ML20028C999

Final Significant Const Deficiency Rept 50 Re Possible Malfunction in Agastat E7000 Series Time Delay Relay. Initially Reported on 821130.All Defective Agastat E7000 Series Relays Replaced by 821124

ML20028C999
Person / Time
Site:	Waterford
Issue date:	01/04/1983
From:	Maurin L, Maurin L LOUISIANA POWER & LIGHT CO.
To:	Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CFR-050.55E, 10CFR-50.55E, W3182-0159, W3182-159, NUDOCS 8301140387
Download: ML20028C999 (3)

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Louisiana P O W E R & L I G H T! p,4, nomAeoNoe any ne na .,1NEW1,o LEANS. LOUISIANA 70174

+ (504) 366-2345 hh ir }

L. V. MAURIN Vice President i

'L January 4, 1983 goc,,,, op,7,, ion, h JAN l 01983 W l\ W3I82-0159 lj b i Q-3-A35.07.50 l

Mr. John T. Collins, Regional Administrator, Region IV 7' U. S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 /p?7 Arlington, Texas 76012 ,

SUBJECT:

Waterford SES Unit No. 3 h Docket No. 50-382 Significant Construction Deficiency No. 50 "Possible Malfunction in Agastat E7000 Series Time-Delay Relay" p.

Final Report

REFERENCE:

LP&L letter W3182-0119 dated November 30, 1982

Dear Mr. Collins:

In accordance with the requirements of 10CFR50.55(e), we are hereby providing two copies of the Final Report of Significant Construction Deficiency No. 50, "Possible Malfunction in Agastat E7000 Series Time-Delay Relay."

If you have any questions, please advise.

Ver truly yours, 'h h4uus L. V. Maurin

LVM/ MAL

keh Attachment cc: 1) Director 3) E. Blake Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 (with 15 copies of report)

2) Director 4) W. Stevenson l Office of Management

! Information and Program Control U. S. Nuclear Regulatory Commission Washington, D. C. 20555 8301140387 830104 l (with I copy of report) PDR ADOCK 05000302 S PDR

- - +.

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. FINAL REPORT OF j SIGNIFICANT CONSTRUCTION DEFICIENCY'No. 50 "POSSIBLE MALFUNCTION IN AGASTAT E7000 SERIES TIME-DELAY RELAY" INTRODUCTION-This report -is submitted pursuant ' to 10CFR50.55(e) . - It' describes a deficiency in the E7000 series Agastat relays which might have resulted in a shorter time .(

delay than that set on the relay dial. The problem is considered reportable under the requirements of 10CFR50.55(e) .

This problem was identified to the'NRC by the Control Product Division of Amerace Corporation under 10CFR21.

DESCRIPTION Extended performance Quality Assurance tests by Amerace determined that some pneumatic timing diaphrages exhibited a time and temperature based bleed-out of a fluid substance. This substance might have affected the diaphragm seal on relays operated at high temperatures for extended periods, resulting in shorter time delay than that set on the relay dial. Failure of any relays to function as designed would affect operation of motor operated valves in their assigned system. The relays in question are:

62/587 62-2/841 62/845 .2/1526 62A/1510 62/582 62/846 62-1/840 62/846' 2-1/1510 2/1032 62/583 62-2/840 62-1/841 2/1510 2-1/1526' 2/1036 62/586 SAFETY IMPLICATIONS The subject relays were installed in Class 1E control circuits and their malfunction would have adversely affected operation of safety related

' squipment if left uncorrected. The deficiency was therefore considered reportable.

-CORRECTIVE ACTION Nonconformance Report W3-3559 was written to identify two relays whice were suspected as having a defect. This was superceded by'Nonconformance Report W3-3561, which encompassed corrective action on all eighteen relays. Corrective action was as follows:

1. To provide the most efficient resolution, replacement relays for all Agastat E7000 series relays suspected as being defective were ordered on Purchase Order WP3-9363.

2. The new relays were received and accepted on September 8, 1982 via MRR-210184.

3. The existing relays were removed and returned to the vendor for re-certification and subsequent return to the site as spares, reference RMR EE372.

4. The replacement relays were installed and final acceptance was docu-mented on November 24, 1982.

,_ 4 SCD 50-Page'2 dorrectiveactionwascompletedonNovember 24, 1982; Nonconformance Reports W3-3559 and W3-3561 have been reviewed, accepted and closed as of December 17, 1982. .

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This report is submitted as the Final Report. ,

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