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MONTHYEARML17275A0692017-09-29029 September 2017 Application to Revise Technical Specifications to Adopt Technical Specification Task Force (TSTF)-500, Revision 2, DC Electrical Rewrite-Update to TSTF-360. Project stage: Request ML17298A6102017-10-25025 October 2017 Acceptance Review - Peach Bottom Units 2 and 3 - TSTF-500 Amendment Request Project stage: Acceptance Review ML18213A2712018-08-0101 August 2018 Application to Revise Technical Specifications to Adopt TSTF-500, Revision 2, DC Electrical Rewrite Update to TSTF-360, - Supplement 1, Revision of Implementation Dates. Project stage: Supplement ML18228A6762018-08-14014 August 2018 Request for Additional Information - Adopt TSTF-500 Battery TS Changes LAR Project stage: RAI ML18227A6102018-08-14014 August 2018 Supplemental Information to Support Application to Revise Technical Specifications to Adopt Technical Specification Task Force (TSTF)-500, Revision 2, DC Electrical Rewrite Update to TSTF-360. Project stage: Supplement ML18240A1742018-08-28028 August 2018 Request for Additional Information (Final) - Adopt TSTF-500 Battery TS Changes LAR Project stage: RAI ML18257A0172018-09-14014 September 2018 Response to Request for Additional Information Application to Revise Technical Specifications to Adopt Technical Specification Task Force (TSTF)-500, Revision 2, DC Electrical Rewrite Update to ... Project stage: Response to RAI ML18249A2402018-09-28028 September 2018 Issuance of Amendment Nos. 320 and 323 Regarding the Adoption of TSTF-500, DC Electrical Rewrite - Update to TSTF-360 Project stage: Approval 2018-08-14
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Category:E-Mail
MONTHYEARML24002A7132023-12-29029 December 2023 Supplement - Peach Bottom Security Rule Exemption Request ISFSI Docket No. Reference (EPID L-2023-LLE-0032) (Updated) (Email) ML23352A3242023-12-18018 December 2023 Acceptance of Requested Licensing Action Request for Alternative Schedule to Complete Decommissioning Beyond 60 Years of Permanent Cessation of Operations (EPID L- 2023-LLN-0004) ML23331A9112023-11-22022 November 2023 Supplement - Peach Bottom Security Rule Exemption Request ISFSI Docket No. Reference ML23304A0182023-10-30030 October 2023 NRR E-mail Capture - Final RCI - Constellation Energy Generation, LLC - Peach Bottom 2 & 3 - Exemption from Security Rule (L-2023-LLE-0032) ML23264A7992023-09-21021 September 2023 NRR E-mail Capture - Final RAI - Constellation Energy Generation, LLC Fleet Request License Amendment Request to Adopt TSTF-580, Revision 1 ML23237B3972023-08-24024 August 2023 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request - Acceptance of Alternative Request to Use Updated BWRVIP Guidelines ML23163A2292023-06-12012 June 2023 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request - Acceptance of License Amendment Request to Adopt TSTF-580, Revision 1 ML22354A2622022-12-20020 December 2022 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request - Acceptance of Request to Use Certain Provisions of the 2019 Edition of the ASME BPV Code, Section XI ML22325A0052022-11-18018 November 2022 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request - Acceptance of License Amendment Request to Adopt TSTF-273-A, Revision 2 ML22200A0782022-07-19019 July 2022 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request to Use Honeywell Mururoa V4F1 R Supplied Air Suits ML22118A3312022-04-28028 April 2022 NRR E-mail Capture - Peach Bottom - Formal RAI for Proposed Alternative I5R-14, Revision 1 ML22041B5362022-02-10010 February 2022 NRR E-mail Capture - Constellation Energy Generation, LLC - Request for Additional Information Regarding Fleet License Amendment Request to Adopt TSTF-541 ML22024A1852022-01-24024 January 2022 Acceptance for Review of Relief Request Associated with Reactor Pressure Vessel N-16A Nozzle Repair ML22020A0642022-01-13013 January 2022 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Proposed Fleet Alternative for Repair of Water Level Instrumentation Partial Penetration Nozzles ML21301A0672021-10-28028 October 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Acceptance of License Amendment Request