Enhancement of Downward-Facing Saturated Boiling Heat Transfer by the Cold Spray Technique

Faruk A. Sohag; Faith R. Beck; Lokanath Mohanta; Fan-Bill Cheung; Albert E. Segall; Timothy J. Eden; John K. Potter

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저자정보: Faruk A. Sohag Faith R. Beck Lokanath Mohanta Fan-Bill Cheung Albert E. Segall Timothy J. Eden John K. Potter

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제49권 제1호

발행연도: 2017.1

수록면: 124 - 133 (10page)

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In-vessel retention by passive external reactor vessel cooling under severe accident conditionsis 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 readilybe applied to operating and advanced reactors was developed to form a microporouscoating on the outer surface of a simulated reactor lower head. Quenching experimentswere performed under simulated in-vessel retention by passive external reactor vesselcooling conditions using test vessels with and without cold spray coatings. Quantitativemeasurements show that for all angular locations on the vessel outer surface, the localcritical heat flux (CHF) values for the coated vessel were consistently higher than thecorresponding CHF values for the bare vessel. However, it was also observed for bothcoated and uncoated surfaces that the local rate of boiling and local CHF limit varyappreciably along the outer surface of the test vessel. Nonetheless, results of this intriguingstudy clearly show that the use of cold spray coatings could enhance the local CHF limit fordownward-facing boiling by > 88%.

#Cold Spray #Critical Heat Flux Limit #Downward-Facing Boiling #In-vessel Retention #Microporous Coating

참고문헌 (21)

참고문헌 신청

A. E. Segall / 1998 / A cold gas spray coating process for enhancing titanium / Proceedings of the Symposium on Innovations in Titanium Held at the 127th TMS Annual Meeting : 52 ~

A. Papyrin / 1992 / New Materials and Technologies / Nauka : 146 ~ 168

F. B. Cheung / 1997 / A hydrodynamic critical heat flux model for saturated pool boiling on a downward facing curved heating surface / Int. J. Heat Mass Transf 40 : 1291 ~ 13

F. B. Cheung / 1997 / Critical Heat Flux (CHF)Phenomenon on a Downward Facing Curved Surface: Effects of Thermal Insulation

F. B. Cheung / 2003 / On the enhancement of external reactor vessel cooling of high-power reactors / 10th International Topical Meeting on Nuclear Reactor Thermalhydraulics (NURETH

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