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MONTHYEARML0513800052005-05-19019 May 2005 Status of Review of Application for License Amendment to Extend the Completion Time for Restoration of Service Water Train to Operable Status Project stage: Approval ML0520707762005-07-29029 July 2005 RAI, Related to License Amendment Request for One-Time Extension to the Technical Specification Action Completion Time for Restoring a Service Water Train to Operable Status Project stage: RAI ML0601300372006-01-17017 January 2006 Withdrawal of an Amendment Request One-Time Extension to Technical Specification Action Completion Time to Restore a Service Water Train to Operable Status Project stage: Withdrawal 2005-07-29
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Category:Letter
MONTHYEARML24022A1172024-01-23023 January 2024 Acceptance of Requested Licensing Action Amendment Request to Revise Renewed Facility Operating License and Permanently Defueled Technical Specifications to Support Resumption of Power Operations ML24012A2422024-01-16016 January 2024 Acceptance of Requested Licensing Action License Transfer Request ML23236A0042023-12-27027 December 2023 Issuance of Amendment 274 Re Changes to Perm Defueled Emergency Plan and Perm Defueled Emergency Action Level Scheme ML23355A1242023-12-26026 December 2023 Withdrawal of an Amendment Request Re License Amendment Request to Revise License Condition to Eliminate Cyber Security Plan Requirements ML23192A0772023-12-26026 December 2023 Letter Exemption from the Requirements of 10 CFR 140.11(a)(4) Concerning Offsite Primary and Secondary Liability Insurance ML23191A5222023-12-22022 December 2023 Exemption Letter from the Requirements of 10 CFR 50.54(W)(1) Concerning Onsite Property Damage Insurance (EPID - L-2022-LLE-0032) ML23263A9772023-12-22022 December 2023 Exemption from Certain Emergency Planning Requirements and Related Safety Evaluation ML23354A2602023-12-21021 December 2023 Reference Simulator Inspection Request for Information L-23-019, Proof of Financial Protection 10 CFR 140.152023-12-18018 December 2023 Proof of Financial Protection 10 CFR 140.15 PNP 2023-030, License Amendment Request to Revise Renewed Facility Operating License and Permanently Defueled Technical Specifications to Support Resumption of Power Operations2023-12-14014 December 2023 License Amendment Request to Revise Renewed Facility Operating License and Permanently Defueled Technical Specifications to Support Resumption of Power Operations PNP 2023-035, Withdrawal of License Amendment Request - Revise License Condition to Eliminate Cyber Security Plan Requirements2023-12-12012 December 2023 Withdrawal of License Amendment Request - Revise License Condition to Eliminate Cyber Security Plan Requirements PNP 2023-028, Application for Order Consenting to Transfer of Control of License and Approving Conforming License Amendments2023-12-0606 December 2023 Application for Order Consenting to Transfer of Control of License and Approving Conforming License Amendments L-23-012, Master Decommissioning Trust Agreement Changes for Indian Point Nuclear Generating Units 1, 2 and 3, Pilgrim Nuclear Power Station, Palisades Nuclear Plant and the Non-Qualified Trust for Big Rock Point2023-11-13013 November 2023 Master Decommissioning Trust Agreement Changes for Indian Point Nuclear Generating Units 1, 2 and 3, Pilgrim Nuclear Power Station, Palisades Nuclear Plant and the Non-Qualified Trust for Big Rock Point ML23291A4402023-11-0303 November 2023 Acceptance of Requested Licensing Action Request for Exemption from 10 CFR 50.82(a)(2) to Support Reauthorization of Power Operations IR 05000255/20230032023-10-0404 October 2023 NRC Inspection Report No. 05000255/2023003(DRSS)-Holtec Decommissioning International, LLC, Palisades Nuclear Plant ML23275A0012023-10-0202 October 2023 Request for Withholding Information from Public Disclosure