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| | document type = Letter, Request for Additional Information (RAI) | | | document type = Letter, Request for Additional Information (RAI) |
| | page count = 3 | | | page count = 3 |
| | | project = TAC:ME6831, TAC:ME6832 |
| | | stage = Other |
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| | {{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 November 22, 2011 Mr. George H. Gellrich, Vice President Calvert Cliffs Nuclear Power Plant, LLC Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, MD 20657-4702 REQUEST FOR ADDITIONAL INFORMATION REGARDING DIESEL GENERATOR SURVEILLANCE REQUIREMENT 3.8.1.11 -CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT NOS. 1 AND 2 (TAC NOS. ME6831 AND ME6832) Dear Mr. Gellrich: By letter dated August 8, 2011 (Agencywide Documents Access and Management System Accession No. ML 11222A020), Calvert Cliffs Nuclear Power Plant, LLC proposed a license amendment to revise Technical Specification (TS) 3.8.1, "AC Sources -Operating," for the Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 and 2. The proposed amendment would modify TS Surveillance Requirement (SR) 3.8.1.11 by revising the required power factor value to be achieved by the diesel generators during conduct of the surveillance test. The change would also modify a note associated with SR 3.8.1.11. The Nuclear Regulatory Commission staff has concluded that additional information will be required in order to continue its review. As discussed with your staff, we understand that you intend to respond to the enclosed request for additional information within 45 days of the date of this letter. Please contact me at 301-415-1364 if you have any questions. Sincerely, Douglas V. Pickett, Senior Project Manager Plant Licensing Branch 1-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-317 and 50-318 Enclosure: As stated cc w/encl: Distribution via Listserv CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT NOS. 1 AND 2 REQUEST FOR ADDITIONAL INFORMATION DIESEL GENERATOR SURVEILANCE REQUIREMENT 3.8.1.11 In order to demonstrate each diesel generator's (DG's) ability to perform its safety function, Surveillance Requirement (SR) 3.8.1.11 requires the DGs to be loaded to the maximum postulated accident loading (kW and kVAR). The mission time of the DGs is typically greater than 20 days. The amendment request states that the correct power factor values based on design-basis calculations were not incorporated during transition to the Improved Technical Specifications. According to SR 3.8.1.11, the DGs are tested for 2: 60 minutes while loaded to 2: 4000 kW for DG 1A and 2: 3000 kW for DGs 1 B, 2A, and 2B. This SR is performed once every 24 months. Provide a summary of DG loading calculations which detail the real and reactive power loading of the DGs for the postulated accidents. Identify loads that may be manually added via plant-controlled procedures during the postulated worst case events. Verify that the loading calculation includes any impact on the DG loading due to variation in voltage and frequency that is allowable for steady state DG operation and any effects of large pumps operating at run out conditions at the onset of an event. SR 3.8.1.11 requires testing for 2: 60 minutes to ensure the DG's ability to perform its safety function. However, operating experience at some plants with 24-hour surveillance times has identified some weaknesses in the DG systems which would not have been identified if the SR was performed for a lesser duration. Regulatory Guide 1.9, "Application and Testing of Safety-Related Diesel Generators in Nuclear Power Plants," also recommends testing of emergency DGs for 22 hours at nominal rating, and 2 hours at the short term overload capability. Provide justification for not adopting the current regulatory guidance for DG testing. Enclosure November 22, 2011 Mr. George H. Gellrich, Vice President Calvert Cliffs Nuclear Power Plant, LLC Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, MD