Evaluation Charts of Thermal Stresses in Cylindrical Vessels Induced by Thermal Stratification of Contained Fluid

Furuhashi, Ichiro; Kawasaki, Nobuchika; Kasahara, Naoto

doi:10.1299/kikaia.73.686

Cited by 4 publications

(7 citation statements)

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“…Using the eigen-function expansion method (Carslaw & Jeager, 1959), the steady-state vessel wall temperature, T(x,z), was obtained as the following equation (Furuhashi et al, 2007(Furuhashi et al, , 2008.…”

Section: 1mentioning

confidence: 99%

“…Then, we tried to obtain an approximate simple solution that allows easy calculation based on the temperature profile method (Katto, 1964). The axial profile of wall-averaged temperature is approximated by the following equation (Furuhashi et al, 2007(Furuhashi et al, , 2008 …”

Section: 1mentioning

confidence: 99%

“…(11) and (12) are equivalent in the steady-state, then the coefficient b can be obtained by the following equation (Furuhashi et al, 2007(Furuhashi et al, , 2008.…”

Section: 1mentioning

confidence: 99%

“…(30), the wall-averaged temperature of the vessel was obtained by convolution integral as the following equation (Furuhashi et al, 2007(Furuhashi et al, , 2008. The radial displacement for the ramp-shaped fluid temperature profile was obtained by convolution integral as the following equation (Furuhashi et al, 2007(Furuhashi et al, , 2008. …”

Section: Ramp-shaped Fluid Temperature Profilementioning

confidence: 99%

See 3 more Smart Citations

Stress of Vertical Cylindrical Vessel for Thermal Stratification of Contained Fluid

Furuhashi¹

2011

Heat Analysis and Thermodynamic Effects

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Section: 1mentioning

confidence: 99%

Section: 1mentioning

confidence: 99%

“…(11) and (12) are equivalent in the steady-state, then the coefficient b can be obtained by the following equation (Furuhashi et al, 2007(Furuhashi et al, , 2008.…”

Section: 1mentioning

confidence: 99%

Section: Ramp-shaped Fluid Temperature Profilementioning

confidence: 99%

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Stress of Vertical Cylindrical Vessel for Thermal Stratification of Contained Fluid

Furuhashi¹

2011

Heat Analysis and Thermodynamic Effects

Self Cite

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“…In the case of 30 mm thickness of the reactor vessel, the limit of thermal stress obtained from the shell theory 11) was approximately 370 MPa. It is required that the thermal stress due to the temperature gradient is reduced to the limit of thermal stress in the reactor vessel.…”

Section: Introductionmentioning

confidence: 96%

Experimental Study on Thermal Stratification in a Reactor Vessel of Innovative Sodium-Cooled Fast Reactor—Mitigation Approach of Temperature Gradient across Stratification Interface—

Kimura

Miyakoshi

Kamide

2010

Journal of Nuclear Science and Technology

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An innovative sodium-cooled fast reactor has been investigated as part of the fast reactor cycle technology development project (FaCT). Thermal stratification after a scram is one of the main thermal loads of a reactor vessel (R/V). R/V has an upper inner structure (UIS), which consists of perforated horizontal plates and control rod guide tubes, and has a slit in the radial direction for fuel handling. The UIS slit causes an asymmetric flow pattern in R/V. A water experiment using a 1/10-scale model was carried out. A steep temperature gradient across the stratification interface was observed at the neighborhood of the UIS slit in the experiment. This means that the jet through the UIS slit entrains the bottom of the stratification interface. In order to mitigate the temperature gradient across the stratification interface, the height of a plug, which was installed in the upper plenum to infill a hole at the dipped plates where a fuel handling machine was inserted during a fuel exchange operation, was changed as the parameter in the experiment. The experimental result shows that the temperature gradient near the R/V wall in the case of the lower plug position was 21% smaller than that in the case of the higher plug position. This reduction of the temperature gradient was sufficient to maintain the structural integrity of the R/V wall against the thermal stratification.

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Thermo-mechanical parametric analysis of packed-bed thermocline energy storage tanks

et al. 2016

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© 2016. This version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/A packed-bed thermocline tank represents a proved cheaper thermal energy storage for concentrated solar power plants compared with the commonly-built two-tank system. However, its implementation has been stopped mainly due to the vessel’s thermal ratcheting concern, which would compromise its structural integrity. In order to have a better understanding of the commercial viability of thermocline approach, regarding energetic effectiveness and structural reliability, a new numerical simulation platform has been developed. The model dynamically solves and couples all the significant components of the subsystem, being able to evaluate its thermal and mechanical response over plant normal operation. The filler material is considered as a cohesionless bulk solid with thermal expansion. For the stresses on the tank wall the general thermoelastic theory is used. First, the numerical model is validated with the Solar One thermocline case, and then a parametric analysis is carried out by settling this storage technology in two real plants with a temperature rise of 100 °C and 275 °C. The numerical results show a better storage performance together with the lowest temperature difference, but both options achieve suitable structural factors of safety with a proper design.Peer ReviewedPostprint (author's final draft

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Evaluation Charts of Thermal Stresses in Cylindrical Vessels Induced by Thermal Stratification of Contained Fluid

Cited by 4 publications

References 0 publications

Stress of Vertical Cylindrical Vessel for Thermal Stratification of Contained Fluid

Stress of Vertical Cylindrical Vessel for Thermal Stratification of Contained Fluid

Experimental Study on Thermal Stratification in a Reactor Vessel of Innovative Sodium-Cooled Fast Reactor—Mitigation Approach of Temperature Gradient across Stratification Interface—

Thermo-mechanical parametric analysis of packed-bed thermocline energy storage tanks

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