ML15191A251
Letter Sequence Meeting | |
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MONTHYEARML15191A2512015-07-0909 July 2015
[Table View]July 9, 2015 Public Meeting: Comanch Peak Pre- Application Meeting, Emergency Diesel Generator Voltage and Frequency Technical Specification Changes Project stage: Meeting ML15191A2282015-07-27027 July 2015 7/9/2015 Summary of Pre-submittal Meeting with Luminant Generation Company LLC to Discuss Submittal for License Amendment Request to Revise Technical Specification 3.8.1 for Comanche Peak Nuclear Power Plant, Units 1 and 2 (TACs MF6311 and Project stage: Meeting 2015-07-27 |
ML15191A251 | |
Person / Time | |
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Site: | Comanche Peak ![]() |
Issue date: | 07/09/2015 |
From: | Lisa Regner Plant Licensing Branch IV |
To: | Flores R Luminant Generation Co |
Singal B | |
References | |
TAC MF6311, TAC MF6312 | |
Download: ML15191A251 (10) | |
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Category:Meeting Agenda
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Operating for Comanche Peak Nuclear Power Plant, Unit Nos. 1 and 2 ML19311C2122019-11-13013 November 2019 Summary of November 5, 2019, Teleconference with Vistra Operations Company LLC to Discuss a Proposed License Amendment Request to Change TS 3.8.1, Ac Sources - Operating for Comanche Peak Nuclear Power Plant, Unit Nos. 1 and 2 ML18275A3142018-10-16016 October 2018 Summary of September 17, 2018, Public Teleconference with Vistra Operations Company, LLC, on Proposed Changes to the Emergency Plan for Comanche Peak Nuclear Power Plant, Unit Nos. 1 and 2 ML17137A1742017-05-22022 May 2017 Summary of Conference Call Regarding the Spring 2017 Steam Generator Tube Inspections ML16194A4962016-07-12012 July 2016 Summary of Annual Performance Assessment Meeting and Public Open House Regarding Comanche Peak Nuclear Power Plant 2015 Performance ML15191A2282015-07-27027 July 2015 7/9/2015 Summary of Pre-submittal Meeting with Luminant Generation Company LLC to Discuss Submittal for License Amendment Request to Revise Technical Specification 3.8.1 for Comanche Peak Nuclear Power Plant, Units 1 and 2 (TACs MF6311 and ML15191A2512015-07-0909 July 2015 July 9, 2015 Public Meeting: Comanch Peak Pre- Application Meeting, Emergency Diesel Generator Voltage and Frequency Technical Specification Changes ML14188C4402014-07-22022 July 2014 6/3/2014 Summary of Meeting with Luminant Generation Company LLC to Discuss Proposed Modifications to Technical Specifications to Install Backup Transformer XST1A for Comanche Peak, Units 1 and 2 ML13067A0292013-03-15015 March 2013 2/28/13 - Summary of Meeting Via Conference Call with Luminant to Discuss Generic Safety Issue 191, Assessment of Debris Accumulation on PWR (Pressurized-Water Reactor) Sump Performance, for Comanche Peak, Units 1 and 2 ML12341A0812012-12-18018 December 2012 Summary of 11/15/12 Meeting with Luminant Generation Company LLC to Discuss Indirect License Transfers for Comanche Peak Nuclear Power Plant, Units 1 and 2 ML12332A3652012-12-18018 December 2012 Summary of Meeting with Luminant Generation Company LLC, to Discuss License Amendment Request for Approval of Revised Spent Fuel Criticality Analysis to Update Comanche Peak, Units 1 and 2, Technical Specifications (TAC Nos. ME8896-ME8897) ML12283A3502012-10-25025 October 2012 Summary of 9/13/12 Meeting with Luminant Generation Company LLC to Discuss Proposed License Request for Approval of Revised Spent Fuel Criticality Analysis to Update Comanche Peak, Units 1 and 2, Technical Specifications ML12229A5042012-09-19019 September 2012 8/6/2012 Summary of Conference Call with Luminant to Discuss Proposed License Amendment Request to Revise Technical Specification 3.8.1, AC Sources - Operating, to Support Installation of Backup Transformer at Comanche Peak, Units 1 and 2 ML12188A6972012-07-18018 July 2012 6/26/12 Summary of Meeting with Luminant Generation Company LLC to Discuss Proposed License Amendment Request to Revise TS 3.8.1, AC Sources - Operating, to Support Installation of Backup Transformer