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Abstract

The paper compares and discusses the results of two large-scale FARO quenching tests known as L-11 and L-14, which involved, respectively, 151 kg of w% 76.7 UO(2) + 19.2 ZrO(2) + 4.1 Zr and 125 kg of w% 80 UO(2) + 20 ZrO(2) melts poured into 600 kg, 2 m depth water at saturation at 5.0 MPa. The results are further compared with those of two previous tests performed using a pure oxidic melt, respectively 18 and 44 kg of w% 80 UO(2) + 20 ZrO(2) melt quenched in 1 m depth water at saturation at 5.0 MPa. In all the tests, significant breakup and quenching took place during the melt fall through the water. No steam explosion occurred. In the tests performed with a pure oxide UO(2)-ZrO(2) melt, part of the corium did not breakup and reached the bottom plate still molten whatever the water depth. Test L-11 suggest that full oxidation and complete breakup of the melt occured during the melt fall through the water. A proportion of 64 % of the total energy content of the melt was released to the water during this phase, against 44 % for L-14.

Additional information

Authors: MAGALLON D, JRC Ispra (IT);HOHMANN H, JRC Ispra (IT)
Bibliographic Reference: Paper presented: Conference, Saratoga (US), September 1995
Availability: Available from (1) as Paper EN 39262 ORA
Record Number: 199511470 / Last updated on: 1995-11-03
Category: PUBLICATION
Original language: en
Available languages: en