General-Purpose Heat Source development: Extended series test program large fragment tests

Technical Report · Tue Aug 01 04:00:00 EDT 1989

DOI:https://doi.org/10.2172/5857636· OSTI ID:5857636

Cull, T A

General-Purpose Heat Source radioisotope thermoelectric generators (GPHS-RTGs) will provide electric power for the NASA Galileo and European Space Agency Ulysses missions. Each GPHS-RTG comprises two major components: GPHS modules, which provide thermal energy, and a thermoelectric converter, which converts the thermal energy into electric power. Each of the 18 GPHS modules in a GPHS-RTG contains four /sup 238/PuO/sub 2/-fueled capsules. LANL conducted a series of safety verification tests on the GPHS-RTG before the scheduled May 1986 launch of the Galileo spacecraft to assess the ability of the GPHS modules to contain the plutonia in potential accident environments. As a result of the Challenger 51-L accident in January 1986, NASA postponed the launch of Galileo; the launch vehicle was reconfigured and the spacecraft trajectory was modified. These actions prompted NASA to reevaluate potential mission accidents, and an extended series safety test program was initiated. The program included a series of large fragment tests that simulated the collision of solid rocket booster (SRB) fragments, generated in an SRB motor case rupture or resulting from a range safety officer SRB destruct action, with the GPHS-RTG. The tests indicated that fueled clads, inside a converter, will not breach or release fuel after a square (142 cm on a side) SRB fragment impacts flat-on at velocities up to 212 m/s, and that only the leading fueled capsules breach and release fuel after the square SRB fragment impacts the modules, inside the converter, edge-on at 95 m/s. 8 refs., 32 figs., 7 tabs.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5857636
• Report Number(s): LA-11597-MS; ON: DE89014000
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPE AND RADIATION SOURCES
070300* -- Isotopic Power Supplies
ACCIDENTS
ACTINIDE COMPOUNDS
CHALCOGENIDES
DIRECT ENERGY CONVERTERS
ELECTRONIC EQUIPMENT
EQUIPMENT
HEAT SOURCES
IMPACT TESTS
MATERIALS TESTING
MECHANICAL TESTS
NASA
NATIONAL ORGANIZATIONS
NESDPS Office of Nuclear Energy Space and Defense Power Systems
OXIDES
OXYGEN COMPOUNDS
PLUTONIUM COMPOUNDS
PLUTONIUM DIOXIDE
PLUTONIUM OXIDES
POWER SUPPLIES
RADIOISOTOPE HEAT SOURCES
REENTRY
SPACECRAFT POWER SUPPLIES
TESTING
THERMOELECTRIC GENERATORS
TRANSURANIUM COMPOUNDS
US ORGANIZATIONS