An Analytical Solution for the General Perturbed Diffusion Equation by an Integral Transform Technique

M. T. Vilhena (), B. E. J. Bodmann () and I. R. Heinen ()
Additional contact information
M. T. Vilhena: Universidade Federal do Rio Grande do Sul
B. E. J. Bodmann: Universidade Federal do Rio Grande do Sul
I. R. Heinen: Universidade Federal do Rio Grande do Sul

Chapter 34 in Integral Methods in Science and Engineering, Volume 2, 2010, pp 361-368 from Springer

Abstract: Abstract In the developments of nuclear energy, new reactor concepts are being proposed and explored, where innovative ideas need to be tested by means of simulations. Although the original neutron calculations start from a transport equation, many approaches reduce the calculation to diffusion equations, since the Boltzmann equation for neutron transport is still considered a challenge (see, for example, [Le05], [Se07], and the references therein). A detailed sequence, starting from a neutron transport equation (Boltzmann equation) until the reduction to a diffusion phenomenon using Fick’s hypothesis, is given, for instance, in [Se07]. Our principal concern here is an effective analytical method for the general perturbed neutron diffusion equation by an integral transform technique. To this end, we present a procedure that allows us to construct an analytical solution of the multi-group neutron diffusion equation in Cartesian geometry using well-established integral transform procedures [He05]. Once the general structure of the solution is determined, we may directly calculate the neutron flux (which is an analytical expression), and the only quantity which is determined numerically at the end of the calculation is criticality. In what follows we present the procedure, considering a generic multi-group calculation for an arbitrary number of energy intervals. Due to the fact that the geometric extension of the reactor core is typically very much larger in one dimension compared to the other two length scales, we may cast the calculation into a two-dimensional (2D) setting.

Keywords: Boltzmann Equation; Interface Condition; Reactor Core; Total Problem; Liouville Problem (search for similar items in EconPapers)
Date: 2010
References: Add references at CitEc
Citations:

There are no downloads for this item, see the EconPapers FAQ for hints about obtaining it.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-0-8176-4897-8_34

Ordering information: This item can be ordered from
http://www.springer.com/9780817648978

DOI: 10.1007/978-0-8176-4897-8_34

Access Statistics for this chapter

More chapters in Springer Books from Springer
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().