Lifetime extension of optically stimulated luminescent dosimeters above 10 gy

•Systematically evaluated how TG-191 factors change with accumulated dose.•Dose-nonlinearity correction factor changes linearly with accumulated dose.•No change in element sensitivity correction factor with accumulated dose.•OSLDs can be used up to 23 Gy with the irradiation and bleaching scheme at IROC.•OSLDs can be reused to higher dose limits with well characterized factors.