Patent Number: 053655540
Section: claims

1. An instrumentation probe for use in the on-line measurement and recording of one or more physical parameters within a nuclear reactor fuel channel, without connection to external instrumentation, said instrumentation probe comprising: an elongate support frame for being mounted within the fuel channel, and measuring and recording means mounted on the frame, said measuring and recording means comprising 2. An instrumentation probe according to claim 1, wherein the speed reducing mechanism is a gear reduction train having an input shaft and an output shaft, the recording chart comprising a rotary drum mounted on the output shaft. 3. An instrumentation probe according to claim 1, wherein the support frame is configured as a cylindrical cage having perforate end plates. 4. An instrumentation probe according to claim 3, wherein the support frame is configured to simulate a fuel bundle of the reactor. 5. An instrumentation probe according to claim 4, wherein the cylindrical cage comprises an array of fuel pencils extending longitudinally between the end plates, the array of fuel pencils being distributed symmetrically around a longitudinal axis and defining an axially extending internal space wherein said measuring and recording means are mounted. 6. An instrumentation probe according to claim 5, wherein at least some of the fuel pencils are dummy pencils.