On Design and Analysis of Fastener Locking Tabs in Highly Chaotic Flow of Primary Side of Steam Generator
Bibliographic record
Abstract
Abstract The primary side of steam generators has a divider plate which separates the heavy water entrance and exit of flow when entering in and out of the U-tubes of tubesheet. The divider plate has a series of plates which are connected by bolting. The bolted connections have positive locking device which prevents the connection from loosening in the highly vibrating turbulent flow conditions. These positive locking devices were failed by breaking into pieces at different occasions and a few cycle of design were completed to address this design failures. In the latest design modification a new design was proposed. The new design was applied to many steam generators. It has proven to be robust with respect to durability, strength and ease of installation. The new design has reduced outage time and activities. It is also reduces radiation exposure while improving conventional safety. The paper describes the design processes and addresses key design and analysis parameters. A Finite Element model was developed to facilitate assessment design calculation. Structural integrity of the newly design part was assessed against ASME Boiler and Pressure Vessel codes. A flow-induced vibration was completed to address fluid-structure interactions.
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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".