I. Eurasia conference on nuclear science and its application : presentations, 23-27 October 2000. İzmir, Turkey.
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1. Avrasya Nükleer Bilimler ve Uygulamaları Konferansı : bildiriler 23-27 Ekim 2000 İzmir Türkiye
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Browsing I. Eurasia conference on nuclear science and its application : presentations, 23-27 October 2000. İzmir, Turkey. by Issue Date
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Item Automated radiation monitoring and early warning systems network (Resa)(Turkish Atomic Energy Authority, 2000-10) Küçükarslan, Necati; Erdoğan, Adem; Güven, Ahmet; TAEK-ÇNAEMItem Determination of the gross alpha and beta radioactivity levels in Emendere Village (Sındırgı-Balıkesir) drinking water(Turkish Atomic Energy Authority, 2000-10) Doğru, Mahmut; Canbazoğlu, Cumhur; Baykara, Oktay; Külahçı, Fatih; Boz, Adil; 1516; Bölüm YokOver 40 years old 600-700 years old people in good condition live in about 300 houses in Emendere village. Most of drinking and usage water, and 70% of Sindirgi’s (Balikesir) drinking water are supplied by two main natural sources from Emendere. Apart of those sources, restorative water source near the village settlement place is commonly used for bathing. The gross alpha and beta radioactivity levels in Sindirgi’s drinking water are firstly determined by CNAEM (Cckmece Nuclear Research and Training Centre) in 1999. Determined levels were both higher than the limits accepted by WHO (World Health Organisation) and TSE (Turkish Standards Institute) in drinking water. In this study, the gross alpha and beta radioactivity levels in usage and drinking water in the same place are determined by using more sample collected over the village and obtained results are conclude according to the standards determined by WHO and TSE. Ca and Mg concentrations, temperatures and pH are also determined and conclude. A health team from Balikesir State Hospital is also searched through the most of the village population. None of the radiation caused sickness was found during this search.Item The transformation of local structure in fused silica and alkali-borosilicate glasses at separate and combined influence of radiation and high temperature(Turkish Atomic Energy Authority, 2000-10) Abdiyazov, P. Z.; Khaydarova, Kh. A.; Masharipov, K. Yu.; Nuritdinov, I.; Vakhidov, Sh. A.; Bölüm YokItem The present status of safeguards in Turkey(Turkish Atomic Energy Authority, 2000-10) Yılmazer, Ayhan; Yücel, Aysun; TAEK-NGDRepublic of Turkey signed Non-Proliferation Treaty (NPT) in Vienna, Austria on January 28, 1969 and the Treaty was ratified by Turkish Parliament on March 29, 1979. International Atomic Energy Agency (IAEA) and Republic of Turkey signed the Safeguards Agreement on June 30, 1981. Turkey accepted the international safeguards administered by IAEA and at the same time its subsidiary arrangements and Facility attachments were enforced for all nuclear facilities as an Non-Nuclear-Weapon State party to NPT. Regulation on Nuclear Materials Accounting and Control, which was prepared in accordance with Agreement Between the Government of Turkey and IAEA for the application of Safeguard in Connection with the Treaty on NPT, has been put into force since it was published in Official Gazette on September 10, 1997. This study presents the essential futures of national system of accounting for and control of nuclear materials in Turkey.Item Investigation of neutron induced aging of NPP Kozluduy WWER RPV steels(Turkish Atomic Energy Authority, 2000-10) Vodenicharov, St.; Kamenova, Tz.; Bölüm YokItem Proton, neutron and pion induced soft errors in computer memory chips(Turkish Atomic Energy Authority, 2000-10) Peterson, R. J.; Bölüm YokItem Investigation of powder properties of Ce2(C2O4)3.nH20 derived CeO2 for the preparation of (Th,Ce)O2 pellets(Turkish Atomic Energy Authority, 2000-10) Altaş, Yüksel; Çelik, Fatih; Tel, Hüseyin; 11349; Bölüm YokThe preparation conditions and powder properties of cerium oxalates and derived oxide powders were investigated to obtain of high homogeneity and density (Th,Ce)O2 mixed-oxide pellets. For this purpose, Ce2(C2O4)3 nH2O was precipitated from cerium nitrate solutions with an excess of oxalic acid. Thermal decomposition of the Ce2(C2O4)3 nH2O powder was investigated and the conversion temperature to oxide was determined. The effects of different calcining treatments on the physical properties of the oxide powders were evaluated.Item