Interpretation of Local Flux Measurements in Subcritical Systems and Reactivity Determination

الملخص EN

The determination of the subcriticality level constitutes an important issue in the assessment of the accelerator-driven system technology.

For this purpose, the interpretation of flux measurements requires a lumped-parameter model employed in an inverse fashion.

This papers addresses the drawbacks of point kinetics in performing such a task.

In particular, the problem of the generation of integral parameters is considered, in connection with the use of a shape function and of a projection weight tailored to the neutron flux detector.

Furthermore, the question of the generation of the effective source is analysed, and some proposals to modify the time dependence of such a function to account for the time delay at the flux detector are presented and discussed.