ML13316A066
| ML13316A066 | |
| Person / Time | |
|---|---|
| Site: | San Onofre, Calvert Cliffs  |
| Issue date: | 09/10/1990 |
| From: | Thomas W SULZER BINGHAM PUMPS, INC. |
| To: | NRC |
| References | |
| REF-PT21-90 NUDOCS 9011080263 | |
| Download: ML13316A066 (1) | |
Text
SULZER BINGHAM 2800 N.W Front Ave.
- RO Box 10247
- FAX (503) 226-5286
- ITT 4742014 September 10, 1990 U.S. Nuclear Regulatory Commission Vendor Program Branch Washington, D.C. 20555
Dear Sir or Madam:
Per the requirements of 10CFR Part 21, Sulzer Bingham Pumps Inc. advises of a defect condition on a Reactor Coolant Pump Seal Housing supplied to Baltimore Gas & Electric Company's Calvert Cliffs Units 1 and 2.
The condition was first observed on Unit 1, Pump 12A upon seal pressurization prior to start-up. The defect is manifested by failure of this seal to stage. This does not constitute total seal failure.
SBPI evaluation has identified the defect as a mis-drilled hole. Visual examination of the remaining four assemblies in Unit 2 will be performed at Calvert Cliffs to assure acceptance. Verification of the other three Unit 1 RCP Seal Housings at Baltimore Gas & Electric has been by proper seal staging and function.
Similar housings are installed at Southern California Edison's San Onofre Units 2 and 3 and showed no signs of deficiency upon start-up in the years past, but an information letter will be sent concurrently with the one going to Baltimore Gas &
Electric.
Yours truly, Wayne D. Thomas Director, Corporate Quality cc: R. L. Ayers G. D. Halas T. W. McAfee P. L. McCullough T. R. Morton S. M. Nelson S. Pace G. J. Parks J. Wood NRC File WDTO9-04:cg 9011080263 900910 a 9 PDR ADOCK 05000206 PNu