ML20042A800

Forwards Request for Addl Info to Complete Review of 800506 Response to IE Bulletin 80-04, Analysis of PWR Main Steam Line Break W/Continued Feedwater Addition

ML20042A800
Person / Time
Site:	Rancho Seco
Issue date:	03/15/1982
From:	Stolz J Office of Nuclear Reactor Regulation
To:	Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT
References
IEB-80-04, IEB-80-4, TAC-46855, NUDOCS 8203240093
Download: ML20042A800 (4)

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DISTRIBUTI0ll:

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Docket flo. 50-312 ffPadovan

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D EBlackwood JDonohew Mr. J. J. Hattinoo

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Sacranento, California 95813.

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SUBJECT:

PWR !!AIN STEAM LIrlE BREAK'WI' Tit C0llTIflUED FEEDWATER ADDITI0ff y

- REQUEST FOR ADDITI0flAL IrlFOR!!ATION He have conpleted our review of your.!!qy 6,1980 letter that replied to IE Bulletin 80-04 " Analysis of a PWR Main Steam Line Break with Con-tinued Feedwater Addition".

IE Bulletin 80-04 requested you to review the containment pressure response to a main steam line break (ItSLB)-

accident to deternine the ir. pact of runout flow from the auxiliary feedtatcr (ARI) system. Your msponse indicated that in the event of a ItSLU, main feedwater -(Iml) would be automatically isolated and ARI to both steam generators would be automatically initiated. Upon identi-fication;of the affected stesa generator, AW to the steam; generator t

would be.nanually isolated in accordance with established energcncy I

procedures. Ilowever, the time required for these operator. actions was not specified in your submittal. Consequently, please give us the infomation requested in the enclosure within 45 days of receipt of this -

letter.

1he reporting requirements contained in this letter affect fewer than ten respondents; therefore, O!B clearance is not required under P. L.96-511.

Sincerely, cORICI:GL lJIC:':337

\\7050. 004"'

John F. Stolz, Chief Operating Reactors Branch #4 Division of L,1 censing 1

Enclosure:

Requast for Additional Infomation cc w/ enclosure: See next page RB SA C-

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3) 12/82 3/ p""2 '

s2o324oo93 e203is ggDRADOCK05000 OFFICIAL RECORD COPY usom iesi-ass-seo

l Sacramento Municipal Utility Ranch 3 Seco, Docket No. 50-312 District ccw/ enclosure (s):

' David S. Kaplan, Secretary and Christopher Ellison, Esq.

General Counsel Dian Grueuich Esq.

Sacramento Itunicipal Utility California Energy Comission District 1111 Howe Avenue 6201 S Street Sacramento, California 95825 P. O. Box 15830 Sacramento, California 95813 Ms. Eleanor Schwartz California State Office 600 Pennsylvania Avenue, S.E., Rm. 201 Sacramento County Board of Supervisors Washington, D. C.

20003 827 7th Street, Room 424 Sacramento, California 95814 Docketing and Service Section Office of the Secretary Business and Municipal Department U.S. Nuclear Regulatory Commission Sacramento City-County Library Washington, D. C.

20555 828 I Street Resident Inspector / Rancho Seco Sacramento, California 95314 c/o U. S. N. R. C.

14410 Twin Cities Road Herald, CA 95638 Dr. Rir.hard F. Cole Atomic Safety S Licensing Board Panel U.S. Nuclear Regulatory Commission Washington, D. C.

20555 Regional Radiation f.epresentative EPA Reaion IX.

Mr. Frederick J. Shon 215 Fremont Street, Atomic Safety and Licensing Board San Francisco, California 94111 Panel U.S. Nuclear Regulatory Commission Mr. Robert S. Borsum Washington, D. C.

20555 Babcock & Wilcox Nuclear Pcwer Generation Division Elizabeth S. Bowers, Esq.

Suite 220, 7910 Woodmont Avenue Chairman, Atomic Safety and Bethesda, Maryland 20814 Licensing Board Panel U.S. Nuclear Regulatory Comission Thomas Baxter, Esq.

Washington, D. C.

20555 Shaw, Pittman, Potts & Trowbridge 1800 M S'.reet, N.W.

Washington, D. C.

20036 i

Herbert H. Brown, Esq.

Lawrence Coe Lanpher, Esq.

Hill, Christopher and Phillips, P.C.

1900 M Street, N.W.

Atomic Safety and Licensing Board Washington, D. C.

20036 Panel U.S. Nuclear Regulatory Commission Helen Hubbard W:shington, D. C.

20555 P. O. Box 63 Sunol, California 94586

Sacramento Municipal Utility '

District Atomic Safety and Licensing Appeal Mr. Robert H. Engelken, Regional Administrator U. S. Nuclear Regulatory Commission, Region V Board Panej U.S. Nuclear Regulatory Commission 1990 N. California Boulevard, Suite 202 Washington, D. C.

20555 Walnut Creek, California 94596 Alan S. Rosenthal, Chairman Atomic Safety and Licensing Appeal Board U. S. Nuclear Regulatory Connission Washington, D. C.

20555 Dr. John H. Buck Atonic Safety and Licensing Appeal Board U. S. Nuclear Regulatory Conmission Washington, D. C.

20555 Christine U. Kohl Atomic Safety and Licensing Appeal Board U. S. Nuclear Regulatory Commission Washington, D. C.

20555 California Department of Health ATTN: Chief, Environmental Radiation Control Unit Radiological Health Section 714 P Street, Room 498 Sacramento, California 95314 1

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Enclosure REQ"EST FOR ADDITIONAL INFORMATION s

Please give us the following information I)

Identify what actions must be performed by the operator to:

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1) identify the affected steam generator and

2) isolate the AFW flow.

Please provide the times required to perform these actions, along with justifications for your assumptions.

II) For a MSLB with no operator action taken, will containment design pressure be exceeded?

If so provide: '1) tho time required to reach design pressure and peak pressure, 2) the magnitude of the peak pressure.

III) Provide an evaluation of the ability of the AFW pumps to continue to run without damage at runout flow for 30 minutes.

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