NASA-LLIS-0108

Lessons Learned - Gaseous Helium Injection During Slow LOX Fill

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