Device for measuring the power of a nuclear reactor and method for producing such a device

摘要

A device for measuring the power of a nuclear reactor, having a sensor subassembly arranged in a core section inside the nuclear reactor. The sensor subassembly comprises a sleeve pipe (17) made of metal, which is seated with a press fit on the outer surface of a rod-shaped core pipe (18) made of metal, a plurality of annular interspaces (21), which are defined between the sleeve pipe (17) and the core pipe (18) at various locations spaced apart from each other in the axial direction of the core pipe, a plurality of axial channels (23), which are formed in the core pipe, are open to the outer surface of the core pipe and extend in the axial direction of the core pipe, and a plurality of temperature sensors, which are guided individually in the axial channels (23) and are arranged on the core pipe. The temperature sensors (25) of the sensor subassembly determine the temperature distribution in regions of the core pipe (18) which face the annular interspaces (21), so that the power of the nuclear reactor is measured. By means of the construction described, the device can be produced simply, has a high temperature measuring accuracy and a sufficiently high reliability to avoid problems such as an interruption and an insulation fault. <IMAGE>