ML19254A684
| ML19254A684 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 06/23/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Groce R Maine Yankee |
| References | |
| NUDOCS 7907240166 | |
| Download: ML19254A684 (1) | |
Text
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Docket No. 50-309 JUN 2 3 mg Maine Yankee Atomic Power Company ATTN:
Mr. Robert H. Grace Licensing Engineer 20 Turnpike Road Westborough, Massachusetts 01581
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'emen:
The enclosed Circular 79-09, is forwarded to you for information.
If there are any que.,tions related to your understanding of the suggested actions, please notify the contact listed in the attachment to the circular.
Sincerely, e x stfe#M.
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Boyce H. Grier Director
Enclosures:
1.
IE Circular No. 79-09 2.
List of IE Circulars Issued in 1979 cc w/encls:
E. Wood, Plant Superintendent E. W. Thurlow, President 4
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ENCLOSURE 1 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D. C. 20555 IE Circular No. 79-09 Date:
June 22, 1979 Page 1 of 1 OCCURRENCES OF SPLIT OR PUNCTURED REGULATOR DIAPHRAGMS IN CERTAIN SELF-CONTAINED BP.EATHING APPARATUS Jescription of Circumstances:
The Nuclear Regulatory Commission (NRC) has been informed by mailgram (copy enclosed) from the National Institute of Occupational Safety and Health (NIOSH) of the high rate of regulator diaphragm failures in the Scott Air Pak II/ IIA and Presur-Pak II/ IIA self-contained breathing apparatus.
The failures, ranging from pin holes in the diaphragm to complete diaphragm rupture, have been identified in abou; 10 percent of the units by the NIOSH field survey. Tests of the Scott apparatus by NIOSH showed reduced respiratory protection in the Demand-Mode and a loss of service time (but nt oss of protection) in the Pressure Demand-Mode.
Notice to Licensees:
Many major licensees use the types of Scott apparatus described above.
Users of the devices should take the following action:
1.
Establish a program for examination of the described respiratory devices in accordance with the attached NIOSH mailgram; or 2.
Incorporate the provisions of the NIOSH mailgram into your current program for inspection of the described devices.
No written response to this Circular is required.
If you require additional information regarding this subject, please contact the individual specified in the attached mailgram.
Attachment:
MAILGRAM DUPLICATE DOCUMENT Entire document previously entered into system under:
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