Letter Sequence Other |
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TAC:ME1476, Clarify Application of Setpoint Methodology for LSSS Functions (Approved, Closed) |
Administration
- Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance
- Meeting
Results
Other: ML092460553, ML092460595, ML092460596, ML100190073, ML100190074, ML100190075, ML100190076, ML100190077, ML101300006, ML101900448, ML101900449, ML101900450, ML101950497, ML101950498, ML103050187, ML110460160, ML110880302, ML11171A060, ML111920326, ML111950133, ML112031112, ML112081701, ML112160736, ML11221A013, ML112450479, ML112460008, ML112460009, ML113340186, ML120050150, ML120250137, ML12313A203, ML12313A204, ML12313A206, NRC-2010-0117, Final Environmental Assessment and Finding of No Significant Impact - Federal Register Notice - Related to the Proposed License Amendment to Increase the Maximum Reactor Power Level
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MONTHYEARML1001900772004-03-31031 March 2004 GE-NE-0000-0024-6517-R0, Safer/Gestr Loss-of-Coolant Accident Analysis for GE14 Fuel. Project stage: Other ML0916101032009-05-27027 May 2009 License Amendment Request (LAR) Pursuant to 10 CFR 50.90: Extended Power Uprate Project stage: Request ML0918906662009-07-0808 July 2009 E-mail from R. Guzman to J. Dosa Acceptance Review Results of NMP2 Extended Power Uprate Application Project stage: Acceptance Review ML0919402542009-07-15015 July 2009 Acceptance Review of License Amendment Request Extended Power Uprate Project stage: Acceptance Review ML0924605502009-08-28028 August 2009 Response to Acceptance Review Comments License Amendment Request for Extended Power Uprate Project stage: Request ML0924605962009-08-28028 August 2009 Attachment 2 - CDI Report 09-26NP, Revision 0, (Non-Proprietary) Stress Assessment of Nine Mile Point, Unit 2 Steam Dryer at CLTP and EPU Conditions, Part 2 of 2 Project stage: Other ML0924605952009-08-28028 August 2009 Attachment 2 - CDI Report 09-26NP, Revision 0, (Non-Proprietary) Stress Assessment of Nine Mile Point, Unit 2 Steam Dryer at CLTP and EPU Conditions, Part 1 of 2 Project stage: Other ML0924605532009-08-28028 August 2009 Attachment 3 - CDI Report 08-08NP, Revision 2, (Non-Proprietary) Acoustic and Low Frequency Hydrodynamic Loads at CLTP Power Level on Nine Mile Point, Unit 2 Steam Dryer to 250 Hz Project stage: Other ML0924502742009-09-0202 September 2009 Acceptance Review Determination of Amendment Request and Supplemental Information Extended Power Uprate Project stage: Acceptance Review ML1019704202009-09-18018 September 2009 E-mail from R. Guzman to J. Dosa Request for Additional Information - Clarification of Applicability of GEH Methods Project stage: RAI ML0928100032009-10-0808 October 2009 Request for Additional Information Nine Mile Point Unit 2 (NMP2) Extended Power Uprate Application License Amendment Request Project stage: RAI ML0930800012009-11-13013 November 2009 Request for Additional Information Extended Power Uprate Project stage: RAI ML0931900032009-11-18018 November 2009 Request for Additional Information the License Amendment Request for Extended Power Uprate Project stage: RAI ML0934300032009-12-10010 December 2009 Request for Withholding Information from Public Disclosure - Proposed License Amendment for Extended Power Uprate Operation, Supplement Dated August 28, 2009 C.D.I Proprietary Documents - Nine Mile Point Nuclear Station Unit No. 2 Project stage: Withholding Request Acceptance ML0932706132009-12-10010 December 2009 Request for Withholding Information from Public Disclosure - Proposed License Amendment for Extended Power Uprate Operation Dated May 27, 2009 C.D.I Proprietary Documents - Nine Mile Point Nuclear Station Unit No. 2 Project stage: Withholding Request Acceptance ML0934106852009-12-10010 December 2009 Request for Withholding Information from Public Disclosure - Proposed License Amendment for Extended Power Uprate Operation Dated May 27, 2009 GEH Proprietary Documents - Nine Mile Point Nuclear Station Unit No. 2 Project stage: Withholding Request Acceptance ML0935110252009-12-23023 December 2009 Request for Additional Information Extended Power Uprate License Amendment Request Project stage: RAI ML1001900722009-12-23023 December 2009 Response to Request for Additional Information, Regarding License Amendment Request for Extended Power Uprate Operation Project stage: Response to RAI ML1001900732009-12-31031 December 2009 C.D.I. Technical Note No. 09-17NP, Limit Curve Analysis with ACM Rev. 4 for Power Ascension at Nine Mile Point, Unit 2, Revision 0 Project stage: Other ML1001900742009-12-31031 December 2009 C.D.I. Report No. 08-08NP, Acoustic and Low Frequency Hydrodynamic Loads at CLTP Power Level on Nine Mile Point Unit 2 Steam Dryer to 250 Hz, Revision 3 Project stage: Other ML1001900752009-12-31031 December 2009 CDI Report No. 09-26NP, Stress Assessment of Nine Mile Point, Unit 2 Steam Dryer at CLTP and EPU Conditions, Cover to Page 62, Revision 1 Project stage: Other ML1001900762009-12-31031 December 2009 CDI Report No. 09-26NP, Stress Assessment of Nine Mile Point, Unit 2 Steam Dryer at CLTP and EPU Conditions, Page 63 Through 130, Revision 1 Project stage: Other ML1019704362010-01-12012 January 2010 E-mail from R. Guzman to T. Darling Request for Additional Information - Extended Power Uprate LAR Standby Liquid Control System Project stage: RAI ML1019704452010-01-27027 January 2010 E-mail from R. Guzman to T. Darling Request for Additional Information Extended Power Uprate - Clarification for Piping NDE Review Project stage: RAI ML1019704532010-02-0101 February 2010 E-mail from R. Guzman to T. Darling Request for Additional Information Extended Power Uprate LAR - Clarification in Fire Protection Review RAI D1, D3 Project stage: RAI ML1005505992010-02-19019 February 2010 Response to Request for Additional Information Regarding License Amendment Request for Extended Power Uprate Operation Project stage: Response to RAI ML1006301122010-03-10010 March 2010 Request for Additional Information - Extended Power Uprate License Amendment Request Mechanical & Civil Engineering Review Project stage: RAI ML1006902762010-03-10010 March 2010 E-mail from R.Guzman to T.Darling Request for Additional Information - Containment & Ventilation Branch - Extended Power Uprate Project stage: RAI ML1006301082010-03-10010 March 2010 Request for Additional Information Steam Dryer Review of the License Amendment Request for Extended Power Uprate Operation Project stage: RAI ML1005508412010-03-16016 March 2010 Letter Transmitting the Draft Environmental Assessment for Nine Mile Point Nuclear Station Extended Power Uprate for Unit No. 2 Project stage: Draft Other ML1006804292010-04-0202 April 2010 Request for Withholding Information from Public Disclosure - Proposed License Amendment for