ORIGINAL_ARTICLE
Analyzing the Loss of Coolant Accident in PWR Nuclear Reactors with Elevation Change in Cold Leg by RELAP5/MOD3.2 System Code
As, the Russian designed VVER-1000 reactor of the Bushehr Nuclear Power Plant (BNPP) by taking into account the change from German technology to that of Russian technology, and with the design of elevation change in the cold legs has been developed; therefore safety assessment of these systems for loss of coolant accident (LOCA) in elevation change in the cold legs and comparison results for non change elevation in the cold legs for a typical reactor (normal design of nuclear reactors) is the main important factor to be considered for the safe operation. In this article, the main objective is the simulation of the loss of coolant accident scenario by the RELAP5/MOD3.2 code in two different cases; first, the elevation change in the cold legs, and the second, non change in it. After comparing and analyzing these two code calculations the results have been generalized for a new design feature of Bushehr reactor. The design and simulation of the elevation change in the cold legs process with RELAP5/MOD3.2 code for PWR reactor is performed for the first time in the country, where it is introducing several important results in this respect.
https://jonsat.nstri.ir/article_686_978a0cd27f314be67d90401a571dd7dc.pdf
2006-08-23
1
5
RELAP5/MOD3.2 Code
Bushehr VVER-1000 Reactor
Loss of Coolant Accident (LOCA)
Model Nodalization in RELAP5 Code
Computerized Simulation
Reactor Safety
H
Kheshtpaz
1
دفتر امور ایمنی هستهای کشور، سازمان انرژی اتمی ایران، صندوق پستی: 111-75181، بوشهر - ایران
LEAD_AUTHOR
C
Alison
2
دفتر امور ایمنی هستهای کشور، سازمان انرژی اتمی ایران، صندوق پستی: 111-75181، بوشهر - ایران
AUTHOR
AEP “Preliminary safety analysis report,” PSAR, Chapter 5, Rev 1, (2000).
1
C.D. Fletcher, “Loss of offsite power scenarios for the Westinghouse Zion-1 Pressurizes Water reactor,” EGG-CAAP-5156, (1980).
2
C.D. Fletcher and M.A. Bolander, “Analysis of instrument tube ruptures in Westinghouse 4-loop PWRs,” UREG/CR-4672, EGG-2461, (1986).
3
C.D Fletcher and R.R. Schults, “RELAP5/MOD3.3 Code Manual,” NUREG/CR-5535, Volume III, (2001).
4
ORIGINAL_ARTICLE
Effects of Mechanical and Thermal Stresses on the Absorption Coefficient and Penetration Range of β-Particles in Aluminum
Many results have been obtained in our previous studies on the effects of structural defects on the physical properties of crystalline materials. In this work, we are presenting our experimental results for the influence of the structural deffects on the absorption coefficient and the penertration depth of β-particles in aluminum metal. For this investigation, 3 pieces of Al foils, with different thicknesses. were prepared. Then, one group of samples were annealed to show less defects. Other Al samples were exposed to heavily defect creating work, such as: hammering, rolling, and thermal quenching treatments. Then, by the use of the conventional method, the penetration depth of β-particles of different energies from 90Sr, 36Cl, and 13Cs sources were determined. Our results show that the measured R-values for the defected samples are higher than those of the annealed ones. Also, it was found that the penertration depth for the defected samples increases as the β-particle’s energy increases.
https://jonsat.nstri.ir/article_687_deb81b648e27bd31c95308b0692c57f2.pdf
2006-08-23
6
9
Crystal Defects
Absorption Coefficient
Penetration Depth
Beta Particles
Thermal Stresses
Radiation Effects
Aluminum
Crystal Structure
B
Salehpour
1
دانشکده فیزیک، دانشگاه تبریز، صندوق پستی: 5166614776، تبریز ـ ایران
LEAD_AUTHOR
T
Pirhoseinlu
2
دانشکده فیزیک، دانشگاه تبریز، صندوق پستی: 5166614776، تبریز ـ ایران
AUTHOR
B. Henderson, “Defects in Crystalline Solids,” Edward Arnold Press (1972).
1
M.W. Thompson, “Defects and radiation damage in metals,” Cambridge University Press (1969).
2
G.P. Pells, “Radiation effects and damage mechanism in ceramic insulators and window materials,” J. Nucl. Mat, 155-157/1, 67-76 (1988).
