Experimental investigation of pebble flow dynamics using radioactive particle tracking technique in a scaled-down Pebble Bed Modular Reactor (PBMR)

Khane, Vaibhav; Said, Ibrahim A.; Al‐Dahhan, Muthanna H.

doi:10.1016/j.nucengdes.2016.03.031

Cited by 27 publications

(19 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…were studied in a scaled down test reactor by using a non-invasive radioactive particle tracking (RPT) technique (Khane et al, 2016a). They used a Cobalt-60 based tracer to mimic pebbles in terms of shape, size, and density.…”

Section: Pebble Flowmentioning

confidence: 99%

See 1 more Smart Citation

A review of pebble flow study for pebble bed high temperature gas-cooled reactor

Jiang

Yang

et al. 2019

Exp. Comput. Multiph. Flow

View full text Add to dashboard Cite

The pebble bed high temperature gas-cooled reactor is a promising generation-IV reactor, which uses large fuel pebbles and helium gas as coolant. The pebble bed flow is a fundamental issue for both academic investigation and engineering application, e.g., reactor core design and safety analysis. This work performed a review of recent progress on pebble flow study, focusing on the important issues like pebble flow, gas phase hydrodynamics, and inter-phase heat transfer (thermal hydraulics). Our group's researches on pebble flow have also been reviewed through the aspects of phenomenological observation and measurement, voidage distribution, geometric and parameter optimization, pebble flow mechanisms, flow regime categorization, and fundamentals of modelings of pebble flow and radiation. Finally, the major problems or possible directions of research are concluded which would be some of our focuses on the pebble bed flow study.

show abstract

Section: Pebble Flowmentioning

confidence: 99%

“…Three-dimensional tracer trajectories obtained using RPT(Khane et al, 2016a; reproduced with permission © Elsevier B.V. 2016).…”

mentioning

confidence: 99%

A review of pebble flow study for pebble bed high temperature gas-cooled reactor

Jiang

Yang

et al. 2019

Exp. Comput. Multiph. Flow

View full text Add to dashboard Cite

show abstract

“…A sample of the counts response of top and bottom collimated detectors is shown in Figure 8. The forward problem of finding instantaneous position of particle based on intensities received at the detectors is solved by performing calibration experiments (Khane et al 2016). RPT calibration experiments, which are performed prior to actual RPT experiments, are carried out at the same operating conditions as that of actual experiment to mimic the radiation attenuation in the system (Khane 2014).…”

Section: Description Of the Experimental Workmentioning

confidence: 99%

“…It also helps in the efficient utilization of fissile material due to which high burn-up can be achieved. Gaseous coolant, usually helium, moves from the top of the bed through the voids formed between the solids and removes fission heat generated from the heat source (Chapin et al 2004;Khane et al 2012;Khane 2014;Khane et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the overall residence time of pebbles in a pebble bed reactor (PBR) using radioactive pebble

Khane

Taha

2016

Progress in Nuclear Energy

Self Cite

View full text Add to dashboard Cite

The granular flow of pebbles in a pebble bed reactor (PBR) under the influence of gravity is a dense granular flow with long-lasting frictional contacts. The basic governing physics is not fully understood and hence the dynamic core of a PBR and non-idealities associated with pebbles flow inside the reactor core are of non-trivial significance from the point of view of safety analyses, licensing, and thermal hydraulics. In the current study, overall and zonal pebbles residence time investigation is carried out by implementing noninvasive radioisotope-based flow visualization measurement techniques such as residence time distribution (RTD) and radioactive particle tracking (RPT). The characteristics of overall pebble residence time/transient number, zonal residence time, and the z-component of average zonal velocities at different initial seeding positions of a tracer particle have been summarized. It is found that the overall pebbles residence time/transient number increases (the z-component of average zonal velocities decreases) from the center towards the reactor wall. Also, pebbles' zonal residence time results (the whole core is divided into three zones) which provide more insight and understanding about PBR core dynamics have been reported. The benchmark data provided could be used for assessment of commercial/in-house computational methodologies related to granular flow investigations.

show abstract

“…This technique is called radioactive particle tracking (RPT), which was firstly introduced and implemented at Australian Atomic Energy Commission in 1973 [5]. Shehata [6] from NCSU and Khane et al [7] from Missouri S&T also adopted RPT in their research. Shehata used three collimated detectors while Khane et al used as much as sixteen noncollimated detectors to track one pebble.…”

Section: Introductionmentioning

confidence: 99%

Research on the Computed Tomography Pebble Flow Detecting System for HTR-PM

Wan¹,

Liu²,

Miao³

et al. 2017

Science and Technology of Nuclear Installations

View full text Add to dashboard Cite

Pebble dynamics is important for the safe operation of pebble-bed high temperature gas-cooled reactors and is a complicated problem of great concern. To investigate it more authentically, a computed tomography pebble flow detecting (CT-PFD) system has been constructed, in which a three-dimensional model is simulated according to the ratio of 1 : 5 with the core of HTR-PM. A multislice helical CT is utilized to acquire the reconstructed cross-sectional images of simulated pebbles, among which special tracer pebbles are designed to indicate pebble flow. Tracer pebbles can be recognized from many other background pebbles because of their heavy kernels that can be resolved in CT images. The detecting principle and design parameters of the system were demonstrated by a verification experiment on an existing CT system in this paper. Algorithms to automatically locate the three-dimensional coordinates of tracer pebbles and to rebuild the trajectory of each tracer pebble were presented and verified. The proposed pebble-detecting and tracking technique described in this paper will be implemented in the near future.

show abstract

Experimental investigation of pebble flow dynamics using radioactive particle tracking technique in a scaled-down Pebble Bed Modular Reactor (PBMR)

Cited by 27 publications

References 18 publications

A review of pebble flow study for pebble bed high temperature gas-cooled reactor

A review of pebble flow study for pebble bed high temperature gas-cooled reactor

Experimental investigation of the overall residence time of pebbles in a pebble bed reactor (PBR) using radioactive pebble

Research on the Computed Tomography Pebble Flow Detecting System for HTR-PM

Contact Info

Product

Resources

About