A new Certified Reference Material of CETAMA: its certification approach
1 CEA, DEN, DRCP, CETAMA, F-30207 Bagnols-sur-Ceze, France
2 CEA, DEN, DRCP, F-30207 Bagnols-sur-Ceze, France
3 CEA, DEN, DRCP, SERA/LAMM/LAMMAN, F-30207 Bagnols-sur-Ceze, France
a Corresponding author: Corinne.email@example.com
To meet a need expressed by the French nuclear laboratories, the Commission for the Establishment of Analytical Methods (CETAMA) has provided a new reference material with high level in plutonium isotope 242Pu and certified in isotopic ratio. Based on the ISO guide 34, the production of this material by LAMMAN laboratory (Metrology Laboratory of Nuclear Material) in CEA Marcoule has been made from a solution of plutonium nitrate enriched in 242Pu. The certification process has been undertaken by interlaboratory comparison in collaboration with five French and European laboratories. The method of mass spectrometry thermal ionization (TIMS) was recommended as the analytical technique for certification. The statistical processing of the data provided by the laboratories has been done by four different approaches. The “excess-variance” approach has proved to be the best to process these data. After determining certified values and their associated uncertainties, a certificate has been established for this new reference material 242Pu.
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