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Record Details

Record 25 of 2736
Setting Spacecraft Maximum Allowable Concentrations for 1 hour or 24 hour contingency exposures to airborne chemicals
Author and Affiliation:
Garcia, Hector D.(NASA Lyndon B. Johnson Space Center, Houston, TX, United States)
Limero, Thomas F.(Krug Life Sciences, Inc., Houston, TX, United States)
James, John T.(NASA Johnson Space Center, Houston, TX, United States)
Abstract: Since the early years of the manned space program, NASA has developed and used exposure limits called Spacecraft Maximum Allowable Concentrations (SMACs) to help protect astronauts from airborne toxicants. Most of these SMACS are based on an exposure duration of 7 days, since this is the duration of a 'typical' mission. A set of 'contingency SMACs' is also being developed for scenarios involving brief (1-hour or 24- hour) exposures to relatively high levels of airborne toxicants from event-related 'contingency' releases of contaminants. The emergency nature of contingency exposures dictates the use of different criteria for setting exposure limits. The NASA JSC Toxicology Group recently began a program to document the rationales used to set new SMACs and plans to review the older, 7-day SMACs. In cooperation with the National Research Council's Committee on Toxicology, a standard procedure has been developed for researching, setting, and documenting SMAC values.
Publication Date: Jul 01, 1992
Document ID:
19930057567
(Acquired Dec 28, 1995)
Accession Number: 93A41564
Subject Category: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
Report/Patent Number: SAE PAPER 921410
Document Type: Preprint
Publication Information: 6 p.
Publisher Information: United States
Meeting Information: SAE, International Conference on Environmental Systems; 22nd; July 13-16, 1992; Seattle, WA; United States
Meeting Sponsor: SAE
Financial Sponsor: NASA; United States
Organization Source: NASA Johnson Space Center; Houston, TX, United States
Description: 6p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: INDOOR AIR POLLUTION; SPACECRAFT CABIN ATMOSPHERES; SPACECRAFT CONTAMINATION; TOXICITY AND SAFETY HAZARD; DROPS (LIQUIDS); LIFE SUPPORT SYSTEMS; PARTICULATES
Imprint And Other Notes: SAE, International Conference on Environmental Systems, 22nd, Seattle, WA, July 13-16, 1992
Availability Source: Other Sources
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