ML20215G056

Summary of 860911 Meeting W/Bwr Owners Group in Bethesda,Md Re Strawman Generic Requirements for Enhancing BWR Containment Performance in Severe Accident Conditions.Second Technical Exchange Meeting in mid-Nov 1986 Proposed

ML20215G056
Person / Time
Site:	Hatch, Monticello, Dresden, Peach Bottom, Browns Ferry, Nine Mile Point, Fermi, Oyster Creek, Hope Creek, Cooper, Pilgrim, Brunswick, Vermont Yankee, Duane Arnold, Quad Cities, FitzPatrick, 05000000
Issue date:	10/07/1986
From:	Thadani M Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 8610160466
Download: ML20215G056 (48)

Text

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October 7, 1986 LICENSEES:

BWR OWNERS' GROUP' FACILITIES:

ALL BWR PLANTS

SUMMARY

OF SEPTEhBER 11, 1986 MEETING ON GENERIC REQUIREMENTS FOR BWR CONTAINMENTS A meeting between the BWR Owners' Group (BWROG) and the NRC was held in Bethesda, Maryland, on September 11, 1986. The purpose of the meeting was for the NRC to present to the BWR0G a set of strawman generic requirements being considered by the NRC for the purpose of enhancing BWR containment performance in severe accident conditions. The BWROG was to present the results of its parallel study using Northern States Power Company's Monticello plant as reference BWR with Mark I containment. A list of meeting attendees is enclosed (Enclosure 1).

The NRC presented the current staff thinking as sumarized in the enclosed vugraphs (Enclosure 2). Mr. Robert M. Bernero informed the BWROG that the Vermont Yankee study for containment enhancements in response to concerns expressed by the Governor of Vermont will neatly dovetail into the NRC considerations of suitable generic requirements.

The BWROG gave a presentation of its position on its parallel study (Enclosure 3). They have concluded that emergency procedure guidelines, revision 4 (EPG-4), should'be implemented by BWR owners. However, the ist,ues of hydrogen control, drywell spray enhancements, containment venting, and core debris management were being referred to Nuclear Utilities Management and Human Resources Comittee (NUPARC) for generic application to all light water reactors.

At the conclusion of the meeting, Mr. Bernero proposed a second technical exchange meeting with BWROG mid November 1986, prior to staff briefing to CRGR scheduled for November 19, 1986.

original signed by Mohan C. Thadani, Project Manager Generic Requirements for BWR Containments

Enclosures:

As stated cc: w/ enclosures:

6 DMuller/Glainas See next pages Distribution -2 Dockets 1-slist attached OGC-Bethesda NRC/ Local PDRs f6 BL'Ri EJordan/BGrimes

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HDenton/RVollmer RBernero/RHouston ACRS(10)

DBL PDs, BCs and PMs Licensees and cc lists PD#2 R/F/MThadani L:m#2:

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Browns Ferry 1,2,3 50-259/260/296 Brunswick 1,2 50-325/324 Cooper 50-298 Dresden 2,3 50-237/249 Duane Arnold 50-331 FitzPatrick 50-333 Hatch 1,2 50-321/366 Hope Creek 50-354

. Monticello 50-263 Nine Mile 1 50-220 Oyster Creek 50-219 '

Peach Bottom 2,3 50-277/278 Pilgrim 50-293 Quad Cities 1,2 50-254/265 Vermont Yankee 50-271 Fermi 2 50-341 L

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Mr. S. A. White Browns Ferry Nuclear Plant Tennessee Valley Authority Units 1, 2, and 3 cc:

General Counsel Resident Inspector Tennessee Valley Authority U. S. Nuclear Regulatory Commission 400 Commerce Avenue Route 2, Box 311 E 11B 330 Athens, Alabara 35611 Knoxville, Tennessee 37902 W. C. Drotleff ATTN:

J. A. Raulston Tennessee Valley Author 2ty 400 West Summit Hill Dirve, W12 A12 Knoxville, Tennessee 37902 R. L. Gridley Tennessee Valley Authority SN 1578 Lookout Place Chattanooga, Tennessee 37402-2801 M. J. May Tennessee Valley Aethority Browns Ferry Nuclear Plant Post Office Box 2000 Decatur, Alabama 35602 Chairman, Limestone County Commission Post Office Box 188 Athens, Alabama 35611 Ira L. Meyers, M.D.

State Health Officer State Department of Public Health State Office Building Montgomery, Alabama 36130 Regional Administrator, Region II U. S. Nuclear Regulatory Commission 101 Marietta Street, Suite 2900 Atlanta, Georgia 30303 Mr. Steven Roessler U. S. Nuclear Regulatory Commission Reactor Training Center Osborne Office Center, Suite 200 Chattanooga, Tennessee 37411

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I Mr. E. E. Utley Brunswick Steam Electric Plant Carolina Power & Light Company Units 1 and 2 cc:

Mr. P. W. Howe Mr. C. R. Dietz Vice President Plant General Manager Brunswick Nuclear Project Brunswick Nuclear Project Box 10429 Box 10429 Southpcrt, North Carolina 28461 Southport, North Carolina 28461 Thomas A. Baxter, Esquire Mr. H. A. Cole Shaw, Pittman, Potts & Trowbridge Special Deputy Attorney General 2300 N Street, N. W.

State of North Carolina Washington, D. C.

20037 Post Office Box 629 Raleigh, North Carolina 27602 Mr. D. E. Hollar Associate General Counsel Mr. Robert P. Gruber Carolina Power & Light Company Executive Director Post Office Box 1551 Public Staff - NCUC Raleigh, North Carolina 27602 Post Office Box 29b20 Raleigh, North Carolina 27626-0520 Mr. Christopher Chappell, Chairman Board of Commissioners Post Office Box 249 Bolivia, North Carolina 28422 Mrs. Chrys Baggett State Clearinghouse Budget and Management 116 West Jones Street Raleigh, North Carolina 27603 Resident Inspector U. S. Nuclear Regulatory Commission Star Route 1 Post Office Box 208 Southport, North Carolina 28461 Regional Administrator, Region II U. S. Nuclear Regulatory Commission 101 Marietta Street, Suite 2900 Atlanta, Georgia 30303 Mr. Dayne H. Brown, Chief Radiation Protection Branch Division of Facility Services N. C. Department of Human Resources 701 Barbour Drive Raleigh, North Carolina 27603-2008

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..,.,m Mr. J. M. Pflant Nebraska -Public Power District Cooper Nuclear Station cc:

Mr. G. D. Watson, General Counsel.

