Investigation of tritium pathways in the Joint European Torus (JET) tokamak

Journal Article · Sat May 01 04:00:00 EDT 1999 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.873454· OSTI ID:344930

Hillis, D L; Hogan, J T ^[1]; Andrew, P; Coad, J P; Ehrenberg, J K; Groth, M ^[2]; Houlberg, W A ^[1]; von Hellermann, M; Horton, L D; Matthews, G F; Monk, R D; Morgan, P D; Stamp, M F; Zastrow, K ^[2]

---

1. Oak Ridge National Laboratory, P.O. Box 2009, Oak Ridge, Tennessee 37831-8072 (United States)
2. JET Joint Undertaking, Abingdon OX14 3EA (United Kingdom)

The neutral tritium concentration in the subdivertor region of JET [P.-H. Rebut, R. J. Bickerton, and B. E. Keen, Nucl. Fusion {bold 25}, 1011 (1985)] is measured during deuterium-to-tritium changeover experiments with a novel species-selective Penning gauge coupled to a high-resolution spectrometer. The subdivertor measurements, when compared with edge and strike point values, are a sensitive characterization of the status of the wall saturation. The neutral transport code (EIRENE) [D. Reiter, Forschungszentrum, Juelich: Report Juel-2599 (1992)] and a wall hydrogen trapping and diffusion code (WDIFFUSE) [J. Hogan, R. Maingi, P. Mioduszewski {ital et al.}, J. Nucl. Mater. {bold 241}, 612 (1997)] evaluate the wall tritium recycling coefficients (R{sub T}) and compare them with quantitative, testable models for the dynamic exchange between recycling surfaces and the edge/pedestal region. Using the dynamic inventory model, tritium transport following the injection of trace amounts of tritium has been investigated for JET high-confinement mode (H-mode) discharges with Edge Localized Modes (ELMs). Upon explicitly treating the ELMs as instantaneous magnetohydrodynamic events, residual (intra-ELM) radial diffusivities are reduced and can be compared with neoclassical levels. {copyright} {ital 1999 American Institute of Physics.}

• OSTI ID: 344930
• Report Number(s): CONF-981127--
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 6; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
JET TOKAMAK
MAGNETOHYDRODYNAMICS
NEUTRAL-PARTICLE TRANSPORT
PLASMA DIAGNOSTICS
PLASMA IMPURITIES
PLASMA SIMULATION
TOKAMAK DEVICES
TRITIUM