Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5428690 | Journal of Quantitative Spectroscopy and Radiative Transfer | 2013 | 9 Pages |
Within the evaluation of the heat transfer downstream a quench front during the reflood phase of a Loss of Coolant Accident (LOCA) in a nuclear power plant, a numerical study has been conducted on radiative transfer through a vapor-droplet medium. The non-grey behavior of the medium is obvious since it can be optically thin or thick depending on the wavelength. A six wide bands model has been tested, providing a satisfactory accuracy for the description of the radiative properties. Once the radiative properties of the medium computed, they have been introduced in a model solving the radiative heat transfer based on the Improved Differential Approximation. The fluxes and the flux divergence have been computed on a geometry characteristic of the reactor core showing that radiative transfer plays a relevant role, quite as important as convective heat transfer.
⺠Radiation during a Loss of Coolant Accident in a nuclear reactor is studied. ⺠Radiative transfer is involved in a high temperature vapor-droplet mixing. ⺠RTE is solved in a 3D configuration using an IDA-T4 method. ⺠Flux and flux divergence are computed in various situations. ⺠The effects of quadrature and spectral resolution are discussed.