Nebraska Public Power District Post Office Box 4999 Columbus, Nebraska 68601

'Mr. Arthur C. Gehr. Attorney Snell & Wilmer 3100 Valley Center Phoenix, Arizona 85073

' Cooper Nuclear Station ATTN: Mr. G. Horn, Division Manager of Nuclear Operations Post Office Box 98 Brownville, Nebraska 68321 Director Nebraska Department of Environmental Control Post Office Box 94877 State House Station Lincoln, Nebraska 68509 Mr. William Siebert, Commissioner Nemaha County Board of Commissioners Nemaha County Courthouse Auburn, Nebraska 68305 Resident Inspector U.S. Nuclear Regulatory Commission Post Office Box 218 Brownville, Nebraska 68321-Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 H. Ellis Simmons, Director Division of Radiological Health c

Department of Health 301 Centennial Mall, South Post Office Box 95007 Lincoln, Nebraska 68509

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Mr. Lee Liu Iowa Electric Light and Power Company Duane Arnold Energy Center cc:

Jack Newman, Esquire Kathleen H. Shea, Esquire i

Newman and Holtzinger 1615 L Street, N. W.

Washington, D. C.

20036' Office for Planning and Programming 523 East 12th Street Des Moines, Iowa 50319 Chairman, Linn County Board of Supervisors Cedar Rapids, Iowa 52406 Iowa Electric Light and Power Company ATTN:

D. L. Mineck Post Office Box 351 Cedar Rapids, Iowa 52406 U. S. Nuclear Regulatory Commission Resident Inspector's Office Rural Route #1 Palo, Iowa 52324 Regional Administrator, Region III U. S. Nuclear Regulatory Commission 4 -

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Glen Ellyn, Illinois 60137 Mr. Thomas Houvenagle Regulatory. Engineer Iowa Conmerce Commission Lucas State Office Building Des fioines, Iowa 50319 o

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Mr. John C. Brons James A. FitzPatrick Nuclear f ewer Authority of the State of New' York Power Plant cc:

Mr. Charles M. Pratt Mr. Jay Dunkleberger Assistant Gineral Counsel Division of Policy Analysis.

Pov:cr Autho'rity of the State and Planning of New York New York State Energy Office 10 Columbus Circle Agency Building 2 New York, New York 10019 Empire State Plaza Albany, New York 12223 Resident Inspector's Office U. S. Nuclear Regulatory Commission Regional Administrator, Region I Post Office Box 136 U.S. Nuclear Regulatory Commission Lycoming, New York 13093 631 Park Avenue King of Prussia, Pennsylvania 19406 Mr. A. Klausman Mr. Radford J. Converse Vice President - Quality Assurance Resident Manager Power Authority of the State Jan.es A. FitzPatrick Nuclear of New York Power Plhnt 10 Columbus Circle Post Office Box 41 New York, New York 10019 Lycoming, New York 13093 Mr. J. A. Gray, Jr.

Mr. George Wilverding, Chairman Director - Nuclear Licensing - BWR Safety Review Conmittee Power Authority of the State Power Authority of the State of New York of New York 123 Main Street 123 Main Street k'hite Plains, New York 10601 White Plains, Nev. York 10601 Mr. Robert P. Jones, Supervisor Town of Scriba R. D. #4 Oswego, New York 13126 Mr. Leroy W. Sinclair Power Authority of the State of New York 10 Columbus Circle New York, New York 10019 Mr. M. C. Cosgrove [

Quality Assurance Superintendent James A. FitzPatrick Nuclear Power Plant Post Office Box 41 Lycoming, New York 13093 a'

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Edwin I. Hatch Nuclear Plant, Georgia Power Company Units Nos. I and 2 cc:

Bruce W. Chruchill, Esquire Shaw, Pittman, Potts & Trowbridge 2300 N Street, N.W.

Washington, D.C.

20037 Mr. L. T. Gucwa Engineering Dep&rtment Gecrgia Power Company Post Office Box 4545 Atlanta, Georgia 30302 Fr. H. C. Nix, Jr., General Manager Edwin I. Hatch Nuclear Plant Georgia Power Corrpany Port Office Box 442 Baxley, Georgia 31513 Mr. Louis B. Long Southern Company Services, Inc.

Post Office Box 2625 Birmingham, Alabama 35202 Resident Inspector U.S. Nuclear Regulatory Comission Route 1, Post Office Box 279 Baxley, Georgia 31513 Regional Administrator, Region II U.S. Nuclear Regulatory Comission, 101 Marietta Street, Suite 2900 Atlanta, Georgia 30303 Mr. Charles H. Badger Office of Planning and Budget Rocm 610 270 Washington Street, S.W.

Atlanta, Georgia 30334 Mr. J. Leonard Ledbetter, Comissioner Department of Natural Resources 270 Washington Street, N.W.

Atlanta, Georgia 30334 Chairman Appling County Comissioners County Courthouse Baxley, Georgia 31513 P

9 Mr. E. G. Bauer, Jr.

Peach Bottom Atomic Power Station, Philadelphia Electric Company Units 2 and 3 cc:

Mr. Eugene J. Bradley Mr. R. A. Heiss, Coordinator Assistant General Counsel Pennsylvania State Clearinghouse Philadelphia Electric Company Governor's Office of State Planning 2301 Market Street and Development Philadelphia, Pennsylvania 19101 Post Office Box 1323 Harrisburg, Pennsylvania 17120 Troy B. Conner, Jr., Esquire 1747 Pennsylvania Avenue, N.W.

