Influence of geometrical parameters of the VVER-1000 reactor construction elements to internals irradiation conditions

Abstract

Investigations to determine the influences of geometrical parameters of the calculational VVER-1000 reactor model to the results of internal irradiation condition determination are carried out. It is shown that the values of appropriate sensitivity matrix elements are not dependent on a height coordinate for any core level, but there is their azimuthal dependence. Maximum possible relative biases of neutron fluence due to inexact knowledge of internal geometrical parameters are obtained for the baffle and the barrel.

Keywords

• VVER-1000 reactor
• internals
• fluence
• irradiation conditions
• sensitivity matrix