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Journal Articles

Effect of porosity distribution on two-phase pressure drop in a packed bed

Kurisaki, Tatsuya*; Ito, Daisuke*; Ito, Kei*; Saito, Yasushi*; Imaizumi, Yuya; Matsuba, Kenichi; Kamiyama, Kenji

Proceedings of 11th Korea-Japan Symposium on Nuclear Thermal Hydraulics and Safety (NTHAS-11) (Internet), 3 Pages, 2018/11

In the evaluation of the in-place cooling which is for the residual core materials in the severe accident of sodium-cooled fast reactors, pressure loss of two-phase flow in debris bed is one of the important factors. Although Lipinski model is already proposed for the pressure loss evaluation, the accuracy would decrease when the porosity is not homogeneous. Thus, experiment to measure the pressure loss in a packed bed of non-homogeneous porosity distribution was conducted, and the Lipinski model was modified dividing the cross section to evaluate the pressure loss in it. As a result, it was confirmed that agreement of the experimental values with the values by modified Lipinski model was better than that with the original Lipinski model.

Oral presentation

Study on coolant behavior in damaged core of sodium-cooled fast reactor, 3; Measurement of air-water two phase pressure drop in a simulated debris bed

Kurisaki, Tatsuya*; Ito, Daisuke*; Ito, Kei*; Saito, Yasushi*; Aoyagi, Mitsuhiro; Matsuba, Kenichi; Kamiyama, Kenji

no journal, , 

no abstracts in English

Oral presentation

Study on coolant behavior in damaged core of sodium-cooled fast reactor, 4; Evaluation of pressure drop through simulated debris bed in consideration of porosity distribution

Kurisaki, Tatsuya*; Ito, Daisuke*; Ito, Kei*; Saito, Yasushi*; Imaizumi, Yuya; Matsuba, Kenichi; Kamiyama, Kenji

no journal, , 

The pressure loss of two-phase flow in debris bed is one of the important factor for coolability evaluation of the inplace-cooling for the residual core-materials in the severe accident of sodium-cooled fast reactors. Although Lipinski model is already proposed for the pressure loss evaluation, the accuracy would decrease when the porosity is not homogeneous. Thus, the evaluation method by dividing the cross section was developed for the two-phase flow in packed bed of non-homogenious porosity, and compared the calculated values with experimental data for the validation.

Oral presentation

Characteristics of two-phase pressure drop in a simulated debris bed

Ito, Daisuke*; Kurisaki, Tatsuya*; Ito, Kei*; Saito, Yasushi*; Aoyagi, Mitsuhiro; Matsuba, Kenichi; Kamiyama, Kenji

no journal, , 

In order to evaluate characteristics of debris-bed coolability in the core region, characteristics of the pressure loss in the debris-bed under liquid-gas two phase flow is required to be understood. In this study, effects of porosity distribution on pressure loss and void-fraction distribution in the test section are presented.

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