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An Extension of Diffusion Theory for Thermal Neutrons Near Boundaries; EXTENSION DEL CAMPO DE VALIDEZ DE LA TEORIA DE DIFUSION PARA NEUTRONES TERMICOS EN LAS PROXIMIDADES DE BORDES

Technical Report ·
OSTI ID:4687018
The validity of elemental diffusion theory for determining the thermal neutron flux distribution in the region of a boundary between two dissimilar materials is examined. The theory is explained, and results of experiments with copper rods in light water are analyzed. The results show the distributions can be calculated with this theory if the diffusion coefficient of the rod (now dependent on the geometry as well as the material) is changed properly. An expression for the diffusion coefficient that gives results in satisfactory agreement with experiment is introduced. (D.C.W.)
Research Organization:
Spain. Junta de Energia Nuclear, Madrid
NSA Number:
NSA-17-031385
OSTI ID:
4687018
Report Number(s):
JEN-114-DF/I-33
Country of Publication:
Country unknown/Code not available
Language:
English