ML19256B450
| ML19256B450 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 06/22/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| References | |
| NUDOCS 7907110208 | |
| Download: ML19256B450 (1) | |
Text
'o UNITED STATES M
8 \\*.f f /,'g NUCLEAR REGULATORY COMMISSION
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2 REGION V o, i.
f 1990 N. CAllFORNI A BOULEVARD
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SUITE 202, WALNUT CREE K PLAZA
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WALNUT CREEK, CALIFORNIA 94596 June 22, 1979 Docket No. 50-312 Sacramento Municipal Utility District P. O. Box 15830 Sacramento, California 95813 Attention:
Mr. John J. Mattimoe Assistant General Manager Gentlemen:
The enclosed IE Circular No. 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 enclos;re to the circular.
Sincernly, lL c' { i,.
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R. H. Engelken Director
Enclosure:
IE Circular No. 79-09 cc w/encls:
R. J. Rodriguez, SMUD L. G. Schwieger, SMUD 835 177 no2o7
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UNITED STATES NUCLEAR REGULATORY C0f411SSION OFFICE OF INSPECTION AND ENFORCEMENT WASHIf!GTON, D.C.
20555 June 22, 1979 IE Circular No. 79-09 OCCURRENCES OF SPLIT OR PUNCTURED REGULATOR DIAPHRAGMS IN CERTAIN SELF-CONTAIflED BREATHING APPARATUS Description of Circumstances:
The Nuclear Regulatory Comission (NRC) has been informed by mailgram (copy enclosed) from the National Institute of Occupational Safety and Health (flIOSH) of the high rate of regu'ater diaphragm failures in the Scott Air Pak II/ IIA ar ' 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 units by the NIOSH field survey.
Tests of the Scott apparatus by flIOSH showed reduced respiratory protection in the Demand-Mode and a loss of service time (but no loss of protection) in the Pressure Demand-f! ode.
flotice 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 mailgran; or 2.
Incorporate the provisions of the flIOSH mailgram into your current progran 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 enclosed mailgram.
Enclosure:
f1AILGRAM 83.5 178
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DUPLICATE DOCUMENT Entire document previously entered into system under:
anO P oto190237 No. of pages:
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