Quenching heat transfer analysis of accident tolerant coated fuel cladding

Seshadri, Arunkumar; Shirvan, Koroush

doi:10.1016/j.nucengdes.2018.07.020

Cited by 30 publications

(4 citation statements)

References 30 publications

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“…After each subsequent quench, the nanoparticles deposited on the surface of the rod were also increased. It was concluded that the increase of surface roughness due to the deposition of nanoparticles was responsible for the improved quench boiling heat transfer [17]. In this case, the nanoparticles deposited showed a positive increment in the quenching of the copper rod, similar to the results obtained in the study by Kim et al [27].…”

Section: Resultssupporting

confidence: 86%

Heat Transfer Characteristics of Metallic Body during Quenching in Saturated Nanofluids

Ismail

Sulaiman

Okawa

2022

IJAME

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Heat transfer characteristics (HTCs) of a metallic rod during quenching were investigated in saturated water-based nanofluids and the results were compared to distilled water. In this study, a 50 mm length of cylindrical copper rod with a diameter of 15 mm was rapidly quenched at an initial temperature of 600 ℃ in saturated water-based nanofluids under atmospheric pressure. Three different types of nanoparticles (Al2O3, SiO2 and TiO2) were used to obtain water-based nanofluids with 0.001% particle volume fraction. In this experiment, heat transfer rates were evaluated using the cooling curves (temperature vs time) of the copper rod quenched in different quenching media. Results showed that the quenching heat transfer in nanofluids was stochastic during the first quenching, with SiO2 showing a deterioration in HTC, enhancement was observed in Al2O3 and TiO2 compared to distilled water in the present work. However, after successive quenching, from second to seventh, all nanofluids demonstrated enhancement in the cooling time, with quenching in TiO2 nanofluid showing the most significant enhancement compared to distilled water. Some deposition of nanoparticles on the surface of the rod was noticed, due to oxidation in distilled water quench, and mixed oxidation and nanoparticles deposition in the nanofluid quench. The present work suggested oxidation lead to deterioration of HTC, but a mixed effect of oxidation and nanoparticles deposition during the quenching process, altered the surface roughness of the rod surface and improved wettability. Hence, it was possible that the effect of surface structure vapour during film boiling influenced the dynamics of the bubbles in nucleate boiling and therefore enhanced the rapid cooling of the rod.

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Section: Resultssupporting

confidence: 86%

Heat Transfer Characteristics of Metallic Body during Quenching in Saturated Nanofluids

Ismail

Sulaiman

Okawa

2022

IJAME

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“…Stepanek et al [21] also found the same dependence of quench front velocity on coolant subcooling and initial temperature from the reflood quenching of stainless steel (SS) rod. The quench front velocity of this experiment agrees well with the previous experimental data of Seshadri and Shirvan [13], and Stepanek et al [21], as shown in Figure 17. The CrAl-coated Zr appears to show slightly higher quench front velocity than the Zr at Tw = 800 • C. However, the quench front velocity of CrAl-coated Zr is lower than the Zr one at Tw = 600 • C. Hence, it can be judged that the quench front velocity of CrAl-coated Zr is comparable to the Zr result.…”

Section: Quenching Performance Of Cral-coated Zr Claddingsupporting

confidence: 92%

“…Seshadri and Shirvan [13] experimentally analyzed the cooling performance of various coating materials on Zircaloy-4 (Zry-4) rods. The coating materials are chromium, FeCrAl, and molybdenum.…”

Section: Introductionmentioning

confidence: 99%

Quenching Experiments with CrAl-coated Zircaloy Cladding in Reflooding Water Flows

Lee

2021

Energies

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A quenching experiment is performed to investigate the heat transfer characteristics and cooling performance of CrAl-coated Zircaloy (Zr) cladding in a water flow. The CrAl-coated Zr cladding is one of the accident tolerant fuels for light water reactors. The uncoated Zr cladding is also used in this quenching experiment for comparison. This experiment simulates reflood quenching of fuel rod during loss of coolant accident (LOCA) in nuclear power plant. The test conditions were determined to represent the peak cladding temperature, the coolant subcooling and the reflood velocity in the event of LOCA. The flow visualization showed the film boiling during early stage of reflood quenching and the transition to nucleate boiling. The film layer decreases as the coolant subcooling increases and becomes wavy as the reflood velocity increases. The CrAl-coated Zr cladding showed more wavy and thinner film than the uncoated Zr cladding. The rewetting temperature increases as the initial wall temperature and/or the coolant subcooling increases. The quench front velocity increases significantly as the coolant subcooling increases. The reflood velocity has a negligible effect on rewetting temperature and quench front velocity.

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“…More data is expected from ongoing lead test rod (LTR) and lead test assembly (LTA) programmes with follow-on post-irradiation examinations (PIE) as indicated by column L in the coated zirconium cladding evaluation table. There have been both positive and negative impacts on coated cladding performance reported in public literature on fatigue, CRUD deposition, heat transfer characteristics and pool-boiling critical heat flux (CHF), as well as ballooning, burst and quenching [24][25][26][27][28][29][30]. The inconsistencies of the reported effects seem to depend on the particular deposition parameters and coating design, and some of the available results are not performed in representative conditions.…”

Section: • Westinghouse Electric Company (Wec) Is Developing Cr Depos...mentioning

confidence: 99%

Applicability of Nuclear Fuel Safety Criteria to Accident-Tolerant Fuel Designs

2022

CSNI Technical Opinion Papers

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The OECD is a unique forum where the governments of 38 democracies work together to address the economic, social and environmental challenges of globalisation. The OECD is also at the forefront of efforts to understand and to help governments respond to new developments and concerns, such as corporate governance, the information economy and the challenges of an ageing population. The Organisation provides a setting where governments can compare policy experiences, seek answers to common problems, identify good practice and work to co-ordinate domestic and international policies.

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Quenching heat transfer analysis of accident tolerant coated fuel cladding

Cited by 30 publications

References 30 publications

Heat Transfer Characteristics of Metallic Body during Quenching in Saturated Nanofluids

Heat Transfer Characteristics of Metallic Body during Quenching in Saturated Nanofluids

Quenching Experiments with CrAl-coated Zircaloy Cladding in Reflooding Water Flows

Applicability of Nuclear Fuel Safety Criteria to Accident-Tolerant Fuel Designs

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