ML20147J246

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Summary of 970331 Meeting W/Util to Discuss IPEEE Rept Re Internal Fire Vulnerabilities That Indicated IPEEE CDF of 5E-03.List of Attendees Encl
ML20147J246
Person / Time
Site: Quad Cities  Constellation icon.png
Issue date: 04/10/1997
From: Pulsifer R
NRC (Affiliation Not Assigned)
To:
NRC (Affiliation Not Assigned)
References
NUDOCS 9704110158
Download: ML20147J246 (32)
v • d • e


Text

. . .__. _ __ -_ __ _.

TSCS

.rq April 10, 1997 ,

. LICENSEE: Commonwealth Edison Company (Comed)

FACILITIES: Quad Cities Nuclear Power' Station, Units 1 and 2

SUBJECT:

SUMMARY

Of MEETING CONCERNING THE QUAD CITIES IPEEE o

On March 31, 1997, the staff met with Comed to discuss the Individual Plant Examination of External Events (IPEEE) report submitted by Quad Cities on february 17, 1997. This report had identified internal fire vulnerabilities that indicated an IPEEE core damage frequency (CDf) of SE-03. A list of attendees is provided as Enclosure 1.

The objective of the meeting was for Comed to discuss with the staff the potential vulnerabilities and corrective actions identified in the fire protection and post-fire safe shutdown programs and procedures for Quad Cities, Units 1 and 2, during preparation of the IPEEE. Implications for i Dresden Station, Units 2 and 3, were also discussed. A copy of the licensco's presentation is included as Enclosure 2.

The licensco provided clarification of their evaluation including the methodology, risk reduction task force, event tree analysis and their action plan schedule. Clarification was also provided for the Interim Alternate Shutdown Method (IASM) which has been implemented at Unit 1. Comed provided a brief summary of the fire IPEEE similarities and differences between Quad Cities and Dresden Stations.

Based upon the results of the meeting, Comed was requested to submit two letters to the NRC: 1) provide the rationale and basis as to why its acceptable to wait until November 1997 before coming to resolution of the IPEEE concerns at Quad Cities, and 7) explain why Dresden fire protection vulnerabl11tles differ from Quad Cities. The staff will complete a more extensive review of Quad Cities IPEEE by proceeding with a Level 2 evaluation.

ORIGINAL SIGNP.D llY:

Robert M. Pulsifer, Project Manager Project Directorate 111-2  ;

e i\ Q'3 D Division of Reactor Projects - lil/IV Office of Nuclear Reactor Regulation Docket Nos. 50-254 and 50-265 l

Enclosures:

1. List of Attendees
2. Licensee's Presentation hfD i cc w/encis
see next page hh I Q.ist ribut1RD: on next page g l DOCUMENT NAME: QUAD \lPEEE. SUM ,

l T,,,mw. e copy as ibie sacumoni. indicei.f tn4he boa: "C" = Copy without enclosuree *E' = Copy with encloeu,ee "N' a No copy l I OfflCE PM:PDill-2 i c- LA':IQlij-2 C D:PDill-2 le l l l- NAME R. PULS16M ~ C( M0lt R. CAPRA/tv l DAll 04/f*/97 04 7 /97 04/se /97 i OfflCIAL RECORD COPY 9704110150 970410 7 PDR ADOCK 050002D4 P PDH

SUBJECT:

~

SUMMARY

OF MEETING CONCERNIN,1 THE QUAD' CITIES IPEEE-Di st rib'at' on:

DecketM e'; T663 MSLIC ' <

i PDIII-2 R/F '

OGC 015818 >

ACRS T2E26 ,

.W. Kropp' ,

R. Pulsifer E-Mail

!- S. Collins SJCl- ,

F..Miraglia FJM R. Zimmerman RPZ

~J. . Roe. JWR .

