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NASA-LLIS-0605
Lessons Learned – LOX Barge Pumping Operations; Retaining Screw and Wear Ring
Year: 1998
Abstract: Description of Driving Event:
During LOX transfer operations in preparation for a Space Shuttle Main Engine (SSME) test (904- 362) on the B-1 test stand, a LOX pump (barge #1, pump B) over pressurized, initiating a fire on barge #1. The fire was extinguished and mishap investigation procedures were initiated. The primary cause (determined by the board) was the backing out of a retaining screw during LOX pump B operations. Further investigation highlighted the following:
1. SSC's procurement (post 1988) of pump casings with configurations that were not per design (beveled area around retaining screw area), and
2. Wear rings for the pump are re-used after pump rebuild if no evidence impeller to wear ring wear exists.
The incident caused no injuries; however, damage to equipment including the barge, motors, lines, and decking is estimated at approximately $250,000. In addition, the pending SSME test was cancelled and rescheduled.
During LOX transfer operations in preparation for a Space Shuttle Main Engine (SSME) test (904- 362) on the B-1 test stand, a LOX pump (barge #1, pump B) over pressurized, initiating a fire on barge #1. The fire was extinguished and mishap investigation procedures were initiated. The primary cause (determined by the board) was the backing out of a retaining screw during LOX pump B operations. Further investigation highlighted the following:
1. SSC's procurement (post 1988) of pump casings with configurations that were not per design (beveled area around retaining screw area), and
2. Wear rings for the pump are re-used after pump rebuild if no evidence impeller to wear ring wear exists.
The incident caused no injuries; however, damage to equipment including the barge, motors, lines, and decking is estimated at approximately $250,000. In addition, the pending SSME test was cancelled and rescheduled.
Subject: Energetic Materials - Explosive/Propellant/Pyrotechnic
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T17:44:25Z | |
| date available | 2017-09-04T17:44:25Z | |
| date copyright | 36115 | |
| date issued | 1998 | |
| identifier other | EGCEQCAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std/handle/yse/167461 | |
| description abstract | Description of Driving Event: During LOX transfer operations in preparation for a Space Shuttle Main Engine (SSME) test (904- 362) on the B-1 test stand, a LOX pump (barge #1, pump B) over pressurized, initiating a fire on barge #1. The fire was extinguished and mishap investigation procedures were initiated. The primary cause (determined by the board) was the backing out of a retaining screw during LOX pump B operations. Further investigation highlighted the following: 1. SSC's procurement (post 1988) of pump casings with configurations that were not per design (beveled area around retaining screw area), and 2. Wear rings for the pump are re-used after pump rebuild if no evidence impeller to wear ring wear exists. The incident caused no injuries; however, damage to equipment including the barge, motors, lines, and decking is estimated at approximately $250,000. In addition, the pending SSME test was cancelled and rescheduled. | |
| language | English | |
| title | NASA-LLIS-0605 | num |
| title | Lessons Learned – LOX Barge Pumping Operations; Retaining Screw and Wear Ring | en |
| type | standard | |
| page | 3 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1998 | |
| contenttype | fulltext | |
| subject keywords | Energetic Materials - Explosive/Propellant/Pyrotechnic | |
| subject keywords | Facilities | |
| subject keywords | Ground Operations | |
| subject keywords | Hardware | |
| subject keywords | Parts Materials & Processes |