ML20245F926

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Summary of 890613-15 Meetings W/Util in San Francisco,Ca Re PRA long-term Seismic Program.List of Attendees & Agenda Encl
ML20245F926
Person / Time
Site: Diablo Canyon  Pacific Gas & Electric icon.png
Issue date: 08/07/1989
From: Rood H
Office of Nuclear Reactor Regulation
To:
Office of Nuclear Reactor Regulation
Shared Package
ML20245F930 List:
References
TAC-55305, TAC-68049, NUDOCS 8908150134
Download: ML20245F926 (8)


Text

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August 7, 1989

+ DDCKET NOS.: 50-275-and 50-323 APPLICANT: PACIFIC GAS AND ELECTRIC COMPANY (PG&E)

FACILITY: DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2

SUBJECT:

SUMMARY

OF JUNE 13-15, 1989 PUBLIC MEETING TO DISCUSS PROBABILISTIC RISK ASSESSMENT, DIABLO CANYON LONG TERM SEISMIC PROGRAM (LTSP) (TAC NOS. 55305 ARD 68049)

On June 13-15, 1989 the NRC staff and its consultants from Brookhaven National

, Laboratory (BNL) met with PG&E in San Francisco, California to discuss selected l aspects of the probabilistic risk assessment (PRA) summarized in PG&E's Final l

Report on the Diablo Canyon Long Term Seismic Program. The purpose of the f meeting was to discuss the review findings by the NRC staff and BNL on the i solid state protection system, auxiliary feedwater system, and auxiliary saltwater (ASW) system. The staff and BNL also conducted an audit of PG&E's analysis of the selected components on June 15, 1989.

Attendees at the meeting e given in Enclosure 1. The agenda for the meeting is given in Enclosure 2. A copy of all the viewgraphs presented at the meeting

! has been transmitted to the meeting participants by PG&E letter dated July 25, I

1989. This material has been docketed (Accession number 8907310303)and.is

) available for public inspection at the PDR and the LPDR.

Action items for PG&E that resulted from the meeting are given in Enclosure 3.

The NRC staff requested that PG&E respond to these action items as soon as possible, so that the staff and BNL may continue their review in this area. A BNL letter dated June 29, 1989, summarizing the BNL observations from the meeting and documenting some of the details of the assumptions used by BNL in evaluating the Diablo Canyon ASW system, is attached as Enclosure 4.

original signed by Harry Rood, Senior Project Manager Project Directorate V Division of Reactor Projects - III, IV, Y and Special Projects

Enclosures:

1. Meeting Attendees
2. Meeting Agenda
3. Action Items for PG&E Response
4. BNL Letter Dated June 29, 1989 f cc: w/ enclosures - see next page DISTRIBUTION gl /

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August 7, 1989 ObCKETNOS.: SC-275 and 50-323 APPLICANT: PACIFIC GAS AND ELECTRIC COMPANY (PG&E)

FACILITY: DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2

SUBJECT:

SUMMARY

OF JUNE 13-15, 1989 PUBLIC MEETING TO DISCUSS PROBABILISTIC RISK ASSESSMENT, DIABLO CANYON LONG TERM SEISMIC PROGRAM (LTSP) (TAC N05. 55305 AND 68049)

On June 13-15, 1989 the NRC staff and its consultants from Brookhaven National Laboratory (BNL) met with PG&E in San Francisco, California to discuss selected aspects of the probabilistic ri:;k assessment (PRA) summarized in PG&E's Final Report on the Diablo Canyon Long Term seismic Program. The purpose of the meeting was to discuss the review findings by the NRC staff and BNL on the solid state protection system, auxiliary feedwater system, and auxiliary saltwater (ASW) system. The staff and BNL also conducted an audit of PG&E's analysis of the selected components on June 15, 1989.

Attendees at the meeting are given in Enclosure 1. The agenda for the meeting is given in Enclosure 2. A copy of all the viewgraphs presented at the meeting has been transmitted to the meeting participants by PG&E letter dated July 25, 1989. This material has been docketed (Accession number 8907310303)andis available for public inspection at the PDR and the LPDR.

Action items for PG&E that resulted from the meeting are given in Enclosure 3.

