ML19256B458
| ML19256B458 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 06/22/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Parris H TENNESSEE VALLEY AUTHORITY |
| References | |
| NUDOCS 7907110230 | |
| Download: ML19256B458 (1) | |
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pa alouq'o UNITED ST ATES l' g y, gf[,g NUCLEAR REGULATORY COMMISSION REGION ll o h,*4. ' C# f 101 M ARIE TT A ST., N.W., SUIT E 3100 r
AT L AN; A. GE ORGI A 30303 e
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In Reply Refer To:
RII:JPO 50-259, 50-260 50-296 Tennessee Valley Authority Attn:
H. C. Parris Manager of Power 500A Chestnut Street Tower II
. Chattanooga, Tennessee 37401 Centlemen:
If there The enclosed Circular 79-09, is forwarded to you for information.
are any questions related to your understanding of the suggested actions, please notify the contact listed in the enclosure to the circular.
Sincerely, h Ja:es P. O' Reil L
Director
Enclosures:
1.
IE Circular No. 79-09 2.
Listing of IE Circulars Issued in Last Tvcive Months 836 203 0
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7907110 2 M
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e JUN 2 21979
. Tennessee Valley Authority cc w/ encl:
J. E. Gilleland Assistant Manager of Power 500C Chestnut Street Tower II Chattanooga, Tennessee 37401 J. G. Dewease Plant Superintendent Post Office Box 2000 Decatur, Alabama 35602 J. F. Cox 400 Commerce Street W10C131 C Knoxville, Tennessee 37902 D. E. McCloud Project Engineer 400 Chestnut Street Tower II Chattanooga, Tennessee 37401 i
836 204
4 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 June 22, 1979 IE Circular No. 79-09 OCCUPRENCES OF SPLIT OR PUNCTURED REGULATOR DIAPHRAGMS IN CERTAIN SELF-CONTAINED BREATHING APPARATUS Description of Circumstances:
The Nuclear Regulatory Commission (NRC) has been informed by mailgram (ccpy enclosed) from the National Institutt. of Occupational Safety and Health (NIOSH) of the high rate of regulator diaphragm failures in the Scott Air Pak II/ IIA nnd 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 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 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 subject, please contact the individual specified in the enclosed mailgram.
Enclosure:
8 }.h h_ U Mailgram
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