SOME ASPECTS OF THE BEHAVIOR OF FISSION PRODUCTS IN MOLTEN FLUORIDE REACTOR FUELS

Technical Report · Fri Jan 17 04:00:00 EST 1958

DOI:https://doi.org/10.2172/4242546· OSTI ID:4242546

Robinson, M. T.; Wright, H. W.; Handley, T. H.

0bservations are reported on the behavior of several fission product elements in molten NaF- ZrF/sub 4/-UF/sub 4/ fuels, irradiated in capsule experiments, forcedconvection in-pile loop experiments, and in the Aircraft Reactor Experiment (ARE). The rare gases have been observed to escape readily from the fuels in dynamic tests, although in static tests the rate of escape is very low. Rutbenium and niobium deposit on the Iaconel walls of the fuel container. probably as metals. Other fission products studied (Sr, Zr, La,,Ce) appear to remain in the fuel. The results obtain are entirely consistent with theoretical productions. It is suggested that the observed noble metal deposit map serve to reduce corrosion of methls by molten floride fuels. The unsatisfactory nature of Cs/sup 137/ as a fission monitor in such fuels is reported. and the use of Zr/sup 95/ substitute is discussed. (auth) l6536 In order to evaluate the irradiation stability of the APPR-1 type Fe-B cored, stainless steel clad control rod configuration, a test program consisting of the irradiation of both minature absorber plates and an APPR-1 type full size control rod was initiated. The purpose of these irradiations was to determine toe dimensional stability and structural integrity of this type of absorber material throughout a relatively wide range of B burnups. Results obtained from the post- irradiational examination are summarized. (W.L.H.))

• Research Organization: Oak Ridge National Lab., Tenn.
• DOE Contract Number: W-7405-ENG-26
• NSA Number: NSA-13-016535
• OSTI ID: 4242546
• Report Number(s): CF-58-1-36
• Country of Publication: United States
• Language: English

Related Subjects

AIRCRAFT
ALUMINUM ALLOYS
CAPSULES
CERIUM
CESIUM 137
CHROMIUM ALLOYS
CORROSION
DEPOSITS
FISSION PRODUCTS
FUEL CANS
FUELS
IN PILE LOOPS
INCONEL ALLOYS
LANTHANUM
MELTING
MONITORING
NICKEL ALLOYS
NIOBIUM
NIOBIUM ALLOYS
RADIATION EFFECTS
RADIATION EFFECTS ON MATERIALS
RARE GASES
REACTORS
RUTHENIUM
SODIUM FLUORIDES
STRONTIUM
TESTING
TITANIUM ALLOYS
URANIUM FLUORIDES
ZIRCONIUM
ZIRCONIUM 95
ZIRCONIUM FLUORIDES