Mr. Thomas M. Gerusky, Director Washington, D.C.

20006 Bureau of Radiation Protection Pennsylvania Department of Thomas A. Deming, Esquire Environmental Resources Assistant. Attorney General Post Office Box 2063 Department of Natural Resources Harrisburg, Pennsylvania 17120 Annapolis, Maryland 21401 Mr. Albert R. Steel, Chairman Mr. R. Fleishmann, II, Manager Board of Supervisors Peach Bottom Atomic Power Station Peach Bottom Township R. D. #1 R. D. #1 Delta, Pennsylvania 17314 Delta, Pennsylvania 17314 Mr. G. M. Leitch, Superintendent Nuclear Generation Division 67-1 Philadelphia Electric Company 2301 Market Street Philadelphia, Pennsylvania 19101 Mr. Anthony J. Pietrofitta, General Manager Power Production Engineering Atlantic Electric Post Office Box 1500 1199 Black Horse Pike Pleasantville, New Jersey 08232 Resident Inspector U.S. Nuclear Regulatory Commission Peach Bottom Atomic Power Station Post Office Box 399 Delta, Pennsylvania 17314 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406

Mr. R. W. Capstick Vermont Yankee Nuclear Power Vermont Yankee Nuclear Power Corporation Station cc:

Mr. J. G. Weigand Mr. W. P. Murphy, Vice President &

President & Chief Executive Officer Manager of Operations Vermont Yankee Nuclear Power Corp.

Vermont Yankee Nuclear Power Corp.

R. D. 5, Box 169 R. D. 5, Box 169 Fe'rry Road Ferry Road Brattleboro, Vermont 05301 Brattleboro, Vermont 05301 Mr. Donald Hunter, Vice President Mr. Gerald Tarrant, Commissioner Vermont Yankee Nuclear Power Corp.

Vermont Department of Public Service 1671 Worcester Road 120 State Street Framingham, Massachusetts 01701 Montpelier, Vermont 05602 New England Coalition on Public Service Board Nuclear Pollution State of Vermont Hill and Dale Farm 120 State Street R. D. 2. Box 223 Montpelier, Vermont 05602 Putney, Vermont 05346 Vermont Yankee Decommissioning Mr. Walter Zaluzny Alliance Chairman, Board of Selectman Box 53 Post Office Box 116 Montpelier, Vermont 05602-0053 Vernon, Vermont 05345 Resident Inspector Mr. J. P. Pelletier, Plant Manager U. S. Nuclear Regulatory Commission Vermont Yankee Nuclear Power Corp.

Post Office Box 176 Post Office Box 157 Vernon, Vermont 05354 Vernon, Vermont 05354 Vermont Public Interest Mr. Raymond N. McCandless Research Group, Inc.

Vermont Division of Occupational 43 State Street 8 Radiological Health Montpelier, Vermont 05602 Administration Building 10 Baldwin Street Regional Administrator, Region I Montpelier, Vermont 05602 U. S. Nuclear Regulatory Commission 631 Park Avenue Honorable John J. Easton King of Prussia, Pennsylvania 19406 Attorney General State of Vermont 109 State Street Montpelier, Vermont 05602 John A. Ritscher, Esquire Ropes & Gray 225 Franklin Street Boston, Massachusetts 02110 5

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Mr. Michael I. Miller Mr. Nick Kalivianakis Isham, Lincoln & Beale

. Plant Superintendent Three First National Plaza Cuad Cities Nuclear Power Station Suite 5200 22710 206th Avenue North Chicago, Illinois 60602 Cordova, Illinois 61742 Mr. Doug Scott Chairman, Rock Island-County Plant Superintendent Board of Supervisors Dresden Nuclear Power Station Rock Island County Court House Rural Route #1

. Rock Island, Illinois 61201-Morris, Illinois 60450 U.S. Nuclear Regulatory Commission Resident Inspectors Office Dresden Station Rural Route #1 Morris, Illinois 60450 Chairman Board of Supervisors of Grundy County Grundy County Courthouse Morris, Illinois 60450 Regional Administrator, Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 Mr. Michael E. Parker, Chief Division of Engineering Illinois Department of Nuclear Safety 1035 Outer Park Drive, 5th Floor Springfield, Illinois 62704 Mr. B. C. O'Brien, President Iowa-Illinois Gas & Electric Comoany 206 East Second Avenue Davenport, Iowa 52801 Resident Inspector U.S. Nuclear Regulatory Commission 22712 206th Averue North Cordova, Illinois 61242 3

Mr. D. M. Musolf Northern States Power Company Monticello Nuclear Generating Plant cc:

Gerald Charnoff, Esquire Commissioner of Health Shaw, Pittman, Potts and Minnesota Department of Health Trowbridge 717 Delaware Street, S. E.

2300 N Street, NW Minneapolis, Minnesota 55440 Washington, D. C.

20037

0. J. Arlien, Auditor U. S. Nuclear Regulatory Commission Wright County Board of Resident Inspector's Office Commissioners Box 1200 10 NW Second Street Monticello, Minnesota 55362 Buffalo, Minnesota 55313 Plant Manager Monticello Nuclear Generating Plant Northern States Power Company Monticello, Minnesota 55362 Russell J. Hatling Minnesota Environmental Control CitizensAssociation-(MECCA)

Energy Task Force 144 Melbourne Avenue, S. E.

Minneapolis, Minnesota 55113 Executive Director Minnesota Pollution Control Agency 1935 W. County Road B2 Roseville, Minnesota 55113 John W. Ferman, Ph.D.

Nuclear Engineer Minnesota Pollution Control Agency 1935 W. County Road B2 Roseville, Minnesota 55113 Regional Administrator, Region III U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137

l Mr. C. V. Mangan Nine Mile Point Nuclear Station, Niagara Mohawk Power Corporation Unit No. I cc:

Troy B. Conner, Jr., Esquire Conner & Wetterhahn Suite 1050 1747 Pennsylvania Avenue, N. W.

