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- W4385388303 abstract "ABSTRACTA series of integral experiments was conducted to evaluate the fission and the capture cross-sections of transuranic (TRU) nuclides at the fast critical facility FCA of the Japan Atomic Energy Agency (JAEA). The experiments were carried out using seven uranium-fueled assemblies of the FCA. The neutron energy spectra of the core regions were adjusted so as to change from an intermediate neutron spectrum to a fast neutron spectrum on an assembly-by-assembly basis. The integral data measured with these experimental configurations provide some neutron energy characteristics: 1) fission rate ratios (FRRs) of 237Np, 238Pu, 242Pu, 241Am, 243Am, and 244Cm relative to 239Pu by using absolutely calibrated fission chambers, 2) small sample reactivity worths (SRWs) of 237Np, 238Pu, 240Pu, 241Am, and 243Am where oxide powders of around 15 to 20 grams were used, 3) criticalities, and 4) spectral indices such as fission rate ratios of 238U relative to 235U. In this paper, details of the SRW measurements are reported, and the latest Japanese Evaluated Nuclear Data Library JENDL-5 is tested by using the integral data obtained in systematically varied neutron energy spectra.KEYWORDS: FCAintegral experimentTRU oxide samplesample reactivity worthJENDL-5 AcknowledgmentsThe authors would like to express their gratitude the ORNL for providing the TRU samples and the chemical analysis, and Mr. T. Andes at the Y-12 for recently providing us with the detailed chemical analysis data of the highly enriched uranium plates of the FCA. The gratitude is also extended to Dr. K. Tsujimoto and Dr. K. Nishihara of JAEA for their encouragement and comments. Finally, the authors are grateful to all members of the staff at the FCA.Disclosure statementNo potential conflict of interest was reported by the author(s)." @default.
- W4385388303 created "2023-07-30" @default.
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- W4385388303 date "2023-08-22" @default.
- W4385388303 modified "2023-09-27" @default.
- W4385388303 title "TRU oxide sample reactivity worths measured in the FCA-IX assemblies with systematically changed neutron energy spectra" @default.
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- W4385388303 doi "https://doi.org/10.1080/00223131.2023.2240872" @default.
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