Wszystkie pola: radiation protection - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Minimum exposure path in an enclosure of randomly placed radioactive sources
Autorzy:: Aljohani, M.
Powiązania:: https://bibliotekanauki.pl/articles/148350.pdf
Data publikacji:: 2003
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: radiation protection
exposure minimization
Opis:: In this paper, two models to establish the minimum exposure path in a randomly placed radioactive sources enclosure are developed. The first model establishes the minimum exposure rate path and the second establishes the normal, to the inlet and outlet surfaces, path that gives a minimum exposure. The path that gives the least exposure is chosen. Although the point kernel technique is utilized and the enclosure is assumed rectangular with randomly placed radioactive point sources, the two models are independent techniques and can be easily incorporated with deterministic and statistical methods as well as other types of enclosures and source geometries.
Źródło:: Nukleonika; 2003, 48, 4; 201-205
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Air-crew exposure to cosmic radiation on board of Polish passenger aircraft
Autorzy:: Bilski, P.
Olko, P.
Horwacik, T.
Powiązania:: https://bibliotekanauki.pl/articles/147249.pdf
Data publikacji:: 2004
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: dosimetry
cosmic radiation
radiation protection
Opis:: To establish the need for individual monitoring of air crew, exposure of air-crew members of Polish airlines LOT to cosmic radiation has been determined and several dosimetry methods tested in flight. Passive radiation dosimetry (using thermoluminescent LiF and chemically etched CR-39 track detectors) was supported by calculations with the CARI computer code. We found that the air crew of most of the LOT aircraft studied (with the exception of those flying ATR propeller aircraft) may somewhat exceed or, in certain conditions (depending on solar activity), may considerably exceed the effective dose level of 1 mSv per year. For crew members flying regularly on B-767 aircraft, the estimated yearly effective dose ranged between 2 mSv and 5 mSv, depending mainly on flying frequency and solar activity. During periods of enhanced intensity of cosmic radiation (i.e. during minimum solar activity) the effective doses could be close to the level of 6 mSv per year.
Źródło:: Nukleonika; 2004, 49, 2; 77-83
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Dedicated computer software to radiation dose optimization for the staff performing nuclear medicine procedures
Autorzy:: Matusiak, K.
Kosek, J.
Powiązania:: https://bibliotekanauki.pl/articles/146774.pdf
Data publikacji:: 2012
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: dose optimization
nuclear medicine
radiation protection
Opis:: Nuclear medicine techniques allow physicians to observe and diagnose physiology of chosen organs as well as the whole body of a patient. This visualization is possible not only because radioisotopes are applied, but there is also a significant progress in the computer software possibility. The advantage of the cooperation between medicine and informatics can be implemented in the radiation protection field of medical staff. The presented computer software, so-called Optimizer, was dedicated to the medical staff responsible for radiopharmaceutical preparation. It is known that the doses obtained in the nuclear medicine "hot labs" can be higher in comparison with the doses obtained by the rest of the personnel in the same department. The main advantage of the presented program is that the time needed for radiopharmaceutical preparation can be shortened and, as a result, the doses absorbed by personel can be reduced. The information of the volume containing planned radioactivity at the time of the application can significantly reduce the number of checking (volume and radioactivity), which normally takes place before the final handing over the radiopharmaceutical to the application. A user-friendly interface provides control at each step of the preparation protocol. For the convenience of medical staff all current examinations were coloured in one of the three colours : red (an application has to be done now), yellow (waiting) and green (done). The Optimizer was created for the Nuclear Medicine Department in the 5th Military Hospital in Kraków (Poland). What is more, currently it is successfully used and final TLD (thermoluminescent dosimetry) tests have been performed.
Źródło:: Nukleonika; 2012, 57, 4; 497-502
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Methods and measurements in radiation synovectomy with 90Y of knee joint dosimetry
Autorzy:: Kempińska, M.