The NRC staff requested that PG&E respond to these action items as soon as possible, so that the staff and BNL may continue their review in this area. A BNL letter dated June 29, 1989, summarizing the BNL observations from the meeting and documenting some of the details of the assumptions used by BNL in '

evaluating the Diablo Canyon ASW system, is attached as Enclosure 4.

\

&n' Harry Rood, Senior Project Manager Project Directorate Y Division of Reactor Projects - III, IV, Y and Special Projects

Enclosures:

1. Meeting Attendees
2. Meeting Agenda
3. Action Items for PG&E Response
4. BNL Letter Dated June 29, 1989 cc: w/ enclosures - see next page

7 -i ,,

Mr. J. D. Shiffer Diablo Canyon Pacific Gas and Electric Company CC:

Richard F. Locke, Esq. NRC Resident Inspector Pacific Gas ~T Electric Company Diablo Canyon Nuclear Power Plant Post Office Box 7442 c/o U.S. Nuclear Regulatory Comission San Francisco, California 94120 P. 0. Box 369 Avila Beach, California 93424 Ms. Sandra A. Silver 660 Granite Creek Road Bruce Norton, Esq.

Santa Cruz, California 95065 c/o Richard F. Locke,-Esq.

Pacific Gas and Electric Company.

Post Office Box 7442 Mr. Peter H. Kaufman San Francisco, California 94120 Deputy Attorney General State of California 110 West A Street, Suite 700 Dr. R. B. Ferguson San Diego, Californie 92101 Sierra Club - Santa Lucia Chapter Rocicy Canyon Star Route Creston, California 93432 Ma'naging Editor The County Telegram Tribure P. O. Box 112 Chairman San Luis Obispo, California 93406 San Luis Obispo County Board of Supervisors Room 270 Ms. Nancy Culver County Government Center 192 Luneta Street San Luis Obispo, California 93408 San Luis Obispo, California 93401 Michael M. Stru m asser, Esq.

Regional Administrator, Region Y Special Assistant Attorney General U.S. Nuclear Regulatory Commission State of California 1450 Maria Lane Department of Justice Suite 210 _

3580 Wilshire Boulevard, Room 800 Walnut Creek, California 94596 Los Angeles, California 90010 Dr. Gerard C. Wong, Chief Radiological Materials Control Section State Department of Health Services-714 P Street, Office Building #8 Sacramento, California 95814

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Pacific' Gas and Electric Company .Diablo Canyon Long Term Seismic l-Program L

l CC*'

Dr. Keiiti Aki Dr. Steven M. Day Department of Geological Sciences Department of. Geological Science University Park San Diego State University University of~ Southern California San Diego, California 92182 Los. Angeles, California 90089-0741

. Dr. George Gazetas Dr. Ralph J. Archuleta Dept. of Civil Engineering Department'of Geological Sciences 212 Ketter Hall University of California Santa Barbara SUNY-Buffalo Santa Barbara, California 93106 Buffalo, New York 14260 Dr. Robert D.' Brown, Jr. Dr. Jean Savy U.S. Geological Survey Mail Code L-196 Mail Stop 977 Lawrence Livermore National-345 Middlefield Road Laboratory

.Menlo Park, California 94025 P. 0. Box 808 Livermore, California 94550 Dr. David B. Slemmons Center for Neotectonic Studies Dr.'Anestis S. Veletsos

.MacKay School of Mines 5211 Paisley Avenue University of Nevada-Reno Houston, Texas 77096 Reno, Nevada 89557-0047 Dr. Ken Campbell Dr. Robert Fitzpatrick U.S. Geological Survey Building 130 P.O. Box 25046, Mail Stop 966 Brookhaven National Laboratory Denver Federal Center Upton, New York 11973 Denver, Colorado 80225 Dr. C. J. Costantino Dr. M. K. Ravindra Building 129 EQE Brookhaven National Laboratory 3150 Bristol Street, Suite 350 Upton, New York 11973 Costa Mesa, California 92626 Dr. Michael Bohn Dr. J. Johnson Sandia Lab. - Organization 6412 EQE Post Office Box 5800 595 Market Street - 18th Floor Albuquerque, New Mexico 87185 San Francisco, California 94105

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l[ ENCLOSURE'1 l Attendees, Public' Meeting!on Probabilistic Risk Assessment Diablo Canyon Long. Term Seismic Program June 13 -15, 1989 fiAME - ORGANIZATION

.G. R. Andre- Westinghouse Dennis'C. Bley- PL&G(PG&E)

George Bozoki BNL (NRC)

Nilesh Chokshi NRC/RES/PRAB Lloyd S..Cluff.

