ML20136A954

From kanterella
Jump to navigation Jump to search
Forwards IE Circular 79-09, Occurrences of Split or Punctured Regulator Diaphragms in Certain Self-Contained Breathing Apparatus. No Action Required
ML20136A954
Person / Time
Site: Three Mile Island  Constellation icon.png
Issue date: 06/23/1979
From: Grier B
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To: Herbein J
METROPOLITAN EDISON CO.
References
NUDOCS 7907240154
Download: ML20136A954 (1)


Text

- .- - - . . .

j pn aag, e o UNITED STATES

, [E 3

y, I ,,g NUCLEAR REGULATORY COMMISSION REGION i 04 @1

  • Os  :: [E 631 PARK AVENUE

t, ,o# KING OF PRUSSIA, PENNSYLVANIA 19406 Docket Nos. 50-289 50-320 Metropolitan Edison Company ATTN: Mr. J. G. Herbein Vice President P. O. Box 542 Reading, Pennsylvania 19640 Gentlemen:

The enclosed 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 contacc listed in the attachment to the circular.

Sincerely, l

w 3 /-

/ Boyce H. Grier~ k @ht -

___. l Director

Enclosures:

1. IE Circular No. 79-09
2. List of IE Circulars Issued in 1979 cc w/encls:

E. G. Wallace, Licensing Manager J. J. Barton, Project Manager L. L. Lawyer, Manager - Generation Operations G. P. Miller, Manager - Generating Station - Nuclear J. L. Seelinger, Unit 1 Superintendent W. E. Potts, Unit 1 Superintendent - Technical Support J. B. Logan, Unit 2 Superintendent i i

G. A. Kunder, Unit 2 Superintendent - Technical Support I. R. Finfrock, Jr.

Mr. R. Conrad G. F. Trowbridge, Esquire Miss Mary V. Southard, Chairman, Citizens for a Safe Environment I

7907240/ Q $ ',

ENCLOSURE 1 UNITED STATES' NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D. C. 20555 IE Circular No. 79-09 Date: June 22, 1979 Page 1 of 1 OCCURRENCES 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 (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 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. j l

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 attached 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 attached mailgram.

1

Attachment:

MAILGRAM l

7 906290237 G QalSzo

- . _ -.