Respirator studies for the DOE Division of Operational and Environmental Safety. Progress report, October 1, 1976--September 30, 1977

Measurements were made of the inhalation flow rates, exhalation resistance pressures, and weights of Mining Enforcement and Safety Administration-National Institute for Occupational Safety and Health (MESA-NIOSH)-approved open-circuit self-contained breathing apparatus (SCBA). Test results are given and differences among the devices are compared. These SCBAs were also used in an experimental physiology program at the United States Air Force School of Aerospace Medicine, and a brief description of the physiology program is given. The subjective comfort of SCBA harnesses was studied, and a literature review was performed on the physiological effects of respirator use. Test procedures for supplied-air suits were improved, and tests for removal adequacy and escape time were added. A Department of Energy (DOE) contractor's 15-min escape device was tested for DOE acceptance. A study was performed on the aerosol penetration into two-piece, supplied-air suits for seven configurations and six supply airflow rates. Results are given and compared, and recommendations on suit use are given. A literature review was performed on the heat stress caused by wearing a supplied-air suit.