JAEA-Conf 2011-002 - 日本原子力研究開発機構

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JAEA-Conf 2011-002 4. Conclusions References Ncul. Data Sheets J. Nucl. Sci. Technol. J. Nucl. Sci. Technol. Nucl. Data Sheets Phys. Rev. C Nucl. Phys. A
JAEA-Conf 2011-002 32. Effect of Newly-Measured Cross Sections of 157Gd on Burnup Characteristics of High Burnup BWR UO2 and MOX Assemblies Yoshihira ANDO 1,*, Toru YAMAMOTO 1 and Peng Hong LIEM 2 1 Reactor Core and Fuel Reliability Group, Safety Standard Division Japan Nuclear Energy Safety Organization (JNES) TOKYU REIT Toranomon Bldg. 7F, 3-17-1, Toranomon, Minato-ku, Tokyo 105-0001, Japan 2 Nippon Advanced Information Service Corporation Muramatsu 416, Tokai-mura Naga-gun Ibaraki-ken-1112, Japan * E-Mail:ando-yoshihira@jnes.go.jp Effect of newly-measured cross sections of 157Gd by Leinweber et al. (2006) on burnup characteristics of high burnup BWR UO2 and MOX assemblies was investigated by coupling burnup calculation using SRAC code with a modified JENDL-3.3 nuclear data library reflecting the above newly measured data. It was confirmed that meaningful differences on multiplication factors and fission distributions in the assemblies were observed mainly below 15GWd/t. 1 Introduction Leinweber et al.[1] have reported new measurement data on neutron capture, total cross sections and resonance parameters of Gd isotopes. One of the prominent results was that the thermal (2200m/s) capture cross section of 157Gd was 11% smaller compared with that in ENDF/B-VI.8[2]. Jatuffa et al.[3] have tested the newly-measured Gd isotope cross sections in the analysis of measured fission reaction rates of Gd2O3-UO2 rods (Gd rods) in tested BWR UO2 fuel assemblies in core physics experiments and reported that the new cross sections improved the discrepancy of the theoretically analyzed results from the measurements. During the evaluation study of JENDL-4 [4], the adoption of the new measurement data was assessed. For this purpose a preliminary cross section library for a continuous energy Monte Carlo calculation code MVP[5] was prepared to test the new data of 157Gd in the
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JAEA-Conf 2011-002 Proceedings of t
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JAEA-Conf 2011-002 31. Preliminary
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6.2 Measurement of neutron-induced
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JAEA-Conf 2011-002 Table 1 Comparis
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JAEA-Conf 2011-002 (T1/2=8,900,000
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JAEA-Conf 2011-002 Though words too
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JENDL-3.3 showed better applicabili
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ENDF. Thus this cross section store
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Acknowledgement JAEA-Conf 2011-002
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In the MALIBU program, isotope conc
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some minor actinides. For major act
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JAEA-Conf 2011-002 code MVP-BURN an
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JAEA-Conf 2011-002 [3] Measurements
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3.1 Experimental Set up JAEA-Conf 2
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References JAEA-Conf 2011-002 [1] N
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JAEA-Conf 2011-002 was large. The a
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JAEA-Conf 2011-002 4. Results and D
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Acknowledgments Present study inclu
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Fig. 1 A conceptural picture of the
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4. Theoretical studies Theoretical
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JAEA-Conf 2011-002 Fig.9 Comparison
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Ion source JAEA-Conf 2011-002 LE
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JAEA-Conf 2011-002 3. Readiness
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JAEA-Conf 2011-002
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JAEA-Conf 2011-002 Figure 1. An exa
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JAEA-Conf 2011-002 Figure 6. Compar
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JAEA-Conf 2011-002 calculation of d
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JAEA-Conf 2011-002 equilibrium emis
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JAEA-Conf 2011-002 Cowley et al. [1
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4. Conclusions We have compared nuc
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of MeV region with highest cosmic-r
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JAEA-Conf 2011-002 events can be id
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JAEA-Conf 2011-002 models and its p
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JAEA-Conf 2011-002
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JAEA-Conf 2011-002 xx
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JAEA-Conf 2011-002 1. The recent ac
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JAEA-Conf 2011-002 4. Conceptual de
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The Institute's staff of about 280
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3. Nuclear Theory Laboratory JAEA-C
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JAEA-Conf 2011-002 References [1] P
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JAEA-Conf 2011-002 reaction 6 Li +
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Using the approximated distribution
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momentum of the constituents of P.
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dσ/dΩ (mb/sr) c.m. scattering ang
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JAEA-Conf 2011-002 [2] N. Austern,
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moderating fast neutrons emitted fr
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JAEA-Conf 2011-002 3. Results and d
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JAEA-Conf 2011-002 the detection de
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Fig.1. Experimental arrangement for
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in this work was confirmed. (2) 153
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Neutron Capture Cross Section of 15
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ENDF resonance parameters are based
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sample changer. The measured flux s
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REFERENCES JAEA-Conf 2011-002 [1] W
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JAEA-Conf 2011-002 Fig. 4: The rela
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Fig. 10: The PHITS2 calculation geo
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for such a low energy region should
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MCNPX calculation was performed bas
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JAEA-Conf 2011-002 We measured dou
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1mm-thick carbon target 22mm in dia
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JAEA-Conf 2011-002 Figure 2 shows e
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Page 156 and 157: Acknowledgement We are grateful to
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Page 192 and 193: analysis of integral experiments [6
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Calculation was performed by the MV
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among these libraries, and the diff
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JAEA-Conf 2011-002 - 日本原子力研究開発機構

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