Heat transfer coefficients of steam condensation on containment vessel wall during blowdown

Abstract

Heat transfer coefficients of steam condensation on the containment vessel wall at a LOCA are studied. As to the steady state heat transfer coefficients, though Sagawa’s data are a little smaller than Uchida’s data, they are very close to the analytical solutions by Mori-Hijikata. Transient heat transfer coefficients are represented by the steady state heat transfer coefficients multiplied by a factor. The factor expresses the agitation effect weakening with time during blowdown. Values of parameters in the factor are determined so as the heat transfer coefficients to fit Sagawa’s data. These heat transfer coefficients are applied to the analyses of the experiment with the simulation apparatus of an integrated type marine water reactor. Values of the parameters are also determined so that the temperature transients on the containment vessel wall by analyses fit them of experiment. The differences of the values of parameters by the analyses and by Sagawa’s data are discussed. © 1981 Taylor & Francis Group, LLC.