ML20096F335
| ML20096F335 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 08/23/1984 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Bishop T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| ANPP-30308-TDS, DER-84-48, NUDOCS 8409070395 | |
| Download: ML20096F335 (3) | |
Text
s-Q Arizona Public Service Company August 23, 1984 ANPP-30308-TDS /1RB 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:
Interim Report - DER 84-48 A 50.55(e) Potentially Reportable Defi.:iency Relating To Improper Material For Pipe Plugs On MSIV.
File: 84-019-026; D.4.33.2
Reference:
Telephone Conversation between D. Hollenbach and T. Bradish on July 24, 1984
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 September 21, 1984, at which time a complete report will be submitted.
Very truly yours, ci w
E. E. Van Brunt, Jr.
APS Vice PresidenN Nuclear Production ANPP Project Director EEVB/TRB/nj At tachment fita rlp;036 cc: See Page Two a a ;jj "n R !1ll w;,
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. b Mr. T...W. Bishop DER 84-48 Page Two1 cc:
' Richard DeYoung, Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 T. G. Woods, Jr.
D. B. Karner W. E. Ide D. B. Fasnacht A. C. Rogers L. A.'Souza D. E. Fowler T. D.-Shriver C. N. Russo J. Vorees
~J. R. Bynum.
J. M. Allen
~J. A. Brand
' A. C. Gehr W. J. Stubblefield W. G. Bingham R. L. Patterson R. W. Welcher H. D. Foster D. R. Hawkinson L. E. Vorderbrueggen R. P. Zimmerman S. R. Frost J. Self M. Woods T. J. Bloom D. Canady Records Center Institute of Nuclear Power Operations 1100 circle 75 Parkway, Suite 1500
. Atlanta, GA 30339 l
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. INTERIM REPORf'- DER 84-48 POIENTIAL REPORTABLE DEFICIENCY.-
ARIZONA PUBLIC SERVICE COMPANY-(APS) w-
'PVNGS UNIT 1, 2,'3 "I.-
Potential Problem
.NAMCO EA-18011mit switches on Main Steam Isolation Valves supplied by Anchor / Darling have ' stainless steel pipe plugs which are.used to retain.the operating-levers in place. _The
.' pipe plugs gall-during installation,-causing the operating l levers to come loose due to vibration or when the switches are actuated. -
s The Main Steam Isolation Valves (MSIVs)-are provided with six limit switches (three switches are for the active side and three switches are for the _ standby train). Function of.the switch is to indicate'the valve disc position at full close, full open, and 90% open. These switches are mounted on the
. yoke legs.
Additionally, these switches are wired per logic in such a way that their operation affects the status of the 4-way hydraulic valve which controls the MSIV open/close operation.
II.
Approach To'and Status of Proposed Resolution Bechtel. Engineering is corresponding with Anchor / Darling to determine -reportability and tec1:nical justification for corrective action.
III.
Projected Completion of Corrective Action and Submittal of the Final Report Evaluation of this condition and submittal of the Final Report is forecast to be completed by September 21, 1984.
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