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MONTHYEARML16027A0792016-02-0202 February 2016 Meeting Slides for 2/2/16 Teleconference with Omaha Public Power District - License Amendment Request (Lar), Proposed Changes to Implementation of NFPA 805 (2001 Edition) at Fort Calhoun Station Project stage: Meeting ML16036A3502016-02-23023 February 2016 2/3/16 Summary of Teleconference Meeting with Omaha Public Power District to Discuss Proposed Request to Revise Table S-2, Plant Modifications Committed, for the NFPA 805 Amendment Issued 6/16/14 for Fort Calhoun Station, Unit 1 Project stage: Meeting 2016-02-02
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Category:Meeting Briefing Package/Handouts
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[Table view] Category:Slides and Viewgraphs
MONTHYEARML22222A1112022-07-28028 July 2022 2022 Kmkt Fort Calhoun Flood Finding and 2011 Missouri River Flooding Reduce ML20080M1542020-02-21021 February 2020 PFHA-2020-3B-2-George-Fort-Calhoun-2011-compressed ML20080M1582020-02-21021 February 2020 PFHA-2020-3B-3-Vossmar_Stafford-2019_CNS_FCS_Flooding ADAMS Version ML20022A0262020-01-22022 January 2020 NEI Presentation Status Update for Ropte Short Term Action Plan: Removed Planned Unavailability for Mitigating Systems Performance Index ML19070A3072018-11-28028 November 2018 FCS Partial Site Release Meeting Summary ML19070A2462018-11-28028 November 2018 OPPD Presentation on Fort Calhoun Station Request for Partial Site Release ML17160A3842017-05-31031 May 2017 Public Meeting, May 31, 2017 Region IV Slides Fort Calhoun PSDAR ML16291A0192016-10-17017 October 2016 OPPD Pre-Submittal Meeting Regarding Fort Calhoun Station Decommissioning October 18, 2016 ML16027A0792016-02-0202 February 2016 Meeting Slides for 2/2/16 Teleconference with Omaha Public Power District - License Amendment Request (Lar), Proposed Changes to Implementation of NFPA 805 (2001 Edition) at Fort Calhoun Station ML15114A3962015-04-23023 April 2015 Licensee Slides - 4/23/15 Public Meeting, License Amendment Request for Use of Ansi/Ans 58.14 ML15114A3862015-04-23023 April 2015 Licensee Slides - 4/23/15 Public Meeting, License Amendment Request for Class I Structures ML15105A4702015-04-15015 April 2015 Summary of Category 1 Meeting Between NRC and Omaha Public Power District to Discuss Transition to the Normal Reactor Oversight Process and Actions for Continued Sustained Performance Improvements ML14338A6252014-12-0202 December 2014 Oppd'S Fort Calhoun Station Driving to Excellence, Public Meeting with the U.S. Nuclear Regulatory Commission Containment Internal Structures 12/2/201 ML14149A0742014-05-30030 May 2014 5/22/14 Meeting Handouts - Meeting with OPPD and NPPD to Discuss Flooding Hazard Reevaluation Extension Requests for Fort Calhoun Station and Cooper Nuclear Station - Response to Question 1 Part 2 ML14143A2892014-05-23023 May 2014 May 13, 2014 Summary of Meeting with Omaha Public Power District Presented the Status of Inspection Manual Chapter 0350 Oversight Activities at Fort Calhoun Station ML14129A1492014-05-0909 May 2014 Station/Cooper Nuclear Station - Meeting Slide for Flood Hazard Reevaluation Report Schedule Extension Review ML14065A2532014-03-0505 March 2014 Summary of Category 1 Public Meeting with Omaha Public Power District to Discuss Status of Oversight Activities at Fort Calhoun Station ML13339A7242013-12-0505 December 2013 Meeting Summary Slides ML13239A1032013-08-27027 August 2013 2013-08-27 Region IV Visit Final Presentation ML13220A7792013-08-0808 August 2013 Summary of July 24, 2013 Meeting with Omaha Public Power District ML13144A7762013-05-24024 May 2013 Summary of Meeting with Omaha Public Power District on Preliminary Results of a Manual Chapter 0350 Team Inspection ML13112A0522013-04-22022 April 2013 Meeting Handouts April 22, 2013 Meeting with Omaha Public Power District to Discuss Potential Fort Calhoun Licensing Actions ML13114A9362013-04-22022 April 2013 Redacted Meeting Handouts from Closed April 22, 2013 Meeting with Omaha Public Power District to Discuss Means for Protecting Fort Calhoun Station, Unit 1, Against Flooding ML13093A4732013-04-0303 April 2013 Summary of Meeting with Omaha Public Power District ML13008A3672013-01-0808 January 2013 Briefing on Fort Calhoun Station, January 8, 2013 ML12338A1912012-12-0303 December 2012 Meeting Summary with Omaha Public Power District to Discuss Update of Issues and Oversight Activities at Fort Calhoun Station ML12311A0492012-09-18018 September 2012 Part 26 Public Meeting NEI Presentation Slides ML12258A0502012-09-10010 September 2012 G20120458/EDATS: OEDO-2012-0390 - Wallace L. Taylor Ltr. 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[Table view] |
Text
License Amendment Request (LAR),
Proposed Changes to Implementation of NFPA 805 (2001 Edition) at Fort Calhoun Station February 2, 2016
Introductions
- Brad Blome - Manager-Site Regulatory Assurance
- Mike Edwards - Regulatory Assurance
- Tim Leibel - Design Engineering
- Steve Odell - Westinghouse
- Clarence Worrell - Westinghouse 2
Agenda
- Applicable Recommendations
NFPA 805 Requirements
- Deterministic Compliance on a Fire Area by Fire Area basis
- Performance Based Compliance for Fire Areas not meeting Deterministic Compliance (i.e., Variance From Deterministic Requirements, VFDR)
FCS License Condition
- Transition License Condition 3.D.(3)(b) states:
The licensee shall implement the modifications to its facility, as described in Enclosure 1, Attachment S, Table S-2, "Plant Modifications Committed," of OPPD letter LIC-14-0042 dated April 10, 2014, to complete the transition to full compliance with 10 CFR 50.48(c) by the end of the second refueling outage following issuance of the license amendment. The licensee shall maintain appropriate compensatory measures in place until completion of these modifications.