to Adopt TSTF-541 ML21256A1902021-09-10010 September 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Transfer Application ML21252A0482021-09-0707 September 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Fleet Alternative Request for Repair of Water Level Instrumentation Partial Penetration Nozzles ML21215A3502021-08-0303 August 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Acceptance of License Amendment Request to Adopt TSTF-554 ML21154A0142021-05-28028 May 2021 NRR E-mail Capture - Extension of Comment Period for the Exelon Generation Company, LLC License Transfer Application ML21154A0132021-05-28028 May 2021 NRR E-mail Capture - Extension of Comment Period for the Exelon Generation Company, LLC License Transfer Application ML21154A0112021-05-28028 May 2021 NRR E-mail Capture - Extension of Comment Period for the Exelon Generation Company, LLC License Transfer Application ML21144A2132021-05-24024 May 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Transfer Application ML21134A0152021-05-14014 May 2021 Acceptance Ventilation Filter Testing LAR ML21117A0442021-04-26026 April 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Proposed Fleet Alternative to Documentation Requirements for Pressure Retaining Bolting ML21084A2532021-03-24024 March 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Acceptance of License Transfer Application ML21062A0652021-03-0101 March 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Proposed Fleet Alternative to Documentation Requirements for Pressure Retaining Bolting ML21049A2572021-02-18018 February 2021 Request for Additional Information Byron/Dresden Proposed Changes to Site Emergency Plans to Support Post-Shutdown and Permanently Defueled Conditions (EPID-2020-LLA-0240 & EPID-2020-LLA-0237) ML21091A1782021-02-0202 February 2021 Ti 2515/194 Inspection Documentation Request ML21033A8552021-02-0202 February 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Fleet Alternative Request to Expand the Use ASME Codes Cases N-878 and N-880 ML21012A1302021-01-12012 January 2021 Request for Additional Information - TSTF-505 ML20357A0972020-12-21021 December 2020 Request for Additional Information - TSTF-505 ML20350B5582020-12-14014 December 2020 NRR E-mail Capture - Exelon Generation Company, LLC -Alternative Request for Documentation of Replacement of Pressure Retaining Bolting ML20343A3492020-12-0707 December 2020 Acceptance of Requested Licensing Action: Peach Bottom Relief Request for N-16 Nozzle ML20324A6472020-11-19019 November 2020 Acceptance of Requested Licensing Action: Peach Bottom One-time Exemption App. B Sect. VI.C.3.(I)(1) Force on Force (COVID-19) ML20314A0282020-11-0606 November 2020 Verbal Relief for Penetration Nozzle ML20283A7722020-10-0909 October 2020 Submittal of Pennsylvania Letter Requesting Exemption from Biennial Exercise Requirements for Pennsylvania Nuclear Power Plants in Calendar Year 2020 ML20276A0762020-10-0202 October 2020 Acceptance of Requested Licensing Action, One-Time Acceptance for Review - Peach Bottom of Exemption from 10 CFR 50, Appendix E, Biennial Emergency Preparedness Exercise Requirements Due to COVID-19 Pandemic ML20266G3032020-09-22022 September 2020 NRR E-mail Capture - Exelon Generation Company, LLC - Fleet Request to Use Paragraph IWA-5120 of the 2017 Edition of the ASME B&PV Code, Section XI ML20239A7982020-08-25025 August 2020 NRR E-mail Capture - Exelon Generation Company, LLC - Fleet License Amendment Request to Adopt TSTF-568, Revision 2 ML20217L3462020-08-0404 August 2020 Audit Plan Regarding License Amendment Request to Implement Riskinformed Extended Completion Times (L-2020-LLA-0120) ML20191A0182020-07-0101 July 2020 NRR E-mail Capture - Exelon Fleet RR for SPI for Appendix J Valves ML20178A1392020-06-26026 June 2020 Acceptance Review for Peach Bottom - License Amendment Request for TSTF-505 ML20153A7042020-06-0101 June 2020 NRR E-mail Capture - Preliminary RAI for Fleet Request to Use Alternative OMN-26 ML20149K4312020-05-22022 May 2020 NRR E-mail Capture - Exelon Generation Company, LLC - Acceptance of License Amendment Request to Adopt TSTF-566 ML20135H1972020-05-14014 May 2020 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Request