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Development of a 2-D 2-group neutron noise simulator for hexagonal geometries
- Source :
-
Annals of Nuclear Energy . Aug2010, Vol. 37 Issue 8, p1089-1100. 12p. - Publication Year :
- 2010
-
Abstract
- Abstract: In this paper, the development of a neutron noise simulator for hexagonal-structured reactor cores using both the forward and the adjoint methods is reported. The spatial discretisation of both 2-D 2-group static and dynamic equations is based on a developed box-scheme finite difference method for hexagonal mesh boxes. Using the power iteration method for the static calculations, the 2-group neutron flux and its adjoint with the corresponding eigenvalues are obtained by the developed static simulator. The results are then benchmarked against the well-known CITATION computer code. The dynamic calculations are performed in the frequency domain which leads to discarding of the time discretisation. Then, the developed 2-D 2-group neutron noise simulator calculates both the discretised forward and the adjoint reactor transfer function between a point source and its induced neutron noise, by assuming the neutron noise source as an “absorber of variable strength” type. The neutron noise induced by a “vibrating absorber” type of noise source may also be modeled using the calculated transfer function. The viability of the simulator is verified for different benchmark cases. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 03064549
- Volume :
- 37
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- Annals of Nuclear Energy
- Publication Type :
- Academic Journal
- Accession number :
- 51154547
- Full Text :
- https://doi.org/10.1016/j.anucene.2010.04.007