ML20125B904

Forwards WPPSS Indicating Over 150 Violations of Separation Criteria in Control Room.Requires Audit of Installed Electric Equipment to Determine Conformance

ML20125B904
Person / Time
Site:	North Anna
Issue date:	11/29/1979
From:	Parr O Office of Nuclear Reactor Regulation
To:	Proffitt W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
References
NUDOCS 7912310114
Download: ML20125B904 (3)

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n arcoq'o UNITED iTATES

!'y),, 'j NUCLEAR REGULA IORY COMMISSION p WASHINGTO 1 D. C. 20555

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Docket No.: 50-339 Mr. W. L. Proffitt Senior Vice President Power Operations Virginia Electric and Power Company P. O. Box 26666 Richmond, Virginia 23261

SUBJECT:

SEPARATION OF ELECTRICAL EQUIPMENT AND SYSTEMS AT . NUCLEAR POWER PLANTS We would like to advice you of a letter (Enclosure 1) dated August 16, 1979 to the Office of Inspection and Enforcement from the Washington Public Power Supply System which indicates 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 separation criteria.

In view of the large number of violations cited in the letter of August 16, 1979 for the control room, and the apparent ease with which they can 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. I i

Enclosure 2 specifies the procedures to be used for conducting an acceptable electrical separation field audit at your facility.

Within fifteen days of receipt of this letter, please advise us of your l intent to comply with our requirements as spec 1fied in Enclosure 2.

Sincerely, Diab.bParr .h Cnie f Light Water Reactors, Branch No. 3 Division of Project Management

Enclosures:

As Stated cc: See Next Page 90003101 7912810/[y _f

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1 Mr. W. L. Proffitt t

i cc: Mr. Anthony Cambaradella Cl arence '. 0 ;ms , s r . , :. s q .

Of fice of the Attorney General 1700 Pennsyl vani a A,en .e , N...

11 South 12th St reet - Room 308 Washington,.7. C.  : <ce Richmond, Virginia 23219 Ca rroll J. :a va;a , is .

Richard M. Foster, Esq. 17LO Pennsy'. vari a A.e: . > . ' . . . .

211 St ribling Avenue Wasnington , D. C. ..~i Charlottesville, Virginia 22903 "r . vam es C . C u ns tar.

Michael W. Maupin, Esq. State Corporation Co: ss i on Hunton , Williams, Gay & Gibson Cornonvcaltn of V; rg:m a P. O. Box 1535 Slendon Bu:iding Richmond , Vi rginia 23212 Ri ch:.:ond , Vi rgini a .3Cc.

Mrs. June Allen Alan S. Rosenthal , Esc.

412 Owens Drive Atomic Sa fety anc Li cens: ~r cin , t.e. <

bant sville , Al abama 35801 U.S. Nucl ear Peg ul atery C.cr .:i ss ; :n hasnington, 3. C. 2;555 f'r. James Torson 501 Leroy Micnael C. Farrar , Lsu.

Socorro , New Mexico 87801 Atomic Safety anc Licers:m A ;'eal Coerd U.S. Nuclear Re9ulatory Con. :ssion Mrs. Margaret Dietrich Washington , C. C. 2Cibb Route 2, Box 566 Gordonsville, Virginia 22942 Cr. John H. Ducs At cmic Sa fety and Li censi .c c;;; cal Ccard Willi an H. Rodgers , Jr. , Esq. U.S. Nuclear Regulatory Cem :ssicn Georgetowi University Law Center Washington, D. C. ZL5bb 600 New Jersey Avenue , N.W.

Washi ngton , D. C. 20001 Atomic Sa fety are Li cens: n reare fanci U.S. Nuclear Regulatery Corn:ssian fr. Peter S. Hepp Washington , D. C. 2L55b Executive Vice President Sun Shipping & Dry Dock Company Mr. Micnael S. J ..o....... s o o o c . .. w . . . . . . . .. >v . ,

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August 16, 1979

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fluclear Regulatory Commission NlI Region V kfyjg'*.Q,g gh{1'r t' [3,,9 { d'i..',. -[ ....:, ( .

Suite 202, Walnut Creek Plaza F s y 'y' 1900 ti. California Boulevard p ' k . ;.. ; ;'. f .5

'..'alnut Creek, Califorr.ia 94595 .. .

