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Securing the advanced reactor fleet
Physical protection accounts for a significant portion of a nuclear power plant’s operational costs. As the U.S. moves toward smaller and safer advanced reactors, similar protection strategies could prove cost prohibitive. For tomorrow’s small modular reactors and microreactors, security costs must remain appropriate to the size of the reactor for economical operation.
C. Tsabaris, E. Wattecamps, G. Rollin, C. Papadopoulos
Nuclear Science and Engineering | Volume 128 | Number 1 | January 1998 | Pages 47-60
Technical Paper | doi.org/10.13182/NSE128-47
Articles are hosted by Taylor and Francis Online.
Double-differential (n,xp) and (n,x) cross-section ratio measurements are performed at the 7-MV Van de Graaff accelerator laboratory for neutron energies between 2.0 and 15.6 MeV. The following reaction rate ratios are measured: 58Ni(n,x) to 27Al(n,), 58Ni(n,x) to 58Ni(n,p), 63Cu(n,xp) to 27Al(n,), and 63Cu(n,xp) to 58Ni(n,p). Protons or alphas are detected by E-E-E telescopes under 14, 51, 79, 109, and 141 deg. The energy spectrum of the emitted particles and the angular yield distribution are measured. First, the measurements provide double-differential cross-section data for 27Al(n,) and 58Ni(n,p) by normalization to the known total yield reference cross-section values. Subsequently, the reaction rate ratios of 58Ni(n,x) and 63Cu(n,xp) to 27Al(n,) or 58Ni(n,p) provide double-differential cross sections of 58Ni(n,x) and 63Cu(n,xp) in b/(MeVsr). The measured double-differential cross-section data, the particle energy spectra, the angular distributions, and the total yield cross-section data are compared with measured data from literature and with nuclear reaction model calculations performed at the Institute for Reference Materials and Measurements with the computer codes STAPRE-H and EXIFON.