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Category:Letter type:NLS
MONTHYEARNLS2024053, Licensee Guarantees of Payment of Deferred Premiums2024-07-30030 July 2024 Licensee Guarantees of Payment of Deferred Premiums NLS2024055, Data from Metamic Coupon Sampling Program2024-07-29029 July 2024 Data from Metamic Coupon Sampling Program NLS2024052, Supplement to the Application to Modify the Allowable Value for Cooper Nuclear Station Technical Specifications High Pressure Coolant Injection Pump Discharge Low Flow2024-07-24024 July 2024 Supplement to the Application to Modify the Allowable Value for Cooper Nuclear Station Technical Specifications High Pressure Coolant Injection Pump Discharge Low Flow NLS2024051, Supplement to the Application to Revise Technical Specifications to Adopt TSTF-374, Revision to Diesel Fuel Oil Testing Program2024-07-0303 July 2024 Supplement to the Application to Revise Technical Specifications to Adopt TSTF-374, Revision to Diesel Fuel Oil Testing Program NLS2024025, License Amendment Request to Revise Technical Specifications Table 3.3.2.1-1, Control Rod Block Instrumentation2024-05-0909 May 2024 License Amendment Request to Revise Technical Specifications Table 3.3.2.1-1, Control Rod Block Instrumentation NLS2024037, 2023 Annual Radiological Environmental Report2024-05-0808 May 2024 2023 Annual Radiological Environmental Report NLS2024030, Annual Radioactive Effluent Release Report2024-04-25025 April 2024 Annual Radioactive Effluent Release Report NLS2024033, Preparation and Scheduling of Operator Licensing Examinations2024-04-25025 April 2024 Preparation and Scheduling of Operator Licensing Examinations NLS2024031, Notice of Intent to Apply for Subsequent Renewal of Operating License2024-04-22022 April 2024 Notice of Intent to Apply for Subsequent Renewal of Operating License NLS2024036, Nebraska Public Power District 2023 Financial Report2024-04-19019 April 2024 Nebraska Public Power District 2023 Financial Report NLS2024006, Response to Nuclear Regulatory Commission'S Request for Additional Information for Relief Request RC3-022024-01-25025 January 2024 Response to Nuclear Regulatory Commission'S Request for Additional Information for Relief Request RC3-02 NLS2024007, Emergency Plan Implementing Procedure 5.7.1, Revision 732024-01-16016 January 2024 Emergency Plan Implementing Procedure 5.7.1, Revision 73 NLS2024003, 30 Day Report - Unauthorized Disassembly of Liquid Scintillation Detector2024-01-15015 January 2024 30 Day Report - Unauthorized Disassembly of Liquid Scintillation Detector NLS2024004, Annual Report of Changes and Errors in Emergency Core Cooling System Evaluation Models for 20232024-01-10010 January 2024 Annual Report of Changes and Errors in Emergency Core Cooling System Evaluation Models for 2023 NLS2023053, ISFSI, Supplement to Exemption Request from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation2023-11-30030 November 2023 ISFSI, Supplement to Exemption Request from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation NLS2023050, Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation2023-11-22022 November 2023 Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation NLS2023045, Application to Revise Technical Specifications to Adopt TSTF-374, Revision to Diesel Fuel Oil Testing Program2023-11-15015 November 2023 Application to Revise Technical Specifications to Adopt TSTF-374, Revision to Diesel Fuel Oil Testing Program NLS2023051, Response to Nuclear Regulatory Commission Request for Additional Information Regarding Application to Revise Technical Specifications to Adopt TSTF-551, Revise Secondary Containment Surveillance Requirements2023-10-10010 October 2023 Response to Nuclear Regulatory Commission Request for Additional Information Regarding Application to Revise Technical Specifications to Adopt TSTF-551, Revise Secondary Containment Surveillance Requirements NLS2023049, 10 CFR Part 21 Report Regarding HGA Relays2023-09-0606 September 2023 10 CFR Part 21 Report Regarding HGA Relays NLS2023029, License Amendment Request to Revise Technical Specifications to Support Inspection of Diesel Fuel Oil Storage Tanks2023-09-0606 September 2023 License Amendment Request to Revise Technical Specifications to Support Inspection of Diesel Fuel Oil