CALCULATION-EXPERIMENTAL INVESTIGATIONS OF RADIATION LOADING PARAMETERS ON THE REACTOR PRESSURE VESSEL AND REACTOR SUPPORT STRUCTURES OF VVER-1000 IN ACTUAL REACTOR CONDITION

The paper deals with the analysis of revealed regularities neutron fields distributions outside the reactor core (on reactor pressure vessel and reactor support structures) VVER-1000, and also developed a new method of preparing the neutron source model or the neutron transport calculation, based on the actual distributions of the power fields received in the in-core reactor control system. This method is implemented in fast neutron fluence calculation procedure on VVER-1000 reactor pressure vessel.
Paper also present recently obtained experimental data at NPPs with VVER-1000, which used to testify the developed methods and allow to receive detailed distribution of the radiation loading parameters of the reactor pressure vessel and reactor support structures of VVER-1000, and also can be used for validation of calculation methods or for other areas of study of neutron fields parameters inside and outside reactor core of the VVER-1000 reactors.