Radiation stability of biodegradable lactic acid polymers(Turkish Atomic Energy Authority, 2000-10) Kantoğlu, Ömer; Özbey, Turan; Güven, Olgun; TAEK-ANTHAMItem Levels of polonium-210 in the grapevine leaves in Alaşehir district of Turkey(Turkish Atomic Energy Authority, 2000-10) Gürboğa, Gülşen; Ölmez Aytaş, Şule; Bölüm YokThe objective of present work is the estimation of Po-210 (polonium) content in the edible grapevine leaves (Vitis vinifera, L.cv Sultana syn.) collected from Gediz plain in Western Turkey. Alaşehir District in Gediz plain is one of the most important wineculture region of Turkey. Grapevine leaves are important food material for Dolma in Turkish cuisine. Dolma is a name applied to such vegetables as grapevina leaves, cabbage leaves and green peppers stuffed groundmeat or spiked rice. Levels of Po-210 in the grapevine leaves had not been analyzed before in Turkey. In this study, after wet ashing of grapevine leaves, Po-210 was spontaneously plated onto a copper disc from dilute hydrochloric acid medium and deposited activity was measured. The results for Po-210 in the grapevine leaves are compared with the other foodstuff values in the literature.Item Preparing an estrogen-derivative compound labeled with Tc-99m and determination of radiopharmaceutical potential(Turkish Atomic Energy Authority, 2000-10) Enginar, Hüseyin; Ünak, Perihan; Yurt, Fatma; Biber, F. Zümrüt; 58588; Bölüm YokIn recent years, estrogen derivative compounds have been used with several purpose which may lead to rapid advances in both diagnosis and therapy of some human cancers. In this study, an estrogen derivative compound (ESTCPTA) that 3,17-( β-estradiolyl propinol attached with 1-(4-methylbenzoic acid)-4,8,11- tetraazacyclotetradecane (CPTA) was synthesized at five steps. Synthesized product was purified by recrystallization in ethyl alcohol. Characterizations of purified products were made by NMR and IR spectroscopy. Synthesized compound was labeled with Tc-99m. RTLC (Radio Thin Layer Chromatography) and radiopaper electrophoresis were used to determine radiochemical yields. Specific activity was approximately 23.7 GBq/mmol and labeling yield was over 95%. Biodistribution studies were performed on female Albino Wistar rats. Rats were sacricified by ether narcotization at certain time intervals and the organs were removed. Their activities were counted by a gamma counter. The activity per gram tissue was calculated and time activity curves were generated.Item The resistive magnetohydrodynamics (MHD) in thermonuclear discharges :theory and experiment(Turkish Atomic Energy Authority, 2000-10) Bayramoğlu, A. Özer; TAEK-ÇNAEMIt has been understood that thermonuclear plasma confinement and behaviour of the plasma was mostly depend upon the magnetic surfaces on which the confining magnetic field and the plasma current he. However magnetic surfaces are not stable and prone to the magnetohydrodynamic(MHD) stabilities and reconnection and finaly they lead to the magnetic island formation. Resistive magnetohydrodynamics and instabilities are reviewed both experimentally and theoretically, among them; tearing mode and mode locking phenomena, topological relaxation (sawteeth oscillation), magnetic island overlap and plasma minor and major distruption.are investigated. The tearing mode growth rate are determined. Magnetic field reconncection on the rational surfaces and magnetic island formation, magnetic island growth rate and plasma confinement relation and energy confinemenet degradation are emphasized: The island width and island evaluation equations are derived. Performance limitation and MHD activities and mode structure m=0,n=0,m=1,n=1 and their sidebands and overlap are reviwed. Plasma distruptive phenomena with up to date experiments are presented.Item A statistical study of filtres used as shielding for PC monitors(Turkish Atomic Energy Authority, 2000-10) Tuğrul, A. Beril; Altınsoy, Nesrin; Ayaz, Birsen; 200243; Bölüm YokIn this paper it was aimed to obtain a radiological study about the attenuation of radiation of PC fdters which are produced by different companies. For this purpose different radiation sources were used for UV (ultraviolet) IR (infrared), visible light and X-ray radiation. For every type of radiation measurements, the most proper detector was selected. The radiation measurements were made with and without fdters and the measurements were taken for different distances. Measurements have bee observed for white & black and coloured monitors radiation levels