Thermal stability of the lining in a zirconium dioxide trap in a major accident

Test results are presented on the thermal stabilities of specimens and full -scale components (bricks) made of a new ceramic based on zirconium dioxide . The thermal resistance has been improved by rising a certain ratio of coa rse-grained and fine-grained fractions. The resistance has been determined by the use of single or repeated heating and cooling cycles. The data give a forecast of the resistance when these components are used in the coating of a trap subject to the action of molten core material in major nuclear po wer station accidents.