A NEW APPROACH TO THE PROBLEM OF NEUTRON DIFFUSION NEAR BOUNDARIES BY MEANS OF ELEMENTARY DIFFUSION THEORY

Journal Article · Sun Dec 01 04:00:00 EST 1963 · Nukleonik (West Germany) Discontinued with vol. 12

OSTI ID:4077223

Rivas, J L.A.; Mayquez, E R

The experimental study of thermal neutron flux distributions inside and outside absorbing rods immersed in a moderator demonstrates that if LAMBDA /sub a/ < d (d = rod diameter), the elementary diffusion theory gives correct predictions of the experimental measurements, provided an appropriate coefficient of diffusion is chosen for the rod. This coefficient is determined by the material and diameter of the rod. The value of this coefficient is obtained by means of a crude model which gives D = 1/3 STA( lambda /sub tr/- (d)/(e/sup d// lambda /sub tr/- 1)!, LAMBDA /sub tr/ being the transport mean free path of the material and d the diameter of the rod. In the present paper many experimental results of several authors were used to check the validity of this expression. (auth)

• Research Organization: Junta de Energia Nuclear, Madrid
• NSA Number: NSA-18-015441
• OSTI ID: 4077223
• Journal Information: Nukleonik (West Germany) Discontinued with vol. 12, Journal Name: Nukleonik (West Germany) Discontinued with vol. 12 Vol. Vol: 5; ISSN NUKKA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
DIFFUSION
MATHEMATICS
MEASURED VALUES
MODERATORS
NEUTRON FLUX
NEUTRONS
QUANTITATIVE ANALYSIS
REACTOR TECHNOLOGY
REACTORS
RODS
THERMAL NEUTRONS
THICKNESS
TRANSPORT THEORY