Abstract
In this research, when the hydrothermal behavior at the time of LOCA in PWRs is forecast with high accuracy by the optimal forecast code based on a two-fluid model, there are some problems in the accuracy of forecast of low velocity two-phase flow, therefore, the subjects related to it were studied. The subjects are the forecast using the multi-dimensional optimal forecast code of the heat transfer acceleration phenomena in high power output fuel assemblies originating in the radial power distribution in a core in the reflooding period at the time of LOCA, the evaluation of the applicability of the hydrothermal model in a core in reflooding period which was developed for 15 x 15 type fuel assemblies to 17 x 17 type fuel assemblies, the grasping of the mechanism of opposite flow limiting phenomena in hot leg, the elucidation of the scale effect of channels and the development of a model which is applicable up to actual reactor scale. The studies carried out on these subjects and the conclusions of respective studies are reported. (K.I.) 79 refs.
Ohnuki, Akira
[1]
- Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment
Citation Formats
Ohnuki, Akira.
Study of two-phase flow under low velocity in PWR-LOCA.
Japan: N. p.,
1992.
Web.
Ohnuki, Akira.
Study of two-phase flow under low velocity in PWR-LOCA.
Japan.
Ohnuki, Akira.
1992.
"Study of two-phase flow under low velocity in PWR-LOCA."
Japan.
@misc{etde_10112643,
title = {Study of two-phase flow under low velocity in PWR-LOCA}
author = {Ohnuki, Akira}
abstractNote = {In this research, when the hydrothermal behavior at the time of LOCA in PWRs is forecast with high accuracy by the optimal forecast code based on a two-fluid model, there are some problems in the accuracy of forecast of low velocity two-phase flow, therefore, the subjects related to it were studied. The subjects are the forecast using the multi-dimensional optimal forecast code of the heat transfer acceleration phenomena in high power output fuel assemblies originating in the radial power distribution in a core in the reflooding period at the time of LOCA, the evaluation of the applicability of the hydrothermal model in a core in reflooding period which was developed for 15 x 15 type fuel assemblies to 17 x 17 type fuel assemblies, the grasping of the mechanism of opposite flow limiting phenomena in hot leg, the elucidation of the scale effect of channels and the development of a model which is applicable up to actual reactor scale. The studies carried out on these subjects and the conclusions of respective studies are reported. (K.I.) 79 refs.}
place = {Japan}
year = {1992}
month = {Oct}
}
title = {Study of two-phase flow under low velocity in PWR-LOCA}
author = {Ohnuki, Akira}
abstractNote = {In this research, when the hydrothermal behavior at the time of LOCA in PWRs is forecast with high accuracy by the optimal forecast code based on a two-fluid model, there are some problems in the accuracy of forecast of low velocity two-phase flow, therefore, the subjects related to it were studied. The subjects are the forecast using the multi-dimensional optimal forecast code of the heat transfer acceleration phenomena in high power output fuel assemblies originating in the radial power distribution in a core in the reflooding period at the time of LOCA, the evaluation of the applicability of the hydrothermal model in a core in reflooding period which was developed for 15 x 15 type fuel assemblies to 17 x 17 type fuel assemblies, the grasping of the mechanism of opposite flow limiting phenomena in hot leg, the elucidation of the scale effect of channels and the development of a model which is applicable up to actual reactor scale. The studies carried out on these subjects and the conclusions of respective studies are reported. (K.I.) 79 refs.}
place = {Japan}
year = {1992}
month = {Oct}
}