|
|
| (One intermediate revision by the same user not shown) |
| Line 3: |
Line 3: |
| | issue date = 03/07/2014 | | | issue date = 03/07/2014 |
| | title = Request for Additional Information Regarding Request for Changes to Technical Specification Surveillance Requirements to Increase Diesel Generator Minimum Steady State Voltage (TAC ME9607 and ME960) | | | title = Request for Additional Information Regarding Request for Changes to Technical Specification Surveillance Requirements to Increase Diesel Generator Minimum Steady State Voltage (TAC ME9607 and ME960) |
| | author name = Whited J A | | | author name = Whited J |
| | author affiliation = NRC/NRR/DORL/LPLI-2 | | | author affiliation = NRC/NRR/DORL/LPLI-2 |
| | addressee name = Rausch T S | | | addressee name = Rausch T |
| | addressee affiliation = PPL Susquehanna, LLC | | | addressee affiliation = PPL Susquehanna, LLC |
| | docket = 05000387 | | | docket = 05000387 |
| | license number = | | | license number = |
| | contact person = Whited J A, NRR/DORL, 415-4090 | | | contact person = Whited J, NRR/DORL, 415-4090 |
| | case reference number = TAC ME9607, TAC ME9608 | | | case reference number = TAC ME9607, TAC ME9608 |
| | document type = Letter, Request for Additional Information (RAI) | | | document type = Letter, Request for Additional Information (RAI) |
| Line 18: |
Line 18: |
|
| |
|
| =Text= | | =Text= |
| {{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 March 7, 2014 Mr. Timothy S. Rausch Senior Vice President and Chief Nuclear Officer PPL Susquehanna, LLC 769 Salem Boulevard Berwick, PA 18603-0467 | | {{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 March 7, 2014 Mr. Timothy S. Rausch Senior Vice President and Chief Nuclear Officer PPL Susquehanna, LLC 769 Salem Boulevard Berwick, PA 18603-0467 |
|
| |
|
| ==SUBJECT:== | | ==SUBJECT:== |
| SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2-REQUEST FOR ADDITIONAL INFORMATION REGARDING REQUEST FOR CHANGES TO TECHNICAL SPECIFICATION SURVEILLANCE REQUIREMENTS TO INCREASE DIESEL GENERATOR MINIMUM STEADY STATE VOLTAGE {TAC NOS. ME9607 AND ME9608) | | SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2- REQUEST FOR ADDITIONAL INFORMATION REGARDING REQUEST FOR CHANGES TO TECHNICAL SPECIFICATION SURVEILLANCE REQUIREMENTS TO INCREASE DIESEL GENERATOR MINIMUM STEADY STATE VOLTAGE |
| | {TAC NOS. ME9607 AND ME9608) |
|
| |
|
| ==Dear Mr. Rausch:== | | ==Dear Mr. Rausch:== |
| By letter dated September 18, 2012, as supplemented by letter dated May 10, 2013, PPL Susquehanna, LLC submitted a license amendment request for Susquehanna Steam Electric Station, Units 1 and 2, to the Nuclear Regulatory Commission (NRC) for review. The proposed amendments would change Technical Specification (TS) Surveillance Requirements 3.8.1.9, 3.8.1.11, 3.8.1.12 and 3.8.1.19 in TS 3.8.1, "AC [alternating current] Sources-Operating." Specifically, the proposed amendments would increase the Diesel Generator acceptable minimum steady state voltage when operating in emergency/isochronous mode. To complete its review, the NRC staff requests responses to the enclosed questions. | | |
| The draft questions were sent to Mr. Duane Filchner, of your staff, to ensure that the questions were understandable, the regulatory basis for the questions was clear, and to determine if the information was previously docketed. | | By letter dated September 18, 2012, as supplemented by letter dated May 10, 2013, PPL Susquehanna, LLC submitted a license amendment request for Susquehanna Steam Electric Station, Units 1 and 2, to the Nuclear Regulatory Commission (NRC) for review. The proposed amendments would change Technical Specification (TS) Surveillance Requirements 3.8.1.9, 3.8.1.11, 3.8.1.12 and 3.8.1.19 in TS 3.8.1, "AC [alternating current] Sources-Operating." |
| On February 28, 2014, Mr. Filchner agreed that you would provide a response by December 31, 2014. If you have any questions regarding this matter, please contact me at 301-415-4090. | | Specifically, the proposed amendments would increase the Diesel Generator acceptable minimum steady state voltage when operating in emergency/isochronous mode. To complete its review, the NRC staff requests responses to the enclosed questions. |
| Docket Nos. 50-387 and 50-388 | | The draft questions were sent to Mr. Duane Filchner, of your staff, to ensure that the questions were understandable, the regulatory basis for the questions was clear, and to determine if the information was previously docketed. On February 28, 2014, Mr. Filchner agreed that you would provide a response by December 31, 2014. |
| | If you have any questions regarding this matter, please contact me at 301-415-4090. |
| | Si7 Add Jeffrey~ Project Manager Plant Licensing Branch 1-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-387 and 50-388 |
|
| |
|
| ==Enclosure:== | | ==Enclosure:== |
|
| |
|
| Request for Additional Information cc w/encl: Distribution via Listserv Si7 Add Project Manager Plant Licensing Branch 1-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation REQUEST FOR ADDITIONAL INFORMATION REGARDING PROPOSED LICENSE AMENDMENT REQUEST TO CHANGE TECHNICAL SPECIFICATION SURVEILLANCE REQUIREMENTS TO INCREASE DIESEL GENERATOR MINIMUM STEADY STATE VOLTAGE SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2 DOCKET NOS. 50-387 AND 50-388 By letter dated September 18, 2012, 1 as supplemented by letter dated, May 10, 2013, 2 PPL Susquehanna, LLC (PPL, the licensee) submitted a license amendment request (LAR) for Susquehanna Steam Electric Station (SSES), Units 1 and 2, to the Nuclear Regulatory Commission (NRC) for review. The proposed amendments would change Technical Specification (TS) Surveillance Requirements (SRs) 3.8.1.9, 3.8.1.11, 3.8.1.12 and 3.8.1.19 in TS 3.8.1, "AC [alternating current] Sources-Operating." Specifically, the proposed amendments would increase the Diesel Generator (DG) acceptable minimum steady state voltage when operating in emergency/isochronous mode. The NRC staff has reviewed the information that the licensee provided in support of its proposed license amendments. | | Request for Additional Information cc w/encl: Distribution via Listserv |
