Improvement of Computer Code for Calculation of Decay Heat in Spent Fuel Pool

Bazen za istrošeno gorivo je prostor predviđen za mokro skladištenje nuklearnog goriva koje je provelo neko vrijeme u nuklearnom reaktoru i doseglo određeni stupanj odgora. SFPFA jednostavan je program, pisan u jeziku fortran90, koji ima mogućnost proračuna ostatne topline, vremena boravka u bazenu i akumuliranog odgora istrošenog goriva. Programu su dodane funkcije točnijeg proračuna ostatne topline, proračuna za proizvoljni vremenski trenutak ili niz vremenskih točaka, te mogućnost grupiranja gorivnih elemenata po kriteriju slične snage. Dobiveni podaci spremaju se u tekstualnu datoteku i pogodni su za daljnje proračune prema potrebi. Također, program ima mogućnost proračuna dvaju podataka, vremena do ključanja i vremena do otkrivanja goriva.Spent fuel pool is a space for wet storage of nuclear fuel that spent some time in the nuclear reactor and reached a certain degree of burnup. SFPFA is a simple program written in Fortran90 computer language. This program can calculate decay heat, time spent in SFP and accumulated burnup of spent nuclear fuel. The program has added functions of a more accurate calculation of decay heat, calculation for specific time moment or number of sequential time points and can group fuel elements according to the power criteria. The calculated data can be saved in format appropriate for further use in more detailed thermal hydraulic calculations. Also, the program can calculate two important information, time to boiling and time to fuel uncovery