NDLI: Hydrazine monitoring in spacecraft

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Hydrazine monitoring in spacecraft

Content Provider	NASA Technical Reports Server (NTRS)
Author	Limero, T. F. Beck, S. W. Cross, J. H. James, J. T.
Copyright Year	1992
Description	Hydrazine (HZ) and monomethyl hydrazine (MMH) are highly toxic compounds used as fuels in the Space Shuttle Orbiter Main Engines and in its maneuvering and reaction control system. Satellite refueling during a mission may also result in release of hydrazines. During extravehicular activities, the potential exists for hydrazines to contaminate the suit and to be brought into the internal atmosphere inadvertantly. Because of the high toxicity of hydrazines, a very sensitive, reliable, interference-free, and real-time method of measurement is required. A portable ion mobility spectrometer (IMS) has exhibited a low ppb detection limit for hydrazines suggesting a promising technology for the detection of hydrazines in spacecraft air. The Hydrazine Monitor is a modified airborne vapor monitor (AVM) with a custom-built datalogger. This off-the-shelf IMS was developed for the detection of chemical warfare agents on the battlefield. After early evaluations of the AVM for hydrazine measurements showed a serious interference from ammonia, the AVM was modified to measure HZ and MMH in the ppb concentration range without interference from ammonia in the low ppm range. A description of the Hydrazine Monitor and how it functions is presented.
File Size	498575
Page Count	10
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19920013113
Archival Resource Key	ark:/13960/t56f0rs8s
Language	English
Publisher Date	1992-02-01
Access Restriction	Open
Subject Keyword	Aerospace Medicine Hydrazines Liquid Rocket Propellants Vapors Methylhydrazine Space Shuttle Orbiters Real Time Operation Toxicity and Safety Hazard Ammonia Ion Mobility Spectroscopy Spacecraft Contamination Spectrometers Ion Motion Monitors Portable Equipment Gas Spectroscopy Gas Detectors Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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