to Extend Safety Relief Valve Test Interval ML20122A2302020-05-0101 May 2020 NRR E-mail Capture - Exelon Generation Company, LLC - Acceptance of Fleet License Amendment Request to Adopt TSTF-566 ML20077F6112020-03-16016 March 2020 E-mail: the U.S. Nuclear Regulatory Commission'S Record of Decision Regarding Exelon'S Subsequent License Renewal Application for Peach Bottom Atomic Power Station Units 2 and 3 ML20070R2282020-03-10010 March 2020 Request for Additional Information - RR ML20063G1362020-02-27027 February 2020 NRR E-mail Capture - Exelon Generation Company, LLC -Acceptance of Proposed Alternative to Extend Safety Relief Valve Test Frequency (EPIDs L-2020-LLR-0014 Through L-2020-LLR-0018) ML20057E5562020-02-26026 February 2020 Availability of the Final Supplemental Environmental Impact Statement for Subsequent License Renewal of Peach Bottom Atomic Power Station, Units 2 and 3 2023-09-21
[Table view] Category:Request for Additional Information (RAI)
MONTHYEARIR 05000277/20244012023-10-0505 October 2023 Information Request for the Cybersecurity Baseline Inspection, Notification to Perform Inspection 05000277/2024401 and 05000278/2024401 ML23264A7992023-09-21021 September 2023 NRR E-mail Capture - Final RAI - Constellation Energy Generation, LLC Fleet Request License Amendment Request to Adopt TSTF-580, Revision 1 ML22118A3312022-04-28028 April 2022 NRR E-mail Capture - Peach Bottom - Formal RAI for Proposed Alternative I5R-14, Revision 1 ML22041B5362022-02-10010 February 2022 NRR E-mail Capture - Constellation Energy Generation, LLC - Request for Additional Information Regarding Fleet License Amendment Request to Adopt TSTF-541 ML22021A5692022-01-21021 January 2022 Information Request for the Cyber Security Baseline Inspection, Notification to Perform Inspection 05000277/2022403 and 05000278/2022403 ML22020A0642022-01-13013 January 2022 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Proposed Fleet Alternative for Repair of Water Level Instrumentation Partial Penetration Nozzles ML21256A1902021-09-10010 September 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Transfer Application ML21144A2132021-05-24024 May 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Transfer Application ML21062A0652021-03-0101 March 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Proposed Fleet Alternative to Documentation Requirements for Pressure Retaining Bolting ML21049A2572021-02-18018 February 2021 Request for Additional Information Byron/Dresden Proposed Changes to Site Emergency Plans to Support Post-Shutdown and Permanently Defueled Conditions (EPID-2020-LLA-0240 & EPID-2020-LLA-0237) ML21035A2222021-02-0404 February 2021 Notification of Conduct of a Fire Protection Team Inspection ML21091A1782021-02-0202 February 2021 Ti 2515/194 Inspection Documentation Request ML21012A1302021-01-12012 January 2021 Request for Additional Information - TSTF-505 ML20357A0972020-12-21021 December 2020 Request for Additional Information - TSTF-505 ML20296A3342020-10-21021 October 2020 ISI Remote Inspection - Supplemental Request for Information ML20239A7982020-08-25025 August 2020 NRR E-mail Capture - Exelon Generation Company, LLC - Fleet License Amendment Request to Adopt TSTF-568, Revision 2 ML20153A7042020-06-0101 June 2020 NRR E-mail Capture - Preliminary RAI for Fleet Request to Use Alternative OMN-26 ML20135H1972020-05-14014 May 2020 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Request to Extend Safety Relief Valve Test Interval ML20070R2282020-03-10010 March 2020 Request for Additional Information - RR ML19303D1662019-10-31031 October 2019 Requests for Additional Information for the Environmental Review of the Peach Bottom Subsequent License Renewal Application - Set 2 (EPID No. L-2018-RNW-0013)- RAIs ML19232A1752019-08-20020 August 2019 Request for Additional Information - TSTF-500 Implementation LAR ML19140A2832019-05-15015 May 2019 Email - Peach Bottom Atomic Power Station, Units 2 and 3 Second Round RAI Request - Set 1 ML19140A2822019-05-15015 May 2019 027 Pb FU RAI Subsequent to Clarification Call - Cu Greater than 15 Zn Holston (Jg) ML19253D2932019-05-0707 May 2019 002 Attachment 4D Confirmation Water Chemistry Chereskin