Loss of flow transient heat transfer tests of a full sized LMFBR blanket model

1982 
A series of loss-of-flow transient heat transfer tests was performed using a full sized 61-rod, electrically heated LMFBR blanket assembly model. The objective of these tests was to obtain data which can be used to validate and calibrate existing transient subchannel analysis codes. The tests were performed by first establishing steady state conditions (power input, flow, temperatures) and then decreasing power input and sodium flow at preprogrammed rates. The test series included tests with heat input to all rods, and to four rows (26 rods) only. The transients simulated both undercooling and overcooling events. Time history data were obtained for power and flow along with the response of approximately 300 thermocouples. Plots were prepared of the variation with time of power input, sodium flow rate, normalized power-to-flow ratio and selected temperature responses. Cross plots are presented of temperature profile changes with time.
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