| In order for the staff to complete its review, the licensee is requested to address the following requests for additional information. | | |
| | REQUEST FOR ADDITIONAL INFORMATION REGARDING PROPOSED LICENSE AMENDMENT REQUEST TO CHANGE TECHNICAL SPECIFICATION SURVEILLANCE REQUIREMENTS TO INCREASE DIESEL GENERATOR MINIMUM STEADY STATE VOLTAGE SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2 DOCKET NOS. 50-387 AND 50-388 By letter dated September 18, 2012, 1 as supplemented by letter dated, May 10, 2013, 2 PPL Susquehanna, LLC (PPL, the licensee) submitted a license amendment request (LAR) for Susquehanna Steam Electric Station (SSES), Units 1 and 2, to the Nuclear Regulatory Commission (NRC) for review. The proposed amendments would change Technical Specification (TS) Surveillance Requirements (SRs) 3.8.1.9, 3.8.1.11, 3.8.1.12 and 3.8.1.19 in TS 3.8.1, "AC [alternating current] Sources-Operating." Specifically, the proposed amendments would increase the Diesel Generator (DG) acceptable minimum steady state voltage when operating in emergency/isochronous mode. |
| | The NRC staff has reviewed the information that the licensee provided in support of its proposed license amendments. In order for the staff to complete its review, the licensee is requested to address the following requests for additional information. |
|
| |
|
| ==Background:== | | ==Background:== |
|
| |
|
| In order to be considered operable, structures, systems and components (SSCs) must be capable of performing the safety functions specified by its design, within the required range of design physical conditions, initiation times, and mission times. In addition, TS operability considerations require that SSCs meet all SRs. For operability determination purposes, the mission time is the duration of sse operation that is credited in the design-basis for the sse to perform its specified safety function. | | In order to be considered operable, structures, systems and components (SSCs) must be capable of performing the safety functions specified by its design, within the required range of design physical conditions, initiation times, and mission times. In addition, TS operability considerations require that SSCs meet all SRs. For operability determination purposes, the mission time is the duration of sse operation that is credited in the design-basis for the sse to perform its specified safety function. |
| The NRC staff considers that all SRs with specific parameters, including proper DG output voltage, demonstrate the capability of the DGs to satisfy the specified safety function, as credited in the design-basis accident conditions delineated in the Final Safety Analysis Report (FSAR). 1 Agencywide Documents Access and Management System (ADAMS) Accession No. ML 12262A322. | | The NRC staff considers that all SRs with specific parameters, including proper DG output voltage, demonstrate the capability of the DGs to satisfy the specified safety function, as credited in the design-basis accident conditions delineated in the Final Safety Analysis Report (FSAR). |
| 2 ADAMS Accession No. ML 13130A130. | | 1 Agencywide Documents Access and Management System (ADAMS) Accession No. ML12262A322. |
| Enclosure The staff has made following observations: | | 2 ADAMS Accession No. ML13130A130. |
| * The licensee's response to NRC Question 3 (RAI 3) in the submittal dated, May 10, 2013, states, in part, that: SSES DG loading calculations, in general, are based on nominal voltages.
| | Enclosure |
| * A separate license amendment request dated September 18, 2012, 3 for changing minimum allowable frequency states, in part, that: ... An SSES calculation and cable data confirms that the voltage drop between Diesel Generator E and the 4.16 k V buses is significantly higher than that for Diesel Generators A-D. The increased voltage drop corresponds with an increase in current, causing the Diesel Generator to increase power output, which causes a frequency dip.
| |
| * Calculation EC-024-1 031, attached to letter dated May 10, 2013, states, in part, that: It is appropriate to base the maximum steady state current on the DG-A through D rating rather than the higher rating of DG-E. This is because steady state loads must stay within the capability of the lower machine rating. The highest DG load shown in the FSAR diesel loading tables is in FSAR table 8.3-3 which shows a maximum steady state diesel load of 3976.85 KW (DG-A). This is close to the 4000 KW machine nominal rating. For purposes of determining the maximum steady state current, a steady state loading of 4000 KW will be used ... Requests for Additional Information (RAI): RAI 4: The licensee's response to NRC Question 1 (RAI 1) states, in part, that: ... The steady state output voltage when operating in the droop (test) mode is not being changed because when operating in the test configuration the DG output voltage is determined by the electrical power grid to which it is connected.
| |
| SR 3.8.1.3 requires each DG to be synchronized, loaded and operated 60 minutes at a 3600 kW 4000 kW. The staff concurs that this SR requires operation of the DG in droop mode and as such, verification of DG voltage is not required.
| |
| However, SRs 3.8.1. 7, 3.8.1.15 and 3.8.1.20 do not require the DG to be synchronized to the grid, but have voltage parameters to be validated.
| |
| 3 ADAMS Accession No. ML 12262A321. Explain how these SRs demonstrate the operability of the DGs when the LAR states that these parameters are non-conservative.