Extended Power Uprate Operation, Supplement Dated December 23, 2009 GEH Proprietary Documents - Nine Mile Point Nuclear Station Unit No. 2 Project stage: Withholding Request Acceptance ML1006804412010-04-0202 April 2010 Request for Withholding Information from Public Disclosure - Proposed License Amendment for Extended Power Uprate Operation, Supplement December 23,2 009 C.D.I Proprietary Documents - Nine Mile Point Nuclear Station Unit No. 2 Project stage: Withholding Request Acceptance ML1006804482010-04-0202 April 2010 Request for Withholding Information from Public Disclosure - Proposed License Amendment for Extended Power Uprate Operation, Supplement February 19, 2010 GEH Proprietary Documents - Nine Mile Point Nuclear Station Unit No. 2 Project stage: Withholding Request Acceptance ML1008500412010-04-0202 April 2010 Summary of Audit Related to the Review of the Extended Power Uprate License Amendment Request of Nine Mile Point Nuclear Station, Unit No. 2 Project stage: Approval ML1008500512010-04-0202 April 2010 Correction Notice to Draft Environmental Assessment for Nine Mile Point Nuclear Station Proposed Extended Power Uprate Amendment for Unit No. 2 Project stage: Draft Other ML1008501072010-04-0202 April 2010 Letter Transmitting Correction to the Notice for the Draft Environmental Assessment and Finding of No Significant Impact for Nine Mile Point Nuclear Station, Unit No. 2 Project stage: Draft Other ML1013000062010-04-14014 April 2010 Follow-Up Questions - EPU Vessels and Integrity Review Project stage: Other ML1011206582010-04-16016 April 2010 Response to Request for Additional Information Re License Amendment Request for Extended Power Uprate Operation Project stage: Response to RAI ML1013803072010-05-0707 May 2010 Response to Request for Additional Information Regarding Steam Dryer Review of the License Amendment Request for Extended Power Uprate Operation Project stage: Response to RAI ML1013200242010-05-10010 May 2010 E-mail from R. Guzman to T. Darling/J. Dosa Request for Additional Information - LOCA Analysis, Extended Power Uprate Project stage: RAI ML1012504242010-05-11011 May 2010 Request for Additional Information Extended Power Uprate License Amendment Request - Reactor System Review Project stage: RAI ML1016101682010-06-0303 June 2010 Response to Request for Additional Information Regarding the License Amendment Request for Extended Power Uprate Operation- Reactor Systems Review Project stage: Response to RAI ML1015908092010-06-0808 June 2010 Request for Additional Information Extended Power Uprate - Probabilistic Risk Assessment Review Project stage: RAI ML1015906522010-06-10010 June 2010 Review of Extended Power Uprate Application and Revised Review Schedule Project stage: Approval ML1019604812010-06-15015 June 2010 E-mail from R.Guzman to T.Darling Request for Additional Information Follow-up RAI - Reactor Systems/Criticality Analysis Project stage: RAI ML1019004492010-06-30030 June 2010 C.D.I. Report No. 10-10NP, Acoustic and Low Frequency Hydrodynamic Loads at CLTP Power Level on Nine Mile Point Unit 2 Steam Dryer to 250 Hz Using ACM Rev. 4.1, Rev. 1 Project stage: Other ML1019004502010-06-30030 June 2010 Calculation SIA 100632.301, Revision 0, May 2010 Nine Mile Point Unit 2 Main Steam Line Strain Gage Data Reduction. Project stage: Other ML1019004482010-06-30030 June 2010 C.D.I. Report No. 10-09NP, ACM Rev. 4.1: Methodology to Predict Full Scale Steam Dryer Loads from In-Plant Measurements, Rev. 1 (Non-Proprietary) Project stage: Other ML1019004472010-06-30030 June 2010 Response to Request for Additional Information Regarding the License Amendment Request for Extended Power Uprate Operation - Steam Dryer and Probabilistic Risk Assessment Project stage: Response to RAI ML1019504952010-07-0909 July 2010 Response to Request for Additional Information Regarding the License Amendment Request for Extended Power Uprate Operation, Non-Proprietary Version of Continuum Dynamics, Inc. Report 10-11 Project stage: Response to RAI 2010-02-01
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Category:Report
MONTHYEARNMP1L3563, Submittal of Relief Request I5R-12, Revision 0, Concerning the Installation of a Full Structural Weld Overlay on Reactor Pressure Vessel Recirculation Inlet Nozzle N2E Safe End-to-Nozzle Dissimilar Metal Weld (32-WD-208)2023-12-0404 December 2023 Submittal of Relief Request I5R-12, Revision 0, Concerning the Installation of a Full Structural Weld Overlay on Reactor Pressure Vessel Recirculation Inlet Nozzle N2E Safe End-to-Nozzle Dissimilar Metal Weld (32-WD-208) NMP1L3545, Supplemental Information Letter to Adopt TSTF-505, Provide Risk- Informed Extended Completion Times - RITSTF Initiative 4b, Revision 2 and 10 CFR 50.69, Risk-informed Categorization and Treatment of Structures, Systems .2023-08-0404 August 2023 Supplemental Information Letter to Adopt TSTF-505, Provide Risk- Informed Extended Completion Times - RITSTF Initiative 4b, Revision 2 and 10 CFR 50.69, Risk-informed Categorization and Treatment of Structures, Systems . NMP1L3515, Submittal of Emergency Relief Request I5R-11 Concerning the Installation of a Weld Overlay on Reactor Pressure Vessel Recirculation Inlet Nozzle N2E Safe End-to-Nozzle Dissimilar Metal Weld (32-WD-208)2023-03-27027 March 2023 Submittal of Emergency Relief Request I5R-11 Concerning the Installation of a Weld Overlay on Reactor Pressure Vessel Recirculation Inlet Nozzle N2E Safe End-to-Nozzle Dissimilar Metal Weld (32-WD-208) NMP1L3469, Constellation Energy Company, LLC, Request for Use of Honeywell Mururoa V4F1 R Supplied Air Suits2022-06-30030 June 2022 Constellation Energy Company, LLC, Request for Use of Honeywell Mururoa V4F1 R Supplied Air Suits RS-21-001, Revised Proposed Alternative to Utilize Code Cases N-878 and N-880 for Carbon Steel Piping2021-01-0404 January 2021 Revised Proposed Alternative to Utilize Code Cases N-878 and N-880 for Carbon Steel Piping ML20303A1752020-10-23023 October 2020 Proposed Relief Request from Section XI Repair/Replacement Documentation for Bolting Replacement of Pressure Retaining Bolting ML20190A1482020-07-0808 July 2020 FAQ 20-01 NMP Scram Final Approved ML20100F6822020-04-0909 April 2020 Submittal of Analytical Evaluation of Recirculation Discharge Nozzle-to-Safe End Weld Indication ML19228A0232019-08-15015 August 2019 Proposed Alternative to Utilize Code Case N-879 NMP2L2695, Supplement Information and Response to Request for Additional Information by the Office of Nuclear Reactor Regulation to Support Review of an Emergency License Amendment Request for One Time Extension to The.2018-12-0707 December 2018 Supplement Information and Response to Request for Additional Information by the Office of Nuclear Reactor Regulation to Support Review of an Emergency License Amendment Request for One Time Extension