3
B. Salehpour, “Studies of residual stresses in Al using DSC and XRD methods,” J. Ultra Science, 12(3), 412-415 (2000).
4
R. Jasezek, “Carrier scattering by dislocations in semiconductors,” J. Mat. Sci, 12, 1-9 (2001).
5
C.D.A.I. Ryazonav and Etal, “Instability of interstitial clusters under ion and electron irradiation in ceramic materials,” J. Nucl. Sci, 23, 372-379 (2003).
6
ORIGINAL_ARTICLE
Dosimetry of 186Re Radioisotope in Intravascular Brachytherapy to Reduce Vascular Restenosis
Recently, the use of filled angioplasty balloon with radioactive solution was proposed as one of the new intravascular irradiation techniques to reduce restenosis. Measurement of dose distribution beyond an angioplasty balloon filled with 186Re-perrhenate was carried out using a radiochromic film. The measured dose rate in distance of 0.4 mm from the balloon surface (with diameter 4mm and length of 40mm) was 2.07 [(cGy/min)/(mCi/ml)]. Calculation of dose was carried out for the balloons with various size, using Monte-Carlo method with MCNP4B code and the result was comparable with the experimental results. Suitable specific concentrations for delivery of doses from 12 to 20 Gy in vessel wall were obtained 250 to 400(mCi/ml) in the time of irradiation less than 4min and the fall of radial dose was obtained approximately 80 percent in radial distance of 0.5mm from the balloon surface. The internal dose was calculated by MIRD method with assuming that in the case of balloon rupture,186Re-DTPA contents were released into the circulation system and was about 0.0027 cGy/MBq which is comparable with the 99mTc-DTPA model. Therefor, using from 186Re-DTPA is suitable due to the radiation safety and the delivery of dose in order to reduce restenosis for the coronary vessels with centric cross section.
https://jonsat.nstri.ir/article_688_651fc9145eeeb714d75f2f278264013d.pdf
2006-08-23
10
16
Dosimetry
Restenosis
Radiochromic Film
Monte-Carlo Method
Intravascular Brachytherapy
Internal Dosimetry
H
Pourbeigi
hpourbeigi@aeoi.org.ir
1
مرکز تحقیقات هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 3486-11365، تهران ـ ایران
LEAD_AUTHOR
Sh
Sheibani
ssheibani@aeoi.org.ir
2
مرکز تحقیقات هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 3486-11365، تهران ـ ایران
AUTHOR
H
Ghafourian
3
مرکز تحقیقات هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 3486-11365، تهران ـ ایران
AUTHOR
M.R
Ghahremani
4
مرکز تحقیقات هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 3486-11365، تهران ـ ایران
AUTHOR
1. A.J. Carter, J.R. laird, L.R. Bailley, “Effect of endovascular radiation from a β-particle-emitting stent in a porcine coronary restenosis model,” Circulation, 94, 2364-2368 (1996).
1
2. J.A. Condado, R. Waksman, O. Gurdial, “Long-term angiographic and clinical out come after percutaneous transluminal coronary and intracoronary radiation therapy in humans,” Circulation, 96, 727-732 (1997).
2
3. R. Waksman, “Local catheter-based intracoronary radiation therapy restenosis prevention,” Am. J. Cardiol, 78, 23-28 (1996).
3
4. D.O. Willams, “Radiation vascular therapy: A novel approach to preventing restenosis,” Am. J. Cardiol, 87(7A), 18E-20E (1998).
4
5. P. Teirstin, “Catheter-based radiotherapy to inhibit restenosis after coronary stenting,” N. Engl. J. Med, 336, 1697-1702 (1997).
5
6. V. Verin, P. Urban, Y. Popowski, M. Schwger, Ph. Nauer, P.A. Dorza, P. Chateain, M.J. Kurtz, W. Rutishauser, “Feasibility of intracoronary β-irradiation to reduce restenosis after balloon angioplasty,” Circulation, 95, 1138-1144 (1997).
6
7. H.I. Amols, L.E. Reinstein, J. Weinberger, “Dosimetry of a radioactive coronary balloon dilution catheter for treatment of neointimal hyperplasia,” Med. Phys, 23, 1783-1788 (1996).
7
8. G.S. Stabin, M. Konijnenberg, F.F. Knapp, R.H. Spencer, “Monte Carlo modeling of radiation dose distribution in intravascular radiation therapy,” Med. Phys, 27, 1086-1092 (2000).
