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NASA-LLIS-0108
Lessons Learned - Gaseous Helium Injection During Slow LOX Fill
Year: 1992
Abstract: Description of Driving Event:
The helium injection system introduces a controlled flow of helium into the aft end of the feedline to prevent geysers during propellant loading and holds before launch. The helium is supplied from panel S72-0697-08 through one series valve (A78410) and two parallel valves. Failure of the series valve or clogging of the downstream filter could cause loss of bubbling. Loss of helium bubbling prior to 2% full or after 98% full in the external tank (ET) could result in damage due to geysering.
The helium injection system introduces a controlled flow of helium into the aft end of the feedline to prevent geysers during propellant loading and holds before launch. The helium is supplied from panel S72-0697-08 through one series valve (A78410) and two parallel valves. Failure of the series valve or clogging of the downstream filter could cause loss of bubbling. Loss of helium bubbling prior to 2% full or after 98% full in the external tank (ET) could result in damage due to geysering.
Subject: Ground Equipment
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T18:29:35Z | |
| date available | 2017-09-04T18:29:35Z | |
| date copyright | 08/20/1992 | |
| date issued | 1992 | |
| identifier other | ITYCQCAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;query=autho1216AF679D/handle/yse/211821 | |
| description abstract | Description of Driving Event: The helium injection system introduces a controlled flow of helium into the aft end of the feedline to prevent geysers during propellant loading and holds before launch. The helium is supplied from panel S72-0697-08 through one series valve (A78410) and two parallel valves. Failure of the series valve or clogging of the downstream filter could cause loss of bubbling. Loss of helium bubbling prior to 2% full or after 98% full in the external tank (ET) could result in damage due to geysering. | |
| language | English | |
| title | NASA-LLIS-0108 | num |
| title | Lessons Learned - Gaseous Helium Injection During Slow LOX Fill | en |
| type | standard | |
| page | 2 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1992 | |
| contenttype | fulltext | |
| subject keywords | Ground Equipment | |
| subject keywords | Ground Operations | |
| subject keywords | Launch Process | |
| subject keywords | Launch Vehicle |