ML20080J530

Interim Deficiency Rept DER 82-47 Re Power Supplies Damaging Instrument Conductor Penetrations.Initially Reported on 830726.Util Corresponding W/Bechtel to Determine Reportability.Next Rept Will Be Submitted by 831026

ML20080J530
Person / Time
Site:	Palo Verde
Issue date:	08/30/1983
From:	Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Sternberg D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
10CFR-050.55E, 10CFR-50.55E, ANPP-27685-BSK, DER-83-47, NUDOCS 8309260381
Download: ML20080J530 (3)

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Arizona Public Service Company PO. BOX 21666 + PHOENIX, ARIZONA 85036 E3 SEP 12 N 2: g q REG!0:4 V!

August 30, 1983 ANPP-27685-BSK/RQT U. S. Nuclear Regulatory Commission Region V Creekside Oaks Office Park-1450 Maria Lane - Suite 210 Walnut Creek, CA 94596-5368 Attention: Mr. D. M. Sternberg, Chief Reactor Projects Branch 1

Subject:

Interim Report - DER 83-47 A 50.55(e) Potentially Reportable Deficiency Relating to Power Supplies May Damage Instrument Conductor Penetrations File: 83-019-026; D.4.33.2

$7-5R$,9P-S MI SM' 62h i

Reference:

Telephone Conversation between P. Johnson and R. Tucker on July 26, 1983.

Dear Sir:

The NRC was notified of a potentially reportable deficiency in the referenced telephone conversation. At that time, it was estimated that a determination of reportability would be made within thirty (30) days.

Due to the extensive investigation and evaluation required, an Interim Report is attached.

It is now expected that this information will be finalized by October 26, 1983, at which time a complete report will be submitted.

Very truly your,

CLLL h LL E. E. Van Brunt, Jr.

APS Vice President, Nuclear Projects Management ANPP Project Director EEVB/RQT:sn Attachment ec: See Attached Page Two 8309260381 830830 PDR ADOCK 05000528 6

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.,g U.:S. Nuclear Regulatory Commission Page Two cc:

Richar'd DeYoung, Director

. 0ffice of Inspection and Enforcement I

'U. S. Nuclear Regulatory Commission Washington, D. C._20555 T. G. Woods, :Jr.

G. C. Andognini' J. A.-Roedel D. B. Fasnacht-A. C. Rogers B. S. Kaplan W. E. Ide J. Vorees J. R. Bynum D. D. Green P.

P.~ Klute' A. C. Gehr W. J. Stubblefield W. G. Bingham R. L. Patterson -

R.~W. Welcher R. M. Grant D. R. Hawkinson L. E. Vorderbrueggen G. A. Fiorelli

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Self S. R. Frost

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Records Center Institute of Nuclear Power Operations;

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1100 Circle 75 Parkway ~- Suite 1500 Atlanta, Georgia 30339 i.

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INTERIM REPORT - DER 83-47 POTENTIAL REPORTABLE DEFICIENCY.

ARIZONA PUBLIC SERVICE COMPANY (APS)

PVNGS. UNIT 1, 2 & 3 I.

LPotential'. Problem A study was conducted to identify all power, control, and. instrument' penetrations where the power supply has sufficient energy to damage the penetration ~ conductors.- The results indicated that for power

' circuits sufficient primary and backup breakers and/or fuses are provided. Instrument circuits with a high voltage power supply.

(approx. 2000 volts) were evaluated as the most'likely instrument

- circuits - to require backup' fuses. The evaluation indicated that sufficient energy was not available to damage penetration conductors, so all instrument circuits were eliminated from the

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study.. For control penetrations 106 cases were identified where sufficient energy was available to damage the penetration conductors

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so backup fuses are required.

i II. - Appro.ach jo and. Status.Of P_roposed _ Resolution i

APS is corresponding with.Bechtel to determine reportability.

III. Proiected Completion of ' Corrective _ Action and, Submittal _of the ' Final Re, port Evaluation of.this condition'and' submittal _of the Final Report is 1

Forecast to be completed by October 26,' 1983.

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