ML13302B034

Summary of 810310 Meeting W/Utils in Bethesda,Md Re Explosion Hazards.Attendance List & Applicant Handouts Encl

ML13302B034
Person / Time
Site:	San Onofre
Issue date:	04/13/1981
From:	Rood H Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 8104210160
Download: ML13302B034 (15)

Text

Docket Nos.: 50-361/362 APPLICANTS:

SOUTHERN CALIFORNIA EDISON COMPANY (SCE)

SAN DIEGO GAS AND ELECTRIC COMPANY (SDG&E)

FACILITY:

SAN ONOFRE NUCLEAR GENERATING STATION, UNITS 2 AND 3

SUMMARY

OF SAN ONOFRE MEETING ON EXPLOSION HAZARDS On March 10, 1981, members of the NRC staff met with the applicants in Bethesda, Maryland to discuss the above subject. Attendees at the meeting are given in Enclosure 1. The material presented by the applicants at the meeting is given in Enclosure 2. At the conclusion of the meeting, the staff indicated that the material presented by the applicants at the meeting should be submitted on the docket for staff review.

Harry Rood, Project Manager Licensing Branch No. 3 Division of Licensing cc: See next page.

0 OFFICE)

DL LB3 RATE) 4/10/8 NRC FORM 318 (10/80) NRCM 0240 O FF ICIAL REECOR D COPY usaPO 1980-329-824

MEETING

SUMMARY

DISTRIBUTION Docket. File G. Lear NIRC PUR Local PDR S. Pwi ck i NSIC V. BonV aroy TERA Z. Rosztoczy LBli3 Reading W. Haass H. Denton D. Mul 11r E. Case R. Ballard D. Eisenhut W. Regan P. Purple R. Mattson B. J. Ycungblood P. Check A. Schwencer F. Miraglia

0. Parr J. Miller F. Rosa G. Lainas W. Butler R. Vollmer W. Kreger J. P. Knight R. Houston R. Bosnak T. Murphy F. Schauer L. Rubenstein R.- E. Jackson T. Speis Project Manager H. Rood W. Johnston Attorney, OELD J. Stolz J.. Lee S. Hanauer OE (3)

W. Gaimill ACRS (16)

T. Murley R. Tedesco F. Schroeder D. Skovhol t M. ErrisL NRC Particinants:

R. Bacr C. Berlingor L. Soffer K. Kniel K. Campe G. Knigh Lon A. Thadani D. Tondi J. Kramer D. Vassallo P. Collins D. Ziemann E. Adensam bcc:

Applicant & Service List

tkREG&

0 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 APR 1 3 1981 Docket Nos.:

50-361/362 APPLICANTS:

SOUTHERN CALIFORNIA EDISON COMPANY (SCE)

SAN DIEGO GAS AND ELECTRIC COMPANY (SDG&E)

FACILITY:

SAN ONOFRE NUCLEAR GENERATING STATION, UNITS 2 AND 3

SUMMARY

OF SAN ONOFRE MEETING ON EXPLOSION HAZARDS On March 10, 1981, members of the NRC staff met with the applicants in Bethesda, Maryland to discuss the above subject. Attendees at the meeting are given in Enclosure 1. The material presented by the applicants at the meeting is given in Enclosure 2. At the conclusion of the meeting, the staff indicated that the material presented by the applicants at the meeting should be submitted on the docket for staff review.

Harry Rood, Project Manager Licensing Branch No. 3 Division of Licensing cc:

See next page.

Mr. Robert Dietch Vice President Southern California Edison Company 2244 Walnut Grove Avenue P. 0. Box 800 Rosemead, California 91770 Mr. D. W. Gilman Vice President -

Power Supply San Diego Gas & Electric Company 101 Ash Street P. 0. Box 1831 San Diego, California 92112 cc:

Charles R. Kocher, Esq.

James A. Beoletto, Esq.

Southern California Edison Company 2244 Walnut Grove Avenue P. 0. Box 800 Rosemead, California 91770 Chickering & Gregory ATTN:

David R. Pigott, Esq.

Counsel for San Diego Gas & Electric Company &

Southern California Edison Company 3 Embarcadero Center - 23rd Floor San Francisco, California 94112 Mr. George Caravalho City Manager City of San Clemente 100 Avenido Presidio San Clemente, California 92672 Alan R. Watts, Esq.

Rourke & Woodruff Suite 1020 1055 North Main Street Santa Ana, California 92701 Lawrence Q. Garcia, Esq.

California Public Utilities Commission 5066 State Building San Francisco, California 94102 Mr. V. C. Hall Combustion Engineering, Incorporated 1000 Prospect Hill Road Windsor, Connecticut 06095

Mr. Robert Dietch

- 2 Mr. 0. W. Gilman cc:

Mr. P.. Dragolovich Bechtel Power Corporation P. 0. Box 60860, Terminal Annex Los Angeles, California 90060 Mr. Mark Medford Southern California Edison Company 2244 Walnut Grove Avenue P. 0. Box 800 Rosemead, California 91770 Henry Peters San Diego Gas & Electric Company P. 0. Box 1831 San Diego, California 92112 Ms.. Lyn Harris Hicks Advocate for GUARD 3908 Calle Ariana San Clemente, California 92672 Richard J. Wharton, Esq.

