ITER materials irradiation within the D-T neutron environment at JET: post-irradiation radioactivity analysis following the DTE2 experimental campaign

被引：1

作者：

Packer, L. W. ^{[1
]}

Batistoni, P. ^{[2
]}

Bearcroft, C. ^{[1
]}

Bradnam, S. C. ^{[1
]}

Eardley, E. ^{[1
]}

Fabbri, M. ^{[5
]}

Fonnesu, N. ^{[2
]}

Gilbert, M. R. ^{[1
]}

Ghani, Z. ^{[1
]}

Gorzkiewicz, K. ^{[3
]}

Grove, C. L. ^{[1
]}

Kierepko, R. ^{[3
]}

Laszynska, E. ^{[4
]}

Lengar, I. ^{[8
]}

Litaudon, X. ^{[6
]}

Loreti, S. ^{[2
]}

Mietelski, J. W. ^{[3
]}

Pillon, M. ^{[2
]}

Savva, M. I. ^{[7
]}

Shand, C. R. ^{[1
]}

Stamatelatos, I. E. ^{[7
]}

Turner, A. N. ^{[1
]}

Vasilopoulou, T. ^{[7
]}

Villari, R. ^{[2
]}

Wojcik-Gargula, A. ^{[3
]}

Zohar, A. ^{[8
]}

机构：

[1] United Kingdom Atom Energy Author, Culham Campus, Abingdon OX14 3DB, England

[2] ENEA Dept Fus & Technol Nucl Safety & Secur, Via E Fermi 45, Frascati, Rome, Italy

[3] Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland

[4] Inst Plasma Phys & Laser Microfus, PL-01497 Warsaw, Poland

[5] Fus Energy, Josep Pla 2,Torres Diagonal Litoral B3, Barcelona 8019, Spain

[6] CEA, IRFM, F-13108 St Paul Les Durance, France

[7] NCSR Demokritos, Inst Nucl & Radiol Sci Technol Energy & Safety, Athens 15310, Greece

[8] Jozef Stefan Inst, Reactor Phys Dept, Jamova Cesta 39, Ljubljana SI-1000, Slovenia

来源：

NUCLEAR FUSION | 2024年 / 64卷 / 10期

关键词：

neutronics; activation; ITER; JET; gamma spectrometry; ACTIVATION; OPERATIONS;

D O I：

10.1088/1741-4326/ad6f29

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

This work presents the results following the first irradiation of ITER materials samples in a tokamak D-T plasma environment operating at significant fusion power. The materials exposed to this nuclear environment at the Joint European Torus during the DTE2 experimental campaign that took place in 2021 include representative ITER samples from various components such as poloidal field coil jacket samples, toroidal field coil radial closure plate steels, EUROFER 97 steel, W and CuCrZr materials from the divertor, Inconel-718 and 316L stainless steel for blanket modules, as well as vacuum vessel forging samples. The experimental results discussed include high-resolution gamma spectrometry measurements and analysis conducted with the post-irradiated samples, of which there were 68 in total. These samples were exposed through different experimental campaigns, including deuterium, deuterium-tritium and tritium phases. Diagnostics that supported the analysis included 25 dosimetry foil-based neutron diagnostics and two 'VERDI' neutron spectrometry diagnostics. A further 12 samples for positron annihilation spectroscopy were also irradiated. The irradiation of all these samples took place in a long-term irradiation assembly located near the JET vacuum vessel. The post-irradiation analysis of the ITER material samples has yielded valuable insights into their material activation levels and radiation fields. Comparative assessments between experimental measurements and comprehensive neutronics simulations have demonstrated a significant level of agreement in this work, while also revealing some discrepancies in specific material instances. The data and interpretation from this work not only serve as a robust experimental foundation for enhancing the precision and predictability of neutronics simulation approaches for ITER and next-step devices but also present some opportunities for the refinement of simulation methodologies. In light of these findings, a series of recommendations have been proposed, aimed at improving confidence in nuclear predictions associated with materials that have been exposed to fusion nuclear environments and advancing understanding in this important domain.

引用

页数：24

共 1 条

[1] Technological exploitation of the JET neutron environment: progress in ITER materials irradiation and nuclear analysis
Packer, L. W.
Batistoni, P.
Bekris, N.
Bradnam, S. C.
Fabbri, M.
Ghani, Z.
Gilbert, M. R.
Kierepko, R.
Laszynska, E.
Leichtle, D.
Lengar, I.
Loreti, S.
Mietelski, J. W.
Nobs, C. R.
Pillon, M.
Savva, M. I.
Stamatelatos, I. E.
Vasilopoulou, T.
Wojcik-Gargula, A.
Zohar, A.
NUCLEAR FUSION, 2021, 61 (11)

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