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Journal Articles

Radiation-induced thermoelectric sensitivity in the mineral-insulated cable of magnetic diagnostic coils for ITER

Nishitani, Takeo; Vayakis, G.*; Yamauchi, Michinori*; Sugie, Tatsuo; Kondoh, Takashi; Shikama, Tatsuo*; Ishitsuka, Etsuo; Kawashima, Hisato

Journal of Nuclear Materials, 329-333(Part2), p.1461 - 1465, 2004/08

 Times Cited Count:15 Percentile:28.62(Materials Science, Multidisciplinary)

no abstracts in English

JAEA Reports

Report of the 13th IEA Workshop on Radiation Effects in Ceramic Insulators; December 9, 2003, Kyoto (Cooperative research)

Department of Fusion Engineering Research

JAERI-Review 2004-004, 96 Pages, 2004/03

JAERI-Review-2004-004.pdf:14.47MB

no abstracts in English

Journal Articles

Oxygen potential measurements of pyrochlore-type Zr$$_{2}$$M$$_{2}$$O$$_{7+x}$$7(M=Pu, Ce) by EMF method

Otobe, Haruyoshi; Nakamura, Akio; Yamashita, Toshiyuki; Ogawa, Toru

Journal of Nuclear Science and Technology, 39(Suppl.3), p.652 - 655, 2002/11

Pyrochlore-type (P-type) zirconia has been widely studied as a disposable form of the high-level radioactive nuclear waste. We have developed the EMF (electromotive force) measurement system using the cubic zirconia sensor, in order to investigate the oxygen potential ($$Delta$$g(O$$_{2}$$)) of P-type Zr$$_{2}$$Pu(Ce)$$_{2}$$O$$_{7+x}$$. For P-type Zr$$_{2}$$Ce$$_{2}$$O$$_{7+x}$$ at 1078 K, we have found that $$Delta$$g(O$$_{2}$$) vs. oxygen composition (x) relationship has different behavior between x more than 0.34 and x less than 0.34. This may suggest that the degree and way of the ordering of oxide ions (O$$^{2-}$$) and oxygen vacancies (V0) should change around x =0.34. We have also measured the $$Delta$$g(O$$_{2}$$) vs. temperature (T) relationship between 763 and 1078 K at various x, and derived the partial molar enthalpy (h(O$$_{2}$$)) and entropy (s(O$$_{2}$$)) of oxygen. It was found that h(O$$_{2}$$) and s(O$$_{2}$$) of P-type Zr$$_{2}$$Ce$$_{2}$$O$$_{7+x}$$ exhibit significantly different behavior from those of fluorite-type CeO$$_{2-x}$$. The similar experiments are in progress for P-type Zr$$_{2}$$Pu$$_{2}$$O$$_{7+x}$$, and the results are discussed in comparison with those of P-type Zr$$_{2}$$Ce$$_{2}$$O$$_{7+x}$$ mentioned above.

JAEA Reports

Journal Articles

Thermal diffusivity measurement of molten salts by use of a simple ceramic cell

; Furukawa, Kazuo; *; *

High Temperatures-High Pressures, 15, p.191 - 198, 1983/00

no abstracts in English

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