TY - JOUR
T1 - Effects of surface roughness, oxidation level, and liquid subcooling on the minimum film boiling temperature
AU - Sinha, J.
AU - Hochreiter, L. E.
AU - Cheung, Fan Bill
N1 - Funding Information:
Received 24 November 2001; accepted 1 May 2002. The authors wish to express their gratitude to Prof. Bernhard Tittman for suggesting the eddy-current technique and for the use of the scanning acoustic microscope in his lab. The authors also wish to thank Mr. Jeff Draper of Krautkramer Branso, Inc., for his help in the eddy-current measurements and for loaning the eddy-current instrument to us. This work was supported by the U.S. Nuclear Regulatory Commission under Contract NRC-04-98-041. The present address of J. Sinha is Arthur D. Little, Inc., Acorn Park, Cambridge, Massachusetts, USA. Address correspondence to Prof. Fan-Bill Cheung, Department of Mechanical and Nuclear Engineering, 304 Reber Bldg., Penn State University, University Park, PA 16802-1412. E-mail: [email protected]
PY - 2003
Y1 - 2003
N2 - The effects of surface roughness, oxidation level, and liquid subcooling on the minimum film boiling temperature, Tmin, during quenching of a nuclear fuel rod were investigated experimentally. An instrumented nuclear fuel rod simulator (FRS) was designed and fabricated with different combinations of cladding (Inconel and Zircaloy) and filler (BN and Al2O3) materials. Surface roughness was varied by polishing the FRS with different grades of emery cloth, whereas oxidation level was varied by heating the FRS in an oven under carefully controlled conditions for different time periods. An eddy-current device was used to nondestructively measure the oxide layer thickness on the FRS. Quenching experiments were conducted in a subcooled water bath and the value of Tmin was determined from the measured temperature transients. For the FRS explored in the experiments, the minimum film boiling temperature was found to depend strongly on the liquid subcooling, oxidation level, and surface roughness.
AB - The effects of surface roughness, oxidation level, and liquid subcooling on the minimum film boiling temperature, Tmin, during quenching of a nuclear fuel rod were investigated experimentally. An instrumented nuclear fuel rod simulator (FRS) was designed and fabricated with different combinations of cladding (Inconel and Zircaloy) and filler (BN and Al2O3) materials. Surface roughness was varied by polishing the FRS with different grades of emery cloth, whereas oxidation level was varied by heating the FRS in an oven under carefully controlled conditions for different time periods. An eddy-current device was used to nondestructively measure the oxide layer thickness on the FRS. Quenching experiments were conducted in a subcooled water bath and the value of Tmin was determined from the measured temperature transients. For the FRS explored in the experiments, the minimum film boiling temperature was found to depend strongly on the liquid subcooling, oxidation level, and surface roughness.
UR - http://www.scopus.com/inward/record.url?scp=0242569325&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0242569325&partnerID=8YFLogxK
U2 - 10.1080/08916150390126478
DO - 10.1080/08916150390126478
M3 - Article
AN - SCOPUS:0242569325
SN - 0891-6152
VL - 16
SP - 45
EP - 60
JO - Experimental Heat Transfer
JF - Experimental Heat Transfer
IS - 1
ER -