Apparatus for measuring power of nuclear reactor and method for manufacturing the same

Abstract

An apparatus for measuring the power of a nuclear reactor having a sensor assembly disposed in a core section inside the nuclear reactor. The sensor assembly includes a cover tube made of metal and press-fitted on the outer surface of a rod-shaped core tube made of metal, a plurality of annular gaps defined between the cover tube and the core tube at different positions spaced from each other in the axial direction of the core tube, a plurality of axial grooves formed in the core tube while opening on the outer surface of the core tube and extending in the axial direction of the core tube, and a plurality of temperature sensors individually guided in the axial grooves and disposed on the core tube. The temperature sensors of the sensor assembly detect temperature distribution in portions of the core tube which face the annular gaps so as to measure the power of the nuclear reactor. By virtue of the above construction, the apparatus can be manufactured easily, has high precision of temperature measurement, and has a sufficiently high reliability for reducing problems such as disconnection and insulation failure.

Dependencies are inferred from the claim text.