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31. 12. 1994.
Measurement of {beta}{sub eff} in the coupled fast-thermal system HERBE
The delayed neutron parameters and methods used for calculation in reactor safety studies are verified by measurement of the effective delayed-neutron fraction {beta}{sub eff} in the coupled fast-thermal system HERBE. The HERBE system is strongly heterogeneous. It consists of the fast core loaded with the natural uranium fuel elements. The thermal core is composed of the 80% enriched UO{sub 2} moderated and reflected by heavy water. Methods applied in the calculation and interpretation of {beta}{sub eff} measurement are described in this paper.