Kapitza Conductance of Aluminum and Heat Transport from a Flat Surface through a Large-Diameter Tube to Saturated Helium II

1978 ◽  
pp. 340-348 ◽  
Author(s):  
S. W. Sciver
Keyword(s):  
Heat Transport ◽  
Flat Surface ◽  
Large Diameter ◽  
Helium Ii ◽  
Kapitza Conductance

Heat transport through helium II: Kapitza conductance

Cryogenics ◽  
1970 ◽  
Vol 10 (2) ◽  
pp. 89-95 ◽  
Author(s):  
N.S Snyder
Keyword(s):  
Heat Transport ◽  
Helium Ii ◽  
Kapitza Conductance

Superfluidity and Heat Transport in the Unsaturated Helium-II Film

1955 ◽  
Vol 98 (6) ◽  
pp. 1616-1622 ◽  
Author(s):  
Earl Long ◽  
Lothar Meyer
Keyword(s):  
Heat Transport ◽  
Helium Ii

Rupture Frequency of CANDU® Large-Diameter Primary Heat Transport Piping Estimated Using Probabilistic Fracture Mechanics Codes

2010 ◽  
Author(s):  
Rob McLean ◽  
Xinjian Duan ◽  
Michael J. Kozluk
Keyword(s):  
Pilot Study ◽  
Fracture Mechanics ◽  
Heat Transport ◽  
Large Diameter ◽  
Leak Detection ◽  
Detection Methods ◽  
Total Probability ◽  
Probabilistic Fracture Mechanics ◽  
Predicted Probability

This paper presents a pilot study of using probabilistic fracture mechanics codes (PRO-LOCA 2009 and WinPRAISE 2007) to estimate the rupture frequency of CANDU® large diameter Primary Heat Transport (PHT) piping. The results of this study show that WinPRAISE 2007 and PRO-LOCA 2009 produce comparable trends for the predicted probability of leak and probability of large break leak. There is a number of sensitive leak detection methods available in CANDU plants. The materials and quality of fabrication and sensitive leak detection results in the total probability of a large break leak in the large diameter PHT piping welds being estimated to be on the order of 1E−8 breaks per plant per year. The results of the pilot study indicate that probabilistic fracture mechanics codes could be used to demonstrate that a shutdown action limit of 100 kg/h is sufficient to ensure the probability of rupture of large diameter PHT piping welds is extremely low.

scholarly journals Cryogenic design for a high intensity ultracold neutron source at TRIUMF

2019 ◽  
Vol 219 ◽  
pp. 10001
Author(s):  
Shinsuke Kawasaki ◽  
Takahiro Okamura ◽  
Keyword(s):  
Heat Transport ◽  
Neutron Source ◽  
Superfluid Helium ◽  
High Intensity ◽  
Cold Neutron ◽  
Spallation Neutron Source ◽  
Cold Neutrons ◽  
Kapitza Conductance ◽  
Neutron Converter ◽  
Ultra Cold Neutron

The TUCAN (TRIUMF Ultra-Cold Advanced Neutron) collaboration has been developing a source of high-intensity ultra-cold neutrons for use in a neutron electric dipole search. The source is composed of a spallation neutron source and a superfluid helium ultra-cold neutron converter, surrounded by a cold moderator. The temperature of the superfluid helium needs to be maintained at approximately 1.0 K to suppress up-scattering by phonons. The Kapitza conductance and the heat transport by the superfluid helium are key parameters which need to be well characterized. We have therefore investigated them in first experiments. Current efforts are directed at optimizing the design of the helium cryostat.

Kapitza conductance of aluminium and heat transport through subcooled He II

Cryogenics ◽  
1978 ◽  
Vol 18 (9) ◽  
pp. 521-527 ◽  
Author(s):  
S.W. Van Sciver
Keyword(s):  
Heat Transport ◽  
Kapitza Conductance

scholarly journals The Transport of Heat Through Narrow Channels by Liquid Helium II

1955 ◽  
Vol 8 (2) ◽  
pp. 206 ◽  
Author(s):  
PG Klemens
Keyword(s):  
Temperature Gradient ◽  
Liquid Helium ◽  
Heat Transport ◽  
Reasonable Agreement ◽  
Normal Fluid ◽  
Narrow Channels ◽  
Helium Ii ◽  
Internal Convection

In narrow channels (~10?4 cm) the observed heat transport is considerably larger than calculated by the internal convection theory. It is suggested that, because of the anisotropy of the distribution cf phonons in the channel walls resulting from the temperature gradient, the normal fluid in the immediate vicinity of the walls is not at rest but flows towards the colder region. The magnitude of the resulting heat transport is in reasonable agreement with the observed discrepancy.

scholarly journals Transition to ballistic regime for heat transport in helium II

2014 ◽  
Vol 378 (34) ◽  
pp. 2471-2477 ◽  
Author(s):  
Michele Sciacca ◽  
Antonio Sellitto ◽  
David Jou
Keyword(s):  
Heat Transport ◽  
Ballistic Regime ◽  
Helium Ii
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