| |
| RAI 5: Assuming that DGs A-D are operating at the proposed allowable voltage of 4000V, provide details on the maximum DG load due to the increase in current at the lower voltage, as nominal voltage was used to calculate maximum steady state diesel load of 3976.85 KW. RAI 6: Assuming DG-E is substituting for one of the other DGs and is operating at the proposed allowable output voltage of 4000V, provide details on the maximum load that DG-E will be supplying in view of the increased current flow at a voltage below the nominal voltage. RAI 7: At the onset of an event, some pumps may be operating under run out conditions for an extended duration, imposing a higher load on the associated motors. Validate that the consequential higher loading on DG-E, when operating at 4000V, will not result in steady state voltage less than the reset setpoint of degraded voltage relays. RAI 8: Validate that the current value used in Calculation EC-024-1 031 is still bounding based on responses to RAis 5, 6 and 7 above. RAI 9: Validate that plant procedures used to perform SRs verifying DG loading capability (e.g. SR 3.8.1.3) envelope the postulated accident loading based on limiting DG voltage. RAI1 0: Validate that the consequences of the change in DG loading due to operation at 4000V has been considered for impact on other DG SRs such as fuel oil and lube oil storage requirements.
| |
| March 7, 2014 Mr. Timothy S. Rausch Senior Vice President and Chief Nuclear Officer PPL Susquehanna, LLC 769 Salem Boulevard Berwick, PA 18603-0467
| |
| | |
| ==SUBJECT:==
| |
| SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2-REQUEST FOR ADDITIONAL INFORMATION REGARDING REQUEST FOR CHANGES TO TECHNICAL SPECIFICATION SURVEILLANCE REQUIREMENTS TO INCREASE DIESEL GENERATOR MINIMUM STEADY STATE VOLTAGE (TAC NOS. ME9607 AND ME9608)
| |
|
| |
|
| ==Dear Mr. Rausch:==
| | The staff has made following observations: |
| By letter dated September 18, 2012, as supplemented by letter dated May 10, 2013, PPL Susquehanna, LLC submitted a license amendment request for Susquehanna Steam Electric Station, Units 1 and 2, to the Nuclear Regulatory Commission (NRC) for review. The proposed amendments would change Technical Specification (TS) Surveillance Requirements 3.8.1.9, 3.8.1.11, 3.8.1.12 and 3.8.1.19 in TS 3.8.1, "AC [alternating current] Sources-Operating." Specifically, the proposed amendments would increase the Diesel Generator acceptable minimum steady state voltage when operating in emergency/isochronous mode. To complete its review, the NRC staff requests responses to the enclosed questions.
| | * The licensee's response to NRC Question 3 (RAI 3) in the submittal dated, May 10, 2013, states, in part, that: |
| The draft questions were sent to Mr. Duane Filchner, of your staff, to ensure that the questions were understandable, the regulatory basis for the questions was clear, and to determine if the information was previously docketed.
| | SSES DG loading calculations, in general, are based on nominal voltages. |
| On February 28, 2014, Mr. Filchner agreed that you would provide a response by December 31, 2014. If you have any questions regarding this matter, please contact me at 301-415-4090.
| | * A separate license amendment request dated September 18, 2012, 3 for changing minimum allowable frequency states, in part, that: |
| Sincerely, IRA/ Jeffrey A. Whited, Project Manager Plant Licensing Branch 1-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-387 and 50-388
| | ... An SSES calculation and cable data confirms that the voltage drop between Diesel Generator E and the 4.16 k V buses is significantly higher than that for Diesel Generators A-D. The increased voltage drop corresponds with an increase in current, causing the Diesel Generator to increase power output, which causes a frequency dip. |
| | * Calculation EC-024-1 031, attached to letter dated May 10, 2013, states, in part, that: |
| | It is appropriate to base the maximum steady state current on the DG-A through D rating rather than the higher rating of DG-E. This is because steady state loads must stay within the capability of the lower machine rating. The highest DG load shown in the FSAR diesel loading tables is in FSAR table 8.3-3 which shows a maximum steady state diesel load of 3976.85 KW (DG-A). This is close to the 4000 KW machine nominal rating. For purposes of determining the maximum steady state current, a steady state loading of 4000 KW will be used ... |
| | Requests for Additional Information (RAI): |
| | RAI 4: The licensee's response to NRC Question 1 (RAI 1) states, in part, that: |
| | ... The steady state output voltage when operating in the droop (test) mode is not being changed because when operating in the test configuration the DG output voltage is determined by the electrical power grid to which it is connected. |
| | SR 3.8.1.3 requires each DG to be synchronized, loaded and operated for~ 60 minutes at a load~ 3600 kW and~ 4000 kW. The staff concurs that this SR requires operation of the DG in droop mode and as such, verification of DG voltage is not required. However, SRs 3.8.1. 7, 3.8.1.15 and 3.8.1.20 do not require the DG to be synchronized to the grid, but have voltage parameters to be validated. |
| | 3 ADAMS Accession No. ML12262A321. |
|
| |
|
| ==Enclosure:==
| | Explain how these SRs demonstrate the operability of the DGs when the LAR states that these parameters are non-conservative. |