to The. NMP1L3229, Report of Full Compliance with Phase 1 and Phase 2 of June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe ...2018-08-20020 August 2018 Report of Full Compliance with Phase 1 and Phase 2 of June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe ... ML18018B2922018-01-18018 January 2018 Appendix a, Justification for Continued Operation, Component Review Summary Sheet ML18018B2912018-01-18018 January 2018 Pipe Crack Task Force Report ML18018A9652018-01-18018 January 2018 Nine Mile Point, Unit 1 - Equipment Qualification Program and Tables I - Equipment Qualification Reports and Table Ii - TMI Action Plan ML18018B0122018-01-18018 January 2018 Semi-Annual Radioactive Effluent Release Report July-December 1999 ML17251A0452017-09-20020 September 2017 - Staff Assessment of Flooding Focused Evaluation (CACs No. MG0087 and MG0088) ML17109A3652017-04-13013 April 2017 Pressure and Temperature Limits Report ML17079A3842017-03-24024 March 2017 Summary of the U.S. Nuclear Regulatory Commission Staff'S Review of the Spring 2016 Steam Generator Tube Inservice Inspections ML17037A6862017-02-0606 February 2017 Table 7.2-1 ML17037A7032017-02-0606 February 2017 Table 7.2-1 (Cont'D) ML17027A0162017-01-27027 January 2017 10 CFR 50.46 Annual Report of the Emergency Core Cooling System Evaluation Model Changes and Errors RS-16-178, High Frequency Supplement to Seismic Hazard Screening Report2016-11-0202 November 2016 High Frequency Supplement to Seismic Hazard Screening Report ML16231A4522016-08-30030 August 2016 Interim Staff Evaluation Relating to Overall Integrated Plan in Response to Phase 2 of Order EA-13-109 (Severe Accident Capable Hardened Events) ML16223A8532016-08-25025 August 2016 Interim Staff Evaluation Relating to Overall Integrated Plan in Response to Phase 2 of Order EA-13-109 (Severe Accident Capable Hardened Vents) RS-16-091, Report of Full Compliance with March 12, 2012 Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051)2016-06-14014 June 2016 Report of Full Compliance with March 12, 2012 Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051) ML16160A0942016-06-0808 June 2016 ASP ANALYSIS- REJECT- Nine Mile Point Unit 1 Automatic Reactor Scram Due to Main Steam Isolation Valve Closure (LER 220-2015-004) ML15153A6602015-06-16016 June 2015 Staff Assessment of Information Provided Pursuant to Title 10 of the Code of Federal Regulations Part 50, Section 50.54(f) Seismic Hazard Reevaluations for Recommendation 2.1 of the Near-Term Task Force Re ML15028A1492015-02-11011 February 2015 Interim Staff Evaluation Relating to Overall Integrated Plan in Response to Order EA-13-109, Severe Accident Capable Hardened Vents RS-14-277, Proposed Alternative to Utilize Code Case N-513-4, Evaluation Criteria for Temporary Acceptance of Flaws in Moderate Energy Class 2 or 3 Piping Section XI, Division 12014-09-24024 September 2014 Proposed Alternative to Utilize Code Case N-513-4, Evaluation Criteria for Temporary Acceptance of Flaws in Moderate Energy Class 2 or 3 Piping Section XI, Division 1 ML15022A6612014-07-31031 July 2014 Stress Re-Evaluation of Nine Mile Point Unit 2 Steam Dryer at 115% CLTP, CDI Report No. 14-08NP, Revision 0, Non-proprietary Version ML14153A4102014-07-24024 July 2014 Staff Assessment of Response to 10 CFR 50.54(f) Information Request - Flood-Causing Mechanism Reevaluation ML14176A9612014-06-24024 June 2014 Submittal of Non-Proprietary BWROG Technical Product, BWROGTP-11-006 - ECCS Containment Walkdown Procedure, Rev 1 (January 2011), as Formally Requested During the Public Meeting Held on April 30, 2014 ML14167A3492014-06-20020 June 2014 Staff Assessment of the Flooding Walkdown Report Supporting Implementation of Near-Term Task Force Recommendation 2.3 Related to the Fukushima Dai-Ichi Nuclear Power Plant Accident (Tac. MF0249 & MF0250) ML15022A6622014-05-31031 May 2014 Acoustic and Low Frequency Hydrodynamic Loads at 115% CLTP Target Power Level on Nine Mile Point Unit 2 Steam Dryer to 250 Hz Using ACM Rev. 4.1R, C.D.I. Report No. 14-09NP, Revision 1, Non-proprietary Version ML15023A0312014-04-30030 April 2014 Computation of Cumulative Usage Factor for the 115% CLTP Power Level at Nine Mile Point Unit 2 with the Inboard RCIC Valve Closed, C.D.I. Technical Note No. 14-04NP, Revision 0, Non-proprietary Version ML14099A1962014-03-31031 March 2014 Constellation Energy Nuclear Group, LLC - Seismic Hazard and Screening Report (CEUS Sites), Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 of the Near-Term Task. ML14064A3242014-02-28028 February 2014 000N2495-R1-NP, Rev. 0, Nine Mile Point Nuclear Station Unit 2 Comparison of Mellla+ Reference Design to Cycle 15 Design Characteristics. ML14071A4782014-02-21021 February 2014 Response to Nrc'S Request for Cashflow Statements Regarding Application for Order Approving Transfer of Operating Authority and Conforming License Amendments ML14351A4272014-01-31031 January 2014 000N2528-SRLR, Revision 1, Supplemental Reload Licensing Report for Nine Mile Point 2 Reload 14 Cycle 15 Extended Power Uprate (3988 Mwt) / MELLLA (99-105% Flow). ML14064A3222014-01-31031 January 2014 00N0123-SRLR, Rev. 2, Supplemental Reload Licensing Report for Nine Mile Point 2 (NMP2) Reload 14 Cycle 15 Extended Power Uprate (Epu)/Maximum Extended Load Line Limit Plus (Mellla+). ML14024A4422014-01-0707 January 2014 Submittal of Report in Accordance with 10 CFR 26.719(c)(1) Regarding Unsatisfactory Blind Performance Sample Testing ML14064A3232013-12-31031 December 2013 000N0123-FBIR-NP, Rev. 0, Fuel Bundle Information Report for Nine Mile Point 2 Reload 14 Cycle 15. ML13225A5842013-12-19019 December 2013 Interim Staff Evaluation Relating to Overall Integrated Plan in Response to Order EA-12-049 (Mitigation Strategies) ML13338A6642013-12-11011 December 2013 Mega-Tech Services, LLC Technical Evaluation Report Regarding the Overall Integrated Plan for Nine Mile Point, Unit 2, TAC No.: MF1130 ML13338A6632013-12-11011 December 2013 Mega-Tech Services, LLC, Technical Evaluation Report Regarding the Overall Integrated Plan for Nine Mile Point, Unit 1, TAC No.: MF1129 ML13311A0542013-11-0404 November 2013 Pressure and Temperature Limits Report (PTLR) PTLR-2, Revision 0 (Draft B) ML13316B1102013-11-0101 November 2013 Attachment 9 - Global Nuclear Fuel Report GNF-0000-0156-7490-RO-NP, Gnf Additional Information Regarding the Requested Change to the Technical Specification SLMCPR, Dated August 26, 2013 (Non-proprietary) ML13311A0552013-09-30030 September 2013 Fluence Extrapolation in Support of NMP2 P-T Cure Update, MPM-913991, September 30, 2013, Attachment 3 ML13197A2222013-07-12012 July 2013 Supplemental Response to 10 CFR 50.54(f) Request for Information, Recommendation 2.3, Seismic ML13066A1712013-02-28028 February 2013 R.E. Gina, Overall Integrated Plan for Mitigation Strategies for Beyond-Design-Basis External Events 2023-08-04