for Palisades Nuclear Plant PNP 2023-025, Request for Exemption from Certain Termination of License Requirements of 10 CFR 50.822023-09-28028 September 2023 Request for Exemption from Certain Termination of License Requirements of 10 CFR 50.82 PNP 2023-026, Pre-Submittal Meeting Presentation - Palisades Nuclear Plant License Transfer Application to Support Resumption of Power Operations2023-09-28028 September 2023 Pre-Submittal Meeting Presentation - Palisades Nuclear Plant License Transfer Application to Support Resumption of Power Operations PNP 2023-023, Special Report High Range Noble Gas Monitor Inoperable2023-08-0909 August 2023 Special Report High Range Noble Gas Monitor Inoperable ML23215A2302023-08-0303 August 2023 Notice of Organization Change - Chief Nuclear Officer IR 05000255/20230022023-07-19019 July 2023 NRC Inspection Report 05000255/2023002 DRSS-Holtec Decommissioning International, LLC, Palisades Nuclear Plant ML23087A0362023-05-0202 May 2023 PSDAR Review Letter ML23117A2172023-05-0101 May 2023 Safety Evaluation for Quality Assurance Program Manual Reduction in Commitment PNP 2023-018, 2022 Annual Non-Radiological Environmental Operating Report2023-04-25025 April 2023 2022 Annual Non-Radiological Environmental Operating Report L-23-004, HDI Annual Occupational Radiation Exposure Data Reports - 20222023-04-24024 April 2023 HDI Annual Occupational Radiation Exposure Data Reports - 2022 PNP 2023-007, and Big Rock Point, 2022 Annual Radioactive Effluent Release and Waste Disposal Reports2023-04-19019 April 2023 and Big Rock Point, 2022 Annual Radioactive Effluent Release and Waste Disposal Reports PNP 2023-008, 2022 Radiological Environmental Operating Report2023-04-18018 April 2023 2022 Radiological Environmental Operating Report L-23-003, Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations2023-03-31031 March 2023 Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations PNP 2023-002, 6 to Updated Final Safety Analysis Report2023-03-31031 March 2023 6 to Updated Final Safety Analysis Report ML23088A0382023-03-29029 March 2023 Stations 1, 2, & 3, Palisades Nuclear Plant, and Big Rock Point - Nuclear Onsite Property Damage Insurance PNP 2023-006, Report of Changes to Security Plan, Revision 202023-03-29029 March 2023 Report of Changes to Security Plan, Revision 20 PNP 2023-012, Presentation on Regulatory Path to Reauthorize Power Operations2023-03-16016 March 2023 Presentation on Regulatory Path to Reauthorize Power Operations ML23038A0982023-03-15015 March 2023 Request for Withholding Information from Public Disclosure ML23095A0642023-03-14014 March 2023 American Nuclear Insurers, Notice of Cancellation Rescinded PNP 2023-001, Regulatory Path to Reauthorize Power Operations2023-03-13013 March 2023 Regulatory Path to Reauthorize Power Operations PNP 2023-004, Report of Changes to Palisades Nuclear Plant Technical Specification Bases2023-03-0808 March 2023 Report of Changes to Palisades Nuclear Plant Technical Specification Bases PNP 2023-005, Response to Palisades Nuclear Plant - Request for Additional Information Related to the Post-Shutdown Decommissioning Activities Report2023-03-0101 March 2023 Response to Palisades Nuclear Plant - Request for Additional Information Related to the Post-Shutdown Decommissioning Activities Report ML22361A1022023-02-24024 February 2023 Reactor Decommissioning Branch Project Management Changes for Some Decommissioning Facilities and Establishment of Backup Project Manager for All Decommissioning Facilities ML23052A1092023-02-17017 February 2023 FEMA Letter to NRC, Proposed Commission Paper Language for Palisades Nuclear Plant Emergency Plan Decommissioning Exemption Request ML23032A3992023-02-0101 February 2023 Regulatory Path to Reauthorize Power Operations IR 05000255/20220032022-12-28028 December 2022 NRC Inspection Report No. 05000255/2022003(DRSS); 07200007/2022001 (Drss) Holtec