ML20010A225
| ML20010A225 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 08/03/1981 |
| From: | Parker W DUKE POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8108110197 | |
| Download: ML20010A225 (2) | |
Text
.
- ff -
y:D&kE Powen CoMPuy PowEu Bunnotxo 4e2 SocTin Ciiuncar STREE,
IMHI.OTTE, N. C. 20a42 b
,d r.p,0 6 WI LLI AM O. PAR K E R. J R.
VicF Pats orNT TE LEeno N E:Aata 704 Sigau PaooucY oM 373-4083 August 3, 1981 Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Commission Region II 101 Marietta' Street, Suite'3100 Atlanta, Georgia 30303 Re: Catawba Nuclear Station Unit 1 Docket No. 50-413
Dear Mr. O'Reilly:
Pursuant to 10 CFR 50.55e, please find attached Signigicant Deficiency Report SD 413/81-15.
Very ruly yours,
/
h,cu.
nn a..
William O. Parker, Jr.
RWO/php Attachment cc: Director Resident Inspector Office of Inspection and Enforcement Nuclear Regulatory Commission U. S. Nuclear Regulatory Commission Catawba Nuclear Station Washington, D. C. 20555 M+i P,ij<
3 e a @& $ r %
Q
?
N?fhNly muj a
dj 8108110197 810803
- DR ADOCK 05000413 PDR
91 -
CATAWBA NUCLEAR STATION REPORT NUMBER: SD-413/81-15 REPORT DATE:
August 3, 1981 FACILIT_Y:
Catawba Nuclear Station, Unit 1 IDENTIFICATION OF DEFICIENCY:
Five unacceptable linear indications on the body of a Walworth valve.
INITIAL REPORT:
On July 2, 1981 Mr. Art Johnson of NRC Region II, Atlanta, Georgia was notified of this deficiency by Mr. J. K. Berry, Mr. W. O. Henry, and Mr. M. G. 0steen of Duke Power Company, Charlotte, NC 28242.
SUPPLIER AND/0R COMPONENT:
The valve in question is a six inch, carbon steel, active, ASME Class 3, electric motor operated gate valve manufactured by Walworth-Greensburg (Serial Number D-63779, Item 28-235).
DESCRIPTION OF DEFICIENCY:
During magnetic particle examination of Weld ICAl2-7, five linear indications approximately 3/8 inch long were discovered on the body of the subject valve.
Per Walworth's instructions, Duke's Construction Departnmot ground the metal around these indications down to the minimum wall thicknes',, afterwhich, indications still existed.
Reference Nonconforming Item Report Serial Number 12012.
ANALYSIS OF SAFETY IMP _LICATIONS:
This valve passed Walworth's ncn-destructive examination and shell hydrostatic test.
These linear indication 3 became relevant as a result of welding this valve into the pipeline. There has not been a recurring problem with relevant indications on other Walworth valves; therefore, thit deficiency is judged to be an isolated case and is not a generic problem.
Since the Duke Construction Department has determined that these indications violated the minimum wall thickness, the pressure boundary of this valve is not assured.
CORRECTIVE ACTION:
Valve Serial Number D-63779 has been replaced by another valve under Item 28-235.
Valve Serial Number D-63779 is presently in warehouse storage as a spare valve.
One of the following two courses of action will be implemented prior to use:
1.
The valve body will be scrapped and the remaining parts will be used as spare parts.
2.
The valve body will be weld repaired per ASME Section III 1971 Edition through the Summer 1973 Addendum to restore the valve to as-new condition.
_