ML13316A079
| ML13316A079 | |
| Person / Time | |
|---|---|
| Site: | Perry, Catawba, Harris, Grand Gulf, River Bend, Vogtle, San Onofre, Comanche Peak, Rancho Seco, Bellefonte, Washington Public Power Supply System, Shoreham, Hartsville  |
| Issue date: | 06/19/1991 |
| From: | Guntrum B COOPER INDUSTRIES, INC. |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| REF-PT21-91 157, NUDOCS 9106260262 | |
| Download: ML13316A079 (7) | |
Text
Cooper Industries Cooper Energy Services 14490 Catalina Street
-San Leandro, CA 94577-5516 415 614-7400 Fax 415 614-7409 COOPER June 19, 1991 Director of Nuclear Reactor Regulations U.S. Nuclear Regulatory Commission Mail Station P1-137 Washington, DC 20555 Report #157
Dear Sir,
In accordance with the requirements of Title 10, Chapter 1, Code of Federal Regulations, Part 21, Enterprise Engine
- Services, a Division of Cooper Industries, hereby notifies the Commission of a potential defect in a component of a DSR or DSRV Standby Diesel Generator System.
There exists a potential problem with intake and exhaust power valve springs which could result in engine non-availability.
Cooper Industries has supplied these parts as replacement components to the following sites:
UTILITY SITE SERIAL #
MODEL LILCO Shoreham 74010-12 DSR-48 ENTERGY Grand Gulf 74033-36 DSRV-16-4 GULF STATES River Bend 74039-40 DSR-48 CP&L Shearon Harris 74046-49 DSRV-16-4 DUKE Catawba 75010-13 DSRV-16-4 SO CAL ED San Onofre 75041-42 DSRV-20-4 CEI Perry 75051-54 DSRV-16-4 TVA Bellefonte 75080-83 DSRV-16-4 WPPSS WPPSS I 75084-85 DSRV-16-4 TU ELECTRIC Comanche Peak 76001-04 DSRV-16-4 GEORGIA Vogtle 76021-24 DSRV-16-4 TVA Hartsville 77024-35 DSRV-16-4 SMUD Rancho Seco 81015-16 DSR-48 The specific springs under discussion are manufactured by Associated Spring in
- Corry, Pennsylvania.
They are installed as a subcomponent of spare cylinder heads (4 springs per cylinder head) or provided as individual spare components by Cooper Industries.
910626026_2 910619 PDR
- ADOCK 05000206 PDR
U.S Nuclear Regulatory Commission Report #157 6/19/91 Page 2 The subject springs can be identified by their paint color; brown spring with a blue stripe.
The spring part number is 03-360-02-OM. They may also be installed on cylinder heads identified as part numbers 1A-5559, 1A-6240, 1A-6266, 1A 6446, 1A-7062 and 1A-7680.
In the course of inspecting existing stock of valve springs, we noted draw marks on some of the springs on the inside diameter. Destructive testing was performed on a sample lot to establish the depth of any draw marks and determine any potential for failure.
Our testing resulted in (1) piece with a seam while several others had draw marks deeper than allowed by specification.
All stock was removed from stores and returned to Associated Spring for further testing, whereupon (2) additional pieces were identified as having a seam.
The existence of a seam is not allowed by our specification nor are draw marks deeper than 0.002".
We are unable to determine how many, if any, valve springs with seams or draw-marks are in the field since previous inspections were based on sample lots.
Our level of concern,
- however, is significantly reduced due to the fact that there are no reported failures of this spring in any nuclear or non nuclear installations.
It is important to note that the subject springs were received in 1986 with hundreds distributed to a variety of installations since that time; the commercial sites having accumulated thousands of hours in many cases.
The number of operating hours is significant as the fatigue failure resulting from such an indication should occur within approximately 740 hours0.00856 days <br />0.206 hours <br />0.00122 weeks <br />2.8157e-4 months <br /> (101 operating cycles).
It is our recommendation that the subject power springs be inspected on a periodic basis such as during the rotating refueling outage inspection of the cylinder heads.
Any spring displaying a draw mark on the I.D. that is visible to the naked eye (through the painted surface) should be removed, discarded and replaced with an acceptable spring.
It is our further recommendation that this periodic valve spring inspection should be included in the mechanical maintenance procedures and that the inspection should apply to all valve
- springs, regardless of their original manufacturer.