Washington, D. C.

20006 Frank R. Church, Supervisor Town of Scriba R. D. #2 Oswego, New York 13126 Niagara Mohawk Power Corporation ATTN: Mr. Thomas Perkins Plant Superintendent Nine Mile Point Nuclear Station Post Office Box 32 Lycoming, New York 13093 Resident Inspector U. S. Nuclear Regulatory Commission Post Office Box 126 Lycoming, New York 13093 John W. Keib, Esquire Niagara Mohawk Power Corporation 300 Erie Boulevard West Syracuse, New York 13202 Regional Administrator, Region I U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406 Mr. Jay Dunkleberger Division of Policy Analysis and Planning New York State Energy Office Agency Building 2 Empire State Plaza Albany, New York 12223

Mr. P. B. Fiedler Oyster Creek Nuclear Oyster Creek Nuclear Generating Station Generating Station cc:

Mr. Ernest L. Blake, Jr.

Resident Inspector Shaw, Pittman, Potts and Trowbridge c/o U.S. NRC 2300 N Street, NW Post Office Box 445 Washington, D.C.

20037 Forked River, New Jersey 08731 J.B. Liberman, Esquire Commissioner Bishop, Liberman, Cook, et al.

New Jersey Department of Energy 1155 Avenue of'the Americas 101 Commerce Street New York, New York 10036 Newark, New Jersey 07102 Mr. David M. Scott, Acting Chief Regional Administrator, Region I Bureau of Nuclear Engineering U.S. Nuclear Regulatory Commission Department of Environmental Protection 631 Park Avenue CN 411 King of Prussia, Pennsylvania 19406 Trenton, New Jersey 08625 BWR Licensing Manager GPU Nuclear 100 Interpace Parkway Parsippany, New Jersey 07054 Deputy Attorney General State of New Jersey Department of Law and Public Safety 36 West State Street - CN 112 Trenton, New Jersey 08625 Mayor Lacey Township 818 West Lacey Road Forked River, New Jersey 08731 Licensing Manager Oyster Creek Nuclear Generating Station Mail Stop: Site Emergency Bldg.

P. O. Box 388 Forked River, New Jersey 08731 1

Mr. James M. Lydon Boston Edison Company Pilgrim Nuclear Power Station cc:

Mr. Alfred E. Pedersen, Station Manager Boston Edison Company RFD #1, Rocky Hill Road Plymouth, Massachusetts 02360 Resident Inspector's Office U. S. Nuclear Regulatory Commission Post Office Box 867 Plymouth, Massachusetts 02360 Chairman, Board of Selectmen 11 Lincoln Street Plymouth, Massachusetts 02360 Office of the Commissioner Massachusetts Departnent of Environmental Quality Engineering One Winter Street Boston, Massachusetts 02108 Office of the Attorney General 1 Ashburton Place 19th Floor Boston, Massachusetts 02108 Mr. Robert M. Hallisey, Director Radiation Control Program Massachusetts Departnent of Public Health 150 Tremont Street, 2nd Floor Boston, Massachusetts 02111 Regional Administrator, Region I U. S. Nuclear Regulatory Commissian 631 Park Avenue King of Prussia, Pennsylvania 19406 Mr. James D. Keyes Boston Edison Company 25 Braintree Hill Office Park Braintree, Massachusetts 02184

1 Mr. B. Ralph Sylvia Detroit Edison Company Fermi-2 Facility cc:

Mr. Harry H. Voigt, Esq.

Ronald C. Callen LeBoeuf, Lamb, Leiby & MacRae Adv. Plannino Review Section 1333 New Hampshire Avenue, N. W.

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Lansing, Michigan 48909 Senior Attorney The Detroit Edison Company Regional Administrator, Region III 2000 Second Avenue U. S. Nuclear Regulatory Commission Detroit, Michigan 48226 799 Roosevelt Road Glen Ellyn, Illinois 60137 Mr. Dennis R. Hahn, Chief Nuclear Facilities and Environmental Monitoring Section Office Division of Radiological Health P. O. Box 30035 Lansing, Michigan 48909 Mr. Robert Woolley Acting Supervisor-Licensing The Detroit Edison Company Fermi Unit 2 6400 No. Dixie Highway Newport, Michigan 48166 Mr. Walt Rogers U. S. Nuclear Regulatory Commission Resident Inspector's Office 6450 W. Dixie Highway Newport, Michigan 48166 Monroe County Office of Civil Preparedness 963 South Raisinville Monroe, Michigan 48161

Enclosure il NRC-BWROG MEETING ON CORTATtKEKI REQUIREMENTS SEPTEMBIE[R'Y1,1986 NAME AFH LIATION R. Eernero NRC/ DBL H. Certen NRC/NRR C. Reed Ccrnmorvealth Ediscn Jctr Raulstor.

Tennessee Valley Authcrity Vincent Boyer Philadelphia Electric Compar3 Richard Diederich Philadelphia Electric Ccripany James C. Carter IT Corp /ICCOR Edward Howerd Bcstcn Edisor R. E. Skavdrhl General Electric Jchr. F. Fulter Ecston Edison Corpany T. E. Lende rs New York Power Authority J. A. Gray, Jr.

New York. Power Auttcrity S. D. Floy(

Carolina Pcwer & Light Ccmpar.;

A. B. Cutter Carolina Pcwer & Light Company H. W. Keiser Pernsylvania Pcwer & Light Company Brian VcCaffrey Lorig Island Ligrting Conpan)

Charles Caveric Lors Island Lighting Company L. T. Gueva Georgia Pcwcr Company S. H. Chesr ut Georgia Power Ccepany J. R. Langley Gulf States Utilities /HCOG Terry Pickett-Northern States Pcwer Kevin Hcitzclav.

