Wyniki wyszukiwania - BazTech

1

Industrial diagnostics system using gamma radiation

Jakowiuk A., Modzelewski Ł., Pieńkos J., Kowalska E.

Nukleonika

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2015

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Vol. 60, No. 3, part 2

633--636

EN

During the operation of large industrial installations, a very important task is to maintain the proper technical state. In the event of an emergency, it is vital to locate the place of occurrence as soon as possible. In solving this type of problem, it often helps to apply the methods of measurement associated with ionizing radiation. One of these methods is the gamma scanning. The purpose of this type of measurement is the detection and localization of disturbance of technological processes which may result in incorrect decomposition the flowing medium and workpiece (sediments, congestion) as well as damage to the internal constructions. A particularly: (i) preventive diagnosis – early detection of installation failure; (ii) rationalization of repairs and renovations – to determine the need to take or not to take remedial action; (iii) quick and precise installation inspections – to gain knowledge of the technical condition and technological installations; (iv) indication of worn parts and posing a threat – diagnostics of the technical condition installation; (v) forecasting the useful lifetime of equipment.

2

Systemy detekcji skażeń promieniotwórczych opracowane w Instytucie Chemii i Techniki Jądrowej

Jakowiuk A., Pieńkos J., Kowalska E., Modzelewski Ł.

Postępy Techniki Jądrowej

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2014

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z. 3

15--18

3

Badania procesu fermentacji metanowej z wykorzystaniem metod radioznacznikowych i technik gamma skaningu

Palige J., Roubinek O., Wawryniuk K., Modzelewski Ł, Jakowiuk A., Dobrowolski A., Drewniak Ł., Ciężkowska M

Inżynieria i Aparatura Chemiczna

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2014

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Nr 4

280--281

PL

Określono metodami radioznacznikowymi, z wykorzystaniem trytu jako znacznika fazy ciekłej, rozkład czasu przebywania i średni czas retencji zawiesiny w bioreaktorach do produkcji biometanu. Wykorzystując technikę gamma skaningu określono objętość czynną fazy ciekłej, gazowej oraz obszar tworzenia się kożuchów.

EN

The residence time distribution and mean residence time of liquid phase in fermentor was determined using the tritium water as a radiotracer. With application of gamma scanning technique the volumes of liquid phase and foam in bioreactor were determined.

4

Wireless system for radiometric measurements

Jakowiuk A., Pieńkos P. J., Kowalska E., Filipiak P., Świstowski E.

Nukleonika

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2012

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Vol. 57, No. 4

637-641

EN

Wireless system for radiometric measurements contains probes, for gamma radiation measurements and other probes for radon concentration measurements in air and water. The probes have the form of droplet-tight cylinders powered from a local battery. Measuring data collecting unit, based on a portable computer, communicates directly with the probes in a wireless manner using the WiFi communication network, or through the internet using mobile phone GSM network. Serial port wire connection is also possible. The local battery ensures at least 14 days of continuous operation of the probes. For long term measurements, the probes can also be powered from solar panels. Construction and operation of the probes are described. Results of scintillation probes investigation are given. Detection efficiency of the developed probes is comparable with the laboratory probes offered in our country.

5

Laboratory automatic measuring system for gamma specimens

Jakowiuk A., Filipiak P., Bartak J., Pieńkos P., Kowalska E.

Nukleonika

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2012

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Vol. 57, No. 4

633-635

EN

LG Gamma Counter is designed for low activity measurement of the radioactive isotope iodine 125I in liquid or solid samples during radioimmunoassay (RIA) and immunoradiometric assay (IRMA) in small or medium size clinic laboratories. Apart from RIA and IRMA programmed procedures, a measurement of small activity gamma samples is possible. The well scintillator NaI(Tl) is used as radiation detector for the isotope 125 I in the measuring channel, the well dimensions fi being 17 x 38 mm. Gamma Counter was adapted for measuring radioactivity of single samples. The counter is equipped with an automatic system allowing transportation of examined samples to a scintillator well. The gauge is based on an integrated computer which is working under the control of Windows CE and is equipped with special software allowing for setting measurement parameters and communication with an external computer. The measured sample is placed inside the scintillator well either by an automatic sample feeder or manually. The pulses from a photomultiplier tube after amplification and shaping in pulse amplifiers are counted in the window of a single channel analyser by a programmable pulse counter under the control of microprocessor system. The measured count rate is the measure of activity of the assayed sample. Expected count rate error due to unstable operation of amplification is lower than 1%.

6

Application of dose reader CD-07 for depth-dose distribution measurements in the process of microbiological radiation decontamination

Gryczka U., Jakowiuk A., Migdał W., Kałuska I., Machaj B.

Nukleonika

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2009

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Vol. 54, No. 4

261-265

EN

Dose reader CD-07 has been introduced for measurements of a dose distribution during dose mapping exercises and for calculations of electron beam energy. This instrument consists of an SP-880 spectrophotometer equipped with a driving motor to move a dosimetric foil across light beam in the front of narrow light aperture. To control the movement of the foil and to present and store the measuring results a specialized software has been developed. In this paper the use of dose reader CD-07 in Performance Qualification of irradiated herbs was described.

7

Metrological features of a beta absorption particulate air monitor operating with wireless communication system

Jakowiuk A., Urbański P., Świstowski E., Machaj B., Pieńkos J., Kowalska E.

Nukleonika

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2008

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Vol. 53, suppl. 2

37--42

EN

A system for measurements of particulate matter in the ambient air, employing beta absorption instrument AMIZ-2007 with wireless communication facilities based on GPRS technology, is presented. Uncertainty of measurements caused by the counting statistics was analyzed and it was found that at least 3 h of sampling time is needed to achieve coefficient of variation lower than 20% for the average concentration of particulate matter in the ambient air exceeding 10 μg/m3. Application of a C-14 beta ray source instead of Pm-147 improves sensitivity of the measurement ca. two times. Some results of on-line operation of the system with PM10 and PM2.5 samplers are also shown.