ML20212R072

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Summary of 870325 Meeting W/Util Concerning BNL Final Rept on Technical Review of Plant Emergency Planning Sensitivity Study.Transcript,Viewgraphs & Attendance Roster Encl
ML20212R072
Person / Time
Site: Seabrook  NextEra Energy icon.png
Issue date: 04/06/1987
From: Nerses V
Office of Nuclear Reactor Regulation
To:
Office of Nuclear Reactor Regulation
Shared Package
ML20212R050 List:
References
NUDOCS 8704240266
Download: ML20212R072 (33)
v • d • e


Text

r-4 4 Sa rty fu g% UNITED STATES

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[n 3 $

NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555

%.....* 0 g A:.; y Docket Nos. 50-443 and 50-444 APPLICANT: Public Service Company of New Hampshire (PSNH)

FACILITY: Seabrook Station, Unit 1 and 2

SUBJECT:

MEETING

SUMMARY

On March 25, 1987, the NRC staff met with representatives of PSNH to discuss the Brookhaven National Laboratory (BNL) final report on the BNL technical review of the Seabrook emergency planning sensitivity study. A transcript, slides and an attendance. roster of this meeting is enclosed.

In this meeting PSNH provided their coments on the BNL study. These comments will be reviewed by the staff, and further meetings with PSNH, if necessary, will be established to respond to the comments. (

ictor Nerses, Project Manager PWR Project Directorate #5 Division of PWR Licensing-A

Enclosure:

As stated cc: See next page PDR t

Mr. Robert J. Harrison Public Service Company of New Hampshire Seabrook Nuclear Power Station cc:

Thomas Dignan, Esq. E. Tupper Kinder, Esq.

John A. Ritscher, Esq. G. Dana Bisbee, Esq.

Ropes and Gray Assistant Attorney General 225 Franklin Street Office of Attorney General Boston, Massachusetts 02110 208 State Hosue Annex Concord, New Hampshire 03301 Mr. Bruce B. Beckley, Project Manager Public Service Company of New Hampshire Resident Inspector Post Office Box 330 Seabrook Nuclear Power Station i Manchester, New Hampshire 03105 c/o US Nuclear Regulatory Commission Post Office Box 700 Dr. Mauray Tye, President Seabrook, New Hampshire 03874 Sun Valley Association 209 Sumer Street Mr. Sidney B. Barnes Haverhill, Massachusetts 01839 Manager - Power Engineering United Engineers & Constructors Inc.

Robert A. Backus, Esq. 30 South 17th Street O'Neil, Backus and Spielman Post Office Box 8223 116 Lowell Street Philadelphia, PA 19101 Manchester, New Hampshire 03105 Fr. Ted Feigenbaum William S. Jordan, III Vice President Diane Curran Engineering and Quality Programs Harmon, Weiss A Jordan P. O. Box 300 20001 S Street, NW Seabrook, New Hampshire 03874 Suite 430 Mr. Robert J. Harrison Washington, D.C. 20009 President & Olief Executive Officer Public Service Canpany of New Hampshire Mr. Philip Ahrens, Esq. Post Office Box 330 Assistant Attorney General Manchester, New Hampshire 03105 State House, Station #6 ,

Augusta, Maine 04333 Carol S. Sneider, Esq.  !

Office of the Assistant Attorney General Environmental Protection Division Mr. Warren Hall One Ashburton Place 1 Public Service Company of Roston, Massachusetts 02108 '

New Hampshire Post Office Box 330 D. Pierre G. Cameron, Jr. , Esq.

Seabrook, New Hampshire 03874 General Counsel Public Service Company of New Hampshire Seacoast Anti-Pollution League Post Office Box 330 Ms. Jane Doughty Manchester, New Hampshire 03105 5 Market Street Portsmouth, New Hampshire 03801 Regional Administrator, Region I U.S. Nuclear Regulatory Commission Mr. Diana P. Randall 631 Park Avenue 70 Collins Street King of Prussia, Pennsylvania 19406 Seabrook, New Hampshire 03874 Richard Hampe, Esq.

New Hampshire Civil Defense Agency l 107 Pleasant Street Concord, New Hampshire 03301

Public Service Company of -?- Seabrook Nuclear Power Station New Hampshire cc:

Mr. Calvin A. Canney, City Manager Mr. Alfred V. Sargent, City Hall Chairman 126 Daniel Street Board of Selectmen Portsmouth, New Hampshire 03801 Town of Salisbury, MA 01950 Ms. Letty Hett Senator Gordon J. Humphrey Town of Brentwood ATTN: Tom Burack RFD Dalton Road U.S. Senate Brentwood, New Hampshire 03833 Washington, D.C. 20510 Ms. Roberta C. Pevear Mr. Owen B. Durgin, Chairman Town of Hampton Falls, New Hampshire Durham Board of Selectmen Drinkwater Road Town of Durham Hampton Falls, New Hampshire 03844 Durham, New Hampshire 03824 Ms. Sandra Gavutis Charles Cross, Esq.