Eereral Electric Ccrapany Dean Houston NRC/ACRS Staff Farouk Eltawila NRR/DSR0/ RIB Jir Deoder.s Gulf States Utilities Ccapny Cernis B. Hacking Enercon Services /HCOG Wayr4 Hodges NRC/ DBL /RSE L. G. Hulman NRR/ DBL /PSB tr. Sele Earinos NRR/ DEL S. W. Wilczek, Jr.

Niagara Mohawk Eruce A. Prestor Power Supply & Er:sineering & Const.

Richard F. Murray Power Supply 8 Engineering & Cor.st.

Victael J. l'ay Tennessee Valley Authority - BFN Woody Stroup Enercen Services Pat Pcwcll Washington Public Power Supply Syster Lynn Connor Doc-Search Associates Larry Gifford General Electric John Stang NRR/BWRd/ Lacrosse Project Manager lhomas S. Rotella NRR/ DBL /BWDa Big Rock Point PM Raman Pichumani NRR/ DBL / FOB Donald R. Hoffmar.

Cleveland Electric Illuminating Vernon L. Rooney NRR/ DBL /BWC2 John Larkins 0CM/LZ Kazirnieras Campe NRR/ DBL /PSB Gerald E. Gears NRR/ DBL /PD#2

. NAME AFFILIATION Jack Kudrick NRR/ DBL /PSB Jay Thayer Yankee Atomic R. J. Lodwick Verment Yarkee Stephen P. Schtit:

Yankee Atomic Electric D6vid H. Kagner NRR/ DBL /BKD3 Dcn.enic B. Vassallt NRR/ DBL /F0E Daniel R. Muller NRR/ DBL /PD2 John A. 2kolirski NRR/ DBL /BWD1 Paj AulLck NRR/ DBL /BWD1 Jack Denchcv NRR/ DBL /PL'D1 E. G. Adenscr' NRR/ DBL /BKL3 Earl Pase Detroit Edison Phillip L. Paull Verment Public Service Dept.

G. Tarrant VT Dept. Pub. Service N. V. Edwards NUTECH C. L. Reic' Bechtel Owen M. Scott Southern Co. Services G. D. Laircs NRR/ DBL Eve Fotopoulcs SERCH Licensiris, Bechtel 2

Akira Orctc The Tokyo Electric Pcwer Tetst Imai TEPIC Sang Ec Kit NRR/ DBL /PSB Mohar. C. Thadar.1 NRR/ DBL /BWD2 Kathleer H. Shot Newman & Mcitzinger David Wilscr Iowc Electric Lignt and Power Stepher. Mticocy Devenrue Don Lewis Mississippi Pcwer 8 Light pal 1 Leech NRC/BKDI

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EN CLo SVRE WL DISCUSSION OF A GENERIC LETTER ON BWR CONTAINMENT PERFORMANCE SEPTEMBER 11, 1986 1

ROBERT-M. BERNER0, USNRC l

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GENERIC LETTER ON BWR CONTAINMENT PERFORMANCE 4

THE SETTING:

PLANT EVALUATIONS UNDER THE SEVERE ACCIDENT POLICY STATEMENT THE KEY REGULATIONS:

GDC 16 AND GDC 50 THE SUBJECTS:

37 BWRS WITH PRESSURE SUPPRESSION CONTAINMENTS 1

THE METHOD:

A GENERIC LETTER OF REQUIREMENTS TO IMPLEMENT CHANGES BASED ON GENERIC EVALUATION V

2 NRC SEVERE ACCIDENT POLICY STATEMENT

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s THE MOST COST-EFFECTIVE OPTIONS FOR REDUCING THIS e

VULNERABILITY SHALL BE IDENTIFIED AND A DECISION SHALL BE REACHED CONSISTENT WITH THE COST-EFFECTIVENESS CRITERIA 0F THE COMMISSION'S BACKFIT POLICY AS TO WHICH OPTION OR SET OF OPTIONS (IF ANY) ARE JUSTIFIABLE AND REQUIRED TO BE IMPLEMENTED.

IN THOSE INSTANCES WHERE THE TECHNICAL ISSUE G0ES BEYOND e

CURRENT REGULATORY REQUIREMENTS, GENERIC RULEMAKING WILL BE THE PREFERRED SOLUTION.

IN OTHER CASES, THE ISSUE SHOULD BE DISPOSED OF THROUGH THE CONVENTIONAL PRACTICE OF ISSUING BULLETINS AND ORDERS OR GENERIC LETTE,RS WHERE.: MODIFICATIONS ARE JUSTIFIED THROUGH-BACKFIT POLICY, OR THROUGH PLANT-SPECIFIC DECISION MAKING ALONG THE LINES OF THE INTEGRATED SAFETY ASSESSMENT PROGRAM (ISAP) CONCEPTION.

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GDC 16:

CRITERION 16 - CONTAINMENT DESIGN.

--AN ESSENTIALLY LEAK-TIGHT BARRIER AGAINST THE UNCONTROLLED RELEASE OF RADI0 ACTIVITY TO THE ENVIRONMENT.AND TO ASSURE THAT THE CONTAH4 MENT DESIGN CONDITIONS IMPORTANT TO SAFETY ARE NOT EXCEEDEJ FOR AS LONG AS POSTULATED ACCIDENT CONDITIONS REQUIRE."

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4 GDC 50:

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AS REQUIRED BY CRITERION 50 - CONTAINMENT DESIGN BASIS.

SECTION 50.44, ENERGY FROM METAL-WATER AND OTHER CHEMICAL REACTIONS THAT MAY RESULT FROM DEGRADATION BUT NOT TOTAL FAILURE OF EMERGENCY CORE COOLING FUNCTIONING, (2) THE LIMITED EXPERIENCE AND EXPERIMENTAL DATA AVAILABLE FOR DEFINING ACCIDENT PHENOMENA AND CONTAINMENT RESPONSES, AND (3) THE CONSERVATISM 0F THE CALCULATIONAL MODEL AND INPUT PARAMETERS."