Storage Tanks NLS2023047, Licensee Guarantees of Payment of Deferred Premiums2023-07-26026 July 2023 Licensee Guarantees of Payment of Deferred Premiums NLS2023033, 10 CFR 50.55a Relief Request RC3-022023-06-27027 June 2023 10 CFR 50.55a Relief Request RC3-02 NLS2023039, Preparation and Scheduling of Operator Licensing Examinations2023-06-0101 June 2023 Preparation and Scheduling of Operator Licensing Examinations NLS2023038, Nebraska Public Power District 2022 Financial Report2023-05-22022 May 2023 Nebraska Public Power District 2022 Financial Report NLS2023031, Annual Radiological Environmental Report2023-05-11011 May 2023 Annual Radiological Environmental Report NLS2023017, Application to Revise Technical Specifications to Adopt TSTF-551, Revise Secondary Containment Surveillance Requirements2023-05-0303 May 2023 Application to Revise Technical Specifications to Adopt TSTF-551, Revise Secondary Containment Surveillance Requirements NLS2023018, Application to Revise Technical Specifications to Adopt TSTF-580, Provide Exception from Entering Mode 4 with No Operable RHR Shutdown Cooling2023-05-0303 May 2023 Application to Revise Technical Specifications to Adopt TSTF-580, Provide Exception from Entering Mode 4 with No Operable RHR Shutdown Cooling NLS2023030, Annual Radioactive Effluent Release Report2023-04-27027 April 2023 Annual Radioactive Effluent Release Report NLS2023007, Technical Specification Bases Changes2023-04-17017 April 2023 Technical Specification Bases Changes NLS2023027, Annual Report of Individual Exposure Monitoring2023-04-13013 April 2023 Annual Report of Individual Exposure Monitoring NLS2023021, Quality Assurance Program Changes2023-04-10010 April 2023 Quality Assurance Program Changes NLS2023020, Decommissioning Funding2023-03-29029 March 2023 Decommissioning Funding NLS2023019, Property Insurance Coverage2023-03-23023 March 2023 Property Insurance Coverage NLS2023010, Inservice Inspection OAR-1 Owner'S Activity Report for Cooper Nuclear Station2023-02-0909 February 2023 Inservice Inspection OAR-1 Owner'S Activity Report for Cooper Nuclear Station NLS2023005, Annual Report of Changes and Errors in Emergency Core Cooling System Evaluation Models for 20222023-01-19019 January 2023 Annual Report of Changes and Errors in Emergency Core Cooling System Evaluation Models for 2022 NLS2022054, Preparation and Scheduling of Operator Licensing Examinations2023-01-0505 January 2023 Preparation and Scheduling of Operator Licensing Examinations NLS2022055, Emergency Plan, Revision 812023-01-0404 January 2023 Emergency Plan, Revision 81 NLS2022053, CNS-2022-11 Post Exam Submittal2022-11-22022 November 2022 CNS-2022-11 Post Exam Submittal NLS2022050, Notification of Revision to Cooper Nuclear Station Emergency Response Data System Data Point Library2022-11-0909 November 2022 Notification of Revision to Cooper Nuclear Station Emergency Response Data System Data Point Library NLS2022048, Management Change and Correspondence Update2022-11-0101 November 2022 Management Change and Correspondence Update NLS2022047, Core Operating Limits Report, Cycle 33, Revision 02022-10-14014 October 2022 Core Operating Limits Report, Cycle 33, Revision 0 NLS2022042, 10 CFR 50.59(d)(2) and 10 CFR 72.48(d)(2) Summary Report2022-10-0707 October 2022 10 CFR 50.59(d)(2) and 10 CFR 72.48(d)(2) Summary Report NLS2022037, Emergency Plan, Revision 80, Summary of 50.54(q) Analyses2022-08-18018 August 2022 Emergency Plan, Revision 80, Summary of 50.54(q) Analyses NLS2022035, Evacuation Time Estimate Report for Cooper Nuclear Station2022-08-16016 August 2022 Evacuation Time Estimate Report for Cooper Nuclear Station NLS2022031, Licensee Guarantees of Payment of Deferred Premiums2022-07-19019 July 2022 Licensee Guarantees of Payment of Deferred Premiums NLS2022005, Application to Revise Technical Specifications to Adopt TSTF-554, Revision 1, Revise Reactor Coolant Leakage Requirements2022-06-16016 June 2022 Application to Revise Technical Specifications to Adopt TSTF-554, Revision 1, Revise Reactor Coolant Leakage Requirements NLS2022025, Nebraska Public Power District Letter (NLS2022010) to U.S. Nuclear Regulatory Commission Dated April 5, 2022, Annual Report of Individual Exposure Monitoring2022-06-0606 June 2022 Nebraska Public Power District Letter (NLS2022010) to U.S. Nuclear Regulatory Commission Dated April 5, 2022, Annual Report of Individual Exposure Monitoring NLS2022016, Annual Radiological Environmental Report2022-05-10010 May 2022 Annual Radiological Environmental Report NLS2022020, Nebraska Public Power District, Cooper Nuclear Station, 2021 Financial Report2022-05-0202 May 2022 Nebraska Public Power District, Cooper Nuclear Station, 2021 Financial Report NLS2022014, Annual Radioactive Effluent Release Report2022-04-27027 April 2022 Annual Radioactive Effluent Release Report 2024-07-30
