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

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

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

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

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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 language	English (US)
Title of host publication	International Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015
Publisher	American Nuclear Society
Pages	5084-5097
Number of pages	14
Volume	6
ISBN (Electronic)	9781510811843
State	Published - 2015
Event	16th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2015 - Chicago, United States Duration: Aug 30 2015 → Sep 4 2015

Other

Other	16th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2015
Country/Territory	United States
City	Chicago
Period	8/30/15 → 9/4/15

All Science Journal Classification (ASJC) codes

Instrumentation
Nuclear Energy and Engineering

Cite this

@inproceedings{9503dd343d34498d83be933fb980df47,

title = "Enhancement of downward facing boiling heat transfer by the cold spray technique",

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%.",

author = "Sohag, {Faruk A.} and Faith Beck and Lokanath Mohanta and Cheung, {Fan-bill B.} and Segall, {Albert Eliot} and Eden, {Timothy John} and John Potter",

year = "2015",

language = "English (US)",

volume = "6",

pages = "5084--5097",

booktitle = "International Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015",

publisher = "American Nuclear Society",

address = "United States",

note = "16th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2015 ; Conference date: 30-08-2015 Through 04-09-2015",

}

Sohag, FA, Beck, F, 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.

TY - GEN

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

AU - Sohag, Faruk A.

AU - Beck, Faith

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

AN - SCOPUS:84964034485

VL - 6

SP - 5084

EP - 5097

BT - International Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015

PB - American Nuclear Society

T2 - 16th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2015

Y2 - 30 August 2015 through 4 September 2015

ER -

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

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