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MONTHYEARML0205901602002-03-0505 March 2002 Memo to File Re Request for Additional Information Faxed to the Licensee Residual Heat Removal Service Water System and Ultimate Heat Sink Technical Specifications Modifications (TAC MB2119 and TAC MB2120) Project stage: RAI ML0206100032002-03-19019 March 2002 Request for Additional Information Residual Heat Removal Service Water System and Ultimate Heat Sink Technical Specifications Modifications (TAC Nos. MB2119 and MB2120) Project stage: RAI ML0219802582002-07-17017 July 2002 Safety Evaluation Input for Proposed Changes to the Susquehanna, Units 1 & 2 Technical Specifications Implementing Operability Requirements for the Ultimate Heat Sink Spray Valves (TAC Nos. MB2119 & MB2120) Project stage: Approval ML0300201132002-12-30030 December 2002 Technical Specifications Pages TS/37.7-1 - TS/3.7-3, TS/3.7-3a - TS/3.7-3b for Amendment 206, Susquehanna, Units 1 & Pages TS/3.7-1 - TS/3.7-3, TS/3.73a - TS/3.7-3b, for Amendment 180 Susquehanna, Units 2 Project stage: Other ML0236500342002-12-30030 December 2002 Issuance of Amendment Nos. 206 & 180, Revising TS 3.7.1 to Add Operability Requirement & Surveillance Requirements for the Ultimate Heat Sink Spray Bypass & Large Valves. TACs MB2119 and MB2120 Project stage: Approval 2002-03-19
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Category:Memoranda
MONTHYEARML23094A1252023-03-31031 March 2023 Talen Part 21 Final Notification P21-03032023-FN R0 Re Defect Identified in Automatic Transfer Switch ML22034A3932022-02-16016 February 2022 Calendar Year 2021 Security Baseline Completion Memo ML21054A3032021-04-22022 April 2021 Memo to File: Final Ea/Fonsi of Independent Spent Fuel Storage Facilities Decommissioning Funding Plans Related to Susquehanna ML17090A1332017-04-0505 April 2017 Notice of Meeting with Susquehanna Nuclear, LLC to Discuss the Nrc'S Assessment of Safety Performance at Susquehanna Steam Electric Station for 2016 ML17037B8502017-02-0606 February 2017 08/21/1975 Notice of Meeting with Architect Engineers of Mark II Owners to Discuss Load Combinations and Analytical Techniques for Determining Stresses in Mechanical Components and Structures of Mark II Containments ML16088A2042016-03-28028 March 2016 Memo T Bowers from s Ruffin, Technical Assistance Requests - Review 2015 Tri-Annual Decommissioning Funding Plans for Multiple Independent Spent Fuel Storage Installations W/ Encl 2 (Template) ML16088A2052016-03-28028 March 2016 Enclosure 1 - (72.30 DFP Reviews to Be Completed 2015) - Memo T Bowers from s Ruffin, Technial Assistance Requests - Review 2015 Tri-Annual Decommissioning Funding Plans for Multiple Independent Spent Fuel Storage Installations ML15345A0912015-12-17017 December 2015 Closure of Issue Found During 2014 Regulatory Commitment Audit ML15313A2392015-11-0606 November 2015 Request for Additional Information Proposed Relief Requests for the Third 10-Year Inservice Inspection Interval (TAC Nos. MF6302 Through MF6307) ML15093A3052015-04-0303 April 2015 Memorandum to the Participants NRC Staff Notification of Proposed Issuance of Order and Conforming License Amendments Approving Indirect Transfer ML14133A0592014-07-0101 July 2014 Summary of Closed Meeting Between Representatives of the Army Corps of Engineers, Nuclear Regulatory Commission, Federal Energy Regulatory Commission, Exelon Generation Co, LLC, and PPL Susquehanna, LLC, to Discuss Dam Failure Analysis.. ML14085A4112014-05-0606 May 2014 Final TIA Response Susquehanna SGTS and Secondary Ventilation ML14112A2392014-04-22022 April 2014 Notice of Forthcoming Closed Meeting to Discuss Dam Failure Analysis