Decommissioning International, LLC, Palisades Nuclear Plant L-22-042, Oyster, Pilgrim, Indian Point, Palisades and Big Rock Point - Proof of Financial Protection 10 CFR 140.152022-12-14014 December 2022 Oyster, Pilgrim, Indian Point, Palisades and Big Rock Point - Proof of Financial Protection 10 CFR 140.15 PNP 2022-037, Report of Changes to Security Plan, Revision 192022-12-14014 December 2022 Report of Changes to Security Plan, Revision 19 ML22321A2852022-11-17017 November 2022 LLC Master Decommissioning Trust Agreement for Palisades Nuclear Plant IR 05000255/20224012022-11-0909 November 2022 Decommissioning Palisades Nuclear Plant - Decommissioning Security Inspection Report 05000255/2022401 PNP 2022-036, Response to Request for Additional Information Regarding License Amendment Request for Proposed Permanently Defueled Emergency Plan and Permanently Defueled Emergency Action Level Scheme2022-11-0808 November 2022 Response to Request for Additional Information Regarding License Amendment Request for Proposed Permanently Defueled Emergency Plan and Permanently Defueled Emergency Action Level Scheme PNP 2022-035, International - Notification of Commitment Cancellations for Remaining Activities Related to Beyond-Design-Basis Seismic Hazard Reevaluations2022-11-0202 November 2022 International - Notification of Commitment Cancellations for Remaining Activities Related to Beyond-Design-Basis Seismic Hazard Reevaluations PNP 2022-024, Request for Exemption from 10 CFR 140.11(a)(4) Concerning Primary and Secondary Liability Insurance2022-10-26026 October 2022 Request for Exemption from 10 CFR 140.11(a)(4) Concerning Primary and Secondary Liability Insurance PNP 2022-026, Request for Exemption from 10 CFR 50.54(w)(1) Concerning Onsite Property Damage Insurance2022-10-26026 October 2022 Request for Exemption from 10 CFR 50.54(w)(1) Concerning Onsite Property Damage Insurance ML22292A2572022-10-25025 October 2022 Permanently Defueled Emergency Plan License Amendment RAI Letter 2024-01-23
[Table view] Category:Request for Additional Information (RAI)
MONTHYEARML23354A2602023-12-21021 December 2023 Reference Simulator Inspection Request for Information ML23055A1542023-02-24024 February 2023 Attachment: Request for Additional Information on the Palisades PSDAR ML22292A2582022-10-31031 October 2022 PDEP-EAL Amendment RAI ML22102A2482022-04-14014 April 2022 Request for Additional Information Regarding License Amendment Request for Permanently Defueled Technical Specifications ML21274A4172021-10-0505 October 2021 Request for Information for an NRC Triennial Heat Exchanger/Sink Performance Inspection and Request for Information Inspection Report 05000255/2021004 ML21028A4092021-01-27027 January 2021 NRR E-mail Capture - Palisades Nuclear Plant - Acceptance of Holtec Exemption Request from 10CFR50.82(a)(8)(i)(A) and 10CFR50.75(h)(1)(iv) ML21028A0552021-01-27027 January 2021 NRR E-mail Capture - Palisades Nuclear Plant - Acceptance of License Transfer Application ML20272A0112020-09-26026 September 2020 Request for Additional Information - Palisades Relief Request RR 5-8 (Proposed Alternative) for Reactor Pressure Vessel Head Penetration Repairs ML20133K0562020-05-14014 May 2020 Information Request to Support the NRC Annual Baseline Emergency Action Level and Emergency Plan Changes Inspection ML19357A2752019-12-23023 December 2019 Request for Information for an NRC Triennial Baseline Design Bases Assurance Inspection (Team); Inspection Report 05000255/2020011 ML19226A2932019-08-14014 August 2019 NRR E-mail Capture - Request for Additional Information Re License Amendment Request to Adopt TSTF-425, Revision 3 for the Palisades Nuclear Plant ML19226A2922019-08-0505 August 2019 NRR E-mail Capture - Draft Request for Additional Information for Palisades License Amendment Request to Adopt TSTF-425 ML19122A4852019-04-29029 April 2019 NRR E-mail Capture - Request for