ML20127D149
| ML20127D149 | |
| Person / Time | |
|---|---|
| Site: | Vogtle, Comanche Peak  |
| Issue date: | 09/04/1992 |
| From: | Labrun H COOPER INDUSTRIES, INC. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| REF-PT21-92 QGC-9050, NUDOCS 9209110205 | |
| Download: ML20127D149 (3) | |
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. Cooper industries Cooper-Bessemer Reciprxating Products Division 150 Uncoln Avenue Grove City. PA 16127 1898 412 455-8000 September 4,1992 COOPER Our Ref: OCG-9050 Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Dear Sir t
in accordance with the requirements of the Nuclear Regulatory Commission Title 10, Chapter 1, Code of Federal Regulations, Part 21, Cooper-Bessemer Reiprocating Products Division, a division of Cooper Industries, hereby notifies th 'smmission of a pdential defect in a component of a DSRV-16-4 Enterprise Standby Ciesel Generator System. There exists a potential problem with the 02-425-03-AF jaciset water pump shaft.
s These shafts are installed, or may be in stores as a replacement part. The following is a listing of affected Utilities, dates of shipment, and customer order numbers where these shafts are located:
SALES DATE CUSTOMER SERIAL ORDER #
SHIPPED P.O.
OUANTITY NO.
5, N43657 8/21/87 ENTERGY 1
N/A GG10297
., f 74033/34 N45300 9/19/87 ENTERGY 1
N/A 9/26/87 MP709921 74033/34 N46508 11/6/87 GEORGIA POWER 1
N/A 12/29/87 PAV2-25117 2
76021/24 N47695 10/26/88 KOREA 7 & 8 1
N/A POL 872712D 81021/24 i
N44394 6/25/87 GEORGIA POWER
- 1 h/A FAV-29239 76021/24 C00E7100*
8/20/91 TEXAS UTILITIES
'3
- lul602, S0001118 S6A 03, 04
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Page 2 OCG-9050 September 4,1992 4
This condition was first discovered at T.U. Electric's Comanche Peak Steam Electric l
Station during the replacement of the originally supplied shaft on Unit 2B (Enterprise S/N 76004).
The pump shaft and gear drawings define mating dimensions of a 1.500"/1.498" taper per foot on both parts. The replacement chaft taken from stock at T.U. had a 3.000 inch taper per foot in this mating area. Subsequent inspection of two additional shafts at both T.U.
and five at Cooper revet.1 these parts also had incorrect tapers machined on them. While it may seem apparen* that a side by sloe comparison of the two components (shaft and l
gear) would immediately highlight the physical discrepancy between them, the mainten ince crew on site at T.U. did attempt to assemble the gear to the new shaft before noting the problem.
Due to tne physical differences between the gear and shaft. It is unlikely that one of these mis-machineo shafts is actually assembied in one of the s;
'by diesel units. Also, because of the mis-match bJtween the geat and shaft it is u.. ely that the unit, once assembled, would operate for very long without a failure occurring.
Ths utilities affected in the previous list are only those which have received shafts which were purchased from a supplier of Enterprise or Cooper-Enterprise from March 1987 I
through the end of 1931. Al! prev!c ts shafts were supplied or manufactured at Enterprise and had in-process inspection with the proper gauging noted on the routing process sheet.
l The root cause for this defect is mis-machining of the taper by our vendor. The drawing defines the taper as 1.500"/1.498" per foot, however pictorial!y more closely resembles a 3.00" taper per foot. The parts remaining in Cooper inventory resemble the shaft as pictorially shown on the drawing. Only the 8 shafts at T.U. and Cooper are known to have i
th!s defect, but because the possibility of this defect being present in previously supplied I
parts. all utilities which have received shafts from these purchased lots are being included in this notification.
Our corrective actioriincicdes recall of all shafts as listed acave, changi% P 3 drawing to pictorially dep4 se correct iaper, and cnanging quality inspection plan'., to include an insoection of the taper with a taper gauge.
l Sincerel,
Vice President and General Manager HAUkfl cc:
D. T. Blizzard - CES/GC A. D. Gillette - CES/GC R. G. Billig-CES/GC J. A. Manno - CES/ Alameda B. C. Guntrum - CES/ Alameda R. L..Nimmo - CES/ Alameda d
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. Page 3
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OCG 9050 l_
{teptember 4,1992 -
- cc:
Mr. Walter Haass NRC One W:.ite Flint North Mailstop 9D4 Washington, DC 20555-Entergy Operations -
P. O. Box 429 4
Echelon One -
1340 Echelon Parkway i
Jackson, MS' 39286-1995 Attn:
T. H. Cloninger I
Vice Pres. Nucl. Eng, i
Entergy-i P. 0; Box 429
- Port Gibson, MS 39150 -
Attn:
Fred Titus Director, Nuclear Plant Engineering Entergy P. O. Box 756 Port Gibson, MS 39150 Attn:
Vice President, Nuclear Operations Entergy.
P. O. Box 756 Port Gibson, MS 39150 Attn:
D. L. Pace Design Engineering.
Georgia Power Company.
Plant Vogtle P. O. Box 1600 Waynesboro,'GA 38030_.
1 L
ll Attn:
- Mr. W.- B.' Shipmen -
Quality _ Control l-Texas Utilities Electric:
L
-~400 North Olive Street, L.B. 81-i:
Callas, TX 75201 Attn:
W. J. Cahill -
l_
Group Vice President Mr/Oh, Young Sik
- Plant Mgr., KORI 3 & 4' I_
Korea. Electric Power Corp.
216 Kori, Jangan-Eup
-Yangsan-Gun-
' Kyungnam,- Korea 626-950 4
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