ML20138R338

Forwards SER Accepting Util Response to Generic Ltr 83-28, Items 4.2.1 & 4.2.2 Re Reactor Trip Sys Reliability,Provided That Util Confirms That Undervoltage Trip Armature Down When Roller rivet-armature Clearance Measured

ML20138R338
Person / Time
Site:	Rancho Seco
Issue date:	12/17/1985
From:	Stolz J Office of Nuclear Reactor Regulation
To:	Reinaldo Rodriguez SACRAMENTO MUNICIPAL UTILITY DISTRICT
Shared Package
ML20138R340	List: ML20138R338 ML20138R343
References
GL-83-28, TAC-53144, NUDOCS 8512310187
Download: ML20138R338 (2)

Text

December 17, 1985 ,

s.

Docket No. 50-312 DISTRIBUTION- SMiner

'n56cket File GKalman NRC POR RWeller L PDR Ringran Mr. Ronald J. Rodriguez PBD-6 Rdg ACRS-10 Assistant General Manager, Nuclear FMiraglia Gray File Sacranento Municipal Utility District 0 ELD EBrach  !

6201 S Street EJordan H0rnstein P. O. Box 15830 BGrimes Sacramento, California 95813 JPartlow l i

SUBJECT:

RANCHO SECO NUCLEAR GENERATING STATION - REACTOR TRIP SYSTEM RELIABILITY, ITEMS 4.2.1 AND 4.2.2 ON GENERIC LETTER 83-28 We have completed our review of the information you provided on the ,

Preventative Maintenance Program for Reactor Trip Breakers - Maintenance and  !

Trending, Items 4.2.1 and 4.2.2 of Generic Letter 83-28.

Based on our review, as described in the enclosed Safety Evaluation, we find that your positions on Items 4.2.1 and 4.2.2 are acceptable provided that you confirm that when you measure the roller rivet-armature clearance in the  !

Under Voltage Trip (UVT) device the UVT armature is down in the energized  ;

position, as recommended by IE Notice No. 85-58. Within 30 days of receipt '

of this letter please confirm in writing that this procedure is followed at Rancho Seco.

The reporting and/or recording keeping requirements contained in this letter ,

affect fewer than ten respondents, therefore OMB clearance is not required l under P.L.96-511. l Sincerely,

=sto1:W. :::c:a;J Li JU.2 J. E2 % 4*  ;

John F. Stolz, Director PWR Project Directorate #6 Division of PWR Licensing-B

Enclosure:

As Stated cc w/ enclosure:

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PDR ADOCK 05000312 '

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E f Ftr. R. J. Rodriguez j Sacramento Municipal Utility District Rancho Seco Nuclear Gar.eratin]

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I cc: ,

i Mr. David S. Kaplan, Secretary Sacramento County and General Counsel Board of Supervisors Sacramento Municipal Utility 827 7th Street, Room 424 District Sacramenta, California 95814 6201 S Street P. O. Box 15330 Ms. Helen Hubbard Sacramento, California 95813 P. O. Box 63 '

Sunol, California 94586 Thomas Baxter, Esq. ,

Shaw, Pittman, Potts & Trowbridge

1800 M Street, N.W.

~'

Washington, D.C. 20036 t

I Mr. Robert B. Borsum

! Babcock & Wilcox

! Muclear Power Generation Division .

Suite 220, 7910 Woodmont Avenue f .

Bethesda, Mary 1'and 20814 '

Resident Inspector / Rancho Seco c/o U. S. N. R. C.

14410 Twin Cities Road Herald, California 95638 L

Regional Administrator, Region V U.S. iluclear Regulatory Commission

' 1450 Maria Lane, Suite 210 ,

Walnut Creek, California 94596  !

Director Energy Facilities Siting Division Energy Resources Conservation &

Development Commission '

1516 - 9th Street ,

Sacramento, Ct.lifornia 95814

Mr. Joseph 0. Ward, Chief

)

I Radiological Health Branch State Department of Health Services

' 714 P Street, Office Building #8 Sacramento, California 95814 r

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