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As part of the International Space Station (ISS) Trace Contaminant Control Subassembly (TCCS) development, a performance test has been conducted to provide reference data for flight verification analyses. This test, which used the U.S. Habitation Module (U.S. Hab) TCCS as the test article, was designed to add to the existing database on TCCS performance. Included in this database are results obtained during ISS development testing; testing of functionally similar TCCS prototype units; and bench scale testing of activated charcoal, oxidation catalyst, and granular lithium hydroxide (LiOH). The present database has served as the basis for the development and validation of a computerized TCCS process simulation model. This model serves as the primary means for verifying the ISS TCCS performance. In order to mitigate risk associated with this verification approach, the U.S.

A filter assembly which is incorporated into the Russian Trace Contaminant Control Assembly was tested for removal of airborne trace chemical contaminants in a closed loop 9 m3 system. Given contaminant loading rates and maximum allowable atmospheric concentrations, the Russian system was able to maintain system air concentrations below maximum allowable limits. This was achieved for both a new filter system and for a system where a part of it was pre-loaded to emulate 3 years of system age.

The warm extrusion process is described as adapted to making Ti-3A 1-2.5V tube hollows to be reduced for high-quality aircraft hydraulic tubing. The advantages of this process over conventional hot extrusion appear to be sufficient to warrant further studies aimed at improved uniformity. Alloy segregation is noted in the forged extrusion billets which can be eliminated by heat treatment. It is presumed that this segregation is related to problems encountered in fabrication to tubing and has an effect on the variability of properties in the final tubing. An approach to the problem is suggested.