“…Many papers deal with the measurements of 14 C in environmental or biological samples [10] but a very few in nuclear waste [8,14]. The major difficulty of 14 C determination in radioactive waste deals with its complete extraction from the matrix, especially for steel samples [6,8,14,[27][28][29] and the elimination of volatile interfering radionuclides such as 3 H, 129 I, 99 Tc or 35 S before LSC analysis. In agreement with the literature, two methods (e.g.…”