'E. Adensam'EGAl-

, R. Capra RACl. -

C.' Moore ACM

-D. Ross SAM B..McCabe BCM i J. Schiffgens JOS

0. O'Neal DM0 -

R.-Hernan RWH E. Conne11'EAC S. West KSW

, L. Marsh LBM  ;

P. Madden'PMM -

A. Thadani'ACT l H. Ornstein HLO M.'Cunningham MAC3- l A. Busiik ABJ 1 H. Vandermolen HJV J. T. Chen JTC J. Flack JHF .

M. Salley MXS3 I

-J. Houghton JRH2 i M. Dey MKD 1 J. Stang JFS2 l

.J. Hyslop JSH2 )

)

l l

I i

i

Quad Cities Nuclear Power Station Unit Nos. I and 2

. cc:

Ms. I. Johnson Brent E. Gale, Esq.

. Acting Manager, Nuclear Regulatory Services Vice President - Law and Commonwealth Edison Company . Regulatory Affairs Executive Towers West III MidAmerican Energy Company 1400 Opus Place, Suite 500 One RiverCenter Place Downers Grove, Illinois 60515 106 East Second Street P.O. Box 4350 Michael I. Miller, Esquire Davenport, Iowa 52808 Sidley and Austin One First National Plaza Document Control Desk-Licensing Chicago, Illinois 60603 Commonwealth Edison Company 1400 Opus Place, Suite 400 Mr. L. William Pearce Downers Grove, Illinois 60515

Station Manager Quad Cities Nuclear Power Station 22710 206th Avenue North Cordova, Illinois 61242 U.S. Nuclear Regulatory Commission Quad Cities Resident Inspectors Office 22712 206th Avenue North Cordova, Illinois 61242 Chairman Rock Island County Board of Supervisors 1504 3rd Avenue Rock Island County Office Bldg.

Rock Island, Illinois 61201 Illinois Department of Nuclear Safety Office of Nuclear Facility Safety i 1035 Outer Park Drive Springfield, Illinois 62704 Regional Administrator U.S. NRC, Region III 801 Warrenville Road Lisle, Illinois 60532-4351 Richard J. Singer Manager - Nuclear MidAmerican Energy Company 907 Walnut Street L P.O. Box 657 1 l

Des Moines, Iowa 50303 l 1

1

o

. SbBJECT:

SUMMARY

OF MEETING CONCERNING THE QUAD CITIES-IPEEE  !

' Distribution:

Docket File  !

'PUBLIC. ]

, PDIII-2 R/F l OGC 015818 '

ACRS T2E26 W. Kropp R. Pulsifer E-Mail .

S. Collins SJC1 ,

F. Miraglia FJM' R. Zimmerman RPZ J. Roe JWR E. Adensam EGA1

'.R. Capra RAC1 C. Mocre ACM '

D. Ross SAM B. McCabe BCM J. Schiffgens JOS D. O'Neal DM0 R. Hernan RWH E. Connell EAC S. West KSW L. Marsh LBM P. Madden PMM A. Thadani ACT H. Ornstein HLO M. Cunningham MAC3 A. Busiik ABJ H. Vandermolen HJV J. T. Chen JTC J. Flack JHF M. Salley MXS3 J. Houghton JRH2 i M. Dey MKD J. Stang 'fS2 J. Hyslop JSH2

y - . .. ~. .. -- -- ...-- ...- -.-

., April'10, 1997=

l 1. , . LICENSEE:~ CommonwealthEdisonCompany)(Comed)

{

FACILITIES:  ; Quad Cities Nuclear Power Station, Units;l~and 2 l

SUBJECT:

' SUNiARY.0F MEETING CONCERNING THEl QUAD CITIES'IPEEE' l- .

i

-On March 31, 1997, the staff met with Comed to discuss the Individual Plant Examination of External' Events (IPEEE) report submitted by Quad Cities on- ,

February 17. 1997. This report had identified internal fire vulnerabilf ties that indicated =an IPEEE core damage frequency (CDF) of 5E-03. -A list of-'

attendees is provided as Enclosure 1.

" The_ objective of the meeting was for Comed to discuss with the staff the potential vulnerabilities and corrective actions identified in the fire '

i protection and post-fire safe shutdown programs and procedures for Quad

, Cities, Units 1 and 2, during preparation of the IPEEE. Implications for Dresden Station, Units 2 and 3, were also discussed. A copy of the licensee's

/- Lpresentation is included as Enclosure'2.

