ML19351F747
| ML19351F747 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 01/15/1981 |
| From: | Robert Carlson NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Kemper J PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| References | |
| NUDOCS 8102200038 | |
| Download: ML19351F747 (1) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMMISSION y
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REGION 1 O
631 PARK AVENUE s
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,o KING OF PRUSSIA, PENNSYLVANIA 19406 1 5 J q ISSI Docket No. 50-352 50-353
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ATTN: Mr. John S. Kemper tLU Vice President Engineering and Research g]
FEB o 2 798I" 13 2301 Market Street Philadelphia, PA 19101
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p Gentlemen:
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Subject:
Colt Diesel Generator - Possible Field Insulation Damage Thank you for your letter, dated November 6, 1980, which forwarded a final report pursuant to 10 CFR 50.55(e) regarding the subject matter.
This matter will be reviewed during a subsequent inspection.
Your cooperation with us is appreciated.
Sincerely, s
Robert T. Carlson, Chief Reactor Construction and Engineering Support Branch cc:
V. S. Boyer, Senior Vice President, Nuclear Power f
8102 200 ogg
PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET P.O. BOX 8699 PHILADELPHIA. PA.19101 12151 e41-4502 vmsnasiosur c........
NOV -g yggg Mr. Boyce Grier, Director Office of Inspection and Enforcenent Region I United States Nucler Regulatory Commission 631 Park Avenue King of Prussia, PA 19406
SUBJECT:
Significant Deficiency Report No. 17 Colt Industries Emergency Diesel Generator -
Possible Field Insulation Damage Limerick Genarating Station, Units 1 and 2 NRC Construction Permits No. CPPR-106, 107 ATTACHMENT:
Letter Colt Industrias to USNRC Region III, September 22, 1980 FILE:
QUAL 2-10-2 (SLR #17)
Dear Mr. Brier:
The attachment has brought to our attention a possible deficiency in the field insulation of the subject Colt Industries emergency diesel generators which has been'previously reported to the USNRC under the provisions of 10CFR, Part 21.
The subject diesel generators are being supplied by Colt Industries for use at Limerick Generating Station.
We consider the potential deficiency described in the attachments a potential significant deficiency per 10CFR5 0. 55 (c) and are hereby notifying you as required.
We believe that the Colt Industries report submitted under the provisions of 10CFR, Part 21 provides the information required for 10CFR50.55(e) reporting.
Therefore, we anticipate that this letter will be our only report to you on this subject.
BOI!!1035&
Mr. Boyce Grier, Director Office of Inspection and Enforcement Region I United States Nuclear Regulatory Commission We will of course assure that the Limerick diesel generators are corrected in accordance with instructions received from the vendor.
Sincerely, S /df RJL:drd Attachment Copy to:
Director of Inspection and Enforcement United States Nucler Regulatory Commission Washington, D.C.
20555 J. P. Durr, USNHC Resident Inspector, LGS l
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E.L. Fay E.D. Greenc Septemb r 22, 1980 W.T. Hailey J. Morgan G. Olson J.W. Tangye
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Office of Inspection & Enforcement U.S. tluclear Kogulatory Conmission 799 Roosevelt Road Glen Ellyn, Ill.
60137 Attention:
Mr. James G. Keppler, Director, Region III Subj ect:
Colt Industries-Fairbanks Morse Engine Division Emergency Of esel Generators
, South Carolina Elcetric & Gas Co.-Sunner Station A-W Part 21 Report - Geloit Power Systems Generators Possible Field Insulation Damage,
Gentiemen:
This is to confirm our verbal report (R.H. Beadle to D.W. Hayes) of September t
19, 1980.
l A Beloit Power Systems generator in commercial se'vice at Sitka, Alaska lost its field because a lead,between the collector rings and the field coils shorted to the rotor and burned in two pieces at the point of the short.
Subsequent examination of another generator c identical design at the same installation l
showed frayed insulation at a clamp (same location as the burn through) which secures the lead to the rotor. This unit was operating satisfactorily but if the insulation damage were to progress the possibility of grounding the lead to the rot.or exists.
