ML13308B432
| ML13308B432 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 07/26/1978 |
| From: | Head J Southern California Edison Co |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| IEB-78-07, IEB-78-7, NUDOCS 8102190139 | |
| Download: ML13308B432 (2) | |
Text
Southern California Edison Company P.0. BOX 800 2244 WALNUT GROVE AVENUE J. T. HEAD, JR.
ROSEMEAD, CALIFORNIA 91770 TELEPHONE VICE PRESIDENT 213-572-1472 July 26, 1978 U.S. Nuclear Regulatory Cawnission Office of Inspection and Enforcement Region V Suite 202, Walnut Creek Plaza 1990 North California Boulevard Walnut Creek, California 94596 Attention: Mr. R. H. Engelken, Director Docket No 0-206 San qnofre n
Dear Sirs:
IE Bulletin No. 78-07 Protection Afforded by Air-Line Respirators and Supplied-Air Hoods Reference is made to your correspondence of June 12, 1978, forwarding the subject IE Bulletin.
Identified therein was a discussion of recent reports which indicate that the actual protection afforded by certain demand-mode-operated, air-line, supplied-air respirators and supplied-air hoods is less than that specified in the current NRC guidance.
In response to the action items delineated in the subject Bulletin, the following information is provided.
Item:
"1. If your respiratory protection program includes the use of air-line supplied-air respirators operated in the demand mode (not respirators operated in continuous-flow or pressure-demand modes) or supplied-air hoods, describe the actions you plan to take to assure proper protec tion of personnel in consideration of the information provided by this Bulletin."
Response*
No air-line supplied-air respirators operated in the demand mode are utilized in the respiratory protection program at San Onofre.
Either of two separate systems are used to minimize exposure to airborne contamination.
-2 The first system utilizes a manifold fed from the service air compressors to supply NIOSH-MESA approved supplied air hoods. This system has a calibrated pressure gauge installed in the manifold to verify that the proper air flow is maintained. Station procedures require that pressure be maintained at a level sufficient to provide a minimum flow of 6 CFM.
The second system uses a battery operated air blower to force air---
through a series of filters before it reaches the hood. 3M models W-267 and W-255 are utilized. These models are individual "package" units which have been. designed and approved by NIOSH-MESA to deliver a minimum of 6 CFM. Since these units are not manifolded from a common air source which might be used by varying numbers of individuals, no pressure gauges or flow measuring equipment is deemed necessary.
The maximun protection factor specified in station procedures for either of the above systems is 1000, as recommended in the subject Bulletin.
Item:
"2. If your respiratory protection program includes the use of air-line supplied-air respirators operated in the demand mode (not respirators operated in continuous-flow or pressure-demand modes), determine the manufacturer, model and number of half-mask and full facepiece equip ment used in this mode."
Response
No equipment of this type is in use or planned for use in the respiratory protection program at San Onofre.
Should you have any further questions, please contact me.
Sincerely, cc:
Director, Division of Fuel Facilities and Materials Safety Inspection USNRC, Office of Inspection & Enforcement