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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 10, Issue 2 - Dec 1985
Volume 10, Issue 1 - Jun 1985
Selecting the target year
Derivation of a Monte Carlo Estimator for Dose Equivalent
Lee, Jai-Ki ;
Journal of Radiation Protection and Research, volume 10, issue 2, 1985, Pages 89~95
An alternative estimator for dose equivalent was derived. The original LET distribution concept was transformed into a charged particle fluence spectrum concept along with the definition of an average quality factor named slowing-down averaged quality factor by adopting the continuous slowing down approximation. With the alternative estimator, the dose equivalent delivered into a receptor located in a given radiation field can be directly and conveniently estimated in a Monte Carlo procedure. The slowing-down averaged quality factors for the energy range below 10 MeV were evaluated and tabulated for the charged particles which may be generated from the interactions of neutron with the nuclei composing soft tissue.
Assessment of Natural Radiation Exposure by Means of Gamma-Ray Spectrometry and Thermoluminescence Dosimetry
Jun, Jae-Shik ; Oh, Hi-Peel ; Choi, Chul-Kyu ; Oh, Heon-Jin ; Ha, Chung-Woo ;
Journal of Radiation Protection and Research, volume 10, issue 2, 1985, Pages 96~108
A study for the assessment of natural environmental radiation exposure at a flat and open field of about
in area in CNU Daeduk campus has been carried out by means of gamma-ray scintillation spectrometry and thermoluminescence dosimetry for one year period of time from October 1984. The detectors used were 3'
3' NaI(T1) and two different types of LiF TLD, namely, chip sealed in plastic sheet which tightly pressed on two open holes of a metal plate and Teflon disk. Three 24-hour cycles of in-situ spectrometry, and two 3-month and one 1-month cycles of field TL dosimetry were performed. All the spectra measured were converted into exposure rate by means of G(E) opertaion, and therefrom exposure rate due to terrestrial component of environmental radiation was figured out. Exposure rate determined by the spectrometry was, on average,
, and the rates of
were obtained from chip and disk TLD, respectively. Fluctuations in diurnal variation of the exposure rate measured by the spectrometry were noticeable sometime even in a single cycle of 24 hours. It is concluded that appropriately combined use of TLD with iu-sitn gamma-ray spectrometry system can give more accurate and precise measure of environmental radiation exposure, and further study for more adequate and sensitive TLD for environmental dosimetry, including improvement and elevation of accuracy in data assessment through inter-laboratory or international intercomparison is necessary.
Tissue Distribution and Binding Proteins of Radionuclides in Bivalve, Gomphina melanaegis
Yoo, Byung-Sun ; Chung, Hai-Won ; Lee, Jeong-Ho ;
Journal of Radiation Protection and Research, volume 10, issue 2, 1985, Pages 109~112
Radioisotope tracer experiments on the distribution and the binding of radionuclides to proteins in bivalve were carried out in order to gain further information on biochemical behavior of radionuclides in marine bivalve, Gomphina melanaegis. The radioactivities (cpm/g) of
after 7 days exposure were highly concentrated in liver and kidney in comparison to soft parts. The gel filtration profile of
in liver and kidney showed three elution peaks, while
showed two peaks in liver and three peaks in kidney. On the gel filtration of
in liver and kidney, most of
were eluted on one peak. Thus, it was considered that each radionuclide was bound to different proteins in liver and kidney of bivalve.
Study on Leaching Characteristics of
from Cement-Solidified Radwastes
Hwang, Sun-Tae ; Lee, Kyung-Ju ; Choi, Kil-Oung ; Park, Hun-Whee ; Kim, Hwan-Young ;
Journal of Radiation Protection and Research, volume 10, issue 2, 1985, Pages 113~121
For the safety assessment of radwaste treatment and disposal, the leaching characteristics of
from the cement-solidified radwastes was investigated by means of the survey and analysis of the activity leach rate and cumulative leach fraction of
leaching from solidified radwastes. The cylindrical cement-solidified samples were made by the sodium silicate method and neutralization method changing the mole density of simulated liquid radwaste, type of cement, adding material and concentration of boric acid. The leaching study was carried out by the method using simulated PWR concentrated liquid radwaste solidified in cement that had been processed following the recommendations of IAEA. All the experimental results are in well accordance with the research data reported previously, but the watertight cement-solidified radwastes show rather high leach rate of radioactivity. It is learned, therefore, that the watertight cement is not adequate as the material for the solidified radwastes.