Additional Information for Palisades License Amendment Request to Revise License Conditions Related to NFPA 805 Modifications ML19009A5392019-01-0909 January 2019 NRR E-mail Capture - Request for Additional Information for Palisades License Amendment Request to Revise Emergency Diesel Generator Degraded Voltage Surveillance Requirement 3.3.5.2a ML19009A5382018-12-12012 December 2018 NRR E-mail Capture - Draft Request for Additional Information for Palisades License Amendment Request to Revise Emergency Diesel Generator Degraded Voltage Surveillance Requirement 3.3.5.2a ML18337A1382018-11-30030 November 2018 NRR E-mail Capture - Request for Additional Information Related to Palisades Relief Request Number RR 5-7 ML18337A1402018-11-29029 November 2018 NRR E-mail Capture - Draft Request for Additional Information Related to Palisades Relief Request 5-7 ML18309A1342018-11-0808 November 2018 Supplemental Information Needed for Acceptance or Requested Licensing Action Amendment Request to Revise Technical Specifications to Adopt TSTF-425, Revision 3 ML18094B0922018-04-0505 April 2018 Enclosurequest for Additional Information (Letter to B. S. Ford RAI Regarding Entergy Operations, Inc.'S Decommissioning Funding Plan Update for ISFSI Docket Nos.: 72-43, 72-51, 72-1044, 72-07, 72-12, and 72-59) ML18081A2962018-03-22022 March 2018 NRR E-mail Capture - Palisades Nuclear Plant - Request for Additional Information Regarding Proposed Changes to Site Emergency Plan for Permanently Defueled Condition (CAC MG0198: EPID L-2017-LLA-0305) ML18059A8202018-02-28028 February 2018 NRR E-mail Capture - Palisades Nuclear Plant - Request for Additional Information Regarding Proposed Alternative for Relevant Condition ML17335A1042017-11-30030 November 2017 NRR E-mail Capture - Palisades Nuclear Plant - RAI Regarding Proposed Changes to Administrative Controls Section of the Technical Specifications for Permanently Defueled Condition (CAC MG0021; EPID L-2017-LLA-0266) ML17118A3342017-04-18018 April 2017 E-Mailed Request for Information Dated 04/18/2017 for Palisades Nuclear Power Station, Unit 1, Inservice Inspection - Part B Items (Exf) ML17118A3312017-04-18018 April 2017 E-Mailed Request for Information Dated 04/18/17 for Palisades Nuclear Power Station, Unit 1, Inservice Inspection - Part a Items ML17072A2752017-03-10010 March 2017 NRR E-mail Capture - Palisades Nuclear Plant - Final Request for Additional Information Regarding Relief Request No. RR 4-25 ML16238A0302016-08-29029 August 2016 Supplemental Information Needed for Acceptance of Requested Licensing Action Control Rod Drive Exercise Surveillance ML16130A0762016-05-11011 May 2016 Request for Additional Information Regarding the License Amendment Request for Implementation of an Alternative Repair Criterion on the Steam Generator Tubes ML16013A0642016-01-13013 January 2016 NRR E-mail Capture - Request for Additional Information Entergy CNRO-2015-00023 - Revision to Entergy Quality Assurance Program Manual (Fleet Submittal CAC Nos. MF7086-MF7097) ML15341A1662015-12-0707 December 2015 NRR E-mail Capture - Entergy Fleet RR-EN-15-1, Request for Additional Information (CACs MF6341-MF6349) ML15258A2432015-09-0101 September 2015 NRC Supplement to NRC Letter - Notification of NRC Inspection and Request for Information Dated May 1, 2015 - Palisades Nuclear Plant ML15149A2462015-05-28028 May 2015 Information Request to Support NRC Annual Baseline Emergency Action Level and Emergency Plan Changes Inspection (Mxg) ML15072A2542015-03-19019 March 2015 Request for Additional Information Regarding the License Amendment Request to Implement 10 CFR 50.61a CNRO-2015-00008, Responses to NRC Request for Additional Information Regarding Change in Corporate Form of Entergy Nuclear Holding Company2015-02-18018 February 2015 Responses to NRC Request for Additional Information Regarding Change in Corporate Form of Entergy Nuclear