REQUEST FOR ADDITIONAL INFORMATION REGARDING DIESEL GENERATOR SURVEILLANCE REQUIREMENT 3.8.1.11 CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT NOS. 1 AND 2 (TAC NOS. ME6831 AND ME6832) Dear Mr. Gellrich: By letter dated August 8, 2011 (Agencywide Documents Access and Management System Accession No. ML 11222A020), Calvert Cliffs Nuclear Power Plant, LLC proposed a license amendment to revise Technical Specification (TS) 3.8.1, <lAC Sources -Operating," for the Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 and 2. The proposed amendment would modify TS Surveillance Requirement (SR) 3.8.1.11 by revising the required power factor value to be achieved by the diesel generators during conduct of the surveillance test. The change would also modify a note associated with SR 3.8.1.11. The Nuclear Regulatory Commission staff has concluded that additional information will be required in order to continue its review. As discussed with your staff, we understand that you intend to respond to the enclosed request for additional information within 45 days of the date of this letter. Please contact me at 301-415-1364 if you have any questions. Sincerely, Ira! Douglas V. Pickett, Senior Project Manager Plant Licensing Branch 1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. and Enclosure: As stated cc w/encl: Distribution via Listserv DISTRIBUTION: PUBLIC LPLr/f RidsNrrDorlLpL 1 1 RidsNrrPMCalvertCliffs RMathew RidsNrrDeEeeb RidsOgcMailCenter RidsNrrLASLittle RidsAcrsAcnwMailCenter RidsRegion1 MailCenter GDentel, R1 VGoel, NRR GMatharu, NRR ADAMS ACCESSION NO: ML113070399 OFFICE LPL 1-1/PM LPL1-11LA EEEB/BC LPL1-1/BC NAME DPickett SUttle (ABaxter for) JAndersen by memo dated NSalgado (J8oska for) |
| | * DATE 11/21/11 11/07/11 11/02/11 11/22/11 OFFICIAL RECORDS COPY |
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MONTHYEARML11222A0202011-08-0808 August 2011 License Amendment Request: Diesel Generator Surveillance Requirement 3.8.1.11 Revision Project stage: Request ML1124404592011-09-0101 September 2011 Acceptance Review of Calvert Cliffs Amendment Application (TAC Nos. ME6831-ME6832) Project stage: Acceptance Review ML1130703992011-11-22022 November 2011 Request for Additional Information Regarding Diesel Generator Surveillance Requirement 3.8.1.11 - Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 and 2 Project stage: RAI ML12012A2182012-01-11011 January 2012 Responses to Request for Additional Information Regarding Diesel Generator Surveillance Requirement 3.8.1.11 Project stage: Response to RAI ML1206004592012-03-0808 March 2012 Request for Additional Information Diesel Generator Technical Specification Surveillance Requirement 3.8.1.11 - Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 and 2 Project stage: RAI ML12132A0862012-05-0707 May 2012 Responses to Request for Additional Information Regarding Diesel Generator Surveillance Requirement 3.8.1.11 Project stage: Response to RAI ML12202A0132012-07-18018 July 2012 Revision to a Response to Request for Additional Information Regarding Diesel Generator Surveillance Requirement 3.8.1.11 Project stage: Response to RAI ML12214A2752012-08-22022 August 2012 Amendment Regarding Diesel Generator Surveillance Requirement 3.8.1.11 Project stage: Other 2012-01-11
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Category:Letter
MONTHYEARIR 05000317/20230042024-02-0101 February 2024 Integrated Inspection Report 05000317/2023004 and 05000318/2023004 ML24029A0102024-01-29029 January 2024 Request for Information and Notification of Conduct of IP 71111.21.N.04, Age-Related Degradation, Reference Inspection Report 05000317/2024010 and 05000318/2024010 ML24003A8872024-01-19019 January 2024 Exemption from Select Requirements of 10 CFR Part 73 (EPID L-2023-LLE-0033 (Security Notifications, Reports, and Recordkeeping and Suspicious Activity Reporting)) 05000318/LER-2023-004, Submittal of LER 2023-004-00 for Calvert Cliffs Nuclear Power Plant, Unit 2, Submittal of Automatic