for Peach Bottom Atomic Power Station Units 2 and 3, Susquehanna Steam Electric Station Units 1 and 2, and Three Mile Island Nuclear Station Unit 1 ML13309A0802013-12-11011 December 2013 Memorandum to File: Transcript for 10 CFR 2.206 Petition from Beyond Nuclear (Et Al) Regarding General Electric Mark I and Mark II Boiling-Water Reactors 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 ML13035A2482013-02-0101 February 2013 ME9609 Susquehanna Steam Electric Station Proposed Amendment No. 309 to License NPF-14 and Proposed Amendment No. 280 to License Npf -22: Change to Technical Specification Surveillance Requirement 3.8.1.19 to Increase Diesel Generator E Min ML1114410162011-05-24024 May 2011 Summary of Susquehanna Annual Assessment Meeting, May 19, 2011 ML1014700962010-05-25025 May 2010 Summary of Annual Assessment Meeting with PPL Susquehanna, LLC, to Discuss Nrc'S Assessment of Safety Performance for Calendar Year 2009 ML0925103122009-09-0808 September 2009 Drop-in Visit from PPL Susquehanna, LLC - August 31, 2009 ML0919404402009-07-13013 July 2009 Meeting Summary, Public Meeting with PPL Susquehanna, LLC Re SCWE at Site ML0915505712009-06-0101 June 2009 Meeting Minutes of the Plant License Renewal Subcommittee on April 1, 2009 ML0900803792009-01-30030 January 2009 Summary of Telephone Conference Call Held on 12/18/08, Between the U.S. NRC and PPL Susquehanna, LLC, Concerning TLAA RAI ML0833101132008-12-0303 December 2008 Meeting Summary, Telephone Conference Call Between U.S. NRC and PPL Susquehanna, LLC, Concerning the Draft Request for Additional Information Pertaining to the Susquehanna Steam Electric Station Units 1 & 2, LRA ML0832307862008-11-19019 November 2008 11/13/2008-Summary of Telephone Conference Call Between NRC and PPL, Concerning the Responses to RAIs Pertaining to the Susquehanna Steam Electric Station, Units 1 and 2, License Renewal Application ML0828901522008-10-21021 October 2008 Summary of Telephone Conference Call Held on October 8, 2008, Between the USNRC and PPL Susquehanna, Llc. Concerning Draft Requests for Additional Information Pertaining to the, License Renewal Application ML0822603532008-10-0101 October 2008 06/25/2008 Meeting Summary, Telephone Conference Call Between the NRC and PPL Susquehanna, LLC, Concerning Draft Request for Additional Information Pertaining to the Susquehanna, Units 1 and 2, License Renewal Application ML0807400842008-03-14014 March 2008 Draft Regulatory Guide for Comment ML0806303822008-03-0505 March 2008 Notice of Meeting with PPL Susquehanna, LLC (PPL) to Discuss Ppl'S Plan Regarding Compliance with the License Conditions Related to the New Steam Dryer During Extended Power Uprate Power Ascension for the Upcoming Refueling Outage ML0728800512007-12-13013 December 2007 Summary of Telephone Conference Call Held on 10/03/07, Between the U.S. Nuclear Regulatory Commission and PPL Susquehanna, LLC, Concerning Fire ML0728511102007-11-16016 November 2007 Summary of Telephone Conference Call Held on October 3, 2007, Between the U.S. Nuclear Regulatory Commission and PPL Susquehanna, LLC Concerning Open Items Pertaining to the Susquehanna, Units 1 and 2, License Renewal Application ML0730200012007-10-25025 October 2007 FRN - Power Uprates (Susquehanna), November 14, 2007 ML0726401342007-10-24024 October 2007 Summary of Telephone Conference Call with PPL Susquehanna, LLC Concerning Requests for Additional Information ML0728906522007-10-24024 October 2007 Summary of July 19th Conference Call Between NRC DLR Environmental Staff; PPL Susquehanna, LLC; and PPL Generating Regarding PPL Generation'S Letter of Intent to File a Combined License Application for a