Quarterly report on the strontium heat source development program, advanced systems and materials production division for July-September 1978.

Technical Report · Fri Dec 01 04:00:00 EST 1978

DOI:https://doi.org/10.2172/6536052· OSTI ID:6536052

Fullam, H. T.

Metallographic examination of the specimens from the 12,000-hr tests with /sup 90/SrF/sub 2/ was completed this quarter. The 12,000-hr Hastelloy C-276 specimens exhibited substantially greater attack than did the 6000-hr specimens. The 12,000-hr Haynes 25 and TZM specimens, however, showed no more attack than did the 6000-hr specimens. The 20,000-hr tests with /sup 90/SrF/sub 2/ have also been completed, and arrangements have been made to ship the capsules to Oak Ridge National Laboratory (ORNL) for examination. Hydrostatic pressure testing of the AISI-1018 steel prototype outer capsules was completed. The 0.4-in. wall capsule collapsed at 11,200 psi, while the 0.5-in. wall capsule collapsed at 15,900 psi. THe 0.6-in. wall capsule did not collapse at the maximum test pressure of 20,000 psi, but did exhibit slight ovality after testing. The capsules were subjected to a helium leak check and no leaks were detected. Additional evaluation and destructive examination of the capsules are now underway. The 5000-hr oxidation tests with Hastelloy S and Hastelloy C-4 were completed. At 600/sup 0/C oxidation of both alloys continued to adhere to parabolic rate relationships. At 700/sup 0/ and 800/sup 0/C, however, oxidation of the two alloys after 5000-hr exposure was less than predicted by the parabolic rate equations that fitted the shorter-term data. Testing of the tensile specimens from the 1000- and 2500-hr oxidation tests indicates that oxidation of the two alloys at 600/sup 0/ to 800/sup 0/C has no significant effect on their room-temperature tensile properties.

• Research Organization: Battelle Pacific Northwest Labs., Richland, WA (USA)
• DOE Contract Number: EY-76-C-06-1830
• OSTI ID: 6536052
• Report Number(s): PNL-1845-40
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPE AND RADIATION SOURCES
070201* -- Radiation Sources-- Design
Fabrication & Operation
ALKALINE EARTH ISOTOPES
ALKALINE EARTH METAL COMPOUNDS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CAPSULES
CONTAINERS
ENCAPSULATION
EVEN-EVEN NUCLEI
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HEAT SOURCES
INTERMEDIATE MASS NUCLEI
ISOTOPES
NESDPS Office of Nuclear Energy Space and Defense Power Systems
NUCLEI
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
RADIOISOTOPE HEAT SOURCES
RADIOISOTOPES
RESEARCH PROGRAMS
STRONTIUM 90
STRONTIUM COMPOUNDS
STRONTIUM FLUORIDES
STRONTIUM ISOTOPES
WASTES
YEARS LIVING RADIOISOTOPES