[en] Co-60 sources represent one of the key factors in industrial radiation processing and applications such as sterilization of disposable products and food preservation. Design of the sources being currently used in wet gamma irradiators can be improved with the purpose of increasing the source corrosion stability and mechanical integrity during use. This paper describes the proposed new design of Co-60 source for wet gamma irradiators. As a result of changes in capsule material and some dimensions, product quality and reliability can be improved with no additional cost for end user