Potential New Unit at the SSES Site ML0724900462007-09-18018 September 2007 and 09/05/2007 Summary of Telephone Conference Calls Between the U.S. Nuclear Regulatory Commission and PPL Susquehanna, LLC, Concerning D-RAI ML0723304142007-08-27027 August 2007 Summary of Telephone Conference Call Held on August 16, 2007, Between the Us NRC and PPL Susquehanna, Concerning Request for Additional Information Pertaining to the Susquehanna, Units 1 and 2, License Renewal Application ML0721101752007-07-30030 July 2007 Notice of Meeting with PPL Susquehanna, LLC (Ppl), Susquehanna Steam Electric Station, Units 1 and 2, to Conduct a Working Level-Discussion Related to NRC Staff'S Reactor Systems Safety Review of Proposed Extended Power Uprate Application ML0716400652007-06-14014 June 2007 Notice of with PPL Susquehanna, LLC (Ppl), Susquehanna, Units 1 and 2 to Conduct a Working Level-Discussion Related to the Steam Dryer Instrumentation Plan Finite Element Analysis Model Changes, Fabrication Improvements and Start-Up Limit. ML0705800922007-03-0202 March 2007 Summary of Telephone Conference Call Held on February 12, 2007, Between the U.S. Nuclear Regulatory Commission and PPL Susquehanna, Lcc, Concerning Requests for Additional Information Pertaining to the Susquehanna Steam Electric Station, Un ML0629104092006-11-0909 November 2006 Review of Susquehanna Steam Electric Station Units 1 and 2 Amendment Request to Revise Technical Specifications 3.8.1 ML0624202762006-08-30030 August 2006 09/13/2006 Notice of Forthcoming Meeting with PPL Susquehanna, LLC (PPL) Susquehanna Steam Electric Station, Units 1 and 2 (SSES 1 and 2) on Pre-License Renewal Application ML0608107012006-03-22022 March 2006 04/05/06 - Forthcoming Meeting with PPL Susquehanna, LLC (Ppl), Susquehanna Steam Electric Station, Units 1 and 2 (SSES 1 and 2) on License Renewal and Extended Power Uprate ML0530704902005-11-0303 November 2005 Forthcoming Meeting with PPL Susquehanna, LLC (Ppl), Susquehanna, Units 1 and 2 to Conduct a Working level-discussion Related to the Schedule, Approach, and Strategy for the Proposed Extended Power Uprate Application.. ML0527103892005-09-29029 September 2005 Meeting with PPL Susquehanna 1 & 2, Schedule, Approach and Strategy for the SSES Unit 1 Cycle 14 and Cycle 15 Minimum Critical Power Ratio Safety Limit Submittals in Light of the Control Cell Friction Issues Experienced on Unit 1 ML0510804732005-04-29029 April 2005 Correction to Letter Approving the Use of the Privatel Model 960V Validated to Federal Information Processing Standard (Fips) 140-1 ML0403001132004-01-30030 January 2004 Correction of License Authority Files ML0235404372002-12-18018 December 2002 Rquest for Additonal Information (RAI) for Emergency Plan (E-Plan) Revisions PLA-5567 - Attachment ML0235200602002-12-18018 December 2002 Draft Request for Additional Information (RAI) Response Regarding Amendment Request for Emergency Plan (E-Plan) Revisions ML0229705292002-10-24024 October 2002 Results of the Susquehanna Steam Electric Station Units 1 and 2 SDP Phase 2 Notebook Benchmarking Visit ML0226002922002-09-17017 September 2002 Memorandum Regarding Report on the Status of Open TIAs Assigned to NRR ML0219802582002-07-17017 July 2002 Safety Evaluation Input for Proposed Changes to the Susquehanna, Units 1 & 2 Technical Specifications Implementing Operability Requirements for the Ultimate Heat Sink Spray Valves (TAC Nos. MB2119 & MB2120) 2023-03-31
[Table view] Category:Safety Evaluation
