ML20087H063
| ML20087H063 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 03/09/1984 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Bishop T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| ANPP-29030-BSK, DER-84-06, DER-84-6, NUDOCS 8403200226 | |
| Download: ML20087H063 (3) | |
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Arizona Public Service Company P.O. BOX 21666. PHOENIX ARIZONA 85036 March 9, 1984 Q
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U. S. Nuclear Regulatory Commission j
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,DJ Creekside Oaks Office Park 1450 Maria Lane - Suite 210 c3 Walnut Creek, CA 94596-5368
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Attention: Mr. T. W. Bishop, Director Division of Resident Reactor Projects and Engineering Programs
Subject:
Interim Report - DER 84-06 A 50.55(e) Potentially Reportable Deficiency Relating to Possible Deficiencias In Absolute And Leviation Alarm Modules
' Supplied 3y Foxboro File: 84-019-026; 3.4.33.2
Reference:
Telephone Conversation between P. Narout and T. Bradish on February 16, 1984
Dear Sir:
The NRC was notified of a potentially reportabl-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 vill be
' finalized by June 12, 1984, at which time a complete -report will be oubmitted.
Very truly yours, E9.
au nZ E. E. Van Brunt, Jr.-
APS Vice President, Nuclear ANPP Project Director EEVB/TRB:ria At tachment ec: See Page Two
'8403200226 840309 PDR ADOCK 05000528-8 -
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s' Mr. T. W. Bishop DER 84-06 Page Two cc:
Richard DeYoung, Director Of fice of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 T. G. Woods, Jr.
W. E. Ide D. B. Fasnacht A. C.' Rogers B. S. Kaplan L. A. Souza J. Vorees J. R. Bynum P. P. Klute A. C. Gehr W. J. Stubblefield W. G. Bingham R. L. Pa tterson
- R. W. Welcher
- H. D. Foster D. R. Hawkinson L. E. Vorderbrueggen G. A. Fiore11i S.
R.. Frost J. Se lf.
D. Canady Records Center Institute of Nuclear Power Operations 1100 circle 75 Parkway,. Suite.1500 Atlanta, GA 30339
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- INTERIM REPORT - DER 84-06 POTENTIAL REPORTABLE DEFICIENCY 1
ARIZ0hA PUBLIC SERVICE COMPANY (APS)
PVNGS' UNIT ~1, 2, & 3 I.;
Potential Problem
^
The Foxboro Company identified a possible deficiency. in Absolute and Deviation Alarm Modules -(Models 2AP & ALM-AR, '-AS, -BR, '--BS) supplied:under-C-E Purchase order.9603108 to AN?P Unit 2.
Factory testing has.shown that the 1K ohmisetpoint> potentiometers'on the subject cards may have been' mechanically stre'ssed.during assembly, a condition which'could possibly'cause the setpoint potentiometer (s) to open or~short circuit.. A failure in either. mode.could lead to-improper alarm or control actuations,.or even'a loss of alarm or' control. functionsfof various safety-related systems.
C-E has requested all ' alarm modules which bear the?date : codes '8048' througls 8152-be -inspecteu for the potential defect.
II.
Ayproach To and'Ststus of Proposed' Resolution.
' Bechtel' Engineering.has issued l investigation request No. IR-016xfor.
' Units 1, 2.and 3,'to determine if,any' defective potentiometers. exist ~
Jin C-E ' supplied Foxboro process protjective.and control: system cabinets..
-III. Projected Completion of Correceive Action-and Submittal: of the Finale
~
Report-Evaluation of this ~ ccadition and submittal of the-Final Report';is' 7
forecast to be completed by June:12',' 1984'.
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