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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 14, Issue 2 - Dec 1989
Volume 14, Issue 1 - Jun 1989
Selecting the target year
Optimization of Radiation Protection Using Markov Model
Chung, Jin-Yop ; Lee, Kun-Jai ;
Journal of Radiation Protection and Research, volume 14, issue 2, 1989, Pages 1~9
An analytic method for quantitative comparisions between the alternatives for radiation protection optimization is required to aid the decision making process. This paper introduces the dynamic Markov model to evaluate the effect of inservice inspection, testing, and repair activities of the plant on radiation protection. In the example to put the Markov model into practice, the steam generator inspection intervals which minimize expected cost and total exposure dose were determined using the data for Kori-2 unit and foreign plants. The results show that the effect of the radiation exposure on the steam generator inspection interval is determined by the cost rather than the radiation exposure. The Markov model used in the example can be applied easily to the domestic NPPs by replenishing the data and also can be used in evaluating the comparative priority between various alternatives for radiation protection optimization.
Component in Outdoor Natural Background Radiation
Jun, Jae-Shik ; Oh, Hi-Peel ; Chae, Ha-Suk ; Lee, Byung-Young ; Kim, Do-Sung ;
Journal of Radiation Protection and Research, volume 14, issue 2, 1989, Pages 10~17
A study for the assessment of dose given by outdoor radon to respiratory system has been carried out by making use of radon-cups containing CR-39 plastic track detectors. Detection efficiencies were determined by irradiation of the radon-cups in a standard radon chamber of known concentration. Thus determined detection factors of CR-39 plastic track detector in bare, open cup and filtered cup geometry are found to be 0.273, 0.0813 and 0.0371
), respectively, which are chemically etched in 30% NaOH solution of
for 220 minutes. The outdoor radon concentrations measured at Taejeon(Chungnam National University) from May 1988 to March 1989 are in the range of 27.4 - 135.8 Bq/
(0.74 - 3.67pCi/l)by open cup and 16.7 - 143.9 Bq/
(0.45 - 3.89 pCi/l) by filtered cup, which yield overall annual average value of outdoor radon concentration of
(1.91 pCi/l). Corresponding effective dose equivalent rate to respiratory system of ICRP standard man is assessed to be 520 nSv /h.
Calibration of CR-39 for Measurement of Radon in Air
Park, Y.W. ; Chang, S.Y. ; Ha, C.W. ; Ro, S.G. ;
Journal of Radiation Protection and Research, volume 14, issue 2, 1989, Pages 18~22
In order to calibrate the CR-39 Solid State Nuclear Track Detector (SSNTD), a closed -circulation type SSNTD-Calibration-System containing a radon-cup with the Millipore filter has been set-up, and the tracks produced on the SSNTD were measured for the known amount of radon concentration. Calibration factor for the time integrated radon concentration as a function of the track density on CR-39 was estimated to be
Measurement of Radon and its Daughters Concentration in Air
Park, Y.W. ; Ha, C.W. ; Ro, S.G. ;
Journal of Radiation Protection and Research, volume 14, issue 2, 1989, Pages 23~29
A Lucas cell was established and calibrated by using the double layer tube standard radon source. The calibration factors were 0.031
0.002 (pCi/l)/(cph/Cell) at room temperature, and 0.029
0.001 (pCi/l)/(cph/Cell) at
. Radon and its daughters concentrations were measured in a room air for the demonstrating purpose. The concentrations of 222 Rn,
were 0.87, 0.53, 0.35 and 0.26 pCi/l. The total eqilibrium factor was around 0.40 and the WL is
, resulting in 30 mrem/yr at this place.
Generation of Group Constant of Fission Product for Criticality Analysis of Spent Fuel
Shin, H.S. ; Choi, B.I ; Park, J.M. ; Ro, S.G. ;
Journal of Radiation Protection and Research, volume 14, issue 2, 1989, Pages 30~36
A FISSLIB, 51 group nuclear data set for 22 product nuclides, which are present in spent fuel and significantly affect the criticality of spent fuel, was generated from ENDF/B-IV using XLACS-II. The FISSLIB is ready to be used together with a data set generated from DLC-43/CSRL using AMPX system. The reliability of FISSLIB was verified by comparison with the data reported in BNL-325. Using FISSLIB, the criticality of KORI-1 spent fuel rod arranged infinitely was analyzed, and it was found that
of the spent fuel including fission products was lower by 9-14% than that calculated without fission products.
A Technique for Reactor Water Chemistry to Reduce Radioactivity Build up
Lee, Yong-Woo ; Kim, Hong-Tae ;
Journal of Radiation Protection and Research, volume 14, issue 2, 1989, Pages 37~44
An improved water chemistry technique was studied to reduce radioactivity build-up in reactor coolant system. The technique is convering the current coordinated lithium-boron chemistry regime to the elevated lithium chemistry regime in order to maintain high pH. Correlations between reactor coolant pH and radioactivity build-up were analized by using pH data from domestic PWRs. Consequently, it was founded that high pH chemistry was moer effective for radioactivity build-up reduction than current chemistry regime. This fact had revealed that much portion of reactor coolant corrosion products were nickel ferrite rather than magnetite, and that pH value ranging 7.0-7.4 was appropriate for high-pH chemistry operation.
Compositional Qualification of Radiation Protection in Neutron Radiotherapy Room with KCCH Cyclotron
Yoo, Seong-Yul ; Cho, Chul-Koo ; Koh, Kyoung-Hwan ;
Journal of Radiation Protection and Research, volume 14, issue 2, 1989, Pages 45~50
Radiation exposure of the personnel in the neutron therapy facility of KCCH cyclotron neutron system is discussed. In neutron therapy room, medical personnel is exposed to photons of the remanent induced radioactivity from the isocentric gantry in which targets and collimators are mounted. The radiation level of the neutron therapy room of KCCH cyclotron was acceptable and it decreased immediately after beam off. Personal exposure measured by individual monitor was far less than permissible level.
Neutron Dosimetry and Monitoring in the Radiation Environment
Nakamura, Takashi ;
Journal of Radiation Protection and Research, volume 14, issue 2, 1989, Pages 51~62
The high efficiency moderated-type neutron spectrometer and doseequivalent counter were developed for the measurement of low level environmental neutrons. By using these detectors, the neutron energy spectra and dose equivalent rates due to skyshine effect were measured in the environment surrounding the accelerator facilities and also the altitude variation of cosmic ray neutrons in the aircraft flying over Japan.