Town of Kensington, New Hampshire Shaines, Mardrigan and RDF 1 McEaschern East Kingston, New Hampshire 03827 25 Maplewood Avenue Post Office Box 366 Portsmouth, New Hampshire 03801 Chairman, Board of Selectmen RFD 2 South Hampton, New Hampshire 03827 Mr. Guy Chichester, Chaiman Rye Nuclear Intervention Mr. Angie Machiros, Chairman Committee Board of Selectmen c/o Rye Town Hall for the Town of Newbury 10 Central Road Hewbury, Massachusetts 01950 Rye, New Hampshire 03870 Ms. Cashman, Chairman Jane Spector Board of Selectmen Federal Energy Regulatory Town of Amesbury Commission Town Hall 825 North Capital Street, NE Amesbury, Massachusetts 01913 Room 8105 Washington, D. C. 20426 Honorable Peter J. Matthews Mayor, City of Newburyport Mr. R. Sweeney Office of the Mayor New Hampshire Yankee Division City Hall Public Service of New Hampshire Newburyport, Massachusetts 01950 Company 7910 Woodmont Avenue Mr. Donald E. Chick, Town Manager Bethesda, Maryland P0814 Town of Exeter 10 Front Street Mr. William B. Derrickson Exeter, New Hampshire 03823 Senior Vice President Public Service Company of Mr. Richard Strome, Director New Hampshire State Civil Defense Agency Post Office Box 300, Route 1 State Office Park South Seabrook, New Hampshire 03874 107 Pleasant Street Concord, New Hampshire 03301

I i

SUMMARY

RESPONSE

TO BNL FINAL REPORT I

0 SIGNIFICANT PROGRESS MADE IN RESOLUTION OF NHY COMMENTS o SOME NHY COMMENTS REMAIN UNRESOLVED o PRINCIPAL CONCLUSIONS OF PLG-0465 REMAIN VALID AND ROBUST o NHY PLANS TO RESOLVE REMAINING ISSUES REGARDING EVALUATION OF SHUTDOWN EVENTS l

INDUCED SG TUBE RUPTURE l

SEABROOK SPECIFIC CONTAINMENT CAPABILITY l

l l

COMPLETENESS IN SEARCH FOR EARLY RELEASE SEQUENCES l

e .

GENERAL COMMENT

S BNL REVIEW POINTS OF REMAINING j AREA AGREEMENT ISSUES INTERFACING LOCA HAS N0 IMPACT CHECK VALVE FAILURE J RATES i SHUTDOWN EVENTS MORE IN-DEPRI STUDY INTERPRETATION OF NSAC-84 NEEDED IMPACT OF SEABROOK SPECl-

)I FIC FEATURES INDUCED SG RUPTURE PROBABLY NO IMPACT VALIDATION OF NHY j ANALYSIS i

OPERATOR ERROR RATES i

i CIS FAILURE / LEAKS NUREG-4220 INTERPRETATION APPLICABILITY AND TRACE-HAS N0 IMPACT ABILITY OF NUREG-4220 EVENTS

! CONTAINMENT CAPACITY YlELD STRESS CALCULATION FAILURE CRITERION /PROBA-

) BILITY i

! CONTAINMENT LOADS SEABROOK SPECIFIC LOADS SEABROOK SPECIFIC IMPOR-SHOULD BE USED ANCE OF DIRECT HEATING l

SOURCE TERMS PLG-0465 APPROPRIATE AND CONSERVATISM OF SIW j CONSERVATNE SOURCE TERMS CONSEQUENCE MODEL REASONABLE COMPARISON DOSE VS. DISTANCE FOR S1W 0F CRACIT, CRAC2 AND i MACCS i

l l

)

