Neutron flux measurement apparatus
AssigneeMitsubishi Electric Corporation
InventorsTetsushi Azuma, Makoto Sasano
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Abstract
A neutron flux measurement apparatus includes: a storage which records, as record data, a measured value indicating change in a neutron flux in a nuclear reactor corresponding to adjustment control for output of the nuclear reactor during a first set period; and a calculation circuitry which, on the basis of the record data, performs correction for a detector sensitivity to a neutron of a self-powered detector at a time point in accordance with the adjustment control during a second set period after the first set period, the time point being a time point when the second set period has elapsed, and derives the neutron flux at the time point using the corrected detector sensitivity.
Claims21
A neutron flux measurement apparatus comprising:
- a self-powered detector which detects a neutron in a nuclear reactor;
- a neutron flux counting circuitry which measures a neutron flux in the nuclear reactor on the basis of output of the self-powered detector;
- a storage which records, as record data, a measured value indicating change, during a first set period, in the neutron flux in the nuclear reactor corresponding to adjustment control for output of the nuclear reactor;
- and
- a calculation circuitry which, on the basis of the record data, performs correction for a detector sensitivity to a neutron of the self-powered detector at a time point t1 in accordance with the adjustment control during a second set period after the first set period, the time point t1 being a time point when the second set period has elapsed, and derives the neutron flux at the time point t1 using the corrected detector sensitivity.
A neutron flux measurement apparatus comprising:
- a self-powered detector which detects a neutron in a nuclear reactor;
- a neutron flux counting circuitry which measures a neutron flux in the nuclear reactor on the basis of output of the self-powered detector;
- a storage which records, as record data, a measured value indicating change in the neutron flux in the nuclear reactor corresponding to adjustment control for output of the nuclear reactor during a first set period;
- and
- a calculation circuitry which, on the basis of the record data, performs correction for a detector sensitivity to a neutron of the self-powered detector at a time point t1 in accordance with the adjustment control during a second set period after the first set period, the time point t1 being a time point when the second set period has elapsed, and derives the neutron flux at the time point t1 using the corrected detector sensitivity, wherein
- the calculation circuitry
- estimates a time interval Δtc in which a count of the neutron flux in the nuclear reactor changes corresponding to the adjustment control for the nuclear reactor during the second set period, on the basis of the record data, and
- adjusts a measurement interval Δt of the neutron flux counting circuitry during the second set period on the basis of the time interval Δtc, to perform correction for the detector sensitivity of the self-powered detector at the time point t1.
Dependencies are inferred from the claim text.