| | RAI 5: Assuming that DGs A-D are operating at the proposed allowable voltage of 4000V, provide details on the maximum DG load due to the increase in current at the lower voltage, as nominal voltage was used to calculate maximum steady state diesel load of 3976.85 KW. |
| | RAI 6: Assuming DG-E is substituting for one of the other DGs and is operating at the proposed allowable output voltage of 4000V, provide details on the maximum load that DG-E will be supplying in view of the increased current flow at a voltage below the nominal voltage. |
| | RAI 7: At the onset of an event, some pumps may be operating under run out conditions for an extended duration, imposing a higher load on the associated motors. Validate that the consequential higher loading on DG-E, when operating at 4000V, will not result in steady state voltage less than the reset setpoint of degraded voltage relays. |
| | RAI 8: Validate that the current value used in Calculation EC-024-1 031 is still bounding based on responses to RAis 5, 6 and 7 above. |
| | RAI 9: Validate that plant procedures used to perform SRs verifying DG loading capability (e.g. SR 3.8.1.3) envelope the postulated accident loading based on limiting DG voltage. |
| | RAI1 0: Validate that the consequences of the change in DG loading due to operation at 4000V has been considered for impact on other DG SRs such as fuel oil and lube oil storage requirements. |
|
| |
|
| Request for Additional Information cc w/encl: Distribution via Listserv Distribution:
| | ..*ML13298A758 *via email OFFICE LPL 1-2/PM LPL 1-2/LA* DE/EEEB/BC LPL 1-2/BC LPL 1-2/PM NAME JWhited ABaxter JZimmerman MKhanna JWhited DATE 03/06/14 10/31/13 03/05/14 03/06/14 03/07/14}} |
| Public RidsRgn1 MaiiCenter Resource LPL 1-2 Reading File RidsNrrPMSusquehanna Resource RidsNrrDorllpl1-2 Resource RidsNrrLAABaxter RidsNrrDoriDpr Resource RidsAcrsAcnw_MaiiCTR Resource Rli, NRR RMathew, NRR GMatharu, NRR ADAMS Accession No *ML13298A758
| |
| .. *via email OFFICE LPL 1-2/PM LPL 1-2/LA* DE/EEEB/BC LPL 1-2/BC LPL 1-2/PM NAME JWhited A Baxter JZimmerman MKhanna JWhited DATE 03/06/14 10/31/13 03/05/14 03/06/14 03/07/14 OFFICIAL RECORD COPY}}
| |
Letter Sequence RAI |
|---|
|
|
MONTHYEARPLA-6825, Proposed Amendment No. 310 to License NPF-14 and Proposed Amendment No. 282 to License NPF-22: Change to Tech Spec SR 3.8.1.9, 3.8.1.11, 3.8.1.12, and 3.8.1.19 to Increase Diesel Generator Minimum Steady State Voltage2012-09-18018 September 2012
Proposed Amendment No. 310 to License NPF-14 and Proposed Amendment No. 282 to License NPF-22: Change to Tech Spec SR 3.8.1.9, 3.8.1.11, 3.8.1.12, and 3.8.1.19 to Increase Diesel Generator Minimum Steady State Voltage
Project stage: Request
ML12291A4992012-10-19019 October 2012
Acceptance of Requested Licensing Action Change to Technical Specification Surveillance Requirement 3.8.1.9, 3.8.1.11, 3.8.1.12, and 3.8.1.19 to Increase Diesel Generator Minimum Steady State.
Project stage: Acceptance Review
ML13043A4062013-02-12012 February 2013
Proposed Amendment No. 309 to License NPF-14 and Proposed Amendment No. 280 to License NPF-22: Change to Technical Specification Surveillance Requirement (SR) 3.8.1.9, 3.8.1.11,3.8.1.12, and 3.8.1.19 to Increase Diesel
Project stage: Other
ML13305A8912013-11-13013 November 2013
Request for Additional Information Regarding Request to Change Technical Specification 3.3.6.1
Project stage: RAI
ML13298A7582014-03-0707 March 2014
Request for Additional Information Regarding Request for Changes to Technical Specification Surveillance Requirements to Increase Diesel Generator Minimum Steady State Voltage (TAC ME9607 and ME960)
Project stage: RAI
PLA-7243, Withdrawal of Proposed Amendments for Diesel Generator Testing Use of Increased Minimum Steady State Voltage and New Frequency Tolerance2014-12-22022 December 2014
Withdrawal of Proposed Amendments for Diesel Generator Testing Use of Increased Minimum Steady State Voltage and New Frequency Tolerance
Project stage: Withdrawal
ML15027A6112015-02-0909 February 2015
Withdrawal of an Amendment Request
Project stage: Withdrawal
2013-02-12
[Table View] |
|
|---|
Category:Letter
MONTHYEARPLA-8145, Biennial 10 CFR 50.59 and 72.48 Summary Report and Changes to Regulatory Commitments - PLA-81452024-10-21021 October 2024
Biennial 10 CFR 50.59 and 72.48 Summary Report and Changes to Regulatory Commitments - PLA-8145
ML24291A1562024-10-16016 October 2024
Missed Annual Inventory Required by 40 CFR 266, Subpart in PLE 0026645
PLA-8148, Registration for the Use of Spent Fuel Storage Casks 311, 308, and 3102024-10-15015 October 2024
Registration for the Use of Spent Fuel Storage Casks 311, 308, and 310
PLA-8141, Response to Request for Additional Information Regarding Relief Request 1RR06, PLA-81412024-09-18018 September 2024
Response to Request for Additional Information Regarding Relief Request 1RR06, PLA-8141
PLA-8142, Registration for the Use of Spent Fuel Storage Casks 306, 309, and 307 - PLA-81422024-09-18018 September 2024
Registration for the Use of Spent Fuel Storage Casks 306, 309, and 307 - PLA-8142
ML24260A2312024-09-17017 September 2024
Senior Reactor and Reactor Operator Initial License Examinations
05000387/LER-2024-002, B Diesel Generator Inoperable Due to Failed Excitation System Linear Reactor2024-09-16016 September 2024
B Diesel Generator Inoperable Due to Failed Excitation System Linear Reactor
ML24255A8642024-09-0606 September 2024
Rscc Wire & Cable LLC Dba Marmon Industrial Energy & Infrastructure - Part 21 Retraction of Final Notification
