ML111570296
| ML111570296 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 05/26/2011 |
| From: | Omaha Public Power District |
| To: | Lynnea Wilkins Plant Licensing Branch IV |
| Wilkins, L E, NRR/DORL/LPL4, 415-1377 | |
| References | |
| Download: ML111570296 (18) | |
Text
Nuclear Regulatory Commission NFPA 805 Fire Protection Transition Pre-Submittal Briefing Omaha Public Power District Fort Calhoun Nuclear Station 5/26/11
Introductions
- Omaha Public Power District
- Joe McManis - Manager Projects
- Tom Shudak - Sr. Engineer Programs
- Gaston Riva - Sr. Engineer Systems Analysis
- Bill Hansher - Supervisor Nuclear Licensing
- Donna Lippy - Sr. Nuclear Licensing Engineer
- Engineering Planning and Management
- Francesco Pellizzari - Project Manager
- Westinghouse Electric Company
- Gerhard Samide - Project Manager
- Clarence Worrell - WEC Fire Risk Services Team 2
2
Agenda
- Current Fire Protection Licensing Basis
- NFPA 805 Transition Project Overview
- Fire Protection Program Transition
- Compliance with NFPA 805
- Summary 3
3
Current Fire Protection Licensing Basis
- Fort Calhoun Station
- Single Unit PWR 1500 MWt Combustion Engineering
- Licensed to operate August 9, 1973
- Current Licensing Basis (CLB):
- Current Licensing Basis (CLB):
- 10 CFR 50 Section 50.48 (a) and (b)
- 10 CFR 50 Appendix A General Design Criteria (GDC) 3
- 10 CFR 50 Appendix R Sections III.G, III.J and III.O
- Appendix A to Nuclear Regulatory Commission (NRC) Branch Technical Position (BTP) APCSB 9.5-1
- Renewed Facility Operating License (OL) No. DPR-40 4
4
NFPA 805 Transition Project Overview
- Date committed to transition - June 9, 2008
- Submittal date - June 9, 2011
- License Amendment Request (LAR) - In final stages of assembly
- Plan a complete submittal 5
5
Fire Protection Program Transition
- License Condition being revised
- Technical Specification(s) being revised
- Reviewed regulatory orders and exemptions
- Transition majority of exemptions with clarifications 6
6
Fire Protection Program Transition
- Determined no significant hazards
- Implement 18 months after receipt of safety evaluation report
- Modifications completed within two refueling outages after receipt of safety evaluation report 7
7
Compliance with NFPA 805
- NFPA 805 Chapter 3 compliance
- Performance-based methods applied
- Request approval of pyrocrete barrier
- Non-Power Operations per FAQ 07-0040
- Radioactive release per FAQ 09-0056 8
8
Compliance with NFPA 805
- Nuclear Safety Capability Assessment
- Fire Area by Fire Area review y
- Multiple Spurious Operations review for impact on deterministic requirements 9
9
Compliance with NFPA 805
- Nuclear Safety Capability Assessment
- Result:
Result:
- 54 Fire Areas
- 42 Assessed Deterministic
- 12 Assessed Performance-based 10 10
Compliance with NFPA 805
- Recovery Action (RA) Feasibility Assessment
- Control Room RAs credited for Risk Reduction
- Remaining RAs are Defense-in-Depth g
p
- Sustain Mode 3, Hot Shutdown, per FCS Technical Specifications
- Defines Safe and Stable
- 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 11 11
Compliance with NFPA 805
- Modifications
- Recover or ensure the availability of Offsite Power
- Minimize or eliminate Variances from Deterministic Requirements (VFDR)
- Typical Modification
- Electrical Isolation
- Cable re-routing 12 12
Compliance with NFPA 805
- Monitoring
- Following Draft FAQ 10-0059
- Phased approach for program pp p
g
- Screening criteria to determine risk significant fire compartments using:
- Risk Achievement Worth and either
- Core Damage Frequency or
Fire Probabilistic Risk Assessment
- Fire PRA built using NUREG/CR-6850 & Supp 1
- Peer review complete
- No major technical issues
- Documentation
- Modeling enhancements
- Facts & Observations (F&O)
- 50% Suggestions
- F&Os resolved 14 14
Fire Probabilistic Risk Assessment
- NUREG/CR-6850 alternative treatments:
- Severity factor / non-suppression probability for electrical cabinets
- Pump fire frequency
- Diesel Generator severity factor / non-suppression probability
- Realism and focus on risk significant attributes
- Aligns with operating experience 15 15
Fire Probabilistic Risk Assessment
- Severity factor / non-suppression probability for electrical cabinets
- In review by Industry New Methods Peer Review Panel
- Pump fire frequency Pump fire frequency
- To be superseded by pump fire frequency method currently in review by Panel
- Diesel Generator severity factor / non-suppression probability
- To be submitted to Panel by June 9, 2011.
16 16
Fire Probabilistic Risk Assessment
- Draft FAQ 08-0050 Non-Suppression Probability
- Available version when FPRA task being performed
- Current version does not impact conclusions
Summary
- Fire Risk Evaluations
- Recovery Actions have no adverse impact
- Net change in risk M
R l
G id 1 174 R i i 1
- Meets Regulatory Guide 1.174, Revision 1
- Modifications and Implementation Actions
- Compliance with NFPA 805 18 18