MONTHYEARML23257A1222023-09-19019 September 2023 Authorization and Safety Evaluation for Alternative Request for Valve 251130 ML23207A1762023-08-0101 August 2023 Authorization and Safety Evaluation for Relief Request 4RR-10 ML23073A0822023-03-30030 March 2023 Enclosure 2 - Draft Conforming Amendments - Susquehanna Steam Electric Station, Units 1 & 2 & Associated Independent Spent Fuel Storage Installation- Order Approving Indirect Transfer of Licenses & Draft Conforming License Amendments EPID L ML23073A1072023-03-30030 March 2023 Enclosure 4 - Safety Evaluation Nonproprietary Susquehanna Steam Electric Station,Units 1,2 & Associated Independent Spent Fuel Storage Installation-Order Approving Indirect Transfer of Licenses & Draft Conforming License Amendments EPID L- ML23010A1082023-01-15015 January 2023 Issuance of Amendment No. 268 Change to Control Rod Technical Specifications ML22294A1502022-11-17017 November 2022 Issuance of Amendment Nos. 284 and 267 Relocating Technical Specification Unit Staff Qualification Requirements to Quality Assurance Program ML22256A0542022-10-28028 October 2022 Issuance of Amendment Nos. 283 and 266 Change to Reactor Steam Dome Pressure--Low Instrument Function Allowable Value in Technical Specifications ML22200A0622022-08-30030 August 2022 Issuance of Amendment Nos. 282 and 265 Regarding Risk-Informed Completion Times in Technical Specifications ML22146A2072022-07-15015 July 2022 Issuance of Amendment Nos. 281 and 264 Revise Technical Specifications to Adopt TSTF-564, Safety Limit MCPR - NON-PROPRIETARY - ML21229A1572021-11-0404 November 2021 Issuance of Amendment No. 263 Temporary Change to Unit 2 Technical Specification 3.8.7 to Allow Replacement of Unit 1 480 Volt Load Center Transformers ML21095A3042021-04-19019 April 2021 Relief Request 4RR-02 Regarding Extension of Permanent Relief from Ultrasonic Examination of Reactor Pressure Vessel Circumferential Shell Welds ML20317A3142021-03-10010 March 2021 Issuance of Amendment Nos. 280 and 262 Revise Technical Specification 3.8.1, AC Sources-Operating, to Create a New Condition for an Inoperable Manual Synchronization Circuit ML20342A2372021-02-18018 February 2021 Issuance of Amendment Nos. 279 and 261 Revise Technical Specifications to Adopt TSTF-582, RPV WIC Enhancements ML20168B0042021-01-21021 January 2021 Issuance of Amendment Nos. 278 and 260 to Allow Application of Advanced Framatome Atrium 11 Fuel Methodologies (EPID L-2019-LLA-0153) (Redacted) ML20297A5642020-12-22022 December 2020 Issuance of Amendment Nos. 277 and 259 Revise Technical Specifications to Adopt TSTF-529, Revision 4, Clarify Use and Application Rules ML20199G7492020-10-0808 October 2020 Issuance of Amendment Nos. 276 and 258 Revise Technical Specification 5.5.2 to Modify the Design-Basis Loss-of-Coolant Accident Analysis ML20028E8842020-02-10010 February 2020 Correction to Amendment Nos. 275 and 257 Temporary Changes to Allow Replacement of the Emergency Service Water System Piping ML19248A8442020-01-17017 January 2020 Issuance of Amendment Nos. 275 and 257 Temporary Changes to Allow Replacement of Emergency Service Water System Piping ML19336D0642020-01-13013 January 2020 Issuance of Amendment Nos. 274 and 256 to Revise Shutdown Margin Definition to Address Advanced Fuel (TSTF-535, Revision 0) ML19155A2642019-07-16016 July 2019 Issuance of Amendment Nos. 273 and 255 Adoption of TSTF-439, Revision 2, Eliminate Second Completion Times Limiting Time from Discovery of Failure to Meet an LCO ML19154A0602019-06-24024 June 2019 Issuance of Amendment Nos. 272 and 254 Technical Specifications to Adopt TSTF-501, Revision 1, Relocated Stored Fuel Oil and Lube Oil Volume Values to Licensee Control ML18302A3032019-01-0303 January 2019 SE Regarding Implementation of Hardened Containment Vents Capable of Operation Under Severe Accident Conditions Related to Order