Lu ACCUMULATION PARAMETERS IN DIFFERENT NUCLEAR REACTORS

A computational study of [sup.177]Lu production in the neutron spectra of 26 nuclear research reactors was per formed by two methods: from [sup.177]Lu and [sup.176]Yb. It is shown that the production of Lu from Lu with satisfactory specific activity ~7.4 x [10.sup.5] GBq/g and higher can be accompli...

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Bibliographic Details
Published in:Atomic energy (New York, N.Y.) N.Y.), 2019-04, Vol.125 (6), p.376
Main Authors: Tikhonchev, M.Yu, Svetukhin, V.V, Novikov, S.G, Bil'danov, R.G, Il'in, K.I
Format: Article
Language:English
Subjects:
Nuclear facilities
Nuclear industry
Nuclear reactors
Nuclear research
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Summary:A computational study of [sup.177]Lu production in the neutron spectra of 26 nuclear research reactors was per formed by two methods: from [sup.177]Lu and [sup.176]Yb. It is shown that the production of Lu from Lu with satisfactory specific activity ~7.4 x [10.sup.5] GBq/g and higher can be accomplished only in reactors with thermal neutron flux density not less than [10.sup.14] [sec.sup.-1] x [cm.sup.-2]. Under long-duration irradiation, not only is the specific activity of the desired isotope reduced but the contribution of [sup.177m]Lu in the activity increases, as a result of which the quality of the final product is lowered. The accumulation of [sup.177]Lu from [sup.176]Yb makes it possible to obtain high specific activity in all research reactors and requires using targets with high enrichment with [sup.176]Yb and minimum content of [sup.174]Yb. In addition, most importantly, the specific activity decreases under irradiation in reactors with high thermal neutron flux density, first and foremost, in SM and HFIR research reactors.
ISSN:1063-4258
1573-8205
DOI:10.1007/s10512-019-00497-2