A New Formulation of the Reconstruction Problem in Neutronics Nodal Methods Based on Maximum Entropy Principle노달방법의 중성자속 분포 재생 문제에의 최대 엔트로피 원리에 의한 새로운 접근

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 510
  • Download : 510
This paper develops a new method for reconstructing neutron flux distribution, that is based on the maximum entropy Principle in information theory. The Probability distribution that maximizes the entropy Provides the most unbiased objective Probability distribution within the known partial information. The partial information are the assembly volume-averaged neutron flux, the surface-averaged neutron fluxes and the surface-averaged neutron currents, that are the results of the nodal calculation. The flux distribution on the boundary of a fuel assembly, which is the boundary condition for the neutron diffusion equation, is transformed into the probability distribution in the entropy expression. The most objective boundary flux distribution is deduced using the results of the nodal calculation by the maximum entropy method. This boundary flux distribution is then used as the boundary condition in a procedure of the imbedded heterogeneous assembly calculation to provide detailed flux distribution. The results of the new method applied to several PWR benchmark problem assemblies show that the reconstruction errors are comparable with those of the form function methods in inner region of the assembly while they are relatively large near the boundary of the assembly. The incorporation of the surface-averaged neutron currents in the constraint information (that is not done in the present study) should provide better results.
Publisher
한국원자력학회
Issue Date
1989-09
Language
English
Citation

NUCLEAR ENGINEERING AND TECHNOLOGY, v.21, no.3, pp.193 - 204

ISSN
1738-5733
URI
http://hdl.handle.net/10203/7153
Appears in Collection
NE-Journal Papers(저널논문)
Files in This Item

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0