical Specification 3.3.1, Reactor Trip System (RTS) Instrumentation, to Incorporate Installed Bypass Test Capability for the Power Range RTS Functions2021-10-0202 October 2021 License Amendment Request to Revise Technical Specification 3.3.1, Reactor Trip System (RTS) Instrumentation, to Incorporate Installed Bypass Test Capability for the Power Range RTS Functions L-PI-21-032, Response to Request for Additional Information Amendment Request to Adopt TSTF-471 and 571-T for Prairie Island2021-09-30030 September 2021 Response to Request for Additional Information Amendment Request to Adopt TSTF-471 and 571-T for Prairie Island L-PI-21-016, Application for License Amendment to Implement 24-Month Operating Cycle2021-08-0606 August 2021 Application for License Amendment to Implement 24-Month Operating Cycle L-PI-21-027, 2020 10 CFR 50.46 LOCA Annual Report2021-06-28028 June 2021 2020 10 CFR 50.46 LOCA Annual Report L-PI-21-023, Independent Spent Fuel Storage Installation - 2020 Annual Radiological Environmental Monitoring Program Report2021-05-14014 May 2021 Independent Spent Fuel Storage Installation - 2020 Annual Radiological Environmental Monitoring Program Report L-PI-21-007, Application to Revise Technical Specifications to Adopt TSTF-471, Eliminate Use of the Term Core Alterations in Actions and Notes2021-04-19019 April 2021 Application to Revise Technical Specifications to Adopt TSTF-471, Eliminate Use of the Term Core Alterations in Actions and Notes L-PI-20-050, Request for a One-Time Exemption from 10 CFR 50, Appendix E, Biennial Emergency Preparedness Exercise Requirements, Due to COVID-19 Pandemic2020-10-0707 October 2020 Request for a One-Time Exemption from 10 CFR 50, Appendix E, Biennial Emergency Preparedness Exercise Requirements, Due to COVID-19 Pandemic L-PI-20-051, Supplement to Application to Revise Technical Specifications to Adopt TSTF-547, Clarification of Rod Position Requirements2020-09-28028 September 2020 Supplement to Application to Revise Technical Specifications to Adopt TSTF-547, Clarification of Rod Position Requirements L-PI-20-026, Response to Request for Additional Information: License Amendment Request to Revise Technical Specifications to Adopt Risk Informed Completion Times TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiativ2020-09-0101 September 2020 Response to Request for Additional Information: License Amendment Request to Revise Technical Specifications to Adopt Risk Informed Completion Times TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4 L-PI-20-035, = Request for Revision to Reactor Vessel Material Surveillance Capsule Removal Schedule2020-07-28028 July 2020 = Request for Revision to Reactor Vessel Material Surveillance Capsule Removal Schedule L-PI-20-023, Independent Spent Fuel Storage Installation, Response to Request for Additional Information: License Amendment Request to Expand the Storage Capacity of the Independent Spent Fuel Storage Installation (ISFSI)2020-06-10010 June 2020 Independent Spent Fuel Storage Installation, Response to Request for Additional Information: License Amendment Request to Expand the Storage Capacity of the Independent Spent Fuel Storage Installation (ISFSI) L-PI-20-014, Supplement to License Amendment Request: Expand the Storage Capacity of the Independent Spent Fuel Storage Installation (ISFSI2020-04-29029 April 2020 Supplement to License Amendment Request: Expand the Storage Capacity of the Independent Spent Fuel Storage Installation (ISFSI L-PI-20-004, License Amendment Request to Revise Technical Specifications (TS) to Remove Note I from Limiting Condition for Operating (LCO) 3.4.12 and LCO 3.4.132020-03-30030 March 2020 License Amendment Request to Revise Technical Specifications (TS) to Remove Note I from Limiting Condition for Operating (LCO) 3.4.12 and LCO 3.4.13 L-PI-20-001, License Amendment Request to Address Issues Identified in Westinghouse Nuclear Safety Advisory Letter NSAL-09-5, Revision 1, and NSAL-15-12020-01-29029 January 2020 License Amendment Request to Address Issues Identified in Westinghouse Nuclear Safety Advisory Letter NSAL-09-5, Revision 1, and NSAL-15-1 L-PI-19-041, Application to Revise Technical Specifications to Adopt TSTF-547, Clarification of Rod Position Requirements2019-12-23023 December 2019 Application to Revise Technical Specifications to Adopt