8
9. J.F. Briesmeister, “MCNP-A general Monte Carlo N-particle transport Code, Version 4C,” Los Alamos National Laboratory Report LA12625 (2000).
9
10. O. Israel, Z. Keidor, R. Rubinov, G. Losilevski, A. Frenel, A. Kuten, L. Betman, G.M. Kolodny, D. Yarnisky, D. Front, “Quantitative bone single-photon emission computed tomography for prediction of pain relief in metastatic bone disease treated with rhenium-186 etidronate,” J. Clinical Oncolo. 18, 2747-2754 (2000).
10
11. USDOE “ENSDEF decay data Center,” Brookhaven National Laboratory,Uptone. Ny, USA (2004).
11
12. O. Ratib, Y. Ligier, Gh. Girard, M. Logean, R. Welz, “OSIRIS. A multiplatform software for display and analysis of images from the cardiac DICOM CD Standard,” University Hospital of Geneva, Switzerland (2006).
12
13. S.R. Thomas, H.L. Atkin, J.G. Macafee, “MIRD dose estimatereport No.12 radiation absorbed dose from 99mTc-DTPA,” J. Nucl. Med, 25, 503-505 (1984).
13
ORIGINAL_ARTICLE
Gamma Radiation Inactivation of FMD Virus Type A87/IRN in Order to
Preparation of Killed Vaccine
In this research FMD virus type A87/IRN was used. The virus was multiplied on a BHK21 cell line. Then, the virus titration was detected by TCID50% (Tissue Culture Infection Dose 50%) method, and it was 107.5/ml. The FMD virus was irradiated by gamma ray from 60Co source in-4 till 4°C. The gamma cell, model Issledovapel-PX-30, with the dose rate of 0.551 Gy/sec was applied. Different doses of gamma ray were applied and 6 times were repeated for each dose. Antigenicity and infectivity of the irradiated and control virus samples were studied by Complement Fixation, and Cell Culture methods, respectivly. The dose/survival curve for the FMD virus was drawn, according to the curve and D10 Value factor (Dose of gamma ray that decrease one logarithmic cycle of virus population) was obtained, and the optimum dose for inactivation of FMDV type A87/IRN and the unalteration its antigenicity of 40-44 kGy was obtained.
https://jonsat.nstri.ir/article_689_d91bb298e75627ec1c12a8b4d683be34.pdf
2006-08-23
17
21
Vaccines
Viruses
Inactivation
Gamma radiation
Irradiation
Livestock
Foot and Mouth Disease
F
Motamedi Sedeh
farah.motamedi@gmail.com
1
مرکز تحقیقات کشاورزی و پزشکی هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 498-31485، کرج - ایران
LEAD_AUTHOR
A
Khorasani
2
مرکز تحقیقات کشاورزی و پزشکی هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 498-31485، کرج - ایران
AUTHOR
K
Shafaee
3
مرکز تحقیقات کشاورزی و پزشکی هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 498-31485، کرج - ایران
AUTHOR
M
Salehizadeh
4
مرکز تحقیقات کشاورزی و پزشکی هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 498-31485، کرج - ایران
AUTHOR
H
Fatolahi
5
مرکز تحقیقات کشاورزی و پزشکی هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 498-31485، کرج - ایران
AUTHOR
K
Arbabi
6
مرکز تحقیقات کشاورزی و پزشکی هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 498-31485، کرج - ایران
AUTHOR
F
Majd
7
مرکز تحقیقات کشاورزی و پزشکی هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 498-31485، کرج - ایران
AUTHOR
1. S.J. Barteling and J. Vreeswijk, “Developments in foot and mouth disease vaccines,” Vaccin, Vol. 9, February, 75-87, (1991).
1
2. S. Gibbons, J. Catcott, B. Smtthcors, “Bovine medicine and surgery and herd health management,” Foot and Mouth Disease, 47-50, (1970).
2
3. L. REED, and H. MUENCH, “A simple method of estimation fifty percent end point,” Amer, J. Hyp, 27, 493, (1938).
3
4. J.H. Lombardo and E.E. Smolko, “A biotechnological project with a gamma radiation source of 100,000 ci,” Radiat. Phys. Chem, 35(4-6), 585-589, (1990).
