[1I14-18] Fuel & FP Behavior in Accident

[1I15] A study on the chemical reaction between fuel materials and graphite block

(2)Differential scanning calorimetry of the uranium dioxide and graphite

*Hiroyuki Naito¹, Masaya Yamamoto¹, Shigetaka maeda¹, Shigeru Kurematsu², Isamu Sato³, Koji Maeda¹ (1. JAEA, 2. NDC, 3. Tokyo City Univ.)

Keywords:Fast reactor, Nuclear fuel, Graphite, Uranium dioxide

Differential scanning calorimetry was used to study the chemical reaction between the uranium dioxide pellet and the graphite block. The result showed that there was no reaction between the uranium dioxide pellet and the graphite block in the maximum temperature 1,200 deg C and the maximum oxygen concentration 10ppm. Therefore we consider that the graphite blocks wouldn't be thinned if they could contact with the fuel materials in the safety vessel of the experimental fast reactor JOYO.