Characteristics of Water-ZrO2 Nanofluids with Different pH Utilizing Local ZrO2 Nanoparticle Prepared by Precipitation Method

2014 ◽  
Vol 896 ◽  
pp. 163-167 ◽  
Author(s):  
Dani Gustaman Syarief
Keyword(s):  
Heat Transfer ◽  
Zeta Potential ◽  
Nuclear Reactor ◽  
Nuclear Reactors ◽  
Precipitation Method ◽  
Synthesis And Characterization ◽  
Fusion Method ◽  
Two Phases ◽  
Scherrer Method

Changing water as the conventional nuclear reactor coolant with nanofluid in order to increase the efficiency of heat transfer in the nuclear reactors becomes a strong need. In this work, a study of synthesis and characterization of ZrO2 nanoparticle and water-ZrO2 nanofluid was done. The ZrO2 nanopowder was synthesized using a precipitation method from ZrOCl2.8H2O (ZOC) that was prepared from local zircon (ZrSiO4) using caustic fusion method with calcination temperature of 800°C. The ZrO2 nanoparticle contained two phases namely cubic and monoclinic with crystallite size of 12 nm measured using Debye Scherrer method. Stability of nanofluids that prepared by mixing the ZrO2 nanoparticle with water depended on pH. The nanofluids with pH less than 5 and larger than 8 were stable. Sedimentation test showed that the Water-ZrO2 nanofluid produced in this study was very stable until at least 9 days. A typical basic nanofluid has zeta potential of about-41 mV and a typical acidic one has zeta potential of +45 mV. Thermal conductivity of the nanofluids was 4-9 % larger than that of water.

Synthesis and Characterization of Al2O3 Nanoparticles and Water-Al2O3 Nanofluids for Nuclear Reactor Coolant

2015 ◽  
Vol 1123 ◽  
pp. 270-273 ◽  
Author(s):  
Dani Gustaman Syarief ◽  
Djoko Hadi Prajitno
Keyword(s):  
Thermal Conductivity ◽  
Zeta Potential ◽  
Nuclear Reactor ◽  
Sol Gel ◽  
Chelating Agent ◽  
Synthesis And Characterization ◽  
Gamma Alumina ◽  
Nuclear Coolant ◽  
Scherrer Method

A study on synthesis and characterization of Al2O3nanoparticles for water-Al2O3nanofluids as an alternative nuclear coolant has been done. The Al2O3nanoparticles were synthesized from AlCl3using sol gel method utilizing sugar as chelating agent. The Al2O3nanoparticles were mixed with water to produce nanofluids. XRD data showed that the Al2O3nanoparticles crystallize in gamma alumina with crystallite size of 5.5 nm (Debye Scherrer method). Surface area of the Al2O3nanoparticles was 90 m2/gram. Data of TEM showed that the particle size was smaller than 10 nm and the nanoparticle formed agglomerate with size of 60-100 nm. According to zeta potential data, the nanofluids were stable at pH 2.6-7.5 with zeta potential of 28-51 mV. The height of the nanofluid surface decreased about 20 % after 6 days. The thermal conductivity of the water-Al2O3nanofluids produced in this study increased about 2.4-9.7 % compared to that of water.

Exploring the Use of Alumina Nanofluid as Emergency Coolant for Nuclear Fuel Bundle

2018 ◽  
Vol 11 (2) ◽  
Author(s):  
A. S. Chinchole ◽  
Arnab Dasgupta ◽  
P. P. Kulkarni ◽  
D. K. Chandraker ◽  
A. K. Nayak
Keyword(s):  
Heat Transfer ◽  
Nuclear Fuel ◽  
Nuclear Reactor ◽  
Cooling System ◽  
Nuclear Reactors ◽  
Electrical Heating ◽  
High Dose ◽  
Potential Candidate ◽  
Alumina Nanofluid ◽  
Core Cooling

Abstract Nanofluids are suspensions of nanosized particles in any base fluid that show significant enhancement of their heat transfer properties at modest nanoparticle concentrations. Due to enhanced thermal properties at low nanoparticle concentration, it is a potential candidate for utilization in nuclear heat transfer applications. In the last decade, there have been few studies which indicate possible advantages of using nanofluids as a coolant in nuclear reactors during normal as well as accidental conditions. In continuation with these studies, the utilization of nanofluids as a viable candidate for emergency core cooling in nuclear reactors is explored in this paper by carrying out experiments in a scaled facility. The experiments carried out mainly focus on quenching behavior of a simulated nuclear fuel rod bundle by using 1% Alumina nanofluid as a coolant in emergency core cooling system (ECCS). In addition, its performance is compared with water. In the experiments, nuclear decay heat (from 1.5% to 2.6% reactor full power) is simulated through electrical heating. The present experiments show that, from heat transfer point of view, alumina nanofluids have a definite advantage over water as coolant for ECCS. Additionally, to assess the suitability of using nanofluids in reactors, their stability was investigated in radiation field. Our tests showed good stability even after very high dose of radiation, indicating the feasibility of their possible use in nuclear reactor heat transfer systems.

Synthesis and characterization of Eu[sup 3+]:YAG nanopowder by precipitation method

2013 ◽  
Author(s):  
D. Balaji ◽  
D. Thangaraju ◽  
A. Durairajan ◽  
S. Moorthy Babu
Keyword(s):  
Precipitation Method ◽  
Synthesis And Characterization

Synthesis and Characterization of Cerium Oxide (CeO2) Nanoparticles

2009 ◽  
Vol 609 ◽  
pp. 189-194 ◽  
Author(s):  
C. Benmouhoub ◽  
A. Kadri ◽  
N. Benbrahim ◽  
S. Hadji
Keyword(s):  
Crystallite Size ◽  
Cerium Oxide ◽  
Ceo2 Nanoparticles ◽  
Precipitation Method ◽  
Synthesis And Characterization

Nanoparticles of cerium oxide (CeO2) are synthesized with cerium (III) nitrates (Ce(NO3)3, 6H2O) by precipitation method in ammonium hydroxyl solution (NH4OH). The influence of several parameters such as nature of the solvent, synthesizing temperature and the calcination on the crystallite size is studied by XRD, TEM and BET methods. The results show that both calcinations and synthesizing temperature affect the particles size. Also, the nature of solvent has a great effect on the morphology of CeO2 nanoparticles.

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