Russia to use highly enriched Ni-63 for atomic batteries

21 December 2018

Russia’s Mining and Chemical Combine (MCC) announced on 18 December that it has achieved a world first in the conversion of highly enriched Nickel-63 (Ni-63) for integration into an atomic battery with a lifetime of 50 years.

MCC (part of state nuclear corporation Rosatom) has completed the next stage in the process of creating a beta-voltaic power source using Ni-63 by converting a working gas enriched for Ni-63 to a form suitable for drawing on the semiconductor converter. The delivery of the appropriate components for the deposition of Ni-63 and the final assembly of a prototype atomic battery is now imminent. The converter is based on a new design, which qualitatively increases the efficiency of all components.

MCC is acting as a system integrator for this project, implementing a set of breakthrough technologies. MCC organised work in two directions: obtaining the highly enriched Ni-63 isotope (which involved more than ten stages) and creating a special semiconductor converter (more than ten stages). To implement the project, a number of technologies were redeveloped, in particular: the production of working gas from radioactive nickel-63 for enrichment in centrifuges, the production of  reagents for the production of working gas, and the conversion of enriched nickel-63 gas to solid compounds for deposition on a semiconductor. The scientific and technical solutions involved in the isotope production have no analogues and will be protected by patents in Russia and abroad, MCC said.

The project has resulted in to the revival of a number of industries. The Electrochemical Plant (ECP in Zelenogorsk, Krasnoyarsk Territory) put into operation an appropriate cascade of centrifuges which had previously shut down by fuel company Tvel (part of Rosatom) for economic reasons.

Power sources based on highly enriched Ni-63 along with the new converter design have made possible the design of a new-generation devices in the field of cybernetics and AI, where miniaturised sources of this type will be able to imitate the activities of brain neurons, MCC said. They should not be considered as an alternative to lithium batteries. This is a new type of device  that will become the basis for a new architecture of electronic equipment.

Compact “atomic batteries” with a lifetime of up to 50 years will find a use in instrument-making and radio electronics (miniaturisation and reduction of energy consumption), and will be in great demand in devices and systems where replacement of power sources is difficult, costly or unsafe, said Tvel. Potential applications are space technology, medicine (current sources for cardiac implants and other biostimulants), telecommunications equipment, military-industrial complex products, industrial and infrastructure facilities.

Tvel explained that the nickel-63 was made by irradiating stable nickel-62 in the IVV-2M research reactor at the Institute of Reactor Materials (Sverdlovsk branch of the NN Dollezhal Research & Development Institute of Power Engineering (Nikiet). The VG Khlopin Radium Institute in St Petersburg undertook radiochemical purification of the irradiated material and synthesised the working gas, which was then at ECP.

In 2019, specialists at ECP, as part of their research and development, plan to achieve an enrichment Ni-63 isotope to a level of more than 80%. The initial nickel-62 for this is currently being irradiated in an RBMK-1000 power reactor at the Leningrad nuclear plant.

 



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