Abstract The aim of this study was to evaluate the artificial and natural radiation dose levels in coastal areas Trabzon–Rize–Artvin provinces 38 years after Chernobyl nuclear accident. Radioactive 232 Th, 238 U, 40 K 137 Cs concentrations were determined 49 soil samples by HPGe gamma spectrometry. Average 12 Bqkg −1 for 15 162 37 Cs. Annual effective equivalents excess lifetime cancer risk values are below world average. This also presents average value measured same area from 1990–2004–2024.

The current study presents the results of activity radionuclides in spa waters, and evaluates their radiological influences on population consuming these waters Central Eastern Black Sea regions Turkey. Since are used for therapy consumption purposes unconsciously, impact people was computed by taking into consideration annual intake through ingestion 226Ra, 232Th, 40K, 137Cs 222Rn. mean activities were estimated to be 11.35 gross alpha, 6.23 beta, 2.96 0.42 0.069 137Cs, 0.19 267 Bq L–1...

Middle East Technical University – Defocusing Beam Line (METU-DBL) project is an irradiation facility providing 15 MeV to 30 kinetic energy protons for testing various high radiation level applications, ranging from Hi-Lumi LHC upgrade, space electronic components nuclear material research. The located inside the premises of TAEA (Turkish Atomic Energy Agency) SANAEM (Saraykoy Nuclear Education and Research Center) close Ankara, provides users a wide selectable flux menu (10 5 –10 10 p/cm 2...

Satellites and spacecrafts are exposed to space radiation environment during their mission. This consists of cosmic rays, solar particles trapped particles. Cosmic rays coming from the outside our system. Solar produced by Sun. These can be around Earth's magnetic field lines when they approach atmosphere. affect performance robustness electronic components or materials used in such effects classified as Total Ionising Dose (TID), Single Event Effect (SEE) Displacement Damage (DD). To ensure...

ABSTRACT In this study, 5, 10, and 15 wt% colemanite (Ca 2 B 6 O 11 ‐5H O) Bi 3 filled high‐density polyethylene (HDPE) composites were fabricated by conventional melt extrusion processing techniques in the form of a layered structure to absorb both neutron radiation secondary resulting from neutron‐induced reactions. structure, HDPE was used slow down neutrons, while trap thermal neutrons gamma respectively. The properties colemanite/HDPE /HDPE investigated scanning electron microscopy...

In this study, 137Cs specific activities were measured in surface soil samples collected from undisturbed areas over the eastern part of Black Sea coast line Turkey, between Trabzon and Hopa, August 2004 January 2005. A total number 41 counted using an HpGe spectrometer system. The results indicate that levels show a large variation ranging 10 Bq/kg 1000 Bq/kg. are generally higher coast. Exposure rates above ground due to activity estimated vary 0.1mR/s 9 mR/s.

METU Defocusing Beamline (DBL)is being installed at TAEA SANAEM Proton Accelerator Facility [1] for radiation tests of electronic devices to be used in satellites and spacecrafts which are exposed a high dose space or the Hi-Lumi LHC [2]. 15 - 30 MeV protons from accelerator spread out over an area 15.40 × 21.55 cm provide large irradiation accordance ESA/ESCC No. 25100 standard with METU-DBL. A wide selectable flux menu ranging 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...

Indoor radon and soil radioactivity levels were determined for Erzincan province in Turkey. concentrations 89 dwellings using CR-39 passive Solid State Nuclear Track Detectors (SSNTDs) four seasons. The mean annual 222 Rn activity concentration was found to be 119 Bq.m −3 . In the winter season, indoor showed highest values while lowest observed summer season. A model used predict number of lung cancer incidences due inhalation radon. findings have indicated that is responsible 13% occurring...

This descriptive study was conducted to identify the motivation levels of university students, factors affecting their motivation, and students' opinions concerning professions. The sample consisted 211 students attending Vocational School Health Services. Data were assembled using a “Questionnaire Form” “Motivation Sources Problems Scale”. Frequency, percentage, arithmetic mean values, chi-square, independent group Student t-test, Mann Whitney U, ANOVA, Kruskal Wallis tests used for data...

Neutron shielding is of utmost importance in radiation environments such as nuclear reactors and particle accelerators fields health physics. In this work, the percentages neutrons stopped by shields comprising boron minerals (HDPE/B2O3, Epoxy/Priceite, Epoxy/Colemanite, Epoxy/Kernite) their composition against neutron different energies investigated using two separate MC simulations. Different layer combinations epoxy based borated materials with HDPE sheets were then simulated to find...

In the present study, radionuclide and radon concentrations were measured in drinking water samples collected Andon springs Rize Drinking Water Treatment Facility located at province Eastern Black Sea Region Turkey soil same regions. Radionuclide activity with gamma ray spectrometry, 238U, 232Th, 40K 137C determined. Annual effective dose equivalents calculated based on results. Radon concentration measurements for region conducted a gas analyzer (Alpha Guard PQ 2000PRQ). All levels values...

