Absorption of Radiation in Photo-CREC Water-II Reactor

DETERMINATION OF ABSORPTION OF RADIATION IN PHOTO-CREC WATER-II REACTOR 

The determination of the radiation absorption can be accomplished in a Photo-CREC Water-II Reactor. An experimental method for the determination of the rate of photon absorption is described in detail in this section. Tliis experimental method corresponds to a semi-empirical technique of moderate complexity that combines spectroscopic measurements with modeling to obtain sufficient infonnation for the determination of the radiation field distribution in photocatalytic reactors. The radiation absorbed is determined by the use of the Beer-Lambert equation with effective extinction coefficients obtained from spectroscopic measurements. A physical interpretation of these coefficients is also provided later in this chapter. 

Radiation measurements are taken at several axial positions in Photo-CREC Water-II using UV-opaque collimators and UV-reflecting collimators. These collimators allow (Chapter III) the determination of average values of the radiation transmission in the 

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