TSTF-547, Clarification of Rod Position Requirements L-PI-19-031, License Amendment Request: Revise Technical Specifications to Adopt Risk Informed Completion Times TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b2019-12-16016 December 2019 License Amendment Request: Revise Technical Specifications to Adopt Risk Informed Completion Times TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b L-PI-19-040, License Amendment Request: Revise Technical Specification 5.5.14 to Permanently Extend Containment Leakage Rate Test Frequency2019-10-0707 October 2019 License Amendment Request: Revise Technical Specification 5.5.14 to Permanently Extend Containment Leakage Rate Test Frequency L-PI-19-038, Submittal of Revised Pressure and Temperature Limits Report2019-09-19019 September 2019 Submittal of Revised Pressure and Temperature Limits Report L-PI-19-037, Response to Request for Additional Information: 10 CFR 50.55a Requests Nos. 1-RR-5-10 and 2-RR-5-10, Proposed Alternative to Reactor Vessel Inservice Inspection (ISI) Intervals2019-09-16016 September 2019 Response to Request for Additional Information: 10 CFR 50.55a Requests Nos. 1-RR-5-10 and 2-RR-5-10, Proposed Alternative to Reactor Vessel Inservice Inspection (ISI) Intervals L-PI-19-025, Request to Approve Site-Specific Probabilistic Risk Assessment (PRA) Model for Flowserve N-Seal Abeyance Seal and Dynamic Testing for the Prairie Island Nuclear Generating Plant (PINGP)2019-08-27027 August 2019 Request to Approve Site-Specific Probabilistic Risk Assessment (PRA) Model for Flowserve N-Seal Abeyance Seal and Dynamic Testing for the Prairie Island Nuclear Generating Plant (PINGP) 2024-06-05
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@ Xcel Energy8 L-PI-12-082 10 CFR 50.90 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Prairie Island Nuclear Generating Plant Units 1 and 2 Dockets 50-282 and 50-306 Renewed License Nos. DPR-42 and DPR-60 Response to Requests for Additional Information (RAI) Associated with Adoption of the Alternative Source Term (AST) Methodoloav (TAC Nos. ME2609 and ME261 0) In a letter to the U.S. Nuclear Regulatory Commission (NRC) dated October 27, 2009 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML093160605), the Northern States Power Company, a Minnesota corporation doing business as Xcel Energy (hereafter "NSPM"), requested an amendment to the Technical Specifications (TS) for Prairie Island Nuclear Generating Plant (PINGP). The proposed amendment requested adoption of the Alternative Source Term (AST) methodology, in addition to TS changes supported by AST design basis accident radiological consequence analyses. In a letter dated February 24, 2012 (ADAMS Accession No. ML12058A069), NSPM notified NRC of a potential ventilation flow path diversion that could challenge an assumption in the radiological release analysis of several plant accidents. Therefore, that letter included a commitment to eliminate the 121 Laundry Fan exhaust path as a potential source of post-accident radioactive release following an accident.
To complete their review of this issue, the NRC staff requested additional information by electronic mail dated August 13, 2012. Enclosure 1 to this letter provides a proposed License Condition that will supersede the related commitment (Commitment No. I) made in the February 24, 2012 letter. Note that the License Condition proposed herein is shown as a markup to Appendix B of the Renewed Operating License as proposed in NSPM letter dated June 22,201 1 (ADAMS Accession No.
MLI 11740145).
That June 22, 201 1 letter had proposed two License Conditions associated with AST license amendment implementation. NSPM will implement the License Condition within the terms stated in the proposed License Condition. The proposed license condition uses terminology different from that in the original commitment, while maintaining the original intent (i.e., preclude the 121 Laundry Fan exhaust leakage path). These changes were made to recognize the gravity of the license condition, while offering the flexibility needed as the project progresses into the 171 7 Wakonade Drive East Welch, Minnesota 55089-9642 Telephone: 651.388.1 121 Document Control Desk Page 2 design phase.
A quality design should not preclude any design or operational approach that best serves the design objective.