-The licensee provided clarification of.their evaluation including the

. methodology, risk reduction task force, event tree analysis and their action plan schedule. Clarification was also provided for the Interim Alternate '

Shutdown Method (IASM) which has been implemented at Unit 1. Comed provided a I

brief summary of the fire IPEEE similarities and differences between Quad Cities and Dresden Stations.  ;

i Based upon the results of the meeting, Comed was requested to submit two

, '. letters to the NRC: 1) provide the rationale 'and basis as to why its 4 acceptable to wait until November 1997 before coming to resolution of the IPEEE concerns at Quad Cities, and 2) explain why Dresden fire protection L vulnerabilities' differ from Quad Cities. The staff will complete a more extensive review of Quad Cities IPEEE by proceeding with a Level 2 evaluation.

ORIGINAL SIGNED BY:

Robert M. Pulsifer, Project Manager Project Directorate III-2 Division of Reactor Projects - III/IV j

j. Office of Nuclear Reactor Regulation '

Docket Nos 50-254 and 50-265 1

Enclosures:

1. List of Attendees
2. Licensee's Presentation -

cc w/encis: see next page j Distribution: on next page i

DOCUMENT NAME: QUAD \IPEEE. SUM To rioelve a copy of this dooumont. IndienteQ box: "C' = Copy without enclosures *E* = Copy with enclosures *N* = No copy 0FFICE PM:PDIII-2 J.- LA:A)lIj-2 0 D:PDIII-2 e l l NAME R. PULSkUil ~ C( WlR$ R. CAPRA Av DATE; 04 f /97 04N /97 04/te/97-I' 0FFICIAL RECORD COPY l

I

y - ._ _

cro g t UNITED STATES  ;

r j NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20eSH001

)

I

  • i
          • April 10, 1997 LICENSEE: Commonwealth Edison Company (Comed) l FACILITIES: Quad Cities Nuclear Power Station, Units 1 and 2

SUBJECT:

SUMMARY

OF MEETING CONCERNING THE QUAD CITIES IPEEE On March 31, 1997, the staff met with Comed to discuss the Individual Plant Examination of External Events (IPEEE) report submitted by Quad Cities on ,

February 17, 1997. This report had identified internal fire vulnerabilities that indicated an IPEEE core damage frequency (CDF) of SE-03. A list of attendees is provided as Enclosure 1.

The objective of the meeting was for Comed to discuss with the staff the potential vulnerabilities and corrective actions identified in the fire protection and post-fire safe shutdown programs and procedures for Quad  :

Cities, Units 1 and 2, during preparation of the IPEEE. Implications for Dresden Station, Units 2 and 3, were also discussed. A copy of the licensee's i presentation is included as Enclosure 2. l l

The licensee provided clarification of their evaluation including the methodology, risk reduction task force, event tree analysis and their action plan schedule. Clarification was also provided for the Interim Alternate Shutdown Method (IASM) which has been implemented at Unit 1. Comed provided a brief summary of the fire IPEEE similarities and differences between Quad Cities and Dresden Stations.

Based upon the results of the meeting, Comed was requested to submit two letters to the NRC: 1) provide the rationale and basis as to why its acceptable to wait until November 1997 before coming to resolution of the IPEEE concerns at Quad Cities, and 2) explain why Dresden fire protection vulnerabilities differ from Quad Cities. The staff will complete a more extensive review of Quad Cities IPEEE by proceeding with a Level 2 evaluation.

Ro e M. Pulsife , Project Manager Project Directorate III-2 Division of Reactor Projects - III/IV Office of Nuclear Reactor Regulation Docket Nos. 50-254 and 50-265 l

Enclosures:

1. List of Attendees
2. Licensee's Presentation cc w/encls: see next page l

l l

y -

LIST OF ATTENDEES

i. .

ON QUAD CITIES JPEEE. l MARCH 31, 1997 HAM _E COMPANY TELEPHONE N0.

