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화학당량에 따른 우라니아의 핵분열 기체 확산 계수 측정
김희문(H. Kim),박광헌(K. Park),김봉구(B. G. Kim),주용선(Y. S. Choo),김건식(K. S. Kim),송근우(K.W. Song),홍권표(K. P. Hong),강영환(Y. H. Kang) 한국표면공학회 2002 한국표면공학회지 Vol.36 No.1
The diffusion coefficient of Xe-133 was obtained from an annealing test. The specimens were made from a UO₂ single crystal powder with natural enrichment. Weight and grain size were 300mg and 23(㎛, respectively. Oxygen potentials were obtained from an oxygen sensor. Released fractions were obtained from both results of gamma scans and quantitative analysis with MCNP code, The annealing test was performed at three temperatures at once. Diffusion coefficients of Xe-133 were calculated using slope of Booth theory in each O/M ratios. Activation energy and the pre-exponential factor of the diffusion coefficient were obtained. The activation energy of near stoichiomeric UO₂ is 310 kJ/mol. The measured values of near stoichiometric UO₂ are very close to other data available. Diffusion coefficients increase with hyper-stoichiometry, due to higher concentration of cation vacancies.
홍권표,유길성,민덕기,구대서,신희성 韓國非破壞檢査學會 1999 한국비파괴검사학회지 Vol.19 No.2
영상처리 방법에 의한 핵연료봉의 제원을 측정하기 위하여 영상처리 소프트웨어를 개발하고 핵연료봉의 직경을 측정하였다. 카메라와 시험체간의 거리, 카메라 위치, 조명세기 및 조명종류와 같은 요소가 핵연료봉 제원 측정에 영향을 미침을 확인하였다. 영상처리 방법에 의한 핵연료봉 직경의 백분율 측정 상대오차는 4.88%이고 백분율 측정 표준편차는 ±3.34%였다. 한편 영상처리 방법이 아닌 기존 방법에 의한 백분율 측정 상대오차는 12.77%이고 백분율 측정 표준편차는 ±9.72%였으며, 영상처리 방법에 의한 직경 측정 정확도가 기존 방법에 의한 결과보다 약 3배 정도 향상되었다. An image processing technology was developed to measure the dimension of nuclear fuel rods and the diameter of nuclear fuel rods was measured by this method. It was confirmed that parameters such as camera-to-specimen distance, camera location, light intensity and light characteristic would affect dimension measurement of nuclear fuel rods. The percent relative error and percent standard deviation of measuring the diameter of nuclear fuel rods using image processing method were 4.88%, ±3.34% while the percent relative error and percent standard deviation using conventional method were 12.7%, ±9.72%, respectively. The accuracy of diameter measurement of nuclear fuel rods using image processing method was about 3 times as high as that using conventional method.