Abstract
This work aimed to evaluate the effects of two different heat fluxes (20 W/cm2 and 80 W/cm2) on fuel crud deposition behavior and sub-cooled nucleate boiling (SNB) behavior in simulated primary water of a pressurized water reactor at 13 MPa. The SNB behavior on the fuel cladding tubes was periodically monitored using an acoustic emission (AE) technique during the deposition tests. The number of boiling AE signals emitted on the fuel cladding tubes at 80 W/cm2 was greater than that at 20 W/cm2 throughout the deposition test. After the crud deposition tests, the amount of crud formed on the cladding tubes at 80 W/cm2 increased by about 3.6-times compared with that at 20 W/cm2. In this paper, the effect of heat flux on fuel crud deposition is discussed from the viewpoint of the degree of SNB.
Published Version
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