Bu çalışmada KTÜ Kanuni Kampüsünde ofislerde radon gazı seviyesi ölçülmüş ve çalışanlar için radondan kaynaklanan doz eşdeğerleri tahmin edilmiştir. Radon ölçümleri 30 ofiste yapılmıştır. Ölçümler üçer katlı on binanın her bir katında yapılmış katlara göre değerleri karşılaştırılmıştır. Çalışanlar zamanının çoğunu ofislerinde geçirdikleri ölçümü önemlidir. ALPHAGUARD PQ 2000 monitörü ile sonuçlar uluslararası değerler ölçülen izin verilen limit değerlerin altındadır. Ayrıca seçilen bu 10...

In the present study, radioactivity levels of water samples collected from main supply network in Trabzon province and districts soil taken vicinity were measured. An Alphaguard-PQ2000 radon gas detector was used to determine seasonal level samples. HPGe The average concentration 222Rn drinking ranges 0.56 ± 0.51 13.3 5 Bq L-1. samples, gross alpha beta values measured as 8 1 43 mBq L-1, respectively. concentrations 238U, 232Th, 137Cs, 40K radionuclides 51 2, 21 16 1, 28 7 m-3, 147 5, 25 77...

In this study, the material was formed by adding 5 wt% boron into high density polyethylene to be used in applications containing neutrons.This paper discusses neutron and gamma rays shielding characteristics of HDPE-based composite materials 5% HDPE/colemanite (HDPE/C), HDPE/ulexite (HDPE/U), HDPE/B2O3 (HDPE/B) weight additives were fabricated.The characterizations these determined using scanning electron microscopy (SEM), x-ray diffraction (XRD).The Total macroscopic cross-section each a...

The Middle East Technical University Defocusing Beamline (METU-DBL) is being constructed in order to perform single event effects tests for the electronic components accordance with European Space Agency (ESA) Components Coordination (ESCC) No. 25100 standard. aim of this beamline provide a suitable test area at end using beam elements, such as collimators and magnets. Shielding crucial precaution safety radiation workers protection from detrimental radiation. In METU-DBL, shielding studies...

Electronic components must be tested to allow for safe and reliable missions in radiation environments. The METU Defocusing Beamline (METU-DBL) was installed the R&amp;amp;D room at Particle Accelerator Facility (PAF) of Turkish Energy, Nuclear Mineral Research Agency (TENMAK). This facility established accordance with European Space (ESA), Components Coordination (ESCC), No: 25100 standard conduct proton irradiation tests electronic various materials used space environment. METU-DBL uses...

In this study, 5, 10, and 15 wt% ulexite wt %Bi2O3 filled high density polyethylene (HDPE) composite materials were fabricated through conventional melt-extrusion processing techniques in the form of a layered structure order to absorb both neutron radiations secondary resulting from radiation. structure, HDPE was used slow down neutrons, while Bi2O3 capture thermal neutrons gamma radiations, respectively. The properties ulexite/HDPE Bi2O3/HDPE composites investigated scanning electron...

Abstract The Middle East Technical University Defocusing Beamline (METU-DBL) is designed to deliver protons with selectable kinetic energies between 15–30 MeV, and proton flux 10 6 –10 protons/cm 2 /s, on a maximum 21.55 15.40 cm target region beam uniformity within ±6%, in accordance the ESA ESCC No. 25100 specification for single event effects (SEEs) tests low energy range. achieved high fluences, allow users test space-grade materials; electronic circuits, ASICs, FPGAs, optical lenses,...

N THIS study, the gamma-ray attenuation properties of spilitic basalt, andesite, dolomite, limestone and syenite rocks obtained from Trabzon Province its vicinity have been investigated.The mass coefficients radioactivity concentrations considered determined by using coaxial high purity germanium detector (HPGe) system.The capability andesite means shielding for low energy gamma rays has found highest when it is compared with those rocks.In places where were extracted, activities natural...

Dashboards of modern vehicles are often covered with PVC skins, which sometimes made two layers. To ensure safe airbag deployment in case a crash, their individual layer thicknesses must be measured non-destructively directly after manufacturing. For this purpose, we have developed terahertz time-domain spectroscopy system hand-held reflective measurement head.

Bu çalışmada, Karadeniz Bölgesinde az sayıdaki jeotermal kaynaktan birisi olan Fatsa İlçesi, Ilıca Köyü sınırları içerisinde bulunan, Sarmaşık Kaplıcası termal tesisinde radon gazı ölçümleri yapılmıştır. Kaplıca havuz ortamı, resepsiyon, restoran olmak üzere üç kısımda hava ortamında Cr-39 ve Alpha GUARD PQ 2000 dedektörleri yaz kış mevsiminde Yapılan ölçüm sonucunda elde edilen değerleri kullanılarak kaplıca çalışan personel için yıllık etkin doz eşdeğerleri hesaplanmıştır. Ayrıca suyu...