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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Radiation Protection and Research
Journal Basic Information
Journal DOI :
Korean Association for Radiation Protection
Editor in Chief :
Volume & Issues
Volume 36, Issue 4 - Dec 2011
Volume 36, Issue 3 - Sep 2011
Volume 36, Issue 2 - Jun 2011
Volume 36, Issue 1 - Mar 2011
Selecting the target year
OSL Age Determination of the Hearths in a Bronze Age Dwelling Site by using Bayesian Statistics
Kim, Myung-Jin ; Yang, Hye-Jin ; Hong, Duk-Geun ;
Journal of Radiation Protection and Research, volume 36, issue 2, 2011, Pages 52~58
OSL dating for three hearths having the sequence of use and discard in No. 29 and 29-1 dwelling sites at Sogol cultural site was carried out. Resulting from the deconvolution of natural CW-OSL decay curve and thermal zeroing test, it was turned out that OSL signal was entirely composed of the heat- and light-sensitive fast component with high photoionization cross-section and all quartz OSL signals were thermally bleached under
which is the minimum temperature related to heating and cooking in Bronze age. After dose recovery test and plateau test, paleodose of each hearth sample was evaluated by using SAR method, and OSL age was determined from the ratio of paleodose to annual dose rate. For the purpose of the precision improvement of OSL age, Bayesian statistics was applied to each hearth's age and the archaeological sequence information. Finally, it could be concluded to the accurate use period of each hearth from the resultant OSL ages.
MCNPX Simulation of Scattered Neutron Distribution in Experimental Room for the Neutron Reference Field of Monoenergetic Neutron below 2.5 MeV
Park, Jung-Hun ; Kim, Gi-Dong ;
Journal of Radiation Protection and Research, volume 36, issue 2, 2011, Pages 59~63
It is important to reduce indirect scattered neutron beside direct neutron of chosen energy for designing a neutron-reference-field laboratory with neutron produced from a nuclear reaction by a accelerator. Therefore MCNPX simulation was performed with various conditions for obtaining such condition. At first in the original laboratory condition we calculated the direct neutron flux which was inserted in chamber (virtual chamber composed of air) of 0 degree (proton moving direction) for neutron flux measurement and the scattered neutron flux which is inserted in the chamber after scattering wall or bottom. In the result, the scattered neutron which was inserted after scattering bottom is more than that which was inserted after scattering the others. Therefore MCNPX simulation was again performed with removing the concrete bottom and with removing the concrete bottom and digging 1 m in the ground. In the result of removing concrete bottom and digging 1 m in the ground, scattered neutron which was inserted after scattering bottom became less than that which was inserted after scattering the others.
Intercomparison Exercise on Internal Dose Assessment in Korea
Lee, Jong-Il ; Kim, Jang-Lyul ; Kim, Bong-Hwan ;
Journal of Radiation Protection and Research, volume 36, issue 2, 2011, Pages 64~70
The intercomparison exercise on internal dose assessment has been carried out for the purpose of the evaluation for harmonization of internal dosimetry between the nuclear-related institutes in Korea. The exercises of 9 items on internal dose assessment have been developed for the unknown internal dosimetric parameters such as the intake pathway, absorption type, AMAD, and intake time of a radionuclide. Solutions to these exercises were reported by 7 participants from 5 institutes. The range of the ratio between the individual values and the geometric mean value of the evaluated doses for the exercises was
~ 9.81. But without the extreme partial solution, the range of the ratio was 0.216 ~ 3.12.
Evaluation and Consideration on Environmental Radiation Analysis of Yeong-Gwang Nuclear Power Plant Site Inside&Outside(2000~2009 year)
Han, Sang-Jun ; Lee, Seung-Jin ; Lee, Goung-Jin ; Lee, Na-Young ; Kim, Hee-Gang ; Mun, Ji-Yeon ;
Journal of Radiation Protection and Research, volume 36, issue 2, 2011, Pages 71~78
Yeong-Gwang N.P.P Private Environment Supervisory Organization analyzed over 3,000 samples including 10 marine and 24 land samples from the year 2,000 to 2009. According to the results of the analysis, artificial nuclides that resulted from the effect of Yeong-Gwang Nuclear Power Plant operations were not detected in most samples. However, from the rain and seawater samples, which were taken from inside the plants such as the intake, the discharge and the observatory,
was detected although it was below the regulation level. The
concentration detected in the rain taken from the observatory, by the yearly average criterion, was 30.5~40.0
, which is around 20 times the
concentration detected in the surroundings of the power plants, but it is 0.1% of the regulation level of 40,000
concentration detected in the seawater taken from the intake and the discharge, by the yearly average criterion, was 2.75~17.8
, which means the concentration detected in the discharge is about 140~280% higher than that detected in the intake except the year 2006. Based on these results, it was determined that, although lower than the regulation level, the
in gas and liquid form detected in the rain and seawater sampled from the observatory and the discharge was released into the environment from the power plants. Therefore, regular monitoring and analysis is required on the level of
in the observatory and the discharge.
