Characteristics of pool burning in small-scale sodium leakage

Futagami, Satoshi  ; Ohno, Shuji  ; Nishimura, Masahiro 

Sodium combustion tests were performed in order to investigate sodium pool expand behavior, floor liner temperature and floor liner corrosion mechanism under the condition of small-scale sodium leakage in air atmosphere of sodium cooled fast reactors. In 6 cases of the tests, sodium leak rate, leak height and humidity were changed as the parameter. This report describes the plan, result and knowledge of these tests. The test results are shown as follows; The maximum temperature of the floor liner depends on leak rate. The final growth area is mostly proportional to the rate of sodium leakage. Although a sodium pool grows up in proportion [almost] to time in early stages of leakage, the growth stops during the leakage due to the balancing of sodium supply and consumption in the pool. The measured value of floor liner corrosion thickness, chemical analysis of deposit and material analysis result showed that the dominant corrosion mechanism was relatively slow