[Table view] Category:Technical
MONTHYEARNMP1L3545, Supplemental Information Letter to Adopt TSTF-505, Provide Risk- Informed Extended Completion Times - RITSTF Initiative 4b, Revision 2 and 10 CFR 50.69, Risk-informed Categorization and Treatment of Structures, Systems .2023-08-0404 August 2023 Supplemental Information Letter to Adopt TSTF-505, Provide Risk- Informed Extended Completion Times - RITSTF Initiative 4b, Revision 2 and 10 CFR 50.69, Risk-informed Categorization and Treatment of Structures, Systems . NMP1L3469, Constellation Energy Company, LLC, Request for Use of Honeywell Mururoa V4F1 R Supplied Air Suits2022-06-30030 June 2022 Constellation Energy Company, LLC, Request for Use of Honeywell Mururoa V4F1 R Supplied Air Suits RS-21-001, Revised Proposed Alternative to Utilize Code Cases N-878 and N-880 for Carbon Steel Piping2021-01-0404 January 2021 Revised Proposed Alternative to Utilize Code Cases N-878 and N-880 for Carbon Steel Piping ML20100F6822020-04-0909 April 2020 Submittal of Analytical Evaluation of Recirculation Discharge Nozzle-to-Safe End Weld Indication ML19228A0232019-08-15015 August 2019 Proposed Alternative to Utilize Code Case N-879 NMP2L2695, Supplement Information and Response to Request for Additional Information by the Office of Nuclear Reactor Regulation to Support Review of an Emergency License Amendment Request for One Time Extension to The.2018-12-0707 December 2018 Supplement Information and Response to Request for Additional Information by the Office of Nuclear Reactor Regulation to Support Review of an Emergency License Amendment Request for One Time Extension to The. NMP1L3229, Report of Full Compliance with Phase 1 and Phase 2 of June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe ...2018-08-20020 August 2018 Report of Full Compliance with Phase 1 and Phase 2 of June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe ... ML18018B0122018-01-18018 January 2018 Semi-Annual Radioactive Effluent Release Report July-December 1999 ML18018A9652018-01-18018 January 2018 Nine Mile Point, Unit 1 - Equipment Qualification Program and Tables I - Equipment Qualification Reports and Table Ii - TMI Action Plan ML17109A3652017-04-13013 April 2017 Pressure and Temperature Limits Report ML17037A7032017-02-0606 February 2017 Table 7.2-1 (Cont'D) ML17037A6862017-02-0606 February 2017 Table 7.2-1 RS-14-277, Proposed Alternative to Utilize Code Case N-513-4, Evaluation Criteria for Temporary Acceptance of Flaws in Moderate Energy Class 2 or 3 Piping Section XI, Division 12014-09-24024 September 2014 Proposed Alternative to Utilize Code Case N-513-4, Evaluation Criteria for Temporary Acceptance of Flaws in Moderate Energy Class 2 or 3 Piping Section XI, Division 1 ML15022A6612014-07-31031 July 2014 Stress Re-Evaluation of Nine Mile Point Unit 2 Steam Dryer at 115% CLTP, CDI Report No. 14-08NP, Revision 0, Non-proprietary Version ML14176A9612014-06-24024 June 2014 Submittal of Non-Proprietary BWROG Technical Product, BWROGTP-11-006 - ECCS Containment Walkdown Procedure, Rev 1 (January 2011), as Formally Requested During the Public Meeting Held on April 30, 2014 ML15022A6622014-05-31031 May 2014 Acoustic and Low Frequency Hydrodynamic Loads at 115% CLTP Target Power Level on Nine Mile Point Unit 2 Steam Dryer to 250 Hz Using ACM Rev. 4.1R, C.D.I. Report No. 14-09NP, Revision 1, Non-proprietary Version ML15023A0312014-04-30030 April 2014 Computation of Cumulative Usage Factor for the 115% CLTP Power Level at Nine Mile Point Unit 2 with the Inboard RCIC Valve Closed, C.D.I. Technical Note No. 14-04NP, Revision 0, Non-proprietary Version ML14064A3242014-02-28028 February 2014 000N2495-R1-NP, Rev. 0, Nine Mile Point Nuclear Station Unit 2 Comparison of Mellla+ Reference Design to Cycle 15 Design Characteristics. ML14071A4782014-02-21021 February 2014 Response to Nrc'S Request for Cashflow Statements Regarding Application for Order Approving Transfer of Operating Authority and Conforming License Amendments ML14064A3222014-01-31031 January 2014 00N0123-SRLR, Rev. 2, Supplemental Reload Licensing Report for Nine Mile Point 2 (NMP2) Reload 14 Cycle 15 Extended Power Uprate (Epu)/Maximum Extended Load Line Limit Plus (Mellla+). ML14351A4272014-01-31031 January 2014 000N2528-SRLR, Revision 1, Supplemental Reload Licensing Report for Nine Mile Point 2 Reload 14 Cycle 15 Extended Power Uprate (3988 Mwt) / MELLLA (99-105% Flow). ML14064A3232013-12-31031 December 2013 000N0123-FBIR-NP, Rev. 0, Fuel Bundle Information Report for Nine Mile Point 2 Reload 14 Cycle 15. ML13225A5842013-12-19019 December 2013 Interim Staff Evaluation Relating to Overall Integrated Plan in Response to Order EA-12-049 (Mitigation Strategies) ML13338A6632013-12-11011 December 2013 Mega-Tech Services, LLC, Technical Evaluation Report Regarding the Overall Integrated Plan for Nine Mile Point, Unit 1, TAC No.: MF1129 ML13338A6642013-12-11011 December 2013 Mega-Tech Services, LLC Technical Evaluation Report Regarding the Overall Integrated Plan for Nine Mile Point, Unit 2, TAC No.: MF1130 ML13311A0542013-11-0404 November 2013 Pressure and Temperature Limits Report (PTLR) PTLR-2, Revision 0 (Draft B) ML13316B1102013-11-0101 November 2013 Attachment 9 - Global Nuclear Fuel Report GNF-0000-0156-7490-RO-NP, Gnf Additional Information Regarding the Requested Change to the Technical Specification SLMCPR, Dated August 26, 2013 (Non-proprietary) ML13311A0552013-09-30030 September 2013 Fluence Extrapolation in Support of NMP2 P-T Cure Update, MPM-913991, September 30, 2013, Attachment 3 ML13197A2222013-07-12012 July 2013 Supplemental Response to 10 CFR 50.54(f) Request for Information, Recommendation 2.3, Seismic ML13078A3232013-02-28028 February 2013 XGEN-2012-25-NP, Revision 1, Westinghouse Engineering Report, Technical Basis for the Inspection Frequency of the Modified Alloy 718 Jet Pump Beam, Attachment 2 ML13066A1692013-02-28028 February 2013 Units I and 2, Overall Integrated Plan for Reliable Hardened Vents ML12313A2032012-10-26026 October 2012 Attachment 1, NMP2 Extended Power Uprate, Power Ascension Test Report ML12313A2042012-10-26026 October 2012 Attachment 2, Final Steam Dryer Stress Report, Continuum Dynamics, Incorporated Report No. 12-18NP, Attachment 3, Affidavit from CDI ML12277A0902012-10-12012 October 2012 Technical Letter Report on Aging Management Program Audits at Ginna and Nine Mile Point 1 ML12284A1842012-09-30030 September 2012 Attachment 3, Final EPU Steam Dryer Load Definition CDI Report No. 12-20NP, Acoustic and Low Frequency Hydrodynamic Loads at 115% CLTP Target Power Level on Nine Mile Point, Unit 2 Steam Dryer to 250 Hz Using ACM Rev. 4.1 ML12284A1852012-06-30030 June 2012 Attachment 4, Steam Dryer Limit Curves CDI Technical Note No. 12-13NP, Limit Curves