ML24249A1362024-09-0404 September 2024
EN 57304 - Westinghouse Electric Company, LLC, Final Report - No Embedded Files. Notification of the Potential Existence of Defects Pursuant to 10 CFR Part 21
ML24233A2192024-09-0303 September 2024
– Authorized Alternative to Requirements of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code
IR 05000387/20240052024-08-29029 August 2024
Updated Inspection Plan for Susquehanna Steam Electric Station, Units 1 and 2 (Report 05000387/2024005 and 05000388/2024005)
05000387/LER-2023-004-01, Manual Reactor Scram Due to Degraded Main Condenser Vacuum2024-08-26026 August 2024
Manual Reactor Scram Due to Degraded Main Condenser Vacuum
05000387/LER-2024-001-01, Main Steam Isolation Valve Leakage Due to Valve Body Seat Wear2024-08-21021 August 2024
Main Steam Isolation Valve Leakage Due to Valve Body Seat Wear
IR 05000387/20240022024-08-12012 August 2024
Integrated Inspection Report 05000387/2024002 and 05000388/2024002
ML24208A0962024-07-25025 July 2024
57243-EN 57243 - Rssc Wire & Cable LLC, Dba Marmon - Part 21 Notification
PLA-8117, 23rd Refueling Outage Owners Activity Report (PLA-8117)2024-07-23023 July 2024
23rd Refueling Outage Owners Activity Report (PLA-8117)
ML24197A0982024-07-15015 July 2024
Request for Information for a Biennial Problem Identification and Resolution Inspection; Inspection Report 05000387/2024010 and 05000388/2024010
ML24127A2262024-05-29029 May 2024
Issuance of Amendment Nos. 288 and 272 Adoption of TSTF-563
PLA-8126, Response to Request for Confirmation of Information Regarding Relief Request 1RR062024-05-29029 May 2024
Response to Request for Confirmation of Information Regarding Relief Request 1RR06
PLA-8122, Annual Radiological Environmental Operating Report (PLA-8122)2024-05-28028 May 2024
Annual Radiological Environmental Operating Report (PLA-8122)
PLA-8123, Main Steam Isolation Valve Leakage2024-05-23023 May 2024
Main Steam Isolation Valve Leakage
PLA-8115, Relief Request IRR06 One Time Extension to the Fourth 10-Year Inservice Testing Program Interval (PLA-8115)2024-05-23023 May 2024
Relief Request IRR06 One Time Extension to the Fourth 10-Year Inservice Testing Program Interval (PLA-8115)
IR 05000387/20240012024-05-13013 May 2024
Integrated Inspection Report 05000387/2024001 and 05000388/2024001
IR 05000387/20244042024-05-0707 May 2024
Information Request for the Cybersecurity Baseline Inspection, Notification to Perform Inspection 05000387/2024404 and 05000388/2024404
ML24082A1372024-04-22022 April 2024
Issuance of Amendment Nos. 287 and 271 Adoption of TSTF-568, Revision 2 and Associated Technical Specification Changes
PLA-8094, Radioactive Effluent Release Report and Offsite Dose Calculation Manual PLA-80942024-04-22022 April 2024
Radioactive Effluent Release Report and Offsite Dose Calculation Manual PLA-8094
PLA-8095, 2023 Annual Radiological Environmental Operating Report (PLA-8095)2024-04-22022 April 2024
2023 Annual Radiological Environmental Operating Report (PLA-8095)
PLA-8101, Re 2023 Annual Report of Radiation Exposure2024-04-22022 April 2024
Re 2023 Annual Report of Radiation Exposure
PLA-8102, Annual Environmental Operating Report (Nonradiological) PLA-81022024-04-11011 April 2024
Annual Environmental Operating Report (Nonradiological) PLA-8102
PLA-8113, Response to Request for Additional Information Regarding Relief Request 4RR-11 (PLA-8113)2024-04-11011 April 2024
Response to Request for Additional Information Regarding Relief Request 4RR-11 (PLA-8113)
PLA-8112, Relief Request 4RR-11 Relief from End of Interval Boundary Leakage Test PLA-81122024-04-0909 April 2024
Relief Request 4RR-11 Relief from End of Interval Boundary Leakage Test PLA-8112
PLA-8110, Submittal of Unit 1 Cycle 24 Core Operating License Report (Pla 8110)2024-04-0404 April 2024
Submittal of Unit 1 Cycle 24 Core Operating License Report (Pla 8110)
PLA-8100, Property Insurance Program (PLA-8100)2024-04-0101 April 2024
Property Insurance Program (PLA-8100)
ML24092A4022024-04-0101 April 2024
Annual Financial Report (PLA-8098)
PLA-8109, Supplement to Request for Exemption from Certain Requirements of 10 CR 72.212 and 10 CFR 72.214 Resulting from Fuel Basket Design Control Compliance (PLA-8109)2024-03-21021 March 2024
Supplement to Request for Exemption from Certain Requirements of 10 CR 72.212 and 10 CFR 72.214 Resulting from Fuel Basket Design Control Compliance (PLA-8109)
ML24067A2512024-03-19019 March 2024
Authorized Alternative to Requirements of the ASME Code
PLA-8107, Request for Exemption from Certain Requirements of 10 CFR 72.212 and 10 CFR 72.214 Resulting from Fuel Basket Design Control Compliance2024-03-19019 March 2024
Request for Exemption from Certain Requirements of 10 CFR 72.212 and 10 CFR 72.214 Resulting from Fuel Basket Design Control Compliance
ML24044A2532024-03-14014 March 2024
Associated Independent Spent Fuel Storage Installation – Exemption from Select Requirements of 10 CFR Part 73 (EPID L-2023-LLE-0077 (Security Notifications, Reports, and Recordkeeping & Suspicious Activity Reporting))
IR 05000387/20240112024-02-29029 February 2024
Commercial Grade Dedication Inspection Report 05000387/2024011 and 05000388/2024011
IR 05000387/20230062024-02-28028 February 2024
Annual Assessment Letter for Susquehanna Steam Electric Station, Units 1 and 2 (Reports 05000387/2023006 and 05000388/2023006)
ML24039A1882024-02-27027 February 2024
Issuance of Amendment Nos. 286 and 270 Changes to Technical Specifications for Control Rods
