ML19224C253
| ML19224C253 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 06/22/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Short T OMAHA PUBLIC POWER DISTRICT |
| References | |
| NUDOCS 7907020014 | |
| Download: ML19224C253 (1) | |
Text
CEilTRAL FI PDR:HQ
/ p" a%'h UNITED ST ATES e
NUCLEAR REGULATORY COMMISSION 5 d'['< 3.f.,Ic [l IISIC Z
E REGION IV Y
G11 RY AN P8 AZ A ORIVE, StJITE 1000 S
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June 22, 1979 Docket. No.
50-285 Ortaha Public Power District ATTN:
T. E. Short, Assistant General Manager 1623 Harney Strcet Omaha, Nebraska 68102 Centlemen:
If The enclosed IE Circular 79-09, is forwarded to you for information.
teere 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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Vg7,h. Y bu } t Karl V. Seyffit' Director
Enclosures:
1.
IE Circular No. 79-09 2.
List of IE Circulats Issued in Last 12 Months cc:
R. L. Andrews, Manager U
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Fort Calhoun Station Post Office Box 98 d
E Fort Calhoun, Nebraska 6810Q
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UNITED STATES NUCLEAR REGULATORY C01211SSION OFFICE OF INSPECTION AND ENFORCER!E:IT WASHINGTON, D.C.
20555 IE Circular No. 79-09 Date: June 22, 1979 Page 1 of 1 OCCURRENCES OF SPLIT OR PUNCTURED RdGULATOR DIAPHRAGBIS IN CERTAIN SELF-CONTAINED BREATHING APPARATUS Description of Circumstances:
The Nuclear Regulatory Commission (NRC) has been informed by mailgram (copy enclosed) from the National Institute of Occupational Safety and IIcalth (NIOSH) of the hig ratc of regulator diaphragm failures in the Scott Air Pak II/ IIA and Presur-Pak II/ IIA self-contained breathing apparatus. The failures, ranging f rom pin holes in the diaphragm to complete diaphragm rupture, have been identifi.ed in about 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 no loss of protection) in the Pressure Demand-Mode.
Notice to Licensreu
'lany 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 tFe 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 rcsponse to this Circular is required.
If you require additional information regarding this subject, please contact the individual specifie(1 in the enclosed mailgram.
Enclosure:
Mailgram
- )c 0' 0 i
.) c v DUPLICATE DOCUMENT Entire document previously entered into eystem under:
ANO No. of pages:
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