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Tritium permeation behavior in SiC/SiC composites

SiC/SiC複合材料におけるトリチウム透過挙動

磯部 兼嗣; 山西 敏彦; 小西 哲之*

Isobe, Kanetsugu; Yamanishi, Toshihiko; Konishi, Satoshi*

SiC/SiC複合材料の一つであるNITE-SiC/SiCのトリチウム透過について、低水素分圧及び軽水素で希釈された場合の透過挙動を調べた。トリチウムを用いることで、0.6Paの低水素分圧における水素透過を測定することに成功し、その定常透過フラックスが9.5$$times$$10$$^{-12}$$[mol/m$$^{2}$$sec]であることを明らかにした。トリチウムを軽水素で希釈した場合、同一のトリチウム分圧(0.6Pa)であっても、希釈度が増加するに伴い透過フラックスが減少することが明らかになった。

The measurement of tritium permeation behavior of NITE-SiC/SiC composites in both low tritium partial pressure and tritium diluted with hydrogen was carried out. Steady-state tritium permeation fluxes of NITE-SiC/SiC that has low permeability of hydrogen could be measured successfully by using tritium, even though low partial pressure (0.6 Pa). Steady-state tritium permeation fluxes were estimated to be 9.5$$times$$10$$^{-12}$$[mol/m$$^{2}$$sec]. In the experiment of tritium diluted with hydrogen, it was found that steady-states permeation fluxes was decreased with the increase of distillation rate, although the partial pressure of tritium in all condition was same (0.6 Pa).

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パーセンタイル:56.37

分野:Nuclear Science & Technology

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