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The programme on core melt quenching and the potential for steam explosion is based on the FARO and KROTOS facilities. The FARO facility, in which a mixture of UO(2), zirconia and zircaloy is melted and then delivered under gravity to water pool to investigate melt quenching phenomena including hydrogen and steam generation rate, can use large masses of molten corium (up to 150 kg) at full-scale water depth (up to 2 m) at high pressure and temperature (up to 10 MPa and 300 C). In support to the large-scale FARO tests, the KROTOS facility is used to investigate the premixing of molten fuel melt jets in saturated subcooled water and to study the energetics of triggered or spontaneous steam explosions. A series of corium melt/water experiments is in progress and analytical modelling is being developed and validated in collaboration with USNRC (at the University of Wisconsin) and with ENEL. The JRC is planning to diversify the use of FARO to studies of ex-vessel phenomena such as ex-vessel steam explosions and melt spreading.

Additional information

Authors: JONES A V, JRC Ispra (IT)
Bibliographic Reference: Paper presented: 9th meeting of the Task Group on Fission Product Phenomena in the Containment (FPC), Paris (FR), March 20, 1995
Availability: Available from (1) as Paper EN 38927 ORA
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