1. Hal Ornstein USNRC-AE00 (301) 415-7574  !
2. Mark Cunningham USNRC-RES (301) 415-6189 j
3. Arthur Busiik USNRC-RES (301) 415-6184
4. Harold Vandermolen USNRC-RES (301) 415-6236
5. John T. Chen USNRC-RES (301) 415-6549
6. J. S. Hyslop USNRC-NRR (301) 415-3078
7. N. Chrissotinos Comed-Quad Cities (309) 654-2241
8. David Ste11 fox McGraw Hill (202) 383-2162
9. John H. Flack USNRC-NRR (301) 415-1094
10. David.A. Lochbaum Union of Concerned Scientists (202) 332-0900
11. John R. Arnold Comed (309) 654-2241 X2247
12. Charles Peterson Comed (309) 654-2241 X3606
13. Karl Adlon Comed (309) 654-2241 X2843
14. Dave Schwarz Comed (630) 663-7237
15. Mark Henry Salley USNRC-NRR (301) 415-2838
16. James A. Brownell Comed (309) 654-2241 X3054
17. William A. Lamb Comed (309) 654-2241 X3210
18. James R. Houghton USNRC-AE0D (301) 415-6353
19. 'riark Wagner Comed (630) 663-6645
20. Moni Dey USNRC (301) 415-6443
21. Al Chernick Comed (309) 654-2241 X3100
22. John Stang USNRC-NRR (301) 415-1345
23. . Edward Connell 'USNRC-SPLB (301) 415-2838
24. Steven West USNRC-SPLB (301) 415-1220
25. L. B. Marsh USNRC-SPLB (301) 415-2873
26. Pat Madden USNRC-SPLB (301) 415-2854
27. L.W. Pearce Comed (309) 654-2241
28. John J. Hutchinson Comed (309) 654-2241 l 29. Paul D. Kndespel Comed (309) 654-2241 l
30. James Masterlark Comed (309) 654-2241
31. Frank Spangenberg Comed (815) 942-2920
32. Russell Freeman Comed (815) 942-2970 X3700
33. Jack Roe USNRC-NRR/DRPW (301) 415-1354
34. A. Thadani USNRC-NRR/ADT (301) 415-1274
35. R. Capra USNRC-NRR-DRPW (301) 415-1395 i 36. R. Pulsifer USNRC-NRR-DRPW (301) 415-3016 l-ENCLOSURE 1 ,

r

-_---__-__-_---a. _ _ - -

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. - _... _ -. . ... , ... _ a .

u e1 Quad Cities Station .

-= .- -

. . - .~ .

Individual Plant Examination of ,

External Events  :

" i QUAD CmES 2 M  :

1 ENCLOSURE 2

=== = - - - -

_.4 _

I Quad Cities Fire IPEEE .

Introduction e Quad Cities Response e What was learned e Actions taken e immediate Actions e Formed Fire Protection Risk Reduction Task Force e Administratively Restricted SSD LCO's e Developed an interim Altemate Shutdown Method (IASM) e Action Plan for Long-Term improvements e Long-term Permanentimprovements e Established Risk Reduction Goals e Response to Specific Questions 2

g - u n',

_ un_= __ __ ;s; .a i

Quad Cities Fire IPEEE Presentation Overview

-v- -. . eg a l ig7 h- _

e Methodology

~

e Event Tree Analysis e Example sequence e List of top sequences e Safe shutdown failure probability e Risk Reduction Task Force eIASM e Action Plan t

e Reactor Water Clean-up (RWCU) Issue e Dresden 3

________I___________--_______-- - _ -

Quad Cities Fire IPEEE Methodology

~

~ --..

e FIVE Screening Methodology e EPRI's Fire PRA implementation Guide e Attributes of the detailed evaluation:

e Rigorous Evaluation of Human Actions e Fire Severity; i.e., Smoldering and Self-extinguishing Fires e Quantified Barrier Reliability and Unavailability e Fixed ignition Source Screening s Manual Suppression l

e Fire Propagation Between Targets vs. Worst Case (i.e., Nearest)

Target e Heat Loss Factor e Control Room Analysis

. 4

! Quad Cities Fire IPEEE Event Tree Analysis Flanuel Automene Woese EOP EOP Roeult Entry Fh h Proe*8h8'ee Suppreselon  ? ,,

Curtetri Ave #etto Canalition Sever 9ty Factors S.ceses l Succese Co.e no W ignillon

! succese Ce S.eceee ,

Cefe I osmoes  !

