ML20039F239
| ML20039F239 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 12/30/1981 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Faulkenberry B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8201120255 | |
| Download: ML20039F239 (4) | |
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Docket Nos. 50-528/529/530
$0 55(e) Report
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P.O. BOX 21666 PHOENIX, A AIZoN A 85036 December 30, 1981 ANPP-19799-GHD/BSK A
U. S. Nuclear Regulatory Commission S
Fegion V A
RECEIVED.,
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Creekside Oaks Office Park E -9 m
1450 Maria Lane - Suite 210 7
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-Attention:
Mr. B. H. Faulkenberry, Chief g1Ist j%
3 Reactor Construction and 1
Engineering Support Branch N
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Subject:
Final Report - DER 81-18
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A 50.55(e) Report Relating to G.E. Motor Control Centers Containing Varglas Tie Material Which May Unravel and Loosen.
File: 81-019-026 D.4.33.2 Referance:
(A) Telephone Conversation'between J. Eckhardt and B. Kaplan on June 24, 1981 (B) ANPP-18455, dated July 21, 1981, Interim Report
Dear Sir:
Attached, is our final written report of the deficiency referenced above, which has been determined to be Not Reportable under the requirements of 10CFR50.55(e).
Very truly yours, 6.4.% @dk E. E. Van Brunt, Jr.
APS Vice President Nuclear Projects ANPP Project Director EEVBJr/GHD:bj Attachment cc:
See Page 2 8201120255 811230
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.Mr. B. H. Faulkenberry, Chief ANPP-19799-GHD/BSK December 30, 1981 Page 2' cc: Richard DeYoung, Director U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Washington, D.C.
20555 J. A. Roedel D.-B. Fasnacht G. C. Andognini F. W. Hartley J. M. Allen A. C. Rogers B. S. Kaplan-W. E. Ide J. Vorees J. A. Brand A. C. Gehr W. J. Stubblefield W. G. Bingham R. L. Patterson R. W. Welcher R. M. Grant D. R. Ilawkinson L. E. Vorderbrueggen Me, Patricia Lee Hourihan 6413 South'26th Street Phoenix, Arizona 85040
FINAL REPORT - DER 81-18 DEFICIENCY EVALUATION 50.55(e)
ARIZONA PUBLIC SERVICE COMPANY (APS)
PVNGS UNITS 1 AND 2 I.
DESCRIPTION OF DEFICIENCY During a Bechtel witnessed test of a General Electric Class IE Motor-Control Center at Mebane, N.C., a test failure was documented on 3/27/81 which was caused by a piece of "Varglas" wire tie material becoming lodged between N.O. contacts of relay FX (Points 7 & 8 on Dwg. 221B5925).
This prevented relay contacts from closing when the relay was energized.
A follow-up surveillance was completed for the related GE equipment delivered to the jobsite. This activity found that some "Varglas" wire ties were loose on wiring bundles and some were found in the bottom of the MCC panels. The following Nonconformance Reports have been issued to identify these conditions as follows:
NCR E-J-1094 lE-PRA-M31 and IE-PHB-M32 E-J-1095 2E-PHA-M31 and 2E-PHB-M32 E-A-106 2E-NHN-M20 (Non Class IE)
II.
ANALYSIS OF SAFETY IMPLICATIONS Bechtel contacted GE regarding these conditions and concurs with their evaluation that the identified failure is an isolated case and does not meet any of the reportability criteria of 10CFR50.55(e). See attached G.E. letter.
The observed condition of loose "Varglas"-
wire ties has been evaluated by Bechtel Engineering as not safety significant since the condition does not represent a significant deviation from the procurement specification. None of the observed wire ties were in a position to interfere with the functional equipment within the cabinet.
Should this condition not have been detected and corrected, it would not represent a safety significant condition.
III.
CORRECTIVE ACTION The applicable nonconformance reports will be dispositioned to remove any loose wire tie material and to tighten any excessive loose "Varglas" wire ties, and to assure that the wire tie bundles are positioned away from the DC devices which have normally open contacts.
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G EN ER AL( l) ELECTRIC soscraic uriury SALES DIVISION GENERAL ELECTRIC COMPANY,9350 E. FLAIR DR., EL MONTE, CALIFORNIA 91734 Phone: (213) 572-5200 MAILING ADDRESS: P.O. BOX 2830, TERMINAL ANNEX, LOS ANGELES, CALIF. 90051
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October 28, 1981 GCT 30*81 R
A Bechtel Power Corporation j
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t P.O. Box 60860, Terminal Annex yj sros 1.os Angeles, California 90060 m_sg Pc iii, Attention:
'W. G. Bingham W
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Reference:
Arizona Nuclear Power Project 7
Bechtel Job 10407 m m= =
480V MCC L ' '"
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Gentlemen:
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eu We have investigated the conditions described in your Deficienc; _Dal'in H e Report 81-18.
The failure described occured during factory acceptance test of a DC Motor Control Center for Bechtel's, Hope Creek nuclear project. This was a single failure due to Varglas.
The failure mode was a contact on a DC device which would not close (make contact) due to a strand of Varglas being in between the moving and stationary contacts. The failure was due to an operator error. The ends of a Varglas tie had been lef t unusually long and were inadvertently pushed into the DC device area during inspection and subsequent handling.
Our corrective action was to shorten this tie and reposition the wire bundle away from the DC device. This was the only failure noted during reinspection.
This was a maveric'< failure due solely to human error in workmanship, and does l
not represent our product quality or acceptability of Varglas ties.
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As reported, the equipment supplied to PVNGS has Varglas. All Varglas ties have a tendancy to unravel to the knot, but this does not cause the knot to loosen if the knot was properly tied at the factory. Each MCC may have several hundred Varglas ties. The failure of one tie should not result in l
the wire bundles falling down, or the failure of any IE devices.
As stated above, the reported failure was a maverick failure and could be prevented l
by positioning thewire bundles away from DC devices which have normally open l
contacts.
1 Ver truly ur
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l L. R. Fickel l
Ssles Engineer LRF:1b y
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