with ACM Rev. 4.1 for the 100% Power Level Basis at Nine Mile Point, Unit 2, Revision 1 ML12170A8692012-06-30030 June 2012 Transition to 10 CFR 50.48(c) - NFPA 805, Performance-Based Standard for Fire Protection for Light Water Reactor Electric Generating Plants, 2001 Edition ML11221A0132011-08-0505 August 2011 Attachment 3, Continuum Dynamics, Inc Technical Note No. 11-17NP, Limit Curve Analysis with ACM Rev. 4.1 for Power Ascension at Nine Mile Point Unit 2, Revision 1. (Non-Proprietary) ML11208B7732011-07-0808 July 2011 Report No. 1100539.401, Rev. 1, Nine Mile Point Unit 1, Steam Dryer Support Bracket Flaw Evaluation. ML11188A1952011-06-28028 June 2011 Calculation S0VESSELM035 (SIA File No. 1100566.301), Reactor Pressure Vessel Head Weld Flaw Evaluation, Rev. 00.00 ML11171A0602011-05-31031 May 2011 Attachment 3, CDI Report No. 11-04NP, Stress Evaluation of Nine Mile Point Unit 2 Steam Dryer Using ACM Rev. 4.1 Acoustic Loads, Revision 0. (Non-Proprietary), Attachment 4, Affidavit from Continuum Dynamics, Inc ML1108803022011-03-31031 March 2011 NEDO-33636, Fuel Storage Criticality Safety Analysis of New Fuel Storage Racks - GE14, Attachment 3, (Non-Proprietary) ML1104601602011-01-31031 January 2011 Attachment 1, CDI Report No. 10-09NP, ACM Rev. 4.1: Methodology to Predict Full Scale Steam Dryer Loads from In-Plant Measurements, Revision 3 ML12135A6232011-01-14014 January 2011 Off-Site Dose Calculation Manual (Odcm), Revision 32 ML1035003652010-12-13013 December 2010 Holtec Report No. HI-2012621 (Non-Proprietary), Criticality Safety Evaluation for the Nine Mile Point 2 Rack Installation Project ML1021702952010-07-30030 July 2010 Attachment 5, Continuum Dynamics, Inc., CDI Report No. 10-12NP, Design and Stress Evaluation of Nine Mile Point Unit 2 Steam Dryer Modifications for EPU Operation ML1021701862010-07-28028 July 2010 Attachment 4, Structural Integrity Associates, Inc., Flaw Evaluation of Indications in the Nine Mile Point Unit 2 Steam Dryer Vertical Support Plates Considering Extended Power Uprate Flow Induced Vibration Loading ML1019004492010-06-30030 June 2010 C.D.I. Report No. 10-10NP, Acoustic and Low Frequency Hydrodynamic Loads at CLTP Power Level on Nine Mile Point Unit 2 Steam Dryer to 250 Hz Using ACM Rev. 4.1, Rev. 1 ML1021701852010-06-30030 June 2010 Attachment 3, Global Nuclear Fuel - Americas, LLC, MCNP01A, Low Enriched UO2 Pin Lattice in Water Critical Benchmark Evaluations Using ENDF/B-V Nuclear Cross-Section Data, Revision 1 ML1019004482010-06-30030 June 2010 C.D.I. Report No. 10-09NP, ACM Rev. 4.1: Methodology to Predict Full Scale Steam Dryer Loads from In-Plant Measurements, Rev. 1 (Non-Proprietary) 2023-08-04
[Table view] |
Text
ATTACHMENT 3 CDI REPORT 08-08NP (NON-PROPRIETARY)
ACOUSTIC AND LOW FREQUENCY HYDRODYNAMIC LOADS AT CLTP POWER LEVEL ON NINE MILE POINT UNIT 2 STEAM DRYER TO 250 HZ, REV. 2 Nine Mile Point Nuclear Station, LLC August 28, 2009
This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information C.D.I. Report No. 08-08NP Acoustic and Low Frequency Hydrodynamic Loads at CLTP Power Level on Nine Mile Point Unit 2 Steam Dryer to 250 Hz Revision 2 Prepared by Continuum Dynamics, Inc.
34 Lexington Avenue Ewing, NJ 08618 Prepared under Purchase Order No. 7708631 for Constellation Energy Group Nine Mile Point Nuclear Station, LLC P. 0. Box 63 Lycoming, NY 13093 Approved by Wo1z'411 Alan J. Bilanin Prepared by Milton E. Teske August 2009
This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Executive Summary Measured strain gage time-history data in the four main steam lines at Nine Mile Point Unit 2 were processed by a dynamic model of the steam delivery system to predict loads on the full-scale steam dryer. These measured data were first converted to pressures, then positioned on the four main steam lines and used to extract acoustic sources in the system. A validated acoustic circuit methodology was used to predict the fluctuating pressures anticipated across components of the steam dryer in the reactor vessel. The acoustic circuit methodology included a low frequency hydrodynamic contribution, in 'addition to an acoustic contribution at all frequencies. This pressure loading was then provided for structural analysis to assess the structural adequacy of the steam dryer in Nine Mile Point Unit 2.
This effort provides the Constellation Energy Group with a dryer dynamic load definition that comes directly from measured Nine Mile Point Unit 2 full-scale data and the application of a validated acoustic circuit methodology, at a power level where data were acquired.
This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table of Contents Section Page Executive Summary ..................................... i Table of C ontents ............ ............................................ .. ........ ii
- 1. Introduction ..................................... ....... 1
- 2. Modeling Considerations ................................... 2 2.1 Helmholtz Analysis ............................................................ 2 2.2 Acoustic Circuit Analysis ..................................................... 3 2.3 Low Frequency Contribution ............................................... 4
- 3. Input Pressure Data .................................................................... 5
- 4. Results ............................................... 11
- 5. Uncertainty Analysis ............................................................... 19
- 6. C onclusions ........................................................................... 21
- 7. R eferences ............................................................................. 22 A ppendix ........................................................................... 24 ii
This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
- 1. Introduction In Spring 2005 Exelon installed new stream dryers into Quad Cities Unit 2 (QC2) and Quad Cities Unit 1. This replacement design, developed by General Electric, sought to improve dryer performance and overcome structural inadequacies identified on the original dryers, which had been in place for the last 30 years. As a means for confirming the adequacy of the steam dryer, the QC2 replacement dryer was instrumented with pressure sensors at 27 locations. These pressures formed the set of data used to validate the predictions of an acoustic circuit methodology under development by Continuum Dynamics, Inc. (C.D.I.) for several years [1].
One of the results of this benchmark exercise [2] confirmed the predictive ability of the acoustic circuit methodology for pressure loading across the dryer, with the inclusion of a low frequency hydrodynamic load. This methodology, validated against the Exelon full;-scale data and identified as the Modified Bounding Pressure model, is used in the effort discussed herein.
