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JP3219893B2 |
PURPOSE: To widen the frequency range for analyzing and improve analysis accuracy by providing a time information analysis part analyzing the frequency of output signal from a neutron detector continuously for time. CONSTITUTION: Output ...
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JP2001255379A |
To provide an inexpensive neutron detector with few component parts.A boron film 3a is formed in a part of a thin part of an upper electrode 14 formed on a diode amorphous silicon film 12 made of the heterojunction of an amorphous silico...
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JP2001511528A |
A system for criticality incident detection is described. The system comprises a plurality of sensors at least partially comprised of storage phosphors. The sensors are distributed throughout the environment to be monitored. The sensors ...
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JP2001215282A |
To provide a measuring method of a neutron dose capable of measuring correctly the dose of fast neutron beams pouring from the universe.This method includes a process in which high energy neutron beams having a known dose are made to irr...
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JP2001183465A |
To provide a neutron measuring apparatus capable of surely and accurately measuring a neutron flux. The apparatus counts pulse signals with negative polarity outputted from a neutron detector 1, counts noise pulse signals of positive pol...
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JP3140052B2 |
PCT No. PCT/JP91/00574 Sec. 371 Date Dec. 27, 1991 Sec. 102(e) Date Dec. 27, 1991 PCT Filed Apr. 26, 1991 PCT Pub. No. WO91/17462 PCT Pub. Date Nov. 4, 1991A neutron individual dose meter and a neutron dose rate meter, both capable of im...
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JP3137569B2 |
To evaluate the neutron source intensity and gamma ray intensity in order to precisely grasp the nuclear characteristic in restart of a reactor. In the evaluation of neutron source intensity and gamma ray intensity of a reactor, the reac...
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JP3137622B1 |
To provide an exhaust gas radiation monitor and an exhaust gas radiation monitor system that can continuously analyze nuclides at an early stage, and at the same time, can accurately detect generation of radiation of small nuclides due t...
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JP2001042038A |
To obtain a dosimeter for measuring neutron in which accurate measurement can be ensured with high reproducibility by laying a plastic elastic body, charged particle radiators and a solid for detecting the flight trajectory in layers in ...
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JP2001042048A |
To reduce contribution of the background by surrounding a main neutron detector with a multilayer structure of a neutron absorbing material and a moderator material, and to measure the foreground accurately by providing the structure wit...
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JP2001021654A |
To prevent an erroneous counting due to noise and to perform accurate counting by counting only the detection signal of neutron flux.A signal from a neutron flux detector 1 is amplified by a preamplifier 2, its waveheight is selected by ...
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JP2001013254A |
To easily achieve required sensitivity by simplifying the structure of the detection part of a neutron ray detector.A tabular neutron ray detector 10 is provided with a tabular neutron ray detection part 20 with a flat-surface-shaped neu...
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JP2001004755A |
To precisely measure a dose inside an isolation chamber without moving a detector by a constitution wherein at least four flat sheetlike neutron detectors which are dispersed and arranged at outer faces of the isolation chamber are provi...
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JP3119940B2 |
PURPOSE:To make the improvement of operation stop (trip) response speed possible without any change in processing speed of an inside operation device in the case of monitoring control rods by deciding priority ranking for processing orde...
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JP2000338292A |
To make it possible to insert an inserted tube into which a dosemeter is inserted into a protecting tube at the start of chemical decontamination by making a structure where the inserted tube can be freely attached to and detached from t...
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JP2000329856A |
To calibrate simply a determination device without being restricted by an isotope composition ratio of plutonium, by using a neutron coincidence efficiency calculated theoretically by specific equations from a distribution of the number ...
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JP3112965B2 |
PURPOSE:To solve problems of a fixing space, fixing dimension and the like by detecting different energy of charged particles by the use of one charged particle detector. CONSTITUTION:On an output side of a charged particle exchanger, th...
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JP2000311867A |
To obtain a beam measuring method, which can correctly measure the quantity of an ion beam which also includes the quantity of neutral particles, and a beam measuring device. An electron gun 14 for radiating an electron beam 16 on the pa...
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JP2000304888A |
To inspect and confirm fuel defect, defect position specifying or the like of an inspected MOX fuel assembly in a short time within a fuel rack on the basis of a neutron measurement value of a neutron detector to improve specifying perfo...
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JP3103185B2 |
PURPOSE: To provide a criticality alarm apparatus which can remove external noise and further can inform that the external noise has mixed. CONSTITUTION: A criticality alarm apparatus comprises at least three radiation detectors 11 to 13...
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JP2000258543A |
To enable an operator to verify the soundness of a heater circuit by displaying a measurement result on an operation/display device, comparing it with a preset tolerance, and judging whether a calibration processing as a next step can be...
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JP3085770B2 |
PURPOSE:To enable prevention of degradation of radiation detector and continue monitoring the reactor power even with restriction of bias voltage. CONSTITUTION:When reactor power exceeds a specified power, bias voltage is restricted to m...
