Cs⁺ captured fly ash filter waste from pyro-processing was immobilized by alumino-borosilicate glass waste form. Produced glass specimens were irradiated by electrons in order to simulate the beta irradiation during the storage and disposal. Density, glass transition temperature, Vickers hardness and linear thermal expansion coefficient of pristine and irradiated glasses were measured. All of measured glass properties were similar to that of commercial HLW glass waste forms. Chemical durability of glass waste form was evaluated by a product consistency test (PCT) and normalized release mass values were well below the regulatory limitation. Magnetic resonance spectroscopies (EPR, MAS NMR) were used to identify the electron irradiation induced paramagnetic defects and structural evolution of network formers. It was seen that E’ and Si-O, B-O related defects were created. Structure of Si and Al networks were rarely influenced by electron irradiation. However, modification of B network was forced by irradiation and boron coordination number was increased. Work on thermal stability of a full size canister for glass waste form was supported by thermal modeling. The maximum temperature of glass waste form will not going to higher than glass transition temperature during an accident and preserve the glass performance.