Theoretische Studien am Erstkern eines 300 MWe Kugelhaufenreaktors während des Beladens

Theoretical analysis on a loading experiment of a pebble bed reactor particularly in regard to the loading method, has been performed. This report describes the calculating models and gives information for the first loading. An alternative loading scheme has been examined, in which at the beginning of the loading experiment the lower part of the core is filled with graphite spheres only. It is shown that nitrogen as a neutron poison for compensating excess reactivity may be used.