ML20030B129
| ML20030B129 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 07/28/1981 |
| From: | Kemper J PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8108060109 | |
| Download: ML20030B129 (2) | |
Text
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D PHILADELPHIA ELECTRIC COMPANY 2301 M ARKET STREET b gy P.O. BOX 8699
' 9bI PHILADELPHI A. PA.19101 (215)841 45o2 W9CE PetE$1DE Pe7 JUL 281981 Mr. Boyce H. Crier, Director Office of Inspection and Enforcement, Region I United States Nuclear Regulatory Commission 631 Park Avenue W '
King of Prussia, PA 19406
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SUBJECT:
Significant Deficiency Report No. 38 Interim Report No. 2 on Defects in i AUG 0 51981
- i9 Limitorque Valve Motor Operators M
uA W@M" Limerick Generating Station Units 1 and 2
' i NRC Construction Permit Nos. CPPR-106, 107
REFERENCE:
- 2) Interim Report No. 1, J. S. Kemper (PECO) to B. H. Grier (USNRC), May 28, 1981 FILE: QUAL 2-10-2 (SDR 38)
Dear Mr. Grier:
This is our second interim report regarding certain deficiencies in Limitorque valve motor operators supplied for use at Limerick Generating Station. Previous information was forwarded to you via the references.
The inspection of a sample of 46 Limitorque motor operators is now complete and the inspection data sheets have been submitted to the engineering organizations of both PECO and Bechtel. Analysis of the data is not yet finished, but preliminary indications are that a significant number of the operators have at least one of the deficiencies previously identified in Interim Report No. 1.
These deficiencies include:
limit switch rotors with cracks or misdrilled pin holes and the use of non-qualified terminal blocks. An additioul problem was noted during the latter part of the inspection. On SMB000 operators the torque swit stationary contact screws broke and contact finger anchor screws stripped when tightened. This occurred at less than the required tightening torque.
8108060109 810728 DR ADOCK 05000352 fe O PDR
o ;
Mr. Boyce H. Grier Upon completion of our analysis of the inspection data, we will formulate a program which will include a 100% inspection of the safety related Limitorque motor operators at Limerick. Deficiencies found during the inspection will be resolved.
We will submit a further report on this subject by September 30, 1981.
Sincerely, fC[
Copy to:
J. E. Durr, LGS Resident USNRC Inspector Director of Inspection and Enforcement United States Nuclear Regulatory Commission Washington, DC 20555 i
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