Investigation of Enrichment Process of Radioisotopes in Iron Ore and determination Correlation Coefficient Between Uranium and Thorium Series in them
Reza
Pourimani
Department of Physics, Faculty of Science, Arak University
author
Hamid Reza
Azimi
Department of Physics, Faculty of Science, Arak University
author
text
article
2016
per
Abstract In this research different samples of Iron Ore in Shams Abad Iron mine have been investigated. The samples included different compositions of iron ore that the most of them are hematite, limonite, siderite and goethite. The samples were taken from depth parts of the mine and after Preparation and expiration equilibrium time, the specific activity of natural radionuclides were determined using gamma ray spectrometry method with employing high purity germanium detector (HPGe) with 30% relative efficiency. The activity concentration of 226Ra, 232Th and 40K in these samples varied from 9.39±0.53 to 271.70±1.84,
Journal of Radiation and Nuclear Technology
University of Guilan
2423-6616
2
v.
3
no.
2016
1
8
https://jrnt.guilan.ac.ir/article_1943_ad25789a56cd226a8fe40379cc6e563f.pdf
Investigation and modification of power changing effects in HWZPR on the activity of irradiated foils
زهرا
نصرآزادانی
سازمان انرژی اتمی- پژوهشکده راکتور- سرپرست بخش مهندسی هسته ای (راکتور تحقیقاتی HWZPR)
author
جمشید
خورسندی
مدیر گروه پژوهشی تسهیلات کاربردی- پژوهشکده راکتور- پژوهشگاه علوم و فنون هسته ای-سازمان انرژی اتمی
author
رعنا
سلیمی
کارشناس مسئول آز. Solid track
author
منوچهر
بهفرنیا
کارشناس مسئول آز. دینامیک
author
text
article
2015
per
In this paper, the effects of power changing on the activities of different irradiated foils have been studied. In HWZPR, there is not any remote control system for irradiation of different foils. On the other hand, in order to measurement the physical parameters in the reactor, it is necessary to irradiate foils in the stable power. Therefore in this work, the effects of different changes in the rector power, for example the power raising period, the delay neutron and photo neutrons effects, the error of the operator in the experiment have been studied. For this purpose, by using the fission chamber detector in the core and related electronic circuit, the change of neutron population in the duration of the experiment has been saved. For analyzing these measured results, the suitable program was written in the Matlab environment and the modified irradiation time for different foils is calculated. The measured result show that, this effects, it is considerable in long period and high power condition, for any foil with low half life.
Journal of Radiation and Nuclear Technology
University of Guilan
2423-6616
2
v.
3
no.
2015
9
16
https://jrnt.guilan.ac.ir/article_1944_77eb81d0b2ed08697ceec6068aa2c410.pdf
Nuclear Criticality of Transportation and Storage Cask of Spent Fuel in WWER-1000 Reactor for Two Modes of Burn-Up and Fresh Fuels
مصطفی
حسن زاده
هیات علمی
author
اصغر
محمدی
کارشناس
author
نیما
امیدواری
NSTRI
author
text
article
2015
per
One of the problems of nuclear power plants beside electricity generation is the product of spent fuels that should be managed in a proper manner. Therefore, some countries have chosen dry storage for their spent fuel in which double purposed casks are employed for transportation and storage of these spent fuels. TK-13 is one of the casks used for transportation and storage of spent fuels in WWER-1000 reactor which can transport and store 12 assemblies of spent fuels. In this study, the safety of nuclear criticality of inner holding basket for the fuel in two cases of burn-up and fresh fuels by MCNPX2.6 and ORIGEN2.1 codes has been calculated and analyzed. According to results of two modes of burn-up and fresh fuels show that casks with 66 cm radius and 28 cm of pitch and inner holding baskets made of bore bearing and bore less steel, respectively fulfill non-criticality of system.
Journal of Radiation and Nuclear Technology
University of Guilan
2423-6616
2
v.
3
no.