4
5. J.A. Kolmer, “Serum diagnosis by complement fixation test,” Lea and Febiger Publishers, Philadelphia, 345, (1928).
5
6. M. Salehizadeh, “Studies on the production of specific hyperimmune antisera against type A FMD virus. Archives of Razi Institute. 41:106-111, (1990). E. Pollard. The action of ionizing radiation on viruses. Advan. Virus. Res, 2, 109-151, (1955).
6
7. E. Pollard. “The action of ionizing radiation on viruses,” Advan. Virus. Res, 2, 109-151, (1955).
7
8. C.D. Johnson, “Direct X-ray inactivation of the viruses, foot and mouth disease and vesicular stomatitis,” Nature, 207, 37-39, (1965).
8
9. T. Frescura and P. Vivoli, “Studies of the foot and mouth disease virus sub-types using antigens inactivated by gamma radiations,” Zbl. Vet. Med. B, 20, 822-825, (1973).
9
ORIGINAL_ARTICLE
Biosorption of Tungsten from Aqueous Solutions by New Strain of Bacillus sp. MGG-83 Isolated from Anzali Lagoon
In this study 38 water and sludge samples were collected from various areas of Anzali lagoon and 100 strains were isolated when the samples were cultured in the media. Among them, only one strain showed the maximum absorption capacity (65.4 mg/g dry wt). It was tentatively called MGG-83 strain. Further investigations proved that the strain MGG-83 belonged to the genus of Bacillus. The maximum uptake of tungsten was obtained at pH 2. The tungsten taken up by the Bacillus sp. MGG-83 increased by increasing the concentration of the tungsten. At 600mg/l, the uptake was 545.6 mg/g dry wt. The uptake of tungsten within 5 min of incubation was relatively rapid and the absorption continued slowly thereafter. When sodium azide and 2,4 dinitrophenol were used, it was evident the 80% of the absorbed tungsten is independent of the metabolism and 20% depends on the metabolism. When the cells were treated by the heat, the tungsten uptake decreased to 11%. The tungsten uptake increased with increasing in biomass of dry weight of the cells (87% at 20 mg biomass; 100% at 25mg biomass). The applied temperature in the range of 20-450C did not show any significant change in the uptake.
https://jonsat.nstri.ir/article_690_7c8c6f2bde3280cc1ccb151f462a7de8.pdf
2006-08-23
22
28
Biosorption
Tungsten
Bacillus sp
Heavy Metals
Anzali lagoon
S
Ghorbanzadeh Mashkani
1
گروه بیوتکنولوژی هستهای، مرکز تحقیقات هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 3486-11365، تهران - ایران
LEAD_AUTHOR
F
Malekzadeh
2
گروه میکروبیولوژی، دانشکده علوم، دانشگاه آزاد اسلامی واحد قم، قم - ایران
AUTHOR
H
Ghafourian
3
گروه بیوتکنولوژی هستهای، مرکز تحقیقات هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 3486-11365، تهران - ایران
AUTHOR
M.R
Soudi
4
گروه میکروبیولوژی، دانشکده علوم، دانشگاه الزهرا (س)، تهران - ایران
AUTHOR
P
Tajer Mohammad Ghazvini
5
گروه بیوتکنولوژی هستهای، مرکز تحقیقات هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 3486-11365، تهران - ایرانگروه میکروبیولوژی، دانشکده علوم، دانشگاه الزهرا (س)، تهران - ایران
AUTHOR
1. N.P. L’vov, A.N. Nosikov, A.N. Antipov, “Tungsten containing enzymes,” Biochemistry (Moscow). 67, 196-200 (2002).
1
2. H.T. Evans, F.T. Manheim, S. Landegren, Molybdenum. In: “Handbook of Geochemistry,” (Wedenpohl, K.H., Ed.), Vol.11/5, Chapter 42. Springer Verlag, Berlin, New York (1974).
2
3. M.J. O'Neil, A. Smith, P.E. Heckelman, In: “The Merck index. An encyclopedia of chemicals, drugs, and biologicals,” Whitehouse Station, NJ: Merck Research Laboratories, 1748 (2001).
3
4. J. Vucina and R. Han , “Production and therapeutic use of rhenium-186, 188 the future of radionuclides,” Med Pregl. 56, 362-365 (2003).
4
5. W. Sahle, S. Krantz, B. Christensson, “Preliminary data on hard metal workers exposed to tungsten oxide fibers,” Sci Total Environ. 191, 153-167 (1996).