Holding Company ML15022A1382015-01-22022 January 2015 E-Mail - Palisades Request for Information ML15016A1842015-01-20020 January 2015 Request for Additional Information Regarding the License Amendment Request to Implement 10 CFR 50.61a ML15012A3052015-01-15015 January 2015 Request for Additional Information Regarding the License Amendment Request for an Equivalent Margin Analysis Completed in Accordance with 10 CFR 50, Appendix G ML14318A4002014-12-17017 December 2014 Vermont Yankee Nuclear and Big Rock Point - Request for Additional Information Regarding Change in Corporate Form of Entergy Nuclear Holding Company (Tac Nos. MF3218 - MF3221) ML14157A3642014-06-0505 June 2014 CDBI Request for Information ML13353A0422013-12-16016 December 2013 NRR E-mail Capture - Request for Additional Information - Palisades - Proposed Revision to Palisades Site Emergency Plan (SEP) Emergency Response Organization (ERO) MF2321 ML13312A4232013-11-26026 November 2013 Interim Staff Evaluation and Request for Additional Information Regarding the Overall Integrated Plan for Implementation of Order EA-12-051, Reliable Spent Fuel Pool Instrumentation ML13179A4622013-07-0505 July 2013 Entergy Nuclear Operations, Inc., Decommissioning Funding Status Report Request for Additional Information Regarding the Decommissioning Funding Status Report ML13051A7772013-02-19019 February 2013 Request for Additional Information, 2012 SG Inspection Report ML12314A4222012-11-0808 November 2012 ME8074 - Request for Additional Information Regarding Replacement of Spent Fuel Pool Region I Storage Racks ML12278A3862012-10-0404 October 2012 ANO 1 & 2, Big Rock, FitzPatrick, GGNS, Indian Point 1, 2, and 3, Palisades, Pilgrim, RBS, Vermont Yankee, and Waterford, Request for Additional Information, Round 2, Amendment Request to Revise QA Program Manual and Staff Qualification TSs ML12206A4042012-07-24024 July 2012 Request for Additional Information (Revised) - Palisades - SFP Rerack LAR - ME8074 ML12206A3322012-07-19019 July 2012 E-mail Combined Request for Additional Information for Several Branches of NRR for the Submittal on Palisades re-sack LAR ML12121A7032012-04-27027 April 2012 Relief Request - Proposed Alternative - Use of Alternate ASME Code Case N-770-1 Baseline Examination - ME8492 ML1209604492012-04-0505 April 2012 ANO 1 & 2, Big Rock, FitzPatrick, GGNS, Indian Point 1, 2 & 3, Palisades, Pilgrim, RBS, Vermont Yankee, and Waterford - Request for Additional Information, Revise Quality Assurance Program Manual and Staff Qualification Technical Specificat ML12068A3882012-04-0202 April 2012 Request for Additional Information Regarding License Renewal Commitment to Submit Alloy 600 Program ML12056A0492012-03-12012 March 2012 Enclosure 3 - Recommendation 2.3: Seismic 2023-02-24
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July 29, 2005 Mr. Paul A. Harden Site Vice President Nuclear Management Company, LLC Palisades Nuclear Plant 27780 Blue Star Memorial Highway Covert, MI 49043-9530
SUBJECT:
PALISADES PLANT REQUEST FOR ADDITIONAL INFORMATION RELATED TO LICENSE AMENDMENT REQUEST FOR ONE-TIME EXTENSION TO THE TECHNICAL SPECIFICATION ACTION COMPLETION TIME FOR RESTORING A SERVICE WATER TRAIN TO OPERABLE STATUS (TAC NO. MC6544)
Dear Mr. Harden:
Nuclear Management Company, LLCs (NMCs) letter of May 26, 2005, submitted a supplement to its license amendment request of April 1, 2005, for a one-time extension to the technical specification action completion time for restoring a service water train to operable status. The Nuclear Regulatory Commission staff is reviewing your request and finds that additional information is needed as shown in the enclosed request for additional information (RAI).
I discussed the enclosed RAI with Ms. Amy Hazelhoff of your organization on June 23, 2005, and she agreed to respond by August 31, 2005. Please contact me at (301) 415-1423 if you have questions.