This report applies this validated methodology to the Nine Mile Point Unit 2 (NMP2) steam dryer and main steam line geometry. Strain gage data obtained from the four main steam lines were used to predict pressure levels on the NMP2 full-scale dryer at Current Licensed Thermal Power (CLTP). These data were then used -to predict dryer stresses, and to determine the minimum stress margin on the dryer. This result will then be used to develop limit curves, a sample of which is shown in the Appendix.
This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
- 2. Modeling Considerations The acoustic circuit analysis of the NMP2 steam supply system is broken into: two distinct analyses: a Helmholtz solution within the steam dome and an acoustic circuit analysis in the main steam lines. This section of the report highlights the two approaches taken here. These analyses are then coupled for an integrated solution.
2.1 Helmholtz Analysis A cross-section of the steam dome (and steam dryer) is shown below in Figure 2.1, with NMP2 dimensions as shown [3]. The complex three-dimensional geometry is rendered onto a uniformly-spaced rectangular grid (with mesh spacing of approximately 1.5 inches to accommodate frequency from 0 to 250 Hz in full scale), and a solution, over the frequency range of interest, is obtained for the Helmholtz equation alp alp alp (,2 2 2 ~ =0 a2 2p 4apW t*
R a' b a b a bp I*. = ===: L J
e f I g Steam-Water Interface '
Figure 2.1. Cross-sectional description of the steam dome and dryer at NMP2, with the dimensions of a = 18.25 in, a' = 15.25 in, b = 13.27 in, b' = 13.65 in, c = 15.75 in, c' = 24.0 in, d = 15.75 in, e = 16.25 in, f = 71.5 in, g= 160.625 in, i = 84.5 in, j=
181.5 in, k= 118.75 in, andR= 124.75 in.
2
This Document Does Not Contain Continuum Dynamics, Inc.. Proprietary Information where P is the pressure at a grid point, (ois frequency, and a is acoustic speed in steam.
This equation is solved for incremental frequencies from 0 to 250 Hz (full scale), subject to the boundary conditions.
dP
-0 dn normal to all solid surfaces (the steam dome wall and interior and exterior surfaces of the drye'r),
dP9 ico dn a normal to the nominal water level surface, and unit pressure applied to one inlet to a main steam line and zero applied to the other three.
2.2 Acoustic Circuit Analysis The Helmholtz solution within the steam dome is coupled to an acoustic circuit solution in the main steam lines. Pulsation in a single-phase compressible medium, where acoustic wavelengths are long compared to transverse dimensions (directions perpendicular to the primary flow directions), lend themselves to application of the acoustic circuit methodology. If the analysis is restricted to frequencies below 250 Hz, acoustic wavelengths are approximately 8 feet in length and wavelengths are therefore long compared to most components of interest, such as branch junctions.
Acoustic circuit analysis divides the main ;steam lines into elements which are each characterized, as sketched in Figure 2.2, by a length L, a-cross-sectional area A, a fluid mean density p, a fluid mean flow velocity U, and a fluid mean acoustic speed a.
- A - element cross-sectional area a.-
U, ý, 3 0 I~ L1 Xn Figure 2.2. Schematic of an element in the acoustic circuit analysis,:with length L and cross-sectional area A.
3
This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Application of acoustic circuit methodology generates solutions for the fluctuating pressure Pn and velocity u, in the nth element of the form Pn =[Aneiklnxn + B eik2nXn ýicot U[(O-flk neiknXn +. kn2 Bne ik2nXn leit where harmonic time dependence of the form ei°t has been assumed. The wave numbers k1 n and k2n are the two complex roots of the equation kn U2 n.+nn) C+,kY=
Dna a where f, is the pipe friction factor for element n, Dn is the hydrodynamic diameter for element n, and i = V-"I. An and Bn are complex constants which are a function of frequency and are determined by satisfying continuity of pressure and mass conservation at element junctions.
The solution for pressure and velocity in the main steam lines is coupled to the Helmholtz solution in the steam dome, to predict the pressure loading on the steam dryer.
The main steam line piping geometry is summarized in Table 2.1.
Table 2.1. Main steam line lengths at NMP2, measured from the inside wall of the steam dome down the centerline of the main steam lines. Main steam line diameter is 26 inch Schedule 80 (ID = 23.50 in).
Main Steam Line Length to First Length to Second Strain Gage Strain Gage Measurement (ft) Measurement (ft)
A 13.6 26.2 B 14.5 19.9 C 22.1 27.5 D 20.4 25.8 2.3 Low Frequency Contribution
((
(3)))
4
This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
- 3. Input Pressure Data Strain gages were mounted on the four main steam lines of NMP2. Two data sets were examined in this analysis. The first data set recorded the strain at Current Licensed Thermal Power (100% power level or CLTP), and the second data set recorded the strain at near-zero voltage on the strain gages (EIC noise at CLTP). The data were provided in the following files:
Data File Name Power Level Voltage 20080419094734 100% 10.0 V 20080419094134 100% 0.01 V (EIC)
The strain gage signals were converted to pressures by the use of the conversion factors provided in [4] and summarized in Table 3.1. Exclusion' frequencies were used to remove extraneous signals, as also identified in [4] and [5], and summarized in Table 3.2. The electrical noise was removed by applying the function PS(o) =p . (Co)[1 - N( )
- ~PSN(Co) where Ps(o) is the CLTP signal PsN((o) corrected for electrical noise PN(co), computed as a function of frequency co, and IPN(O)/PsN(cO)) can be no larger than 1.0. These signals were further processed by the coherence factor and mean filtering as described in [2]. Coherence is shown in Figure 3.1.
The resulting main steam line pressure signals may be represented in two ways, by their minimum and maximum pressure levels, and by their PSDs. Table 3.3 provides the pressure level information, while Figure 3.2 compares the CLTP frequency content at the eight measurement locations.
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This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table 3.1. Conversion factors from strain to pressure [4]. Channels are averaged to give the average strain; blank sensors indicate that the sensor was inoperative.
Strain to Pressure Channel Channel Channel Channel (psid/itstrain) Number Number Number Number MSL A Upper 3.82 1 2 3 MSL A Lower 3.84 5 6 7 8 MSL B Upper 3.84 9 10 11 12 MSL B Lower 3.81 13 14 15 16 MSL C Upper 3.85 17 18 19 20 MSL C Lower 3.81 21 22 23 24 MSL D Upper 3.92 15 26 27 MSL D Lower 3.94 29 30 31 32 Table 3.2. Exclusion frequencies for NMP2 strain gage data, as suggested in [4] and [5].
Frequency Range (Hz) Exclusion Cause 0.0-2.0 Mean 58.85 - 60.15 Line Noise 119.9 - 120.1 Line Noise 179.6 - 180.4 Line Noise 239.8 -240.2 Line Noise 148.85 - 149.15 Recirculation Vane Passing Frequency: 100%
87.9 - 88.1 Extraneous Non Identified Source 112.8 - 113.2 Extraneous Non Identified Source 134.1 - 134.9 Extraneous Non Identified Source 27.9 -28.1; 33.5 - 34.5 MSL A Pipe Vibrations 68.9-71.1; 79.9- 81.1 MSL B Pipe Vibrations 12.7 - 13.4 MSL C Pipe Vibrations 39.6 - 40.4; 91.2 - 91.6 MSL D Pipe Vibrations Table 3.3. Main steam line (MSL) pressure levels in NMP2 at CLTP conditions.