5
6. L.P. Wackett, A.G. Dodge, L.B.M Ellis, “Microbial Genomics and the Periodic Table,” Appl and Environ Microbiol. 70, 647-655 (2004).
6
7. D.H. Nies, “Microbial heavy-metal resistance,” Appl Microbiol Biotechnol. 5, 730-750 (1999).
7
8. A.I. Zouboulis, M.X. Loukidou, K.A. Matis, “Biosorption of toxic metals from aqueous solutions by bacteria strains isolated from metal-polluted soils,” Process Biochemistry. 39, 909-916 (2004).
8
9. B. Volesky, “Biosorbent Materials,” Biotechnol. Bioeng. Symp. 16,121-126 (1986).
9
10. N. Liu, J. Liao, S. Luo, Y. Yang, J. Jin, T. Zhang, P. Zhao, “Biosorption of 241Am by immobilized Saccharomyces cerevisiae,” J. Radioanalytical and Nuclear Chemistry. 258, 59-63 (2003).
10
11. J.G. Holt, N.R. Krieg, P.H.A. Sneath, J.T Staley, S.T. Williams, “Bergey’s Manual of Systematic Bacteriology”, Vol. 1–4. Williams and Wilkins, Baltimore (1989).
11
12. E.P. Welsch, “A rapid geochemical spectrophotometric determination of tungsten with dithiol,” Talanta. 30, 876-878 (1983).
12
13. A. Lopez, N. Lazano, J.M. Priego, A.M. Marqus, “Effect of pH on the biosorption of Nickel and other heavy metals by Pseudomonas fluoresces 4F39,” J. Industerial. Microbiol & Biotechnol. 24, 146-151 (2000).
13
14. A.M. Marqus, X. Roca, M.D. Simon-Pujuol, M.C. Fuste, F. Congregado, “Uranium accumulation by Pseudomonas sp. EPS 5028,” Appli. Microbiol. Biotechnol. 35, 406-410 (1991).
14
15. M.P. Pons and M.C. Fuste, “Uranium uptake by immobilized cell of Pseudomonas strain EPS 5028,” Appli. Microbiol. Biotechnol. 39, 661-665 (1993).
15
N. Goyal, S.C. Jain, U.C. Banerjee, “Comparative studies on the microbial adsorption of heavy metals,” Advances in Environmental Research 17-7, 311-319 (2003).
16
ORIGINAL_ARTICLE
Induction Mutation in Tangerine for Creating Genetic Variation to Produce Mutants With Desirable Character (using gamma rays)
Genetic variation is an essential factor for the crop breeding. Induced mutations are highly effective to enhance the natural genetic resources, and have assisted in developing the improved cultivars of fruits and other crops. The recent advances in biotechnological techniques have the potential to provide efficient methods of vegetative propagation, screening techniques and genetic improvement through the mutation. On this basis, we selected tangerine (Celemantin cv) as a well-adapted, and highly consumed citrus fruit which has a disadvantage of containing too many seeds in it's flash. We applied physical mutagen (γ-ray) with dose rates of (35,40 and 45 Gy) for lateral bud after shoot tip grafting (stg) and production of contaminated-free plants. The irradiated buds were grafted to sour orange as root stocks (M1V1) and chimera dissolved by further vegetative propagation. Finally, the M1V3 plants were transferred to the field and after the production of the fruits, selection has been made. The results have showed that radiation was able to produce seedless, early and late ripening and cold resistance samples. Tangerine (Clemantine Cv) has also shown that it possesses a high yield of production.
https://jonsat.nstri.ir/article_691_4c000421fee3dcab32a2dd1fba3ff6ec.pdf
2006-08-23
29
34
Mutation
Citrus
STG
Induced Mutation
Somatic Mutations
In Vitro
Mutagens
M
Rahimi
1
مرکز تحقیقات کشاورزی و پزشکی هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 498-31485، کرج - ایران
LEAD_AUTHOR
F
Majd
2
مرکز تحقیقات کشاورزی و پزشکی هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 498-31485، کرج - ایران
AUTHOR
E
Jahangirzadeh
3
مرکز تحقیقات کشاورزی و پزشکی هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 498-31485، کرج - ایران
AUTHOR
S
Vedadi
cvedadi@nrcam.org
4
مرکز تحقیقات کشاورزی و پزشکی هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 498-31485، کرج - ایران
AUTHOR
E
Rahmani
5
مرکز تحقیقات کشاورزی و پزشکی هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 498-31485، کرج - ایران
AUTHOR
N
Neshan
6
مرکز تحقیقات کشاورزی و پزشکی هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 498-31485، کرج - ایران
AUTHOR
1. ر. فتوحی قزوینی، ”تولید کلونهای عاری از ویروس ارقام نارنگی انشو از طریق کشت تخمکهای نارس شده،“ انتشارات دانشگاه گیلان (1377).
