Nuclear fuel technology. Chemical separation and purification of uranium and plutonium in nitric acid solutions for isotopic and isotopic dilution analysis by solvent extraction chromatography-Samples containing plutonium and uranium in the nanogram range and below
核燃料技术 硝酸溶液中铀和钚的化学分离和纯化 通过溶剂萃取色谱法进行同位素和同位素稀释分析 含有纳克及以下钚和铀的样品
BS EN ISO 15366-2:2016 describes procedures to chemically separate and purify uranium and plutonium
in dissolved solutions of irradiated light water reactor fuels and in samples of high active liquid waste
of spent fuel reprocessing plants, prior to their isotopic analysis by e.g. mass spectrometric method
(see ISO 8299[1]) or alpha spectrometry (see ISO 11483[2]). This part of ISO 15366 describes a slightly
different separation technique from ISO 15366-1, based on the same chemistry, using smaller columns,
different support material and special purification steps, applicable to samples containing plutonium
and uranium amounts in the nanogram range and below. The detection limits were found to be 500 pg
plutonium and 500 pg uranium. Annex A describes the preparation of the columns and the column
support materials.In comparison with ISO 15366-1, as uranium and plutonium amounts are lowest, additional purification
on an anion exchange resin is performed.Cross References:ISO 8299ISO 11483Incorporates the following:Corrigendum, June 2016