학술논문
Activation inventories after exposure to dd/dt neutrons in safety analysis of nuclear fusion installations
Document Type
Author
Stankunas, Gediminas; Bergsåker, Henric; Bykov, Igor; Frassinetti, Lorenzo; Garcia-Carrasco, Alvaro; Hellsten, Torbjörn; Johnson, Thomas; Menmuir, Sheena; Petersson, Per; Rachlew, Elisabeth, 1944; Ratynskaia, Svetlana; Rubel, Marek; Stefanikova, Estera; Ström, Petter; Tholerus, Emmi; Tolias, Panagiotis; Olivares, Pablo Vallejos; Weckmann, Armin; Zhou, Yushun; Zychor, I.; et al.
Source
Radiation Protection Dosimetry. 180(1-4):125-128
Subject
Language
English
ISSN
0144-8420
1742-3406
1742-3406
Abstract
Irradiations with 14 MeV fusion neutrons are planned at Joint European Torus (JET) in DT operations with the objective to validate the calculation of the activation of structural materials in functional materials expected in ITER and fusion plants. This study describes the activation and dose rate calculations performed for materials irradiated throughout the DT plasma operation during which the samples of real fusion materials are exposed to 14 MeV neutrons inside the JET vacuum vessel. Preparatory activities are in progress during the current DD operations with dosimetry foils to measure the local neutron fluence and spectrum at the sample irradiation position. The materials included those used in the manufacturing of the main in-vessel components, such as ITER-grade W, Be, CuCrZr, 316 L(N) and the functional materials used in diagnostics and heating systems. The neutron-induced activities and dose rates at shutdown were calculated by the FISPACT code, using the neutron fluxes and spectra that were provided by the preceding MCNP neutron transport calculations.