Wharton & Pogalies University of San Diego School of Law Environmental Law Clinic San Diego, California 92110 Phyllis M. Gallagher, Esq.

Suite 222 1695 West Crescent Avenue Anaheim, California 92701 Mr. A. S. Carstens 2071 Caminito Circulo Norte Mt. La Jolla, California 92037 Resident Inspector, San Onofre/NPS c/o U. S. Nuclear Regulatory Commission P. 0. Box AA Oceanside, California 92054

ENCLOSURE 1 ATTENDEES 3/10/81 MEETING ON SAN ONOFRE 2/3 EXPLOSION HAZARDS NAME ORGANIZATION H. Rood NRC-DL S. H. Freid Bechtel Alfredo Lopez Bechtel L. Soffer NRC/NRR/DE K. Campe NRC/NRR/DE Frederick P. Nandy SCE-Licensing T. E. Richardson Bechtel Geoff Kaiser NUS Ronald Broadhurst NUS Corp.

Michael Cheok NUS E. R. Schmidt NUS

ENCLOSURE 2 W

5 CONSERVATISMS

-w wa 0 CRITERIA CONSERVATIVE RELATIVE TO 10CFR100 0 ALL 1-5 ACCIDENTS ASSUMED AT NEAR EDGE OF RIGHT-OF-WAY 0 ALL TANK TRUCKS ASSUMED AT MAXIMUM SIZE 0 EXPLOSIVE YIELD NEAR MAXIMUM 0 NEGLECTED CHANGES IN TANK CARS TO REDUCE PUNCTURE 50 - 90%

0 NO MASSIVE STRUCTURES ON I-5 TO CAUSE GROSS TANK FAILURE 0 INSTANTANEOUS PUFF RELEASE 0 CONSERVATIVE DISPERSION CONSIDERED GRAVITY SLUMPING FOLLOWED BY ATMOSPHERIC TURBULENCE O ENTIRE QUANTITY IN PUFF UTILIZED IN OVERPRESSURE ANALYSIS 0 PLANT AREA POTENTIALLY AFFECTED BY OVERPRESSURE AND FLAMMABLE CLOUD IS CONSERVATIVE 3/10/81 1

BUILDINGS CAN WITHSTAND PEAK OVERPRESSURE OF 7PSI ANALYSIS ASSUMES PEAK OVERPRESSURES IN EXCESS OF 7PSI LEAD TO UNACCEPTABLE CONSEQUENCES.

3/10/81 2B

BUILDINGS CAN WITHSTAND PEAK OVERPRESSURE OF 7PSI BASED ON:

ACI CODE 349-76, APPENDIX C - ENERGY BALANCE TECHNIQUES FLEXURAL DUCTILITY RATIOS NOT EXCEEDING 3.0 ULTIMATE LOAD RESISTANCE BY YIELD-LINE METHODOLOGY ANALYSIS ASSUMES PFAR OVERPRESSURES IN EXCESS OF 7PSI LEAD TO UNACCEPTABLE CONSEQUENCES.

3/10/81 2A

DISTRIBUTION OF ACCIDENT LOCATIONS ON SOUTHBOUND 1-5 WEST EDGE OF RIGHT-OF-WAY 0.21 WEST EDGE OF ROADWAY 0.37 CENTER OF ROADWAY 0.26 EAST EDGE OF ROADWAY 0.16 PROBABILITY OF ACCIDENT AT SPECIFIED LOCATION BASED ON ACCIDENT DATA OF 1-5 NEAR PLANT 3/10/81 3

0 SIXTY PERCENT OF LPG SHIPMENTS ARE TANDEM TRAILERS 0 ONLY SINGLE CONTAINER (5000 GAL) INVOLVED IN VAPOR CLOUD DETONATION 0 NO KNOWN TRANSPORTATION ACCIDENT IN WHICH CONTENTS OF MORE THAN ONE TANK CONTRIBUTED TO VAPOR CLOUD EXPLOSION 3/10/81

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PROBABILITY OF SIGNIFICANT EXPLOSION PER TRAIN MILE REDUCED BY HALF BECAUSE OF IMPROVED COUPLERS AND HEAD SHIELDS, EXPERT ESTIMATES GIVE 85% REDUCTION RECENT ACCIDENT DATA SUPPORT THESE ESTIMATES 3/10/81 6

REALISTIC PROBABILITY OF EXCEEDING 10CFR10 GUIDELINES PROBABILITY CONTRIBUTOR 10-7/yg LPG ON 1-5 0.57 LPG ON ATSF 0,53 OTHERS 0 02 TOTAL 1,1 THUS THE PROBABILITY OF UNACCEPTABLE CONSEQUENCES RESULTING FROM EXPLOSIONS MEETS THE ACCEPTANCE CRITERIA OF SRP 2.2.3 3/10/81 7

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