at Comanche Peak, Units 1 and 2 (TAC ME8 ML12072A3432012-03-12012 March 2012 3/6/2012 Summary of Meeting with Luminant Generation Company, LLC Regarding Planned Modifications to Resolve Fire Protection Circuit Interactions ML1125904822011-10-14014 October 2011 Summary of Meeting with Luminant to Discuss Comanche Peak, Units 1 and 2, Proposed Request to Adopt Risk-Informed Technical Specification Task Force Initiative 8a, Relocate LCOs for RPS and ESFAS Instrumentation to Licensee Control ML1114001482011-05-23023 May 2011 Summary of Conference Call on 4/14/2011 with Nrr/Dci/Csgb Regarding the Spring 2011 Steam Generator Tube Inspections ML1114003142011-05-19019 May 2011 Summary of Public Meeting with Luminant Generation Company on Comanche Peak Nuclear Power Plant, Units 1 and 2, to Discuss 2010 End of Cycle Performance Assessment ML1108004622011-03-28028 March 2011 3/17/11 Summary of Closed Meeting with Luminant Generation Company Via Conference Call to Discuss Generic Request for Additional Information Pertaining to Its Cyber Security Submittal ML1101908002011-01-18018 January 2011 Summary of Meeting with Luminant Generation Company LLC Regarding a Preliminary Finding with Moderate Safety Significance ML1034205662010-12-22022 December 2010 Memo Summary of the November 3, 2010, Public Meeting with the United States - Advanced Pressurized Water Reactor Design Centered Working Group to Discuss Inspections, Test, Analyses, and Acceptance Criteria, Conceptual Design Information. ML1016501752010-06-21021 June 2010 6/10/10 Summary of Closed Meeting with Luminant Generation Company, LLC to Discuss Comanche Peak Nuclear Power Plant, Units 1 and 2 Implementation Plan/Information Pertaining to Defensive Strategy for Cyber Security Submittal ML1013906402010-05-19019 May 2010 Summary of Public Meeting with Luminant Generation Company on Comanche Peak Nuclear Power Plant, Units 1 and 2, 2009 Performance ML0924401642009-09-14014 September 2009 Meeting Summary, Pre-Application Meeting on with Luminant Generation Company LLC to Dicuss Future Amendment Request to Revise Comanche Peak Units 1 and 2 Startup Transformer Completion Times ML0919705782009-07-31031 July 2009 Summary of Category 1 Meeting with Luminant Generation Company LLC, Resolution of Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized-Water Reactors ML0918303012009-07-0202 July 2009 Summary of Annual Performance Assessment Meeting for Comanche Peak Steam Electric Stations ML0729204682007-10-29029 October 2007 09/25/2007, Summary of Meeting Between the U.S. Nuclear Regulatory Commission Staff and Strategic Teaming and Resource Sharing Representatives to Discuss License Renewal Activities ML0720005052007-07-31031 July 2007 Summary of Meeting with Txu Generation Company LP to Discussed Regarding the Plans for Methodology Transition and Power Uprate ML0717200702007-06-20020 June 2007 Summary of Meeting with Txu Power Regarding Comanche Peak Steam Electric Stations End-of-Cycle Assessment for 2006 ML0612204362006-05-18018 May 2006 Attachment 3 to Comanche Peak Conference Call 2024-01-30 |
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Luminant Pre-Application Meeting AgendaTim Hope, Mgr, Nuclear LicensingIntroductionsRob Slough, Consulting Licensing AnalystCurrent TS 3.8.1 and Proposed SR ChangesJim Andrachek, WestinghouseEvaluation Methodology NRC StaffQuestions/Feedback Tim Hope, Mgr, Nuclear LicensingClosing remarks/summary Need for the Proposed Changes*During several Component Design Basis Inspections (CDBIs), NRC Inspectors have questioned whether the impacts of the allowable tolerances in DG frequency and voltage have been evaluated with respect to ECCS performance.*Issue raised at Comanche Peak during CDBIs in 2010 and 2013, documented in Inspection Reports 2010-006 and 2013-007.*The PWROG developed a methodology to generically address the issue and requested that the NRC recognize that a licensee awaiting NRC approval of the methodology is taking timely corrective action. NRC stated that they do not agree, and that licensees should not wait for approval to take corrective action.
