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Trace Contaminant Control for the International Space Station's Node 1- Analysis, Design, and VerificationTrace chemical contaminant generation inside crewed spacecraft cabins is a technical and medical problem that must be continuously evaluated. Although passive control through materials selection and active control by adsorption and catalytic oxidation devices is employed during normal operations of a spacecraft, contaminant buildup can still become a problem. Buildup is particularly troublesome during the stages between the final closure of a spacecraft during ground processing and the time that a crewmember enters for the first time during the mission. Typically, the elapsed time between preflight closure and first entry on orbit for spacecraft such as Spacelab modules was 30 days. During that time, the active contamination control systems are not activated and contaminants can potentially build up to levels which exceed the spacecraft maximum allowable concentrations (SMACs) specified by NASA toxicology experts. To prevent excessively high contamination levels at crew entry, the Spacelab active contamination control system was operated for 53 hours just before launch.
Document ID
20170005170
Acquisition Source
Marshall Space Flight Center
Document Type
Technical Publication (TP)
Authors
Perry, J. L. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
June 5, 2017
Publication Date
April 1, 2017
Subject Category
Space Transportation And Safety
Numerical Analysis
Report/Patent Number
NASA/TP-2017-218235
Report Number: NASA/TP-2017-218235
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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