Reactor Trip from Reactor Protection System Actuation Due to Loss of Unit Service Transformer2024-01-16016 January 2024 Submittal of LER 2023-004-00 for Calvert Cliffs Nuclear Power Plant, Unit 2, Submittal of Automatic Reactor Trip from Reactor Protection System Actuation Due to Loss of Unit Service Transformer ML24011A0732024-01-11011 January 2024 Proposed Alternative to the Requirements for Repair/Replacement of Saltwater (SW) System Buried Piping 05000318/LER-2023-002, Forward LER 2023-002-00 for Calvert Cliffs Nuclear Power Plant, Unit 2, Automatic Reactor Trip from Reactor Protection System Actuation Due to Loss of Unit Service Transformer2024-01-0808 January 2024 Forward LER 2023-002-00 for Calvert Cliffs Nuclear Power Plant, Unit 2, Automatic Reactor Trip from Reactor Protection System Actuation Due to Loss of Unit Service Transformer 05000318/LER-2023-003, Forward LER 2023-003-00 for Calvert Cliffs Nuclear Power Plant, Unit 2, Manual Actuation of Auxiliary Feedwater System Due to 22 Steam Generator Feedwater Pump Trip2024-01-0808 January 2024 Forward LER 2023-003-00 for Calvert Cliffs Nuclear Power Plant, Unit 2, Manual Actuation of Auxiliary Feedwater System Due to 22 Steam Generator Feedwater Pump Trip ML24005A0222024-01-0505 January 2024 Revised Steam Generator Tube Inspection Reports ML23304A0642024-01-0202 January 2024 Issuance of Amendment No. 349 to Modify the Long-Term Coupon Surveillance Program RS-23-125, Request for Exemption from 10 CFR 2.109(b)2023-12-0707 December 2023 Request for Exemption from 10 CFR 2.109(b) ML23331A2992023-11-27027 November 2023 Submittal of Condition Prohibited by Technical Specifications Due to Failure to Sample Diesel Generator Fuel Oil Storage Tank IR 05000317/20230102023-11-20020 November 2023 Biennial Problem Identification and Resolution Inspection Report 05000317/2023010 and 05000318/2023010 ML23318A4722023-11-14014 November 2023 Supplement to License Amendment Request to Adopt TSTF-59-A ML23317A1032023-11-10010 November 2023 Supplemental Information Letter for Part 73 Exemption Request - Responses to Request for Confirmatory Information ML23317A1192023-11-10010 November 2023 Constellation Energy Generation, LLC - 2023 Annual Report - Guarantees of Payment of Deferred Premiums ML23310A0442023-11-0707 November 2023 Project Manager Assignment IR 05000317/20230402023-11-0202 November 2023 95001 Supplemental Inspection Report 05000317/2023040 and Follow-Up Assessment Letter IR 05000317/20230032023-11-0101 November 2023 Integrated Inspection Report 05000317/2023003 and 05000318/2023003 IR 05000317/20230902023-10-26026 October 2023 Final Significance Determination of a White Finding with Assessment Follow-Up and Notice of Violation; Inspection Report 05000317/2023090 ML23289A1202023-10-16016 October 2023 Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation RS-23-097, Constellation Energy Generation, LLC, Advisement of Leadership Changes and Submittal of Updated Standard Practice Procedures Plans2023-10-12012 October 2023 Constellation Energy Generation, LLC, Advisement of Leadership Changes and Submittal of Updated Standard Practice Procedures Plans RS-23-108, Proposed Alternative for Examinations of Examination Categories B-B, B-D, and C-A Steam Generator Pressure Retaining Welds and Full Penetration Welded Nozzles2023-10-11011 October 2023 Proposed Alternative for Examinations of Examination Categories B-B, B-D, and C-A Steam Generator Pressure Retaining Welds and Full Penetration Welded Nozzles RS-23-105, Proposed Alternative for Examinations of Examination Category C-B Steam Generator Nozzle-to-Shell Welds and Nozzle Inside Radius Sections2023-10-10010 October 2023 Proposed Alternative for Examinations of Examination Category C-B Steam Generator Nozzle-to-Shell Welds and Nozzle Inside Radius Sections ML23279A1202023-10-0606 October 2023 Response to NRC Inspection Report and Preliminary White Finding IR 05000317/20230502023-09-29029 September 2023 Special Inspection Report 05000317/2023050 