1.The proposed changes would revise Technical Specifications (TS) 3.8.1, "AC Sources -Operating," Surveillance Requirements (SRs) related to Diesel Generator (DG) voltage (V), and frequency (Hz) to:*Specify a nominalvoltage and frequency in SR 3.8.1.2*Increase the steady state lower voltage limit and narrow (i.e., reduce) the steady state frequency range specified in SRs:3.8.1.73.8.1.15 3.8.1.113.8.1.19 3.8.1.123.8.1.202.The note in SR 3.8.1.13 will be deleted as it contains out-of-date information for Unit 2 that no longer applies to the SR.
Summary of Proposed Changes Proposed SR ChangesCurrent LimitsProposed LimitsVoltage>6480 -<7150 V>
6555-<7150 VFrequency>58.8 -<61.2 Hz>
59.4-<60.6 Hz Benefit of Proposed Changes The proposed changes will ensure that the effect of variations in EDG steady state
voltage and frequency, associated with the
EDG voltage regulator and governor, on the equipment powered by the EDGs has
been evaluated to ensure that the
equipment will continue to perform their specified safety functions.
Precedents*On April 11, 2013, the NRC issued Amendment No. 224, Docket No.
50-361, to Wolf Creek Generating Station Unit No. 1. The amendment revised the TS 3.8.1, "AC Sources -Operating, Surveillance Requirements related to diesel generator test loads, voltage, and frequency. (ML13077A147) *On October 21, 2014, the NRC issued Amendment No. 307, Docket Nos. 50-317 and 50-318, to Calvert Cliffs Nuclear Power Plant Unit Nos. 1 and 2. The amendment revised the TS 3.8.1, "AC Sources -Operating, Surveillance Requirement (SR) 3.8.1.17 and modified SRS 3.8.1.8, 3.8.1.11, and 3.8.2.1. The revisions were related to diesel generator (DG) testing duration, loading requirements, and frequency of DG sequencer testing. (ML14280A522)
Schedule Luminant Power expects to submit LAR 15-001 for Staff review by
August 31, 2015, to be implemented
no later than 120 days after issuance
of the License Amendment.
Description of Methodology 1.Determine the affect of EDG steady-state frequency and voltage tolerances associated with the governor and voltage regulator on:-Essential motor loads such as:*Emergency Core Cooling System (ECCS) pumps,
- Motor-operated valves (MOVs),
- Fans and blowers credited in the dose consequence analyses, consistent with the Ventilation Filter Testing Program.-EDG loading calculations
-EDG fuel oil consumption calculations2.Combine the frequency and voltage tolerances with other uncertainties to revise the pump inservice test (IST) curves to account for these tolerances.3.Revise the affected SRs to include the frequency and voltage tolerances and ensure that the EDG operates within the specified tolerance bands.
Example of the Methodology to Adjust the Pump IST Curves Figure 515002000 25003000350040000100200300400500600Flow (GPM)TDH (Feet)Minimum CurveVendor CurveMeasurment UncTotal Unc Questions? Feedback?