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Thermoelectric power generation in the core of a nuclear reactor

Journal Article · · Energy Conversion and Management
 [1];  [1];  [2];  [3];  [3];  [3];  [4];  [2];  [1]
  1. University of Notre Dame, IN (United States)
  2. Massachusetts Institute of Technology (MIT), Cambridge, MA (United States)
  3. Boise State University, ID (United States); Center for Advanced Energy Studies, Idaho Falls, ID (United States)
  4. Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Thermoelectric energy converters offer a promising solution to generate electrical power using heat in the nuclear reactor core. Despite significant improvements in thermoelectric efficiency of nanostructured materials, the performance of these advanced materials has yet to be demonstrated in the harsh radiation environment of a reactor core. Herein, we demonstrate a thermoelectric generator (TEG) made from nanostructured bulk half-Heusler (HH) materials generating stable electrical power density > 1140 W/m2 after 30 days in the MIT Nuclear Research Reactor under an unprecedented fast-neutron (>1 MeV) fluence of 1.5 × 1020 n/cm2. Despite an initial degradation due to irradiation damage when operating under relatively low temperatures, our TEG showed a 20-fold increase in power output when operating under high temperature due to in-situ annealing and resulting thermoelectric property recovery. First-principles modeling indicates that a chemically disordered metallic phase was formed under irradiation at lower temperatures, resulting in a drastic degradation in thermoelectric properties, while at sufficiently high temperatures the system returned to the initial chemically ordered HH phase and the thermoelectric properties recovered. Transmission electron microscopy and electron diffraction demonstrated that the chemically disordered phase was formed upon ion irradiation, confirming the prediction from first-principles simulations. Furthermore, the results suggest that with proper control over the TEG operating temperatures, the nanostructured bulk TEGs could produce stable electrical power and operate indefinitely in the core of a nuclear reactor.
Research Organization:
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
AC07-05ID14517; NE0008812
OSTI ID:
2202482
Report Number(s):
INL/JOU--22-67241-Rev000
Journal Information:
Energy Conversion and Management, Journal Name: Energy Conversion and Management Journal Issue: - Vol. 268; ISSN 0196-8904
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (38)

Beneficial Contribution of Alloy Disorder to Electron and Phonon Transport in Half-Heusler Thermoelectric Materials journal April 2013
Enhancement in Thermoelectric Figure-Of-Merit of an N-Type Half-Heusler Compound by the Nanocomposite Approach journal May 2011
Effect of Hf Concentration on Thermoelectric Properties of Nanostructured N-Type Half-Heusler Materials Hf x Zr 1-x NiSn 0.99 Sb 0.01 journal May 2013
Irradiation effects on thermoelectric materials journal January 1962
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
An updated version of wannier90: A tool for obtaining maximally-localised Wannier functions journal August 2014
Evolution of nuclear fission reactors: Third generation and beyond journal September 2010
High-temperature and high-power-density nanostructured thermoelectric generator for automotive waste heat recovery journal November 2015
Design and optimization of automotive thermoelectric generators for maximum fuel efficiency improvement journal August 2016
Thermoelectric generators: A review of applications journal May 2017
Influence of fast neutron and gamma irradiation on the thermoelectric properties of n-type and p-type SiGe alloy journal January 2020
Recent progress in half-Heusler thermoelectric materials journal April 2016
Recent progress of half-Heusler for moderate temperature thermoelectric applications journal October 2013
Enhancement of thermoelectric figure-of-merit at low temperatures by titanium substitution for hafnium in n-type half-Heuslers Hf0.75−xTixZr0.25NiSn0.99Sb0.01 journal January 2013
Engineering half-Heusler thermoelectric materials using Zintl chemistry journal May 2016
Realizing high figure of merit in heavy-band p-type half-Heusler thermoelectric materials journal September 2015
Establishing the carrier scattering phase diagram for ZrNiSn-based half-Heusler thermoelectric materials journal June 2020
Breaking thermoelectric performance limits journal August 2021
Thermoelectric performance of a metastable thin-film Heusler alloy journal November 2019
Demonstration of a phonon-glass electron-crystal strategy in (Hf,Zr)NiSn half-Heusler thermoelectric materials by alloying journal January 2015
A prospective on energy and environmental science journal January 2019
Realization of higher thermoelectric performance by dynamic doping of copper in n-type PbTe journal January 2019
Realizing record high performance in n-type Bi2Te3-based thermoelectric materials journal January 2020
Unveiling the phonon scattering mechanisms in half-Heusler thermoelectric compounds journal January 2020
Extraordinary role of Zn in enhancing thermoelectric performance of Ga-doped n-type PbTe journal January 2022
Ultrahigh carrier mobility contributes to remarkably enhanced thermoelectric performance in n-type PbSe journal January 2022
A climbing image nudged elastic band method for finding saddle points and minimum energy paths journal December 2000
Effects of partial substitution of Ni by Pd on the thermoelectric properties of ZrNiSn-based half-Heusler compounds journal December 2001
Strain field fluctuation effects on lattice thermal conductivity of ZrNiSn-based thermoelectric compounds journal August 2004
Effect of Ti substitution on the thermoelectric properties of (Zr,Hf)NiSn half-Heusler compounds journal February 2005
A robust high sensitivity scanning thermal probe for simultaneous microscale thermal and thermoelectric property mapping journal September 2021
Achieving high power factor and output power density in p-type half-Heuslers Nb 1-x Ti x FeSb journal November 2016
Changes produced in thermoelectric materials by thermal-neutron irradiation journal August 1967
Inhomogeneous Electron Gas journal November 1964
Self-Consistent Equations Including Exchange and Correlation Effects journal November 1965
Projector augmented-wave method journal December 1994
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Generalized Gradient Approximation Made Simple journal October 1996

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