1991-07-01

Water Quality Program Elements for Space Station Freedom 911400

Space Station Freedom (SSF) will be operational for up to 30 years with missions lasting up to 180 days. Because of the need for large amounts of potable and hygiene water for the crews, it will not be practical to supply water from the ground (as was done for Skylab) or to generate water from fuel cells (as is done for the Shuttle). Hence, waste and metabolic waters will be reclaimed and recycled in SSF. Because of the unique nature of the water sources and the closed loop recycling processes, providing safe water will be a challenging task. Developing a program for the verification of SSF water quality to ensure crew health is the responsibility of NASA's Medical Sciences Division at the Johnson Space Center (JSC). This program is being implemented through the Environmental Health System (EHS). This paper will describe the strategy for the development of water quality criteria and standards, and the associated monitoring requirements. The paper will also describe the selected monitoring strategy for both in-flight and ground-based analyses of water quality, and the in-flight monitoring equipment being developed.

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