ML20010F620
| ML20010F620 | |
| Person / Time | |
|---|---|
| Site: | Marble Hill |
| Issue date: | 08/24/1981 |
| From: | Shields S PSI ENERGY, INC. A/K/A PUBLIC SERVICE CO. OF INDIANA |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, S81-10, NUDOCS 8109100449 | |
| Download: ML20010F620 (2) | |
Text
MM/868k+
s s
.js c3 A
Y 1f PUBLIC 7{[ 6. L i $
.3 SERVICE INDIANA 1 SEPys.,i> F_.
6 magma a S. W. Shields
\\
Senior Vice President -
Q Nuclear Division August 24, 1981 S81-10 Mr. James G. Keppler, Director Docket Nos.: STN 50-546 U. S. Nuclear Regulatory Commission STN 50-547 Region IIT Construction Permit Nos.:
799 Roosevelt Road CPPR - 170 Glen Ellyn, Illinois 60137 CPPR - 171 Marble Hill Nuclear Generating Static n - Units 1 and 2
Dear Mr. Keppler:
On July 24, 1981 Mr. T. D. Geib of Public Service Company of Indiana, Inc. (PSI) notified your office of a potentially reportable item as required by 10 CFR 50.55(e). An inspection of Limitorque valve motor operators revealed that an underrated terminal block had been installed in several of the operators.
Further investigation deterrined that this terminal block, Marathon 300 series, had originally been rated for the specified service conditions of 600 volts and 30 amps, but had been subsequently derated to 300 volts and 30 amps.
PSI is presently reviewing the actual voltage and current levels which will be applied to the Marathon 300 series block and whether it is suitable for this service. This review will also consider current industry standards and practice.
Based upon this review, PSI will determine what corrective action, if any, is necessary.
This letter is intended to fulfill the requirements of an interim report as defined ')y 10 CFR 50.55(e). A further repore will be filed on or before Decem >er 11, 1981.
191 8109100449 810824 f, p PDR ADOCK 05000546 PDR S
P. O. Box 190, New Washington, Indiana 47162 812. 289. 1000 M6 31 1981,
A PUBUC SERVICE INDIANA Letter:
Mr. J. G. Keppler August 24, 1981 If you have any questions on this report please feel free to contact me.
Sincerely, S. W. Shields TDG/bak cc: Director of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 E. R. Schweibinz, P. E.
J. J. Harrison