Hybrid-transport point kinetics for initially-critical multiplying systems.

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Bibliographic Details
Title: Hybrid-transport point kinetics for initially-critical multiplying systems.
Authors: Picca, Paolo1 ppicca@gmail.com, Furfaro, Roberto1 robertof@email.arizona.edu
Source: Progress in Nuclear Energy. Sep2014, Vol. 76, p232-243. 12p.
Subjects: Multiplying circuits, Model theory, Electric transients, Neutron diffusion, Mathematical models, Computer simulation
Abstract: The paper presents an extension of the Hybrid Transport Point Kinetic (HTPK) model to initially-critical multiplying structures, i.e. in a source-free medium with transients starting from the equilibrium between neutron distribution and precursor concentrations. The mathematical model behind the HTPK methodology is derived from the detailed time-dependent balance equations and with reference to the limiting cases (i.e., point model and multi-collision models). Numerical simulations of transient systems demonstrate the interesting features of HTPK, which is shown to sensibly increase the accuracy of classical point kinetics models even at low truncation orders. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:The paper presents an extension of the Hybrid Transport Point Kinetic (HTPK) model to initially-critical multiplying structures, i.e. in a source-free medium with transients starting from the equilibrium between neutron distribution and precursor concentrations. The mathematical model behind the HTPK methodology is derived from the detailed time-dependent balance equations and with reference to the limiting cases (i.e., point model and multi-collision models). Numerical simulations of transient systems demonstrate the interesting features of HTPK, which is shown to sensibly increase the accuracy of classical point kinetics models even at low truncation orders. [ABSTRACT FROM AUTHOR]
ISSN:01491970
DOI:10.1016/j.pnucene.2014.05.013