1
2. ح. شیبانی،”باغبانی،“ جلد چهارم. مرکز نشر سپهر (1342).
2
3. L. Navarro, “Citru shoot tip grafting in vitro,” In: Biotechnology in Agriculture and Forestry, Vol. 18, Bajaj, Y.P.S. (ed). Springer Verlag, Berlin Heidelberg (1991).
3
4. S. Bhoswanis and M.K Razdan, “Plant Tissus Culture,” Elsevier, (1983).
4
5. Donini, “Mutagenesis applied for the improvement of vegetgetively propagated plants,” International Atomic Energy Agency, (1994).
5
6. M.H. Edriss and D.W. Burger, “Micrografting shoot tip culture of Citrus on three trifoliata rootstock,” Sci. Hort, 23,255-259 (1984).
6
7. A. Starrantino, and A. Caruo, “The shoot tip grafting technique applied in citriculture,” Acta Hort, (1988).
7
8. V.A. Parthasaarathy, V. Nagaraju, S.A.S. Rahman, “In vitro grafting of Citrus reticulate Blanco,” Folia. Hort, 9/2, 87-90 (1997).
8
9. P. Boxus, P. Druart, “Virus-free trees through tissue culture,” In: Biotechnology in Agriculture and Forestry. Vol. 1. Bajaj, Y.P.S. (ed). Springer-Verlag, Berlin Heidelberg (1986).
9
10. R. Jonard, “Micrografting and its applications to tree improvement,” In: Biotechnology in Agriculture and Forestry. Vol. 1. Bajaj, Y.P.S. (ed). Springer-Verlag, Berlin Heidelberg, (1986).
10
ORIGINAL_ARTICLE
Recovery of Mo-98 Enriched Stable Isotope from Graphite Collector of EMIS and its Chemical Purification
Recovery and chemical purification of Mo-98 from graphite collector which was separated by EMIS were made for the first time in Iran. In this research work, metallic Mo-98 isotope deposited on the internal surface of graphite was separated from pocket by scraping. Then, carbon was removed from the mixture of molybdenum and graphite by burning at 850ºC in oxygen atmosphere in the form of CO2 and molybdenum was converted to oxide form (MoO3). Molybdenum tri-oxide was dissolved in hot and concentrated ammonia solution. In alkaline condition, the major impurity of Fe as hydroxide form was precipitated. In the next step, after acidifying the solution by sulfuric acid, α-benzoin oxime was added, and molybdenum organometalic complex was formed. The complex was filtrated, dried and ignited at 500ºC in electrical furnace. Finally, 98MoO3 was obtained. The crystalline structure of MoO3 was confirmed by X-ray Diffraction (XRD) and its chemical purity of 97.44% was determined using the ICP-emission spectrometer.
https://jonsat.nstri.ir/article_692_ef519f37349ccba7eb16e89a1eeaffa0.pdf
2006-08-23
35
38
Recovery
Chemical Purification
Mo-98
Graphite Collector
α-Benzoin Oxime
J
Garousi
1
مرکز تحقیقات کشاورزی و پزشکی هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 498-31485، کرج - ایران
LEAD_AUTHOR
H
Noorkojouri
2
مرکز تحقیقات کشاورزی و پزشکی هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 498-31485، کرج - ایران
AUTHOR
P
Sarabadani
psarabadani@yahoo.com
3
مرکز تحقیقات کشاورزی و پزشکی هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 498-31485، کرج - ایران
AUTHOR
B
Zeinali
4
مرکز تحقیقات کشاورزی و پزشکی هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 498-31485، کرج - ایران
AUTHOR
1. ا. علیپور، ”مباحثی از رادیو فارماسی دانشگاه اصفهان،“ 237، (1368).
1
2. Boyd Weaver, “Electromagnetic separation of isotopes,” Chemical Refinement Procedures in Oak Ridge National Laboratory Report, Aug. 8, (1955).
