Neutron monitoring system
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United States of America Patent
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Sep 13, 2016
Grant Date -
Dec 11, 2014
app pub date -
Jun 9, 2014
filing date -
Jun 10, 2013
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Abstract
A neutron monitoring system for a nuclear reactor can correct measured neutron flux by taking into consideration neutron moderation based on whether a neutron detector is fully immersed in coolant water or exposed above the water level. The neutron detector and a water detection sensor are mounted at the same height in the nuclear reactor. The water detection sensor includes a thermocouple and a heating element positioned to heat the thermocouple. A temperature measuring component is connected to the thermocouple. A water existence determining component can determine, based on temperature measured by the temperature measuring component, whether the water detection sensor (and thus the neutron detector) is underwater. A correction component can correct a neutron detection signal from the neutron detector in accordance with whether the neutron detector is below or above the water level.
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