scholarly journals Analysis of Differential Die Away Instrument Simulated Performance Using Boiling Water Reactor Spent Fuel Assemblies

2014 ◽  
Author(s):  
Vladimir Henzl ◽  
Holly R. Trellue ◽  
Noah A. Fischer ◽  
Robert A. Jr. Weldon
Keyword(s):  
Boiling Water ◽  
Boiling Water Reactor ◽  
Spent Fuel ◽  
Water Reactor ◽  
Simulated Performance ◽  
Fuel Assemblies

Modeling of Fuel Assemblies in a Boiling Water Reactor for Seismic Analysis

2014 ◽  
Author(s):  
Yuichi Koide ◽  
Yoshihiro Goto ◽  
Yuki Sato ◽  
Shohei Onitsuka ◽  
Hirokuni Ishigaki
Keyword(s):  
Fuel Assembly ◽  
Seismic Analysis ◽  
Mass Matrix ◽  
Added Mass ◽  
Vibration Characteristics ◽  
Boiling Water ◽  
Boiling Water Reactor ◽  
Water Reactor ◽  
Excited Vibration ◽  
Fuel Assemblies

The purpose of this study is to develop a seismic analysis model of a group of fuel assemblies in a boiling water reactor and to confirm the validity of the developed model. Each fuel assembly was modeled as a beam on the basis of the finite element method. The mass matrix of the model includes an added mass matrix, which represents the coupled inertia effect caused by the coolant water, in order to simulate the coupled vibration of fuel assemblies. The added mass matrix was obtained by calculating the coefficient matrix of the acceleration vector and fluid force vector under the condition that each fuel assembly moves at unit acceleration. The validity of the model was confirmed by comparing the calculated results with experimental ones. The compared specimens for the experiments were full-scale mock-ups. The vibration characteristics of fuel assemblies in each case of 4 bodies and 368 bodies were compared. As a result of the comparison, the calculations of the frequency response were in agreement with the experimental results. Particularly, the calculation results on the resonance frequency were in good agreement, with an error of less than 2 percent, with the experimental ones. Furthermore, the calculated vibration characteristics of 368 fuel assemblies in the case of an earthquake, such as the excited vibration mode and phase characteristics, were in agreement with the experimental ones. We concluded that the developed model of fuel assemblies was applicable to seismic analysis of a boiling water core.

Stability in boiling water reactor using fuel assemblies containing inert matrix as a fuel reload option

2016 ◽  
Vol 96 ◽  
pp. 31-35 ◽  
Author(s):  
Castillo-Duran Rogelio ◽  
Hernandez-Lopez Hector
Keyword(s):  
Boiling Water ◽  
Boiling Water Reactor ◽  
Water Reactor ◽  
Inert Matrix ◽  
Fuel Assemblies ◽  
Fuel Reload

Inspection and repair of boiling water reactor fuel assemblies / Inspektion und Reparatur von Siedewasserreaktor-Brennelementen.

Kerntechnik ◽  
1991 ◽  
Vol 56 (2) ◽  
pp. 98-100
Author(s):  
H. Borgers ◽  
R. Deleryd ◽  
T. Olsson
Keyword(s):  
Reactor Fuel ◽  
Boiling Water ◽  
Boiling Water Reactor ◽  
Water Reactor ◽  
Fuel Assemblies

Analysis of minor actinide recycling using MOX fuel assemblies in a Boiling Water Reactor

2018 ◽  
Vol 120 ◽  
pp. 8-26 ◽  
Author(s):  
Gustavo Alonso ◽  
Eduardo Martinez ◽  
J. Ramón Ramírez ◽  
Rogelio Castillo ◽  
Alejandro Castillo
Keyword(s):  
Boiling Water ◽  
Minor Actinide ◽  
Boiling Water Reactor ◽  
Water Reactor ◽  
Mox Fuel ◽  
Fuel Assemblies

Modular Boiling Water Reactor Concept

2018 ◽  
Author(s):  
Liao Yi ◽  
Wang Cong ◽  
Chen Lei
Keyword(s):  
Fuel Cycle ◽  
Natural Circulation ◽  
Boiling Water ◽  
Boiling Water Reactor ◽  
Safety Feature ◽  
Water Reactor ◽  
Fuel Cycles ◽  
Fuel Assemblies ◽  
Safety Features ◽  
Thermal Hydraulic Analysis

Modular boiling water reactor (MBWR) can be considered as a small sized economic simplified boiling water reactor (ESBWR). It has the advantage of easier fabrication, transportation and construction. In this paper, a 65MWe MBWR core was designed with natural circulation, passive safety features, high power density and an 18 months fuel cycle. The MBWR core consists of 104 fuel assemblies with 4.6 w/o U-235, the assemblies were divided into 3 batches based on the depletion level, the batches shuffled at the end of each cycle. The core converged to equilibrium after 8 fuel cycles. A steady-state equilibrium fuel cycle depletion analysis was performed over a 540 day cycle using the HELIOS and PARCS software. The control blades insertion patterns were chosen to minimize axial and radial power peaking and provide uniform burnup throughout the cycle. At the end of the equilibrium cycle, 16% of total control blade worth remained inserted and the average assembly burnup is 21.318 GWd/MTHM. Thermal hydraulic analysis was also performed to insure the core’s safety feature.

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