IR 05000312/1987029

Provides Summary of Significant Findings in Advance of Issuance of Insp Rept 50-312/87-29 to Ensure That Appropriate Corrective Actions Factored Into Restart Planning Activities

ML20236L059
Person / Time
Site:	Rancho Seco
Issue date:	11/06/1987
From:	Crutchfield D Office of Nuclear Reactor Regulation
To:	Andognini G SACRAMENTO MUNICIPAL UTILITY DISTRICT
References
NUDOCS 8711100091
Download: ML20236L059 (6)

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f2 zany.Jk UNITED STATES.

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g, NUCLEAR REGULATORY COMMISSION -

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November.6, 1987 Docket No. 50-312

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Mr. G. Carl Andognini Chief Executive Officer, Nuclear Sacramento Municipal Utility District Rancho Seco Nuclear Generating Station-i

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P.O. Box 15830, Mail Stop No. 291 Sacramento, California' 95852-1830

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Dear Mr. Andognini:

A special announced team inspection of the restart, activities'at' RanchoSeco

Nuclear Generating Station was conducted by NRC headquarters staff during the period September 28, 1987-October 9, 1987...The team discussed the inspection; findings with you and members of your staff during the course of this inspec-tion and at the exit meeting on October 9,:1987. -This letter provides a summary of the significant findings in advance of the inspection report (50-312/87-29) so that appropriate corrective actions may be factored into your-restart planning. activities. The findings listed below are only the more:

significant concerns-identified during the inspection and must~be resolved before restart. The findings below provide:neither a complete list;of ?inspec-tion concerns nor any of the strengths identified by the inspection team. ' A complete discussion of all the inspection findings.will be provided in'

Inspection Report 50-312/87-29.

1.

New items identified during inspection 87-29:

a.

The procurement and material handling control-programs may not

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i provide adequate assurance that quality' class level:I fasteners would be used for all safety-related applications.

This finding may also-apply to the procurement of other material and equipment.

b.

The safety feature actuation system (SFAS) ' signals to the Nuclear i

Service Water (NSW) pumps appear to be defeated by the NSW Surge Tank LO-LO level contacts which are actuated by nonsafety-related level instruments.

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c.

The air compressors and associated downstream piping to the al accumulators for emergency diesel generators GEA2 and GEB2 were d$

designed as nonsafety-related, although it appears that air is

$81 required _ for continuous operation of these emergency diesel genera-pg tors. Additionally, the overpressure protection.for.the air compres-mo sors appears to be set above-the rating for.the compressors. The g

team understands that these issues are being addressed as-part of the

$g safety analysis for the new emergency diesel generators, oo-

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d.

There may not be_ adequate fire protection for emergency diesel Q

generators GEA and GEB.

Electrical cables for' diesel: generator GEA bo'

run outside the room where diesel generator GEB is located and the-

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door separating the spaces doesTnot appear to meet the National' Fire

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Mr. G. Carl Andognini

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November 6, 1987-

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' Protection: Association Code requirements. - Additionally, the 'poten-tial may exist for flooding in one emergency diesel generator room causing flooding in the other emergency diesel generator room.

' 2.

Restart. items' remaining open from inspection 86-41:

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a.

Conduct testing and modify operating procedures to resolve turbine-driven Auxiliary Feedwater (AFW) pump (P-318) overspeed.

concerns (86-41-01).

b.

Resolve Main Feedwater.(MFW) System Status Report (SSR)-Problems i

(86-41-07)

(1) Correct Casualty Procedure C.26 for MFP operation with low condenser vacuum (Problem 18).

-(2) ' Main Feed Pump'(MFP) control from Lovejoy to Bailey. Hand / Auto Station is not performing as designed (Problem 31).-

c.

Revise Operating Procedure A.61, ".125' Volt DC System," to correct-identified deficiencies (86-41-11).

h d.

Resolve 120 Vac SSR Problems (86-41-12)-

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i (1) Dedicate a spare circuit breaker and the temporary' cable required to provide an alternate power supply to motor-operated valve PSV-21511.

1 (2) Physically mark the circuit breakers on Westinghouse power.

panels SIA3, SIA4, S183 and SIB 4 to aid in detection of a tripped circuit breaker.

(3) Develop casualty procedures for loss of 120 Vac vital buses (Problem 5).

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e.

Resolve 480 Vac SSR Problems (86-41-13).

(1) Add the springs required to ensure the circuit breaker-operating handle moves to the trip position for breakers 2A317,

28317 and 2A208A (Problem 16).

(2) Revise 480 Vac System Casualty procedures to correct identified deficiencies (Problem 11).

(3) Revise Operating Procedure A.59 "480 Vac System Operating Procedure"(Problems 25,33and34).

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Novemb'r 6, 1987 Mr. G. Carl Andognini-3-e

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f.

Resolve 4160 Vac System Vac Problems (86-41-14).

(1) Add indicating lights for AFW pump P-319.

(2) Modify the undervoltage trip' logic for circuits ' associated with buses 4A, 4B, 4A2 and 482.

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CalibratetheCondensateStorageTanklevelinstrument(LI35803)

and determine proper AFW pump capacity and operability (86-41-28).

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Develop adequate procedures.for implementing the inservice test l_

program requirements for the AFW system (86-41-30).

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Develop adequate procedures for surveillance of the battery chargers

(86-41-31).

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Revise Operating Procedure A.51 " Auxiliary Feedwater System" to correct identified deficiencies (86-41-33).

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Develop operating guidance for recognition and action'during AFW pump runout conditions-(86-41-34).

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Develop maintenance procedures for safety-related air-operated valves (86-41-36).

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Implement an effective QA Surveillance Program (86-41-39).

No response is required to this letter since Inspection Report 50-312/87-29 detailing the inspection findings and concerns will be issued in the near future.

Sincerely, I

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Dennis M. Crutchfield, Di ctor Division of Reactor'Proj cts III, IV, V and Special Projects Office of Nuclear Reactor Regulation i

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See next page

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Mr. G. Carl Andognini-4-November 6, 1987

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i cc: Mr. John Vinquist Mr. Joseph 0. Ward, Chief

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Sacramento Municipal Utility District Radiological Health Branch 14440 Twin Cities Road State Department of Health Services

Herald, California 95638-9799 714 P Street Office Building #8

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Sacramento, California 95814 Mr. Gordon K. Van Vleck Sacramento County Secretary, Resources Agency Board of Supervisors 1416 9th Street, Room 1311 827 7th Street, Room 424 Sacramento, California 95814 Sacramento, California 95814 Mr. David S. Kaplan, Secretary Ms. Helen Hubbard and General Counsel P. O. Box 63 Sacramento Municipal Utility District Sunol, California 94586 6201 S Street P. O. Box 15830 Sacramento, California 95813 Thomas A. Baxter, Esq.

Shaw, Pittman, Potts & Trowbridge 2300 N Street, N.W.

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Washington, DC 20037 Mr. Karl Meyer Sacramento Municipal Utility District Rancho Seco Nuclear Generating Station 14440 Twin Cities Road Herald, California 95638-9799 Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 220, 7910 Woodmont Avenue Bethesda, Maryland 20814, Resident Inspector / Rancho Seco c/o. U.S. Nuclear Regulatory Commission 14440 Twin Cities Road Herald, California 95638-9799 Director

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Energy Facilities Siting Division Energy Resources Conservation and Development Commission 1516 - 9th Street Sacramento, California 95814

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DATE :10/2//87

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