New Method to Analyze Equilibrium Cycle of Pebble-Bed Reactors

Hiroshi SEKIMOTO; Tohru OBARA; Shigeru YUKINORI; Eiichi SUETOMI

doi:10.3327/jnst.24.765

Hiroshi SEKIMOTO, Tohru OBARA, Shigeru YUKINORI, Eiichi SUETOMI

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Keywords: burn-up equation, computer codes, diffusion equation, distribution, effective multiplication factor, equilibrium cycle, fuel cycle, neutron flux, pebble-bed reactor, power equation, PREC, radioisotopes, SOR-Newton method, VSOP

JOURNAL FREE ACCESS

1987 Volume 24 Issue 10 Pages 765-772

DOI https://doi.org/10.3327/jnst.24.765

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Abstract

A new computer code PREC was developed to solve neutron and nuclide density distributions at the equilibrium cycle of pebble bed reactors. The PREC code has the following special advantages :
(1) To provide a direct solution of the equilibrium cycle
(2) To fix the effective multiplication factor as an input
(3) To treat continuous fuel movement
(4) To treat r-z two-dimensional geometry, leading in turn to the following special advantages :
(4-1) Ability to treat the cavity at the top of the core
(4-2) Ability to treat the curved fuel stream-line.

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