NASA-LLIS-6436

Lessons Learned - Pressure Testing and Venting of Enclosed Volumes

contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T16:35:13Z
date available	2017-09-04T16:35:13Z
date copyright	05/22/2012
date issued	2012
identifier other	UZJNXEAAAAAAAAAA.pdf
identifier uri	https://yse.yabesh.ir/std/handle/yse/98693
description abstract	As part of the International Space Station (ISS) Heat Rejection System (HRS) radiator face sheet failure investigation team, review of the radiator panel design indicated that the radiator panel acted as an enclosed, un-vented volume. Subsequent testing confirmed this assumption and other investigation data suggested the volume beneath the face sheet was fed, over time, by an internal leak of either nitrogen or ammonia. Pressure build-up continued and the separation of the face sheet from the underlying honeycomb structure grew due to the formation of football-shaped volumes, or "lagoons", in the honeycomb structure. After, either, reaching a critical pressure level or triggered by a micrometeoroid/orbital debris (MMOD)-induced pressure wave, the face sheet failed.
language	English
title	NASA-LLIS-6436	num
title	Lessons Learned - Pressure Testing and Venting of Enclosed Volumes	en
type	standard
page	3
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;2012
contenttype	fulltext