ML24037A3072024-02-22022 February 2024
Summary of Regulatory Audit in Support of Relief Request 5RR-02
PLA-8099, Proof of Financial Protection and Guarantee of Payment of Deferred Premiums (PLA-8099)2024-02-13013 February 2024
Proof of Financial Protection and Guarantee of Payment of Deferred Premiums (PLA-8099)
IR 05000387/20230042024-02-0707 February 2024
Integrated Inspection Report 05000387/2023004 and 05000388/2023004
PLA-8096, Response to Request for Additional Information Regarding Proposed Relief Request for the Fifth 10-Year Inservice Test Program Interval2024-01-0404 January 2024
Response to Request for Additional Information Regarding Proposed Relief Request for the Fifth 10-Year Inservice Test Program Interval
PLA-8077, Emergency Plan Revision 67 (PLA-8077)2023-12-27027 December 2023
Emergency Plan Revision 67 (PLA-8077)
IR 05000387/20230102023-12-11011 December 2023
Fire Protection Team Inspection Report 05000387/2023010 and 05000388/2023010
PLA-8088, Request for Exemption from Enhanced Weapons, Firearms Background Checks and Security Event Notifications Implementation (PLA-8088)2023-12-0505 December 2023
Request for Exemption from Enhanced Weapons, Firearms Background Checks and Security Event Notifications Implementation (PLA-8088)
PLA-8089, Submittal of Revision to Inservice Testing Program Plan2023-12-0505 December 2023
Submittal of Revision to Inservice Testing Program Plan
PLA-8084, Application to Revise Technical Specifications to Adopt TSTF-568, Revise Applicability of BWR TS 3.6.2.5 and TS 3.6.3.22023-11-29029 November 2023
Application to Revise Technical Specifications to Adopt TSTF-568, Revise Applicability of BWR TS 3.6.2.5 and TS 3.6.3.2
2024-09-06
[Table view]
Category:Request for Additional Information (RAI)
MONTHYEARML24150A3362024-05-29029 May 2024
Request for Confirmation of Information Relief Request 1RR06 (Proposed Alternative) Susquehanna Nuclear, LLC Susquehanna Steam Electric Station (Susquehanna), Unit 1 Docket No. 50-387
IR 05000387/20244042024-05-0707 May 2024
Information Request for the Cybersecurity Baseline Inspection, Notification to Perform Inspection 05000387/2024404 and 05000388/2024404
ML24102A1252024-04-10010 April 2024
Request for Additional Information for Susquehanna, Unit 1 Alternative Request 4RR-11
ML23334A1502023-11-30030 November 2023
NRC Request for Additional Information Re. Susquehanna Relief Request RR-02
ML23277A0412023-10-0505 October 2023
Notification of Commercial Grade Dedication Inspection (05000387/2024011 and 05000388/2024011) and Request for Information
ML23013A2082023-01-13013 January 2023
Request for Additional Information
ML22146A1022022-05-26026 May 2022
Information Request for the Cyber Security Baseline Inspection, Notification to Perform Inspection 05000387/2022404 and 05000388/2022404
ML22146A0742022-05-25025 May 2022
NRR E-mail Capture - NRC Request for Additional Information - Susquehanna License Amendment Request
ML22111A3132022-04-21021 April 2022
NRR E-mail Capture - NRC Request for Additional Information - Susquehanna License Amendment Request
ML22041A1562022-02-10010 February 2022
Information Request for a Triennial Baseline Design Bases Assurance Inspection (Team); Inspection Report 05000387/2022013 and 05000388/2022013
ML21316A1242021-11-18018 November 2021
Supplemental Information Needed for Acceptance of Requested Licensing Action Regarding Emergency Core Cooling Technical Specifications
ML20056E4392020-02-21021 February 2020
Ti 2515/194 Inspection Documentation Request
ML20010D2012020-01-0909 January 2020
Request for Additional Information Related to Request to Allow Application of Framatome Analysis Methodologies Necessary to Support a Planned Transition to Atrium 11 Fuel Under Maximum
ML19319A0092019-11-14014 November 2019
NRR E-mail Capture - Draft RAI for SSES Units 1 and 2 LAR to Replace ESW Piping
ML19319B1922019-11-14014 November 2019
NRR E-mail Capture - RAI for Susquehanna, 1 and 2 License Amendment Request - Replace the Emergency Service Water System and Residual Heat Removal Service Water System
ML19128A0232019-05-0707 May 2019
Request for Additional Information: Susquehanna Steam Electric Station, Units 1 and 2 License Amendment Request for ESW Piping Replacement
ML18352B1832018-12-13013 December 2018
Enclosurequest for Additional Information (Letter to K. Cimorelli Request for Additional Information Regarding Susquehanna Nuclear, Llc'S Decommissioning Funding Plan Update for Susquehanna Steam Electric Station Independent Spent Fuel Stor
ML17180A2002017-07-0707 July 2017
Request for Additional Information Regarding License Amendment Request to Revise Diesel Generator Surveillance Requirements with New Steady State Voltage and Frequency Limits
ML17059D2142017-03-0606 March 2017
Susquehanna Steam Electric Station - Supplemental Information Needed for Acceptance of Requested Licensing Action Re: License Amendment Request to Revise Diesel Generator Surveillance Requirements with New Steady State Voltage Frequency Limits
ML16251A0652016-09-0909 September 2016
Susquehanna Steam Electric Station, Unit 2 - RAI Regarding Temporary Change of Unit 2, Technical Specifications 3.7.1 & 3.8.7 to Allow Replacement of Unit 1, 480 Volt Engineered Safeguard System Load Center Transformers(CAC No. MF7298)
ML16245A2052016-09-0101 September 2016
Draft Request for Additional Information Replacement of Load Center Transformers
ML16243A0952016-08-30030 August 2016
