Text

Summary of 880407 Meeting W/Util & Applied Research Assoc Re SEP Topics III-2, Wind & Tornado Loadings & III-4.A, Tornado Missiles. List of Attendees & Viewgraphs Encl
	ML20153F093
Person / Time
Site:	Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png
Issue date:	04/28/1988
From:	Wang A; Office of Nuclear Reactor Regulation
To:	; Office of Nuclear Reactor Regulation
References
	TASK-03-02, TASK-03-04.A, TASK-3-2, TASK-3-4.A, TASK-RR NUDOCS 8805100233
	Download: ML20153F093 (46)
	v • d • e

..

April 28,1988 d

Docket No. 50-213 LICENSEE:

Connecticut Yankee Atomic Power Company FACILITY:

Haddam Neck Plant

SUBJECT:

SUPMARY OF APRIL 7, 1988 MEETING REGARDING SEP TOPIC 111-?,

WiliD AND TORNADO LOADINGS AND 111-4. A, TORNADO MISSILES On April 7,1988, tl.e staff net with Connecticut Yankee Atomic Power Company (CYAPCO) to discuss our request for additional information (RAI) concerning SEP Topics III-2 and lif-4.A.

CYAPC0 stated that their approach will be to I

perforn a probabilistic risk assessment for each snutdown systen with the use of the TORMIS code (Tornado Hissile Risk Analysis Methodology). After performing a base case analysis (plant as is), CYAPC0 will perform an analysis for each system to determine which system upgrade will have the maxinun benefit to the overall risk of tornadoes.

Then based on this analysis in conjunction with a cost-benefit analysis, CYAPC0 will determine a plan to resolve SEP Topics III-2 and III-4.A.

l CYAPC0 is currently working on the base case analysis, but this effort cannot be completed until the switchgear building is complete.

Currently, the main milestone for the switchgear building is the Appendix R compliance.

Once that is complete, the additional controls and features to be included in this seismic, tornado proof building will be determined as part of the Wind and Tornado Analysis.

Based on this meeting, the NRC staff agreed'that the approach seems reasonable, but the NRC staff will need to discuss the TORills code and its applicability with the appropriate review branches.

The NRC staff requested CYAPC0 to provide a conceptual approach submittal with a proposed schedule.

CYPAC0 stated they would inform the staf f by next week as to when such a 1

subnittal could be developed.

Enclosed is CYAPC0's handout for the meeting and the attendance list.

Alan B. k "hroj0 chm Nager Project Directorate T-4 Division of Reactor Projects 1/11

Enclosures:

1.

CYAPC0's Handnut 2.

Meetirg Attendance List l

cc w/ enclosures:

See next page DISTRIEUTION Docket File ~

J. Stolz OGC-WF J. Partlow ACRS(10)

~NRC'& Local PDRs A. Wang E. Jordan NRC Participents IJ 04/16/88 04/g /88 8805100233 080428 PDR ADOCK 05000213 P

PDR

Mr. Edward J. Mroczka Connecticut Yankee Atomic Power Company Haddam Neck Plant cc:

Gerald Garfield, Esquire R. M. Kacich, Manager Day, Berry and Howard Generation Facilities Licensing Counselors at Law Northeast Utilities Service Company City Place Post Office Box 270 Hartford, Connecticut 06103-3499 Hartford, Connecticut 06141-0270 W. D. Romberg, Vice President D. O. Nordquist Nuclear Operations Manager of Quality Assurance Northeast Utilities Service Company Northeast Nuclear Energy Company Post Office Box 270 Post Office Box 270 Hartford, Connecticut 06141-0270 Hartford, Connecticut 06141-0270 Kevin Mr.Carthy, Director Regional Administrator Radiation Control Unit Region I Departnent of Environmental Protection U. S. Nuclear Regulatory Commission State Office Building 475 Allendale Road Hartford, Connecticut 06106 King of Prussia, Pennsylvania 19406 Bradford S. Chase, Under Secretary Board of Selectmen Energy Division Town Hall Office of Policy and Management Haddam, Connecticut C6103 80 Washington Strcet Hartford, Connecticut 06106 J. T. Shedlosky, Resident Inspector Haddam Neck Plant D. B. Hiller, Station Superintendent c/o U. S. Nuclear Regulatory Comission Haddam Neck Plant Post Office Box 116 Connecticut Yankee Atomic Power Company East Haddam Pest Office RFD 1, Post Office Box 127E East Haddam, Connecticut 06423 East Hampton, Connecticut 06424 G. H. Bouchard, Unit Superintendent Haddam Neck Plant RF0 il Post Office Box 127E East Hampton, Connecticut 06424 i

PEETING ON WIND AND TORNADO LOADlhGS HADDAM NECK PLANT 4/7/88 NAME COMPANY PH0hE A. Wang NRC/NRR 301 492-1313 Norman D. Rom.ney NRC/NRR/ESGB 301 492-1377 Lawerence Twistale App ied Research Assoc 919 876-0018 Party Derris NU CY) 203 267-2556 Walt Briggs NU Civil Eng) 203 665-3076 Mike Pain NU ReactorEng) 203 665-5973 Gerard Flanr.ery NU Civil Eng 2n3 665-3074 Steve Vick NU Licensing 203 665-5537 Gerard Vant'ocrdenner NU Licensing 203)665-3288 l

1 I

I

MEETING WITH THE NRC APRIL 7, 1988 ON SEP TOPICS III-2 AND III-4.A (WIND AND TORNADO LOADINGS / TORNADO MISSILES)

FOR HADDAM NECK PLANT i

I

t INTRODUCTION PARTICIPANTS STEVE VICK

- LICENSING MIKE BAIN

- SAFETY ANALYSIS WALT BRIGGS

- CIVIL ENGINEERING JERRY FLANNERY

- CIVIL ENGINEERING LARRY TWISDALE

- APPLIED RESEARCH ASSOCIATES MARTY DERRIG

- CY ENGINEERING GERRY VAN N00RDENNEN - LICENSING i

OUTLINE OF MEETING:

INTRODUCTION AND BACKGROUND

- STEVE VI".K STATUS OF CURRENT EFFORTS

- JERRY FLANNERY THE PROBABILISTIC METHODOLOGY

- LARRY TWISDALE DISCUSSION

- WALT BRIGGS SUl44ARY OF MEETING

- STEVE VICK I

1 PURPOSE OF MEETING 1.

PRESENT OUR PROBABILISTIC METHODOLOGY 2.