Two such approaches are discussed below and may be considered for the design: A purely physical plant modification might involve instruments and controls to automatically isolate the laundry fan and damper for the events that require the isolation. Such a modification could be extensive. Another physical plant modification might involve disconnecting electrical power to the laundry fan and isolating control air to the damper to ensure that the flowpath is normally isolated. This design (with associated procedural controls) would allow for re-energizing the air and damper under administrative controls if radiological conditions required venting the Monitor Tanks to the Auxiliary Building Normal Ventilation Stack. By necessity, the review of these administrative controls would address the potential for leakage through this flowpath for any accident that might occur during the venting operation. Any design or procedural modification would be approved under our 10 CFR 50 Appendix B QA Program and our 10 CFR 50.59 Review Program, and would have to meet the proposed License Condition. NSPM submits this supplement in accordance with the provisions of 10 CFR 50.90. The supplemental information provided in this letter does not impact the conclusions of the Determination of No Significant Hazards Consideration and Environmental Assessment presented in the October 27, 2009 submittal, supplemented by letters dated April 29,2010 (ADAMS Accession No.
ML101200083), May 25,2010 (ADAMS Accession No.
ML101460064), June 23,2010 (ADAMS Accession No.
ML101760017), August 12,201 0 (ADAMS Accession No. ML102300295), December 17,201 0 (ADAMS Accession No. ML103510322), June 22,201 1 (ADAMS Accession No.
MLI 1 1740145), July 11,201 1 (ADAMS Accession No. MLI 11 9301 57), August 9, 201 1 (ADAMS Accession No. MLI 12220098), December 8,201 1 (ADAMS Accession No. MLI 13430091), February 13,201 2 (ADAMS Accession No. ML120460484), and February 24,2012 (ADAMS Accession No. ML12058A069).
In accordance with 10 CFR 50.91, NSPM is notifying the State of Minnesota of this License Amendment Request (LAR) supplement by transmitting a copy of this letter to the designated State Official.
If there are any questions or if additional information is needed, please contact Glenn Adams at (61
- 2) 330-6777.
Document Control Desk Page 3 Summarv of Commitments The license conditions of this letter supersede the following commitment made in NSPM letter dated February 24, 201 2 (ADAMS Accession No. MLI 2058A069):
Commitment
- 1. Implement a plant modification that will either block I declare under penalty of perjury that the foregoing is true and correct.
Due Date Within 90 days after the 121 ~aundry Fan exhaust flow path permanently or will otherwise remove the 121 Laundry Fan exhaust path as a potential source of post-accident radioactive release through the Auxiliary Building Ventilation Exhaust stack. Executed on SEP 1 3 2012 completion of the outage in which the Unit 2 Replacement Steam Generators are installed.
James E. Molden Kite Vice President, Prairie Island Nuclear Generating Plant Northern States Power Company - Minnesota Enclosure (1) cc: Administrator, Region Ill, USNRC Project Manager, Prairie Island, USNRC Resident Inspector, Prairie Island, USNRC State of Minnesota ENCLOSURE 1 Additional License Conditions (Markup) Note: The License Condition proposed herein is shown as a markup to Appendix B of the Renewed Operating License as proposed in NSPM letter dated June 22, 201 1 (ADAMS Accession No.
MLI 1 17401 45). 4 pages follow Unit 1 (B-3) - provided only for completeness (no markup) Unit 1 (B-4) - (markup) Unit 2 (B-3) - provided only for completeness (no markup) Unit 2 (B-4) - (markup)
APPENDIX B ADDITIONAL CONDITIONS FACILITY OPERATING LICENSE NO. DPR-42 Aniendnient Number Additional Conditions 158 The schedule for performing Surveillance Requirements (SRs) that are new or revised In Aniendnient No. 158 shall be as follows: For SRs that are new in this amendment, the first performance is due at tlie end of tlie first sutveillance intewal, which begins on the date of iniplementation of tliis amendment.
For SRs that existed prlor to tlils amendment, wliose intervals of performance are being reduced, the first reduced sirrveillance interval begins irpon completion of the flrst strrvelllance performed after implementation of tliis amendment.
