ML20071C826
| ML20071C826 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 02/23/1983 |
| 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-23068-GHD, DER-82-55, NUDOCS 8303080146 | |
| Download: ML20071C826 (3) | |
Text
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Docket Nos. 50-528/529/530 50.56(h)Reid[.@
Arizona Public Service Company
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P.O Box 21666. PHOENIX, ARIZONA 85036
.e February 23, 19 8,3,,_..
ANPP-23068-GHD/BSK-U. S. Nuclear Regulatory Commission Region V Creekside Oaks Office Park 1450 Maria Lane - Suite 210 Walnut Creek, California 94596-5368 Attention: Mr. D. M. Sternberg, Chief Reactor Projects Branch 1 Subj.ct:
Final Report - DER 82-55 A 50.55(e) Reportable Condition Relating to D.C. Motor Feeder Cables Sizing May Not Provide Sufficient Operating Voltage at Full Load
Reference:
(A) Telephone Conversation between J. Eckhardt and G. Duckworth on September 30, 1982 (B) ANPP-22136 dated October 28, 1982 (Interim Report)
(C) ANPP-22611 dated December 28, 1982 (Time Extension)
Dear Sir:
Attached is our final written report of the Reportable Deficiency,under 10CFR50.55(e), referenced above.
Very truly your,
CLLL M
E. E. Van Brunt, Jr.
APS Vice President Nuclear Projects Management ANPP Project Director EEVBJr/GHD:db cc: See Attached Page 2 8,,,30300014683g23pg 0cn Os 1
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i U. S. Nuclear Regulatory Commission February 23, 1983 Attention:
Mr. D. M. Sternberg, Chief ANPP-23068-GHD/BSK Page 2 cc: Richard DeYoung, Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 T. G. Woods, Jr.
J. A. Roedel D. B. Fasnacht G. C. Andognini J. R. Bynum 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. Hawkinson L. E. Vorderbrueggen G. A. Florelli P. P. Klute l
F1NAL REPORT - DER 82-55 DEFICIENCY EVALUATION 50.55(e)
ARIZONA PUBLIC SERVICE COMPANY (APS)
PVNGS UNITS 1, 2 & 3 I.
DESCRIPTION OF DEFICIENCY Bechtel Problem Alert E82-02 requested that each project review the adequacy of DC cable sizing. The Problem Alert requires that DC circuits be verified as adequate asing the following criteria:
Using the minimum bus voltage available, calculate cable sizes 1considering full load current and the resulting voltage drop in cables using the actual lengths between load and bus.. Verify that selected cables are capable of withstanding the available short circuit current.
The subsequent engineering review of PVNGS DC motor feeder cables indicated that some cables were not adequately sized to provide the minimum rated motor operating voltage at the motor terminal. This condition is attributed to sizing the cable during design and then not confirming the design when final cable lengths and loads were known.
II.
ANALYSIS OF SAFETY IMPLICATIONS This condition is evaluated as reportable under the requirements of.
10CFR50.55(e). This condition is considered to be a significant deficiency in final design released for construction.- If left uncorrected, the condition could possibly preclude safety related motors from performing per design requirements, thus not conforming to the design basis criteria stated in the FSAR.
III. CORRECTIVE ACTION 1.
All DC power and control feeder cables have been reviewed for correct sizing using final design cable lengths and loads.
Calculation 13-EC-PK-130 Rev. O is currently being completed to document this analysis and will be issued by 2/23/83.
2.
Design Change Packages 1CE-PK-021, 2CE-PK-021, and 3CE-PK-021 have been issued for Units 1, 2 and 3, respectively, to have Construction replace the under-sized cable.
3.
All the design office personnel are being made aware of this condition. To preclude recurrence of this problem, a project cable sizing procedure to insure compliance with PVNGS criteria is being issued to establish definitive guidelines for sizing cables. The cable sizing procedure will be issued
.by 3/31/83.
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