[Table view] Category:Response to Request for Additional Information (RAI)
MONTHYEARNLS2024006, Response to Nuclear Regulatory Commission'S Request for Additional Information for Relief Request RC3-022024-01-25025 January 2024 Response to Nuclear Regulatory Commission'S Request for Additional Information for Relief Request RC3-02 NLS2023051, Response to Nuclear Regulatory Commission Request for Additional Information Regarding Application to Revise Technical Specifications to Adopt TSTF-551, Revise Secondary Containment Surveillance Requirements2023-10-10010 October 2023 Response to Nuclear Regulatory Commission Request for Additional Information Regarding Application to Revise Technical Specifications to Adopt TSTF-551, Revise Secondary Containment Surveillance Requirements NLS2022004, Response to Nuclear Regulatory Commission'S Request for Additional Information Regarding Relief Request RR5-01, Revision 12022-02-0707 February 2022 Response to Nuclear Regulatory Commission'S Request for Additional Information Regarding Relief Request RR5-01, Revision 1 NLS2021066, Response to Nuclear Regulatory Commission'S Request for Additional Information Regarding Alternative Request RI5-02, Revision 32021-12-10010 December 2021 Response to Nuclear Regulatory Commission'S Request for Additional Information Regarding Alternative Request RI5-02, Revision 3 NLS2021065, Clarification of Response to Nuclear Regulatory Commission'S Request for Additional Information for Alternative Request RS-012021-12-0606 December 2021 Clarification of Response to Nuclear Regulatory Commission'S Request for Additional Information for Alternative Request RS-01 NLS2021058, Response to Nuclear Regulatory Commission'S Request for Additional Information for Alternative Request RS-012021-10-12012 October 2021 Response to Nuclear Regulatory Commission'S Request for Additional Information for Alternative Request RS-01 NLS2020051, Response to Nuclear Regulatory Commission'S Supplemental Request for Additional Information for License Amendment Request for Approval of Emergency Action Level Scheme Change2020-08-25025 August 2020 Response to Nuclear Regulatory Commission'S Supplemental Request for Additional Information for License Amendment Request for Approval of Emergency Action Level Scheme Change ML18311A1862018-11-0505 November 2018 Email (11-5-18) RR RFI Responses for Review NLS2018029, Response to Nuclear Regulatory Commission Request for Additional Information for Relief Request RR5-032018-05-16016 May 2018 Response to Nuclear Regulatory Commission Request for Additional Information for Relief Request RR5-03 NLS2018017, Response to Nuclear Regulatory Commission Request for Additional Information Regarding Nebraska Public Power District'S Decommissioning Funding Plan Update for Cooper Nuclear Station Independent Spent Fuel Storage Installation2018-04-11011 April 2018 Response to Nuclear Regulatory Commission Request for Additional Information Regarding Nebraska Public Power District'S Decommissioning Funding Plan Update for Cooper Nuclear Station Independent Spent Fuel Storage Installation ML18241A3822018-03-23023 March 2018 CNS Email to Beaulieu, George, Kumana: Response to CNS Fan Coil Unit Questions NLS2018012, Response to Nuclear Regulatory Commission Request for Additional Information for Relief Request RI5-032018-03-14014 March 2018 Response to Nuclear Regulatory Commission Request for Additional Information for Relief Request RI5-03 NLS2018011, Response to Nuclear Regulatory Commission Request for Additional Information for Relief Requests RR5-02 and RR5-032018-03-0808 March 2018 Response to Nuclear Regulatory Commission Request for Additional Information for Relief Requests RR5-02 and RR5-03 