The Anodic Reactions on Simulated Spent Fuel (SIMFUEL) in H<sub>2</sub>O<sub>2</sub>Solutions: Effect of Carbonate/Bicarbonate
Bibliographic record
Abstract
The anodic behavior of simulated nuclear fuel (SIMFUEL) in solutions containing H 2 O 2 and HCO 3 − /CO 3 2− has been studied electrochemically and using surface analytical techniques, in particular X-ray photoelectron spectroscopy. Two anodic reactions are possible, the oxidative dissolution of UO 2 and H 2 O 2 oxidation. The rates of both reactions are controlled by the chemical release of U VI surface species, and can both be increased by the addition of HCO 3 − /CO 3 2− . Under anodic conditions the dominant reaction is H 2 O 2 oxidation, although UO 2 dissolution may also be accelerated by the formation of a uranyl peroxocarbonate complex. Similarly, under open circuit (corrosion) conditions both UO 2 corrosion and H 2 O 2 decomposition are also controlled by the rate of release of U VI surface species which blocks access of H 2 O 2 to the underlying conductive U IV 1–2 x U V 2 x O 2+ x surface. Presently, the balance between these two reactions is not known.
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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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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".