Ea-13-109 (CAC Nos. MF4364 and MF4365; EPID No. L-2014-JLD-0055 ML18284A4552018-11-0707 November 2018 Safety Evaluation Regarding Implementation of Mitigation Strategies and Reliable Spent Fuel Pool Instrumentation Related to Orders EA-12-049 and EA-12-051 ML18222A2032018-09-26026 September 2018 Issuance of Amendment Nos. 271 and 253 Revising Technical Specifications to Adopt TSTF-542, Revision 2 (CAC Nos. MG0269 and MG0270; EPID L-2017-LLA-0306) ML17187A2972017-07-28028 July 2017 Susquehanna Steam Electric Station, Units 1 and 2 - Issuance of Amendments Revising Technical Specifications to Adopt TSTF-522, Revision 0 (CAC Nos. MF9154 and MF9155) ML17067A4442017-03-27027 March 2017 Issuance of Amendments Secondary Containment Access Openings ML16320A0802016-11-30030 November 2016 NON-PROPRIETARY - Safety Evaluation by NRR Related to Indirect Transfer of Renewed Operating Licenses from Talen Energy Corporation to Riverstone Holdings, LLC for the Susquehanna Steam Electric Station, Units 1 and 2 ML16005A2342016-05-20020 May 2016 Issuance of Amendments Adoption of TSTF-425 ML16069A1992016-05-10010 May 2016 Relief Requests for the Third 10-Year Inservice Inspection Interval (CAC Nos. MF6302 Through MF6307) ML16062A2162016-03-28028 March 2016 Issuance of Amendments Emergency Action Level Scheme Change ML15267A3812015-11-0202 November 2015 Issuance of Amendments Approval of Cyber Security Plan Milestone 8 ML15243A1402015-09-30030 September 2015 Issuance of Amendments Revisions to Technical Specification 3.4.10, Reactor Coolant System Pressure and Temperature (P/T) Limits ML15098A4782015-04-28028 April 2015 Relief Requests 4RR-01: Use of a Risk-Informed Inservice Inspection Alternative for the Fourth 10-Year Inservice Inspection Interval (TAC Nos. MF5097 and MF5098) ML15054A0582015-04-10010 April 2015 Letter Forwarding Order Approving Transfer of Licenses and Conforming Amendments Related to Susquehanna Steam Electric Station, Units 1 and 2 (TAC MF4426 and MF4427) ML14141A0732014-06-0909 June 2014 Relief Requests for the Fourth 10-Year Inservice Inspection Interval (TAC Nos. MF2705 Through MF2714) ML14122A1972014-05-22022 May 2014 Relief Requests for the Fourth 10-Year Inservice Testing Interval (TAC Nos. MF2905 Through MF2912 and MF2915) ML14111A0522014-05-14014 May 2014 Issuance of Amendments Regarding Change to Technical Specification Surveillance Requirement 3.5.1.12 ML14028A3952014-03-12012 March 2014 Request for Relief 3RR-20 from the Requirements of the American Society of Mechanical Engineers Section XI ML14036A2572014-02-26026 February 2014 Issuance of Amendment Change to Allow Only One Manual Trip System to Be Operable for the Residual Heat Removal Shutdown Cooling System in Modes 4 and 5 ML12160A1942012-06-11011 June 2012 Review of 60-Day Response to Request for Information Regarding Recommendation 9.3, of the Near-Term Task Force Related to the Fukushima Daiichi Nuclear Power Plant Accident ML1211701292012-04-27027 April 2012 Correction to Issuance of Amendment ML12096A1582012-04-19019 April 2012 Issuance of Amendment Temporary Change to Unit 2 Technical Specifications 3.8.7 and 3.7.1 to Allow Implementation of Multiple Spurious Operations Modifications on SSES Unit 1, 4160 V Buses ML12062A1332012-03-0606 March 2012 ME7902 & ME7903-Approval of RR-2012-001 Use of Later Edition of the ASME OM Code for Check Valve Condition Monitoring Program ML12046A0462012-02-23023 February 2012 Relief Request No. 3RR-18, Regarding Relief from the Requirements of the ASME Code for Successive Inspections ML11292A1372011-11-17017 November 2011 ME5050 & ME5051-Issuance of Amendments to Renewed FOLs Changes to TS SR 3.4.3.1, Safety Relief