for X-ray emission. All results were compared according to related regulations. Furthermore all data evaluated statistically in the point of view of public safety.Item Burnup performances of boron nitride and boron coated nuclear fuels(Turkish Atomic Energy Authority, 2000-10) Durmazuçar, Hasan H.; Bölüm YokThe nuclear fuels of urania (UOV and 5% and 10% gadolinia (Gd203) containing U02 previously produced by sol-gel technique were coated with first boron nitride (BN) then boron (B) thin layer by chemical vapor deposition (CVD) and also by plasma enhanced chemical vapor deposition (PECVD) techniques to increase the fuel cycle length and to improve the physical properties. From the cross-sectional view of BN and B layers taken from scanning electron microscope (SEM), the excellent adherence of BN onto fuel and B onto BN layer was observed in both cases. The behavior of fuel bumup, depletion of BN and B, the effect of coating thickness and also Gd203 content on the bumup performances of the fuels were identified by using the code WIMS-D/4 for Pressurized Water Reactor (PWR) and Boiling Water Reactor (BWR) cores. The optimum thickness ratio of B to BN was found as 4 and their thicknesses were chosen as 40 pm and 10 pm respectively in both reactor types to get extended cycle length. The assemblies consisting of fuels with 5% Gd203 and also coated with 10 pm BN and 40 pm B layers were determined as candidates for getting higher bumup in both types of reactors.Item Preparing activated carbon from charcoal and investigation of the selective uranium adsorption(Turkish Atomic Energy Authority, 2000-10) Kütahyalı, Ceren; Eral, Meral; 162663; Bölüm YokItem The effects of hydrogen concentration in reducing atmosphere on microstructure of U02 fuel pellets(Turkish Atomic Energy Authority, 2000-10) Ayaz, Birsen; Bilge, Ali Nezihi; Bölüm YokIn both conventional high temperature and low temperature sintering techniques, hydrogen is used as sintering and reducing atmosphere to prepare uranium dioxide fuel pellets. It is well known that hydrogen is a dangerous gas to work with. In this work it was aimed to investigate the effects of low-level hydrogen concentration used in reducing atmosphere on micro structure of U0 2 fuel pellets produced by low temperature sintering. Different ratios of H2/Ar (0.1%H2+99.9%Ar, 0.5%H2+99.5%Ar, l%H2+99%Ar and 0%H2 (pure argon)) atmospheres were used as reducing atmosphere for 1, 2, 3 and 6 hours. It was determined that using very low-level hydrogen (1%) in reducing atmosphere prevents the formation of other oxides.Item General formulation of standard model the standard model is in need of new concepts(Turkish Atomic Energy Authority, 2000-10) Khodjaev, L. Sh.; Bölüm YokThe phenomenological basis for formulation of the Standard Model has been reviewed. The Standard Model based on the fundamental postulates has been formulated. The concept of the fundamental symmetries has been introduced: To look for not fundamental particles but fundamental symmetries. By searching of more general theory it is natural to search first of all global symmetries and than to leam consequence connected with the localisation of this global symmetries like wise of the standard Model.Item Quality assurance in nuclear fuel manufacture(Turkish Atomic Energy Authority, 2000-10) Zararsız, Sema; Dâra, İlksen Hilâl; TAEK-TDThe establishment of a quality assurance program to guarantee that the procurement, design and manufacture of nuclear fuel assemblies are performed in accordance with the regulatory requirements, codes and standards is an important responsibility of the regulatory authority. In this study, the role of quality control (QC) in quality assurance (QA) systems and the inspection procedures of the quality assurance program which are to be performed during the production of pellets, manufacturing of cladding and assembling of the fuel elements will be discussed in details giving a specific example for a selected reactor system.Item Illicit trafficking of radioactive materials and regulatory issues in Turkey(Turkish Atomic Energy Authority, 2000-10) Uslu, İbrahim; Birol, Erdener; 139698; TAEK-RSGDThe recycle and reuse of materials have been increasing during recent years, particularly because of recognition of the economic opportunities presented, but also because of an increased societal awareness of the desirability of conserving raw materials and natural resources. Lost, stolen and abandoned sources appearing in recycled metals constitute a world wide problem. Radioactive