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JAEA Reports

Reactivity effect of spent fuel depending on burn-up history

Hayashi, Takafumi*; Suyama, Kenya; Mochizuki, Hiroki*; Nomura, Yasushi

JAERI-Tech 2001-041, 158 Pages, 2001/06

JAERI-Tech-2001-041.pdf:5.15MB

no abstracts in English

JAEA Reports

Investigation of operating condition; The report for investigation of bituminization demonstration facility incident(4/7)

; ; Kurosawa, A.; Hayashi, Naomi; Kobayashi, Kentaro; Kitajima, Takafumi; Sato, Yoshihiko

PNC TN8410 98-047, 278 Pages, 1998/02

PNC-TN8410-98-047.pdf:19.5MB

The fire and explosion incident occurred at the Bituminization Demonstration Facility of the Tokai Reprocessing Plant on march 11th, 1997. For investigation of Bituminization Demonstration Facility Incident and prevention relapse, Investigation Group for Bituminization Demonstration Facility incident was set up. It has been investigated the situation at the time of incident was occurred. The result of investigated was presented for Science and Technology Agency. This report is arranged the result of investigated the situation for investigation and prevention relapse.

Oral presentation

Development of thermal diffusivity measurement method for surface coating material by the laser spot periodic heating radiation thermometry method

Hayashi, Takeru*; Nishi, Tsuyoshi*; Ota, Hiromichi*; Hatori, Kimihito*; Awano, Takaaki*; Igarashi, Takahiro; Koshina, Takafumi*

no journal, , 

In order to establish deterioration diagnosis technology for surface coating materials, we examined the measurement method and analysis method. The local thermal diffusivity could be measured by the laser spot periodic heating radiation thermometry method. In addition, it was also measured the thermal diffusivity by the xenon flash method to compare that by the laser spot periodic heating radiation thermometry method. A two-layer analytical formula was constructed for the coating sample, because there is a possibility that single-layer analysis may not give accurate results. As a result of measurement at room temperature, the thermal diffusivity decreased remarkably in the thickness direction measurement when the coating surface was placed on the detection surface side. On the other hand, the thermal diffusivity kept remained when the coating surface was placed on the heating surface side.

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