ML111570296

Licensee Slides from 5/26/11 Pre-Submittal Meeting to Discuss NFPA 805 Fire Protections

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 Briefingg 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

• Fire Probabilistic Risk Assessment

• 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):

- 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

- No Hemyc or MT

- 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 byy Fire Area review

- Multiple Spurious Operations review for impact on deterministic requirements 9

9

Compliance with NFPA 805

• Nuclear Safety Capability Assessment

- 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

- Remainingg RAs are Defense-in-Depth 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 pp for p program g

- Screening criteria to determine risk significant fire compartments using:

• Risk Achievement Worth and either

• Core Damage Frequency or

• Large Early Release Frequency 13 13

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

- 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

• Low frequency of fire events where FCS Fire PRA credits manual suppression 17 17

Summary

• Fire Risk Evaluations

- Recovery Actions have no adverse impact

• Net change in risk

- Meets M R Regulatory l G Guide id 11.174, 174 RRevision ii 1

• Modifications and Implementation Actions

- Compliance with NFPA 805 18 18