( Some os Branch Above)

( Some se Branch Above) e Core .

Demoge ,

i COfe [

oen=ee 5

._..a Quad Cities Fire IPEEE Top Sequence

...,...w- - . m.,-

l Event Rank Seq. Freq. Percent Failed Events F req.

l l 1 5.06E-04 9.41 % 1.34E-03 RFP 1 A Oil Fire 1.00E+00 Fire Severity 1.00E+00 Manual Suppression Fail 1.00E+00 Auto Suppression Fail 9.41 E-01 Water Curtain Pass (Single Unit I Fire) i 1.00E+00 Damage Severe, EOPs Fail Equipment Assumed Damaged:

= Offsite Power

. Diesel Generators

. Allinjection Sources l

4.03E-01 SSD Procedures Fail l

6

. _ , . _ _: _ . = _ _= _ _

_ m. w Quad Cities Fire IPEEE Top Sequences

= - = -

f e Top 5 Sequences:

Rank Seq. Freq. Percent Description l RFP 1 A Oil Fire - Man. Supp. Fail, WC Pass, EOPs Unavail., SSDPs Fail l 1 5.06E-04 9.4%

2 5.06E-04 9.4% RFP 1B Oil Fire (remainder same as sequence 1) 3 5.06E-04 9.4% RFP 1C Oil Fire (remainder same as sequence 1) 4 3.95E-04 7.3% Air Compressors Electrical / Oil Fire (remainder same as sequence 1) 5 2.99E-04 5.6% Turbine Generator Oil Fire - Man. Supp. Fail, EOPs Unavail., SSDPs Fail e Top 5 Sequences Contribute ~ 40% to the Total Fire CDF e Top 16 Sequences Contribute ~ 60% to the Total Fire CDF e Remaining ~200 Sequences Each Contribute < 1%

e Total Fire CDF is SE-03/ry 7

l Quad Cities Fire IPEEE SSD Procedure Failure Probability

~- --

e Equipment Unavailability l e Based on historical data e Relies on opposite unit equipment l

i e Equipment not available for much of a refueling outage o Approximately 0.3G e Human Error Probability e Based upon complexity of SSD procedures -large number of manual actions e Approximately 0.10 8

1 - --_ _ - -

-. l Quad Cities Fire IPEEE

! Risk Reduction Task Force e Purpose I e Objectives .

e Interim Alternate Shutdown Method

{lASM) e Fire Protection Risk Reduction Action t Plan i

l 9

_____.___--..----.-.--g i

1 Quad Cities Fire IPEEE

! IASM i-e Method of injection into the Vessel e Independent Power Source l e Independent Water Source e Same or Shared Unit Equipment d

10

= = - - - - ------- .. - _ _ _

Quad Cities Fire IPEEE l

lASM-Simplified Diagram

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e Diesel Fire Pumps e Calculations  ;

e Hydraulic e Backup Diesel Pumps e core .

e Residual Heat Removal System o PRA e Batteries for relief valves e OperatorTraining 11

Quad Cities Fire IPEEE

^

I Post IASM Sequences t n' m EOP SSD IASM IASM Result From Other EOP Branches Available Procedures Available '

I Success  !

l I i Success t

+

i Core j l

Damage I

Core Damage  !

I Success I ,

I Success Core Damage j Core Damage Before IASM ,

After IASM  ;

I i 12 .

i

= . 2 2 _ _ z_ = _ - _ _ _ _ ._. , .w i

Quad Cities Fire IPEEE Post IASM Sequences m-e Unit i Total Fire CDF Now 9E-04/ry e Top 5 Sequences:

Rank Seq. Freq. Percent Description 1 1.55E-04 16.9% Turbine Generator Oil Fire - Man. Supp. Fail, EOPs Unavail.,

SSDPs Fail, IASM Fails 2 8.06E-05 8.8% Air Compressors Electrical / Oil Fire - Man. Supp. Fail, WC Pass, EOPs Unavail., SSDPs Fail, IASM Fails 3 5.54E-05 6.0% Computer Room Cable Self-Ignition - Man. Supp. Fail, EOPs Unavail.,

