[1N05-09] Applications of Quantum Beam and Targets 1

[1N08] R&D on Mercury Target for Spallation Neutron Source to Improve the Durability under High Power Operation

(4)Development of Technique on Radiation Damage Evaluation on the Mercury Target to Estimate the Residual Lifetime

*Takashi Wakui¹, Shigeru Saito¹, Eiichi Wakai¹, Tomoki Sakai², Kotaro Mori², Masatoshi Futakawa¹ (1. JAEA, 2. Ibaraki Univ.)

Keywords:Mercury target, Radiation damage, Indentation test, Tensile properties, Residual lifetime estimation, Inverse analysis

One of dominant factors to determine the lifetime of the mercury target in J-PARC is the radiation damage. Authors suggested the tensile properties evaluation technique from numerical tensile tests using material properties estimated from inverse analyses on indentation tests. The technique was applied to ion-irradiated materials, and the validity of the technique was investigated by comparing the result with results of the PIE on the targets of SNS. By conducting indentation tests on samples cut out from used targets, it is expected that the residual lifetime estimation can be conducted considering various effects; fatigue, temperature, LME, etc. superimposed on the radiation damage from evaluating hardness and tensile properties obtained by the technique. The technique and comparison results will be discussed.