Heat transfer of a spray droplet in a PWR pressurizer

Jo, Jong Chull; Lee, Sang Kyoon; Shin, Won

doi:10.1007/bf02953612

Cited by 3 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Lee [3] and his colleagues studied the mutual relation of separation and orientation of fiber in press molding of long fiber reinforced thermoforming composite sheets, Lee [4] and his colleagues the mutual relation of separation orientation in the progress to mold the long fiber reinforced thermoforming composite materials, and Jo [5] and his colleagues the fiber orientation by image process in press molding of long fiber reinforced thermoforming composite sheets.…”

Section: Introductionmentioning

confidence: 99%

Effect of Fiber Orientation on the Tensile Strength in Fiber-Reinforced Polymeric Composite Materials

Kim

Lee

2005

KEM

View full text Add to dashboard Cite

The study for strength calculation of one way fiber-reinforced composites and the study measuring precisely fiber orientation distribution were presented. However, because the DB that can predict mechanical properties of composite material and fiber orientation distribution by the fiber content ratio was not constructed, we need the systematic study for that. Therefore, in this study, we investigated what effect the fiber content ratio and fiber orientation distribution have on the strength of composite sheet after making fiber reinforced polymeric composite sheet by changing fiber orientation distribution with the fiber content ratio. The result of this study will become a guide to design data of the most suitable parts design or fiber reinforced polymeric composite sheet that uses the fiber reinforced polymeric composite sheet in industry spot, because it was conducted in terms of developing products. We studied the effect the fiber orientation distribution has on tensile strength of fiber reinforced polymeric composite material and achieved this results below. We can say that the increasing range of the value of fiber reinforced polymeric composite’s tensile strength in the direction of fiber orientation is getting wider as the fiber content ratio increases. It shows that the value of fiber reinforced polymeric composite’s tensile strength in the direction of fiber orientation 90° is similar with the value of polypropylene’s intensity when fiber orientation function is J= 0.7, regardless of the fiber content ratio. Tensile strength of fiber reinforced polymeric composite is affected by the fiber orientation distribution more than by the fiber content ratio.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Fiber Orientation on the Tensile Strength in Fiber-Reinforced Polymeric Composite Materials

Kim

Lee

2005

KEM

View full text Add to dashboard Cite

show abstract

“…Hence, much work concerning this matter has been done so far (Anttila, 1996 ;Anttila, 1999 ;Auerkar et aI., 1997;Raiko et aI., 1992;Raiko et al, 1996 ;Salo et aI., 1990;Werme et aI., 1995). But few domestic works concerning this matter have been conducted except for other topics (Jo et al, 1991 ;Kim et aI., 1994 ;Kwak et aI., 2000).…”

Section: Introductionmentioning

confidence: 99%

Structural analysis for the determination of design variables of spent nuclear fuel disposal canister

Kwon

Kang

Choi

et al. 2001

KSME International Journal

View full text Add to dashboard Cite

This paper presents the results of a structural analysis to determine design variables such as the inner basket array type, and thicknesses of the outer shell, and the lid and bottom of a spent nuclear fuel disposal canister. The canister construction type introduced here is a solid structure with a cast iron insert and a corrosion resistant overpack, which is designed for the spent nuclear fuel disposal in a deep repository in the crystalline bedrock, entailing an evenly distributed load of hydrostatic pressure from the groundwater and high swelling pressure from the bentonite buffer. Hence, the canister must be designed to withstand these high pressure loads. Many design variables may affect the structural strength of the canister. In this study, among those variables, the array type of inner baskets and thicknesses of outer shell and lid and bottom are attempted to be determined through a linear structural analysis. Canister types studied here are one for the pressurized water reactor (PWR) fuel and another for the Canadian deuterium and uranium reactor (CANDU) fuel.

show abstract

“…Xiangbin Li et al have carried out the scaling analysis of coolant spraying process in automatic depressurized system [6]. The heat transfer of spray droplets also have been investigated by Jo, Lee, and Shin [7]. In the Maanshan nuclear power plant, Taiwan, during normal operating condition (using one backup heater), the effect of a low fluid flow rate of 0.126 kg/s sprayed into the pressurizer was investigated by Y.H.…”

mentioning

confidence: 99%

Simulation of Spray Injection in the Pressurizer Using RELAP5

Dibyo

Susyadi

2017

Atom Indo.

View full text Add to dashboard Cite

A modeling research using RELAP5 to assess the pressurizer of a pressurized water reactor (PWR) power plant has been performed. The heater and water injection systems in the pressurizer system of the PWR are of great importance for system pressure control. The heater is designed to increase the pressure while the water sprayer injection is to perform depressurization. Most of studies conducted in the past mainly focused on determining the effects of nozzle spray design and droplet size using testing loops. The purpose of this simulation is to analyze the spray injection flow rate against the pressure characteristics of the pressurizer using RELAP5. Through this approach, the optimum injection flow rate of full scale plant pressurizer can be analyzed. The parameters investigated are pressure and temperature. In RELAP5, the pressurizer tank was modeled with six volume nodes and the heater was modeled by using heat structure. In the model, the sprayer takes water from the cold leg to inject it into the top of tank region. The results showed that the mass flow of about 4 kg/s is the most effective value to limit pressure in the pressurizer to below 15.7 MPa. However, the flow rates of 8 kg/s and more cause overpressure. This simulation is useful to complement the data related to the water flow rate injection systems of the pressurizer.

show abstract

Heat transfer of a spray droplet in a PWR pressurizer

Cited by 3 publications

References 15 publications

Effect of Fiber Orientation on the Tensile Strength in Fiber-Reinforced Polymeric Composite Materials

Effect of Fiber Orientation on the Tensile Strength in Fiber-Reinforced Polymeric Composite Materials

Structural analysis for the determination of design variables of spent nuclear fuel disposal canister

Simulation of Spray Injection in the Pressurizer Using RELAP5

Contact Info

Product

Resources

About