Abstracts and Available Papers Presented at the
2000 International RERTR Meeting

REACTIVITY EFFECT OF POISONED BERYLLIUM BLOCK SHUFFLING
IN THE MARIA REACTOR

K. Andrzejewski, T. Kulikowska

Institute of Atomic Energy, Poland

ABSTRACT

The paper is a continuation of the analysis of beryllium blocks poisoning by Li-6 and He-3 in the MARIA reactor, presented at the 22 RERTR Meeting in Budapest. A new computational tool, the REBUS-3 code, has been used for predicting the amount of poison. The code has been put into operation on a HP computer and the beryllium transmutation chains have been activated with assistance of the ANL RERTR staff. The horizontal and vertical poison distribution within beryllium blocks has been studied. A simple shuffling of beryllium blocks has been simulated to check the effect of exchanging a block with high poison concentration, adjacent to fuel elements, with a peripheral one with a low poison concentration.

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