Draft Request for Additional Information Application for Approval of Indirect Transfer of Control of Licenses
ML16060A2302016-03-24024 March 2016
Acceptance of Requested Licensing Action License Amendment Request for Temporary Change of Unit 2 Technical Specifications 3.71 and 3.87 to Allow Replacement of Unit 1 480V Ess Load Center Transformers
ML15316A5632015-11-13013 November 2015
Request for Additional Information Regarding Proposed Relief Requests for the Third 10-Year Inservice Inspection Interval(Cac Nos. MF6302 Through MF6307)
ML15292A1782015-10-15015 October 2015
TSTF-425 LAR Draft 3rd RAIs
ML15230A0802015-08-26026 August 2015
Request for Additional Information Regarding License Amendment Request to Adopt NEI 99-01, Revision 6, EAL Scheme Change
ML15209A9742015-08-24024 August 2015
Request for Additional Information License Amendment Request to Adopt Technical Specifications Task Force Traveler (TSTF)-425
ML15230A0462015-08-17017 August 2015
Draft RAIs SSES EAL Scheme Change LAR in Accordance with NEI 99-01 Rev 6
ML15229A2092015-08-17017 August 2015
SSES Draft Request for Additional Information Licensee Request to Adopt TSTF-425
ML15229A2002015-08-17017 August 2015
E-mail from J. Whited to J. Jennings SSES Draft TSTF-425 RAIs
ML15183A3502015-07-0202 July 2015
SSES Relief Requests 3RR-19, 3RR-20, and 3RR-21 Draft Identified Information Insufficiencies (TAC Nos. MF6302 Through MF6307)
ML15103A3962015-05-22022 May 2015
Request for Additional Information License Amendment Request to Adopt Technical Specifications Task Force Traveler (TSTF)-425 (TAC Nos. MF5151 and MF5152)
ML15128A5092015-05-0808 May 2015
E-mail from J. Whited to D. Filchner SSES Draft Request for Additional Information LAR for Implementation of TSTF-425
ML15128A5162015-05-0808 May 2015
SSES Draft Request for Additional Information LAR for Implementation of TSTF-425
ML15008A4702015-01-30030 January 2015
Request for Additional Information Request to Revise Technical Specification 3.4.10, RCS Pressure and Temperature (P/T) Limits.
ML15016A2742015-01-16016 January 2015
Draft RAIs License Amendment Request for Change to TS 3.4.10 P/T Limits (TAC Nos. MF4597 and MF45980)
ML15016A2722015-01-16016 January 2015
E-mail from J. Whited to D. Filchner Draft RAIs License Amendment Request for Change to TS 3.4.10 P/T Limits (TAC Nos. MF4597 and MF45980)
ML14343A9842015-01-0808 January 2015
Request for Additional Information Relief Request 4RR-01
ML14345A2412014-12-16016 December 2014
Request for Additional Information Request for Order Approving Indirect Transfer of Control and Conforming License Amendments
ML14346A4022014-12-12012 December 2014
Draft RAIs Relief Request 4RR-01
ML14346A4012014-12-12012 December 2014
E-mail from J. Whited to D. Filchner Susquehanna Steam Electric Station Draft RAIs Relief Request 4RR-01
ML14346A1022014-12-12012 December 2014
Draft License Transfer Revised 2nd RAIs
ML14346A1002014-12-12012 December 2014
E-mail from J. Whited to R. Sgarro Susquehanna Steam Electric Station Draft License Transfer Revised 2nd RAIs
ML14342A8132014-12-0808 December 2014
SSES Units 1 and 2 Draft RAIs Application for Approval of Indirect Transfer of Control of Licenses
ML14342A8082014-12-0808 December 2014
E-mail from J. Whited to R. Sgarro (PPL) SSES Units 1 and 2 Draft RAIs Application for Approval of Indirect Transfer of Control of Licenses
ML14233A2772014-08-27027 August 2014
Request for Additional Information License Amendment Request to Change the Low Pressure Safety Limit
ML14233A3392014-08-21021 August 2014
Draft RAIs for Susquehanna Steam Electric Station Units 1 and 2 License Amendment Request for Changes to the Low Pressure Safety Limits
ML13298A7582014-03-0707 March 2014
Request for Additional Information Regarding Request for Changes to Technical Specification Surveillance Requirements to Increase Diesel Generator Minimum Steady State Voltage (TAC ME9607 and ME960)
ML13298A7812014-03-0707 March 2014
Request for Additional Information Regarding Request for Changes to Technical Specification Surveillance Requirement 3.8.1.19 to Increase Diesel Generator Minimum Steady State Frequency (TACs ME9609.
ML14013A1502014-01-31031 January 2014
Request for Additional Information Regarding Relief Requests for the Fourth 10-Year Inservice Testing Interval
2024-05-07
[Table view] |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 March 7, 2014 Mr. Timothy S. Rausch Senior Vice President and Chief Nuclear Officer PPL Susquehanna, LLC 769 Salem Boulevard Berwick, PA 18603-0467
SUBJECT:
SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2- REQUEST FOR ADDITIONAL INFORMATION REGARDING REQUEST FOR CHANGES TO TECHNICAL SPECIFICATION SURVEILLANCE REQUIREMENTS TO INCREASE DIESEL GENERATOR MINIMUM STEADY STATE VOLTAGE
{TAC NOS. ME9607 AND ME9608)
Dear Mr. Rausch:
By letter dated September 18, 2012, as supplemented by letter dated May 10, 2013, PPL Susquehanna, LLC submitted a license amendment request for Susquehanna Steam Electric Station, Units 1 and 2, to the Nuclear Regulatory Commission (NRC) for review. The proposed amendments would change Technical Specification (TS) Surveillance Requirements 3.8.1.9, 3.8.1.11, 3.8.1.12 and 3.8.1.19 in TS 3.8.1, "AC [alternating current] Sources-Operating."
Specifically, the proposed amendments would increase the Diesel Generator acceptable minimum steady state voltage when operating in emergency/isochronous mode. To complete its review, the NRC staff requests responses to the enclosed questions.
