Hitachi, Ltd.

Hitachi Chemical Company, Ltd.

Kazuhiro Yoshida

Yoshitoshi Ito

Shin Takahashi

Kanji Kato

Hiroyuki Ishibashi

Keiji Sumiya

Tsutomu Omae

Taro Iwamoto

Katsumi Takami

Kazuhisa Kurashige

Kazushige Kohno

Naoaki Shimura

Tatsuo Goto

Shimon Ando

Sho Kusumoto

Kiyoo Takeyasu

Takaichi Koyama

Nachimuthu Senguttuvan

Toshitaka Suzuki

Yoozoo Oouchi

Masatake Takidera

Kunio Hamada

An object of the invention is to reduce the charging overvoltage by using a positive electrode member which does not contain a carbon material that causes the generation of lithium carbonate (LiCO), and which comprises a metal porous material, thereby suppressing the formation of lithium carbonate (LiCO). The metal air secondary battery of the invention is characterized by having a negative electrode member which has metal ions occluded therein and emits metal ions, a positive electrode member which ionizes oxygen, and a separator which is impregnated with an electrolyte and disposed between the negative electrode member and the positive electrode member, wherein the carbon weight in the total weight of a carrier, a catalyst, and a binder constituting the positive electrode member is 50% or less.

Metal air secondary battery

The present invention provides an inorganic scintillator including a matrix material comprising a metal oxide, and a luminescence center made of Ce contained in the matrix material, the inorganic scintillator being adapted to scintillate in response to a radiation; wherein the matrix material further comprises a dopant having a tetravalent ionization energy I [kJ&#xb7;mol] satisfying the condition represented by the following expression (1):3000&#x2266;I&#x2266;3500. &#x2003;&#x2003;(1)

Inorganic scintillator

In a method and a system for inspection of the inside of a nuclear reactor vessel in which an inspection device for inspecting a defect in a nuclear reactor vessel is so moved by a drive/control device as to permit inspection of a part to be inspected in the reactor vessel, and the presence or absence of defect in the reactor vessel is judged based upon information from the inspection device in the course of the above-mentioned movement of the inspection device; the movement of the inspection device is pursued and monitored by monitor means, and the movement of the inspection device is suppressed when an abnormality in the movement of the inspection device is judged based upon information from the monitor means, to avoid the abnormal movement.

Method and system for inspection of inside of nuclear reactor vessel

Apparatus for inspecting pipes in a plant, comprising an elongate inspection head portion which is provided with an optical system for receiving an inspection image by approaching an inner surface of a pipe being an object to-be-inspected; at least one proximity sensor which is disposed in the inspection head portion in order to detect a relative distance between the inspection head portion and the proximate object; a positioning mechanism which consists of a plurality of driving shafts for advancing or retreating, rotating, and revolving the inspection head portion; a control device which is capable of programmed operation and which drives and controls the positioning mechanism in a predetermined operation sequence programmed in advance; a data storage device which stores positional data of the respective driving shafts of the positioning mechanism; and an image processor which is disposed at a position remote from the inspection head portion and which reconstructs the inspection image from video signals; the control device controlling the positioning mechanism on the basis of an output signal from the proximity sensor, so that the inspection head portion can be moved and controlled from an initially-set position outside the pipe towards an inspection position of the pipe without contacting with the object to-be-inspected.

Apparatus for inspecting pipes in a plant

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Hitachi, Japan

Kazuhiro Yoshida