Improving spent nuclear fuel vacuum drying efficiency via pump modulation at the liquid–vapor phase transition
Year: 2025
Type: article
Abstract: This study explores advanced vacuum drying strategies for spent nuclear fuel, focusing on thermodynamic optimization through precise pump modulation at phase transition boundaries. Utilizing a high-capacity vacuum pump within a 98-liter canister, the research underscores the critical role of dynamic pump performance in enhancing drying efficiency. A salient finding is the elevated average evaporation rate of 33.703 mg/s achieved by fine-tuning pump flow from 400 L/min near 10 torr to below 5 torr before finally setting at 100 L/min—surpassing direct transitions to 100 L/min. This demonstrates the potential for further optimization by exploiting sub-10 torr pressures, thus mitigating ice formation risks and boosting efficiency through targeted modulation. Comparative analysis illustrates improvements up to 3.486-fold when employing dual pump transitions, highlighting the transformative potential of adaptive pumping. Results confirm that strategic modulation fosters robust moisture removal, ensuring complete drying with pressures below three torr for 30 min, marking a significant advancement in nuclear fuel storage methodologies.
Source: Applied Thermal Engineering
Institution: Korea Atomic Energy Research Institute
Language: English
Subfield: Safety, Risk, Reliability and Quality
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,660
Award: G8555286149
OpenAlex ID: W4414802706