NLS2017095, Response to Nuclear Regulatory Commission Request for Additional Information for Relief Request RI-21, Revision 12017-11-30030 November 2017 Response to Nuclear Regulatory Commission Request for Additional Information for Relief Request RI-21, Revision 1 NLS2017072, Nebraska Public Power District'S Seismic High Frequency Confirmation - Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Seismic Aspects of Recommendation 2.1 of Near-Term Task Force Review of Insights from2017-08-24024 August 2017 Nebraska Public Power District'S Seismic High Frequency Confirmation - Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Seismic Aspects of Recommendation 2.1 of Near-Term Task Force Review of Insights from t ML17244A2812017-05-0808 May 2017 16C4384-RPT-005, Rev 005, 50.54(f) NTTF 2.1 Seismic High Frequency Confirmation. NLS2017012, Response to NRC Request for Information Regarding Near Term Task Force Recommendation 2.1 (Seismic) - Spent Fuel Pool Evaluation Report2017-02-0808 February 2017 Response to NRC Request for Information Regarding Near Term Task Force Recommendation 2.1 (Seismic) - Spent Fuel Pool Evaluation Report NLS2016067, Response to Request for Additional Information Regarding License Amendment Request to Adopt TSTF-425, Revision 32016-12-0707 December 2016 Response to Request for Additional Information Regarding License Amendment Request to Adopt TSTF-425, Revision 3 NLS2016075, Response to Nuclear Regulatory Commission RAI Regarding License Amendment Request to Adopt TSTF-425, Rev 32016-12-0707 December 2016 Response to Nuclear Regulatory Commission RAI Regarding License Amendment Request to Adopt TSTF-425, Rev 3 ML16258A3732016-11-16016 November 2016 Cooper Nuclear Station - Response Regarding Phase 2 Staffing Submittals Associated with Near-Term Task Force Recommendation 9.3 Related to the Fukushima Dai-Ichi Nuclear Power Plant Accident (CAC No. MF7776) NLS2016053, Nebraska Public Power District'S Spent Fuel Pool Evaluation Report - Response to Nuclear Regulatory Commission Request for Information2016-09-14014 September 2016 Nebraska Public Power District'S Spent Fuel Pool Evaluation Report - Response to Nuclear Regulatory Commission Request for Information ML16252A2232016-08-29029 August 2016 Response to NRC Request for Additional Information Regarding License Amendment Request to Revise Technical Specifications - Safety Limit Minimum Critical Power Ratio NLS2016045, Nebraska, Final Six-Month Status Report and Response to Request for Additional Information in Response to Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051)2016-08-22022 August 2016 Nebraska, Final Six-Month Status Report and Response to Request for Additional Information in Response to Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051) NLS2016029, Response to NRC Request for Information Pursuant to 10CFR 50.54(f) Regarding Recommendation 9.3, Emergency Preparedness - Staffing, Requested Information Items 1,2, and 6 - Phase 2 Staffing Assessment2016-05-18018 May 2016 Response to NRC Request for Information Pursuant to 10CFR 50.54(f) Regarding Recommendation 9.3, Emergency Preparedness - Staffing, Requested Information Items 1,2, and 6 - Phase 2 Staffing Assessment ML16084A1822016-03-17017 March 2016 Response to Nuclear Regulatory Commission Request for Additional Information (RAI) Regarding Proposed Changes to the Technical Specifications for Implementation of a New Pressure-Temperature Limits Report NLS2015133, Response to Nuclear Regulatory Commission Request for Additional Information for Relief Request for Fifth Ten-Year Inservice Inspection Interval, R15-022015-12-21021 December 2015 Response to Nuclear Regulatory Commission Request for Additional Information for Relief Request for Fifth Ten-Year Inservice Inspection Interval, R15-02 NLS2015123, Response to Nuclear Regulatory Commission Requests for Additional Information for Relief Request for Fifth Ten-Year Inservice Inspection Interval, RP5-012015-11-0909 November 2015 Response to Nuclear Regulatory Commission Requests for Additional Information for Relief Request for Fifth Ten-Year Inservice Inspection Interval, RP5-01 NLS2015112, Response to NRC Requests for Additional Information for Relief Request No. RR5-01, Alternate Weld Overlay Repair for a Dissimilar