The experimental measurements of the temperature in IGR reactor masonry are
analyzed, and it is shown that because of the radiation heating of the the
rmocouples, it is impossible to measure the temperature at the moment of a
run and because of the time constant of the measuring system, it is impossi
ble to measure the temperature during a period of 1 min after a run. The th
ree-dimensional code TEMPO was developed to calculate the temperature field
of the reactor masonry. It is shown that the code predicts the temperature
field to within 10%, which is adequate for the present stager of the work.
Computational results for the temperature field of the masonry are present
ed.