COOPER
U.S. Nuclear Regulatory Commisssion Report #157 6/19/91 Page 3 A copy of this letter will be sent to all of the sites referenced in Paragraph 2 of this letter as indicated by the carbon copy list.
Our evaluation of this potential problem was completed on June 17, 1991.
Sinc rely, Bruce C.
ntrum Manage ality Assurance BCG:ej cc:
see attached COOPER
U.S Nuclear Regulatory Commission Report #157 6/19/91 Page 4 cc:
Gulf States Utilities P.O. Box 220 St. Francisville, LA 70775 Attention:
- Director, Nuclear Licensing Carolina Power and Light Co Harris Nuclear Project P.O. Box 165 New Hill, NC 27562 Attention:
Mr. C.S. Hinnant Plant Gen Mgr Carolina Power and Light Co P.O. Box 1551 Raleigh, NC 27602 Attention:
R.A. Watson Sr. Vice President Carolina Power and Light Co Harris Nuclear Project P.O. Box 165 New Hill, NC 27562 Attention: Mr. R.B. VanMetre Mgr Tech Support Carolina Power and Light Co Shearson Harris Nuclear Plant P.O. Box 165 New Hill, NC 27562 Attention:
H.P. Beane Manager, QC Duke Power Company P.O. Box 1007 Charlotte, NC 28201-1007 Attention: W.T. Robertson V.P. Procurement Southern California Edison P.O. Box 128 San Clemente, CA 92674-0128 Attention:
Mgr of Nuclear Oversight COOPER
U.S. Nuclear Regulatory Commission Report #157 6/19/91 Page 5 cc:
(continued)
Texas Utilities Electric Skyway Tower 400 North Olive Street, L.B. 81 Dallas, TX 75201 Attn:
W.J. Cahill, Exec VP Cleveland Electric Illuminating Co.
Perry Nuclear Power Plant P.O. Box 97 Perry, OH 44081 Attention: A. Kaplan C.E.I.
Perry Nuclear Power Plant P.O. Box 97 Perry, OH 44081 Attn:
Russell J. Tadych, Manager, QC C.E.I.
Perry Nuclear Power Plant P.O. Box 97 Perry OH 44081 Attn:
Mr. S. Kensicki Director, Perry Tech Dept Tennessee Valley Authority 1101 Market Street, LP 5N 152B Chattanooga, TN 37402 Attn:
Mr. T.W. Overlid Mgr. Nuclear Exper Review Tennessee Valley Authority WT10 B-77 H-K 400 W. Summit Hill Drive Knoxville, TN 37902 Attention:
Tim Chan Washington Public Pwr Supply P.O. Box 460 Richland, WA 99352 Attention: Mr. L.C. Oakes Mgr, WNP-1 Engineer COOPER
U.S. Nuclear Regulatory Commission Report #157 6/19/91 Page 6 cc:
(continued)
Tennessee Valley Authority 400 W. Summit Hill Drive WT10 C126 H-K Knoxville, TN 37902-1499 Attention:
R.C. Weir Sacramento Municipal Utility District 14440 Twin Cities Road Herald, CA 95638 Attn:
Paul E. Turner Manager, Tech Support Georgia Power Company Plant Vogtle P.O. Box 1600 Waynesboro, GA 30830 Attention: Mr. W.B. Shipman General Manager ENTERGY P.O. Box 756 Port Gibson, MS 39150 Attn:
C.R. Hutchinson General Manager, SERI ENTERGY P.O. Box 429 Port Gibson, MS 39150 Attn:
Fred Titus, Director Nuclear Plant Engineering ENTERGY P.O. Box 31995 Echelon One 1340 Echelon Parkway Jackson, MS 39286-1995 Attention:
T.H. Cloninger V.P. Nuclear Engineering Long Island Lighting Company Shoreham Nuclear Pwr Station North Country Road Wading River, NY 11791 Attn:
Mgr Nuclear Operations Support Department COOPER
U.S. Nuclear Regulatory Commission Report #157 6/19/91 Page 7 cc:
(continued)
Duke Power Company Nuclear Production Department P.O. Box 1007 Charlotte, NC 28201-1007 Attn:
Mngr, Nuclear Safety COOPER