Code for Calculating Temperature Fields in RBMK KLADKA-2

The article describes the fuel element temperature calculation module implemented in the KLADKA-2 code, designed to calculate stationary and nonstationary temperature fields in structural elements of the RBMK reactor. The calculations of the heating dynamics of the drained reactor and its subsequent cooling (with the restoration of cooling of the channels of the control and protection system circuit) are compared with the calculations using the STEPAN-T code. It is shown that the results of calculations of fuel and graphite temperatures obtained using the two computer codes are in satisfactory agreement.