ML20101G513
| ML20101G513 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 12/14/1984 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Kirsch D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| ANPP-31465-TDS, DER-84-98, NUDOCS 8412270532 | |
| Download: ML20101G513 (4) | |
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Arizona Nuclear Power Project W L:C I7 R! 8 g
P.O. BOX 52034 e PHOENIX, ARIZONA 85072-2034
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December 14, 1984 ANPP-31465-TDS/TRB U. S. Nuclear Regulatory Commission Region V 1450 Maria Iane - Suite 210 Walnut Creek, California 94596-5368
'ttention: Mr. D. F. Kirsch, Acting Director Division of Reactor Projects and Safety
Subject:
Final Report - DER 84-98 A 50.55(e) Reportable Condition Relating To HFA Relay Contact Settings.
File: 84-019-026; D.4.33.2
Reference:
A) Telephone conversation between P. Narbut and L. Spiers on December 4, 1984
Dear Sir:
Attached is our final written report of the Reportable Deficiency under 10CFR50.55(e) referenced above.
Very truly yoiars, W
%W E. E. Van Brunt, Jr.
APS Vice President Nuclear Production ANPP Project Director EEVB/TRB/nj Attachment cc: See Page Two ly +, ~
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8412270532 841214 i
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Mr. D. F. Kirsch DER 84-103
-Page Two 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 B. S. Kaplan J. R. Bynum J. M. Allen A. C. Gehr W. J. Stubblefield W. G. Bingham R. L. Patterson R. W. Welcher H. D. Foster D. R. Hawkinson R. P. Zimmerman L. Clyde M. Matt
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T. J. Bloom D. N. Stover J. D. Houchen J. E. Kirby D. Canady Records Center Instituie of Nuclear Power Operations '
1100 Circle 75 Parkway, Suite 1500 Atlanta, CA -30339 J
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'T i-I FINAL REPORT - DER 84-98
- DEFICIENCY EVALUATION.50.55(e).
ARIZONA PUBLIC SERVICE COMPANY.(APS)
PVNGS UNITS 1, 2, 3 I.
Description of Deficiency Investigation-Request IR-12 was issued to investigate. General.
Electric _(GE) HFA relay's normally closed contact settings at PVNGS.
This-IR was created in response to NRC IE Notice No. 83-19.. The investigation found improper contact settings on several normally-closed HFA relays. These relays were located in Unit 1, Class IE-4.16 KV switchgear and Class 1E 125V DC control centers.
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Evaluation-i
.Contact gaps are either preset by GE at the-factory or adjusted by construction when a Design Change Package (DCP) requires changing contacts from normally open to normally closed.. On implementation of DCPs, construction follows the procedure for contact gap changes and e
adjustments.in GE instruction booklets (GEH 2024 for type HFA 51 and GRK 45484 for type HFA 151), therefore, the root cause of contact misadjustment is determined, as incorrect. settings mode in the supplier's factory, as reported in IE Notice No. 83-19.
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This improper contact adjustment could cause chattering during a seismic event which may cause malfunction of'other safety-related'
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equipment. The evaluation of this DER is being done on a: generic-basis since it is likely that different relay contacts will require adjustment in each unit.,
t II.
Analysis of Safety Implications 4-
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Based on the above, this condition is evaluated as reportable unier the requirements of 10CFR50.55(e); since, if this condition were to remain uncorrected, it would represent a significant safety
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condition. This condition is also evaluated as reportable under
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10CFR Part 2, which was reported by GE on July 26. 1982 and also-identified by the NRC with IE Information Notice No. 83-19 on-April 5, 1983.
III.
Corrective Action The relay contacts will be readjusted in accordance with GE.
instruction bookletas (GEH 2024 for type HFA 51 and.GEK 45484 for type HFA 151), which are found in 4.16kV switchgear (Iog E009-354) -
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and 125V DC Control Center's (Log E021-218 and E021-238) instruction:
manuals..
a.
In Unit 1-Startup Work Authorizations (SWAs) 17763, 17869, 17870,
-17912, 17913, 17961, 17970, 17971, 18049, 18050, 18051, 18063,
-18064, 18227,'18367, 18739,.and 19149 were issued in response to
.IR-12.'
These SWAs required the HFA relay's normally closed r
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' Final Report
. DER 84-98 Page Two contact settings of Class 1E 4.16kV switchgear and Class '1E 125V DC control centers to be inspected and adjusted as. applicable.
All Unit 1 Class 1E HFA relays have been readjusted-as required.
.b.
Units 2 and 3 HFA relay contact settings will'be inspected and' adjusted if required per IR-012 in the same manner as completed for Unit 1.
These tasks will be completed for Class 1E HFA relays prior to operating license in each unit.
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