TY - JOUR
T1 - Effect of rhenium addition on deuterium retention in neutron-irradiated tungsten
AU - Nobuta, Y.
AU - Toyama, T.
AU - Matsumoto, A.
AU - Shimada, M.
AU - Oya, Y.
AU - Inoue, K.
AU - Nagai, Y.
AU - Hatano, Y.
N1 - Funding Information:
A part of this work was performed under the flamework of Japan-US Research Collaboration FRONTIER Project and used resources at the HFIR, a DOE Office of Science User Facility operated by ORNL. The ORNL research was sponsored by the U.S. DOE, Office of Fusion Energy Sciences, under contract DE-AC05-00OR22725 with UT-Battelle, LLC. The authors are grateful for helpful supports from R. Shibahara, K. Kurano, and Y. Kume. This work was partly supported by JSPS KAKENHI Grant Numbers 17H03517 , 18H03688 , and 20H02661 . This work was partly performed under the GIMRT Program of IMR, Tohoku Univ. ( 20M0406 and 202012-IRKMA-0513 ).
Publisher Copyright:
© 2022
PY - 2022/8/1
Y1 - 2022/8/1
N2 - The effects of rhenium (Re) addition on deuterium (D) retention in neutron-irradiated tungsten (W) were investigated. Pure W and W-5Re (5 at.%) alloy samples were irradiated with neutrons at High Flux Isotope Reactor using MFE-RB-19 J capsule. The sample temperature and the damage level were 864 K and 0.35 dpa for pure W and 792 K and 0.26 dpa for W-5Re alloy. A portion of the samples was exposed to D plasma at Tritium Plasma Experiment at Idaho National Laboratory at 823 K to a fluence of 5 × 1025 m−2. Vacancy-type defects in neutron-irradiated samples were examined using positron annihilation spectroscopy (PAS); D retention after plasma exposure was evaluated by thermal desorption spectrometry (TDS). TDS measurements revealed that D retention in the neutron-irradiated W-5Re alloy was similar to that in the unirradiated W sample, whereas a significant increase in D retention was observed in neutron-irradiated W. Thus, Re addition significantly suppressed the increase in D retention after neutron irradiation. This effect was attributed to the suppression of vacancy-type defect formation, as confirmed by PAS.
AB - The effects of rhenium (Re) addition on deuterium (D) retention in neutron-irradiated tungsten (W) were investigated. Pure W and W-5Re (5 at.%) alloy samples were irradiated with neutrons at High Flux Isotope Reactor using MFE-RB-19 J capsule. The sample temperature and the damage level were 864 K and 0.35 dpa for pure W and 792 K and 0.26 dpa for W-5Re alloy. A portion of the samples was exposed to D plasma at Tritium Plasma Experiment at Idaho National Laboratory at 823 K to a fluence of 5 × 1025 m−2. Vacancy-type defects in neutron-irradiated samples were examined using positron annihilation spectroscopy (PAS); D retention after plasma exposure was evaluated by thermal desorption spectrometry (TDS). TDS measurements revealed that D retention in the neutron-irradiated W-5Re alloy was similar to that in the unirradiated W sample, whereas a significant increase in D retention was observed in neutron-irradiated W. Thus, Re addition significantly suppressed the increase in D retention after neutron irradiation. This effect was attributed to the suppression of vacancy-type defect formation, as confirmed by PAS.
KW - Hydrogen retention
KW - Plasma facing materials
KW - Positron annihilation spectroscopy
KW - Thermal desorption spectrometry
KW - Tungsten
KW - Tungsten-rhenium
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U2 - 10.1016/j.jnucmat.2022.153774
DO - 10.1016/j.jnucmat.2022.153774
M3 - Article
AN - SCOPUS:85130848188
SN - 0022-3115
VL - 566
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
M1 - 153774
ER -