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WOOD, G. , Unpublished Work; Seeding Using Small Seed Crystals WATSON, R. , HOWARD, R. , WOOD, G. , BNFL MEMO 865(S), Evaluation of High Temperature Stoichiometric Sintering of Undoped UO2 for Large Grain Fuel Manufacture. [5] [6] [7] [8] DISCUSSION (Questions are given in italics) Are you going to perform evaluation in these seeded UC>2? ) Could you indicate experimental evidence that the results through a binderless route would be similar? (2) In industrial fabrication, not only seeds and pure IDR powder will need to be used but also scrap recycle.

Seeds can be made by: * Crushing sintered pellets and sieving the crush to obtain desired size of seed. * Disintegration of UC>2 at high temperature at >2000C in dry hydrogen UC>2 sintered pellet disintegrate into essentially single grains which can be used to seed grain growth. MK3CT •IAKK """""" " Imj 59 FUEL FABRICATION — GADOLINIA AND MOX FUEL (Session 2) NEXT toft BLANK A STUDY OF THE UO2/Gd2O3 COMPOSITE FUEL XA9847845 D. ). This paper summarizes the results of studies performed on UO2/Gd203 composite fuels.

63 In order to avoid distorting the shape of the Gd2O3 macrospheres during pressing, it was found useful to consolidate them by a preliminary heat treatment before mixing them with the UO2 powder. Three different batches were characterized in order to study the effects of the preliminary consolidation of the macrospheres on the final microstructure, the sinterability and the thermal conductivity of the composite structure. The various batches studied are described in Table 1. 3. CHARACTERIZATION OF THE BATCHES 3.

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