Revised (002) ML19249C7252019-05-0303 May 2019 SLRA Requests for Additional Information - Set 2 May 3, 2019 ML19108A4282019-04-10010 April 2019 RAIs SLRA Set 1_ERO(Rev 1) ML19079A0232019-03-19019 March 2019 Licensed Operator Positive Fitness-For-Duty Test ML19058A2902019-02-27027 February 2019 Request for Additional Information - High Pressure Service Water One Time TS Change ML19037A4832019-02-0606 February 2019 NRR E-mail Capture - Clarification Questions Associated with Staff Assessment of Peach Bottom Seismic Probabilistic Risk Assessment Report Dated August 28, 2018 ML19028A0062019-01-25025 January 2019 Secondary Containment LAR Requests for Additional Information ML19017A0472019-01-16016 January 2019 Request for Additional Information - High Pressure Service Water One Time TS Change ML18348B0292018-12-13013 December 2018 Subsequent License Renewal Severe Accident Mitigation Alternatives Requests for Additional Information ML19010A3832018-12-0707 December 2018 Additional Documents Needed for Peach Bottom SLR Environmental Review ML18324A6742018-11-15015 November 2018 Request for Additional Information (FINAL)- LAR to Allow 2SRV/SVs OOS at High Pressure ML18312A4072018-11-0808 November 2018 Request for Additional Information (Public) - LAR to Allow 2SRV/SVs OOS at High Pressure ML18276A0202018-10-0202 October 2018 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Amendment Request to Revise Emergency Plan for Limerick and Peach Bottom ML18240A1742018-08-28028 August 2018 Request for Additional Information (Final) - Adopt TSTF-500 Battery TS Changes LAR ML18239A1322018-08-27027 August 2018 Request for Additional Information Final - Relief Request I5R-04 ML18228A6762018-08-14014 August 2018 Request for Additional Information - Adopt TSTF-500 Battery TS Changes LAR ML18226A2012018-08-14014 August 2018 Request for Additional Information - Relief Request I5R-05 ML18214A2812018-08-0202 August 2018 Request for Additional Information Draft - Relief Request I5R-02 ML18200A2742018-07-17017 July 2018 Request for Additional Information 2nd Round (Final) - Adopt 50.69 License Amendment ML18192A1192018-07-10010 July 2018 Request for Additional Information 2nd Round (Final) - Adopt 50.69 License Amendment ML18178A4772018-06-27027 June 2018 Request for Additional Information 2nd Round - Adopt 50.69 License Amendment ML18096B5062018-04-0606 April 2018 Request for Additional Information Exelon Generation Company, LLC Requested Amendment to Adopt 10 CFR 50.69 for Risk-informed Categorization and Treatment of Structures, Systems and Components ML18094B0832018-04-0505 April 2018 Enclosurequest for Additional Information (Letter to P. Duke RAI Regarding Entergy Operations, Inc.'S Decommissioning Funding Plan Update for Salem and Hope Creek, and Peach Bottom ISFSIs Docket Nos. 72-48 and 72-29) ML18067A1482018-03-0808 March 2018 Enclosurequest for Additional Information (Letter to P. R. Simpson Request for Additional Information Regarding Exelon Generating Company, Llc'S Decommissioning Funding Plan Update for Independent Spent Fuel Storage Installation) ML17317B5502017-11-0909 November 2017 Licensed Operator Positive Fitness-For-Duty Test ML17240A0062017-08-24024 August 2017 Request for Additional Information Regarding License Amendment Request for Measurement Uncertainty Recapture Power Uprate ML17222A0962017-08-10010 August 2017 Request for Additional Information - Amendment Request Regarding Safety Relief Valve and Safety Valce Operability for Cycle 22 2023-09-21
[Table view] |
Text
From: Tobin, Jennifer To: "Helker, David P:(GenCo-Nuc)"
Cc: "Mascitelli, Francis J:(GenCo-Nuc)"; "Gropp Jr, Richard W:(GenCo-Nuc)"
Subject:
Peach Bottom Units 2 and 3 - Request for Additional Information (FINAL) - Adopt TSTF-500 Battery TS Changes LAR (EPID L-2017-LLA-0312)
Date: Tuesday, August 28, 2018 10:39:00 AM Attachments: Peach Bottom Final RAIs TSTF500.docx
Dear Mr. Helker,
By letter dated September 29, 2017 (Agencywide Documents Access and Management System (ADAMS)
Accession No. ML17275A069), Exelon Generation Company, LLC (EGC, the licensee) requested changes to the Technical Specifications (TSs) for Peach Bottom Atomic Power Station (PBAPS), Units 2 and 3, to adopt U.S.
