ICONE23-1375 Pressure-Drop Analysis of a Re-Entrant Fuel Channel In a Pressure-Channel Supercritical Water-Cooled Reactor
Bibliographic record
Abstract
Modern Generation-III Nuclear Power Plants (NPPs) equipped with water-cooled reactors have gross thermal efficiencies of approximately 30-36%, which are significantly less than those of advanced fossil-fuel and natural-gas thermal power plants (55-62%). Therefore, global effort to progress Generation-IV reactor concepts and NPPs are required to meet the demand for clean, non-fossil-based electrical production. The main objective of this paper is to determine a pressure drop across a fuel channel of a SuperCritical Water-cooled Reactor (SCWR). A generic 1200-MWel SCWR has inlet and outlet temperatures of 350°C and 650°C, respectively, and an inlet pressure of 25 MPa. With such high operating temperatures and pressures, an SCWR NPP can achieve gross thermal efficiencies of approximately 45 - 48%, which is a substantial improvement over the currently operating Generation-III NPPs. For this purpose, a Re-Entrant-Channel design and its associated 78-element fuel bundle are selected as a basis for this analysis. An investigation of a pressure drop resulting from friction, gravity, acceleration and local losses at supercritical conditions has been performed on a basis of one-dimensional steady-state analysis. With this objective, a thermal-hydraulic code has been created with MATLAB, which calculates the pressure drop across a 5-m heated length of a vertical fuel channel. The total pressure drop across the channel was estimated to be about 60 kPa.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".