Helical gear reducers H4 on request Centrifugal compressors Cable rail H4FV-24-C

Flender/Flender Gear Units/Helical gear reducers H4

lants are suitable for large volumes, leading to signicant economy of scale and lower labor cost. In continuous facilities, the exposure time is controlled by regulating the speed of the transport mechanism. Figure 3 shows carrier-type irradiator installed at the Canadian Irradiation Centre (CIC). 4 MEASUREMENT OF THE IRRADIATION TREATMENT Measuring the irradiation dose is known as dosimetry . The three main purposes of dosime- try in food irradiation are () to develop the proper dose for the food commodity under research, () to obtain data for commissioning the food product through the regulatoryagency, and () to establish the quality control procedure in the food production plant. Itis also used to determine the conguration of the irradiation eld after the installation ofthe irradiator or any changes that occurred in the irradiation facility. McLaughlin andassociates ( have reviewed in detail the technical aspects of dosimetry. In general, experimental dosimetry is preferred to calculation methods. Dosimeters are placed within the food product being irradiated to measure the distribution of theabsorbed energy and to determine the maximal and minimal doses absorbed by the food.The measurement of the absorbed dose must be as accurate as possible to establish correctprocedures for food preservation and quality control in irradiation processing. The choiceof dosimeter is mainly dependent upon () its reliability for calibration and standardiza-tion; () its reproducibility at all specied dose levels; () its limited dependence on pro- cess conditions (.., radiation spectra, dose rate), () its capacity for correction for system- atic errors caused by environmental factors (.., humidity, temperature, light effects), ()its degree of equivalence to the food product, () its commercial availability at low cost,and () its ease of handling. Primary or reference dosimeters (.., calorimeters) are used 6 Lacroix et al. to calculate the amount of energy absorbed or the dose di