Nuclear Regulatory Commission (NRC)-approved Technical Specification Task Force (TSTF) 500, Revision 2, DC [direct current] Electrical Rewrite - Update to TSTF 360. The License Amendment Request (LAR) proposes to revise TS requirements related to DC electrical power systems in TS limiting condition for operation (LCO) 3.8.4, "DC Sources - Operating," LCO 3.8.5, "DC Sources - Shutdown," and LCO 3.8.6, "Battery Cell Parameters." A new "Battery Monitoring and Maintenance Program" is being proposed for TS 5.5, "Programs and Manuals."
The Nuclear Regulatory Commissions (NRC) staff is reviewing your submittal and has determined that additional information is needed to complete its review. The specific request for additional information (RAI) questions are provided below (and attached for your convenience). A clarification phone call was held August 21, 2018. A response to these RAIs is requested by September 14, 2018.
If you have any questions, please contact me at (301) 415-2328. A copy of this e-mail will be made publicly available in ADAMS.
- Thanks, Jenny Jenny Tobin Project Manager NRR/DORL/LPL-1 Office O9-C12 Phone 301-415-2328 REQUEST FOR ADDITIONAL INFORMATION OFFICE OF THE NUCLEAR REACTOR REGULATION LICENSE AMENDMENT REQUEST TO REVISE TECHNICAL SPECIFICATIONS TO ADOPT TECHNICAL SPECIFICATION TASK FORCE (TSTF) -500, REVISION 2, DC ELECTRICAL REWRITE - UPDATE TO TSTF-360 EXELON GENERATION PEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3 NRC DOCKET NOS. 050-277 AND 050-278 By application dated September 29, 2017 (Agencywide Documents Access and Management System (ADAMS)
Accession No.ML17275A069), Exelon Generation Company, LLC (EGC, the licensee) requested changes to the Technical Specifications (TSs) for Peach Bottom Atomic Power Station (PBAPS), Units 2 and 3, to adopt U.S.
Nuclear Regulatory Commission (NRC)-approved Technical Specification Task Force (TSTF) 500, Revision 2, DC [direct current] Electrical Rewrite - Update to TSTF360. The License Amendment Request (LAR) proposes to revise TS requirements related to DC electrical power systems in TS limiting condition for operation (LCO) 3.8.4, "DC Sources - Operating," LCO 3.8.5, "DC Sources - Shutdown," and LCO 3.8.6, "Battery Cell Parameters." A new "Battery Monitoring and Maintenance Program" is being proposed for TS 5.5, "Programs and Manuals."
EEOB RAI -1 Regulatory Requirement
- 1. Title 10 of the Code of Federal Regulations, Part 50 (10 CFR 50)
The regulation at Appendix A to 10 CFR 50, General Design Criterion (GDC) 17, Electric power systems, states, in part, that:
An onsite electric power system and an offsite electric power system shall be provided to permit functioning of structures, systems, and components important to safety.