Valve Tolerances from -3% to -5% ML11221A2712011-09-0808 September 2011 License Amendment, Issuance of Amendment Adoption of TSTF-514, Revision 3 ML11152A0092011-07-21021 July 2011 Issuance of Amendment Approval of the PPL Susquehanna, LLC Cyber Security Plan ML1035600052011-01-0404 January 2011 Approval of Relief Request RR-02, Revision 1, to Allow 6 Month Extension for SRV IST ML1015204312010-06-16016 June 2010 Request for Alternative No. RR-07 Main Steam Safety Relief Valve Test Interval Extension ML0935201522010-01-0707 January 2010 Relief Requests RR-07 and RR-08 from the Requirements of the OM Code Inservice Testing of Safety Relief Valves 2023-09-19
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July 17, 2002 MEMORANDUM TO: Richard Laufer, Chief Section I-2, Project Directorate I Division of Licensing and Project Management FROM: F. Mark Reinhart, Chief/RA/ Mark Caruso for/
Licensing Section Probabilistic Safety Assessment Branch Division of Systems Safety and Analysis
SUBJECT:
SAFETY EVALUATION INPUT FOR PROPOSED CHANGES TO THE SUSQUENHANNA, UNITS 1&2 TECHNICAL SPECIFICATIONS IMPLEMENTING OPERABILITY REQUIREMENTS FOR THE ULTIMATE HEAT SINK SPRAY VALVES (TAC NOS. MB2119, MB2120)
In response to your request, the Probabilistic Safety Assessment Branch (SPSB) in the Division of Systems Safety and Analysis (DSSA) has completed its review of the licensees basis for concluding that the small array valves that return service water coolant to the ultimate heat sink do not meet criterion 4 of 10CFR 50.36(2)(ii)(c)(D) for inclusion in technical specifications. Our input for the staff safety evaluation is attached.
In light of the fact that the licensee has categorized the small array valves as non-risk significant as part of implementing the Maintenance Rule and the staff has found the licensees categorization process to be acceptable under the Maintenance Rule Base Line Inspection Program, we accept the licensees conclusion that criterion 4 is not met for these valves, i.e.,
that neither operating experience or probabilistic risk assessment has shown these valves to be significant to public health and safety.
Docket Nos. 50-387, 50-388
Attachment:
Safety Evaluation CONTACT: Mark Caruso, SPSB/DSSA 415-1310
July 17, 2002 MEMORANDUM TO: Richard Laufer, Chief Section I-2, Project Directorate I Division of Licensing and Project Management FROM: F. Mark Reinhart, Chief/RA/ Mark Caruso for/
Licensing Section Probabilistic Safety Assessment Branch Division of Systems Safety and Analysis
SUBJECT:
SAFETY EVALUATION INPUT FOR PROPOSED CHANGES TO THE SUSQUENHANNA, UNITS 1&2 TECHNICAL SPECIFICATIONS IMPLEMENTING OPERABILITY REQUIREMENTS FOR THE ULTIMATE HEAT SINK SPRAY VALVES (TAC NOS. MB2119, MB2120)
In response to your request, the Probabilistic Safety Assessment Branch (SPSB) in the Division of Systems Safety and Analysis (DSSA) has completed its review of the licensees basis for concluding that the small array valves that return service water coolant to the ultimate heat sink do not meet criterion 4 of 10CFR 50.36(2)(ii)(c)(D) for inclusion in technical specifications. Our input for the staff safety evaluation is attached.
In light of the fact that the licensee has categorized the small array valves as non-risk significant as part of implementing the Maintenance Rule and the staff has found the licensees categorization process to be acceptable under the Maintenance Rule Base Line Inspection Program, we accept the licensees conclusion that criterion 4 is not met for these valves, i.e.,
that neither operating experience or probabilistic risk assessment has shown these valves to be significant to public health and safety.
