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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 31, Issue 4 - Dec 2006
Volume 31, Issue 3 - Sep 2006
Volume 31, Issue 2 - Jun 2006
Volume 31, Issue 1 - Mar 2006
Selecting the target year
Radioprotective Effect of Extracts from Plants Indigenous to Korea
Kang Kyoung-Ah ; Zhang Rui ; Chae Sung-Wook ; Piao Mei Jing ; Shin Tae-Kyun ; Lee Nam-Ho ; Park Jae-Woo ; Hyun Jin-Won ;
Journal of Radiation Protection and Research, volume 31, issue 3, 2006, Pages 115~122
We have screened the cytoprotective effect on
-ray radiation induced oxidative stress from eighteen Korean plant extracts. Querus salicina, Clerodendron trichotomum, Lamium amplexicaule, Lozoste lancifolia and Malus baccata were found to scavenge 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical and intracellular reactive oxygen species (ROS). As a result, extracts of these plants reduced cell death of Chinese hamster lung fibroblast (V79-4) cells induced by
treatment. In addition, these extracts protected cell death of V79-4 cells damaged by
-ray radiation. In addition, these extracts scavenged ROS generated by radiation. Taken together, the results suggest that Quercus salicina, Clerodendron trichotomum, Lamium amplexicaule, Lozoste lancifolia and Malus baccata protect V79-4 cells against oxidative damage by radiation through scavenging ROS.
Development of the ZnS(Ag)/BC-408 phoswich detector for monitoring radioactive contamination inside pipes
Kim, Gye-Hong ; Park, Chan-Hee ; Jung, Chong-Hun ; Lee, Kune-Woo ; Seo, Bum-Kyoung ;
Journal of Radiation Protection and Research, volume 31, issue 3, 2006, Pages 123~128
A small radiation detection system is necessary for the direct characterization of alpha/beta-ray contamination inside pipes generated during the decommission of a nuclear facility. In this work, the new type phoswich detector consisting of the ZnS(Ag) and plastic scintillator for
simultaneous counting was designed as part of a development of a equipment capable of monitoring radiological contamination inside pipes. The optimum counting conditions in dimensions of scintillator and a detection system were experimentally confirmed and a performance of alpha/beta-ray discrimination was evaluated. As a result, optimum conditions of a detector suitable for monitoring radiological contamination inside pipes and a feasibility of application to pipe-inside were confirmed.
Development of a TL pellet based on
for Neutron Measurement
Yang, Jeong-Seon ; Lee, Jeong-Il ; Kim, Jang-Lyul ; Kim, Bong-Hwan ; Sou, Dong-Sup ;
Journal of Radiation Protection and Research, volume 31, issue 3, 2006, Pages 129~134
A TL pellet for a neutron dose measurement (KCT-306) by embedding a
-compound into a
phohphor was developed based upon the technical information of KCT-300. The KCT-300 is an another kind of
TL detector shich was developed at KAERI, in which small amounts of
have been emvedded as a binding material. This paper presented the optimized manufacturing condition of KCT-306 and compared its sensitivity with that of the commercialized neutron TL pellets.
Phosphor with grain size ranging less than
are used for the KCT-306. The optimum
-compounds and P-compound as the binding material are determined as 20-40wt%, 50-70wt% and 20wt%. The TL pellet combination of our KCT-306/KCT-300, TLD-600/TLD-700 and TLD-600H/TLD-700H(Harshaw) have been irradiated in the neutron/gamma mixed fields from a
neutron source. The KCT-300, TLD-700 and TLD-700H were used at the same time as gamma ray discriminators in the neutron/gamma mixed fields. It was found that the neutron/gamma response ratios of KCT-306/KCT-300, which were developed in this study, were approximately 4 times higher than those of the commercial TLD-600H/TLD-700H.
