ML19224C254
| ML19224C254 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 06/22/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Millen C PUBLIC SERVICE CO. OF COLORADO |
| References | |
| NUDOCS 7907020015 | |
| Download: ML19224C254 (1) | |
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June 22, 1979 Docket No.
50-267 Public Service Company of Colorado ATTN: Ifr. C. K. Millen Sealor Vice President P. O. Box 840 Denver, Colorado 80201 Centlemett:
The enclosed IE Circular 79-09, is forwarded to you for information.
If there are any questions related to your understanding of the suggested actions, please notify the contact listed in the enclosure to the circular.
Sincerely,
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Karl V. Seyfri Director
Enclosures:
1.
1E Circular 1o, 79-09 2.
List of IE Circulars Issued in Last 12 Months cc:
D. W. Warembourg, I;uclear Iroduction Manager Fort St. Vrain Nuclear Station P. O. Box 36S Platteville, Colcrado 80651 L. Brey, Manager, Quality Assurance l(3 f 7, [; G s/ I,
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UNITED STATES NUCLEAR REGULATORY COSDlISSION OFFICE OF INSPECTION AND ENFORCEt1ENT WASHINGTON, D.C.
20555 IE Circular No. 79-09 Date:
June 22, 1979 Page 1 of 1 OCCURRENCES OF SPLIT OR PUNCTURED REGULATOR DIAPERAGBIS IN CERTAIN SELF-CONTAINED BREATHING APPARATUS Description of Ci.cumstances:
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 about 10 percent of the i nits by the NIOSl! field survey.
Tests of the Scott apparatus by NIOSH showed reduced respiratory protection in the Demand-flode and a loss of service time (but no loss 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 enclosed 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 subje u, please contact the individual specified in the enclosed mailgram.
Enclosure:
Mailgram 266 EO DUPLICATE DOCUMENT
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