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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 29, Issue 4 - Dec 2004
Volume 29, Issue 3 - Sep 2004
Volume 29, Issue 2 - Jun 2004
Volume 29, Issue 1 - Mar 2004
Selecting the target year
Source term estimation using least squares method in a radiological emergency
Jeong, Hyo-Joon ; Kim, Eun-Han ; Suh, Kyung-Suk ; Hwang, Won-Tae ; Han, Moon-Hee ;
Journal of Radiation Protection and Research, volume 29, issue 3, 2004, Pages 157~163
Atmospheric dispersion modelling has been widely used to predict the fate and transport of radioactive or toxic materials released from nuclear facilities which is an unlikely accidental event. To improve the forecasting performance of the dispersion model, it is required that source rate and dispersion characteristics must be defined appropriately. Generally, source term of the radioactive materials is much uncertain at the early phase of an accidental event. In this study, we computed the source rate with the experimental field data monitored at the Yeoung-Kwang nuclear site and obtained the optimal source rate to minimize the errors between the measured concentrations and the computed ones by the Gaussian plume model. Computed source term showed a good result within 24% of the artificially released source rate.
An Experimental Study on the Direct Contamination Pathway of Elemental iodine Vapor
for Rice Plants
Choi, Y.H. ; Lim, K.M. ; Lee, C.M. ; Park, H.G. ; Park, D.W. ; Choi, G.S. ; Choi, H.J. ; Lee, H.S. ; Lee, C.W. ;
Journal of Radiation Protection and Research, volume 29, issue 3, 2004, Pages 165~172
Rice plants were exposed to
vapor for 80 min at different growth stages in an exposure box to investigate the parameters concerning direct plant contamination. Deposition velocity
vapor for the straws was in the range of
depending on the exposure time, being comparatively low during the earlier part of the plant growth. Ear deposition velocity was in the range of
. Whole-plant deposition velocity was in the range of
with the highest from the exposure performed on Aug. 18 (7 d after the start of heading). The time-dependent variation generally decreased when the deposition velocity was normalized to the biomass density No noteworthy tendency in the deposition velocity was observed with regard to the temperature, sunlight and humidity. Translocation factor for the hulled seeds was
with the highest from the Aug. 23 exposure. It was found that a leaf deposition even before the ear emergence resulted in a considerable seed translocation.
Iodine Deposition onto the Chinese Cabbage
Lee, Han-Soo ; Choi, Heui-Joo ; Kang, Hee-Suk ; Yu, Dong-Han ; Keum, Dong-Kwon ; Lim, Kwang-Mook ; Park, Hyo-Kook ; Choi, Yong-Ho ; Lee, Chang-Woo ;
Journal of Radiation Protection and Research, volume 29, issue 3, 2004, Pages 173~177
The Chinese cabbage, being one of the principal foodstuffs in Asian countries, is tested for iodine exposure. As a radioactive source, iodine-125 of which the radiological half life is 60 days was used to measure the concentration change. Experiments were carried out four times with different times of exposure. The iodine source was prepared by the chemical reaction of NaI in order to avoid producing relatively large iodine which might be generated In the case of crystal evaporation. The deposition velocity was obtained from the integrated air concentration and surface concentration of the Chinese cabbage. The environmental half life was also calculated.
Design of a TL Personal Dosimeter Identifiable PA Exposure and Development of Its Dose Evaluation Algorithm
Kwon, J.W. ; Kim, H.K. ; Yang, J.S. ; Kim, J.L. ; Lee, J.K. ;
Journal of Radiation Protection and Research, volume 29, issue 3, 2004, Pages 179~186
A single-dosimeter worn on the anterior surface of body of a worker was found to provide significant underestimation of dose to the worker when radiation comes from behind of the human body. Recently, several researchers suggested that this kind of underestimation can be corrected to a certain extent by using an extra dosimeter on the back. But this multiple dosimetry also has the disadvantages like overestimation lowering work efficiency or cost burden. In this study, a single dosimeter introducing asymmetric filters enabled to identify PA exposure was designed by monte-carlo simulation and experiments and its dose evaluation algorithm for AP-PA mixed radiation field was established. This algorithm was applicable to penetrating radiation which had the effective energy more than 100 keV. Besides, the dosimeter and algorithm in this study were possible to be applied to near PA exposure.