Docket Nos. 50-387, 50-388
Attachment:
Safety Evaluation DISTRIBUTION SPSB R/F MCaruso DOCUMENT NAME: G:\SPSB\caruso\susquehanna_crit4.wpd ACCESSION NO.:ML021980258 TEMPLATE NO.NRR-096 To receive a copy of this document, indicate in the box C=Copy w/o attachment/enclosure E=Copy with attachment/enclosure N = No copy OFFICE SPSB:DSSA SC:SPSB:DSSA NAME MCaruso FMReinhart/c/M. Caruso for DATE 07/17/02 07/ 17/02 OFFICIAL FILE COPY
SPSB COVER PAGE DOCUMENT: G:\SPSB\caruso\susquehanna_crit4.wpd
SUBJECT:
SAFETY EVALUATION INPUT FOR PROPOSED CHANGES TO THE SUSQUENHANNA, UNITS 1&2 TECHNICAL SPECIFICATIONS IMPLEMENTING OPERABILITY REQUIREMENTS FOR THE ULTIMATE HEAT SINK SPRAY VALVES (TAC NOS. MB2119, MB2120)
ORIGINATOR M. Caruso, 415-1310 SECRETARY: Nasreen Hasan, 415-3229 DATE: July 17, 2002
ROUTING LIST
NAME DATE
- 1. M.Caruso 07/ /02
- 2. M. Reinhart 07/ /02
- 3. 07/ /02
- 4. 07/ /02
- 5. 07/ /02
- 6. Secretary/Dispatcher 07/ /02 ADAMS ACCESSION #:ML0 TEMPLATE #: NRR-096
SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION FACILITY OPERATING LICENSE NO NPF-14, NPF-22 PP&L Susquehanna LLC SUSQUEHANNA STEAM ELECTRIC STATION DOCKET NOS. 50-387, 50-388 1 INTRODUCTION By letter dated June 1, 2001, supplemented by a letter dated June 28, 2002, PPL Susquehanna, LLC (the licensee),
requested an amendment to Facility Operating License No. NPF-14 and NPF-22 for the Susquehanna Steam Electric Station. The proposed amendment would modify Technical Specification (TS) Surveillance Requirement SR 3.7.1 to add operability requirements and surveillance requirements for the Ultimate Heat Sink (UHS) spray bypass valves and large array valves. The proposed change also reduces the allowed completion times for the conditions applicable to the Residual Heat Removal Service Water (RHRSW) system. The proposed change does not add operability requirements and surveillance requirements for the UHS small array valves. The licensees rationale for not adding requirements for the small array valves is that the small array valves do not satisfy any of the criteria in 10CFR50.36 for inclusion of limiting conditions for operation in the Technical Specifications. This evaluation addresses the licensees assessment against Criterion 4 in 10CFR50.36, i.e.,
A structure, system or component which operating experience or probabilistic risk assessment has shown to be significant to public health and safety.
Licensee assessments against other criteria in 10CFR50.36 are addressed elsewhere.
2 EVALUATION In lieu of specific guidance for addressing Criterion 4 in 10CFR 50.36, the licensee has utilized assessments of safety significance made per the Maintenance Rule (i.e., 10CFR 50.65) for the UHS components as the basis for determining whether or not the components in question are significant to public health and safety. These assessments have been made using a risk ranking process based on a probabilistic risk assessment and insights from the licensees Maintenance Rule Expert Panel and Generic Letter 89-10 (Motor Operated Valves) Expert Panel.
Using the Maintenance Rule assessment program, the licensee classified the spray bypass valves and large spray array valves as High Safety Significant. These valves provide a redundant primary means of success for the Residual Heat Removal Service Water system and Emergency Service Water system. While the small array valves can provide a back-up success path under some conditions, the time requirement for these valves to operate is greater than four hours, which allows for manual actuation of these valves if either of the primary success paths cannot be recovered. These factors are significant contributors to the relatively low risk importance of the small Attachment
array valves which has driven the licensees significance determination for these valves to a non-risk significant classification.
The staff believes that in lieu of specific staff guidance for addressing Criterion 4 in 10CFR 50.36, use of the Maintenance Rule assessment process is an acceptable means of addressing criterion 4 of 10CFR 50.36 for the small array valves at Susquehanna Units 1 and 2 because (1) it utilizes probabilistic risk assessment and also allows for insights from operating experience to be brought to bear via the expert panel review process, and (2) the licensees assessment process was found to be adequate by the NRC in the Maintenance Rule Base Line Inspection Program (Inspection Report 50-387/98-04 & 50-388/98-04, dated July 16, 1998).
3 CONCLUSION In light of the fact that the licensee has categorized the small array valves as non-risk significant as part of implementing the Maintenance Rule and the staff has found the licensees categorization process to be acceptable under the Maintenance Rule Base Line Inspection Program, the staff accepts the licensees conclusion that criterion 4 is not met for these valves, i.e., that neither operating experience or probabilistic risk assessment has shown these valves to be significant to public health and safety.
Principal contributor:
Mark Caruso Attachment