ML19256B447
| ML19256B447 | |
| Person / Time | |
|---|---|
| Site: | Humboldt Bay |
| Issue date: | 06/22/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Crane P PACIFIC GAS & ELECTRIC CO. |
| References | |
| NUDOCS 7907110200 | |
| Download: ML19256B447 (1) | |
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UNITED STATES
}',g NUCLE AR REGULATORY COMMISSION yy,og/.c
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REGION V 3
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1000 N. CALIFORNI A BOULEVARD Q,
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WALNUT CHEE K, CALIFORNI A 94505 June 22, 1979 Docket tio. 50-133 Pacific Gas and Electric Company 77 Beale Street San Francisco, California 9410b Attention: Mr. Philip A. Crane, Jr.
Assistant General Counsel Gentlemen:
The enclosed IE Circular tio. 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 e'1 closure to the circular.
Sincerely,
,.--f-Is [ ( Q *.g.
E3.___
R. H. Engelken Director
Enclosure:
IE Circular t;o. 79-09 cc w/encls:
W. Barr, PG&E W. A. Raymond, PG&E E. Weeks, PG&E, Humboldt Bay 835 171 7907110 8 O'O
UNITED STATES flVCLEAR REGULATORY C0f 711SSION OFFICE OF IfiSPECTION AND ENFORCEMENT WASHIrlGTON, D.C.
20555 June 22, 1979 IE Circular t'o. 79-09 OCCURRENCES OF SPLIT OR PUNCTURED REGULATOR DIAPHRAGMS Ili CERTAIN SELF-CONTAltlED BREATHING APPARATUS Descr ption of Circunstances:
The Nuclear Regulatory Ccmission (NRC) has bcen informed by mailgram (copy enclosed) from the fiational Institute of Occupational Safety and Health (flIOSH) 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 units by the NIOSH field survey.
Tests of the 5cott apparatus by flIOSH showed reduce 3 respiratory protection in the Demand-Mode and a loss of service time (but no loss of protection) in the Pressure Demand-ftode, f!otice 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 progran for examination of the described respiratory devices in 3ccordance with the enclosed NIOSH railgran; or 2.
Incorporate the provisions of the NICSH nailgran into your current progran for inspection of the described devices.
fio written resoonse to tnis Circular is required.
If you require additional informatian regarding this subject, please contact the individual specified in the enclosed mailgram.
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Enclosure:
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