Interpretation of Local Flux Measurements in Subcritical Systems and Reactivity Determination

• Main Authors: S. Dulla, P. Ravetto
• Format: Article
• Language: English
• Published: Hindawi Limited 2012-01-01
• Series: Science and Technology of Nuclear Installations
• Online Access: http://dx.doi.org/10.1155/2012/629039

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.