DESCRIBE WORK COMPLETED TO DATE 3.

DESCRIBE FUTURE WORK 4.

GET NRC FEEDBACK ON OUR HETHODOLOGY l

HADDAM NECK PLANT WIND AND TORNADO LOADINGS /TORNAD_0_ti.ISSILES.

AS OUTLINED IN NUREG 0826 -

0 SEP TOPIC III-2, III-4,A PLANT REVIEWED TO R.G. 1.76, 1.117 CRITERIA (E.G. - 300 MPH WINDSPEED, 2.25 PSI A P)

AREAS OF VULNERABILITY IDENTIFIED (DOCUMENTED IN NUREG-0826)

JUSTIFICATION FOR CONTINUED OPERATION SUBMITTED-MARCH 1982 0

C0tEITTED TO IDENTIFY POTENTIAL METHOD FOR SHUTDOWN O

PROPOSED INTEGRATED REVIEW 0F III-2, III-4.A, III-7.B ISSUES l

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STATUS OF CURRENT EFFORTS 1.

OVERVIEW 0F THE CY SITE 2.

REVIEW 0F ISAP 1.06 3.

PRESENT NU'S PROPOSED APPROACH TO THE RESOLUT10N OF ISAP 1.06.

4.

HIGHLIGHT NU'S CURRENT ACTIONS TOWARD THE RESOLUTION OF ISAP 1.06.

5.

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REVIEW SEP TOPIC III-2, WIND AND TORNADO LOADINGS SEP TOPIC III-4.A, TORNADO MISSILES

l NUREG-0826 TOPIC SUINARY OUTLINES THE NEED FOR ANALYSIS OF:

O ATMOSPHERIC DUMP VALVE (ADV) AND PIPING 0

MAIN STEAM ISOLATION VALVES (MSIV) 0 AUXILIARY FEEDWATER SYSTEM (AFS)

O WATER SOURCES 0

SERVICE WATER SYSTEM (SWS) 0 SWITCHsEAR ROOM 0

SAFE SHUTDOWN INSTRUMENTATION 0

CONTROL AIR SYSTEM 0

CONTROL R00 DRIVE SYSTEM 0

CONTROL ROOM LIFE SUPPORT EQUIPMENT f

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UPPER PRIMARY AUXILIARY BUILDING (PAB) 1 i

0 INTERIOR MASONRY WALLS i

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SEP TOPIC III-2 A.

IMPLEMENT MODIFICATIONS (PER CRITERIA FROM TOPIC III-7.B), OR B.

DEMONSTRATE ADEQUATE TORNADO RESISTANCE FOR SMALLER TORNADO LOADS AND THAT THE RISK OR PROBABILITY OF OCCURRENCE OF LARGER TORNADO LOADINGS IS ACCEPTABLE.

SEP TOPIC III-4.A A.

INTEGRATE WITH TOPIC III-2, AND 4

B.

DEMONSTRATE SHUTDOWN CAPABILITY USING PROTECTED EQUIPMENT.

l i

NU'S APPROACH TO RESOLUTION OF SEP TOPICS III-2 AND III-4A 1.

PERFORM A PROBABILISTIC RISK ASSESSMENT (PRA)

FOR EACH SHUTDOWN SYSTEM.

2.

USE OF TORMIS METHODOLOGY 3.

PERFORM COST-BENEFIT ANALYSIS TO REVIEW UPGRADE OPTIONS 4.

FINALIZE TOPIC RESOLUTION OUTLINE ACTION PLAN NRC REVIEW IMPLEMENTATION l

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NEW SWITCHGEAR BUILDING DESIGN FEATURES 1.

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2.

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0 2 FEET THICK REINFORCED CONCRETE STRUCTURE.

0 UNDERGROUND REINFORCED CONCRETE DUCTBANKS.

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NU HAS DEVELOPED A TOPIC RESOLUTION UTILIZING THE TORMIS PROGRAM WHICH IS CONSISTENT WITH THE USNRC'S PROPOSED RECOMiENDATIONS.

0 ONG0ING MODIFICATIONS, SUCH AS THE NEW SWITCHGEAR

BUILDING, DO RECOGNIZE THE NEED FOR TORNADO i

PROTECTION.

0 NU/ ARA HAVE WORKED CLOSELY IN THE REVIEW 0F VITAL COMP 0NENTS AND STRUCTURES AT THE CY SITE.

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SUMMAltY SITE,WINDSPEEDS IIAVE 13EEN CONSEllVATIVELY DEVELOPED
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TOllMIS WILL llE APPLIED CONSISTENT WITil NitC llEVIEW SAFE-SIIUTDOWN SYSTEM WILL 13E CONSIDEllED DAMAGED IF ANY COMPONENT IS DAMAGED PilOl3A131LITY OF DAMAGE Wil,L 13E ASSESSED F0lt 11ASE CASE AND VAll10US UPGilADE/PitOTECTION OPTIONS e
I

ML20153F093

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