THEORETICAL EVALUATION OF COMBINED IRRADIATION AND THERMAL PROCESSES IN CYLINDRICAL CONTAINERS WITH GAMMA SOURCES

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Abstract
SUMMARY —A digital computer technique is presented for studying combined effects of heat and radiation in food sterilization, using steam retorts and cylindrical gamma sources. Temperature and dose rate distributions in cylindrical containers are computed using numerical methods. Distributions due to preliminary treatments–survivor and degree of spore sensitization–are inputs to subsequent treatment. The heat‐radiation sequence was studied using data available, which indicates no synergism. This additive combination served as control to demonstrate synergism for radiation‐heat sequence. Synergy, as influenced by irradiation exposure time, source strength, thermal process time and retort temperature was studied.

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