and Preliminary White Finding and Apparent Violation ML23272A1032023-09-29029 September 2023 Condition Prohibited by Technical Specifications Due to Inoperable Nuclear Instrumentation at Very Low Power IR 05000317/20234012023-09-18018 September 2023 Cyber Security Inspection Report 05000317/2023401 and 05000318/2023401 ML23254A0012023-09-0505 September 2023 Registration of Use of Casks to Store Spent Fuel IR 05000317/20230052023-08-31031 August 2023 Updated Inspection Plan for Calvert Cliffs Nuclear Power Plant, Units 1 and 2 (Report 05000317/2023005 and 05000318/2023005) ML23158A1952023-08-30030 August 2023 R. E. Ginna - Issuance of Amendments to Adopt TSTF-273-A, Revision 2, Safety Function Determination Program Clarifications ML23241A8412023-08-29029 August 2023 Response to Request for Additional Information - Proposed Alternative to the Requirements for Repair/Replacement of Saltwater (SW) System Buried Piping ML23240A3872023-08-28028 August 2023 Senior Reactor and Reactor Operator Initial License Examinations ML23151A3472023-08-21021 August 2023 Issuance of Amendments to Adopt TSTF-295-A, Modify Note 2 to Actions of PAM Table to Allow Separate Condition Entry for Each Penetration ML23219A1662023-08-16016 August 2023 Request for Additional Information Regarding Proposed Alternative to the Requirements for Repair/Replacement of Saltwater (SW) System Buried Piping (EPID: L-2023-LLR-0006) - Non-proprietary ML23228A1002023-08-15015 August 2023 Notification of Readiness for NRC 95001 Inspection ML23188A0402023-08-0808 August 2023 Issuance of Amendment Nos. 346 and 324 Adoption of TSTF-577, Revised Frequencies for Steam Generator Tube Inspections, Revision 1 ML23214A1572023-08-0707 August 2023 Correction to the Renewed Facility Operating License Page 3 in Amendment No 345 IR 05000317/20230022023-08-0303 August 2023 Integrated Inspection Report 05000317/2023002 ML23188A0512023-07-13013 July 2023 Correction to the Renewed Facility Operating License Pages in Amendment Nos. 336 and 314 ML23186A0372023-07-13013 July 2023 Correction to the Renewed Facility Operating License Pages in Amendment Nos. 340 and 318 IR 05000317/20233012023-07-12012 July 2023 Initial Operator Licensing Examination Report 05000317/2023301 and 05000318/2023301 IR 05000317/20230122023-07-10010 July 2023 Commercial Grade Dedication Report 05000317/2023012 and 05000318/2023012 ML23180A2362023-06-29029 June 2023 Correction of Errors on Technical Specification Pages RS-23-083, Withdrawal - Proposed Alternatives Related to the Steam Generators2023-06-27027 June 2023 Withdrawal - Proposed Alternatives Related to the Steam Generators ML23156A6752023-06-20020 June 2023 Request for Withholding Information from Public Disclosure for Proposed Alternative to the Requirements for Repair/Replacement of Saltwater System Buried Piping 2024-02-01
[Table view] Category:Request for Additional Information (RAI)
MONTHYEARML24012A0492024-01-11011 January 2024 Request for Additional Information Regarding Final Response to Generic Letter 2004-02 ML23219A1662023-08-16016 August 2023 Request for Additional Information Regarding Proposed Alternative to the Requirements for Repair/Replacement of Saltwater (SW) System Buried Piping (EPID: L-2023-LLR-0006) - Non-proprietary ML23160A0222023-06-0606 June 2023 NRR E-mail Capture - Calvert Cliffs - Long Term Coupon Surveillance Program RAI ML23156A0102023-06-0404 June 2023 NRR E-mail Capture - Calvert Cliffs - RAI License Amendment Request for Emergency Desiel Generator ML22179A2112022-06-28028 June 2022 Notification of Conduct of a Fire Protection Team Inspection ML22129A0132022-05-0606 May 2022 NRR E-mail Capture - Draft RAIs for Requests for Alternatives I4R-17, I4R-23, ISI-05-018, I6R-10 ML22271A0772022-05-0606 May 2022 NRR E-mail Capture - Final RAIs 9.1.2021 Constellation Relief Request ML22091A0852022-04-0101 April 2022 NRR E-mail Capture - Braidwood and Byron - Final RAI Regarding Proposed Alternative for Various Pressurizer Welds (EPID L-2021-LLR-0035 and 