Enhancement of downward facing boiling heat transfer by the cold spray technique

Faruk A. Sohag, Faith R. Beck, Lokanath Mohanta, Fan-bill B. Cheung, Albert Eliot Segall, Timothy John Eden, John Potter

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

In-vessel retention (IVR) by passive external reactor vessel cooling (ERVC) under severe accident conditions is a viable approach to retaining radioactive core melt within the reactor vessel. In this study, a new and versatile coating technique known as "Cold Spray'' that can readily be applied to operating and advanced reactors was developed to form a micro-porous coating on the outer surface of a simulated reactor lower head. Quenching experiments were performed under simulated IVR-ERVC conditions using test vessels with and without Cold Spray coatings. Quantitative measurements show that for all angular locations on the vessel outer surface, the local CHF values for the coated vessel were consistently higher than the corresponding CHF values for the bare vessel. However, it was also observed for both coated and uncoated surfaces that the local rate of boiling and local CHF limit vary appreciably along the outer surface of the test vessel. Nonetheless, results of this intriguing study clearly show that the use of Cold Spray coatings could enhance the local CHF limit for downward facing boiling by more than 90%.

Original languageEnglish (US)
Title of host publicationInternational Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015
PublisherAmerican Nuclear Society
Pages5084-5097
Number of pages14
Volume6
ISBN (Electronic)9781510811843
StatePublished - 2015
Event16th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2015 - Chicago, United States
Duration: Aug 30 2015Sep 4 2015

Other

Other16th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2015
CountryUnited States
CityChicago
Period8/30/159/4/15

Fingerprint

boiling
Boiling liquids
vessels
sprayers
heat transfer
Heat transfer
augmentation
Coatings
reactors
Cooling
Coating techniques
Quenching
Accidents
coatings
cooling
accidents
retaining
Experiments
coating
quenching

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Nuclear Energy and Engineering

Cite this

Sohag, F. A., Beck, F. R., Mohanta, L., Cheung, F. B., Segall, A. E., Eden, T. J., & Potter, J. (2015). Enhancement of downward facing boiling heat transfer by the cold spray technique. In International Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015 (Vol. 6, pp. 5084-5097). American Nuclear Society.
Sohag, Faruk A. ; Beck, Faith R. ; Mohanta, Lokanath ; Cheung, Fan-bill B. ; Segall, Albert Eliot ; Eden, Timothy John ; Potter, John. / Enhancement of downward facing boiling heat transfer by the cold spray technique. International Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015. Vol. 6 American Nuclear Society, 2015. pp. 5084-5097
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abstract = "In-vessel retention (IVR) by passive external reactor vessel cooling (ERVC) under severe accident conditions is a viable approach to retaining radioactive core melt within the reactor vessel. In this study, a new and versatile coating technique known as {"}Cold Spray'' that can readily be applied to operating and advanced reactors was developed to form a micro-porous coating on the outer surface of a simulated reactor lower head. Quenching experiments were performed under simulated IVR-ERVC conditions using test vessels with and without Cold Spray coatings. Quantitative measurements show that for all angular locations on the vessel outer surface, the local CHF values for the coated vessel were consistently higher than the corresponding CHF values for the bare vessel. However, it was also observed for both coated and uncoated surfaces that the local rate of boiling and local CHF limit vary appreciably along the outer surface of the test vessel. Nonetheless, results of this intriguing study clearly show that the use of Cold Spray coatings could enhance the local CHF limit for downward facing boiling by more than 90{\%}.",
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Sohag, FA, Beck, FR, Mohanta, L, Cheung, FB, Segall, AE, Eden, TJ & Potter, J 2015, Enhancement of downward facing boiling heat transfer by the cold spray technique. in International Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015. vol. 6, American Nuclear Society, pp. 5084-5097, 16th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2015, Chicago, United States, 8/30/15.

Enhancement of downward facing boiling heat transfer by the cold spray technique. / Sohag, Faruk A.; Beck, Faith R.; Mohanta, Lokanath; Cheung, Fan-bill B.; Segall, Albert Eliot; Eden, Timothy John; Potter, John.

International Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015. Vol. 6 American Nuclear Society, 2015. p. 5084-5097.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Enhancement of downward facing boiling heat transfer by the cold spray technique

AU - Sohag, Faruk A.

AU - Beck, Faith R.

AU - Mohanta, Lokanath

AU - Cheung, Fan-bill B.

AU - Segall, Albert Eliot

AU - Eden, Timothy John

AU - Potter, John

PY - 2015

Y1 - 2015

N2 - In-vessel retention (IVR) by passive external reactor vessel cooling (ERVC) under severe accident conditions is a viable approach to retaining radioactive core melt within the reactor vessel. In this study, a new and versatile coating technique known as "Cold Spray'' that can readily be applied to operating and advanced reactors was developed to form a micro-porous coating on the outer surface of a simulated reactor lower head. Quenching experiments were performed under simulated IVR-ERVC conditions using test vessels with and without Cold Spray coatings. Quantitative measurements show that for all angular locations on the vessel outer surface, the local CHF values for the coated vessel were consistently higher than the corresponding CHF values for the bare vessel. However, it was also observed for both coated and uncoated surfaces that the local rate of boiling and local CHF limit vary appreciably along the outer surface of the test vessel. Nonetheless, results of this intriguing study clearly show that the use of Cold Spray coatings could enhance the local CHF limit for downward facing boiling by more than 90%.

AB - In-vessel retention (IVR) by passive external reactor vessel cooling (ERVC) under severe accident conditions is a viable approach to retaining radioactive core melt within the reactor vessel. In this study, a new and versatile coating technique known as "Cold Spray'' that can readily be applied to operating and advanced reactors was developed to form a micro-porous coating on the outer surface of a simulated reactor lower head. Quenching experiments were performed under simulated IVR-ERVC conditions using test vessels with and without Cold Spray coatings. Quantitative measurements show that for all angular locations on the vessel outer surface, the local CHF values for the coated vessel were consistently higher than the corresponding CHF values for the bare vessel. However, it was also observed for both coated and uncoated surfaces that the local rate of boiling and local CHF limit vary appreciably along the outer surface of the test vessel. Nonetheless, results of this intriguing study clearly show that the use of Cold Spray coatings could enhance the local CHF limit for downward facing boiling by more than 90%.

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M3 - Conference contribution

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Sohag FA, Beck FR, Mohanta L, Cheung FB, Segall AE, Eden TJ et al. Enhancement of downward facing boiling heat transfer by the cold spray technique. In International Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015. Vol. 6. American Nuclear Society. 2015. p. 5084-5097