Status of the small modular fluidized bed light water nuclear reactor concept

Sefidvash, Farhang

doi:10.1016/s0029-5493(96)01276-9

Cited by 22 publications

(16 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…His initial design was a modular light water reactor fluidized bed. [9] However, Sefidesh's initial design was modified from a light water reactor 6 to a gas cooled reactor. This was done to avoid the complications of multi-phase phenomenon at high operating temperatures.…”

Section: A Pebble Bed Modular Reactormentioning

confidence: 99%

Computational Analysis of Fluid Flow in Pebble Bed Modular Reactor Using Different Turbulence Models

Gandhir

Hassan

2010

ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting: Volume 1, Symposia – Parts A, B, and C

View full text Add to dashboard Cite

A steady state computational study was done to obtain the pressure drop estimation in different packed bed geometries, and describe the fluid flow characteristics for such complex structures. Two out of the three Bravais lattices were analyzed, namely, simple cubic (symmetric) and body centered cubic (staggered). STARCCM+ commercial CFD software from CD-ADAPCO was used to simulate the flow. To account for turbulence effects standard k-epsilon and realizable k-epsilon models were used. Various cases were analyzed with Modified Reynolds number ranging from 10,000 to 50,000. Each model showed different results as far as the velocity and flow structure is concerned. However, for each case the flow structure showed similar features such as vortex formation downstream and between pebbles due to complex flow separation [1]. The pressure drop obtained from each model was found to be in reasonable agreement with the existing data.

show abstract

Section: A Pebble Bed Modular Reactormentioning

confidence: 99%

Computational Analysis of Fluid Flow in Pebble Bed Modular Reactor Using Different Turbulence Models

Gandhir

Hassan

2010

ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting: Volume 1, Symposia – Parts A, B, and C

View full text Add to dashboard Cite

show abstract

“…The fixed bed nuclear reactor (FBNR) is being developed under the IAEA Coordinated Research Project (CRP) on Small Reactors without On‐site Refueling . The FBNR operates at the 70 MW el capacity, based on the conventional PWR technology, but uses spherical fuel elements, where TRISO particles will be imbedded with fuel kernels in the center.…”

Section: Introductionmentioning

confidence: 99%

Reactivity and kinetic parameter evolutions for the core height and boron concentration of the fixed bed nuclear reactor

et al. 2016

Self Cite

View full text Add to dashboard Cite

SUMMARY This article focuses on calculation of reactivity and kinetic parameters in different states (different core heights and boron concentrations in the coolant water) of the fixed bed nuclear reactor (FBNR). The numerical calculations are performed with the SRAC code. Uranium dioxide (UO2) with 235U enrichment grade of 5% is used as spherical fuel pellets in the TRISO fuel type. The core height is changed by a core height level limiter. The main results of this study can be summarized as follows: The effective neutron multiplication coefficient is varied with the core height and boron concentration in the coolant water. When there is no‐boron in the coolant water and the core height is over 120 cm, the reactor control can be carried out by the movement of a core height level limiter, without the fine control rods in the core center; but when there is a boron concentration, the reactor may be controlled by the level limiter at the lower core heights. The kinetic parameters (the prompt‐neutron lifetime and effective delayed neutron fraction) of the reactor also are changed to the reactor core height and to the boron concentration in the coolant water. Copyright © 2016 John Wiley & Sons, Ltd.

show abstract

“…UC Berkeley developed a liquid salt cooled, high temperature reactor conceptual design, named Pebble Bed Advanced High Temperature Reactor (PB-AHTR) (Lim and Peterson, 2009), to achieve a higher core power density of 20-30 MWth/m 3 , compared to the 4.8-6.0 MWth/m 3 typical of modular helium reactors (MHRs) (Bardet et al, 2008). To apply the PBR design features in most experienced pressurized water reactor (PWR), Sefidvash (1996) firstly presented the concept of small modular fluidized bed light water reactor, and then the concept of fixed bed light water reactor (Sefidvash, 2004). Pacific Northwest National Laboratory (PNNL) (Senor et al, 2007) also has proposed its Atoms For Peace Reactor (AFPR-100) concept for both boiling and pressurized types water reactor.…”

Section: Introductionmentioning

confidence: 99%