Minimum Maximum RMS Pressure. (psid) Pressure (psid) Pressure (psid)
MSL A Upper -1.55 1.59 0.35 MSL A Lower -1.88 2.07 0.46 MSL B Upper -1.63 1.47 0.37 MSL B Lower -1.54 1.34 0.32 MSL C Upper -2.09 1.99 0.51 MSL C Lower -1.74 1.76 0.43 MSL D Upper -1.86 1.72 0.40 MSL D Lower -1.76 1.63 0.40 6
This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information' NMP2: MSL A 0.8 a.)
0 0.6 a.)
a.)
0 0.4 0.2 0
0 50 100 150 200 250 Frequency (Hz)
NMP2: MSL B 1 -- - - -
0.8 0.6 C.)
0.4 . .. . . .. . .~ . . *. . . . . . .. ~. --
U 0.2 0
0 50 100 150 200 250 Frequency (Hz)
Figure 3.1 a. Coherence between the upper and lower strain gage readings at .NMP2: main steam line A (top); main steam line B (bottom).
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This. Document Does Not. Contain Continuum Dynamics, Inc; Proprietary Information NMP2: MSL C
.L................. - -- - - . ............
. -- . . . .. L..... ..
0 4 - - -- ---
0 "
0.6 0.
' 0 50 100 150 200 250 Frequency (Hz)
NMP2: MSL D IIT I I I I I I I I i I I I I I S 0 .8 -..-----......----..----------------.... I..---------..----.. I...........-----------:
S0.6 0.4 0.28 --------....-------. ----........ ...... -- ..-----------
0 050 ... _100. 150 200 250 Frequency (Hz)
Figure 3.lb. Coherence between the Upper and lower strain gage readifigs at NMP2: main steam line C (top); main steam line D (bottom).
8-
This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information NMP2: MSL A 0.1 0.01 0.001 0.0001 10-5 10-6 0 50 100 150 200 250 Frequency (Hz)
NMP2" MSL B 0.1 0.01 0.001 0.0001 105 10-6 0 50 100 150 200 250 Frequency (Hz)
Figure 3.2a. PSD comparison of pressure measurements at strain gage locations on main steam line A (top) and B (bottom).
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This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information NMP2: MSL1 C 0.1 ii i 0.01 - -..........
- ........-- .... U pper -------
Lower 0.001 0.0001 10-5
. . I . . . I . . . I . . . . .
10-6 I I I i I I I 0 i 50 100 I 150 200 250 Frequency (Hz)
NMP2: MSL D 0.1 0.01 0.001 0
.0001 10-5 10"6 0 50 100 150 200 250 Frequency (Hz)
Figure 3.2b. PSD comparison of pressure measurements at strain gage locations on main steam line C (top) and D (bottom).
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This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
- 4. Results The measured main steam line pressure data were used to drive the validated acoustic circuit methodology for the NMP2 steam dome coupled to the main steam lines to make a pressure load prediction on the NMP2 dryer. A low resolution load, developed at the nodal locations identified in Figures 4.1 to 4.4, produces the maximum differential pressure RMS pressure levels across the dryer as shown in Figure 4.5. PSDs of the peak loads on either side of the dryer are shown in Figure 4.6, while PSDs of the closure plate loads are shown in Figure 4.7.
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This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information 42 0 5 66-7 84 95 14 100 8
3 7 13 23 31 41 58 65 76 83 94 99 105
'11 6
98 22 93 82
._40 755 I-,
I I_ 1 571 64 Figure 4.1. Cover and base plate low resolution load pressure node locations on the NMP2 dryer, with pressures acting downward in the notation defined here. Main steam line A is off the upper right corner of the figure; main steam line B off the lower right corner of the figure; main steam line C off the lower left corner of the figure; and main steam line D off the upper left corner of the figure. The cover plate on the A/B side of the dryer is identified by the nodes 98-99-100-105; the cover plate on the C/D side of the dryer is identified by the nodes 3-8-7-6. Base plates are identified by the nodes 64-65-66-77-76-75 and 82-83-84-95-94-93 (A/B side), 48-49-50-59-58-57 (center), and 12-13-14-24-23-22 and 30-31-32-42-41-40 (C/D side). The high resolution grid mesh (for subsequent finite element analysis) is spaced 3 inches on the cover plates, 6 inches on the first base plates, and 12 inches on the rest of the base plates.
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This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Figure 4.2. Top plate low resolution load pressure node locations on the NMP2 dryer, with pressures acting downward in the notation defined here. Main steam line A is off the upper right comer of the figure; main steam line B off the lower right comer of the figure; main steam line C off the lower left comer of the figure; and main steam line D off the upper left comer of the figure. Top plates on the A/B side of the dryer are identified by the nodes 90-91-92-103-102-101, 72-73-74-89-88-87, and 54-55 71-70-69. Top plates on the C/D side of the dryer are identified by the nodes 9 11-17-16-15, 27-28-29-35-34-33, and 45-46-47-53-52-51. The high resolution grid mesh (for subsequent finite element analysis) is spaced 3 inches on the outer top plates, 6 inches on the first inner top plates, and 12 inches on the rest of the inner top plates.
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This Document Does NotContain Continuum Dynamics, Inc. Proprietary Information Figure 4.3. Outer and inner hood low resolution load pressure nodes on the NMP2 dryer. Main steam lines A and B are off the upper right comer of the figure; main steam lines C and D are off the lower left comer of the figure. Pressures act lower left to upper right on the outer hood identified by the nodes 6-7-8-11-10-9 (opposite C/D) and on the inner hoods identified by the nodes 22-23-24-29-28-27 and 40-41-42-47-46-45.
Pressures act upper right to lower left on the outer hood identified by the nodes 98-99-100-103-102-101 (opposite A/B) and on, the inner hoods identified by the nodes 82-83-84-89-88-87 and 64-65-66-71-70-69. The high resolution grid mesh (for subsequent finite element analysis) is spaced 3 inches on the outer hoods, 6 inches on the first inner hoods, and 12 inches on the inside hoods.
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This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information;.,
2 Figure 4.4. 'Skirt and end plate low resolution load pressure nodes on the NMP2 dryer, with pressures'acting from the outside of the dryer to the inside. Main steam lines A and
!B are off the right side of the, figure; main. steam lines C and D are-off the left side of the figure. *Skirt nodes are 2-4-18-36-60-78-96-104 and 2-5-19-37-61-79-97-104.
End plate nodes are 20-25 and 21-26, 38-43 and 39-44, 62-67 and 63-68, and 80-85 and 81-86. The high-resolution grid mesh (for subsequent finite element analysis) is spaced 3 inches on the outer portion of the skirt and end plates closest to the main steam lines, 6 inches on the sections nearer the center of the dryer, and 12 inches on the center of the dryer.
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This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)))
Figure 4.5. Predicted loads on the low resolution grid identified in Figures 4.1 to 4.4, as developed by the Modified Bounding Pressure model, to 250 Hz. Low-numbered nodes are on the C-D side of the dryer, while high-numbered nodes are on the A-B side of the dryer.
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This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
((I (3)))
Figure 4.6. PSD of the maximum pressure loads predicted on the C/D side of the NMP2 dryer (top) and the A/B side (bottom).
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This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)))
Figure 4.7. PSD of the closure plate pressure loads predicted on the C/D side of the NMP2 dryer (top) and the A/B side (bottom).
