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NASA Exploration Toilet Hardware Technical Challenges and Accomplishments The Universal Waste Management System (UWMS), ISS operational nomenclature “Toilet” was initially installed on the International Space Station (ISS) in 2020 with final installation completed in 2021. Technical progress continues to be made with each On-Orbit operation and will ultimately culminate with nominal US crew use of the hardware on ISS. During 2024, another attempt was made to perform the Artemis-2 Demonstration on ISS with a re-flight of the Dosing Assembly using original components. This paper discusses issues encountered when the Dosing Assembly failed to dispense pretreat as well as a subsequent failure to start of UWMS and On-Orbit troubleshooting resulting in removal and return of the controller. A summary of ground troubleshooting of the controller which is the Orion “common controller” as well as planned repairs is discussed. An updated design of the commode seat and fecal bag for Artemis-2 UWMS was demonstrated on ISS and a summary of the hardware, results and selection of seat for use on Artemis-2 is included in the paper. Details of air flow of each option of the updated seat, original seat along with permutations for original UWMS Fecal Bag, Updated Fecal Bag and current WHC ACY Insert (Russian design Fecal Bag) are described as well as crew feedback on the evaluation. Implications for all work on Orion missions will be detailed.
Document ID
20250004005
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Melissa K McKinley
(Johnson Space Center Houston, Texas, United States)
Melissa A Borrego
(Johnson Space Center Houston, Texas, United States)
Lyudmyla Ochs
(Goddard Space Flight Center Greenbelt, United States)
John Bescup
(Jet Propulsion Laboratory La Cañada Flintridge, United States)
Steve McClure
(Jet Propulsion Laboratory La Cañada Flintridge, United States)
Chris Iannello
(Kennedy Space Center Merritt Island, Florida, United States)
Melanie Arden
(Collins Aerospace (United States) Charlotte, United States)
Jeff Darmetko
(Hamilton Sundstrand Space Systems International Windsor Locks, Connecticut, United States)
Harold Hansen
(Hamilton Sundstrand Space Systems International Windsor Locks, Connecticut, United States)
Jonathan Kocher
(Collins Aerospace (United States) Charlotte, United States)
Cheryl Kokosz
(Collins Aerospace (United States) Charlotte, United States)
Kevin Litton
(Collins Aerospace (United States) Charlotte, United States)
Neal St Martin
(Collins Aerospace (United States) Charlotte, United States)
Date Acquired
April 21, 2025
Subject Category
Man/System Technology and Life Support
Report/Patent Number
ICES-2025-094
Meeting Information
Meeting: 54th International Conference on Environmental Systems (ICES)
Location: Prague
Country: CZ
Start Date: July 13, 2025
End Date: July 17, 2025
Sponsors: ILC Dover (United States), Collins Aerospace (United States), Honeywell (Canada), Amentum, Paragon Space Development Corporation (United States)
Funding Number(s)
CONTRACT_GRANT: 80MSFC18C0011
WBS: 251546.05.72
Distribution Limits
Public
Copyright
Public Use Permitted.
Technical Review
External Peer Committee
Keywords
ELCSS
Habitation
Crew systems
Toilet
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