Cryogenic explosion environment modeling and testing of space shuttle and light-weight radioisotope heater unit interactions

Technical Report · Tue Oct 01 00:00:00 EDT 1985

DOI:https://doi.org/10.2172/6265268· OSTI ID:6265268

Johnson, E W

In order to assess the risk to the world's populace in the event of a Space Shuttle accident when radioisotope-containing heat sources are on board, testing of that system must be performed to determine release point, environments required, and the size distribution of the released fuel. To evaluate the performance of the Light-Weight Radioisotope Heater Unit (LWRHU) (101 of these 1-W items are placed on the Galileo spacecraft which will be launched from the Space Shuttle), some high-velocity impact and flyer plate testing was carried out. The results showed that a bare urania-fueled LWRHU clad (approximately 1-mm thick platinum-30 wt % rhodium alloy) will withstand 1100 m/s flyer plate (3.5-mm thick aluminum) impacts and 330 m/s impacts upon the Space Shuttle floor (approximately 12-mm thick aluminum) without rupture or fuel release. Velocities in the order of 600 m/s on a steel surface will cause clad failure with fuel release. The fuel breakup patterns were characterized as to quantity in a specific size range. These data were employed in the formal Safety Analysis Report for the LWRHU to support the planned 1986 Galileo launch. 19 figs.

• Research Organization: Mound Plant (MOUND), Miamisburg, OH (United States)
• DOE Contract Number: AC04-76DP00053
• OSTI ID: 6265268
• Report Number(s): MLM-3303; ON: DE86005901
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPES AND RADIATION SOURCES
42 ENGINEERING
RADIOISOTOPE HEAT SOURCES
PERFORMANCE TESTING
RISK ASSESSMENT
SPACE SHUTTLES
CRYOGENICS
EXPLOSIONS
HEALTH HAZARDS
SPACE TRANSPORT
AIRCRAFT
HAZARDS
HEAT SOURCES
SPACE VEHICLES
TESTING
TRANSPORT
VEHICLES
NESDPS Office of Nuclear Energy Space and Defense Power Systems
070300* - Isotopic Power Supplies
420600 - Engineering- Safety Engineering- (-1987)