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Abstract

MATERIALS USED FOR CONSTRUCTION OF THE FIRST WALL AND BLANKET IN A LOW PLASMA-DENSITY FUSION REACTOR MUST BE ABLE TO WITHSTAND UP TO 300 DPA IN THEIR LIFETIME. THE MATERIALS TEST AND DEVELOPMENT PROGRAMME USES VARIOUS METHODS TO SIMULATE THE EFFECTS OF 14 MEV NEUTRONS, BASED ON SELF-ION,LIGHT-ION HIGH ENERGY PROTON BEAMS AND FISSION NEUTRONS. HOWEVER ALL ION-BEAM EXPERIMENTS ARE LIMITED TO THE USE OF THIN FOILS, RATHER THAN THE INVESTIGATIONS OF MATERIALS IN BULK AND THEIR WELDINGS THAT WILL BE NEEDED TO OPERATED UNDER LARGE THERMAL STRESS GRADIENTS. THE HYDROGEN TO HELIUM RATIO AND THE PRODUCTION OF TRANSMUTATION PRODUCTS IS MORE THAN TEN TIMES LOWER THAN WITH FUSION NEUTRONS. AN OPTIMIZED SPALLATION NEUTRON SOURCE BASED ON A CONTINUOUS BEAM OF 600 MEV, 6MA PROTONS IS SUITABLE TO SIMULATE FIRST WALL CONDITIONS.

Additional information

Authors: KLEY W, JRC-KARLSRUHE;BISHOP G R, JRC-KARLSRUHE;SINHA A JRC-KARLSRUHE, JRC-KARLSRUHE
Bibliographic Reference: PAPER PRESENTED: 3RD INTERNATIONAL CONFERENCE ON FUSION REACTOR MATERIALS, KARLSRUHE/D, OCT. 4-8, 1987. JOURNAL OF NUCLEAR MATERIALS, VOLS. 155-157, PP 1320-1324, 1988
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