Buoyancy in Nuclear Process Measurements

The role of the application of buoyancy corrections to weighings in process measurements is investigated and discussed. The form of buoyancy corrections and their application to weighing on an electronic balance and on a single-pan directweighing analytical balance are presented and analyzed. The definition and application of the concept of apparent mass are discussed, stressing that it is the true mass of an object or material that is the desired quantity in many process measurements. The extremes of the values of buoyancy corrections and errors possible due to variations in air density and in the density of the object or material being weighed are discussed. Examples of the magnitude of the buoyancy correction for process measurements and the necessity of making the buoyancy correction are given.