Title: Preparation and certification of IRMM-1027m; Large-Sized Dried (LSD) spike
Publisher: Publications Office of the European Union
Publication Year: 2009
JRC N°: JRC56170
ISBN: 978-92-79-14589-6
ISSN: 1018-5593
Other Identifiers: EUR 24119 EN
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC56170
DOI: 10.2787/22052
Type: EUR - Scientific and Technical Research Reports
Abstract: Large size dried spikes (LSD) have become a fundamental part of the fissile material control of irradiated nuclear fuel. In the frame of providing these spikes to the nuclear industry, a new set of LSD Spikes for the determination of uranium and plutonium by isotope dilution mass spectrometry in solutions of spent fuel from reprocessing plants has been prepared and certified for uranium and plutonium isotopic contents. The methodology followed was comparable to that or previous batches. The solution, made by dissolution of the starting materials in nitric acid, was dispensed directly into individual penicillin vials. As in previous campaign an automated system was introduced to dispense and weigh the vials. The new batch of large size medium dried spikes contains ca 50 mg of uranium (235U amount fraction = 0,195) and ca 1,8 mg of plutonium (235Pu amount fraction = 0,978) in each individual vial, covered with a light layer of organic material (cellulose acetate butyrate) as stabiliser. The U and Pu amount content was certified based on values from mass metrology of the validated automated system. Verification of the amount contents of the spike was done by IDMS at IRMM. The values measured for the dried covered spikes agreed well with those calculated from the weights of starting materials dissolved and the weights of the final solution
JRC Directorate:Health, Consumers and Reference Materials

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