抄録
Experiments on reactor malfunction diagnosis were conducted with an out-of-pile water loop with effective use made of subassembly outlet thermocouples. On-line meas-urements were carried out on temperature fluctuation amplitude, as well as on the average temperature. Experimental results revealed that the temperature fluctuation amplitude depends on the difference between the temperatures at channel inlet and at the point of observation and that monitoring of the temperature fluctuations should serve well for detecting of flow reduction and/or local hot spot in the fuel assemblies. The tempera-ture fluctuation is also shown to serve effectively as indicator for measuring the transit time of fluid flow.
Preliminary estimations on the temperature fluctuation amplitude made for the LMFBR indicate that the fluctuation amplitude should serve amply for effectively detecting anomalies in the fast breeder fuel assembly.
