ML19254A701
| ML19254A701 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 06/23/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Groce R VERMONT YANKEE NUCLEAR POWER CORP. |
| References | |
| NUDOCS 7907240208 | |
| Download: ML19254A701 (1) | |
Text
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UNITED STATES Mi@m
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(j NUCLEAR REGULATORY COMMISSION i ~ ~' /
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631 PARK AVENUE
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Docket No. 50-271
- 'J h,,.. a, Vermont Yankee Nuclear Power Corporation ATTN
Mr. Robert H. Groce Licensing Engineer 20 Turnpike Road Westborough, Massachusetts 01581 Gentlemen:
The enclosed Circular 79-09, is f7rwarded to you for information.
If there are any questions related to your understanding of the suggested actions, please notify the contact listed in the attachment to the circular.
Sincerely, L
Boyce H. Grier Director
Enclosures:
1.
IE Circular No. 79-09 2.
List of IE Circulars Issued in 1979 cc w/encls:
W. F. Conway, Plant Superintendent Ms. J. Abbey, Technical Secretary A. Z. Roisman,' Natural Resources Defense Council i 907240268'
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:
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 respi n tory 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.
Attachment:
MAILGRAM DUPLICATE DOCUMENT Entire document previously entered into system under:
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of pages:
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