SSDPs Fail 4 4.45E-05 4.9% Torus / DW DP Compressor 1 A Fire - Man. Supp. Fail, Auto Supp. Fail, EOPs Unavail., SSDPs Fail 5 4.45E-05 4.9% Torus / DW DP Compressor 1B Fire - (same as sequence 4) e Top 5 Sequences Contribute ~ 41 % of the Total Fire CDF e Top 23 Sequences Contribute ~ 81% of the Total Fire CDF e Remaining ~200 Sequences Contribute < 1% Each e Unit 2 Post IASM 13

\

1; Quad Cities Fire IPEEE

FP Risk Reduction Action Plan .

, - > * #*Q-,,.

m,-._-

e Task Force e Approach e Simplify Safe Shutdown Methodology l

. e Potential Enhancements i

i 14

Quad Cities Fire IPEEE Plan Implementation m m "' - ?"

' - * ~ '

L 1997 l

Phase of Plan 1 l2 3l4 5 l6 7 l8 i 9 l 10 11 [ 12 g j Task Force Formed IASM

  • Unit 1 }
  • Unit 2 1m _

j Develop Action Plan g i Safe Shutdown Simplification ,

  • Methodology Developmen* j g g and Feasibility Analysis
  • Mod Scope and Schedule M Resolution of Other Fire Protection lasues
  • Evaluate Solutions Based on l ~

PRA Model

  • Scope and Schedule m 15

Quad Cities Fire IPEEE RWCU issue gg Wa e,p , , . > >a.4,_

e Identification e Resolution -

e Conformance o Reporting 16

^ ^ - - - ' - - - - - - - _ _ _ . _ _ _ _ , . _ , _ , _ _ _ _

.a.,

1

. Dresden Station Fire IPEEE Dresden / QC Similarities, Differences

=~ - . . . . . . , _ _

eSimilarities and Differences Exist Between QC and Dresden Fire Protection:

> Similarities

-Non-lEEE-383 rated cables

-Load stripping following a significant fire mDifferences

-Dresden relies on isolation Condenser for safe shutdown which has few active components (therefore is less vulnerable to fire damage) and requires simple manual actions.

-Low reliance on opposite unit equipment for Safe Shutdown

-Non-combustible Vimasco cable coating in AEER

-3M Fire Barrier Cable Wraps in Key Areas

-Extensive Automatic Suppression Coverage eBased on these significant differences Dresden expects a lower CDF than QC. However, since Dresden has not completed its IPEEE, Dresden is planning for the contingency that vulnerabilities may be identified.

17 i

Dresden Station Fire IPEEE Sisps in Response to QC Results-

}

i Reviewed QC IPEEE issues for applicability to Dresden Walked down specific plant areas to assess impact mReprioritized project tasks nWork closely with and learn from QC

> Develop corrective action (s) if needed, for short term resolution of potential vulnerabilities mDevelop a plan, as appropriate, to identify and evaluate long-term resolution of vulnerabilities at Dresden j l  :

8 i

! 1 t

= .- -- - - - - - - - - - - - -

4

Quad Cities Fire IPEEE Conclusion -

e Performed Detailed Examination e Established Goals to Resolve Identified Potential Vulnerabilities e Committed Resources to Accomplish Goals e NRC Communications 19

i Quad Cities Fire IPEEE NRC Question Cross-Reference -- -

l Question / Issue Slide {s}

l l 1. Discuss the Task Force action plan, potential Slides 9,14, and 15 I

solutions, final recommendations, and implementation.

i 2. Discuss details of the Interim Altemate Slides 10 and 11 Ehutdown Method.

3. Discuss the Reactor Water Cleanup high/ low Slide 16 pressure interface issue.
4. Provide details of the top fire induced accident Slides 5,6,7, 8,12, and 13 sequences leading to core damage.
5. Discuss the potential for similar IPEEE results Slides 17 and 18 at Dresden.
6. What parts of the analysis deviated from Slide 4 EPRI's FIVE methodology?

20

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