Drug Toxicities of S-2-(W-aminoalkylamino) ethyl and S-2, W-diaminoalkyl Isothiuronium Bromides and their Potent Radioprotective Effects
Kim, You-Sun ; Kim, Suc-Won ;
Journal of Radiation Protection and Research, volume 10, issue 2, 1985, Pages 122~129
S-2, W-diaminopentyl isothiuronium bromide and relevant thiophosphate derivative were prepared starting from both phthalimide and l-ornithinic acid. Drug toxicities of the prepared isothiuronium bromide and S-2-(W-aminoalkylamino) ethyl isothiuronium bromides were tested through ICR male mice, 4 and 8 weeks old and weighing
. The former compound was found to be less toxic than those of latter compounds. This difference of drug toxicities seemed to be originated from their chemical structures, which were examined through IR Spectrometry Radioprotective effects of these compounds were discussed through relevant research data and diaminopentyl derivatives are considered to be a potent radioprotectant with low drug toxicity.
International Comparison of Absolute Activity Measurement of
Park, Tae-Soon ; Oh, Pil-Jae ; Hwang, Sun-Tae ;
Journal of Radiation Protection and Research, volume 10, issue 2, 1985, Pages 130~136
The activity measurement of a solution of
which is an electron capture nuclide was carried out by the
coincidence method. The counting rates at the
, and coincidence-channels were measured using a
proportional counter and two NaI(Tl) scintillation detectors. The specific activity of the solution calculated by the efficiency extrapolation was
at the reference time(00h UT, 03-15-84). According to an international comparison of activity measurements organized by the Bureau International des Poids et Mesures, this result showed the difference of 0.94% to the mean value derived from the comparison.
Effects of Radiation on the Chromosomes in Bone Marrow Cells of the Mouse
Kim, Yung-Jin ; Kim, Jong-Bong ;
Journal of Radiation Protection and Research, volume 10, issue 2, 1985, Pages 137~143
To study the relationships among the frequency of chromosomal aberration induced by radiation, mouse age at the time of exposure and elapsed time after the irradiation, the 40, 150 and 300 day old mice were irradiated by gamma rays to 200 rad of acute whole body doses. The bone marrow chromosomes were observed in 8 experimental groups such as 1, 2, 3, 4, 8, 16, 30, 60 and 90 days after irradiation. In the 40 day old mice the frequencies of cell with chromosomal aberration were 53.0%, 21.5%, 8.4%, 8.4%, 12.0%, 8.0%, 7.0% and 5.0% in 8 experimental groups, in the 150 day old mice 32.5%, 12.1%, 10.5%, 12.8%, 0.03%, 9.7%, 7.0% and 4.2%. The 300 day old mice showed that the frequencies of cells with chromosomal aberration were 27.7%, 13.6%, 9.0%, 9.3%, 13.3%, 14.4%, 7.5% and 9.5% in each experimental group. There were tendencies that the frequencies of cell with chromosomal aberration were higher in the young mice than the old ones within 2 days after the irradiation but in the old mice than the young ones after 4 days.
Determination of the Spontaneous Fission Rate of
Using Solid State Track Recorder
Ro, Seung-Gy ; Yook, Chong-Chul ; Koh, Byung-Ryung ;
Journal of Radiation Protection and Research, volume 10, issue 2, 1985, Pages 144~147
The spontaneous fission rate of
has been determined using a solid state track recorder that was a pre-etched mica. Counting the tracks revealed in mica made it possible to calculate the spontaneous fission rate. The mica remained in close contact with a
foil for about five years. The resulting fission rate was
Radiation Shield Analysis for Spent Fuel Shipping Cask
Cho, Kun-Woo ; Kim, Hee-Won ; Kwon, Seog-Kun ; Kwak, Eun-Ho ; Moon, Philip-S. ;
Journal of Radiation Protection and Research, volume 10, issue 2, 1985, Pages 148~154
Radiation shield design for a shipping cask, KSC-1, was evaluated to verify that the cask can be used in the transportation of a spent fuel assembly discharged from KNU 5 & 6. Radiation source term of the spent fuel assembly was calculated with the computer program ORIGEN-79, QAD-CG, ANISN-KA and DOT 3.5 codes Were used in the shielding calculations and the nuclear cross section data needed was extracted from the DLC-23/CASK library. It is concluded that KSC-1 shipping cask satisfies the requirements specified in the relevant regulations under normal conditions of transport and under accident conditions in transport.
Calculation of Absorbed Dose for Immersion in Semi-Infinite Radioactive Cloud...(1)
Lee, Soo-Yong ;
Journal of Radiation Protection and Research, volume 10, issue 2, 1985, Pages 155~159
In general, dose rates for a monoenergetic gamma emitter uniformly distributed in an infinite cloud have been calulated by using the monoenergetic point-isotorpic source kernel technique. The most serious limitation on use of the kernel technique is subjected to the fact that it estimates the dose only at the surface of body. As a result, an alternative method is presented in which estimates of dose rate for immersion in a radioactive cloud are resulted from the scattered photon spectra incident on the surface of body. The results are in excellent agreement with other's. Work is currently in progress to apply these results to immersion dose problems associated with absorbed dose distribution in the MIRD phatom.