Uranium, Uranium Alloys, and Uranium Compounds

Peehs, M.; Walter, Thomas H.; Walter, Sabine

doi:10.1002/14356007.a27_281

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Results Discussion and Evaluation1

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2012

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“…We find a more or less constant value in all samples (average 12.7 ± 2.0 mBq/g, corresponding to around 1-1.5 ppm given in the literature [16]). The plutonium is produced in nuclear reactions with secondary neutrons.…”

Section: Results Discussion and Evaluationsupporting

confidence: 64%

Radiochemical analysis of concrete samples from accelerator waste

Schumann¹,

Kiselev²,

Teichmann³

et al. 2012

Radiochimica Acta

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For the decommissioning and disposal of shielding concrete from accelerator facilities, the Swiss Authorities require information on the radionuclide inventory. Besides the easy-to-measure γ-emitters 152Eu, 60Co, 44Sc, 133Ba, 154Eu, 134Cs, 144Ce, 22Na, also long-lived radionuclides emitting α- or β-radiation like 129I, 10Be, 36Cl, 239/240Pu and 238U have to be studied in order to obtain an overview to which extent they are produced and whether they represent a safety issue. In this study, we present the chemical separation and determination of selected radionuclides in shielding concrete from two different positions in the accelerator facilities at the Paul Scherrer Institute (PSI), the BX2 station, which was shut down in 1998, and the environment of the target M station, where the samples were taken in 1985 during reconstruction. The results of the measurements show that in no case the radionuclide content represents a safety risk. The components can be decommissioned corresponding to the Swiss safety regulations.

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Section: Results Discussion and Evaluationsupporting

confidence: 64%