Geomechanical Characterisation and Long-term Emplacement room Stability Analysis, Ontario Power Generation's proposed Deep Geologic Repository, Tiverton, Ontario
Bibliographic record
Abstract
The Nuclear Waste Management Organization (NWMO) is conducting geoscientific investigations as part of an on-going Environmental Assessment for development of a Deep Geologic Repository for Ontario Power Generation’s Low and Intermediate Level Radioactive Waste at the Bruce nuclear site, located near Tiverton, Ontario. The Bruce nuclear site is situated on the eastern flank of the Michigan Basin and is underlain by an 840 m thick Paleozoic sequence of near horizontally bedded dolostones, limestones, shales, evaporites and minor sandstones of Cambrian to Devonian age. As envisioned, the DGR would be excavated within the Cobourg Formation, a nominal 28 m thick argillaceous limestone formation at a depth of 680 m below ground surface. An important and unique aspect of the DGR is the assessment of long-term stability of the host and enclosing bedrock formations. This paper describes the geoscientific program as it relates to the derivation of geomechanical properties and characteristics, and numerical simulations performed to understand long-term formation stability and barrier integrity.
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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 | 0.000 | 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 | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 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".