SHIELDING BENCHMARK TEST OF SODIUM AND IRON CROSS SECTIONS IN JENDL-3TJNDC Shielding Test Sub-WG, Japan Atomic Energy Research Institute Tokai-mura, Ibaraki-ken, Nakagun, 319-11 Japan 1) NAIG, 2) JAERI, 3) SRI, 4) SAEI, 5) MAPI, 6) MES, 7) MRI, 8) U. Tokyo The integral tests of sodium and iron cross sections in JENDL-3T have been performed by analyzing the following shielding benchmark experiments: 1) Broomstick experiment at ORNL, 2) the neutron transmission experiment of thick sodium cylinder and iron block at the ORNL TSF reactor, 3) ASPIS deep penetration experiment with iron slabs, 4) KFK leakage spectrum measurement from iron spheres, 5) KUR angle-dependent neutron spectrum measurement in iron sphere. The analyses are made by several neutron transport codes such as ANISN, DIAC, DOT-3.5 and MCNP, with more than 100 energy groups. Group constants are generated by the cross section processing systems, PROF-GROUCH-G2/B and RADHEAT-V4. In this study, it is confirmed that the iron and sodium data in JENDL-3T are applicable to the shielding analysis. Particularly, for the sodium experiments, JENDL-3T gives better results than JENDL-2 and ENDF/B-IV. However, the reevaluation for total and inelastic scattering cross sections of iron is necessary in the energy range from 0.8 to 3 MeV. KEYWORDS: integral test, shielding, neutron, transmission, sodium, iron, benchmark experiment, JENDL-3T, PROF-GROUCH-G2/B, RADHEAT-V4 |