Abstract: A two-dimensional radiation display device includes: a data acquisition unit that acquires two-dimensional radiation data detected a plurality of times from a plurality of radiation detectors; a data division processing unit that divides the two-dimensional radiation data into data regions of each section of specified direction; an integration processing unit that integrates the two-dimensional radiation data that is detected a plurality of times, for each section of specified direction; a data synthesis processing unit that synthesizes the integration values integrated for each section of specified direction into two-dimensional data including radiation distribution; and an image output unit that outputs two-dimensional data indicating radiation distribution as display data in accordance with a prescribed display format.

Abstract: A two-dimensional radiation display device includes: a data acquisition unit that acquires two-dimensional radiation data detected a plurality of times from a plurality of radiation detectors; a data division processing unit that divides the two-dimensional radiation data into data regions of each section of specified direction; an integration processing unit that integrates the two-dimensional radiation data that is detected a plurality of times, for each section of specified direction; a data synthesis processing unit that synthesizes the integration values integrated for each section of specified direction into two-dimensional data including radiation distribution; and an image output unit that outputs two-dimensional data indicating radiation distribution as display data in accordance with a prescribed display format.

Abstract: A safety protection instrumentation system for a nuclear reactor is constructed by using digital logic. The digital logic includes functional units in which output logic patterns corresponding to all input logic patterns are verified in advance and a functional module formed by combining the functional units.

Abstract: A radiation measurement device includes a radiation detector generating an analog signal containing pulse components, an A/D converter converting the analog signal into sampled data, an n-th power pulse discrimination unit calculating n-th power values of the sampled data to discriminate the pulse component, where n is two or more, and a pulse counter counting a number of the discriminated pulse components.

Abstract: A safety protection instrumentation system for a nuclear reactor is constructed by using a digital logic, in which the digital logic includes functional units in which output logic patterns corresponding to all input logic patterns are verified in advance and a functional module formed by combining the functional units.

Abstract: A radiation measurement device includes a radiation detector generating an analog signal containing pulse components, an A/D converter converting the analog signal into sampled data, an n-th power pulse discrimination unit calculating n-th power values of the sampled data to discriminate the pulse component, where n is two or more, and a pulse counter counting a number of the discriminated pulse components.

Abstract: A radiation measurement device includes a radiation detector generating an analog signal containing pulse components, an A/D converter converting the analog signal into sampled data, an n-th power pulse discrimination unit calculating n-th power values of the sampled data to discriminate the pulse component, where n is two or more, and a pulse counter counting a number of the discriminated pulse components.

Abstract: A radiation measurement device includes a radiation detector generating an analog signal containing pulse components, an A/D converter converting the analog signal into sampled data, an n-th power pulse discrimination unit calculating n-th power values of the sampled data to discriminate the pulse component, where n is two or more, and a pulse counter counting a number of the discriminated pulse components.

Abstract: A radiation measurement device includes a radiation detector generating an analog signal containing pulse components, an A/D converter converting the analog signal into sampled data, an n-th power pulse discrimination unit calculating n-th power values of the sampled data to discriminate the pulse component, where n is two or more, and a pulse counter counting a number of the discriminated pulse components.

Abstract: In a radiation detecting apparatus, an &agr; ray and &bgr; ray are transmitted through a light shielding film but an incident light is shielded. A first light is emitted from a first scintillator by the &agr; ray transmitted through the light shielding film. The first scintillator has an emission center wavelength based on the &agr; ray. A second light is emitted in a second scintillator by the &bgr; ray transmitted through the light shielding film. The second scintillator has an emission center wavelength based on the &bgr; ray. The first and second lights are detected by two photo-detectors, respectively. The first emission center wavelength and the second emission center wavelength are different from each other.

Abstract: In a radiation detecting apparatus, an &agr; ray and a &bgr; ray are transmitted through a light shielding film but an incident light is shielded. A first light is emitted from a first scintillator by the &agr; ray transmitted through the light shielding film. The first scintillator has an emission center wavelength based on the &agr; ray. A second light is emitted in a second scintillator by the &bgr; ray transmitted through the light shielding film. The second scintillator has an emission center wavelength based on the &bgr; ray. The first and second lights are detected by two photo-detectors, respectively. The first emission center wavelength and the second emission center wavelength are different from each other.

Abstract: A radiation measurement device includes a radiation detector generating an analog signal containing pulse components, an A/D converter converting the analog signal into sampled data, an n-th power pulse discrimination unit calculating n-th power values of the sampled data to discriminate the pulse component, where n is two or more, and a pulse counter counting a number of the discriminated pulse components.

Abstract: A radiation detector for detecting radiation comprises a scintillator, a first light guide, a plurality of second light guides and a photo detector. The scintillator generates a scintillated light in response to received radiation. The first light guide, which is connected to the scintillator, has a fluorescence characteristic. The second light guide has a common surface arranged at the opposite side of the surface of the scintillator where radiation is received, and the second light guide has a fluorescence characteristic. The photo detector is connected to the first light guide and the second light guide, and detects a fluorescent light therein.

Abstract: There is provided a radiation detector capable of discriminating a kind of rays in radiation. The radiation detector includes a scintillator and a discriminator. The scintillator scintillates depending on the type of radiation and generates a first output signal and second output signals after the first output signal. The second output signals vary the signal pattern thereof with a kind of rays in radiation. The discriminator discriminates a kind of rays in radiation based on the first signal and the second signals. The scintillator has multiple scintillation characteristics, and includes Gd2O2S (GOS) or Y2O2S (YOS), for example.

Abstract: A radiation detector D comprises: a scintillator 1, a main light guide 4, a wavelength shift fiber 5 passing through the main light guide 4, and an auxiliary light guide 2 provided between the scintillator 1 and the main light guide 4. The scintillator 1 is designed to emit scintillation light in response to incoming radiation. The main light guide 4 is surrounded by a plane 4a of incidence, for allowing the scintillation light to be incident thereon, and a reflecting surface for inwardly reflecting the scintillation light entering the plane 4a of incidence. The wavelength shift fiber 5 is designed to absorb the scintillation light entering the main light guide 4 to re-emit the scintillation light as fluorescent pulses of a longer wavelength to allow the re-emitted fluorescent pulses to simultaneously leave both ends 5a, 5b.

Abstract: An optical-modulation-type sensor comprises an input condenser lens for collecting light from a light source, a polarizer for linearly polarizing the light from the input condenser lens, a light-transmissive piezo-oscillator which is provided with an oscillator circuit and to which the linearly polarized light is introduced from the polarizer, an analyzer for linearly polarizing the light from the piezo-oscillator, and an output condenser lens for converging the linearly polarized light from the analyzer.

Abstract: A radiation measuring apparatus capable of measuring radiation by means of few measuring devices without requiring use of power sources, electronic circuits, etc. in places of measurement, and of carrying out high-efficiency multipoint measurement at low cost. Each scintillation detector is provided with two light outlet ports at the opposite ends thereof, individually, and a plurality of scintillation detectors are connected in series with one another by means of optical fibers. The optical fibers are connected individually to the opposite ends of each scintillation detector, and the optical fibers of a plurality of scintillation detectors are connected in parallel with one another.