ML13330A239
| ML13330A239 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 02/13/1981 |
| From: | Haynes J SOUTHERN CALIFORNIA EDISON CO. |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| NUDOCS 8103100183 | |
| Download: ML13330A239 (2) | |
Text
Southern California Edison Company P
BOX ((00 2244 WALI'JT GROVV AVENUL ROSEMEAD CALIFOI(NIA 91770 J. G. HAYNES TELEPHONE MANAGER OF NUCLEAR OPERATIONS E213) 5 72 47 February 13, 1981 Docket No. 50-206 San Onof Unit 1 U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region V 1990 North California Boulevard 0
2 Suite 202, Walnut Creek Plaza
- 14s, Walnut Creek, California 94596 Attention: Mr. R. H. Engelken, Director
Reference:
Letter dated October 15, 1980 from NRC (R. H. Engelken) to SCE (Dr. L. T. Papay)
The referenced letter requires that our procedures include accountability controls for all tools, equipment, ma terials and supplies that are used in steam generator channel heads whenever expandable seals, and their associated cover plates, are not in place in the nozzles of the reactor cool ant system piping. In order to minimize radiation exposure associated with maintenance of the expandable seals, they are not retained in service except when necessary such as during channel head decontamination. Accordingly, we continue to use the required accountability controls when the expandable seals are not in service, such as during ongoing sleeving operations.
When the expandable seals are not.in service, we use a tape seal between the nozzle cover and steam generator to prevent inadvertent entry of foreign material into the re actor coolant system. Administrative controls are used to verify channel head cleanliness prior to removal of this tape seal and nozzle cover.
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Page 2 U. S. Nuclear Regulatory Commission February 13, 1981 Our continuing review of steam generator repair activities indicates that use of the required accountability controls when the nozzle covers are in place with the tape seals, in lieu of the expandable seals, results in unnecessary delay and consequent radiation exposure. Therefore, your con currence is requested in the following clarification of the re quirement for accountability controls in the referenced letter:
These (accountability) controls are to be in effect whenever nozzle cover plates and their appropriate seals are not in place in the noz zles of the reactor cooling system piping."
Your prompt attention to this request will be greatly appreciated.
If you have any questions, please let us know.
Sincerely, cc: L. F. Miller (NRC Site Inspector, Unit 1)