ML20071H711
| ML20071H711 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 05/13/1983 |
| From: | Tucker H DUKE POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, SD-414-83-08, SD-414-83-8, NUDOCS 8305250449 | |
| Download: ML20071H711 (2) | |
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DUKE POWER GOMPANY
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C11A14LoTTE, N.C. 28242 ilAL 15. TUCKER TELEPHONE
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m a car son.1 (704) 373-4331 May 13, 1983
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Mr. James P. O'Reilly, Regional Administrator U. S. Nuclear Regulatory Commission Region II C
j 101 Mariette, Street, NW, Suite 2900 m
.0 Atlanta, Georgia 30303
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p Q'a Re: Catawba Nuclear Station 125 Unit 2 Docket No. 50-414 c3 g.
Dear Mr. O'Reilly:
Pursuant to 10 CFR 50.55e, please find attached Significant Deficiency Report SD 414/83-08.
Very truly yours,
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Hal B. Tucker Rkl0/php Attachment cc: Director INPO Records Center Office of Inspection and Enforcement Suite 1500 U. S. Nuclear Regulatory Commission 1100 Circle 75 Parkway Washington, D. C. 20555 Atlanta, Georgia 30339 Mr.. P. K. Van Doorn Mr. Robert Guild NRC Resident Inspector Attorney-at-Law Catawba Nucleer Station P. O. Box 12097 Charleston, South Carolina 29412 Palmetto Alliance 2135 Devine Street Columbia, South Carolina 29205 I
8305250449 830513 gDRADOCK 05000414 PDR l
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DUKE POWER COMPANY CATAWBA NUCLEAR STATION SIGNIFICANT DEFICIENCY REPORT NUMBER: SD 414/83-08 REPORT DATE: May 13, 1983 FACILITY: Catawba Nuclear Station, Unit 2 IDENTIFICATION OF DEFICIENCY: A tack weld was found on the shaft / rotor assembly of a motor used on a limitorque operator, which was installed on a Class I Kerotest valve. The deficiency was identified on February 2, 1983 INITIAL REPORT:
Initial report was made to Greg Nejfelt, Region 11 NRC, on April 15, 1963 by tiess rs. J. K. Berry, H. E. Edwards and C. A. Bell, of Duke
. Power Company, Charlotte, NC 28242.
COMPONENT AND SUPPLIER: Reliance motor, S/N 716251-PB.
The motor was mounted on a model SMB-000 limitorque operator, S/N 244815 and installed on a Kerotest item 9J-510 valve.
DESCRIPTION OF DEFICIENCY: The-deficiency was found during inspection of the valve / operator per Construction procedure CP-168.
During this inspection, a tack weld was found where the shaf t connects to the rotor in the motor of the limitorque operator. A feeler gauge indicated a space of 0.005" between. the shaft and rotor. The standard assembly procedure for a Reliance shaft / rotor assembly is a press fit of these parts. The tack weld of the shaft to the rotor is a departure from standard Reliance assembly procedures and violates the operator qualification by type test.
ANALYSIS OF SAFETY IMPLICATIONS: The valve application is active Class IE.
Although no failure has occurred, the unqualified construction of the shaft / rotor provides inadequate assurance that the motor and actuator will perform its safety related function.
CORRECTIVE ACTION: The affected motor has been sent back to the manufacturer (Reliance) for evaluation. Since a tack weld is not in accordance with standard ' assembly procedures, the shaf t/ rotor assembly will be repai red, or replaced and : the r:otor returned to Duke.
Reliance's evaluation is expected by June 3, 1983. A final report will be submitted at that time.
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