METHOD FOR CONTINUOUS MAINTENANCE OF STABILITY OF MEASUREMENTS OF SPECTROMETER CHANNEL FOR CONTROLLING UNIFORMITY OF DISTRIBUTION OF FUEL IN FUEL ELEMENT BY GAMMA-ABSORPTION METHOD Russian patent published in 2016 - IPC G01T1/40 G21C17/06 G01N9/24 

FIELD: nuclear industry.

SUBSTANCE: invention relates to nuclear industry and can be used for controlling uniformity of distribution of fuel in fuel elements by gamma-absorption method using a scintillation spectrometer. Method for continuous maintenance of stability of measurements of a spectrometer channel comprises detecting flux density of gamma-radiation from an external source, passed through limited areas of holders on a standard sample of fuel element and on controlled fuel element during movement thereof along longitudinal axis of standard sample/fuel element. Measured flux density of gamma-radiation is converted by means of spectrometer into sequence of electric pulses and value of pulse counting rate on holders and on fuel column of fuel element in each point of PTS spectrum. Method includes determining correction factor, calculating and recording value of reduced count rate PTSpriv for fuel column of fuel element in each point of spectrum.

EFFECT: technical result is providing automatic adjustment of readings of spectrometer channel by taking into account background gamma-radiation.

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