Powiązania:: https://bibliotekanauki.pl/articles/147678.pdf
Data publikacji:: 2008
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: Yttrium-90
dosimetry
synovectomy
radiation protection
gammacamera
knee joint
Opis:: Radioisotope synovectomy is based upon an yttrium-90 colloid injected into the knee joint (the usual injected activity ranges from 111 MBq to 222 MBq per joint). Execution of the procedure needs participation of a nuclear medicine specialist as well as an orthopedist or a rheumatologist and a technologist who prepares radiopharmaceuticals. All of these participants are exposed to ionizing radiation. The ionization doses for patients and personnel are dependent not only on the activity injected, but also on the method and process of injection as well as the radioactivity measurement procedure used. In the experiments performed, a significant influence of the biodistribution of the radioisotopic substance on the exposure results has been observed.
Źródło:: Nukleonika; 2008, 53, suppl. 1; 39-43
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Nuclear and radiation safety and security
Autorzy:: Niewodniczański, J.
Powiązania:: https://bibliotekanauki.pl/articles/146522.pdf
Data publikacji:: 2008
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: nuclear safety
nuclear security
radiation protection
safety
security culture
safeguards
Opis:: All applications of nuclear materials as well as of any sources of ionizing radiation are accompanied by a risk of radioactive contamination of the environment or unnecessary overexposure of workers and the general public. Such an incident may result from malfunctioning of devices (radiation sources, shields, monitoring systems etc.) or a diversion from accepted procedures; it may be also intentional (sabotage or terrorist actions). All such incidents may be harmful for the victims, but they also may ruin the image of a given technology, irrespectively of the country or institution where it has occurred. Safe, secure, peaceful and efficient use of nuclear energy as well as of any source of ionizing radiation requires sustainable tools, including infrastructure that provides legal, regulatory, technological, human and industrial support for that programme. Therefore, the measures assuring radiation and nuclear safety and security, including physical protection of nuclear materials and radioactive sources, originate from internationally established and controlled principles on which obligatory national regulations are based. Evolution of technologies and changes of global or regional political situation may lead to new threats which creates a need to introduce new legal and institutional instruments, both national and international. Poland seems to be well situated in the present nuclear and radiation safety and security system.
Źródło:: Nukleonika; 2008, 53, suppl. 2; 5-10
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Radon soil-gas measurement campaign in Hessen: an approach to identifying areas with enhanced geogenic radon
Autorzy:: Kuske, Till
Kerker, Steffen
Breckow, Joachim
Lehné, Rouwen
Laupenmühlen, Tatjana
Jedmowski, Lena
Powiązania:: https://bibliotekanauki.pl/articles/146321.pdf
Data publikacji:: 2020
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: radiation protection law
radon-priority-areas
radon
soil gas
Opis:: The new radiation protection law in Germany, which came into effect 2018, puts greater emphasis on the protection against naturally occurring radiation, especially radon as a known health hazard. The law requires the delineation of radon priority areas, where prevention and remediation of high indoor radon concentrations should be taken with priority. In Germany, radiation protection is the administrative responsibility of the federal states. The state of Hesse has early on decided to fully survey the state for radon priority areas. To identify radon priority areas, the geogenic radon potential has to be determined. To achieve that radon, soil-gas measurements combined with soil permeability are a necessity. The University of Applied Sciences (THM) in Giessen is responsible for the radon soil-gas measurement campaign in Hessen. To achieve a statistically sound survey of the state of Hessen with an achievable amount of different measurement locations, and in the given time-frame, a geology-based concept has been designed. Taking into account the known geological information about geological structures in combination with the administrative counties, a survey strategy has been established. Prior known information regarding soil thickness, moisture, digability, and other technical limitations are used to determine the exact measuring locations. At every location, the radon activity in soil gas is measured. The soil permeability is determined for every measurement as well. Three measurements are performed at each location. Having completed the first set of measurements, the design criteria of the campaign and the practical experiences will be presented.
Źródło:: Nukleonika; 2020, 65, 2; 139-144
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Assessment of radionuclide migration and radiological human exposure at the closed near-surface radioactive waste repository
Autorzy:: Gudelis, A.
Nedveckaite, T.
Prokopčiuk, N.
Filistovič, V.
Remeikis, V.
Motiejunas, S.
