ML19323E133

Advises of Receipt of WPPSS Re 150 Violations of Separation Criteria Uncovered in Review of Control Room Equipment & Sys.Requires plant-wide Field Audit of Electrical Equipment & Sys

ML19323E133
Person / Time
Site:	LaSalle
Issue date:	05/07/1980
From:	Youngblood B Office of Nuclear Reactor Regulation
To:	Peoples D COMMONWEALTH EDISON CO.
References
NUDOCS 8005230030
Download: ML19323E133 (2)

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j NUCLEAR REGULATORY COMMISSION

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pp 7 1930 Docket Nos.

50-373 and 50-374 Mr. D. Louis Peoples Director of Nuclear Licensing Commonwealth Edison Company P. O. Box 767 Chicago, Illinois 60690

SUBJECT:

SEPARATION OF ELECTRICAL EQUIPMENT AND SYSTE!1S AT f!UCLEAR POWER PLANTS We would like to advise you of a letter (Enclosure 1) dated August 16,1979, to the Office of Inspection and Enforcement from the Washington Public Pcwer Supply System (WPPSS).

In that letter WPPSS advised us that a review of the equipment and systems installed in the control room of the WPPSS Nuclear Project No. 2 uncovered over 150 instances of violations of separ: tion criteria.

In view of the large number of violations cited in the WPPSS letter for the control room, and the apparent ease with which they occur anywhere in the plant, we require that you conduct a plant wide field audit of your installed electric equipment and systems to determine conformance to your stated criteria. specifies the procedures to be used for conducting an attachment electrical separation field audit at your facility.

In audits performed at other facilities we noted that those reviews lacked two essential aspects of our proposed audit:

(1) the task group was not composed of persons other than those who performed the initial design and installation, and (2) the review concentrated on Class IE circuits to the exclusion of associated circuits.

Please pay particular attention to these two areas.

Within fif. teen days of receipt of this letter, please advise us of your intent to comply with our requirements as specified in Enclosure 2.

Sincerely,

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r B. 3 Y)ungbl d, Chief Licensfng Branch No. 1 Division of Licensing

Enclosures:

As stated 800-5230030

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J 2-Mr. D. Louis Peoples cc: R1cna rd E. Powell, Esq.

Ishan, Lincoln & Beale One first National Plaza 2400 Chicago, Illinois 60670 Dean Hansell, Esq.

Assistant Attorney General State of Illinois 188 West Randolph Street Suite 2315 Chicago, Illinois 60601 Mr. Roger Walker, Resident Inspector U. S. Nuclear Regulatory Commission P. O. Box 737 Streator, Illinois 61364 E

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P O. Dos 9 4 8 3 000 G e o. W a ss.*=s tose $w a s mc=6. o.was.orow 39332 P=o=s (S O9) 37S 3000 August 16, 1979 G02-79-145

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Attention:

Mr. R. H. Engelken, Director

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Subject:

WPPSS fiUCLEAR PROJECT NO. 2 DOCKET flu'18ER 50-397, CPPR-93 REPORTABLE DEFICIEllCY - 10CFR50.55(e)

Dear Mr. Engelken:

In accordance with the provisions of 10CFR50.55(e), your staff was informed by telephone on July 16, 1979, of a reportable deficiency involving Plant Electrical Separation.

Attached is ous-report concerning this deficiency.

Please contact es if you have any questions.

t Very truly yours, bd D. L. REf!BERGER Assistant Director Technology DLR/GWB/in Attachment i

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WPPSS NUCLEAR PROJECT NO. 2 REPORTABLE DEFICIENCY AND CORRECTIVE ACTION PLANT ELECTRICAL SEPARATION WASHINGTON PUBLIC POWER SUPPLY SYSTEM DOCKET NO. 50-397 LICENSE N0. CPPR-93 Description of Deficiency To date the Plant Main Control Room has been reviewed and approximately 150 instances have been discovered involving violations in the appli-cation of 'nNF-2 Electrical Separation Criteria to safety related cables and panel wiring.

In general, the deficiencies involved incorrect label-ing, routing, termination, or power source of safety related cabling within PGCC or Control Room Panels.

Examples of deficiencies found are as. follows:

1.

Division 3 HPCS instrumentation powered from a Division i source; 2.

Division 3 HPCS cables routed in Division 1 PGCC ducts and Division 1 cable trays in the cable spreading room.

Safety Implication The deficiencies found to date could have resulted, under single failure conditiens, in the simultaneous loss of redundant safety related equip-ment with possible subsequent loss of safety function.

Corrective Action A task force is currently reviewing the Main Control Room and plant areas for othar violations of WNP-2 Separation Criteria in all safety related applications.

The WNP-2 7eparation Criteria has been refined and clarified and is being used by the reparation Task Force as criteria by which to judge plant separation as dasigned and installed.

This same criteria will be submit-ted in an FSAR amendment.

All instances of deficiencies identified as criteria violations will be evaluated and corrected via Project Engineering Directives (PED's) to the appropriate contractor.

The task force is working to an action plan which to date has resulted in the completion of the MairF Control Room review and identification of de-ficiencies as described above.

The remainder of the review which includes such things as MCC's, Local Panels, etc., is scheduled to be complete by October of 1979.

Note that ongoing reviews will be conducted as warranted by construction completion.

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your FSAR, (e.g., Tsegulati:n Guide '.75). /. /26 This audit should include a sarsic n:: Icss

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and cables, and shculd ce;hasi:c. b;; n : r.ccess:ri'.y be 'iri:c: :::

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who unders *.and the criteria, s.andards a.: guices re'.1:it.; :: ;r.e sc::r: ;on of electric equipment a.c systems, anc wn:. sera n:: :.volved ir. :ha desi n a.d 3

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nume.cus violations arc uncoverec.

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