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Abstract

A comprehensive experimental and analytical research program dedicated to the assessment of melt-coolant interaction and quenching phenomenologies relevant to the progression of severe accidents in water cooled reactors is being carried out at the Ispra site of the European Commission Joint Research Centre. The primary objective of the research program is aimed at the acquisition of a reference experimental data base from tests performed in the FARO large scale experimental installation with realistic melt composition and under reactor-typical accident conditions. The experimental program is complemented by an extensive analytical activity based on the development and assessment of COMETA, a coupled thermal-hydraulic and melt fragmentation code conceived for the computational analysis of melt-coolant interaction processes. This paper correlates the COMETA post-test predicted results for a series of melt quenching tests performed in the FARO test facility with system pressure as main parametric variation. The reference test series comprises FARO test L-14, L-20 and L-24 performed at a system pressure of 50, 20 and 5 bars, respectively. The predictive capabilities of COMETA and the effect of system pressure on the major parameters characterizing the overall interaction process are appraised through a comparative analysis of predicted and measured quantities.

Additional information

Authors: ADDABBO C, JRC Ispra (IT);ANNUNZIATO A, JRC Ispra (IT);SILVERII R, JRC Ispra (IT);MAGALLON D, JRC Ispra (IT)
Bibliographic Reference: Paper presented: 6th International Conference on Nuclear Engineering, San Diego (US), 10-15 May 1998
Availability: Available from (1) as Paper EN 41361 ORA
Record Number: 199810700 / Last updated on: 1998-06-08
Category: PUBLICATION
Original language: en
Available languages: en