Validation Analyses of IEAF-2001 Activation Cross-Section Data for SS-316 and F82H Steels Irradiated in a White d-Li Neutron Field

Abstract

The evaluated intermediate-energy activation cross-section library IEAF-2001 has been tested against integral experiments with SS-316 and F82H steels exposed to a white neutron flux spectrum extending up to 55 MeV. By making use of the ALARA inventory code the expected γ-active product nuclide inventories were calculated and compared with the measured one. It was found that IEAF-2001 reasonably agrees with experimental data for most of the detected radioisotopes. The reasons for some larger disagreements were found to be the uncertainty of the sample elemental composition, non-validated neutron activation reaction cross sections, and sequential charge particle reactions.

Use of Integral Data to Improve the European Activation File

“…The nuclides responsible for most of the activity can be identified and by comparing the calculated (C) value with the measured value (E), the C/E ratio for a set of nuclides can be found. Examples of analyses that follow this approach are those of Sublet [3] for a large set of Japanese measurements analyzed with EAF-2003 and Simakov et al [4] who analyzed FZK measurements at neutron energies > 20 MeV with IEAF-2001.…”

“…In EAF-2004 no change was made to the data for charged particle reactions used for calculation of sequential charged particle reaction products (SCPR) [9]. The analysis presented in [4] used the charged particle data below 20 MeV and the results suggested that the contribution of SCPR for neutrons with energies > 20 MeV may be enhanced. Consequently current work on EAF-2005 is underway to extend the charged particle data so that this contribution can be included when analyzing integral data.…”

Overview of recent progress in IFMIF neutronics

“…IEAF-2001 activation cross-section data were tested against results of an integral activation experiment performed previously at FZK [19]. Samples of SS-316 and F82H steels, V and V-4Ti-4Cr alloy were activated in an IFMIF-like neutron field produced by a 40-MeV deuteron beam on a thick lithium target [20].…”

Nuclear Data for Fusion Energy Technologies: Requests, Status and Development Needs

“…The evaluation effort on general-purpose neutron cross-section data focused in the frame of the IFMIF project on selected important nuclides such as 1 H, 56 Fe, 23 Na, 39 K, 28 Si, 12 C, 52 Cr, and 51 V up to 50 MeV neutron incidence energy and, more recently, 6,7 Li and 9 Be up to 150 MeV [22]. Cross-section data for other nuclides such as 16 O, 14 N, 27 Al, [28][29][30] Si, 31 P, 40 Ca, 50,52-54 Cr, 54,56-58 Fe, 58,60,-,62,64 Ni, 63,65 Cu, 93 Nb, and 182-184,186 W are available from the LANL 150-MeV evaluations [23] and are included in release 6 of the ENDF/B-VI nuclear data library.…”

“…More recently, new NRG evaluations up to 200 MeV became available for 40,[42][43][44]46,48 Ca, 45 Sc, [46][47][48][49][50] Ti, 54,56-,58 Fe, 70,[72][73][74]76 Ge, 204,[206][207][208] Pb, and 209 Bi [24]. JAERI has released as well JENDL High Energy data (up to 3 GeV) for 1 H, 12,13 C, 14 N, 16 O, [24][25][26] Mg, 27 Al, [28][29][30] Si, 39,41 K, 40,[42][43][44][45][46]48 Ca, [46][47][48][49][50] Ti, 51 V, 50,52-54 Cr, 55 Mn, 54,56-58 Fe, 59 Co, 58,[60][61][62]64 Ni, 63,65 Cu,…”