Comparison of different surface quantitative analysis methods: Application to corium

Guilbaud, Nathalie; Blin, Delphine; Pe´rodeaud, Phllippe; Dugne, Olivier; Gue´neau, Christine
July 2000
AIP Conference Proceedings;2000, Vol. 532 Issue 1, p336
Academic Journal
In the case of a severe hypothetical accident in a pressurized water reactor, the reactor assembly melts partially or completely. The formed material, named “corium,” flows out and spreads at the bottom of the reactor. In order to limit and control the consequences of such an accident, it is necessary to know precisely the specifications of the O-U-Zr basic system. These specifications should lead to the understanding of physico-chemical phenomenon happening at very high temperatures, from the study at room temperature of solidified structures. Toward that goal, a corium mix was processed by a melting by electron bombing at very high temperature (3000 K), followed by a quenching of the ingot in an Isabell[1] evaporator, Metallographical analyses were then necessary in order to validate thermodynamic databases set by the Thermo-Calc software.[2,3] The study consists of setting a global quantitative analysis method of the surface that would be fast and reliable, in order to determine a global composition of corium. © 2000 American Institute of Physics.


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