NT & RP Journal
A SIMULATION OF A PEBBLE BED REACTOR CORE BY THE MCNP-4C COMPUTER CODE
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Vol. XXIV, No. 3, Pp. 157-218
December 2009
UDC 621.039+614.876:504.06
ISSN 1451-3994

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Pages: 177-182

Authors:
Khalil Moshkbar BAKHSHAYESH, Naser VOSOUGHI

Abstract

Lack of energy is a major crisis of our century; the irregular increase of fossil fuel costs has forced us to search for novel, cheaper, and safer sources of energy. Pebble bed reactors an advanced new generation of reactors with specific advantages in safety and cost might turn out to be the desired candidate for the role. The calculation of the critical height of a pebble bed reactor at room temperature, while using the MCNP-4C computer code, is the main goal of this paper. In order to reduce the MCNP computing time compared to the previously proposed schemes, we have devised a new simulation scheme. Different arrangements of kernels in fuel pebble simulations were investigated and the best arrangement to decrease the MCNP execution time (while keeping the accuracy of the results), chosen. The neutron flux distribution and control rods worth, as well as their shadowing effects, have also been considered in this paper. All calculations done for the HTR-10 reactor core are in good agreement with experimental results.

Key words: HTR-10, MCNP-4C, neutron flux, pebble bed, shadowing effects

FULL PAPER IN PDF FORMAT (1.14 MB)

Vinča Institute of Nuclear Sciences :: Designed by milas :: July 2007
Last updated on September, 2010