Patent ID: 9395227
Filing Date: 2016-07-19
CPC Classification: G01F,G21C,Y02E

Claim Text:
1. A reactor water-level measurement system comprising: a core bottom water-level measuring device that includes a heating element, a heat insulating element installed by surrounding part of the heating element in a height direction of the heating element, and a temperature difference measuring element that measures a temperature difference between an insulated portion of the heating element surrounded by the heat insulating element and a non-insulated portion not surrounded by the heat insulating element; a water-level evaluation device that evaluates a water level of a reactor based on the temperature difference, wherein the core bottom water-level measuring device measures at least a water level from a lower end of a reactor core contained in a reactor pressure vessel to a bottom of the reactor pressure vessel, and wherein the reactor pressure vessel includes a neutron detector that monitors neutron fluxes in the reactor core and a protective tube that contains the neutron detector, and wherein the core bottom water-level measuring device is contained in the protective tube together with the neutron detector.