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Long Term Neutron Activation in JET DD Operation
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- Zohar, Andrej (författare)
- Jozef Stefan Inst, Reactor Phys Dept, Jamova Cesta 39, Ljubljana 1000, Slovenia.;Univ Ljubljana, Fac Math & Phys, Jamova Cesta 19, Ljubljana 1000, Slovenia.
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- Lengar, Igor (författare)
- Jozef Stefan Inst, Reactor Phys Dept, Jamova Cesta 39, Ljubljana 1000, Slovenia.
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- Batistoni, Paola (författare)
- ENEA CR Frascati, Dept Fus & Technol Nucl Safety & Secur, Via E Fermi 45, I-00044 Rome, Italy.
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- Jozef Stefan Inst, Reactor Phys Dept, Jamova Cesta 39, Ljubljana 1000, Slovenia;Univ Ljubljana, Fac Math & Phys, Jamova Cesta 19, Ljubljana 1000, Slovenia. Jozef Stefan Inst, Reactor Phys Dept, Jamova Cesta 39, Ljubljana 1000, Slovenia. (creator_code:org_t)
- 2021-11-19
- 2021
- Engelska.
- Ingår i: ANIMMA2021 - Advancements in nuclear instrumentation measurement methods and their applications. - : EDP Sciences.
- Konferensbidrag (refereegranskat)
Abstract
Ämnesord
Stäng
- In the 2019 C38 Deuterium-Deuterium campaign at JET several different ITER-relevant materials and dosimetry foils were irradiated in a specially designed long-term irradiation station located inside the vacuum vessel with the purpose of testing the activation of ITER materials by fusion neutrons. The samples were exposed to a neutron fluence of 1.9E14 n/cm(2) during JET discharges performed in the experimental campaign over a period of 5 months. Gamma ray spectroscopy measurements were performed on irradiated samples to determine the activation of different long-lived isotopes in the samples. Monte Carlo computational analysis was performed to support the experiment by using the measured neutron yield and irradiation time. In this paper we focus on the computational analysis of the dosimetry foils that are used in order to measure the local neutron energy spectrum and flux. The foils were chosen to cover different neutron energies: thus Yttrium and some of the Nickel and Cobalt reactions were used to determine the Deuterium-Tritium fusion fraction, while Scandium and Iron and some of the Nickel and Cobalt reactions were used for comparison of the computed activity with the experimental measurements. The obtained C/E values show a reasonably good agreement between calculated and measured activity, thus validating the computational methodology and providing the basis for the analysis of the ITER-relevant materials and future experiments performed at JET in the Deuterium-Tritium campaign.
Ämnesord
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Nyckelord
- JET
- Long Term Neutron Irradiation
- MCNP
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