0036) ML22091A2392022-04-0101 April 2022 NRR E-mail Capture - Calvert Cliffs - Formal RAI for Proposed Alternative for Examinations of Certain Pressurizer Welds 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 ML21287A0322021-10-13013 October 2021 Request for Additional Information Re Proposed Alternative for Pressurizer Circumferential and Longitudinal Shell-to-Head Welds and Nozzle-to-Vessel Welds ML21287A0932021-10-0505 October 2021 Request for Additional Information: Calvert Cliffs 1 & 2 LAR to Revise Spent Fuel Pool Cooling - Shutdown Cooling Systems Licensing Basis (EPID L-2021-LLA-0112) (Email) ML21256A1902021-09-10010 September 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Transfer Application ML21187A2232021-07-29029 July 2021 Temporary Instruction 2515/194 Inspection Documentation Request ML21180A1562021-06-28028 June 2021 Request for Additional Information Regarding License Amendment Request Concerning Containment Sump ML21144A2132021-05-24024 May 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Transfer Application ML21130A0382021-05-21021 May 2021 Memo to File - Draft Request for Additional Information Relief Request CISI-03-01 Concerning Containment Unbonded Post-Tensioning System Inservice Inspection Requirements ML21117A0342021-05-0505 May 2021 Request for Additional Information Regarding Proposed Alternative to Use ASME Code Case N-893 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 ML21053A3142021-02-22022 February 2021 Information Request for a Triennial Baseline Design Bases Assurance Inspection (Team); Inspection Report 05000317/2021010 and 05000318/2021010 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) ML21029A3302021-01-29029 January 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Fleet Alternative Request to Use ASME Code Case N-885 ML20275A0032020-09-30030 September 2020 Request for Additional Information Regarding Alternative Request Re Inservice Inspection Impracticality (L-2020-LLR-0089) ML20167A2532020-06-15015 June 2020 Second Request for Additional Information Regarding License Amendment Request Concerning Emergency Diesel Generator Surveillance Requirements for Frequency and Voltage Tolerances ML20157A0782020-06-0505 June 2020 Request for Additional Information Regarding License Amendment Request Concerning Emergency Diesel Generator Surveillance Requirements for Frequency and Voltage Tolerances ML20153A7042020-06-0101 June 2020 NRR E-mail Capture - Preliminary RAI for Fleet Request to Use Alternative OMN-26 ML20135H0132020-05-14014 May 2020 IP 71111.17T (50.59) List of Documents Request ML20083F5892020-03-21021 March 2020 Request for Additional Information Regarding License Amendment Request Concerning Reactor Coolant Pump Flywheel Inspection Program ML19275H1362019-10-0202 October 2019 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Request to Use ASME Code Case N-879 ML19261B2202019-09-18018 September 2019 Request for Additional Information Regarding Final Response to Generic Letter 2004-02 ML19179A0612019-07-19019 July 2019 Three Mile Point 1 - Supplemental Information Needed to Proposed Alternative to Use ASME Code Case N-879 ML19155A1612019-06-11011 June 2019 Changes to Draft Request for Additional Information Request to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Systems, Structures and Components ML19155A1272019-06-0404 June 2019 Request for Additional Information Regarding Request to Adopt 10 CFR 50.69 Risk Informed Categorization and Treatment of Systems, Structures, and Components ML19070A0192019-03-11011 March 2019 Request for Additional Information Regarding Exemption Request from 10CFR50.46(A)(1) to Support Resolution of GSI-191 ML19025A1202019-01-24024 January 2019 NRR E-mail Capture - Calvert Cliffs, Fitzpatrick, and Nine Mile Point - Request for Additional Information Regarding License Amendment Request to Revise Emergency Response Organization Staffing ML18347A3972018-12-13013 December 2018 Request for Additional Information Regarding Relocation of Emergency