JAERI 1287 JNDC Nuclear Data Library of Fission Products Fir

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mm PIT S mm -I? ia^ ^?& (m&m Takumi Asaoka Masashi Iizumi Takuji Komori Takao Numakunai Kazuo Sato Naomoto Shikazono Yasuo Suzuki Takehiko Yasuno JAERI v (T319-II an tt , 0 Mi ft (mm m. Till M- ffllEH WS £Z (l#l^g|!) Japan Atomic Energy Research Institute Board of Editors Shigeru Mori (Chief Editor) Muneo Handa Michio Ishikawa Mitsuru Mizuho Hiroshi Okashita Masayuki Sato Junichi Shimokawa Masatoshi Tanaka Mitsuo Yokota tl W^ Motoyoshi Hatada Akihiko Ito Yoshio Murao Konomo Sanokawa Eiji Shikata Nobutake Suzuki Hirokazu Umezawa Kenzo Yoshida JAERI reports are reviewed by the Board of Editors and issued irregularly. Inquiries about availability of the reports should be addressed to Information Section, Division of Technical Information, Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken 319-11, Japan. ©Japan Atomic Energy Research Institute, 1983 0 * JI ffl % F/f
JAERI 1287 JNDC Nuclear Data Library of Fission Products Kanji Tasaka, Hitoshi Ihara, Masatsugu Akiyama' Tadashi Yoshida *, Zyun-itiro Matumoto and Ryuzo Nakasima Japanese Nuclear Data Committee Tokai Research Establishment Japan Atomic Energy Research Institute Tokai-mura, Naka-gun, Ibaraki-ken Received June 3, 1983 Abstract The JNDC (Japanese Nuclear Data Committee) FP (Fission Product) nuclear data library for 1172 fission products is described in this report. The gross theory of beta decay has been used extensively for estimating unknown decay data and also some of known decay data with poor accuracy. The calculated decay powers of fission products using the present library show excellent agreement with the latest measurements at ORNL (Oak Ridge National Laboratory), LANL (Los Alamos National Laboratory) and UTT (University of Tokyo, Tokai) for cooling times shorter than 10 3 s after irradiation. The calculated decay powers by the existing libraries showed systematic deviations at short cooling times; the calculated beta and gamma decay powers after burst fission were smaller than the experimental results for cooling times shorter than 10 s, and in the cooling time range 10 to 10 3 s the beta-decay power was larger than the measured values and the gamma decay power smaller than the measured results. The present JNDC FP nuclear data library resolved these discrepancies in the short cooling time ranges. The decay power of fission products has been calculated for ten fission types and the results have been fitted by an analytical function with 31 exponentials. This permits the easy application of the present results of decay power calculations to a LOCA (Loss-of-Coolant Accident) analysis of a light water reactor and so on. Keywords: Fission Product, Decay Data, Fission Yield Data, Neutron Capture Cross Section Data, Gross Theory, Data Library, Fission Energy, Decay Heat, Evaluation, Fitting Equation The work was performed in the evaluation work of the Working Group on Evaluation of Decay Heat, Japanese Nuclear Data Committee. * Nuclear Engineering Research Laboratory, Faculty of Engineering, University of Tokyo ** NAIG Nuclear Research Laboratory, Nippon Atomic Industry Group Co., Ltd. *** Department of Physics, Hosei University
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JAERI 1287 2. Nuclear Data Library
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JAERI1287 133 3. Comparison of Calc
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JAERI 1287 3. Comparison of Calcula
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JAERI 1287 151 4. Calculation of De
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JAERI 1287 4. Calculation of Decay
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JAERI 1287 217 Acknowledgment The a
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