Long-term thermo-hydraulic analysis in large-scale sodium-water reaction (Analysis of SWAT-3 Runs 4, 5, 6 and 7 by SWAC-13E); Large-scale sodium-water reaction analysis (Report No.14)

*; *; Kuroha, Mitsuo; *; *; *; *

PNC TN941 85-53, 144 Pages, 1985/03

PNC-TN941-85-53.pdf:3.01MB

SWAC13E is a one-dimensional thermo-hydraulic computer program to analyze large scale sodium-water reaction accidents in an LMFBR steam generator. The code is the advanced version of SWAC13, the long-term hydraulic analysis module of SWACS; the energy conservation is taken into consideration in the new version to add the function to analyze the temperature behavior of the reaction. The present document covers the validation study of the code by using the large leak data of the Steam Generator Safety Test Facility (SWAT-3). The analytical parameters are as follows: (1)Model of relative velocity. (2)Void/droplet density. (3)The number of nodes where water leaks. (4)Reaction heat. It is concluded that the code can analyze the phenomena with a reasonable conservatism by choosing the proper value of the parameters.