Adjuster Absorber Rods Return to Service at PLNGS
Bibliographic record
Abstract
Abstract The original CANDU® 600 design utilizes adjuster absorber (AA) rods to flatten the flux shape in the reactor core optimize power output, compensate for fuel burnup, provide excess reactivity to overcome 135Xe buildup following a power reduction, and allow for reactivity shim. At Point Lepreau Nuclear Generating Station (PLNGS) in 1999, adjuster absorber banks 6 and 7 were locked in the reactor core and removed from service. Later in 2019, adjuster absorber banks 1–5 were placed on manual. Since then, a significant program was put in place to restore adjuster banks 1–6 to service, which was successfully completed in October 2023. Adjuster absorber bank 7 remains locked in-core. This paper summarizes the rationale for removing the PLNGS adjuster absorbers from service, the effort required for their restoration, applicable lessons learned, and next steps.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 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) | 0.000 | 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 teacher head, 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".