Patent Document ID: 9576689
Application ID: 13820294
Patent Flag: 1

Claim One:
1. A real core shape simulation fuel experiment method for acquiring experimental data by a simulation of a real reactor comprising: filing an experimental vessel with a coolant; arranging a simulation fuel rod so as to be covered with the coolant in the experimental vessel; heating the simulation fuel rod; measuring, as measurement data, critical heat flux, a surface temperature of a fuel rod, a mass velocity, and a temperature of the coolant, and outputting as output signals, the measurement data and a thermal equilibrium quality determined from the measurement data; and predicting critical heat flux for the simulation fuel rod, wherein the predicting the critical heat flux includes: storing the output signals as experimental data into a storage unit; reading the experimental data from the storage unit; plotting the experimental data so as to obtain a correlation plot distribution; loading a logistic function from the storage unit wherein the logistic function is Formula (1): q ″ = A 1 + exp ⁡ ( - K ⁡ ( ( 1 - x ) - C ) ) ( 1 ) where q″ is critical heat flux, x is the thermal equilibrium quality, and A, K, and C are coefficients; calculating the coefficients A, K, and C such that the correlation plot distribution Z is approximated by the logistic function; obtaining a critical heat flux correlation by inputting the coefficients A, K, and C to the logistic function and obtaining a curve of the critical heat flux correlation; comparing the curve of the critical heat flux correlation with the correlation plot distribution; outputting, as an output data, the critical heat flux correlation when the curve of the critical heat flux correlation and the correlation plot distribution are within a predetermined allowable range; displaying the output critical heat flux correlation on a display unit; wherein the thermal equilibrium quality x is expressed as x = h g - h Isat h fg ⁢ ⁢ h g : enthalpy ⁢ ⁢ of ⁢ ⁢ coolant ⁢ ⁢ J ⁢ / ⁢ kg ⁢ ⁢ h Isat : enthalpy ⁢ ⁢ of ⁢ ⁢ saturated ⁢ ⁢ water ⁢ ⁢ J ⁢ / ⁢ kg ⁢ ⁢ h fg : latent ⁢ ⁢ heat ⁢ ⁢ J ⁢ / ⁢ kg. ( 2 )