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>> Tritium was attracted with high energy source in neutron fusion energy systems. A number of researchwas performed in tritium storage materials. The Korea was raised storage and delivery systems (SDS) of internationalthermonuclear experimental reactor (ITER) research. However, bottles of SDS would be important because of stability. The bottles have a welding zone, this zone will be vulnerable to hydrogen embrittlement. This zone havea high thermodynamic energy and heat deterioration. Therefore bottles were studied about hydrogen embrittlementto retain stability. The heat treatment of hydrogen was carried under pressure-composition-temperature (PCT) apparatus because of checking at real time. And then, mechanical properties were evaluated by tensile test andhardness test. In results of this study, hydrogen atmosphere condition is very important by tensile test and kineticstest. The samples were evaluated, that is more weak hydrogen pressure, increasing temperature and time. This results could be useful in SDS bottle designs.Key words : Hydrogen embrittlement(  ), Hydrogenation(), Tensile test(  ), Hardness(),Tritium storage(), SDS(  )

Hydrogen Brittleness on Welding Part for SDS Bottles