Monitoring the plutonium depletion in dissolution residues of a spent fuel solution using a surrogate and plutonium isotope ratio measurements

Irradiated UAmO2 transmutation discs analyses: from dissolution to isotopic analyses

“…Total evaporation method 235 U/ 238 U, Pu, Am and Nd isotope ratios were measured using the TE method previously described [14,[17][18][19]. In a nutshell, the TE method is divided in 3 phases: adjustment, acquisition and shutdown phases.…”

“…The 238 Pu/ 238 U ratio is 0.04887 (18) for the DIAMINO disc and 0.07980 (30) for the MARIOS disc. The repeatabilities are below 0.1 % for both disc.…”

“…Therefore, the ion beam of the element is totally collected by a multi-collection system. This method is barely affected by the isotope fractionation and was successfully applied to U, Pu, Am or Nd [14,[17][18][19].…”

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

“…The 240 Pu/ 239 Pu ratio was measured by Quemet using TIMS in dissolution residues of a spent fuel solution. 184 Repeatability of better than 83 ppm was achieved in each aliquot, with interpretation of the kinetic evolution that could not be reached by conventional direct concentration measurement.…”

Nd, Am and Cm isotopic measurements after simultaneous separation in transmutation irradiated samples

“…This ratio is slightly above the detection limit estimated at 3.10 -5 . If we consider the 241 Pu/ 239 Pu ratio measured during the Pu isotope ratios determination 35 (about 0.002 for DIAMINO disc and 0.01 for MARIOS disc), the contribution of the 241 Pu isotope to the signal measured at mass 241 can be estimated to be below 0.001 % and is negligible compared to the repeatability (RSD = 0.02 % for DIAMINO disc and RSD = 0.06 % for MARIOS disc). Similarly, it is possible to estimate the contribution of the 242 Pu isotope to the signal measured at mass 242.…”