To determine if the problem might exist at other-locations our chief electrical engineer was sent to' Provo, Utah which has four generators of identical design.
l He has reported by phone that two of the four at Provo have frayed insulation at the clamp but that there was no indication of loss of field.
Concurrent with our inspection at Prcyc, Sel,oit Power Systems 'reas asked to evaluata the cause of frayed insulation and also if any other generators might have the same problem.
Their verbal report to us is that the cause of fraying is poor workmanship in installation of the clamps and that there.are other generators of identical design in this area.
Specifically the eight generators shipped to Limerick (Philadelphia Electric) are of the identical design in.the area where poor workmanship is known to have caused a problem.
Our plan is to inspect the Limerick generators and repair any poor workmansi,is which may be found.
Beloit Power Systems a,lso reports verbally that the de:,ign in this area for 5 and 6 frame alternators has been similar for a number of years and it i.s therefore possible that the problem may extend to operating units.
The list of Fairbanks Horse Model 38TDC-1/8 OP generator sets equipped with 5 or 6 frame Beloit Power Systems generators is as follows3
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g U.51 !;uclear Regulat.ory Comission September 22, 1980
- G10. Ellyn, Ill.
2665 W for Horthear.
Ut.111 ties, Millstone Hucicar Plant - Unit i 1.
1 Unit 2.
2 Units -
2500 W for Carolina Power & Light, Robinson Nuclear Plant.
3.
2 Units -
3000 W for Horthern States Power, Prairic Island Huclear Plant.
4.
2 U. nits -
3000 KW for Vers:cnt Yankee Corp., Vermont Yankee Nuclear Plant.
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5 2 Units -
3000 m for Metropolitan Edison Three Mile Island Huclear Plant 6.
4 Units - 3750 KW for Philadelphia Electric Co., Peachbottom Hucleae Stalig
$_2_hJ.L 7.
3 Units - 3250 W for Baltirore Gas & Electric Ccapany, Calvert Cliffs Nucicar Stations il and #2.
8.
2 Units - 3000 W for Florida Power Corporation, Crystal River No. 3' 2 Units - 3000 m for Jersey Central Power and Light Company. Three Mile 9
Island Nuclear Station No. 2 9
3250 W for Georgia Power Company, Hatch Nuclear Plant fl.
J 3
10.
3 Units -
11.
2 Units - 3250 W for Iowa Electric Light & Power Co., Duane Arnold Nuclea.
1 Plant.
4 12.
4 Units. - 3000 KW for Virginia Electric & Pow'er Co., North Anna Nuclear i
Plant si L 12.
I 13.
2 Units - 3250 KW for Northeast Utilities, Millstone Nuclear Plant - Unit t
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14.
2 Units - 3250 W for Alabama Power Company, Farley Nuclear Plant Units il 15.
2 Units - 3250 KW for Arkansas Power & Light Company Arkansas Nuclear 0.-a 1
Unit (2.
!i 16.
2 Units - 3250 W for Georgia Power Company, Hat' h Nuclear Plant #2 c
(with option for additional unit).
i' i
3250. W for Detroit Edison Company, Enrico; Fermi d.2 _..._.=
i 17.
4 Un.i.ts..
,3250 W fm-Philadelchic Elec_tric Company, L1mericak Nuclea",'
/18.
8 Units - ~
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Station #1 & #2.
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It is suggested the.t the generator field leads be inspected for in:.ulation. dainag<
at the ciamps attaching these. leads to the generator rotor.
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A conference call with HRC duty officer, Personnel from Prairie Island Hucleae Plant, R.H. Beadle, and C. Evenson of Beloit Power Systems was arranged for I
9:30 AM 9/20/80 so~ that the method of inspection could be explained and tc.nec l
for use by the NRC in explaining the inspection required to other sites.
Mr. Ev was the spokesman and described the method of inspection to visual'y check for ii insulation distress at clamps and for cicarance between generator field leads and the generator fan.
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Edited written instructions covering the inspection method have ~been requested
'i of ueloit Power Systems.
We will contact NRC upon receipt to dir. cuss method
'a of distribution.
I Very truly y'ours.
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.M. Foriarty I
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U.S. Nuclear Regulatory Comission j
c/o Document Management Oranch I
Washington, D.C.
20555 c=
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