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' (.s , -s . : \y Attention: Mr. R. H. Engelken, Director .,y

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Subject:

WPPSS iUCLEAR PROJECT i;0. 2 DOCKET liU:4BER 50-397, CPPR-93 REPORTABLE DEFICIEilCY - 10CFR50.55(e)

Dear fir. Engelken:

In accordance with the provisions of 10CFR50.55(c), your staff was informed by telephone on July 15, 1979, of a reportable deficiency involving Plant Electrical Separation.

i Attached is our report concerning this deficiency.  !

,Riease contact us if you have any questions, a

Very truly yours, i

i M M b" @

D. L. RE!,BERGER Assistant Director I Technology DLR/GWB/in Attachment 90003104

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WPPSS fWCLE/! PROJECT ::0. 2 REPORTABLE DEFICIENCY Af;D CCRRECTIVE 1CTICt!

PLAi;T ELECTF ' CAL SEPARATIO::

WASH 1;iGTON PU3LIC POWER SU? PLY SYSTE" DOCKET NO. 50-397 LICEtiSE NO. CPFR-93 Description of Deficiency To date the Plant Itain Control Rocm has been reviewed and a?pec>ir.ately 150 instances have been discovered involving violations in the appli-cation of WNP-2 Electrical Separation Criteria to safety reic. .ed cabies and panel wiring. In general, the deficiencies involved incorecct label-ing, routing, ternination, or power sour:2 of safety releted cab 11.:0 within PGCC or Control Room Panels. Exarples of defi:icncies f:und cre as follows:

1. Division 3 HPCS instrumentation powered frcm a Division 1 source;

2. Division 3 HPCS cables routed in Divisicn i P CC ducts and Division I cable trays in the cable spreadng rc r.

Safety Imolication_

The deficiencies found to date could have resulted, under tingle f:ilare conditions, in the simultaneous loss of redundant safety rcla:ad cq.;ip-ment with possible subsequent loss of safety func:icn.

Corrective Action A task force is currently reviewing the !'.cin Control Rorm and p'.cn; areas for other violations of WNP-2 Separation Criteria in al' sa'ety reia ed applications.

The WNP-2 Separation Criteria has been refined and ;iarifico and is t2ing used by the Separation Task Force as criteria by which to judga picn:

separation as designed and installed. This same criteria wil. t2 chmi -

ted in an FSAR anendment. All instances of deficiencies identifiec as criteria violations will be evaluated and correct?d via Praic:t En:ir.2 erin; L

Directives (PED's) to the appropriate c:ntractor.

The task force is working to an action plan which to date he.s re:ui:2d ir the completion of the flain Control Roor review and iden:ifica .icn of ce-ficiencies as described aboyc. The remainder of the ravicw v. hic? - '.:ludas such things as MCC's, Local Par,els, etc., is schedule . to be c:rpic:e ': y October of 1979. tote that ongoing reviews will be c:ndac:cd 3: w.rrantco by construction completion.

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y _a - a 4..J.1 Eh 105URE 2 SEPARATIGi FIELD AUDIT I i

l You are requested to perform a cetailed field at.dit of insu'.~.a:. electric I.

, equipment and systems to deter"..ine conformance to the criteria raiating to tr.c separation of, electric equipment and systems to which you have co=itted in j i .

your FSAR, (e.g., Regulation Guide 1.75).

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This audit should include a sample not less than 102, of tne installed equipmar.e l and cables, and should emphasize, but not necessarily be lit.itec to:

a) Separation of redundant Class 1E equipment (e.g., motors, valve operctors, ins truments) .

b) Separation of redundant Class lE cables.

,c) Separation of associated circuits, l d) Identification (marking) of redundant Class lE equipment and caoles.

e) Identification (marking) of associated circuits to a level incicative of i

the Class lE system with which they are associated. 1 f) Separation of redundant wiring, indicators ar.d controls at panels ar.d control boards.

l The audit should be performed by engineering and supporting technical personnel '

who understand the criteria, standards and guides relating to tne separation of electric equipment and systems, and who were not ir.volved in tne design and  ;

installation of the equipment and systems under audit.

The results of this audit should be reported to NP.C, with a ciscussion of any corrective actions taken and any additional audit :o te c;r.ct.ctad in the ever.:

numerous violations are uncovered.

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