Abstract :
One of the most investigated heat transfer fluid or heat storage medium in the field of thermal solar conversion is the ‘‘solar salt”, a
mixture of nitrates NaNO3/KNO3, 60/40% by weight, respectively. The content of potassium in this fluid allows exploiting the self activity
of the isotope 40K to perform measurements useful for control or diagnostics of a solar plant. Here an experimental test on the noninvasive
measurement of the salt level in a tank by means of gamma-ray spectrometry is shown.
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