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Published in last 50 years
以上,国土地理院が整備した航空測量用カメラ性能測定装置について説明した.国土地理院では,昭和54年以来,各種の航空カメラについて上記装置を用いて性能測定試験を行ってきたが,今後より精度の高い測定手法の開発を行っていく所存である.
A monitor has been designed to detect the absence of a fuel bundle from its position in a storage basket. In addition, a signal is obtained which can be compared with the recorded irradiation and storage history of the fuel. The detectors are silicon diodes mounted in an array of lead collimators to view each bundle in a 4 × 4 array. Test results are presented which show that the absence of a bundle can be reliably detected. For spent bundles removed from the reactor at the same time, the output currents from the signal diodes are linearly related to the irradiation of the fuel.