The onsite electric power supplies, including the batteries, and the onsite electric distribution system, shall have sufficient independence, redundancy, and testability to perform their safety functions assuming a single failure.
- 2. The regulation at 10 CFR Part 50, Appendix A, GDC 18, Inspection and testing of electric power systems, states, in part, that [e]lectric power systems important to safety shall be designed to permit appropriate periodic inspection and testing of important areas and features.
EEOB RAI-1 of the LAR discusses TS 3.8.4 new Condition D., current Condition C. (revised and renumbered to Condition E.), associated Required Actions and CTs for Required Actions.
Additionally, in Section 2.2.5 in Attachment 1of the LAR, the licensee states, PBAPS will not be requesting a Completion Time longer than 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> for an inoperable battery or greater than 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> for an inoperable DC subdivision for other reasons than an inoperable battery or inoperable battery charger.
The Reviewer Note for TSTF Section 3.8.4 Required Action B.1.2 stated that Condition B (D in LAR) is included if Required Action B.1 (D.1 in LAR) (One [or two] batter[y][ies on one subsystem] inoperable) and Required Action C.1 (E.1 in LAR) (One DC electrical power subsystem inoperable for reasons other than Condition A [or B]), (C [or D in LAR]) would have different Completion Times. If the plant design supports different Completion Times when a battery is inoperable but the charger is OPERABLE, then Condition B (D in LAR) is used. If not, Condition B (D in LAR) is deleted and only Condition C (E in LAR) is used.
Since Section 2.2.5 in Attachment 1of LAR stated that PBAPS would like to keep the same (2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />) Completion Time for both Required Action D.1 for an inoperable battery and Required Action E.1 for an inoperable DC subdivision for other reasons than an inoperable battery or inoperable battery charger, the proposed CONDITION D, Required Action D.1 and CT for Required Action D.1 appears to be duplicative.
Further, the proposed new Condition D (one battery on one subsystem inoperable) in the LAR would be acceptable if the new Condition D and revised Condition E (one unit 2/3 DC electrical power subsystem inoperable) have different CTs. But the proposed Condition D and revised Condition E have the same CTs (2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />), which means that the new Condition D should not be adopted.
The NRC staff requests the licensee to provide justification for deviation from the TSTF-500, Revision 2 for adoption of new Condition D with same CTs (2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />) for new Required Actions D.1 and E.1.
EEOB RAI -2 Regulatory Requirement
- 1. Title 10 of the Code of Federal Regulations, Part 50 (10 CFR 50)
The regulation at Appendix A to 10 CFR 50, General Design Criterion (GDC) 17, Electric power systems, states, in part, that:
An onsite electric power system and an offsite electric power system shall be provided to permit functioning of structures, systems, and components important to safety.
The onsite electric power supplies, including the batteries, and the onsite electric distribution system, shall have sufficient independence, redundancy, and testability to perform their safety functions assuming a single failure.
- 2. The regulation at 10 CFR Part 50, Appendix A, GDC 18, Inspection and testing of electric power systems, states, in part, that [e]lectric power systems important to safety shall be designed to permit appropriate periodic inspection and testing of important areas and features.
TS Section 5.5.15.b.2, Battery Monitoring and Maintenance Program in Attachment 2 of the LAR states, Actions to determine whether the float voltage of the remaining battery cells is = 2.07 V when the float voltage of a battery cell has been found to be < 2.13 V. However, TS 5.5.14.b.2, Battery Monitoring and Maintenance Program, of TSTF-500, Revision 2 states, Actions to determine whether the float voltage of the remaining battery cells is =
[2.13] V when the float voltage of a battery cell has been found to be < [2.13] V.
There appears to be a discrepancy between TSTF-500 recommended float voltage = [2.13] V limit and the LAR recommended = 2.07 limit in the proposed TS Section 5.5.15.b.2, Battery Monitoring and Maintenance Program.
Please provide a discussion explaining the discrepancy between = 2.07 V in the LAR and TSTF-500 recommended float voltage = [2.13] V limit in the proposed TS Section 5.5.15.b.2, Battery Monitoring and Maintenance Program.