Fission product chemistry experiments at Sandia

The High Temperature Fission Product Program, an experimental and analytical effort to produce thermodynamic and reaction-rate data on fission product species during severe LWR accidents, is reviewed. The paper discusses: (1) a facility where non-radioactive isotopes of fission products react with steam, reactor materials, and hydrogen for periods of time from seconds to hours at temperatures up to 11000C; (2) the calibration of a laser Raman spectrometer for identifying chemical species at temperature; and (3) recent results of vapor phase studies with CsOH as well as CsI in a 304ss or Inconel 600 system with steam and hydrogen and, in the absence of steam and hydrogen, reactions of tellurium vapor with nickel, 304ss, Inconel 600, preoxidized 304ss, preoxidized Inconel 600 and silver, reaction of iodine vapor with silver, and reaction of CsOH with iodine and with HI and of CsI with Ag and with O2