ML20062M306

Final Significant Const Deficiency Rept 46 Re Cooper-Bessemer Emergency Diesel Generator Agastat Relays Defect.Initially Reported on 820611.Control Relays, 148GPDC-740,removed & Returned to Amarace Corp for Repair

ML20062M306
Person / Time
Site:	Waterford
Issue date:	08/11/1982
From:	Mclendon G ARKANSAS POWER & LIGHT CO., LOUISIANA POWER & LIGHT CO.
To:	Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CFR-050.55E, 10CFR-50.55E, W3K-82-0507, W3K-82-507, W3R-82-5075E, NUDOCS 8208200060
Download: ML20062M306 (3)

Text

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LOUISIANA 142 ORARONDE SmEET POWER & LIGHT P O BOX 6008

• NEW ORLEANS LOUISIANA 70174 * (504) 366-2345

=t ?= August 11, 1982 G. D. WLENDON Senior Vice President W3K-82-0507 Q-3-A35.07.46 Mr. John T. Collins, Regional Administrator, Region IV U. S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76012

SUBJECT:

Waterford SES Unit No. 3 Docket No. 50-382 Final Report of Significant Conetruction Deficiency No. 46

" Cooper-Bessemer Emergency Diesel Generators Agastat Relay Defect"

Reference:

Telecon - R. G. Bennett (LP&L) to L. Martin (NRC) on June 11, 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. 46,

" Cooper-Bessemer Emergency Diesel Generators Agastat Relay Defect."

If you have any questions, please advise.

Very truly yours, GDMcL/LLB/grf x d. ht'$ A ~

Attachment cc: 1) Director 7 .

Office of Inspection & Enforcement i

) $ $ $ljD h_fle U. S. Nuclear Regulatory Commission Washington, D. C. 20555 (with 15 copies of report)

2) Director Office of Management

'M i 3 1982 Information and Program Control U. S. Nuclear Regulatory Commission Washington, D. C. 20555 (with 1 copy of report) 8208200060 820811 PDR ADOCK 05000382 S PDR

r LOUISIANA POWER & LIGHT COMPANY WATERFORD SES UNIT NO. 3 Final Report of Significant Construction Deficiency No. 46 Cooper-Bessemer Emergency Diesel Generators Agastat Relay Defect Reviewed by / #

• R. J. Milhiset ~SLte' Manager Date Reviewed by a b J. 4. Wills - Project Superintendent '

Date Revieued by 6

e d(// f /AA/ h/l~ h E.

g liart - Project /icetising Engineer Date Reviewed by \ l 8 /d (A W. Yaeger - SrY Residhnt Engineer ' Ddte l Reviewed by MM [8MS J/Gutierr'ez - Q. A. e Supervisor Date i

i August 9, 1982 i

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r FINAL REPORT OF

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SIGNIFICANT CONSTRUCTION DEFICIENCY NO. 46 COOPER-BESSEMER EMERGENCY DIESEL GENERATORS AGASTAT RELAY DEFECT INTRODUCTION This report is submitted pursuant to 10CFR50.55(e). It describes a defect with the Agastat GPDC-740 control relays. The problem includes alarm failures and inability to effect emergency start. This problem is considered reportable under the requirements of 10CFR50.55(e). To the best of our knowledge, this problem has not been identified to the Nuclear Regulatory Commission pursuant to 10CFR21.

DESCRIPTION The Susquehanna licensee reported that preoperational testing of the diesels had identified problems with Agastat GPDC-740 control relays. Use of these relays was prescribed by the diesel manufacturer, Cooper-Bessemer. The problem included alarm failures and inability to effect emergeng start. Follow up on testing at Susquehanna of 156 relays found 82 failures.

The relay manufacturer indicates that the problem, post-mold plastic shrinkage, is applicable to all Agastat GP series relays manufactured before August 1977 (when the mold was changed).

SAFETY IMPLICATIONS It has been determined that the subject relay malfunction could result in a failure to effect the Diesel Generator start, if left uncorrected.

f The unavailability of one or both emergency power sources upon demand would be in conflict with GDC17 of 10CFR50 Appendix A.

CORRECTIVE ACTION 148 GFDC-740 control relays were removed and returned to Amarace Corporation for repair / replacement. In order to have minimal impact on startup testing, the de-fective relays associated with Diesel Generator A were returned first (74). -After repair, they were reinstalled and Diesel Generator B telays were returned for repair / replacement and subsequent reinstallation (74). Site Nonconformance Report W3-3534 was initiated to track this problem, and has been reviewed and closed, along with all Documentation subject to SCD 46. Therefore, we are submitting this report as our Final Report tc the USNRC.

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LOUISIANA POWER & LIGHT COMPANY WATERFORD SES UNIT NO. 3 i

Final Report of Significant Construction Deficiency No. 46 Cooper-Bessecer Emergency Diesel Generators Agastat Relay Defect Reviewed by /o A*

R. J. Milhiset ~SLte Manager Date Reviewed by b J. 4. Wills - Project Superintendent '

Date Revicued by % ) @ f /AA/ f"/l~ hE-

% hart i- Projec icensing Engineer Date Reviewel by , ,

[ /d (A W. Yaeger - fry Re~sidlitnt Engineer

' Ddte l

Reviewed by . ,tb o ~~[8MS J/Gutierr'ez - Q. A. e Supervisor Date August 9, 1982 n s_ _

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FINAL REPORT OF SIGNIFICANT CONSTRUCTION DEFICIENCY NO. 46 COOPER-BESSEMER EMERGENCY DIESEL GENERATORS AGASTAT RELAY DEFECT INTRODUCTION This report is submitted pursuant to 10CFR50,55(c). It describes a defect with the Agastat GPDC-740 control relays. The problem includes alarm failures and inability to effect emergency start. This problem is considered reportable under the requirements of 10CFR50.55(e). To the best of our knowledge, this problem has not been identified to the Nuclear Regulatory Commission pursuant to 10CFR21. l DESCRIPTION The Susquehanna licensee reported that preoperational testing of the diesels had identified problems with Agastat GPDC-740 control relays. Use of these relays was prescribed by the diesel manufacturer, Cooper-Bessemer. The problem included alarn failures and inahility to effect emergency start. Follow up on testing at Sasquehanna of 156 relays found 82 failures.

The relay manufacturer indicates that the problem, post-mold plastic shrinkage, is applicable to all Agastat GP series relays manufactured before August 1977 (when the mold was changed).

SAFETY IMPLICATIONS It has been determined that the subject relay malfunction could result in a failure to effect the Diesel Generator start, if left uncorrected.

The unavailability of one or both emergency power sources upon demand would be in conflict with GDC17 of 10CFR50 Appendix A.

CORRECTIVE ACTION 148 GFDC-740 control relays were removed and returned to Amarace Corporation for repair / replacement. In order to have minimal impact on startup testing, the de-fective relays associated with Diesel Generator A were returned first (74). After repair, they were reinstalled and Diesel Generator B relays were returned for repair / replacement and subsequent reinstallation (74). Site Nonconformance Report

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W3-3534 was initiated to treck this problem, and has been reviewed and closed, along with all Documentation subject to SCD 46. Therefore, we are submitting this report as our Final Report to the USNRC.

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