APPARATUS AND METHOD FOR MEASURING NEUTRON SOURCE DISTRIBUTION
PROBLEM TO BE SOLVED: To enable accurate measurement of neutron source distribution in a substance under measurement that contains burnt nuclear fuel.SOLUTION: According to an embodiment, a neutron source distribution measurement apparatus 100 includes: an external neutron source 14 that generates n...
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Main Authors | , , , |
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Format | Patent |
Language | English Japanese |
Published |
01.12.2016
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Subjects | |
Online Access | Get full text |
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Summary: | PROBLEM TO BE SOLVED: To enable accurate measurement of neutron source distribution in a substance under measurement that contains burnt nuclear fuel.SOLUTION: According to an embodiment, a neutron source distribution measurement apparatus 100 includes: an external neutron source 14 that generates neutrons; a neutron source drive unit 16 capable of moving the external neutron source 14 to a close-by position in the proximity of a substance 1 under measurement containing burnt nuclear fuel and to a retreated position away from the substance 1 under measurement; one or more neutron detectors 11 that are disposed in the proximity of the close-by position to measure neutrons from the substance 1 under measurement; and a computation unit configured to receive outputs of the neutron detectors 11 when the external neutron source 14 is at the close-by position with respect to the substance 1 under measurement, outputs of the neutron detectors 11 when the external neutron source 14 is at the retreated position, and measurement point position information, to compute a distribution of relative values si of internal neutron source strength of the substance 1 under measurement.SELECTED DRAWING: Figure 1
【課題】燃焼した核燃料を含む物質である測定対象物質中の中性子発生源の分布状態を精度よく測定する。【解決手段】実施形態によれば、中性子源分布測定装置100は、中性子を発生する外部中性子源14と、外部中性子源14を燃焼した核燃料を含む物質である測定対象物質1に近接した近接位置と、測定対象物質1から離れた後退位置とに移動可能な中性子源駆動部16と、近接位置の近傍に設けられて、測定対象物質1からの中性子を測定する少なくとも一つの中性子検出器11と、測定対象物質1において外部中性子源14が近接位置の場合の中性子検出器11の出力と、外部中性子源14が後退位置の場合の中性子検出器11の出力と、測定点の位置情報とを受けて、測定対象物質1の内部中性子源強度相対値siの分布を算出する演算部と、を有する。【選択図】図1 |
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Bibliography: | Application Number: JP20150078700 |