A Comparison Study on Severe Accident Risks Between PWR and PHWR Plants
Jeong, Jong-Tae ; Kim, Tae-Woon ; Ha, Jae-Joo ;
Journal of Radiation Protection and Research, volume 29, issue 3, 2004, Pages 187~196
The health effects resulting from severe accidents of typical 1,000MWe KSNP(Korea Standard Nuclear Plant) PWR and typical 600MWe CANDU(CANada Deuterium Uranium) plants were estimated and compared. The population distribution of the site extending to 80km for both site were considered. The releaese fraction for various source term categories(STC) and core inventories were used in the estimation of the health effects risks by using the MACCS2(MELCOR Accident Consequence Code System2) code. Individuals are assumed to evacuate beyond 16km from the site. The health effects considered in this comparative study are early and cancer fatality risk, and the results are presented as CCDF(Complementary Cumulative Distribution Function) curves considering the occurrence probability of each STC's. According to the results, the early and cancer fatality risks of PHWR plants we lower than those of PWR plants. This is attributed the fact that the amount of radioactive mateials that released to the atmosphere resulting from the postulated severe accidents of PHWR plants are smaller than that of PWR plants. And, the dominating initiating event of STC that shows maximum early and cancer fatality risk is SGTR(Steam Generator Tube Rupture) for both plants. Therefore, the appropriated actions must be taken to reduce the occurrence probability and the amounts of radioactive materials released to the environment in order to protect the public for both PWR and PHWR plants.
Vertical distirbution of
activities in the soils of Korea
Cha, H.J. ; Park, D. ; Park, H. ; Kang, M.J. ; Lee, W. ; Choi, G.S. ; Cho, Y.H. ; Chung, K.H. ; Lee, H.P. ; Shin, H.S. ; Lee, C.W. ;
Journal of Radiation Protection and Research, volume 29, issue 3, 2004, Pages 197~204
Vertical distributions of
activities are studied for the soils of six areas, Korea (Gori, Yeonggwang, Uljin, Weolseong, Goseong and Jeju). The soils from 6 areas are at geographically different locations with the different environmental conditions and parent rook. The activities of
vary N.D.(below detection limit) to 185 Bq/kg and 2.79 - 8.06 Bq/kg, respectively. Activities of
show the highest value at the surface soil and decrease with depth.
activities at the top surface soils are positively correlated with annual precipitation and organic carbon content with little relationship with mean grain size and the clay content. The highest
activities are found at the Jeju site, followed by the Goseong site of which soils have much different parent rock and textural properties. Though the activities of
on the basis of dry weight are higher in Jeju soils than in Goseong soils, their inventories are similar in both soils due to their textural differences.
Numerical Simulation for the Field Tracer Experiment over the Kori Nuclear Power Plant
Suh, Kyung-Suk ; Kim, Eun-Han ; Whang, Won-Tae ; Jeong, Hyo-Joon ; Han, Moon-Hee ;
Journal of Radiation Protection and Research, volume 29, issue 3, 2004, Pages 205~212
Three-dimensional wind field and atmospheric dispersion models have been developed for estimating the concentration distributions of radioactive materials released into atmosphere. The field tracer experiment near the Kori nuclear power plant located over complex terrain was carried out for validating the atmospheric dispersion model. The wind fields were one of the most important factors for calculating the concentration. Therefore several numerical simulations using the measured wind data were performed to get more accurate concentration distributions compared with the analyzed values of the tracer gas. The calculated concentration distributions agreed well in the case of the usage of the more measured wind data in wind field model.