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.

Interpretation of Local FluxMeasurements in Subcritical Systemsand Reactivity Determination / Dulla, Sandra; Ravetto, Piero. - In: SCIENCE AND TECHNOLOGY OF NUCLEAR INSTALLATIONS. - ISSN 1687-6075. - 2012:629039(2012). [10.1155/2012/629039]

Interpretation of Local FluxMeasurements in Subcritical Systemsand Reactivity Determination

DULLA, SANDRA;RAVETTO, PIERO
2012

Abstract

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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2496969
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