Powiązania:: https://bibliotekanauki.pl/articles/148646.pdf
Data publikacji:: 2010
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: near-surface repository
engineering barriers
radionuclide migration
groundwater pathway
radiation protection
Opis:: The near-surface “RADON” type radioactive waste repository, installed in 1963 and designed to store radioactive waste formed in industry, medicine and scientific investigations, was closed in 1989 because it did not meet the requirements imposed on the radioactive waste disposal. A comparatively small amount of radioactive waste is stored in this repository, but the inventory comprises various kinds of waste: short-lived low-level radioactive waste, short-lived low and intermediate radioactive waste, long-lived intermediate and high-level radioactive waste. The possible site-specific radionuclide migration through the groundwater pathway as well as the human exposure are considered by the computer program RESRAD-OFFSITE in this paper. The analysis of the obtained data shows that out of all stored radionuclides only H-3, C-14 and Cl-36 exceeding the dose constraint of 0.2 mSv can be considered as dangerous. The monitoring carried out in the repository environment has shown the contamination of groundwater with radioactive tritium and a significant reduction of contamination after construction of additional protective engineering barriers. For the assessment of the contribution of separate site-specific parameters of the model taking into account uncertainties of the model and parameters to the annual effective dose, the computer code RESRAD-OFFSITE provides the possibility of applying the regression analysis. It has been determined that the aquifer lateral dispersion as well as the hydraulic gradient, the radionuclide activity concentration in the repository together with the rate of penetration into the environment and the precipitation amount have the largest influence on the assessment accuracy of annual effective doses.
Źródło:: Nukleonika; 2010, 55, 2; 251-259
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Application of ionizing radiation to environment protection
Autorzy:: Chmielewski, A.
Powiązania:: https://bibliotekanauki.pl/articles/147932.pdf
Data publikacji:: 2005
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: electron accelerator
gamma rays
flue gas
wastewater
sludge
Opis:: Radiation technology may contribute to the environmental protection to a great extent. Electron beam industrial installations for flue gases containing SOx and NOx treatment have been already built in China and Poland. The same technology for high sulphur and high humidity off-gases (low quality lignite) has been successfully tested in an industrial pilot plant in Bulgaria. Pilot plant tests performed in Japan have illustrated that by applying electron beam for municipal waste incinerator off-gases treatment the concentration of dioxins can be reduced by 80%, other persistent organic pollutants can be depredated as well. The positive results of electron beam wastewater treatment are the basis for a full-scale industrial plant being built in the South Korea. A pilot gamma plant for sludge irradiation producing a high grade organic fertilizer is in operation in India. All these achievements are reported in this paper.
Źródło:: Nukleonika; 2005, 50,suppl.3; 17-24
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Radiation effects in polypropylene/polystyrene blends as the model of aromatic protection effects
Autorzy:: Głuszewski, W.
Zagórski, Z. P.
Powiązania:: https://bibliotekanauki.pl/articles/147686.pdf
Data publikacji:: 2008
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: energy transfer
polypropylene
polystyrene
protection effect
radiation grafting
Opis:: A technically useful composition containing polypropylene (PP) as a principal constituent, expected to be working or to be processed in ionizing radiation field, e.g. for sterilization, has to be protected from undesired radiolysis resulting in radiation damage. Usually, conventional additives are used which are generally effective, especially when containing aromatic groups. They can be sometimes unacceptable, e.g. in medical applications. Polystyrene (PS) has been investigated as a protective component, in analogy to the classical case of cyclohexane/benzene system. Mechanical mixing of both polymers showed to be of modest effect, but two other procedures, of soaking polypropylene powder with polystyrene dissolved in styrene, or soaking with styrene and gamma preirradiation with resulting grafting (G = 12000 effects/100 eV), resulted in the composition of improved resistance towards radiation. The energy transfer, which explains the effect, is extended at a distance of 8-12 mers of polypropylene. The investigations have been made by gas chromatography and diffuse light reflection spectrophotometry (DRS), after 10 MeV electron beam irradiations.
Źródło:: Nukleonika; 2008, 53, suppl. 1; 21-24
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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