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 Briefin g gOmaha Public Power DistrictFort 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

• CurrentLicensingBasis(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

-NoHemycorMT-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 b y 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

-Remainin g RAs are Defense-in-De p th g p*Sustain Mode 3, Hot Shutdown, per FCS Technical Specifications

• Defines Safe and Stable

• 24 hours 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 a pproach for p ro grampppg-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

• Pumpfirefrequency 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 riskMRlGid1174Rii1

-M eets R egu latory G u id e 1.174 , R ev i s i on 1*Modifications and Implementation Actions

-Compliance with NFPA 805 18 18