High-temperature heat-capacity measurements on (U, Gd)O2 by drop calorimetry and DSC
1993; Elsevier BV; Volume: 201; Linguagem: Inglês
10.1016/0022-3115(93)90164-t
ISSN1873-4820
AutoresYoichi Takahashi, Masami Asou,
Tópico(s)Nuclear reactor physics and engineering
ResumoHeat capacities of U1−xGdxO2 (x ≤ 0.142) were determined from 400 to 1000 K by drop calorimetry, and also from 400 to 1500 K by differential scanning calorimetry (DSC). The reliability of the heat-capacity measurements by the two methods was confirmed by the measurements on UO2, the results being consistent with the published values within experimental uncertainty over the temperature range of the measurements. In the heat capacities of U1−xGdxO2(x ≤ 0.142), no thermal anomalies were observed. Their heat-capacity values were by 2–3% lower than those of UO2, and no significant dependence on Gd content was found.
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