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NASA-LLIS-3097
Lessons Learned - Impurities in Propellant-Grade Ammonia Can Lead to Corrosion and Poor Hardware Performance
Year: 2010
Abstract: Abstract:
Leaks in the Space Shuttle ammonia boiler system, as well as a single instance of a boiler shutdown during postflight operation, led to a review of the materials and processes used in the ammonia boiler. Failure analysis was performed and concluded that the corrosion was caused by high levels of chloride in the procured ammonia and that the shutdown was due to high levels of polyethylene oxide (PEO) in the propellant-grade ammonia. Since the switch to higher-purity, technical-grade ammonia, there have been no ammonia boiler leaks or shutdowns.
Leaks in the Space Shuttle ammonia boiler system, as well as a single instance of a boiler shutdown during postflight operation, led to a review of the materials and processes used in the ammonia boiler. Failure analysis was performed and concluded that the corrosion was caused by high levels of chloride in the procured ammonia and that the shutdown was due to high levels of polyethylene oxide (PEO) in the propellant-grade ammonia. Since the switch to higher-purity, technical-grade ammonia, there have been no ammonia boiler leaks or shutdowns.
Subject: Engineering design and project processes and standards
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T17:53:00Z | |
| date available | 2017-09-04T17:53:00Z | |
| date copyright | 05/18/2010 | |
| date issued | 2010 | |
| identifier other | FDMGFDAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std/handle/yse/176219 | |
| description abstract | Abstract: Leaks in the Space Shuttle ammonia boiler system, as well as a single instance of a boiler shutdown during postflight operation, led to a review of the materials and processes used in the ammonia boiler. Failure analysis was performed and concluded that the corrosion was caused by high levels of chloride in the procured ammonia and that the shutdown was due to high levels of polyethylene oxide (PEO) in the propellant-grade ammonia. Since the switch to higher-purity, technical-grade ammonia, there have been no ammonia boiler leaks or shutdowns. | |
| language | English | |
| title | NASA-LLIS-3097 | num |
| title | Lessons Learned - Impurities in Propellant-Grade Ammonia Can Lead to Corrosion and Poor Hardware Performance | en |
| type | standard | |
| page | 1 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;2010 | |
| contenttype | fulltext | |
| subject keywords | Engineering design and project processes and standards | |
| subject keywords | Environmental Control and Life Support Systems | |
| subject keywords | Long term sustainability and maintenance planning |