The draft questions were sent to Mr. Duane Filchner, of your staff, to ensure that the questions were understandable, the regulatory basis for the questions was clear, and to determine if the information was previously docketed. On February 28, 2014, Mr. Filchner agreed that you would provide a response by December 31, 2014.
If you have any questions regarding this matter, please contact me at 301-415-4090.
Si7 Add Jeffrey~ Project Manager Plant Licensing Branch 1-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-387 and 50-388
Enclosure:
Request for Additional Information cc w/encl: Distribution via Listserv
REQUEST FOR ADDITIONAL INFORMATION REGARDING PROPOSED LICENSE AMENDMENT REQUEST TO CHANGE TECHNICAL SPECIFICATION SURVEILLANCE REQUIREMENTS TO INCREASE DIESEL GENERATOR MINIMUM STEADY STATE VOLTAGE SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2 DOCKET NOS. 50-387 AND 50-388 By letter dated September 18, 2012, 1 as supplemented by letter dated, May 10, 2013, 2 PPL Susquehanna, LLC (PPL, the licensee) submitted a license amendment request (LAR) for Susquehanna Steam Electric Station (SSES), Units 1 and 2, to the Nuclear Regulatory Commission (NRC) for review. The proposed amendments would change Technical Specification (TS) Surveillance Requirements (SRs) 3.8.1.9, 3.8.1.11, 3.8.1.12 and 3.8.1.19 in TS 3.8.1, "AC [alternating current] Sources-Operating." Specifically, the proposed amendments would increase the Diesel Generator (DG) acceptable minimum steady state voltage when operating in emergency/isochronous mode.
The NRC staff has reviewed the information that the licensee provided in support of its proposed license amendments. In order for the staff to complete its review, the licensee is requested to address the following requests for additional information.
Background:
In order to be considered operable, structures, systems and components (SSCs) must be capable of performing the safety functions specified by its design, within the required range of design physical conditions, initiation times, and mission times. In addition, TS operability considerations require that SSCs meet all SRs. For operability determination purposes, the mission time is the duration of sse operation that is credited in the design-basis for the sse to perform its specified safety function.
The NRC staff considers that all SRs with specific parameters, including proper DG output voltage, demonstrate the capability of the DGs to satisfy the specified safety function, as credited in the design-basis accident conditions delineated in the Final Safety Analysis Report (FSAR).
1 Agencywide Documents Access and Management System (ADAMS) Accession No. ML12262A322.
2 ADAMS Accession No. ML13130A130.
Enclosure
The staff has made following observations:
- The licensee's response to NRC Question 3 (RAI 3) in the submittal dated, May 10, 2013, states, in part, that:
SSES DG loading calculations, in general, are based on nominal voltages.
- A separate license amendment request dated September 18, 2012, 3 for changing minimum allowable frequency states, in part, that:
... An SSES calculation and cable data confirms that the voltage drop between Diesel Generator E and the 4.16 k V buses is significantly higher than that for Diesel Generators A-D. The increased voltage drop corresponds with an increase in current, causing the Diesel Generator to increase power output, which causes a frequency dip.
- Calculation EC-024-1 031, attached to letter dated May 10, 2013, states, in part, that:
It is appropriate to base the maximum steady state current on the DG-A through D rating rather than the higher rating of DG-E. This is because steady state loads must stay within the capability of the lower machine rating. The highest DG load shown in the FSAR diesel loading tables is in FSAR table 8.3-3 which shows a maximum steady state diesel load of 3976.85 KW (DG-A). This is close to the 4000 KW machine nominal rating. For purposes of determining the maximum steady state current, a steady state loading of 4000 KW will be used ...
Requests for Additional Information (RAI):
RAI 4: The licensee's response to NRC Question 1 (RAI 1) states, in part, that:
... The steady state output voltage when operating in the droop (test) mode is not being changed because when operating in the test configuration the DG output voltage is determined by the electrical power grid to which it is connected.
SR 3.8.1.3 requires each DG to be synchronized, loaded and operated for~ 60 minutes at a load~ 3600 kW and~ 4000 kW. The staff concurs that this SR requires operation of the DG in droop mode and as such, verification of DG voltage is not required. However, SRs 3.8.1. 7, 3.8.1.15 and 3.8.1.20 do not require the DG to be synchronized to the grid, but have voltage parameters to be validated.
3 ADAMS Accession No. ML12262A321.
Explain how these SRs demonstrate the operability of the DGs when the LAR states that these parameters are non-conservative.
RAI 5: Assuming that DGs A-D are operating at the proposed allowable voltage of 4000V, provide details on the maximum DG load due to the increase in current at the lower voltage, as nominal voltage was used to calculate maximum steady state diesel load of 3976.85 KW.
RAI 6: Assuming DG-E is substituting for one of the other DGs and is operating at the proposed allowable output voltage of 4000V, provide details on the maximum load that DG-E will be supplying in view of the increased current flow at a voltage below the nominal voltage.
RAI 7: At the onset of an event, some pumps may be operating under run out conditions for an extended duration, imposing a higher load on the associated motors. Validate that the consequential higher loading on DG-E, when operating at 4000V, will not result in steady state voltage less than the reset setpoint of degraded voltage relays.
RAI 8: Validate that the current value used in Calculation EC-024-1 031 is still bounding based on responses to RAis 5, 6 and 7 above.
RAI 9: Validate that plant procedures used to perform SRs verifying DG loading capability (e.g. SR 3.8.1.3) envelope the postulated accident loading based on limiting DG voltage.
RAI1 0: Validate that the consequences of the change in DG loading due to operation at 4000V has been considered for impact on other DG SRs such as fuel oil and lube oil storage requirements.
..*ML13298A758 *via email OFFICE LPL 1-2/PM LPL 1-2/LA* DE/EEEB/BC LPL 1-2/BC LPL 1-2/PM NAME JWhited ABaxter JZimmerman MKhanna JWhited DATE 03/06/14 10/31/13 03/05/14 03/06/14 03/07/14
