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오근석,양재춘 충남대학교 1990 忠南科學硏究誌 Vol.17 No.1
We have investigated the nuclear fuel state analysis from the physical characteristics of unclear fission products in the reactor core which are produced by reaction between neutron and U^235. We set up H which is the ratio of the number of defective fuel rod to the mass of tramp uranium and calculate the contributed rate of radioactivities of iodine isotopes in primary coolant. We have measured the radioactivities of fission products in the primary coolant of nuclear power reactor and utilized the ratios of radioactivities of I^131 to I^133 and I^135 to I^133 in order to calculate the number of defective fuel rod and the mass of tramp uranium. The ratio of the number of defective fuel rod to the mass of tramp uranium is more sensitive to variation of the number of defective fuel rod than to variation of the mass of tramp uranium. The model which is considered by the radioactivities of fission products released from the defective nuclear fuel and from the tramp uranium in the primary coolant is confirmed appropriateness.