This section addresses the principles and validation of radiation-based sterilization processes, including gamma and electron beam methods, used for terminal sterilization of medical and pharmaceutical products. It covers dose determination, dose mapping, bioburden assessment, routine dose control, and requalification strategy to ensure consistent sterility assurance in accordance with regulatory expectations.
Radiation sterilization validation for both gamma and electron beam modalities is governed by the same statistical and lifecycle framework defined in ISO 11137. Although gamma systems utilize photon emission from radioactive decay and e-beam systems utilize electrically accelerated electrons, the validation philosophy, dose substantiation methodology, and lifecycle control expectations are identical. This article addresses validation…
Electron beam sterilization is a terminal sterilization method that uses high-energy electrons generated by an accelerator to deliver a defined absorbed radiation dose to product. The objective is achievement of the required Sterility Assurance Level, typically 10⁻⁶, through controlled ionizing radiation exposure. Unlike gamma sterilization, which relies on continuous radioactive decay from Cobalt-60, e-beam systems…
Gamma sterilization is a terminal sterilization method that uses ionizing radiation emitted from Cobalt-60 sources to deliver a validated absorbed dose to product. The objective is to achieve a defined Sterility Assurance Level while preserving product integrity. In the vast majority of cases, gamma sterilization is performed by specialized contract irradiation facilities. Ownership and control…
