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Facility for Removal and Determination of Labile Tritium

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Tuta C., Postolache C., Fugaru V., Bubueanu G., Manea S., Bercea S.
Acta Physica Polonica A
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2015
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vol. 127
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issue 4
895-897
EN
Tritium bonded to electrophilic atoms like O, S, N or halogens can spontaneously exchange places with hydrogen from the water. These tritium species are exchanged even at a very low temperature and have the generic name `labile'. In this paper, a new facility for the removal and quantitative determination of labile tritium is shown. The working principle is as follows: tritium sources are brought in contact with protic solvent, leading to a spontaneous exchange of labile tritium, then the obtained tritiated solvent is extracted by distillation. The new facility was tested for removal efficiency of labile tritium from labeled compounds and wastes with different compositions.
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Gamma Ray Shielding Properties of Some Concrete Materials

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Fugaru V., Bercea S., Postolache C., Manea S., Moanta A., Petre I., Gheorghe M.
Acta Physica Polonica A
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2015
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vol. 127
|
issue 4
1427-1429
EN
Concrete of various type have been used extensively for the adequate shielding of the radiological equipment using X and gamma rays. In its basic form, concrete is composed of pieces of inert aggregate held together by hardened cement paste. Different concrete types with special cements have been prepared. The linear attenuation coefficients of conventional concrete and concrete with supplementary mineral additives (barite and witherite) at different gamma energies (Co-60: 1.25 MeV, Cs-137: 0.662 MeV, Ir-192: 0.37 MeV) in narrow beam conditions have been measured. This paper includes some experimental data regarding the influence of barite and witherite additives on photon attenuation coefficients of concrete.
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