Operation Facility ML18138A1372018-05-22022 May 2018 Plants, Units 1 and 2 - Request for Additional Information Regarding Risk Informed Technical Specification Completion Times (CAC Nos. MF7415 and MF7416; EPID L-2016-LLA-0001) ML18128A3842018-05-0808 May 2018 Plants, Units 1 and 2 - Draft Request for Additional Information Regarding Risk-Informed Technical Specification Completion Times (CAC Nos. MF7415 and MF7416; EPID L-2016-LLA-0001) ML18102A2372018-04-12012 April 2018 NRR E-mail Capture - Calvert Cliffs, Ginna, and Nine Mile Point - Request for Additional Information Regarding License Amendment Request to Revise Emergency Action Level Schemes (EPID-L-2017-LLA-0237) 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) ML17345A0912018-01-19019 January 2018 Plants, Units 1 and 2 - Request for Additional Information Regarding Alternative Request SI-RR-01, Rev. 0 (CAC Nos. MG0068 and MG0069; EPID L-2017-LLR-0078) ML17346A9092017-12-21021 December 2017 Request for Additional Information Regarding Risk-Informed Technical Specification Completion Times (CAC Nos. MF7415 and MF7416; EPID L-2016-LLA-0001) ML17331B1342017-12-12012 December 2017 2, and R.E. Ginna Nuclear Power Plant - Request for Additional Information - Regarding ML17304A9412017-11-13013 November 2017 Request for Additional Information Regarding Risk-Informed Technical Specification Completion Times (CAC Nos. MF7415 and MF7416; EPID L-2016-LLA-0001) ML17285B1962017-10-27027 October 2017 Request for Additional Information Regarding Generic Letter 2016-01, Monitoring of Neutron-Absorbing Materials in Spent Fuel Pools. ML17075A0152017-03-16016 March 2017 E-mail from R. Guzman to E. Villar - Calvert Cliffs Unit Nos. 1 and 2 - Request for Additional Information License Amendment Request - Control Room Emergency Ventilation System ML17062A4912017-03-0303 March 2017 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Fleet Alternative to RPV Threads in Flange Examination (CAC Nos. MF8712-MF8729) ML16222A1252016-08-0909 August 2016 Request for Additional Information - Relief Request No. RR-ISI-04-11, 2016/08/08 E-mail from R.Guzman to T.Loomis ML15299A2792015-11-0303 November 2015 Request for Additional Information Regarding Relief Request for Dissimilar Metal Butt Welds ML15230A0322015-08-13013 August 2015 Request for Additional Information Regarding the National Association Standard 805 License Amendment Request Fire Protection 2024-01-11
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 November 22, 2011 Mr. George H. Gellrich, Vice President Calvert Cliffs Nuclear Power Plant, LLC Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, MD 20657-4702 REQUEST FOR ADDITIONAL INFORMATION REGARDING DIESEL GENERATOR SURVEILLANCE REQUIREMENT 3.8.1.11 -CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT NOS. 1 AND 2 (TAC NOS. ME6831 AND ME6832) Dear Mr. Gellrich: By letter dated August 8, 2011 (Agencywide Documents Access and Management System Accession No. ML 11222A020), Calvert Cliffs Nuclear Power Plant, LLC proposed a license amendment to revise Technical Specification (TS) 3.8.1, "AC Sources -Operating," for the Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 and 2. The proposed amendment would modify TS Surveillance Requirement (SR) 3.8.1.11 by revising the required power factor value to be achieved by the diesel generators during conduct of the surveillance test. The change would also modify a note associated with SR 3.8.1.11. The Nuclear Regulatory Commission staff has concluded that additional information will be required in order to continue its review. As discussed with your staff, we understand that you intend to respond to the enclosed request for additional information within 45 days of the date of this letter. Please contact me at 301-415-1364 if you have any questions. Sincerely, Douglas V. Pickett, Senior Project Manager Plant Licensing Branch 1-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-317 and 50-318 Enclosure: As stated cc w/encl: Distribution via Listserv CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT NOS. 1 AND 2 REQUEST FOR ADDITIONAL INFORMATION DIESEL GENERATOR SURVEILANCE REQUIREMENT 3.8.1.11 In order to demonstrate each diesel generator's (DG's) ability to perform its safety function, Surveillance Requirement (SR) 3.8.1.11 requires the DGs to be loaded to the maximum postulated accident loading (kW and kVAR). The mission time of the DGs is typically greater than 20 days. The amendment request states that the correct power factor values based on design-basis calculations were not incorporated during transition to the Improved Technical Specifications. According to SR 3.8.1.11, the DGs are tested for 2: 60 minutes while loaded to 2: 4000 kW for DG 1A and 2: 3000 kW for DGs 1 B, 2A, and 2B. This SR is performed once every 24 months. Provide a summary of DG loading calculations which detail the real and reactive power loading of the DGs for the postulated accidents. Identify loads that may be manually added via plant-controlled procedures during the postulated worst case events. Verify that the loading calculation includes any impact on the DG loading due to variation in voltage and frequency that is allowable for steady state DG operation and any effects of large pumps operating at run out conditions at the onset of an event. SR 3.8.1.11 requires testing for 2: 60 minutes to ensure the DG's ability to perform its safety function. However, operating experience at some plants with 24-hour surveillance times has identified some weaknesses in the DG systems which would not have been identified if the SR was performed for a lesser duration. Regulatory Guide 1.9, "Application and Testing of Safety-Related Diesel Generators in Nuclear Power Plants," also recommends testing of emergency DGs for 22 hours2.546296e-4 days <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br /> at nominal rating, and 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> at the short term overload capability. Provide justification for not adopting the current regulatory guidance for DG testing. Enclosure November 22, 2011 Mr. George H. Gellrich, Vice President Calvert Cliffs Nuclear Power Plant, LLC Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, MD REQUEST FOR ADDITIONAL INFORMATION REGARDING DIESEL GENERATOR SURVEILLANCE REQUIREMENT 3.8.1.11 CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT NOS. 1 AND 2 (TAC NOS. ME6831 AND ME6832) Dear Mr. Gellrich: By letter dated August 8, 2011 (Agencywide Documents Access and Management System Accession No. ML 11222A020), Calvert Cliffs Nuclear Power Plant, LLC proposed a license amendment to revise Technical Specification (TS) 3.8.1, <lAC Sources -Operating," for the Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 and 2. The proposed amendment would modify TS Surveillance Requirement (SR) 3.8.1.11 by revising the required power factor value to be achieved by the diesel generators during conduct of the surveillance test. The change would also modify a note associated with SR 3.8.1.11. The Nuclear Regulatory Commission staff has concluded that additional information will be required in order to continue its review. As discussed with your staff, we understand that you intend to respond to the enclosed request for additional information within 45 days of the date of this letter. Please contact me at 301-415-1364 if you have any questions. Sincerely, Ira! Douglas V. Pickett, Senior Project Manager Plant Licensing Branch 1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. and Enclosure: As stated cc w/encl: Distribution via Listserv DISTRIBUTION: PUBLIC LPLr/f RidsNrrDorlLpL 1 1 RidsNrrPMCalvertCliffs RMathew RidsNrrDeEeeb RidsOgcMailCenter RidsNrrLASLittle RidsAcrsAcnwMailCenter RidsRegion1 MailCenter GDentel, R1 VGoel, NRR GMatharu, NRR ADAMS ACCESSION NO: ML113070399 OFFICE LPL 1-1/PM LPL1-11LA EEEB/BC LPL1-1/BC NAME DPickett SUttle (ABaxter for) JAndersen by memo dated NSalgado (J8oska for)
- DATE 11/21/11 11/07/11 11/02/11 11/22/11 OFFICIAL RECORDS COPY