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This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
- 5. Uncertainty Analysis The analysis of potential uncertainty occurring at NMP2 consists of several contributions, including the uncertainty from collecting data on the main steam lines at locations other than the locations on Quad Cities Unit 2 (QC2) and the uncertainty in the Modified Bounding Pressure model. QC2 dryer data at Original Licensed Thermal Power (OLTP) conditions were used to generate an uncertainty analysis of the Acoustic Circuit Methodology (ACM) [2] for NMP2.
The approach taken for bias and uncertainty is similar to that used by Vermont Yankee for power uprate [6]. In this analysis, six "averaged pressures" are examined on the instrumented replacement dryer at QC2: averaging pressure sensors P1, P2, and P3; P4, P5, and P6; P7, P8, and P9; P10, Pll, and P12; P18 and P20; and P19 and P21. These pressure sensors were all on the outer bank hoods of the dryer, and the groups are comprised of sensors located vertically above or below each other.
Bias is computed by taking the difference between the measured and predicted RMS pressure values for the six "averaged pressures", and dividing the mean of this difference by the mean of the predicted RMS. RMS is computed by integrating the PSD across the frequency range of interest and taking the square root 1
- (RMSmeured -RMSpredicted)
BIN
=N 1E Mpredicted(51 where RMSmeasured is the RMS of the measured data and RMSpedicte is the RMS of the predicted data. Summations are over the number of "averaged pressures", or N = 6.
Uncertainty is defined as the fraction computed by the standard deviation IN E(RMSmeasured - RMSpredicted )2 UNCERTAINTY = 1 (5.2) 1~~RIVSpro octo ACM bias and uncertainty results are compiled for specified frequency ranges of interest, as directed by [7] and summarized in Table 5.1. Other random uncertainties, specific to NMP2, are summarized in Table 5.2 and are typically combined with the ACM results by SRSS methods to determine an overall uncertainty for NMP2.
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This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table 5.1. NMP2 bias and uncertainty for specified frequency intervals. A negative bias indicates that the ACM overpredicts the QC2 data in that interval.
((
(3)))
Table 5.2. Bias and uncertainty contributions to total uncertainty for NMP2 plant data.
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This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information,
- 6. Conclusions The C.D.I. acoustic circuit analysis, using full-scale measured data for NMP2:
a) ((
(3)))
b) Predicts that the loads on dryer components are largest for components nearest the main steam line inlets and decrease inward into the reactor vessel.
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This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
- 7. References
- 1. Continuum Dynamics, Inc. 2005. Methodology to Determine Unsteady Pressure Loading on Components in Reactor Steam Domes (Rev. 6). C.D.I. Report No. 04-09 (Proprietary).
- 2. Continuum Dynamics, Inc. 2007. Bounding Methodology to Predict Full Scale Steam Dryer Loads from In-Plant Measurements, with the Inclusion of a Low Frequency Hydrodynamic Contribution (Rev. 0). C.D.I. Report No. 07-09 (Proprietary).
- 3. Nine Mile Point Unit 2 Drawings. 2007. Information provided in files 761E445AF, 197R624, 761E448, 761E448B, 3516-227-3, 0016010001729, 117C4972, 795E257, 921D597, 158B8534, 117C4519, 105D4673, and 795E260.
- 4. Structural Integrity Associates, Inc. 2009. Nine Mile Point Unit 2 Main Steam Line Strain Gage Data Reduction (Rev. 0). SIA Calculation Package No. NMP-26Q-302.
- 5. J. Ferrante. 2009. Evaluation of NMP2 Strain Gage Data for Attenuation Purposes (Rev. 0).
Report No. JAFESC-09-02. Retained in C.D.I. Design Record File No. DRF-C-279E for Constellation Energy.
- 6. Communication from Enrico Betti. 2006. Excerpts from Entergy Calculation VYC-3001 (Rev. 3), EPU Steam Dryer Acceptance Criteria, Attachment I: VYNPS Steam Dryer Load Uncertainty (Proprietary).
- 7. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. TAC No. MD3002. RAI No. 14.67.
- 8. Continuum Dynamics, Inc. 2006. Letter Report Documenting Onset Speeds and Frequencies Anticipated for FIV in Nine Mile Point Nuclear Station Safety Valve Standpipes. Our Ref.
F459/0021 dated 08/16/06.
- 9. Structural Integrity Associates, Inc. 2008. Nine Mile Point Unit 2 Strain Gage Uncertainty Evaluation and Pressure Conversion Factors (Rev. 1). SIA Calculation Package No. NMP-26Q-301.
- 10. Continuum Dynamics, Inc. 2005. Vermont Yankee Instrument Position Uncertainty. Letter Report dated 08/01/05.
- 11. Exelon Nuclear Generating LLC. 2005. An Assessment of the Effects of Uncertainty in the Application of Acoustic Circuit Model Predictions to the Calculation of Stresses in the Replacement Quad Cities Units 1 and 2 Steam Dryers (Revision 0). Document No. AM-21005-008.
- 12. Continuum Dynamics, Inc. 2007. Finite Element Modeling Bias and Uncertainty Estimates Derived from the Hope Creek Unit 2 Dryer Shaker Test (Rev. 0). C.D.I. Report No. 07-27 (Proprietary).
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This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
- 13. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAINo. 14.79.
- 14. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.110.
- 15. BWRVIP-194: BWR Vessel and Internals Project: Methodologies for Demonstrating Steam Dryer Integrity for Power Uprate. EPRI, Palo Alto, CA: 2008. 1016578.
- 16. Continuum Dynamics, Inc. 2009. Stress Assessment of Nine Mile Point Unit 2 Steamh Dryer at CLTP and EPU Conditions (Rev. 0). C.D.I. Report No. 09-26 (Proprietary).
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This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Appendix For power ascension, main steam line pressure data, similar to that shown in Figure 3.2, will be used with the results of the dryer stress analysis to develop limit curves. The limit curve analysis for NMP2 will be patterned after the approach described in [15], wherein two levels of steam dryer performance criteria are described: (1) a Level 1 pressure level based on maintaining the ASME allowable alternating stress value on the dryer, and (2) a Level 2 pressure level based on maintaining 80% of the allowable alternating stress value on the dryer.
To develop sample limit curves for NMP2, stress levels in the dryer were calculated for the current plant acoustic signature, at CLTP conditions, and then used to determine how much the acoustic signature could be increased while maintaining stress levels below the stress fatigue limit. For NMP2, the minimum stress margin at CLTP conditions is 2.89 [16], resulting in the Level 1 and Level 2 stress ratios shown in Table A. 1.
Level 1 limit curves are found by multiplying the main steam line pressure PSD base traces by the square of the limiting stress ratio (2.892 = 8.35), while the Level 2 limit curves are found by multiplying the PSD base traces by 0.64 of the square of the limiting stress ratio (recovering 80% of the stress ratio, or 0.802 x 2.892 = 0.64 x 8.35 = 5.34), as PSD is related to the square of the pressure. Sample limit curves for main steam line A are shown in Figure A. 1.
Table A. 1. Peak Stress Limit Summary for NMP2 Peak Stress Limit 13,600 psi (Level 1) 110,880 psi (Level 2)
Minimum Stress Ratio 2.89 2.31 24
This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)))
Figure A.1. Level 1 (black) and Level 2 (red) sample limit curves for main steam line A, compared against the base curves (blue) over the frequency range of interest: A upper strain gage location (top); A lower strain gage location (bottom).
25