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JP3073536B2 |
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JP3071230B2 |
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JP2000206261A |
To miniaturize a detector and reduce its costs as a neutron pocket dosimeter by equipping a converter substance for converting a thermal neutron to a charged particle due to nuclear reaction and a radiator substance for generating a boun...
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JP2000193610A |
To measure the content rate of neutron-absorbing material with simple nondestructive method. A measurement sample S is a board-shaped stainless steel containing neutron absorbing material, such as boron or the like. A polyethylene reflec...
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JP2000187079A |
To improve the strength of the connection part between conductor of an inorganic insulation coaxial cable and an air-tight part. This detector is constituted of a cathode 12 which is spread by neutron conversion material, an anode 13 whe...
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JP2000180557A |
To provide a neutron ray dosimeter with improved energy dependency of sensitivity and improved measurement accuracy.A neutron ray dosimeter is provided with a thermal neutron ray counting circuit 2 including a thermal neutron ray detecto...
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JP3048569B1 |
The invention discloses a neutron beam controlling apparatus comprising a plurality of multilayered plate members 11, in which each of the plate members 11 has on its one or both surfaces one or a plurality of minute protruding portions ...
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JP2000149864A |
To provide a neutron detector equipped with a boron trifluoride gas proportional counter, capable of obtaining a neutron detection sensitivity determined beforehand, while generation of fluorine gas is suppressed. Gas pressure for enclos...
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JP2000147129A |
To make realizable response of dose equivalent by making boron forming a converter layer into particle or powder and attaching a layer in which a hydroxide forming a proton radiator is mixed into boron to a semiconductor detector element...
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JP2000111654A |
To improve reliability in measuring a neutron bundle by measuring/ displaying the pulse number and a pulse wave height discriminating characteristic in parallel while still being put in a normally using operation (for measuring the pulse...
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JP2000105205A |
To determine a water content from an application to drying of a refractory material behind a shell and an attrition state of the refractory material during operation.In this refractory monitoring method, a portion retaining water condens...
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JP2000105204A |
To determine an attrition state of a refractory material behind a shell.In this measuring method, incident fast neutrons collide with light elements in a refractory formation material, are moderated and elastically scattered so that they...
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JP2996680B2 |
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JPH11326584A |
To provide a reactor measuring device measuring the material constitution in reactor fuel from the energy distribution of neutron in a reactor. An output signal ratio measuring part 7 correct the sensitivity of each detector for the dete...
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JP2982036B2 |
PURPOSE:To provide a signal matching method capable of sending with a high accuracy, reactor power value information used for control from a neutron instrumentation device to a reactor power control device in a reactor power control syst...
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JP2977822B1 |
[wrap up] [Task] By making it possible to clearly display the distribution status of how much plutonium powder is accumulated in which part of the glove box, plutonium can be managed accurately, and recovery work can be done quickly and ...
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JP2978106B2 |
To improve the analysis accuracy of a fissile material by eliminating the fluctuation of the measurement value of the fissile material due to a neutron deceleration substance mixed into a radioactive waste. In a conventional active neutr...
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JP2978103B2 |
To eliminate the variation in the measured value of a fissionable material caused by a neutron absorbing material mixed in a radioactive waste and improve the analysis accuracy of the fissionable material. This device is provided with an...
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JPH11304932A |
To obtain a neutron flux monitor which can measure the quantity of a fissionable material accurately. A plurality of gains having values dependent on the composition of a fissionable material are preset in a gain generating means 4 and o...
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JPH11512528A |
The invention relates to a method and apparatus for detecting and identifying fissionable materials from among other transported goods, in which method the material (4) under inspection is irradiated with bremmstrahlung (2) generated by ...
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JP2964891B2 |
PURPOSE: To easily manufacture a neutron-flux detector in which an irregularity in the sensitivity of neutrons is furthermore smaller. CONSTITUTION: The ionization-chamber-type neutron-flux detector is provided with an inside electrode a...
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JP2957439B2 |
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JPH11258385A |
To provide an inspection device and inspection method for a fuel assembly capable of highly efficiently inspecting by assessing a neutron detector on to the inspection object fuel assembly and draining cooling water in a neutron shield a...
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JP2945715B2 |
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JP2941138B2 |
PURPOSE:To simply measure gamma-rays and neutron flux within a nuclear reactor in water by providing an aluminum frame in a hermetically shielded container having the same size as a fuel body and bonding a large radiation quantity measur...
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JP2934513B2 |
PURPOSE:To execute accurate measurement with proper time response and sensitivity by a construction wherein a gamma thermometer and an incore monitor of another type are incorporated in a detector assembly, the gamma thermometer is calib...
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JP2931631B2 |
PURPOSE:To facilitate neutron flux and plateau characteristic measurement by performing the arbitrary plateau measurement by a plateau measurement channel connected through switches to respective plural neutron detectors and provided wit...
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JP2597917Y2 |
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