Instant Release of14C,99Tc,90Sr and137Cs from Used Candu Fuel at 25°C in Distilled Deionized Water

Abstract

ABSTRACTInstant-release fractions were measured for release of14C,99Tc,90Sr and137Cs from segments of clad used CANDU fuels in distilled deionized water at pH 8.5 and 25°C. Measured–instant release values, 0.002 to 0.07% for14C, 0.001 to 0.23% for99Tc and 0.0005 to 0.04% for 9 0 Sr, were one to two orders of magnitude lower than the estimated values currently used in the safety assessment of the Canadian concept of geological disposal of intact used CANDU fuel. The values for14C were also lower than values reported in the literature for PWR fuels.