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NASA-LLIS-0034
Lessons Learned - Cryogenic Loading/Draining of the Main Propulsion System (MPS)
Year: 1992
Abstract: Description of Driving Event:
The main propulsion system's (MPS) LH2 system operations include the transfer of LH2 from the pad storage tank to the orbiter and pressurization of the external tank during drain operations. A leak/ fire during cryogenic loading or draining operations may result in loss of vehicle and/or life. This risk remains active until shuttle liftoff from the fixed service structure, for a flight readiness firing, or for a countdown demonstration test. LH2 leaks may occur via structure/component failure, purge loss due to flow restriction (clogs, regulator/valve fails closed), or flow diversion (relief valve fails open, flexhose ruptures).
The main propulsion system's (MPS) LH2 system operations include the transfer of LH2 from the pad storage tank to the orbiter and pressurization of the external tank during drain operations. A leak/ fire during cryogenic loading or draining operations may result in loss of vehicle and/or life. This risk remains active until shuttle liftoff from the fixed service structure, for a flight readiness firing, or for a countdown demonstration test. LH2 leaks may occur via structure/component failure, purge loss due to flow restriction (clogs, regulator/valve fails closed), or flow diversion (relief valve fails open, flexhose ruptures).
Subject: Cryogenic Systems
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T16:17:52Z | |
| date available | 2017-09-04T16:17:52Z | |
| date copyright | 09/17/1992 | |
| date issued | 1992 | |
| identifier other | TDYCQCAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/81302 | |
| description abstract | Description of Driving Event: The main propulsion system's (MPS) LH2 system operations include the transfer of LH2 from the pad storage tank to the orbiter and pressurization of the external tank during drain operations. A leak/ fire during cryogenic loading or draining operations may result in loss of vehicle and/or life. This risk remains active until shuttle liftoff from the fixed service structure, for a flight readiness firing, or for a countdown demonstration test. LH2 leaks may occur via structure/component failure, purge loss due to flow restriction (clogs, regulator/valve fails closed), or flow diversion (relief valve fails open, flexhose ruptures). | |
| language | English | |
| title | NASA-LLIS-0034 | num |
| title | Lessons Learned - Cryogenic Loading/Draining of the Main Propulsion System (MPS) | en |
| type | standard | |
| page | 2 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1992 | |
| contenttype | fulltext | |
| subject keywords | Cryogenic Systems | |
| subject keywords | Energetic Materials - Explosive/Propellant/Pyrotechnic | |
| subject keywords | Facilities | |
| subject keywords | Flight Equipment | |
| subject keywords | Ground Equipment | |
| subject keywords | Ground Operations | |
| subject keywords | Hardware | |
| subject keywords | Hazardous/Toxic Waste/Materials | |
| subject keywords | Launch Process | |
| subject keywords | Launch Vehicle | |
| subject keywords | Parts Materials & Processes | |
| subject keywords | Pressure Vessels |