ML20078Q904
| ML20078Q904 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 10/28/1983 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Bishop T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| REF-PT21-83 10CFR-050.55E, ANPP-28131-BSK, DER-83-26, NUDOCS 8311140207 | |
| Download: ML20078Q904 (4) | |
Text
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c Arizona Public Service Companyj * [hj/
P o DOX TC66
- PHOENIX AAl2ONA 85036 Nl.?: $
October 28, 198 N O'YI//tc ANPP-28131-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. T. W. Bishop, Director, Division of Resident, Reactor Projects and Engineering Programs
Subject:
Final Report - DER 83-26 A 50.55(e) Reportable Condition Relating to BOP ESFAS Electronic Modules Failed Preoperational Testing Due To Overheating.
File:
83-019-026; D.4.33.2
Reference:
A) Telephone Conversation between P. Narbut and R. Tucker on May 25, 1983 B) ANPP-23887, dated May 25, 1983 (Interim Report)
C) ANPP-27291, dated July 25, 1983 (Time Extension)
Dear Sir:
Attached is our final written report of the Reportable Deficiency under 10CFR50.55(e), referenced above.
Very truly yours, G
-(
Q m LLL E. E. Van Brunt, Jr.
APS Vice President, Nuclear Projects Management ANPP Project Director EEVB/RQT:ru Enclosure cc: See Page Two 8311140207 831028 PDR ADOCK 05000528 S
PDR l'
[E.27
.-c i?
. Mr. T. W. Bishop DER 83-26 Page 2
' ec:-
Richard Defoung, Director Office of Inspection and Enforcement U. S; Nuclear Regulatory Commission Washington, D. C. 20555 T. G. Woods, Jr.
C. C. Andognini J. A. Roedel D. B. Fasnacht A. C. Rogers B. S. Kaplan W..E. Ide J. Vorees J. R. Bynum D. D. Creen/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 C. ' A. Fiore111 S. R. Frost J. Self D. Canady Records Center
-Institute of Nuclear Power Operations 1100 circle 75 Parkway - Suite 1500 Atlanta, Georgia 30339 b
<o FINAL REPORT - DER 83-26 DEFICIENCY EVALUATION 50.55(e)
ARIZONA PUBLIC SERVICE COMPANY (APS)
PVNGS UNIT 1 I.
Description of Deficiency While performing Preoperational Testing in accordance with procedure 92-PE-ISA01 the Balance of Plant (BOP) Engineered Safety Feature Actuation System (ESFAS) modules, located in the control room cabinets failed to operate properly. The modules would operate af ter removal, cooling to room temperature and i
reinstallation.
In addition, it was reported that the Diesel Generator Start Signal (DGSS) module failed in the non-actuated state and would not respond to automatic or manual input signals even af ter cooling and reinstallation of the module. The subject modules are located in Unit I cabinets, identified as tag numbers 1-J-SAA-C02A and 1-J-SAB-C02B, and were supplied by GA Technologies Incorporated under purchase order specification 13-JM-104.
Investigation by the GA field engineer revealed that the inoperability of the heated modules was attributed to abnormal environmental temperatures (128*-148' F) recorded within the non-ventilated cabinets.
It was determined that the normal environmental temperature inside the cabinet should not exceed 104* F.
GA will provide perforated hole cabinet sections as a field modification to reduce the environmental temperatures to the acceptable 104* F range.
The GA field engineer determined that the malfunction of the DGSS module wac due to a bent pin on one of the I/C circuits of the module.
This was repaired by the GA representative via NCR S-309-1-J.
The cabinet modules were retested prior to modifications for ventilation, with cabinet doors open, to ensure functional operation of modules not related to the environmental temperature problem.
II.
Analysis of Safety Implications The BOP-ESFAS system is essential to the safe operation of the plant. Any conditions that exist which would cause non-reliable
. operation of the system are unacceptable.
This condition is evaluated as reportable under the requirements of 10CFR50.55(e), since if this condition were to remain uncorrected, it would represent a significant safety condition. In addition, this condition has been evaluated, and qualifies for reportability under the requirements of 10CFR21.
, j '*
Final Report-DER 83-26 Page Two
-III.
'C'orrective Action A.
- CA will provide field modification kits.to rectify the ventilation problems. Bechtel will implement the modifications by issuing the following DCP's:
ISJ-SA-010 2SJ-SA-010 3SJ-SA-010 B. _. ' The CA field representative will visually inspect Units 2 & 3 cabinets. to ensure no defective module I/C circuits exists.
NCR's for Units 2 & 3 will be initiated as applicable.
C.
CA will submit revised dradings and documentation as required
_for field modification.
D.
A copy of 'this report _will be sent to CA Technologies requesting.their review for reporting under 10CFR21 since this report does 'not include ~ the number and location of all components supplied.
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