Abstract: A preservation system (2) for cadavers and the like. A chamber (6) is defined by walls (4) which are of sufficient thickness to block gamma irradiation from a gamma source (20) therein. The gamma source is placed in a conveyor system (32) and moved around a cadaver in the chamber, killing microorganisms therein, and returned to a storage area (14). A bagging system (35) seals the cadaver after irradiation.