Clinical Apply of Dual Energy CT (kVp switching) : A Novel Approach for MAR(Metal Artifact Reduction) Method
Kim, Myeong-Seong ; Jeong, Jong-Seong ; Kim, Myeong-Goo ;
Journal of Radiation Protection and Research, volume 36, issue 2, 2011, Pages 79~85
OThe purpose of this article was to measure and compare the value of the metal artifact reduction (MAR) algorithm by Dual energy(kVp switching) CT (Computed Tomography) for non using MAR and we introduced new variable Dual energy CT applications through a clinical scan. The used equipment was GE Discovery 750HD with Dual-Energy system(kVp switching). CT scan was performed on the neck and abdomen area subject for patients. Studies were from Dec 20 2010 to Feb 10 2011 and included 25 subject patients with prosthesis. We were measured the HU (Hounsfield Unit) and noise value at metal artifact appear(focal loss of signal and white streak artifact area) according to the using MAR algorithm. Statistical analyses were performed using the paired sample t-test. In patient subject case, the statistical difference of showing HU was p=0.01 and p=0.04 respectively. At maximum black hole artifact area and white streak artifact area according to the using MAR algorithm. However noise was p=0.05 and p=0.04 respectively; and not the affected black hole and white streak artifact area. Dual Energy CT with the MAR algorithm technique is useful reduce metal artifacts and could improve the diagnostic value in the diagnostic image evaluation of metallic implants area.
Measurement of Skin Dose for Rectal Cancer Patients in Radiotherapy using Optically Stimulated Luminescence Detectors (OSLDs)
Im, In-Chul ; Yu, Yun-Sik ; Lee, Jae-Seung ;
Journal of Radiation Protection and Research, volume 36, issue 2, 2011, Pages 86~92
This study used the optically stimulated luminescence dosimeters (OSLDs), recently, received the revaluation of usefulness in vivo dosimetry, and the diode detecters to measure the skin dose of patient with the rectal cancer. The measurements of dose delivered were compared with the planned dose from the treatment planning system (TPS). We evaluated the clinical application of OSDs in radiotherapy. We measured the calibration factor of OSLDs and used the percent depth dose to verified, also, we created the three point of surface by ten patients of rectal cancer to measured. The calibration factors of OSLD was 1.17 for 6 MV X-ray and 1.28 for 10 MV X-ray, demonstrating the energy dependency of X-ray beams. Comparison of surface dose measurement using the OSLDs and diode detectors with the planned dose from the TPS, The skin dose of patient was increased 1.16 ~ 2.83% for diode detectors, 1.36 ~ 2.17% for OSLDs. Especially, the difference between planned dose and the delivery dose was increased in the perineum, a skin of intense flexure region, and the OSLDs as a result of close spacing of measuring a variate showed a steady dose verification than the diode detecters. Therefore, on behalf of the ionization chamber and diode detecters, OSLDs could be applied clinically in the verification of radiation dose error and in vivo dosimety. The research on the dose verification of the rectal cancer in the around perineal, a surface of intense flexure region, suggest continue to be.
Protective Effect of HemoHIM on Epidermal Melanocytes in Ultraviolet-B irradiated Mice
Lee, Hae-June ; Kim, Jong-Choon ; Moon, Chang-Jong ; Jung, U-Hee ; Park, Hae-Ran ; Jo, Sung-Kee ; Jang, Jong-Sik ; Kim, Tae-Hwan ; Kim, Sung-Ho ;
Journal of Radiation Protection and Research, volume 36, issue 2, 2011, Pages 93~98
We induced the activation of melanocytes in the epidermis of C57BL/6 mice by ultraviolet-B (UV-B) irradiation, and observed the effect of an herbal preparation (HemoHIM, HH) on the formation, and decrease of UV-B-induced epidermal melanocytes. C57BL/6 mice were irradiated by UV-B
) daily for 7 days, and HH was intraperitoneally, orally or topically applied pre- or post-irradiation. For the estimation of change of epidermal melanocytes, light microscopic observation with dihydroxyphenylalanine (DOPA) stain was performed. Split epidermal sheets prepared from the ear of untreated mice exhibited 13~15 melanocytes
, and one week after UV irradiation, the applied areas showed an increased number of strongly DOPA-positive melanocytes with stout dendrites. But intraperitoneal, oral or topical treatment with HH before each irradiation interrupted UV-B-induced pigmentation and resulted in a marked reduction in the number of epidermal melanocytes as compared to the number found in UV-B-irradiated, untreated control skin. The number and size of DOPA-positive epidermal melanocytes were also significantly decreased in intraperitoneally injected or topically applicated group after irradiation with HH at 3rd and 6th weeks after irradiation. The present study suggests the HH as inhibitor of UV-B-induced pigmentation, and depigmenting agent.
Trends and Issues in Metabolism and Dosimetry for Tritium Intake
Kim, Hee-Geun ; Kong, Tae-Young ; Jeong, Woo-Tae ;
Journal of Radiation Protection and Research, volume 36, issue 2, 2011, Pages 99~106
Tritium is the one of the most important radionuclide for workers in nuclear power plants (NPPs) and the public, from the dosimetric point of view. Humans are likely to have internal radiation exposure by tritium inhalation. Radiation exposure by tritium accounts for approximately 7% and 60~90% of the total radiation exposure of NPP workers and the public during normal operation, respectively. Thus, many researches have been conducted to estimate the internal dose by tritium precisely in the world. In terms of tritium dosimetry, this paper provides the current status of research for tritium metabolism and dosimetry.