5
Applicable RECs
- REC-111, High Energy Arc Fault Shields above 4160V and 480V Switchgear
- REC-119 and REC-120, Addition of Isolation Fuses Between Battery No.1 (2) and Associated DC Bus 6
REC-111
- License Condition permits OPPD to make changes to REC-111 with formal notification of the changes provided to the NRC
- For REC-111, OPPD will remain within the Regulatory Guide (RG) 1.174 numerical acceptance guidelines applicable to NFPA 805 transition (i.e., those guidelines used for the NFPA 805 LAR and subsequent RAI responses) after implementing the proposed changes to REC-111 7
REC-137
- License Condition permits OPPD to make changes to REC-137 with formal notification of the changes provided to the NRC
- For REC-137 to satisfy the deterministic requirements of NFPA-805, analysis has been performed to demonstrate that the Condensate Storage Tank has adequate volume to support 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of safe and stable conditions following a fire event 8
REC-119 and REC-120
- REC-119 and REC-120 proposed electrical isolation between the station batteries and the associated DC buses. The need for the modification has been eliminated by revising the deterministic compliance to credit the unaffected train of DC power for safe and stable operation, therefore OPPD is requesting elimination of REC-119 and REC-120 through an LAR.
9
Licensing Approach
- REC-111 and REC-137 will be addressed with a formal letter notifying the NRC of changes from the original submittal. That letter will not require NRC approval.
- Changes to REC-119 and REC-120 will require NRC approval by an LAR proposing to remove REC-119 and REC-120 from Table S-2
- The LAR will document the changes to all four RECs by including an update of Table S-2
- Cumulative effect of risk from these changes will be included in the LAR 10
LAR Scope RECs 119 and 120
- For the applicable Fire Areas (Battery Rooms), compliance strategy has been revised to demonstrate areas are deterministically compliant without the need for either a modification or a VFDR
- Compliance demonstrated by crediting the unaffected DC bus for Safe and Stable conditions
- The NFPA 805 NSCA incorporated (conceptually) the risk related modifications to reflect post implementation. However, in support of the original NFPA 805 LAR submittal, (EA10-036) verified that the battery rooms would remain deterministically compliant even without the impact of the modifications.
11
PRA Model Supporting this LAR/
Notification Letter
- Integrated final resolution of RAIs regarding fire PRA method acceptability for the transition and for the self-approval process
- Updated fire PRA model to use Rev. 13 of Internal Events PRA (original LAR used Rev. 11)
- Incorporated plant design changes 12
PRA Results
- Only battery room fire scenarios are affected by REC-119 and REC-120
- No VFDRs associated with the battery room fires
- Risk from changes associated with REC-111 will be included in total CDF and LERF to demonstrate compliance to RG 1.174 guidelines
- REC-137 does not have a calculated risk impact as it is not credited or otherwise modeled by the Fire PRA
- Total CDF and LERF across all modeled hazards will remain within RG 1.174 guidelines (<1.0E-04 /yr CDF and <1.0E-05 /yr LERF) 13
PRA Results (cont.)
14
PRA Results (cont.)
- SE fire PRA conservatively assumed a battery room fire would cause Loss of Offsite Power (LOOP) due to de-energizing instrument busses and subsequent Offsite Power Low Signal (OPLS) generation
- The model used for this LAR credits the automatic transfer of the instrument bus power supplies to their bypass power supplies, precluding an OPLS and LOOP
- This improved modeling significantly reduced the risk benefit of REC-119/120 15
Conclusions
- The Fire Areas associated with RECs 119 and 120 are deterministically compliant without crediting the modification or VFDR
- With the modifications originally associated with RECs 119 and 120 removed from the model, the total CDF and LERF across all modeled hazards will remain within RG 1.174 guidelines. This will include the effects associated with the changes to REC-111.
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Schedule
- Submittal of Notification Letter in mid-February 2016
- Submittal of LAR in mid-March 2016
- Request NRC approval by October 1, 2016 17