ML20049J652
| ML20049J652 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 03/09/1982 |
| From: | Mclenden G LOUISIANA POWER & LIGHT CO. |
| To: | Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8203190007 | |
| Download: ML20049J652 (5) | |
Text
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LOUISIANA f 242 oEtanoNot S1nEer POWE R & L1G HT/ P O DOX 0008
- NEW OnLEANS. LOUISIANA 70174 * (504) 366 2345 t/IDDL E SOUT H UTILITIES SYSTEM March 9, 1982 G D. McLENDON Senior Vice President W3' S
Mr. John T. Collins, Regional Administrator, Region IV
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U. S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 1,
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Arlington, Texas 76012 i
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SUBJECT:
Waterford SES Unit No. 3
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N Docket No. 50-382 x
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Interim Report of Significant Construction Deficiency'No.--46 N /
" Cooper-Bessemer Emergency Diesel Generators AgastAt'ReldyhDeIect"
Reference:
Telecon - L. L. Bass (LP&L) to B. Crossman (NRC) on 2/5/82
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. 46, " Cooper-Bessemer Emergency Diesel Generators Agastat Relay Defect".
If you have any questions, please advise.
Very truly yours, 1
GDMcL/LLB/ncd
(@$[)h[h Attachment cc:
1)
Director 4
Office of Inspection & Enforcement MAR I 51982 i
Washington, D. C. 20555
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j U. S. Nuclear Regulatory Commission (with 15 copics of report) 2)
Director Office of Management Information and Program Control l
U. S. Nuclear Regulatory Commission Washington, D. C. 20555 (with I copy of report) f ks/ /
1 8203190007 820309 PDR ADOCK 05000382 S
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i LOUISINTA POWER & LIGilT COMPAllY WATERFORD SES UNIT No. 3 J
Interim Report of Significant Construction Deficiency No.146 Cooper-Bessemer Emergency Diesel Generators Agastat Relay Defect" Reviewed by g
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' Site Manager Date R. J.
b Reviewed by Date J( L'. Wills - Project Superintendent YV f
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Revicued by
.< liarf. lProject dens'ing Engin6er
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Date
.3-'/ - fd Reviewed by L, W.' Yaegbr
'dr. Resident Engineer Date
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Reviewed by y,
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. Gutfdrrez - Q. A.
te Supervisor Date 1hrch 2,1982 4
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INTERIM REPORT OF SIGNIFICANT CONSTRUCTION DEFICIENCY.NO. 46 COOPER-BESSEMER EIERGENCY DIESEL GENERATORS AGASTAT RELAY DEFECT INTRODUCTION This report is submitted pursuant to 10CFR50.55(e).
It describes a defect with the Agastat GPDC-Th0 control relays. The problem included alarm failures and -
inability to effect emergency start. This problem is considered reportable under the requirements of 10CFR50 55(e). To the best of cur knowledge, this problem has not been identified to the nuclear Regulatory Commission pursuant to 10CE?21.
DESCRIPTION Becently, 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 emergency start. Follow on testing of 156 relays found 82 failures.
t j-The relay manufacturer indicates that the problem, post-mold plastic shrinkage, i
is applicable to all Agastat GP series relays manufactured before August 1977 (when the mold was changed). Reportedly, these GP relays are a standard com-mercial item not designated for nuclear use by their manufacturer. Use in other-than diesel circuitry is possible.
r SAFETY IMPLICATIONS It has been determined that the subject relays malfunction would result in a f
failure to effect the Diesel Generator. start, if left uncorrected.
The unavailability of one or both emergency power sources upon demand would be l
in conflict with GDC17 of 10CFR50 Appendix A.
i CORRECTIVE ACTION GFDC-7L0 control relays are to be removed and returned to Amarace Corporation for l
repair / replacement.
In order to have' minimal impact on startup testing, the de-fective relays associated with Diesel Generator A are to be returned first. -After repair, they are to be reinstalled and Diesel Generator B relays returned for repair / replacement and subsequent reinstallation. At present we are anticipating a ccrrective action completion date by May 28, 1982, with a Final Report to be sub-mitted to the USURC by June 11, 1982.
Site Nonconformance Report W3-353h has been initiated to track this problem.
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LOUISIANA POWER & LIGHT COMPANY WATERFORD SES UNIT NO. 3 Interim Report of Significant Construction Deficiency No h6 Cooper-Bessemer Emergency Diesel Generators Agastat Relay Defect" 3 2- [ 2 - -
Reviewed by
/
R. J.
- Site Manager Date b
Reviewed by Date J( LI Wills - Project Superintendent Reviewed by E/f k
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~f 5
. Hare ' Projectpdens'ing Engin6er
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Date N
3'/ ~ 9d Reviewed by(,
W." Yae6 r - dr
.csident Engineer Date 3
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'[2; Reviewed by
- f. Gut.$6rr6z - Q. A.
te Supervisor Date i
March 2, 1982 i
INTERIM REPORT OF SIGNIFICANT CONSTRUCTION DEFICIENCY NO. h6-COOPER-BESSEMER EMERGENCY DIESEL GENERATORS AGACTAT RELAY DEFECT INTRODUCTION This report is submitted pursuant to 10CFR50 55(e).
It describes a defect with the Agastat GFDC-Th0 control. relays. The problem included 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 prcblem has not been identified to the Nuclear Regulatory Commission pursuant to 100FE21.
DESCRIPTION Recently, the Susquehanna licensee reported that preoperational testing of the diesels had identified problems with Agastat GPDC-740 control relays. Use o f these relays was prescribed by the diesel manufacturer, Cooper-Bessemer. The problem. included alarm failures and inability to effect emergency start. Follow on t'esting 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). Reportedly, these GP relays are a' standard com-mercial item not designated for nuclear use by their manufacturer. Use in other than diesel circuitry is possible.
SAFETY IMPLICATIONS It has been determined that the subject relays malfunction would result in a failure to effect the Diesel Generator start, if left uncorrected.
The unavailability of one or both emergency power cources upon demand would be in ecnflict with GDC17 of 10CFR50 App'endix A.
CORRECTIVE ACTION GF27 ~k0 control relays are to be removed and returned to Amarace Corporation for repair / replacement.
In order to have minimal impact on startup testing, the de-fee:1te relays associated with Diesel Generator A are to be returned first.
After repair, they are to be reinstalled and Diesel Generator B relays returned for repsir/ replacement and subsequent reinstallation. At present we are anticipating a ecrrective action completion date by May 28, 1982, with a-Final Report to be'sub-mittei to the U3HRC by June 11, 1982. Site Nonconformance Report W3-353h has been ind:isted to track this problem.
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