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Fuel Oxidizer Reaction Products (FORP) Contamination of Service Module (SM) and Release of N-nitrosodimethylamine(NDMA)in a Humid Environment from Crew EVA Suits Contaminated with FORPThe Service Module (SM) is an element of the Russian Segment of the International Space Station (ISS). One of the functions of the SM is to provide attitude control for the ISS using thrusters when the U.S. Control Moment Gyros (CMG's) must be desaturated. Prior to an Extravehicular Activity (EVA) on the Russian Segment, the Docking Compartment (DC1) is depressurized, as it is used as an airlock. When the DC1 is depressurized, the CMG's margin of momentum is insufficient and the SM attitude control thrusters need to fire to desaturate the CMG's. SM roll thruster firings induce contamination onto adjacent surfaces with Fuel Oxidizer Reaction Products (FORP). FORP is composed of both volatile and non-volatile components. One of the components of FORP is the potent carcinogen N-nitrosdimethylamine (NDMA). Since the EVA crewmembers often enter the area surrounding the thrusters for tasks on the aft end of the SM and when translating to other areas of the Russian Segment, the presence of FORP is a concern. This paper will discuss FORP contamination of the SM surfaces, the release of NDMA in a humid environment from crew EVA suits, if they happen to be contaminated with FORP, and the toxicological risk associated with the NDMA release.
Document ID
20050217293
Acquisition Source
Johnson Space Center
Document Type
Preprint (Draft being sent to journal)
Authors
Schmidl, William (Boeing Aerospace Co. United States)
Mikatarian, Ron (Boeing Aerospace Co. United States)
Lam, Chiu-Wing (Wyle Labs., Inc. United States)
West, Bil (Hamilton Sundstrand Corp. United States)
Buchanan, Vanessa (Honeywell, Inc. United States)
Dee, Louis (Honeywell, Inc. United States)
Baker, David (NASA White Sands Test Facility NM, United States)
Koontz, Steve (NASA Johnson Space Center Houston, TX, United States)
Date Acquired
September 7, 2013
Publication Date
April 2, 2004
Subject Category
Space Transportation And Safety
Meeting Information
Meeting: 7th International Space Conference on Protection of Materials and Structures from Space Enviroment
Location: Toronto
Country: Canada
Start Date: May 10, 2004
End Date: May 13, 2004
Funding Number(s)
CONTRACT_GRANT: NAS15-10000
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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