Details:

Personal Author:
Ahlers, Heinz ; Ann, Roland Berry ; Stein, Robert R.
Ahlers, Heinz ; Ann, Roland Berry ; Stein, Robert R. Less -
Corporate Authors:
National Personal Protective Technology Laboratory ; National Institute for Occupational Safety and Health ; United States, Mine Safety and Health Administration.
National Personal Protective Technology Laboratory ; National Institute for Occupational Safety and Health ; United States, Mine Safety and Health Administration. Less -
Description:
"This report describes a National Institute for Occupational Safety and Health (NIOSH) and Mine Safety and Health Administration (MSHA) investigation assessing the prevalence of a lack of sufficient start-up oxygen in CSE SR-100 self-contained self-rescuer (SCSR) devices. The availability of sufficient start-up oxygen is critical to the performance of the SR-100. As part of a routine field testing program of SCSRs used in coal mines, NIOSH and MSHA detected two SR-100s that lacked sufficient start-up oxygen. CSE Corporation subsequently discovered one SCSR that lacked sufficient start-up oxygen in that company's internal quality control program and voluntarily stopped further production and sales of SR-100s. NIOSH developed a protocol to test for the presence of start-up oxygen in field-deployed SR100s. The purpose of the test was to determine if the failure rate of the start-up oxygen in the population of 70,000 field-deployed units exceeded 1%. NIOSH and MSHA used American Society for Quality (ASQ), Sampling Procedures and Tables for Inspection of Isolated Lots by Attributes (ASQC Q3-1988). In assessing the SR-100s, if no more than 3 failures of start-up oxygen occurred in the 500-unit random sample, the SR-100 could be accepted as meeting the Limiting Quality (LQ) rate of 1.25% for start-up oxygen performance. NIOSH tested five hundred field-deployed devices collected from coal mines throughout the United States. NIOSH observed 5 start-up oxygen failures in the 500 units it tested. The maximum number of failures allowed under the LQ rate of 1.25% was exceeded; therefore, the 1% maximum allowable failure rate under the protocol was not met." - NIOSHTIC-2
Content Notes:
Robert Stein, Heinz Ahlers, Roland Berry Ann.
Subject:
[+]
Self-contained Self-rescuer (Mine Rescue Equipment)
Testing
Self-contained self-rescuer (Mine rescue equipment)/Testing

Series:
DHHS publication ; no. (NIOSH) 2012-139
Document Type:
Pamphlet (or booklet)
Collection(s):
Stephen B. Thacker CDC Library collection
Main Document Checksum:
[+]
urn:sha256:cd809c70ddf42a880f1b9eb53ed6ea21fc819b151cf768b153b6f0189b933e1e
File Type:

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