23 research outputs found
Approaches to rehabilitation of radioactive contaminated territories
Full text linkBACKGROUND: Accidents at nuclear fuel cycle plants may lead to contamination of areas of land and water. Cheap and available sorbents including natural aluminosilicates can be used for rehabilitation and decontamination of large volumes of radioactively contaminated water, including drinking water, prevention of migration of radionuclides into ground and surface waters through the soil and returning contaminated soil to farming. RESULTS AND DISCUSSION: A comparative study of sorption properties of various natural and surface-modified aluminosilicates with respect to caesium is made. It is shown that sorption features of surface-modified aluminosilicates for Cs were improved by 100-1000 times compared with respective natural aluminosilicates. It is shown that surface modification of glauconite by a mixed nickel-potassium ferrocyanide phase allows it to considerably increase its specificity (caesium distribution coefficients (2.9 ± 0.8)Ч103 mL g-1 for natural and (4.5 ± 0.5)Ч105 mL g-1 for modified glauconite) as well as making it selective to caesium in the presence of other alkaline ions and also provides irreversible caesium sorption. CONCLUSIONS: Due to improved features, modified aluminosilicates can be more successful than natural ones when used for rehabilitation of radioactive contaminated territories (including agriculture) and water areas, as well as for decontamination of liquid radioactive wastes and for creation of geochemical barriers in solid radioactive waste storage. © 2013 Society of Chemical Industry
Examining the possibilities of using ultrasonic inspection for detecting oxide films in welded joints in aluminium alloys
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Using Rayleigh waves for the active inspection of high-frequency welding of pipes
No full textTranslated from Russian (Tekhnicheskaya Diagnostika i Nerazrushayushchii Kontrol' 1996 (4) p. 16-23)Available from British Library Document Supply Centre-DSC:9023.190(VR-Trans--8713)T / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo
Semiconductor Physics, Quantum Electronics & Optoelectronics, 23 (1), P. 71-74 (2020). DOI: https://doi.org/10.15407/spqeo23.01.071 Pyroelectric USB-joulemeters of pulsed laser radiation V.B. Samoylov, L.V. Levash, O.A. Rosnovskiy, M.Yu. Vedula, V.S. Rad'ko Institute of Physics, NAS of Ukraine, 46, prospect Nauky, 03680 Kyiv, Ukraine E-mail: [email protected] Abstract. The general arrangement, principle of operation and basic parameters of pyroelectric USB-meters of energy of pulsed laser radiation have been described. A smart head of the meter converts the signal from the pyroelectric sensor and immediately transfers it to PC using a high-speed USB 2.0 connection. The device consists of two circuit panels located in the common package. The pyroelectric sensitive element and preamplifier are mounted on the sensor panel. Output of the preamplifier is connected with input of the preliminary digital processing panel. The meter is connected with host computer that performs further processing, storage and monitoring of data. Sensor panel can be produced in two modifications, dependently on the pulse energy. Sensitive elements on the base of LiNbO3 or LiTaO3 with absorbing coatings are used for measuring the low-energy pulses, whereas the transparent sensitive elements with a small intrinsic absorption is used for measurements of high-energy radiation pulses. The pulse rate and pulse energy can vary from single pulses up to 2 kHz and from 0.1 μJ up to 0.5 J, respectively. Keywords: laser, impulse radiation, joulemeter, detector, pyroelectric. Full Text (PDF) Back to Volume 23 N1 Creative Commons License This work is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License.
No full textA system for ultrasonic inspection of the quality of welded joints and detecting defects with low reflectivity
No full text20.00; Translated from Russian (Tekhnicheskaya Diagnostika i Nerazrushayushchii Kontrol' 1989 v. 1(4) p. 54-57)SIGLEAvailable from British Library Document Supply Centre- DSC:9023.19(VR-Trans--4466)T / BLDSC - British Library Document Supply CentreGBUnited Kingdo