2015
17
26
https://jrnt.guilan.ac.ir/article_1945_1631742f35f9badfd49793cd43333bea.pdf
Study of the possibility of using gamma - irradiated sewage sludge in different plants production
حمایت
عسگری لجایر
گروه علوم و مهندسی خاک، دانشکده کشاورزی دانشگاه تبریز
author
نصرتاله
نجفی
گروه علوم و مهندسی خاک، دانشکده کشاورزی دانشگاه تبریز
author
ابراهیم
مقیسه
پژوهشکده کشاورزی هستهای، پژوهشگاه علوم و فنون هستهای، سازمان انرژی اتمی ایران
author
text
article
2015
per
sewage sludge is an organic fertilizer and in addition to pathogens, containing macronutrients (including nitrogen, phosphorus, potassium) and micronutrients (for example iron, zinc, copper, manganese, molybdenum) and heavy metals such as arsenic, cadmium, chromium, lead, mercury, nickel, selenium, and etc. Using ionizing radiation is the best way for disinfection of sewage sludge and absorption of radiation energy by water molecules of sewage sludge causes the ionization of their and formation of oxidizing and reducing free radicals. A comprehensive report does not exist on the effects of ionizing radiation such as gamma rays on the changes in chemical properties of sewage sludge; however, irradiation of sewage sludge could remove dangerous pathogenic organisms and plant growth inhibitors and could increase plants yield. In Iran due to the low cost of sewage sludge it was used in the cultivation of plants particularly fresh vegetables. The existence of various organic and inorganic pollutants in sewage sludge used in the cultivation of vegetables increased the risk of various diseases in consumers due to their direct consumption. Therefore, the use of risk assessment models have been suggested to predict the risks of crops consumption by various consumers and vegetables production with organic fertilizers containing pollutants such as sewage sludge. Lack of study about comparing plants grown in irradiated and non-irradiated sludge with risk assessment equations, reveals necessity of these equations and their mechanisms.
Journal of Radiation and Nuclear Technology
University of Guilan
2423-6616
2
v.
3
no.
2015
27
37
https://jrnt.guilan.ac.ir/article_1946_a844e93b436917bf889541284b3d65de.pdf
Assessment of mass attenuation coefficient of lead nanoparticles for variety of gamma source
Mohammad Ali
Shafaei
Assistant Professor in Department of Physics
author
text
article
2015
per
In this study, exposure to gamma-ray attenuation coefficient in the thickness of the nanoparticle PBO and lead nitrate was discussed. The accurate measurements were done on the sources of gamma rays CS137, Ra226 and Sr90 by Geiger Muller detector. The γ-rays exposure is not a major concern because strontium-90 emits no gamma radiation and its decay product yttrium-90 emits only a small amount. Strontium-90 decays to yttrium-90 by emitting a beta particle, and yttrium-90 decays by emitting a more energetic beta particle with a Where the radiation energy is less than 0.001 MeV. The obtained data revealed that the overall from experiments that most mass attenuation coefficient in lead oxide nanoparticles of lead nitrate. The results obtained for the mass attenuation coefficient μ (cm2 / g) observed that the effect is an increase in the thickness of the sample in the weakening of radiation is very high. The result less than the thickness of lead nanoparticles be used to making gamma radiation protection shields similar lead, this will be permitted to achieve the minimum weaken the shields lighter than lead shields the previous.
Journal of Radiation and Nuclear Technology
University of Guilan
2423-6616
2
v.
3
no.
2015
38
47
https://jrnt.guilan.ac.ir/article_1947_32c22a58d74746af5680a67633293f7c.pdf
Stopping power of Relativistic accelerated charged particles in laser fusion (ICF) according to collective model
babak
Malekynia
science Committee
author
Azadeh
Haghigatzadeh
science Committee
author
sajad
payun
دانشجو
author
text
article
2015
per
Abstract:The inertial confinement fusion of plasma block ignition, volume ignition, spark ignition and fast ignition models are iperformed with the laser driven. The ignition of these models have the different fusion conditions. For example the volume ignition model is ignited at 1000 keV temperature and 10^6 times solid state densities. Or these fusion conditions for plasma block are 10 keV and density of solid state. Due to the self-similarity og ignition, The stopping power of alpha particles are important. The plasma will be reheated by alpha particles. In the high densities the collective model according to Gabors theorem is affected. It is the favorable with the thermo nuclear experimental. The calculating of collective effect of charged particles stopping power with including the nonrelativistic and relativistic investigates that the stopping power of relativistic particles decreases and then the reheating of plasma would be increased. Keywords: Stopping Power, Collective Model, Inertial Confinement Fusion, Solid state Density, Accelerated charged particles
Journal of Radiation and Nuclear Technology
University of Guilan
2423-6616
2
v.
3
no.
2015
48
59
https://jrnt.guilan.ac.ir/article_1948_1243a17a284c1e6db712a75725701523.pdf