Thermalhydraulic Analysis of Steam Generators: Application of the Thirst Code to Vibration Analyses
Bibliographic record
Abstract
Flow-induced vibration concerns may be avoided by analysis, which requires the knowledge of flow patterns and the flow distribution in steam generators (SG). Typically, the distributions of flow velocity, fluid density, and, in the case of two-phase flow, distributions of steam quality and two-phase flow regime are needed. Generating this data is not straightforward because of the 3-dimensional nature of flow, complex steam generator geometry, and uncertainties associated with two-phase flow modelling. In this paper, the main features of THIRST, a thermalhydraulic code for recirculating SGs, are described. In addition, the effects of thermalhydraulic modelling and design features on velocity distributions and gap flow velocity needed for flow-induced vibration and fretting-wear calculations are discussed. These include an anisotropic resistance model in the U-bend region, design modifications in the U-bend region to reduce tube vibration, and the prediction of two-phase flow regimes.
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 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".