i 1

l i

i I

j SHUTDOWN EVENTS l

4 l

i o RAI-21 ANALYSIS SUBMITTED AS A "OUICK LOOK" B0UNDING ANALYSIS 4

i

) o NSAC-84 ONLY INDEPTH ANALYSIS AVAILABLE l 0 THESE EVENTS NOT INCLUDED IN SSPSA, NUREG-1150, NUREG-0396 i

j OR ANY OTHER PRA i

i I

o NHY REMAINS CONFIDENT THAT RAI-21 ANALYSIS IS CONSERVATIVE i

. . _ _ _ _ _ _ _ _ -,, - - e m , _. _ -~ _ v- r- . -

i l

l t

PLANT SPECIFIC ANALYSIS OF SHUTDOWN EVENTS l

4 1

o FOLLOW TECHNICAL APPROACH IN NSAC-84 AS EXTENDED IN RAI-21 1

l 1

' PERFORM IN DEPTH AND UPDATED REVIEW 0F EXPERIENCED RHR EVENTS' o

1 I

0 CONSIDER EXPANDED LIST OF INITIATORS - E.G. SEISMIC EVENTS, l

1 I FIRES AND FLOODS i

i 4

i i o EVALUATE SEABROOK SPECIFIC FEATURES AND PROCEDURES o REQUANTIFICATION OF ACCIDENT FREQUENCIES INCLUDING UNCERTAINTIES Il

)

{

o ESTIMATION OF SITE SPECIFIC SOURCE TERMS AND CONSEQUENCES l

o EVALUATION OF PROCEDURAL ENHANCEMENTS J

l 0 COMPLETE EVALUATION BY JUNE 1987' i

1 i

s l

I j

I UNRESOLVED PHENOMENOLOGICAL ISSUES i

i e INDUCED STEAM GENERATOR TUBE RUPTURE ,

} e DIRECT CONTAINMENT HEATING l

j l

]

h i .

I 1

I 1

i . .

l

i i

INDUCED SGTR i

l CORE MELT W/

l HIGH PRESSURE OPERATORS Fall PROBABILITY THAT

& X TO DEPRESSURIZE X SG TUBES Fall = 6 x 10-6/yr l

DRYSG O.5 0.3 l

4 x 10-5 (8 x 10-8/yr) l (0.2) (0.01)

EVALUATE SEQUENCES WRITE PROCEDURES RESPONSE TO RAl-47 EVALUATE PROCEDURES TRAINING / SIMULATOR PERSUE NRC REVIEW OF MAAP

, IDENTIFY / EVALUATE CHANGES EVALUATE PORV CAPABILITY ADDITIONAL ANALYSES PRA EVALUATION PERFORM ADDITIONAL SUPPORTING ANALYSIS l PRA EVALUATION

! DESIGN OBJECTIVE l . .

i

) EARLY CONTAINMENT FAILURE CONDITIONAL CORE MELT OPERATORS Fall PROBABILITY OF W/ PRESSURE TO DEPRESSURIZE FAILURE X X =2 X 10-6/yr 0 CONTAINMENT i

2x10-4 (Zion)= . 01 ,

I EVALUATE SEQUENCES WRITE PROCEDURES SEABROOK CET ANALYSIS

! EVALUATE PROCEDURES TRAINING / SIMULATOR - NUREG 1150 j IDENTIFY / EVALUATE CHANGES EVALUATE PORV CAPABILITY -CONTAINMENT STRENGTH l PRA EVALUATION PERFORM ADDITIONAL -CONTAINMENT LOADS j SUPPORTING ANALYSIS j PRA EVALUATION i DESIGN

) OBJECTIVE i

l

)

PLAN FOR RESOLUTION OF DCH AND ISGTR ISSUES o OBTAIN NRC CONCURRENCE WITH DEPRESSURIZATION SOLUTION o NHY EVALUATE TMLB' SEQUENCE FOR SEABROOK o NRC APPROVAL OF TMLB' SOLUTION o NHY RESOLVE COMMENTS AND COMPLETE EVALUATION o REVIEW BY NRC SCHEDULE FOR RESOLUTION: JULY 1987

RESOLUTION BY RCS DEPRESSURIZATION o HAS PRECEDENT IN BWRs 1

o IMPLEMENTED AS TSC DECISION o EFFECTIVENESS CAN BE CONFIDENTLY DEMONSTRATED i

i o OPERATING STAFF WILL BE TRAINED

! c NO ADDED PLANT OR PROCEDURAL COMPLEXITY l

o 0FFERS RESOLUTION OF BOTH ISSUES i

l t

SELECTION OF TMLB' SEQUENCE TMLB' = STATION BLACK 0UT INDUCED CORE MELT WITH EFW FAILURE o FRG's ALREADY CALL FOR PORV OPENING FOR HON-BLACK 0UT SCENARIOS o A DOMINATE CONTRIBUTOR TO BOTH ISSUES FOR SEABROOK

l i >

TMLB' REVIEW ACTION PLAN o DEVELOP TSC PROCEDURE i

i o PERFORM TIME ANALYSIS O PERFORM PRELIMINARY PRA l

1 o CHECK-0UT ON SIMULATOR

~

i o FINALIZE PROCEDURE & PRA '

i i

j I o ISSUE REPORT

]

