JRR-1燃料溶液の化学分析

抄録

In July 1960, the Analytical Chemistry Laboratory participated in the first of what has been called the "comprephensive test" of JRR-1 (1957-1969), in order to solve a number of problems essential to the operation of the reactor. The state of corrosion of the core tank wall, the behavior of the gas recombiner water, and the state of the fuel solution were examined.
Following the above test, the second and the third tests were carried out the November, 1967 and in January, 1970.
The change in volume of the fuel solution was determined by measurements of the density and the uranium concentration, and the cause of this volume change was clarified. The corrosion products and metals added to the fuel solution, i.e., iron, nickel, chromium and copper were determined. In the second and third tests, all of the above items, as well as sulfuric acid concentration, plutonium production and burnup were measured. All the results were compared with the values obtained at the first startup of the reactor. In the third test, a considerable amount of aluminum was found in the gas recombiner water. This element must have originated in the catalyst used in the recombiner. From the burnup determined by mass spectrometry, the cumulative power output was estimated to be nearly 22×10⁴kWh.