Bibliographic record
Abstract
destructive accident in what was then a fairly large thermal reactor; previous criticality accidents (with one exception) had been in experimental critical assemblies. The accident occurred in the NRX reactor at the Chalk River Nuclear Laboratories, about 125 miles north-west of Ottawa (Fig. 1). NRXwas a 30-MW research reactor which had then been operating for about 5 years. The accident was hardly spectacular from most points of view; no one was injured, no large area was seriously contaminated, the public was not frightened by reports of real or imagined dangers. However, this accident did effectively destroy the core of a reactor which at that time had the highest flux of any in the world. It then provided the first opportunity to explore the problems of dismantling a large reactor. Figs. 2 & 3 show the laboratory area, which is beside the Ottawa river and surrounded by a forested exclusion zone, about 4 miles in radius. *This oral presentation was part of a symposium on "Historical Perspective on Reactor Accidents", given at the annual meeting
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.012 | 0.008 |
| Scholarly communication | 0.005 | 0.002 |
| Open science | 0.001 | 0.003 |
| Research integrity | 0.004 | 0.004 |
| Insufficient payload (model declined to judge) | 0.042 | 0.010 |
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".