ML20137P241
| ML20137P241 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 01/16/1986 |
| From: | Tucker H DUKE POWER CO. |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-86, REF-PT21-86-045-000 PT21-86-045-000, PT21-86-45, SD-414-86-02, SD-414-86-2, NUDOCS 8602040424 | |
| Download: ML20137P241 (2) | |
Text
_
- - =
DUKE Powen Gonem P.O. IM)X 331150 CHAMLOTRY., N,0. 211242 HALH. TUCKER retyp,umn
']
p}*{p (704) 37:M&18
,.r-a January 16, 1986 Dr. J. Nelson Grace, Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Re:
Catawba Nuclear Station, Unit 2 Docket No. 50-414 Significant Deficiency No. 414/86-02
Dear Dr. Grace:
Pursuant to 10 CFR 50.55(e), please find attached Significant Deficiency Report No. 414/86-02.
i Very truly yours, kb f$
Hal B. Tucker i
LTP:slb Attachment j
cc:
Director l-Office of Inspection and Enforcement J
U. S. Nuclear Regulatory Commission Washington, D. C.
20555 i
INPO Records Center Suite 1500 1100 Circle 75 Parkway i
l Atlanta, Georgia 30339 l
NRC Resident Inspector l
Catawba Nuclear Station l
1 I
8602040424 B60116 PDR ADOCK 05000414 PDR g
I i
L
- 97
Catawba Nuclear Station REPORT NUMBER:
SD 414/86-02 REPORT DATE:
January 16, 1986 FACILITY:
Catawba Nuclear Station, Unit 2 IDENTIFICATION OF DEFICIENCY:
A commercial diesel application has experienced valve spring failures.
This deficiency was identified by a 10 CFR 21 letter from Transamerica Delaval Inc. dated November 12, 1985.
INITIAL REPORT:
On December 17, 1985, Mr. Chuck Burger of the NRC Region II, Atlanta, Georgia office, was notified of this deficiency by Mr.
L.
R.
Davison, Mr.
M.
L.
Sanger, Mr.
R.
L.
Oakley, Mr.
J.
M.
Lines, and Mr.
R.
O. Sharpe of Duke Power Company, Charlotte, N.
C.
COMPONENT AND/OR SUPPLIER:
Transamerica Delaval Inc., of Oakland, California, supplied the valve springs as a part of the Catawba diesels.
The valve springs which failed were manufactured by Betts Spring Company, San Leandro, California.
DESCRIPTION OF DEFICIENCY:
Recently, a total of 12 valve spring failures were experienced on a ship having Transamerica Delaval Inc. (T.D.I.) DMRV-16-4 diesel engines for propulsion.
The failures occurred at approximately 5000-7000 hours of operation.
These failures were sporadic in nature, and do not necessarily indicate problems in other applications.
The failures were restricted to Betts springs which are identifiable by a white stripe.
Since the failures are restricted to a single application, it is suspected the failures may be " batch" related, and not indicative of defects in all Betts valve springs with a white stripe.
ANALYSIS OF SAFETY IMPLICATIONS:
Based on T.D.I.'s investigation results, the visual inspection results of the Catawba diesel valve springs (no indications of valve spring distress or failure), and the 5000-7000 hours of operation prior to the failure cited above, it is reasonable to expect the valve springs at Catawba to continue to perform satisfactorily.
Since there is lack of information to substantiate that the valve springs will perform indefinitely without a failure, this item is evaluated reportable.
CORRECTIVE ACTION:
As recommended by T.D.I.,
in their letter to us dated December 31, 1985, the existing valve springs are being run l
following a close visual inspection for any sign of distress or abnormality.
Furthermore, as recommended by T.D.I.,
the Betts springs will be changed out with new springs, to be furnished by T.D.I. as they are available, during the first appropriate refueling outage.
L