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조호동 ( Ho Dong Jo ),노재훈 ( Jae Hoon Roh ),김치년 ( Chi Nyon Kim ),심상효 ( Sang Hyo Sim ),원종욱 ( Jong Uk Won ) 한국산업위생학회 2010 한국산업보건학회지 Vol.20 No.3
This study aimed to suggest the severity of indoor air pollutants in screen gold arenas which were not sufficiently investigated in Korea up to now and to help users to enjoy golf in more pleasant indoor environment. The indoor environment survey was conducted with 21 screen gold arenas in Seoul from Oct. 28, 2008 to March 13, 2009. Indoor air quality was measured and analyzed in accordance with the Air Pollution Process Test Method specified bu NIOSH(2005). The screen golf arenas are mostly in the underground floors in this study, 4 on the ground floors(19.0%) and 17 in the underground floors(81.0%). In the air in screen golf arenas, the geometric mean of benzene, toluene, ethylbenzene and xylene were 2.92 ㎍/㎥, 70.34 ㎍/㎥, 14.00㎍/㎥ and 31.43 ㎍/㎥, respectively, which exceeded the exposure limites. Each arena exceeded the exposure limit for one pollutant each. However, styrene didn`t exceed the limit as 8.09 ㎍/㎥. Furthermore, the geometric mean of formaldehyde was 63.11㎍/㎥and 7 arenas exceeded the limit. The geometric mean of volatile organic compounds(VOCs) was 428.41㎍/㎥ and 10 arenas exceeded the limit. For the density distribution of pollutants by location, benzene, toluene, ethylbenzene, xylene, styrene and formaldehyde showed higher density distribution in underground spaces, for which the statistically significant difference was not found. However, PM10 showed the statistically significant difference (p<0.05). In accordance with the analysis on the correlation between the density of pollutants in the screen golf arenas, Pearson correlation coefficient between ethylbenzene and styrene was 0.980, very significant correlation(p<0.01). The correlation coefficients between the density of toluene, ethylbenzene, xylene and styrene and that of VOCs were 0.543, 0.434, 0.451 and 0.459, respectively, which demonstrated the statistically significant difference (p<0.05).
사용후 핵연료 처리공정물질의 핵물질 비파괴분석을 위한 중성자 증배 보정인자에 관한 연구
김현조,박재우,고원일,김호동 제주대학교 방사능이용연구소 2002 연구보고 Vol.16 No.-
The quantity of uranium or plutonium present in bulk samples of metal, oxide, mixed-oxide, fuel rods, etc., can often be assayed nondestructively by means of neutron coincidence counting. The self-multiplication phenomenon, which results from the induced fissions existing within the sample, inevitably generates measurement error. In this study, neutron multiplication effects were investigated by the measurement method proposed by Ensslin, and then the correction curves of neutron multiplication were derived. For this, DSNC(DUPIC Safeguards Neutron Counter), a well-type neutron coincidence counter, was use. In addition, the neutron multiplication effects were verified by comparison with the result of MCNP code. The correction curve obtained from this study will be used to increase measurement accuracy of the well-type neutron accounting sysyem in the future.