Potential Errors in Committed Effective Dose Due to the Assumption of a Single Intake Path in Interpretation of Bioassay Results
Lee, Jong-Il ; Lee, Jai-Ki ;
Journal of Radiation Protection and Research, volume 31, issue 3, 2006, Pages 135~140
Intakes of radionuclides through both inhalation and ingestion pathways may occur particularly in an incident involving unsealed radionuclides. If one assume only one intake path in this case, which is usual in routine monitoring, a significant error in the evaluated committed effective dose(
) may result. In order to demonstrate the potential errors, variations of the resulting committed effective doses were analyzed for different fractions of the inhaled activities to the total intake of
. Simulated bioassav measurements for the lungs, urine and feces were generated based on the biokinetic model and data of the radionuclide, 5
AMAD and absorption type M for inhalation, for various inhalation fractions. The potential errors in
due to the assumption of one intake path were in the range from -100% to as large as +34,000% when the bioassays were made 3 days after the intakes. Larger errors are expected when only the feces assay is applied while inhalation intake exists. A strategy which employs two types of bioassay was proposed to reduce the error caused by a misjudgement of the intake path.
Survey of radioactive contamination in imported foodstuffs
Lee, Wan-No ; Lee, Haeng-Pil ; Chung, Kun-Ho ; Kim, Hee-Reyoung ; Cho, Young-Hyun ; Choi, Geun-Sik ; Lee, Chang-Woo ; Chung, Hyung-Wook ; Lee, Eun-Ju ; Sho, You-Sup ; Lee, Jong-Ok ;
Journal of Radiation Protection and Research, volume 31, issue 3, 2006, Pages 141~148
Surveys of radioactive contamination were performed for imported foodstuffs in 2003. The following samples among imported foodstuffs were selected from markets and Korea Food and Drug Administration(KFDA); the imported samples from country associated with the Chernobyl nuclear accident, the samples produced around the nuclear power plants or nuclear tests, the foodstuffs reported as radioacitive contamination materials in foreign country. After pretreatments such as drying and homogenization, samples were analyzed. The
radionuclide was only measured among the regulation radionuclides(
) of food code. All foodstuffs except Inonotus Obliquus(Chaga mushooms) are less than 17.0 Bq/kg or below the minimum detectable activity(MDA). The activity concentrations of Chaga mushrooms from Russia ranged up to 131.25 Bq/ltg which is almost 35 % of the maximum permitted level of food code. The fraction of imported foodstuffs having meaningful radioactivity is small, however, the radioactive contamination survey of imported foodstuffs is still needed.
An ionization Chamber for a Steel Sheet Thickness Measurement
Kim, Han-Soo ; Park, Se-Hwa ; Kim, Yong-Kyun ; Ha, Jang-Ho ; Cho, Seung-Yeon ;
Journal of Radiation Protection and Research, volume 31, issue 3, 2006, Pages 149~153
An ionization chamber is still widely used in many fields by virtue of its' simple operational characteristics and the possibility of its' various shapes. A parallel type of an ionization chamber for a steel sheet thickness measurement was designed and fabricated. High pure xenon gas, which was pressurized up to 6 atm, was chosen as a filling gas to increase the current response and sensitivity for a radiation. A high pressure gas system was also constructed. The active volume and the incident window size of the fabricated ionization chamber were
, respectively. Preliminary tests with a 25 mCi
gamma-ray source and evaluation tests in a standard X-ray field were performed. The optimal operation voltage was set from the results of the collection efficiency calculation by using an experimental two-voltage method. Linearity for a variation of the steel sheet thickness, which is the most important factor for an application during a steel sheet thickness measurement, was 0.989 in this study.
Research on Measurement Condition Establishment of a Liquid Scintillation Counter System
Park, Eung-Seop ; Han, Sang-Jun ; Lee, Seung-Jin ; Kim, Hee-Gang ; Lee, Na-Young ; Mun, Ji-Yeon ;
Journal of Radiation Protection and Research, volume 31, issue 3, 2006, Pages 155~164
It is judged that there could be certainty in every process of analyzing environmental samples using Liquid Scintillation Counter. Therefore, this study focuses on quantitative evaluation on uncertainty in an effort to analyze comparatively accurately environmental samples. For this, after parameters which can have an effect on uncertainty was derived, the evaluation on each parameter was tamed out. The results of analysis of each parameter showed that the effect according to the weight difference of Teflon vial did not appear, and that standard deviations of SQP(E) averages reached saturation point at
sec at the result of making increases step by step the irradiation time of External standard, and that values measured by repeat method produces good results compared with replicate. Also, conclusion was derived that analysis on sample after it is left in cold and dark room at least above 1,000 minutes have to be carried out, and the result of carrying out verification on results measured as well as equipment itself using radioactivity-error-analysis and chi-square test, resonable result was derived.