Since 1978
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RUSSIAN FEDERAL
NUCLEAR CENTER -
ALL-RUSSIAN RESEARCH INSTITUTE
OF EXPERIMENTAL PHYSICS
 
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COMPUTATION OF ANISOTROPIC GROUP CONSTANTS OF RDK AND RAK CODES

G. V. Lukin, V. M. Shmakov
VANT. Ser. Metodiki i Programmy Chislennogo Resheniya Zadach Matematicheskoy Fiziki 1986. Вып.1. С. 42-44.

      A new two-stage approach to computation of group neutron constants is presented. RAK-code data may be used in routines for solving neutron transfer equations by spherical harmonics method, SN-method with various transport corrections and some other methods.



LIBRARIES OF THE SET OF SOFTWARE CONSTANTS FOR KOBRA COMPUTATIONS. USADE OF ENDL, ENDF LIBRARIES

Ya. Z. Kandiyev, E. S. Kuropatenko, G. V. Lukin, Е. I. Cherepanova, V. M. Shmakov
VANT. Ser. Metodiki i Programmy Chislennogo Resheniya Zadach Matematicheskoy Fiziki 1986. Вып.1. С. 45-47.

      The content and field of application of ISKHOD and PROM spectral libraries, pre-group BDK-1ibrary, group BGRYAK-1ibrary are described. The spectral libraries contain consistent information for computations of simultaneous passage of neutrons, gamma-ray quanta, e-, e+, and heavy charged particles in any combination. The pre-group and group libraries contain information on neutron-matter interaction allowing for gamma-yield. An algoritm of section information reduction in resonance regions is presented.



ON A DERIVATION OF GENERALIZED TRANSPORT APPROXIMATION

V. M. Shmakov
VANT. Ser. Metodiki i Programmy Chislennogo Resheniya Zadach Matematicheskoy Fiziki 1986. Вып.1. С. 75-77.

      An approach is suggested which consists in comparison of components of Legendre polynomial expansion of two angle flows generated after one interaction process, whose anisotropy, in its turn, is described in various approximations. Formulas are obtained for cross-section corrections, secondary neutron numbers, and components of intergroup transition matrix expansion. The formulas suggested preseve reproduction properties of (n,2n) - type reactions and angular distribution moments. Limitations on the quantity of the cross-section correction are revealed.



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