For SRs that existed prior- to tliis amendment that have niodifled acceptance crlleria, tlie flrst performance is due at the end of the surveillance interval that began on tlie date . the surveillance was last pelformed prior to the irnplernentaiion of this amendment.
For SRs that existed prlor to this amendment, whose intervals of performance are being extended, the first extended strrvelllance Interval begins upon conipletion of the last surveillance performed prior to the implementation of thls amendment:
' The licensee is authorized to relooate certain Teclinioal Specification requirements previously included In Appendix A to licensee-controlled docirnients, as described in Table LR, "Less Restrictive Changes - Relocated Details," and Table R, "Relocated Specillcatlons," attached to tlie NRC staff's safety evaluation datecl July 26, 2002, Those requirements shall be relocated to tlie appropriate docunients no later than October 31, 2002. The Alternative Source Term (AST) License Amendments
/ will be impleniented after installation of the Unlt 2 -- Repiacenient Stearn Generators (RSGs). Implenientation Date - October 31, 2002 October 31, 2002 Within 90 days after completion of the outage In which tlie Unlt 2 RSGs are Installed Aniendment No, APPENDIX B ADDITIONAL CONDITIONS FACILITY OPERATING LICENSE NO. DPR-42 Amendment Irnplenientatlon Ntrrnber Additional Conditions Date - NSPM will provide the NRC written notification when Unit 2 Within 30 days RSG installation is complete and AST Llcense Anlendment after completion implementation has commenced, of the otrtage in whlcli the Unit 2 RSGs are installed Implement a physical plant modification or procedure modification that will ensure the 121 Laundry Fan exhaust flow path is not a potential source of post-accident radioactive release through the Auxiliary Building Ventilation Exhaust stack.
after completion of the outage in which the Unit 2 RSGs are installed.
Amendment No.
APPENDIX B ADDITIONAL CONDITIONS FACILITY OPERATING LICENSE NO.
DPR-60' Amendnient Number Additional Condltlons 149 The schedule for pelfornilng Su~velllance Reqi~lrenients (SRs) that are new or revised in Amendment No. 149 shall be as follows: For SRs that are new in this amendment, the first performance is due at the end of the flrst siltveillance interval, wiiicli begins on tlie date of implenientation of this aniendment.
For SRs that existed prior to this aniendn~ent, whose Intetvals of perforniance are belng I-educed, tlie first reduced surveillance interval begins upon completion of the first surveillance performed after iniplenientatlon of thls amendment.
For SRs that existed prior to thls amendment that have modified acceptance criteria, the first performance is due at the end of the s~~rveiliance intetval that began on tlie date the su~velllance was last pelformed prlor to the Implenientation of this amendnient.
For SRs that existed prior to thls amendnient, whose intetvals of perforniance are helng extended, the first extended s~~tvelllance intewal begins upon conipletlon of tiie last suweillance performed prior to tlie Iniplenientation of this aniendment.
149 The licensee is autliorized to relocate cettaln Technical Specification requirements previously included in Appendix A to licensee-controlled documents, as descrlbecl in Table LR, "Less Restrictive Changes - Relocated Details," and Table R, "Relocated Specifications," attached to the NRC staff's safety eval~lation dated July 26, 2002. Those requirements shall be relocated to the appropriate docunients no later than October 31, 2002. The Alternative Source Term License Amendments
/ will be implemented after Installation of tlie Unit 2 -- Replacement Steam Generators (RSGs). Implementation Pate October 3 1, 2002 October 31, 2002 Within 90 days after conipletion of tlie outage In which tiie Unlt 2 RSGs are Installed Amendment No.
APPENDIX B ADDITIONAL CONDITIONS FACILITY OPERATING LICENSE NO. DPR-60 Amendment Imm,lementation Number Additional Condltlons Date NSPM wlll provide the NRC wrltten notlficatlon when Unlt 2 Wlthln 30 days RSG Installation Is complete and AST License Amendment after conipletlon iniplementation has commenced.
of the oirtage In whlch the Unlt 2 RSGs are Installed Implement a physical plant modification or procedure modification that will ensure the 121 Laundry Fan exhaust flow path is not a potential source of post-accident radioactive release through the Auxiliary Building Ventilation Exhaust stack. completion of the outage in which the Unit 2 RSGs are installed.
Amendment No.