Kabushiki Kaisha Toshiba

Toshiba Materials Co., Ltd.

Toshiba Energy Systems & Solutions Corporation

Koichi Nittoh

Chikara Konagai

Takeshi Takahara

Yukihiro Fukuta

Takashi Noji

Nobuaki Nakashima

Yoshitaka Adachi

Akihisa Saito

Eiji Oyaizu

Hitoshi Sakai

Kazuki Hida

Toshiyuki Tamura

Kohichi Nakayama

Katsumi Hosaka

Tadashi Ikehara

Mikio Uematsu

Masayo Kato

Yukio Sonoda

A neutron grid, comprises: a grid including: a plurality of spacers through which at least a part of first neutrons from a target passes; and a plurality of absorbers to absorb at least a part of second neutrons scattered thorough the target, the spacers and the absorbers being alternately arranged along a first direction and extending along a second direction intersecting with the first direction; and a pair of covers through which at least a part of the first neutrons and at least a part of the second neutrons pass, sandwiching the grid along a third direction intersecting with the first and second directions. A thermal expansion coefficient difference between one of the spacers and one of the absorbers is &#xb1;9&#xd7;10/&#xb0; C. or less, or Young's modulus of the spacer is 100 GPa or more.

Neutron grid, neutron grid stack, neutron grid device, and method of manufacturing neutron grid

A nondestructive identification device includes: a radiation sourceirradiating an x-rayto a standard samplemade of a known material and a sample; a sensordetecting a radiation ray having transmitted the standard sampleand the sample; a signal processing deviceconverting a signal of the sensorinto an image; an image processing devicewhich performs adjustment on an entire second image to make a luminance value of a part of the standard samplein the obtained image or a relation between the luminance value and a thickness of the standard samplein a first image where the energy of the radiation sourceis first energy be the same as that in the second image where the energy of the radiation sourceis second energy, and which performs a computation processing to take a difference or a ratio between the adjusted second image and the first image; and a display devicedisplaying an image.

Nondestructive identification method and nondestructive identification device

An object of the present invention is to provide an X-ray image tube which enables acquisition of an image of a proper density by increasing contrast without increasing an irradiation dose of X-rays. The X-rays absorbed or scattered through a subject emit light on an input surface formed in an input window, and the light is further converted into electrons on a photoelectric surface which converts the light into the electrons, accelerated and focused by a focusing electrode, and then guided to an anode side. The electrons guided to the anode side are made visible by a fluorescent substance, and an image of a color is projected on a glass plate with a luminance and a color based on a distribution of the incident X-rays in accordance with the dose of the X-rays.

X-ray image tube, X-ray image tube device and X-ray device

A color radiography system comprises a color light emission sheet having a phosphor layer that contains a phosphor emitting in a plurality of colors to radiation and emits light under irradiation of radiation transmitted through a subject to be inspected, and a color film or a color camera that detects the light emissions of the plurality of colors into the respective colors. In the phosphor layer, a phosphor is used that has a primary emission component corresponding to one emission color in a visible light region and at least one secondary emission component, the secondary emission component having an emission color different from that of the primary emission component and a ratio of light emission to radiation of the same intensity being different from that of the primary emission component. According to the present color radiography system, image information of a plurality of colors having different sensitivity characteristics can be obtained. The image information of an appropriate density can be obtained under various conditions.

Method and apparatus for color radiography, and color light emission sheet therefor

A radiation discriminative measurement is performed by using a radiation discriminative measuring apparatus which comprises a radiation source for radiating radiations, first, second and third scintillators disposed in a region which is irradiated with the radiations radiated from the radiation source, and an image pickup means to deal with the light beams emitted from the first, second and third scintillators and the discrimination measurement includes the steps of arranging the first, second and third scintillators in a region which is irradiated with the radiations radiated from the radiation source, causing the first scintillator to respond to type A, type B and type C radiations radiated from the radiation source and to emit alight beam in a first wavelength region, causing the second scintillator to respond to type B and type C radiations which pass through the first scintillator so as to to emit a light beam in a second wavelength region, and causing the third scintillator to respond to a type C radiation which passes through the third scintillator so as to emit a light beam in a third wavelength region which is different from said first and second wavelength regions. The data of the scintillators are corrected in accordance with the wavelengths and the measurement of radiations according to the type thereof is discriminated and simultaneously measured.

Radiation discriminative measuring apparatus and radiation discriminative measuring method

Gadolinium is provided which is adapted for nuclear fuel as a burnable poison, having a plurality of isotopes in an isotopic composition such that the content of at least one even mass numbered isotope is smaller than the content of the same isotope in natural gadolinium. A fuel assembly is also provided having a plurality of nuclear fuel rods arrayed as a lattice in which at least one of the fuel rods contains the gadolinium burnable poison of the present invention. Also, a fuel assembly is described which has a plurality of nuclear fuel rods arrayed as a lattice which includes at least a first group and a second group of nuclear fuel rods containing gadolinium. The content of Gd-157 in the gadolinium is larger than that found in natural gadolinium. Further, the gadolinium concentrations in the first and second groups are different from each other.

Nuclear fuel containing gadolinium

Growing community of inventors

Yokohama, Japan

Koichi Nittoh