Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Soejima, Goro; Iwai, Hiroki; Nakamura, Yasuyuki; Tsuzuki, Satoshi*; Yasunaga, Kazushi*; Kume, Kyo*
Heisei-29-Nendo Koeki Zaidan Hojin Wakasawan Enerugi Kenkyu Senta kenkyu Nempo, 20, P. 80, 2018/11
We investigated the behavior of the dust generated by Laser and Plasma-arc cutting underwater and in air aimed at the simulant material of reactor components (SUS304) and the pressure and calandria tube (Zr-2.5%Nb, Zry-2) of the prototype reactor "FUGEN".
Soejima, Goro; Iwai, Hiroki; Kadowaki, Haruhiko; Nakamura, Yasuyuki; Tsuzuki, Satoshi*; Yasunaga, Kazushi*; Nakata, Yoshinori*; Kume, Kyo*
Heisei-28-Nendo Koeki Zaidan Hojin Wakasawan Enerugi Kenkyu Senta kenkyu Nempo, 19, P. 9, 2017/10
no abstracts in English
thin film induced by He precipitationSerizawa, Hiroyuki; Yamamoto, Shunya*; Yasunaga, Kazushi*
QST-M-2; QST Takasaki Annual Report 2015, P. 68, 2017/03
Recent investigation examined by JAEA showed that a gas bubble bounded by facets is formed in UO during a process of a precipitation of helium followed by injection with HIP. The interest phenomena they found is that the shape of the negative crystal changes depending on the inner pressure of cavity, which implies that the shape of the cavity can be transformed by controlling the condition of helium release followed by the injection. This paper addresses the detailed observation of the gas bubble formation in the thin film using STEM.
Serizawa, Hiroyuki; Kaji, Yoshiyuki; Yamamoto, Shunya*; Yasunaga, Kazushi*; Oishi, Yuji*; Yamanaka, Shinsuke*
no journal, ,
Pieces of CeO(100) thin film were heat treated at 1273 K for 2h. The films were irradiated with 130-keV He
ions from 400-keV ion implanter of TIARA. The ion doped film was heat treated at 1773 K for 2h in air. The sample for STEM analysis was prepared by FIB. It was found that many blisters are formed on the surface of the thin film. The idea of gas-driven blister growth on a metal surface was first proposed by Evans et al.. So, the blisters are considered to be formed by gas babble formed accompanied by precipitation of He just under the surface. Many gas babbles are formed in the thin film. The size of the gas bubble falls within the range 30-100 nm. The shape of the gas bubble is truncated octahedron but clearly different from that of void, which mean, the existence of He in the gas bubble effect on the shape of the gas bubble.