. PG&E Pete Davis ACRSConsultant(NRC)

Bob Fitzpatrick .BNL(NRC)

_. Tom Grant -SAIC Glenn Kelly NRC/NRR/PRAB Barclay S. Lew PG&E

. James C. Lin. PL&G(PG&E)

Thomas J.~Mikschl PL&G (PG&E)

David.W. Ogden PG&E

.it. K. Ravindra EQE(NRC)

Harry Rood . NRC/NRR/PDV Mohamed Sahek BNL (NRC)

Bimal Sarkar Bechtel(PG&E)

Bruce D. Smith PG&E Raymond Thierry -PG&E M. R. Tresler PG&E-Bill White Bechtel(PG&E)

George C. Wu PG&E

)

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. ENCLOSURE 2 i

NRC/PG&E MEETING ON PROBABILISTIC RISK ASSESSMEhR DIABLO CANYON LONG TERM SEISMIC PROGRAM ONE CALIFORNIA STREET, ROOM 271 SAN FRANCISCO, CALIFORNIA, 94106 JUNE 13 - 15. 1989 AGENDA TUESDAY. JUNE 13. 1989 8:30 a.m. -Introduction NRC/PG&E 8:40 a.m. Meeting Organization Bruce Smith 8:45'a.m. Solid State Protection System Raymond Thierry 11:00 a.m. NRC Caucus NRC/BNL 11:30 a.m. NRC Comments' Harry Rood /Nilesh Chokshi 12:00 noon Lunch 1:00 p.m. Auxiliary Feedwater System Raymond Thierry 3:00 p.m. NRC Caucus NRC/BNL 3:30 p.m. -NRC Comments Harry Rood /Nilesh Chokshi 4:00-p.m. Adjourn WEDNESDAY. JUNE 14. 1989 8:00 a.m. Auxiliary Saltwater System Raymond Thierry Data Issues 10:00 a.m. Auxiliary Saltwater System Raymond Thierry Modeling Issues 12:00 noon' Lunch 1:00 p.m. Auxiliary Saltwater System Raymond Thierry Initiating Event Frequency 4:00 p.m. NRC Caucus NRC/P.NL

~4:30 p.m. NRC Comments Harry Rood /Nilesh Chokshi 5:00 p.m. Adjourn LSC/BDS:sjm 6/8/89

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NRC/PG1E NEETING ON PROBABILISTIC RISK ASSESSMENT DIABLO CANYON LONG TERN SEISNIC PROGRAN L ONE CALIFORNIA STREET, ROON 271 R

SAN FRANCISCO, CALIFORNIA, 94106

JUNE 13 - 15. 1989 TENTATIVE AGENDA THURSDAY. JUNE 15. 1989 8
00 a.m. Component Cooling Water System Raymond Thierry 11:00 a.m. NRC Caucus NRC/BNL

~

11:30 a.m. NRC Comments Harry Rood /Nilesh Chokshi 12:00 noon Lunch 1:00 p.m. Meeting Summary / Action Items Bruce Smith 2:00 p.m. Adjourn LSC/BDS:sjm 6/8/89

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EtlCLOSURE 3 ACTION ITEMS'FOR PG&E FROM PRA MEETING,' 06/13-15/89 l

1. PG&E is requested to provide the block diagram containing the Boolean equations used in the seismic risk quantification. This diagram was shown by-P6&E during the meeting.
2. While discussing the reduced model of the internal events sequences during the' meeting, a draft document was exhibited by PG&E.' This draft document contained notes'on at'least some of the sequences detailing some of the idiosyncracies built into them.~ Because this documentation would be extremely beneficial.to have while performing the leading sequence review, PG&E is requested to' provide this information.
3. The Diablo Canyon PRA assumes that a s. ingle ASW pump can be used to supply the full cooling needs of both units.(under all modes) given the other-three.. pumps.are not-available. The pump capability was briefly discussed.

at the meeting but no analysis was presented. PG&E is requested to

-provide additional information to justify this. assumption.

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