Production of Long-lived Radionuclides 10Be, 14C, 53Mn, 55Fe, 59Ni and 202gPb in a Fusion Environment

In a fusion reactor and also in future advanced reactor types, long-lived activation products may lead to significant long-term waste disposals and radiation damage. Many of these production cross sections are not well-known, making it difficult to calculate concentration limits. Some prominent long-lived activation products comprise Be-10, C-14, and Al-26; in the medium-mass range the radionuclides Mn-53, Fe-55,Fe-69, Ni-59,Ni-63; and for heavier isotopes Pb-202m, Bi-210m. Since a few years the technique of accelerator mass spectrometry (AMS) has been applied at the Vienna Environmental Research Accelerator (VERA) facility for the detection of long-lived radionuclides for such studies. In this respect, samples were irradiated with quasi-monoenergetic neutrons at TU Dresden's 14-MeV neutron generator and the van de Graaff accelerator at IRMM. After the activations the samples were prepared for isotope ratio measurements via ANIS. Production of long-lived Mn-53 and Ni-59 was measured via AMS utilizing the 14-MV tandem of the Maier-Leibnitz- laboratory, TU Munich. Radionuclides Be-10, C-14, Al-26, Fe-55, Bi-210m, and Pb-262g are measured at the VERA facility.