TRITIUM PERMEATION CHARACTERIZATION OF MATERIALS FOR FUSION AND GENERATION IV VERY HIGH TEMPERATURE REACTORS
Bibliographic record
Abstract
This paper summarizes the experimental tritium permeation rates of various barrier materials considered for fusion and Generation IV applications in the temperature range of 600–1000 °C.Determination of accurate permeation rates is important to design and engineer safe systems that are used in fusion reactors and in very high temperature reactors (VHTRs) of Generation IV. For fusion reactors, tritium permeation in the blanket region and fuel reprocessing area can contribute to loss of fusion fuel, environmental emissions, and worker dose. For VHTRs, tritium permeation in the main core and the intermediate heat exchangers can result in tritium contamination of the hydrogen production process.Testing is performed in a sample configuration that closely resembles the geometry of a tube-in-tube heat exchanger and the permeation rates are measured at high temperatures (500–1000 °C) using an induction heater. A permeation test is conducted with a thin-walled test strip welded in between stainless steel 304L heav...
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".