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O.S. BOILING WATER REACIQRS 24 BWR 2/3/4 WITH MARK CONTAINMENT (ALL LICENSED) e 9 BWR 4/5 WITH MARK II CONTAINMENT (7 LICENSED) e 4 BWR 6 WITH MARK III CONTAINMENT (3 LICENSED) e W

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INSTITUTIONAL PROCESS

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e CLOSURE OF SEVERE ACCIDENT ANALYSIS FOR CONTAINMENT NO FURTHER ANALYSIS UNLESS EXCEPTION IS TAKEN e

SPECTRUM OF OPTIONS RULEMAKING 50.54F LETTER FOLLOWED BY ORDER GENERIC LETTER FROM DIRECTOR NRR OR DIRECTOR DBWRL e

PROCESS CHARACTERISTICS BASED ON TECHNICAL WORK AVAILABLE, IDCOR, SOURCE TERM, PLANT SPZCIFIC WORK, NUREG-1050, NUREG-1150 OPEN TO PUBLIC FOR COMMENT AND PARTICIPATION h

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A BWR - MARK I FOR REFERENCE BEFORE e

CORE MELT FREQUENCY:

1x10-4/YR A FULL' SPECTRUM OF SEQUENCES INCLUDING BLACK 0UTS e

CONTAINMENT CAPABILITY:

UNCERTAIN AND VARIABLE BUT ASSUME 1 OUT OF 2 CORE MELTS GIVES FAIRLY LARGE RELEASE I

AFTER e

CORE MELT FREQUENCY-1x10-4/HR IPE FOR FRONT END MAY REDUCE BUT NO CREDIT IS TAKEN HERE e

CONTAINMENT CAPABILITY:

SUBSTANTIAL ASSURANCE THAT CONTAINMENT WILL MITIGATE CONSEQUENCES, DEGREE VARIABLE FROM PLANT TO PLANT BUT 1 OUT OF 50 CORE MELTS GIVING A FAIRLY LARGE RELEASE SHOULD BE REPRESENTATIVE L

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8 HYDROGEN CONTROL

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PROPOSED REQUIREMENTS e

CHANGE TECH. SPEC. AT END OF OPERATION FROM 24-HOUR ALLOWANCETO12-HOURALLOWANCEOFNON-INERTEDONERATIONAI REDUCED POWER e

PERMIT 12-HOUR PERIOD AT REDUCED POWER WITHIN THE OPERATING CYCLE TO SEARCH ~FOR UNIDENTIFIED LEAKAGE RATIONALE e

DEINERTING TYPICALLY TAKES 4-8 HOURS e

LEAKAGE INSPECTION AND MINOR REPAIR CAN BE REASONABLY ACHIEVED IN 4-8 HOURS REDUCED POWER (35 33%) SUBSTANTIALLY' REDUCES SHORT-LIVED e

FISSION PRODUCT INVENTORY AND DYNAMICS OF POSSIBLE ACCIDENTS I

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DRYWELL SPRAY PROPOSED REQUIREMENTS e

REDUCE DESIGN SPRAY RATE (CHANGE N0ZZLES) TO AB0VT l0% OF PRESENT VALUE e

PROVIDE AC-POWERED BACKUP WATER SUPPLY FOR SPRAY AND AC-INDEPENDENT WATER SUPPLY, AVAILABILITY BY REMOTE MANUAL OPERATION OR BY SIMPLE RELIABLE PROCEDURE DESIRABLE e

MAKE ALTERNATE WATER SOURCES AVAILABLE TO COOL CORE DIRECTLY e

90/10 MODE OF RHR OPERATION RATIONALE 4

s WATER SUPPLIES AND EQUIPMENT ARE ALREADY AVAILABLE FOR LOWER FLOWS e

LOWER. FLOWS PROVIDE ALL BENEFITS EXCEPT LOW sd T DECAY HEAT REMOVAL AND DO NOT RAPIDLY FLOOD CONTAINMENT e

ASSURED DRYWELL SPRAY SUBSTANTIALLY REDUCES PROBABILITY AND SIGNIFICANCE OF DRYWELL FAILURE OR SUPPRESSION POOL BYPASS F

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en 10 PRESSURE CONTROL PROPOSED REQUIREMENTS

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e RELIABLE CAPABILITY TO VENT WETWELL AT EPG PRES,S.URE LEVEL WITH OR WITHOUT AC POWER.

FOR VENTING WITHOUT AC POWER MANUAL PROCEDURE IN ADVANCE MAY BE USED IF NITROGEN PURGE IS AVAILABLE e

VENT OF 18-INCH DIAMETER OR GREATER DESIRABLE e

ABILITY TO VENT SLOWER SEQUENCES THROUGH STANDBY GAS TREATMENT SYSTEM e

BURST RESISTANCE DUCTING IN REACTOR-BUILDING TO MINIMIZE COMPLICATIONS RATIONALE e

RELIABLE VENTING PREVENTS UNCONTROLLED OVERPRESSURE FAILURE WHICH'CAN CAUSE CORE MELT e

VENTING WITH DRYWELL SPRAY GIVES GREAT ASSURANCE OF RELEASE MITIGATION a

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11 CORE DEBRIS PROPOSED REQUIREMENTS e

ASSURE RETENTION OF WATER AT LEAST 3 FEET DEEP IN TORUS ROOM IF TORUS LEAKS ENTIRE CONTENTS DESIRABLE e

CONCRETE CURBS OR OTHER BARRIERS WHICH WOULD RETARD DEBRIS ATTACK 0F DRYWELL SHELL i

e AVOID LOSS OF RECOVERY SYSTEMS FROM WETTING BY TORUS ROOM WATER RATIONALE e

DRYWELL FAILURE BY DEBRIS ATTACK IS MADE LESS LIKELY AND LESS SIGNIFICANT BY DRYWELL SPRAY AND VENTING l

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RETENTION OF TORUS WATER ENSURES DEBRIS QUENCHING AND SHOULD FACILITATE ACCIDENT RECOVERY l

