Investigation of free level fluctuations in a simulated model of a sodium cooled Fast Breeder Reactor using pulsating conductance monitoring device

Aggarwal, Piyush; Pandey, G.K.; Malathi, N.; Arun, A. D.; Ananthanarayanan, R.; Banerjee, Indranil; Sahoo, Prativa; Padmakumar, G.; Muthialu, Nagarajan

doi:10.1016/j.anucene.2011.11.020

Cited by 11 publications

(4 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on highly satisfactory performance of pulsating sensor-based conductivity monitoring instrument in many physical and physico-chemical applications [ 18 – 24 ] we deployed this conductivity monitoring technique to capture real time radiation induced chemical changes in a chemical dosimeter. In order to demonstrate simplicity in instrumentation for real time measurement of radiation dose saturated chloroform in water has been selected as chemical dosimeter in the present study.…”

Section: Resultsmentioning

confidence: 99%

A novel approach towards development of real time chemical dosimetry using pulsating sensor-based instrumentation

Malathi

Sahoo

Praveen

et al. 2013

J Radioanal Nucl Chem

Self Cite

View full text Add to dashboard Cite

The paper presents an innovative approach towards development of real time dosimetry using a chemical dosimeter for measurement of absorbed radiation dose in the range between 1 and 400 Gy. Saturated chloroform solution in water, a well known chemical dosimeter, is used to demonstrate the concept of online measurement of radiation dose. The measurement approach involves online monitoring of increase in conductivity of saturated chloroform solution due to progressive build up of traces of highly conducting HCl during exposure to gamma irradiation. A high performance pulsating sensor-based conductivity monitoring instrument has been used to monitor such real time change in conductivity of solution. A relation between conductivity shift and radiation dose has been established using radiochemical yield value (G value) of HCl. The G value of HCl in saturated chloroform dosimeter has been determined using laboratory developed pulsating sensorbased devices. In this connection dose rate of Co-60 gamma chamber was determined using Fricke dosimeter following a simple potentiometric measurement approach developed inhouse besides conventional spectrophotometry. Results obtained from both measurement approaches agreed well. Complete instrumentation package has also been developed to measure real time radiation dose. The proposed real time radiation dosimeter is successfully tested in several measurement campaigns in order to assure its performance prior to its deployment in field.

show abstract

Section: Resultsmentioning

confidence: 99%

A novel approach towards development of real time chemical dosimetry using pulsating sensor-based instrumentation

Malathi

Sahoo

Praveen

et al. 2013

J Radioanal Nucl Chem

Self Cite

View full text Add to dashboard Cite

show abstract

“…Accordingly, the void sensing probe is designed in such a way that the sensor is immersed in the static pool. Since conductance-based void detection, in general, gives good results in such environments (Aggarwal et al, 2012), electrodes of different configurations are designed and optimized. The various configurations that were experimentally analyzed were meshtype electrodes, ring-type electrodes, and wire-type electrodes.…”

Section: Sensing Probe Constructionmentioning

confidence: 99%

Numerical and Experimental Investigation of Air-Water System to Simulate Bubble Dynamics in Liquid Sodium Pool

Pradeep

Sharma

Rajiniganth

et al. 2019

Braz. J. Chem. Eng.

Self Cite

View full text Add to dashboard Cite

The dynamics of rising bubbles in a liquid sodium pool plays a significant role in the estimation of the radiological source term during anticipated transients and normal operation of a fast reactor. Sodium is chemically reactive with air and water. Therefore, carrying out experiments using sodium on a reactor scale level requires extra precautions. We report an in-house experimental technique to depict the bubble dynamics along with numerical support to establish similarity behavior between water and liquid sodium, to reduce the number of experiments in sodium systems for in-depth knowledge of bubble dynamics in the case of the fast breeder reactor. In the present work, 3-D bubble dynamics is studied in the OpenFOAM platform and the validated numerical model is used to study bubble dynamics in sodium to establish similitude between the water and sodium systems. The bubble aspect ratio of 0.9 cm diameter bubbles in the sodium system is found to be in close agreement with that of 0.5 cm bubbles in the water system. Experimental and numerical findings suggest similarity of the aspect ratio between water and scaled-up sodium systems. The similarity criteria established between water and sodium are found to be very useful in conducting water-based experiments to study bubble dynamics in sodium systems.

show abstract

“…Furthermore, these sensors based on conventional measurement methods require elaborate instrumentation circuits such as an excitation coil with a constant current and frequency, a pickup coil in a differential configuration, bridge circuit, pre-amplification, post-amplification, low pass filter, analog to digital conversion and digital circuitry [12][13][14][15][16][17][18][19][20]. In the Indira Gandhi Centre for Atomic Research (IGCAR), a new class of sensors called quasi-digital sensors (pulsating sensors) are being developed and deployed for many physicochemical applications; the output of these sensors is a train of rectangular transistor-transistor logic (TTL) pulses of 5 V d.c, [21][22][23][24][25][26]. These sensors overcome the drawbacks of conventional methods.…”

Section: Introductionmentioning

confidence: 99%

Deployment of an inductance-based quasi-digital sensor to detect metallic wear debris in lubricant oil of rotating machinery

Sanga

Srinivasan

Sivaramakrishna

et al. 2018

Meas. Sci. Technol.

View full text Add to dashboard Cite

In rotating machinery due to continuous rotational induced wear and tear, metallic debris will be produced and mixes with the in-service lubricant oil over the course of time. This debris gives the sign of potential machine failure due to the aging of critical parts like gears and bearings. The size and type of wear debris has a direct relationship with the degree of wear in the machine and gives information about the healthiness of equipment. This article presents an inductive quasi-digital sensor to detect the metallic debris, its type; size in the lubrication oil of rotating machinery. A microcontroller based low cost, low power, high resolution and high precise instrument with alarm indication and LCD is developed to detect ferrous debris of sizes from 30 µm and non-ferrous debris of 50 µm. It is thoroughly tested and calibrated with ferrous, non-ferrous debris of different sizes in the air environment. Finally, an experiment is conducted to check the performance of the instrument by circulating lubricant oil containing ferrous, non-ferrous debris through the sensor.

show abstract

Investigation of free level fluctuations in a simulated model of a sodium cooled Fast Breeder Reactor using pulsating conductance monitoring device

Cited by 11 publications

References 8 publications

A novel approach towards development of real time chemical dosimetry using pulsating sensor-based instrumentation

A novel approach towards development of real time chemical dosimetry using pulsating sensor-based instrumentation

Numerical and Experimental Investigation of Air-Water System to Simulate Bubble Dynamics in Liquid Sodium Pool

Deployment of an inductance-based quasi-digital sensor to detect metallic wear debris in lubricant oil of rotating machinery

Contact Info

Product

Resources

About