Time differential perturbed angular correlation (TDPAC) and Extended X-ray absorption fine structure (EXAFS) studies have been carried out on electron beam (EB) irradiated sodium borosilicate (NBS) and simulated waste oxide loaded sodium borosilicate (SNBS) glasses with a view to investigate the effect of self β-irradiation in vitrified high level waste. NBS and SNBS glasses were synthesized and doped with 1.5% HfO₂. For TDPAC studies the glasses were doped with ¹⁸¹Hf probe, while for EXAFS studies measurements were carried out at and around Hf L_III edge. TDPAC and EXAFS acquisition were performed before and after electron beam irradiation doses up to 10 MGy for both NBS and SNBS glasses. Fourier transforms of the TDPAC spectra show broad frequency distribution reminiscent of the disordered glass matrix, with increase in hyperfine interaction frequency in irradiated glasses with respect to unirradiated ones as well as with increasing EB dose. On the other hand, the width of the frequency distribution was found to decrease with EB dose. No change in asymmetry of the electric field gradient was observed in irradiated glasses with respect to unirradiated ones. These observations indicate that while there is no indication of appearance of micro-crystallinity in the glasses up to EB dose of 10 MGy, local structural changes around Hf do take place with EB irradiation in both the glasses. No change in metric parameters (Hf-O bond distance and coordination number of Hf) was observed from EXAFS measurements on both NBS and SNBS glasses up to EB dose of 10 MGy.