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CHRONOLOGY e

J9NE 16, 1986:

MEETING WITH BWROG/IDCOR PROPOSED A GENERIC LFTTER, PRESCRIPTIVE SOLUTION, BY BACKFIT e

JUNE 30, 1986:

VERMONT YANKEE COMMITS TO GOV. KUNIN TO D0 A SPECIAL 60-DAY CONTAINMENT STUDY I

e JULY 25, 1986:

BOSTON EDIS0N COMPANY BOARD DECIDES TO FIX PILGRIM CONTAINMENT AUGUST 19, 1986:

BWROG EXECUTIVES VOTE TO FUND AND CONTINUE e

DIALOGUE ON THIS WITH NRC, CONTACT NUMARC ABOUT BWR VS. PWR e

SEPTEMBER 11, 1986:

MEETING WITH BWROG TO COMPARE BACKFIT NOTES AND STRAWMAN GENERIC REQUIREMENTS e

SEPTEMBER 11, 1986:

MEETING WITH VERMONT YANKEE TO REVIEW CONTAINMENT STUDY e

SEPTEMBER 23, 1986:

NRC/IDCOR MEETING ON BWR/ MARK I ANALYSES 23, 1986:

ACRS SUBCOMMITTEE ON CONTAINMENT SEPTEMBER e

PERFORMANCE TO DISCUSS HARPERS FERRY WORKSHOP RESULTS AND BWR CONTAINMENT GENERIC APPROACH SEPTEMBER 24, 1986:

ACRS SUBCOMMITTEE ON CLASS 9 ACCIDENTS TO e

DISCUSS BWR/ MARK I ANALYSES AND SEVERE ACCIDENT PROGRAM e

NOVEMBER 19, 1986:

CRGR REVIEW OF DRAFT GENERIC LETTER ON BWR l

CONTAINMENT REQUIREMENTS (T0 BE PUBLISHED FOR COMMENT) e DECEMBER 17, 1986:

ISSUE DRAFT GENERIC LETTER ON BWR CONTAINMENT REQUIREMENTS FOR PUBLIC COMMENT e

APRIL 1987:

ISSUE FINAL GENERIC LETTER ON BWR. CONTAINMENT

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REQUIREMENTS l

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-e 1-SEVERE ACCIDENT CONTAINMENT POLICY e

INDUSTRY EVALUATIONS P

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SEPTEMBER 11, 1986 1

i BETHESIR, MD, l

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OBJECTIVES:

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o PRESENT RESULTS OF IDCOR/BWROG & UTILITY EVAllMTIQlS OF PROPOSED SEVERE ACCIDENT CONTAINMENT POLICY ELEMENTS i

o DISCUSS CONCLUSIONS REACHED BY UTILITIES i

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CONCLUSIONS - BWR EXECUTIVE MEETING o

AUGUST 19 MEETING - 20 0F 23 BWROG UTILITIES REPRESENTED o

CONTINUE CONSTRUCTIVE DIALOGUE WITH NRC o

AGREEMENTS:

COMMIT TO IMPLEMENTATION OF REVISION 4 TO EPGS NUMARC CONTACTED TO CONSIDER SEVERE ACCIDENT CONTAINMENT ISSUE AS A GENERIC INDUSTRY ISSUE CONTINUE WORKING WITH NRC TO BETTER DEFINE ISSUES FOR RESOLUTION PROPOSE TO BWROG SEVERE ACCIDENT INSIGHT REVIEW 0F EPG REV. 4 I

IDCOR/BWROG/ UTILITY EVALUATIONS:

o WIDE VARIATION IN ESTIMATED COST

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o EVALUATIONS PERFORMED ON SMALL NUMBER OF PLANTS o OBJECTIVES APPEAR GENERIC - ENHANCEMENTS APPEAR PLANT SPECIFIC o QUALITATIVE ASSESSMENTS OF BENEFITS AND NEGATIVE IMPACTS PERFORMED 4

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ELEMEl1T 1 - HYDROGEN OBJECTIVE:

PREVENT HYDR 0 GEN COMBUSTION CAUSED FAI LURE REQUIREMENTS:

A.

0XYGEN CONTROL (MARK I AND f%RK II)

B.

HYDR 0 GEN CONTROL (MARK III)

IDCCR/BWROG EVALUATIONS:

o OXYGEN CONTROL BY NITROGEN INERTING ADEQUATE FOR MARK I AND MARK IIs.

o LIMITING THE TIME DEINERTED UNDER REVIEW.

o

' MARK III HYDROGEN CONTROL BEING ADDRESSED BY HYDROGEN CONTROL OWNERS' GROUP (HC0G),

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h HYDROGEN CONIBOL OWERS G00P SN i 10 ADDRESS SEVERE NY'TTFWIS MD SDTICN BUGDUT MEETTING WITH THE NRC (N SEVERE NrTTwNrs BE'mPRR SEPHMBER 11, 1986 O

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BACKGROGO i

Establishdd HOOG Progr es-to address Hydrogen Rule requirments for

" Degraded Core Accidents".

- Quarter Scale Testing Program

- Analytical effort i

• Station Blackout as a hydrogen generation event (HGE) within the context of recoverable degraded cores is an issue being addressed.

- Current HOOG evaluation indicates that SB0 is not a credible HGE

- HODG responding to NRC questions

• 'Ihe need for an independent power supply for igniters in the event of an SB0 identified by the NRC in the context of Severe Accidents.

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BOOG PRTOSAL HOOG to supply the design criteria for a backup power supply to the hydrogen igniters.

• Backup power supply need not be safety related

• Identify impact of addressing Severe Accidents on the design of a backup power supply.

• Ntznhar of igniters required in the event of an SB0

- Make use of existing data base and criteria

- Additional testing, only if necessary, to follow cmpletion of current Test Program - end of this year Responsibility cf individual Mark III Owners with support of HOOG as required.