Sincerely,
/RA/
L. Mark Padovan, Project Manager, Section 1 Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-255
Enclosure:
RAI cc w/encl: See next page
July 29, 2005 Mr. Paul A. Harden Site Vice President Nuclear Management Company, LLC Palisades Nuclear Plant 27780 Blue Star Memorial Highway Covert, MI 49043-9530
SUBJECT:
PALISADES PLANT REQUEST FOR ADDITIONAL INFORMATION RELATED TO LICENSE AMENDMENT REQUEST FOR ONE-TIME EXTENSION TO THE TECHNICAL SPECIFICATION ACTION COMPLETION TIME FOR RESTORING A SERVICE WATER TRAIN TO OPERABLE STATUS (TAC NO. MC6544)
Dear Mr. Harden:
Nuclear Management Company, LLCs (NMCs) letter of May 26, 2005, submitted a supplement to its license amendment request of April 1, 2005, for a one-time extension to the technical specification action completion time for restoring a service water train to operable status. The Nuclear Regulatory Commission staff is reviewing your request and finds that additional information is needed as shown in the enclosed request for additional information (RAI).
I discussed the enclosed RAI with Ms. Amy Hazelhoff of your organization on June 23, 2005, and she agreed to respond by August 31, 2005. Please contact me at (301) 415-1423 if you have questions.
Sincerely,
/RA/
L. Mark Padovan, Project Manager, Section 1 Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-255
Enclosure:
RAI cc w/encl: See next page DISTRIBUTION PUBLIC OGC LRaghavan DLPMDPR EDuncan, RGN-III PDIII-1 Reading ACRS LPadovan THarris ADAMS Accession Number: ML052070776 OFFICE PDIII-1/PM PDIII-1/LA PDIII-1/SC NAME LPadovan THarris LRaghavan DATE 7/29/05 7/29/05 7/29/05 OFFICIAL RECORD COPY
Palisades Plant cc:
Robert A. Fenech, Senior Vice President Director of Nuclear Assets Nuclear, Fossil, and Hydro Operations Consumers Energy Company Consumers Energy Company Palisades Nuclear Plant 1945 Parnall Rd. 27780 Blue Star Memorial Highway Jackson, MI 49201 Covert, MI 49043 Arunas T. Udrys, Esquire John Paul Cowan Consumers Energy Company Executive Vice President & Chief Nuclear 1 Energy Plaza Officer Jackson, MI 49201 Nuclear Management Company, LLC 700 First Street Regional Administrator, Region III Hudson, WI 54016 U.S. Nuclear Regulatory Commission 801 Warrenville Road Jonathan Rogoff, Esquire Lisle, IL 60532-4351 Vice President, Counsel & Secretary Nuclear Management Company, LLC Supervisor 700 First Street Covert Township Hudson, WI 54016 P. O. Box 35 Covert, MI 49043 Douglas E. Cooper Senior Vice President - Group Operations Office of the Governor Palisades Nuclear Plant P. O. Box 30013 Nuclear Management Company, LLC Lansing, MI 48909 27780 Blue Star Memorial Highway Covert, MI 49043 U.S. Nuclear Regulatory Commission Resident Inspector's Office Stephen T. Wawro, Director Palisades Plant of Nuclear Assets 27782 Blue Star Memorial Highway Consumers Energy Company Covert, MI 49043 Palisades Nuclear Plant 27780 Blue Star Memorial Highway Michigan Department of Environmental Quality Covert, MI 49043 Waste and Hazardous Materials Division Hazardous Waste and Radiological Laurie A. Lahti, Manager Protection Section Regulatory Affairs Nuclear Facilities Unit Nuclear Management Company, LLC Constitution Hall, Lower-Level North Palisades Nuclear Plant 525 West Allegan Street 27780 Blue Star Memorial Highway P.O. Box 30241 Covert, MI 49043 Lansing, MI 48909-7741 Michigan Department of Attorney General Special Litigation Division 525 West Ottawa St.