)

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

SYSTEMATIC REVIEW 0F EARLY RELEASE SEQUENCES (S1W. S6W) o STRUCTURAL CAPABILITY VS. DEGRADED CORE PHENOMENA l 0 INTERFACING BYPASSES o LARGE PENETRATIONS (ISOLATION LOSS AND PRE-EXISTING LEAKS) RESOLUTION PATH HATCHES IDENTIFIED PURGE LINES o MISSILES SCOPE OF SSPSA REVIEW o SEISMIC STRUCTURAL ANALYSIS

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STATUS OF DCH RESEAROi ANALYTICAL RESULTS AVAILABLE O CLWG STANDARD PROBLEMS - BOUNDING 0 SENSITIVITY OF SURRY DCH USING CONTAIN 0 CALCULATION BY ANL AND UNIV. OF WISC. ON DEERIS DIS RRSAL

_EXP_ERIMENTAL RESULTS - NON-PROTOTYPIC: EXTRAFOLATION TO REALTOR ACCIDENT CONDITION INAPPROPRIATE O CONTAINTNT PRESSURIZATION - DCH-1, CWTI-33, SPIT-18 AND -19 DCH-2 ALSO O DEERIS DISPERSION - SPIT-18, -19. ALL HIPS TESTS, 0.TI TESTS 0 EFFECT OF STRUCTURES - HIPS-7C, -8. BNL TESTS

~

0 EFFECT OF WATER - HIPS fM, -6W, MANY CWTI TESTS .

9 .e t

  • e

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MITIGATING _ EFFECTS UPDER INVESTIGATION 0 RCS DEPESSURIZATION INDUCED FAILURE BY NATURAL CIRCllLATION

- ACTIVE SYSTEM - FEASIBILITY AND IMPACT STUDIES BEING INITIATED, O EFFECT OF STRUCTLPE SCALING LAW UNAVAILAPLE.- DIECT APPLICATION OF SMALL SCALE TES SCALE OF FACILITY - SMALLER SCALED FACILIH IS BIASED AGAINST DOI EX-VESSEL METAL-STEAM REACTIONS, 0 EFFECT OF WATER CWI TESTS SHOWED QUENGIING BY WATER ON TE FLOOR EFECTIVE

. HIPS-W, -6W SHOED TilAT WATER IN T1E TEST CAVITY PUSHED OUT BY A PESSURE

- .1 e

  • .~ *
Surry DHEAT2 Calculations Without Blowdown Steam and no Steam Spike 4 "

16.0 -

~~

  • Pressure 14.0 -

= Temperature m***. '

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u 1600.0 y 3 u

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, . 400.0 0.0 20.0..

40.0 60.0 80.0 100.0

. Percent Core Melt-Ejection Figure J.5.1 Surry DHEAT2 calculations.

4

l Table J.S.2 Summary of parameter variaticns Surry Plant Sequoyah Plant Burn "a" Burn "b" Burn "a" Burn "b" Case Variation Pmax max /Pf P

aax P P,3 /P f P P,, /Pf Pmax/Pf max max 1 Base case 105 0.78 135 1.00 110 1.83 96 1.60 2 No trapping 115 0.85 142 1. 0f, 107 1.78 107 1.78 I

3 Fast trapping:

t d= 0.1 td (base) 93 0.69 123 0.90 93 1.55 79 1.32 4 Change drop dias. from 0.5 to 1.0 mm 100 0.74 130 0.97 93 1.54 84 1.40 5 Change steam blowdown from 30 to 10 s 138 1.03 179 1.33 123 2.05 127 2.12 6 Change core eject fraction l from 0.75 to 0.25 86 0.64 -

111 0.82 49 0.82 67 1.12 ,

7 Change zirconium oxidation from 0.5 to 0.30 103 0.76 142 1.05 110 1.83 95" 1.58 8 Add 2.0 x 104 kg codispe'rse'd" water 127 0.95 169 1.26 118 1.97 111 1.85 9

~

Add 1.0 x 105 kg .

codispersed water 100 V.74 137 1.02 52 0.87 61 1.02 Assumed failure Pressures (Pf ) Sequoyah; 60 psia .

Surry: 135 psia

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