- Define backup power supply source

- Define associated costs

- Meet and discuss wJth the NRC the details of the design, costs, and benefits of a backup power supply to the igniters

- Decision and timing for pr M ing s

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r-ELEMENT 2 - SPRAYS GJECTIVE:

SPRAY WATER T0:

1.

QUENCH DEBRIS (PRIMARY)

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2.

SCRUB AEROSOLS (SECONDARY) 3.

LWER PRESSURE (SECONDARY) 4.

COOL VULNERABLE EQUIPMENT (SECONDARY)

REQUIREMENTS 1 1.

SPRAY IN DRYWELL 2.

BACKUP WATER SOURCES AND PUMPS

- HOSE CONNECTIONS

- USE OF FIREf% INS IDCOR/BWROG EVALUATIONS:

o TYPICAL SPRAY CAPACITY 5 - 10,000 GPM/ HEADER o

CONCEPTS CONSIDERED l

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CONNECTION TO HOSE STATIM IN REACTG BUILDING

- APPROXIMATE FLN PROVIDED 200 GPM

- DES NOT PROVIDE SPRAY l

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ELEMENT 2 - SPRAYS (Continued)

O CROSS TIES FROM DIESEL FIRE PUMPS TO RHR

- APPROXIm TE FL W PROVIDED 1/2 0F FIRE PUMP RATING

- CLOSE OFF APPR0XIMTELY 70% 7 N0ZZLES TO ACHIEVE SPRAY o

FLOW RATES IDENTIFIED APPEAR ADEQUATE o

DEBRIS QUENCHING DOES NOT REQUIRE SPRAY o

POTENTIAL BENEFIT / RISK WARRANTS FURTHER STUDY

E LEMENT 3 - PRESSURE OBJECTIVES:

1.

AVERT UNCONTR0LLED OVERPRESSURE FAILURE 2.

CONTROL RELEASE PATH (SCRUBBING)

REQUIREMENTS:

1.

SUBSTANTIAL CAPABILITY TO VENT WETWELL 2.

REMOTE / RELIABLE CONTROL 0F VENT VALVE 3.

ABILITY TO RECLOSE VENT IDCOR/BWR0G EVALUATIOb:

o CONCEPTS CONSIDERED o

UPGRADE DUCTING AND STANDBY GAS TREATMENT SYSTEM (SBGTS) TO CONTAINMENT DESIGN PRESSURE CAPABILITY

- NCT FEASIBLE TO UPGPADE SBGTS o

HARDPIPED BYPASS AROUND SBGTS o

HARDPIPED DEDICATED VENT o

COSTS ARE C MPARABLE FOR HARDPIPED (PTIWS m

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ELEME6C 3 - PRESSURE (Continued) o VENT SIZING UNDER REVIEW N

o ATWS

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0 DHR 53 5 a gg o

NEGATIVE. IMPACTS NEEDING FURTHER REVIEW o

SECONDARY CONTAINMENT CONTAMINATION o

DELIBERATE RELEASE 1

r ELEMENT 4 - C @E DEBRIS OBJECTIVE:

REDUCE LIKELIHOOD E FAILURE BY DIRECT ATTACK REQUIREMENTS:

1.

USE PRACTICAL DEBRIS RETARDING BARRIERS 2.

CWSERVE SUPPRESSIW P0OL WATER AS A QUENCHING P0OL IDC N/BWROG EVA LUATI ONS:

o DRYWELL o

CONCEPTS CONSIDERED 3

PLUG IN PEDESTAL OPENING INCREASE SUMP SIZE INSIDE PEDESTA L CURB OJTSIDE PEDESTA L OPENING CURB AT DRYWELL LINER /FLOCR' JUNCTION ADDITIWAL PEDESTA L OPENINGS TO PROMOTE EVEN DISTRIBUTION O

NEGATIVE IMPACTS LOCA CWSIDERATIONS SEISMIC INTERACTICNS F

ALARA CWCERNS s

ELEMENT 4 - CORE DEBRIS (Continued) c OVA LITATIVE BENEFIT LOW DEPENDENT ON ANALYTICAL M(I)ELS OF DEBRIS MOBILITY WHICH ARE VERY UICERTAIN o

WETWELL o

MCST PLANTS CURRENTLY HAVE CAPABILITIES TO HOLD WATER IN TORUS CHAMBER OR PROVIDE PROTECTI m TO CRITICAL EQUIPMENT IN CmNER R0mS o

QUALITATIVE BENEFITS LOW o

NO NEGATIVE IMPACTS o

NO FURTHER STUDY WARRANTED 4

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EEMENT 5 - TRAINING AND PRTEDURES

@JECTIVE:

ENSURE OPERATCRS ARE READY TO USE PLANT FEATURES TO BEST ADVANTAGE IN SEVERE ACCIDENTS REQUIREMENTS:

1.

C IEAR SYMPTm BASED STRATEGIES (INTEGRATED) 2.

REMOVAL OF UNNECESSARY INHIBITImS 3.

TRAINING /PRTEDURES IDCOR/BWROG EVALUATIONS:

o REV. 4 IMPEMENTATION BY Ail UTILITIES C WSISTENT WITH PREVI OJS PGT-TMI COMMITHENT o

PROPGE REVIEW 0F REV 4 WITH INSIGHTS FRm SEVERE AC,CIDENT STUDIES 9

4

CONCLUSIONS - BWR EXECUTIVE MEETING o

AUGUST 19 MEETING - 20 0F 23 BWROG UTILITIES REPRESENTED o

CONTINUE CONSTRUCTIVE DIALOGUE WITH NRC o

AGREEMENTS:

COMMIT TO IMPLEMENTATION OF REVISION 4 TO EPGS NUMARC CONTACTED TO CONSIDER SEVERE ACCIDENT CONTAINMENT ISSUE AS A GENERIC INDUSTRY ISSUE CONTINUE WORKING WITH NRC TO BETTER DEFINE ISSUES FOR RESOLUTION PROPOSE TO BWROG SEVERE ACCIDENT INSIGHT REVIEW 0F EPG REV. 4

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