Metal Weld Joining Nozzle to Control Rod Drive End Cap2015-10-29029 October 2015 Response to NRC Requests for Additional Information for Relief Request No. RR5-01, Alternate Weld Overlay Repair for a Dissimilar Metal Weld Joining Nozzle to Control Rod Drive End Cap NLS2015113, Response to NRC Requests for Additional Information for Relief Request for Fifth Ten-Year Inservice Inspection Interval, R15-022015-10-21021 October 2015 Response to NRC Requests for Additional Information for Relief Request for Fifth Ten-Year Inservice Inspection Interval, R15-02 NLS2015086, Response to Nuclear Regulatory Commission Additional Requests for Additional Information for License Amendment Request to Delete Condensate Storage Tank as an Alternate Source of Makeup Water2015-07-13013 July 2015 Response to Nuclear Regulatory Commission Additional Requests for Additional Information for License Amendment Request to Delete Condensate Storage Tank as an Alternate Source of Makeup Water NLS2015080, Response to Request for Additional Information for Relief Requests RP-08, Comprehensive Pump Test Upper Limit, and RP-09, Variance Around the Reference Values, for Fifth Ten-Year Interval Pump and Valve Inservice Testing Program2015-06-30030 June 2015 Response to Request for Additional Information for Relief Requests RP-08, Comprehensive Pump Test Upper Limit, and RP-09, Variance Around the Reference Values, for Fifth Ten-Year Interval Pump and Valve Inservice Testing Program NLS2015068, Response to Request for Additional Information Associated with Near-Term Task Force Recommendation 2. 1, Seismic Hazard and Screening Report2015-06-22022 June 2015 Response to Request for Additional Information Associated with Near-Term Task Force Recommendation 2. 1, Seismic Hazard and Screening Report 2024-01-25
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Nebraska Public Power District Always there when you need us NLS2015133 December 21, 2015 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555-0001
Subject:
Response to Nuclear Regulatory Commission Request for Additional Information for Relief Request for Fifth Ten-Year Inservice Inspection Interval, RI5-02 Cooper Nuclear Station, Docket No. 50-298, DPR-46
References:
- 1. Email from Thomas Wengert, Nuclear Regulatory Commission, to Jim Shaw, Nebraska Public Power District, dated November 19, 2015, "Cooper - 10CFR 50.55a Request for Fifth Ten-Year Inservice Inspection Interval, RI5-02 (CAC No. MF6336)"
- 2. Letter from Oscar A. Limpias, Nebraska Public Power District, to the U.S.
Nuclear Regulatory Commission, dated June 9, 2015, "10 CFR 50.55a Requests for Fifth Ten-Year Inservice Inspection Interval" (ML15167A066)
Dear Sir or Madam:
The purpose of this letter is for the Nebraska Public Power District to respond to the Nuclear Regulatory Commnission's Request for Additional Information (RAI) (Reference 1) related to the Cooper Nuclear Station "10 CFR 50.55a Requests for Fifth Ten-Year Inservice Inspection Interval" (Reference 2).
The response to the specific RAI question is provided in the attachment to this letter.
This letter does not contain any new regulatory commitments.
If you have any questions concerning this matter, please contact Jim Shaw, Licensing Manager, at (402) 825-2788.
Vice President - Nuclear and Chief Nuclear Officer POBox. 9 / Bwnil, N 8321-098 M Tele phone: (402) 825-3811 /Fax:. (402) 825-5211 www.nppd.com
NLS2015 133 Page 2 of 2
/dv
Attachment:
Response to Nuclear Regulatory Commission Request for Additional Information for 10 CFR 50.55a Request for Fifth Ten-Year Inservice Inspection Interval, RI5-02 cc: Regional Administrator w/ attachment USNRC - Region IV Cooper Project Manager wI/attachment USNRC - NRR Project Directorate IV- 1 Senior Resident Inspector wI/attachment USNRC - CNS NPG Distribution w/o attachment CNS Records w/ attachment
NLS2015 133 Attachment Page 1 of 2 Attachment Response to Nuclear Regulatory Commission Request for Additional Information for 10 CFR 50.55a Request for Fifth Ten-Year Inservice Inspection Interval, R15-02 Cooper Nuclear Station, Docket No. 50-298, DPR-46 The Nuclear Regulatory Commission (NRC) request for additional information (RAL) regarding the 10 CFR 50.55a Request for Fifth Ten-Year Inservice Inspection Interval is shown in italics.