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3. F. Albert Cotton, Geoffrey Wilkinson, Paul L. Gaus.,“ Basic Inorganic Chemistry,” Wiley, 3rd Edition, 529, (1995).
3
4. Arthur Israel Vogel, “Vogel's textbook of quantitative inorganic analysis: including elementary instrumental analysis,” Longman, 5th edition, 611, (1996).
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6. D.Wu, S. Landsberger, B.A. Buchholz, G.F. Vandegrift, “Processing of Leu Target for Mo-99 production testing and modification of the cintichem process,” 1995 International Meeting on Reduced Enrichment for Research and Test Reactor, paris. France sep. 18-21, (1994).
6
ORIGINAL_ARTICLE
Application of the Fourier and Wavelet Transforms in Noise Reduction of the out of the Ordinary Data
In this article the noise reduction of the experimental data by the Fourier and the wavelet transforms has been investigated. Using both simulated and experimental data (from the plasma focus facility, Dena), the sensitive features of the application of the Fourier transform are visualized and discussed. Then, the main idea of the wavelet transform and the results of the noise reduction with this transform are presented. Due to this investigation, for the cases such as the current derivative of the Dena facility, where the reliability of the Fourier transform can be doubtful, the wavelet transform can be considered as a more accurate alternative approach.
https://jonsat.nstri.ir/article_693_79165deddd609f6816b3877a8d33c2b2.pdf
2006-08-23
39
43
Noise
Fourier Transform
Wavelet
Plasma Focus
M.A
Tafreshi
1
مرکز تحقیقات گداخت هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 1339-14155، تهران - ایران
LEAD_AUTHOR
Y
Sadeghi
ysadeghi@aeoi.org.ir
2
مرکز تحقیقات گداخت هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 1339-14155، تهران - ایران
AUTHOR
1. M.A. Tafreshi, M. Farrahi et. al, “Dena a new PF device,” Nukleonika, 46 (Supplement1), S85-S87 (2001).
1
2. V. Siahpoush, S. Sobhanian, M.A. Tafreshi, et. al, “A model for plasma evolution in Filippov type plasma focus facilities,” Iranian Journal of Science & Technology, Transaction A, Vol. 27, No. A2, Summer (2003).
2
3. V. Siahpoush, M.A. Tafreshi, S. Sobhanian, S. Khorram, “Adaptation of Sing Lee’s model to the Filippov type plasma focus geometry,” Plasma Phys and Control, Fusion 47 1065-1075 (2005).
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4. C. Kittel, “Introduction to solid state physics,” 5th edition, John Wiley & Sons, ISBN 0-471-49024-5 (1976).
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7. A.B. Carlson, “Communication Systems,” Mc-Graw-Hill, New York (1968).
7
8. J.B. Thomas, “Statistical Communication Theory,” Wiley, New York (1969).
8
9. J.W. Cooley, P.A.W. Lewis, P.D. Welch, “Historical Notes on the Fast Fourier Transform,” IEEE Trans. On Audio and Electroacoustics, Vol. AU-15, No. 2. 76-79 (1967).
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10. J.W. Cooley, P.A.W. Lewis, P.D. Welch, “Application of the Fast Fourier Transform to Computation of Fourier Integrals,” IEEE Trans. on Audio and Electroacoustics, Vol. AU-15, No. 2, 79-84 (1967).
12
11. J.W. Cooley and J.W. Tukey, “An Algorithm for the Machine Calculation of Complex Fourier Series,” Math of Comput, Vol. 19, 297-301 (1965).
13
12. S. Mellat, “A theory for multi-resolution signal decomposition: the wavelet representation,” IEEE Trans. on Pattern Anal. And Machine Intelligence, Vol.11, No.7, 674-693 (1989).
14
13. G.P. Nason, B.W. Silverman, “The stationary wavelet transform and some statistical applications,” Lecture Notes in Statistics, 103, 281-299 (1995).
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15. P. Flandrin, “Wavelet analysis and synthesis of fractional Brownian motion,” IEEE Trans. on Inf. Theory, Vol. 38, 910-917 (1992).
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“Wavelet Analysis,”م.ا. تفرشی، ی. صادقی، پژوهشکده فیزیک پلاسما و گداخت هستهای، گزارش علمی-فنی، شماره 6-84013 (1384).
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