ML20091M317
| ML20091M317 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 05/29/1984 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Bishop T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| ANPP-29612-TDS, DER-82-76, NUDOCS 8406110238 | |
| Download: ML20091M317 (4) | |
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U.'S. Nuclear Regulatory Commission Region V Creckside 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, Revision 1 - DER 82-76 A 50.55(e) Potentially Reportable Deficiency Relating to Target Rock Valves Do Not Meet Specification / Test Requirements File: 84-019-026; D.4.33,2
Reference:
A) Telephone Conversation between P. Narbut and G. Duckworth on November 24, 1982 B) ANPP-22590, dated December 23, 1982 (Interim Report)
C) ANPP-23223, dated March 10, 1983 (Time Extension)
D) ANPP-23641, dated May 3,1983 (Time Extension)
F) ANPP-27523, dated August 5, 1983 (Time Extension)
F) ANDP-28247, dated November 17, 1983 (Time Extension)
G) ANPP-28603, dated' January 12, 1984 (Time Extension)
H) OT1P-28884, dated February 15,1984 (Time Extension)
I) ANFP-29288, dated April 12, 1984 (Time Extension)
Da_ar. Sit :
The NRC was notified of a potentially reportable deficiency in Reference A, an Interim Report was transmitted by Reference B, and Time Extensions were requested by References C, D, E, F, G,- H, and I.
At that tima, it was estimated that a Final Re' port would be available by Hay 30,1984.
Due 'to' the extensive ' investigation and evaluation required, a revised Interim Report is' attached. It is now expected that this information will be finalized by July 20, 1984, at which time a complete report will be submitted.
Very truly yours, 01%
E.E.VanBrunt,J.ta'(
8406110238 840529 r?
PDR-ADOCK 05000528 APS Vice President 8
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Nuclear Production ANPP Project Director EEVB/3RB:ru -
Attachaent cc: ' ' See Page Two ;
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Mr. T.'W. Bishop DER 82-76 Page Two ec:
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. Fasuacht A. C. Rogers B. S. Kaplan L. A. Souza D. E. Fowler J. Vorees J. R. Bynum J. M. Allen P. P. Klute A.
C.' Gehr W. J. Stubblefield W. G. Bingham R. L. Patterson R. W. Welcher H. D. Foster D. R. Favkinson L. E. Yorderbrueggen
- G.-A. Fiorelli S.~R.
Frost J. Self D. Canady Records Center Institute of Nuclear Power Operations 1100 circle 75 Parkway, Suite 1500 Atlanta, GA 30339 t
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INTERIM REPORT - REVISION 1 - DER 82-76 POTENTIAL REPORTABLE DEFICIENCY ARIZONA PUBLIC SERVICE COMPANY (APS)
PVNGS UNITS 1, 2, & 3 I. Potential Problem A total of thirty (30) Target Rock solenoid valves have been supplied by Combustion Engineering (C-E) to PVNGS. Twenty-four (24) one-inch valves Model 77L-001 were assigned to be installed as Safety Injection Tank Vent valves (eight per unit) and are identified by the following unit tag numbers:
1JSIAHV605 2JSIAHV605 3JSIAHV605 1JSIAHV606 2JSIAHV606 3JSIAHV606 1JSIAHV607 2JSIAHV607 3JSIAHV607 1JSIAHV608 2JSIAHV608 3JSIAHV608 1JSIBHV613 2JSIBHV613 3JSIBHV613 1JSIBHV623 2JSIBHV623 3JSIBHV623 1JSIBHV633 2JSIBHV633 3JSIBHV633 1JSIBHV643 2JSIBHV643 3JSIBHV643 Six (6) two-inch Model 77L-003 Target Rock solenoid valves were assigned to be installed as Pressurizer Auxiliary Spray valves (two per unit) and are identified by the following unit tag numbers:
1JCHAHV205 2JCHAHV205 3JCHAilV205
]JCHAHV203 2JCHAHV203 3JCHAHV203 During this period of tima C-E determined that four (4) valves wouAd
-be returr.ed to C-E for additional testing in accordance with NUREG-0588. Unit 1 & 2 valves were installed at this time, so valves were selected from Unir 3 stock and identified by model numbere, serici numbers and size as follows:
Model No.
Serial No.
Size Unit Tag Numbers 7 7L-001 17 1"
3JSIAHV605 77L-001-18 1"'
3JSIAHV606 77L-003 5
2"
. 3JCHBHV203 77L-003 6
.2" 3JCHAHV205
. Inspection of these valves by C-E revealed deficiencies which can be identified as visual inspection items prior to testing and items.
found during the testing program as follows:
.1.
-Prior to environmental testing
- a.. Incorrect. Valve Assembly - Examination found an off-center
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insulating. washer _ wedged in the land between the pressure housing and' the lower case of the reed switch housing. This prevented pressure from'the assembly nut being transmitted
-to the bottom of the solenoid housing and' the lower 0-ring seal. The misalignment was corrected.
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' Interim Report - Rev. 1 DER 82-76 Page Two i
b.
Significant Missing Parts - The delivered valves lacked 0-ring seals on both valves [5] and (6]. In addition, rubber grommets protecting the solenoid leads from chafing by the housing were missing on valves [17] and [18]. The missing 0-rings were replaced.
2.
Attributed to environmental testing program a.
Limit switch valve position indicator failures, due to improper curing within the reed switch assembly, b.
Valve Failed to Open - About 75% through the seismic test, valve [5] failed to open due to an electrical short in the solenoid leads, which welded together at a point about 1-inch from the solenoid. On disassembly, the solenoid was observed to be free to move in all directions.
The lead wires of the other valve tested [18] were also damaged to the extent of exposing the conductors, but they had not as yet come into contact either with each other or with the housing, where the grommet was missing.
c.
Valve Failed to Close - Although valve [18] was still operating electrically at termination of the test, it was unable to seat properly in the closed position because the soft seat ting had started to come out of its retention groove in the end of the plunger.
II. Anproach To and Status of Proposed Resolution T'e Project has initiated Investigative Request 018 to determine if n
other Target Rock valves exhibit similar problems. Results of-this I/R will be documented by the Final Report for this DER.
III. Projected Completion of Corrective Action and Submittal of the Final Re port.
-Evaluation of this condition and submittal'of the Final Report is forecast to be completed by ~ July 20, 1984.
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