Enhancement of Downward-Facing Saturated 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 K. Potter

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

In-vessel retention by passive external reactor vessel cooling under severe accident conditions is a viable approach for retention of 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 microporous coating on the outer surface of a simulated reactor lower head. Quenching experiments were performed under simulated in-vessel retention by passive external reactor vessel cooling 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 critical heat flux (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 > 88%.

Original languageEnglish (US)
Pages (from-to)113-122
Number of pages10
JournalNuclear Engineering and Technology
Volume49
Issue number1
DOIs
StatePublished - Feb 1 2017

Fingerprint

Facings
Boiling liquids
Heat flux
Heat transfer
Coatings
Cooling
Coating techniques
Quenching
Accidents
Experiments

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering

Cite this

@article{984af36791814030928ae53f77e9e8bc,
title = "Enhancement of Downward-Facing Saturated Boiling Heat Transfer by the Cold Spray Technique",
abstract = "In-vessel retention by passive external reactor vessel cooling under severe accident conditions is a viable approach for retention of 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 microporous coating on the outer surface of a simulated reactor lower head. Quenching experiments were performed under simulated in-vessel retention by passive external reactor vessel cooling 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 critical heat flux (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 > 88{\%}.",
author = "Sohag, {Faruk A.} and Faith Beck and Lokanath Mohanta and Cheung, {Fan-bill B.} and Segall, {Albert Eliot} and Eden, {Timothy John} and Potter, {John K.}",
year = "2017",
month = "2",
day = "1",
doi = "10.1016/j.net.2016.08.005",
language = "English (US)",
volume = "49",
pages = "113--122",
journal = "Nuclear Engineering and Technology",
issn = "1738-5733",
publisher = "Korean Nuclear Society",
number = "1",

}

Enhancement of Downward-Facing Saturated Boiling Heat Transfer by the Cold Spray Technique. / Sohag, Faruk A.; Beck, Faith; Mohanta, Lokanath; Cheung, Fan-bill B.; Segall, Albert Eliot; Eden, Timothy John; Potter, John K.

In: Nuclear Engineering and Technology, Vol. 49, No. 1, 01.02.2017, p. 113-122.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Enhancement of Downward-Facing Saturated 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 K.

PY - 2017/2/1

Y1 - 2017/2/1

N2 - In-vessel retention by passive external reactor vessel cooling under severe accident conditions is a viable approach for retention of 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 microporous coating on the outer surface of a simulated reactor lower head. Quenching experiments were performed under simulated in-vessel retention by passive external reactor vessel cooling 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 critical heat flux (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 > 88%.

AB - In-vessel retention by passive external reactor vessel cooling under severe accident conditions is a viable approach for retention of 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 microporous coating on the outer surface of a simulated reactor lower head. Quenching experiments were performed under simulated in-vessel retention by passive external reactor vessel cooling 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 critical heat flux (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 > 88%.

UR - http://www.scopus.com/inward/record.url?scp=84995738103&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84995738103&partnerID=8YFLogxK

U2 - 10.1016/j.net.2016.08.005

DO - 10.1016/j.net.2016.08.005

M3 - Article

AN - SCOPUS:84995738103

VL - 49

SP - 113

EP - 122

JO - Nuclear Engineering and Technology

JF - Nuclear Engineering and Technology

SN - 1738-5733

IS - 1

ER -