The Nebraska Public Power District (NPPD) response to the request is shown in normal font.
RAI November 9. 2015 E-mail In an e-mail dated September 16, 2015 (ADAMS Accession No. ML15259A579), the staff requested the following requestfor additionalinformation (RAI) concerning the subject relief request submitted on June 9, 2015 (ADAMS Accession No. ML15167A066). RAI-1 and RAI-2 are not included.
RAJ-3: Confirm whether a plant-specific leakage assessment was performed, as required by B WR VIP-18, B WR VIP-41, and BWR VIP-76 for the internals at CNS [Cooper Nuclear Station] that accountsfor the leakagefrom all internalsthat impact the ability to cool the core and maintainpeak clad temperature (PCT) within allowed limits duringpostulated loss of coolant accidents. Provide a summary of fall internal components included in the leakage assessment along with a summary of the followingfor each component:
(a) the number and length of all cracks detected in past examinationsfor the component (b) the number and length offall cracks evaluated in the leakage assessment (c) the calculated leak ratefrom each crack evaluated in the leakage assessment Confirm whether a plant-specific integratedleakage assessment (ifany) associated with the aforementionedR VI components was performed at CNS.
In a letter dated October 21, 2015 (ADAMS Accession No. ML15301A249), the licensee sent a response to this RAI. The staff noted that the licensee did not provide information related to the following issue:
"Confirm whether a plant-specific leakage assessment was performed, as requiredby B WR VIP-18, B WR VIP-41, and B WR VIP-76 for the internals at CNS that accountsfor the leakage from all internals that impact the ability to cool the core and maintainpeak clad temperature (PCT) within allowed limits duringpostulated loss of coolant accidents."
NLS2015 133 Attachment Page 2 of 2 The NRC staff requests the licensee to provide this information.
November 19. 2015 E-mail On November 9, 2015, the U.S. Nuclear Regulatory Commission (NRC) staff sent Nebraska Public Power District(the licensee) the draft requestfor additionalinformation (RAI), provided below. This RA1 is related to the Cooper Nuclear Station (CNS) reliefrequest concerning the fifth Ten-Year Inservice Inspection Interval, RIS5-02.
A clarificationconference call was conducted on November 10, 2015, between the NRC staff and CNS representatives. The topic for discussion during this call is related to RAI-3, which was initially sent to the licensee in an e-mail dated September 16, 2015 (ADAMS Accession No. ML15259A579).
During the call, the licensee agreed to provide the following additional information related to RA1-3 :
The staff requested that the licensee provide a briefsummary of the plant-specific integrated leakage assessment considering the flaws in the core spray piping,]et pumps, and core shroud (assuming through wall cracking). The licensee agreedto provide the requestedinformation within 45 days of the date of the conference call.
NPPD Response In the context of the integrated leakage assessment over one 24-month cycle, the leakage through core spray is conservatively calculated to be 104.2 gallons per minute (gpm) with an allowable limit of 117.5 gpm. For the jet pump DF-l flaw, the leakage was calculated to be 4.8 gpm with an allowable limit of 25 gpm. The CNS SAFER/GESTR-LOCA analysis assumed 100 gpm leakage in core spray, so adding the leakage of the jet pump diffuser of 25 gpm along with the postulated flaws in the core shroud of 1,250 gpm, the combined leakage would increase the peak cladding temperature approximately 10 degrees Fahrenheit (0F).
The plant-specific integrated leakage assessment concluded that postulated leakage through the shroud at all eight horizontal welds and twenty-three vertical welds combined with leakage in the jet pump diffuser weld and core spray piping could increase the PCT analyzed in the CNS SAFER/GESTR-LOCA analysis by approximately 100 F, or from 2140°F to 21500 F but still below the 10 CFR 50.46(b) regulatory limit of 2200°F. The assessment, using conservative assumptions and BWRVIP methodology, demonstrated that leakage from these reactor pressure vessel internals over a 24-month cycle results in less than a 1% increase in PCT.