ML20052B358
| ML20052B358 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 04/12/1982 |
| From: | Debruin J, Gutierrez J, Hart J, Mclendon G, Milhiser R, Wills J LOUISIANA POWER & LIGHT CO. |
| To: | Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| REF-PT21-82 10CFR-050.55E, 10CFR-50.55E, Q-3-A35.07.50, W3K-82-0219, W3K-82-219, NUDOCS 8204300334 | |
| Download: ML20052B358 (5) | |
Text
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/ 142 OELARONDE STnEET l
POWER & LeGHT/ P O BOX 6008
- NEW ORLEANS. LOUISIANA 70174 * (504) 366-2345 Er $ss3NO April 12, 1982 G D. McLENDON D
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W3K-82-0219 I ', j N_
s Q-3-A35.07.5 NY c3 Mr. John T.
Collins, Regional Administrator, Region IV C/
U. S. Nuclear Regulatory Commission
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SUBJECT:
Waterford SES Unit No. 3 b; ^
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Docket No. 50-382 b
Interim Report of Significant Construction Deficiency No.
7 "Possible Malfunction in Agastat E-7000 Series Time-Delay Rel
Reference:
LP&L Letter to USNRC W3K-82-0156 dated March 18, 1982
Dear Mr. Collins:
In accordance with the requirements of 10CFR50.55(e), we are hereby providing two copies of the Interim Report of Significant Construction Deficiency No. 50, "Possible Malfunction in Agastat E-7000 Series Time-Delay Relays."
If you have any questions, please advise.
Very truly yours, GDMcL/LLB/grf Attachment cc:
- 1) Director Of fice of Inspection & Enforcement U. S. Nuclear Regulatory Commission g
Washington, D. C. 20555 (with 15 copies of report)
- 2) Director office of Management
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Information and Program Control U. S. Nuclear Regulatory Commission Washington, D. C. 20555 (with 1 copy of report)
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LOUISIANA POWER & LIGIIT COMPANY WATERFORD SES UNIT NO. 3 INTERIM REPORT OF SIGNIFICANT CONSTRUCTION DEFICIENCY NO. 50 "POSSIBLE MALFUNCTION IN AGASTAT E7000 SERIES TIME-DELAY RELAY"
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Reviewed by:
/W Date R. J iiser - Site Manager Reviewed by:
ct Superintendent
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ills - Pro.
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J. DeBruin - ESSE Project Engineer
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f Date J Gutierrez - Q. A. flite Supervisor 7
April 8, 1982 l
INTERIM REPORT OF SIGNIFICANT CONSTRUCTION DEFICIENCY NO. 50 "POSSIBLE MALFUNCTION IN AGASTAT E7000 SERIES TIME-DELAY RELAY" INTRODUCTION This report is submitted pursuant to 10CFR50.55(c).
It describes a deficiency in the E7000 series Agastat relays which results in a shorter time delay than those set on the relay dials. This problem is still presently under evaluation per the requirements of 10CFR50.55(c). This problem has been identified to the NRC by Control Product Division, Amerace Corporation under 10CFR21.
DESCRIPTION Extended-performance Quality Assurance tests have determined that pneumatic timing diaphragms manufactured by one of two diaphragm suppliers exhibit a time and temperature based bleed-out of a fluid substance. This substance may affect the diaphragm seal on relays operated at high temperatures for extended periods, resulting in shorter time-delays than those set on the relay dial.
SAFETY IMPLICATIONS The extent of potential impact on safety-related systems is under review at this time.
CORRECTIVE ACTION Ebasco Design Engineering is presently conducting an extensive investigation to determine numbers and locations of.E7000 series Agastat I
time-delay relays that may be installed at Waterford SES Unit No. 3.
Upon completion of the investigation and evaluation of the results, a more detailed Interim Status Report will be submitted.
It is estimated that a Final Report will be submitted to the USNRC by July 15, 1982.
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i LOUISIANA POWER & LIGHT COMPANY l
WATERFORD SES UNIT NO. 3 INTERIM REPORT OF SIGNIFICANT CONSTRUCTION DEFICIENCY NO. 50 "POSSIBLE MALFUNCTION IN AGASTAT E7000 SERIES TIME-DELAY RELAY" Reviewed by:
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Date R. J iiser - Site Manager Reviewed by:
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ills - Pro ct Superintendent
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Reviewed by:
J. DeBruin - ESSE Project Engineer
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Reviewed by:
Date J/Gutierrez-Q.A.fliteSupervisor April 8, 1982
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INTERIM REPORT OF SIGNIFICANT CONSTRUCTION DEFICIENCY No. 50 "POSSIBLE MALFUNCTION IN AGASTAT E7000 SERIES TIME-DELAY RELAY" INTRODUCTION This report is submitted pursuant to 10CFR50.55(c).
It describes a deficiency in the E7000 series Agastat relays which results in a shorter time delay than those set on the relay dials. This problem is still presently under evaluation per the requirements of 10CFR50.55(c). This problem has been identified to the NRC by Control Product Division, Amerace Corporation under 10CFR21.
DESCRIPTION Extended-performance Quality Assurance tests have determined that pneumatic timing diaphragms manufactured by one of two diaphragm suppliers exhibit a time and temperature based biced-out of a fluid substance. This substance may affect the diaphragm seal on relays operated at high temperatures for extended periods, resulting in shorter time delays than those set on the relay dial.
SAFETY IMPLICATIONS The extent of potential impact on safety-related systems is under review at this time.
CORRECTIVE ACTION Ebasco Design Engineering is presently conducting an extensive investigation to determine numbers and locations of E7000 series Agastat time-delay relays that may be installed at Waterford SES Unit No. 3.
Upon conpletion of the investigation and evaluation of the results, a more detailed Interim Status Report will be submitted.
It is estimated that a Final Report will be submitted to the USNRC by July 15, 1982.
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