Sixth Floor, G. Mennen Williams Building Lansing, MI 48913
Request for Additional Information Palisades Nuclear Plant, Docket No. 50-255 License Amendment Request: One-time Extension to Technical Specification Action Completion Time for Restoration of a Service Water Train to Operable Status Risk Assessment
- 1. Nuclear Management Companys (NMCs) letter of May 26, 2005, provided an estimated increase in core damage frequency (CDF) and large early release frequency (LERF) from this one-time service water (SW) Completion Time (CT) extension. Please provide the following information:
- a. Describe how NMC calculated the increases in CDF and LERF. Specifically, what probabilistic risk assessment (PRA) model parameters were changed, and by how much? For example, were the 168 hours0.00194 days <br />0.0467 hours <br />2.777778e-4 weeks <br />6.3924e-5 months <br /> added to the average test and maintenance for a cycle, a year, or some other period? Discuss the basis for the method used, and any assumptions used.
- b. How was the benefit of the compensatory measures calculated? Provide the following:
(1) which compensatory measures were quantified (2) brief description of how they were modeled (3) failure probability of each
- 2. NMCs letter of April 1, 2005, provided an estimate of the incremental conditional core damage probability (ICCDP) and incremental conditional large early release probability (ICLERP) for this one-time SW CT extension. Please provide the following information:
- a. Was credit for compensatory measures used in the calculation of these metrics?
- b. If yes, please provide the ICCDP and ICLERP without credit for the compensatory measures.
- 3. NMCs April 1, 2005, submittal states: "One hundred percent of the required SWS [service water system] post accident cooling capability can be provided by any two SWS pumps if SWS flow, either to the non-critical header or to the critical loads inside the containment, is capable of being isolated. One hundred percent of the required SWS post accident cooling capability can be provided by any one SWS pump if SWS flow, both to the non-critical header and to the critical loads inside the containment, are capable of being isolated." The qualitative assessment of seismic risk states that the SWS is important to provide auxiliary feedwater (AFW) pump P-8C with a suction source.
Enclosure
- a. How many SW pumps are required for seismic scenarios where the SWS is needed to supply a suction source for AFW pump P-8C, assuming SWS flow to the non-critical header, or to the critical loads inside the containment, is isolated? If greater than two, how did NMC factor this into the risk assessment?
- b. How many SW pumps are required for seismic scenarios where the SWS is needed to supply a suction source for AFW pump P-8C, assuming SWS flow to the non-critical header, and to the critical loads inside the containment, is isolated? If greater than one, how was this factored into the risk assessment?
- 4. The seismic risk discussion in NMCs letter of May 26, 2005, concludes that removing P-7C from service for the extended CT would not result in a significant change in the individual plant examination of external events results, and would not have a significant impact on the calculated delta CDF or LERF. Apparently, NMC considered only seismic scenarios where the SWS is needed to supply a suction source for AFW pump P-8C.
- a. Please provide an estimate of the change in risk from these scenarios when SW pump P-7C is out of service, or otherwise demonstrate that this change in risk is small.
- b. Are these the only seismic scenarios that are expected to be adversely impacted when SW pump P-7C is out of service? If "no," please provide an estimate of the change in risk from these scenarios when SW pump P-7C is out of service, or otherwise demonstrate that this change in risk is small for the other seismic scenarios.
PRA Model Scope and Quality
- 1. Attachment 1 to NMCs letter of May 26, 2005, listed the Level A peer review findings and their resolution. Attachment 2 listed Level B peer review findings remaining to be resolved.
Please provide a listing of the resolved Level B peer review findings along with how they were resolved (in similar format to Attachment 1 of NMCs letter of May 26, 2005).
- 2. NMCs letter of May 26, 2005, provided the resolution of the PRA peer review comments.
Combustion Engineering Owners Group fact and observation, PEER-2000 AS-09 emergency diesel generator (EDG) repair, stated that the PRA model included repair of an out-of-service EDG, including support system failures. Service water is a support system for the Palisades EDGs. Does the current Palisades PRA model credit repair or recovery of service water? If yes, please provide information on the following:
- a. What is the CDF, LERF, increase in CDF, and increase in LERF for the extended SW CT assuming no recovery or repair is credited for an out-of-service SW pump?
- b. Calculate the ICCDP and ICLERP for the extended SW CT assuming no recovery or repair is credited for an out-of-service SW pump.
- c. Describe how service water recovery or repair is credited in the 10 CFR 50.65 (a)(4) risk assessment when the plant configuration includes an out-of-service SW pump or train.