sources sometimes incorporate into scrap metal for subsequent recycling. Most of these incidents have resulted in significant levels of radioactive contamination with the attendant risks to employees and the general public. During the past decade there have been numerous accidents where these shielded sources have been accidentally mixed with scrap metal, and have been subsequently melted or ruptured particularly in steel making process. For controlling of incoming trucks and trains in case the presence of radioactive sources hidden in the scrap, there is a need to establish a radiation detecting system. In Turkey in addition to pocket sized or handheld radiation monitors, fixed or mobile panel detection systems will also be used in the detection of illicit trafficking of radiation sources and contaminated scrap material. But besides this activity; training courses have been carried out to improve the knowledge and skills of workers and the customs officers dealing with radiation sources and scrap materials.Item Radiometric surveys for radioactive mineral exploration and environmental investigations in Turkey(Turkish Atomic Energy Authority, 2000-10) Aydın, İbrahim; Karat, Halil İ.; Tümer, Aykut; TAEK-TDMineral Research and Exploration Institute of Turkey (MTA), an governmental organization utilized the radiometric method in radioactive mineral exploration particularly in uranium exploration very early in 1953. It applied radiometric method terrestrially and aerial. Results of these surveys were very beneficial for further detailed geological, geophysical and drilling operations.Item Clinical evaluation of GLY-GLY-Alanine and same group peptides labeled with 99mTc(Turkish Atomic Energy Authority, 2000-10) Taner, Memduh Sami; Özdemir, Durmuş; Duman, Yusuf; 99mTc; Bölüm YokIn this study, seven different (six of them with -N H and one of them with -NHSH side chain) peptides (Gly-l-Hystidine, Gly-l-Methionine, Gly-l-Tyrosine, Gly-Gly-l-Alanine, Gly-l-leucine amide, Gly-l-Glutamic acid, Gly-l-Gly-amide) were selected. For the positive control, tetraglycin (Gly-Gly-Gly-Gly) was chosen and for each of them, " mTc labeling studies have been performed using both direct and ligand exchange methods. Among these peptides, two of them (Gly-Gly-l-Alanine (GGA) and Gly-l-leucyl amide(GLA)) were labeled with the yields that were close to the USP acceptance criterions. Quality control has been performed by reverse phase HPLC analysis method with the use of a Beckman-Gold Radio-HPLC system. Latter on, radiopharmaceutical distribution and organ uptake characteristics of these peptides (" mTc-GGA and 99mTc-GLA) on rabbits were studied by using gamma camera imaging technique. Also, animal bio-distribution with GGA and inflammation imaging studies with GLA on rat models with sterile inflammation have been performed. Results indicated that in direct radio-labeling method developed for the small molecule peptides, labeling yields and retention times for " mTcGGA and " mTc-GLA radio-complexes were % 75.09 at 12 minute and % 74.20 at 17.5 minutes, respectively in reverse phase Radio-HPLC analysis. For the rest of the five peptides, direct and ligand exchange labeling methods were unsuccessful to produce a radio-labeled peptide that has an acceptable yield in terms of the radiopharmaceutical quality. Gamma camera imaging studies have indicated that both of the peptides ( " mTc-GGA and " mTcGLA) have demonstrated remarkable rapid blood clearance and dynamic discharge through kidneys. It is possible to say that based on the initial images and renogram data, dynamic kidney imaging can be obtained right after 30 minutes of the application and static kidney scintigrams can be taken by performing late imaging with " mTc-GGA radio-peptide complex. On the other hand, " mTc-GLA complex may have a potential use especially for very clear dynamic kidney and infection imaging studies. In bio-distribution study on rabbits, in terms of radio-peptide retention, the most important organ and body fluid samples were taken and then counted (first with collimated and then with non-collimated gamma camera counting system) with TENELLEC well type detector system. When compared to the other body organs, it was observed that kidneys showed the most active retention and the most of the applied radiopeptide were thrown out through urine. Also, In the infection imaging studies on mouse models with colitis using the same radio-labeled peptides, 99mTc-GLA proved to be more appropriate as indicated by the scintigrams.