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Lithium-7

PJSC NCCP is the Russian manufacturer of Lithium-7 (with Li-7 isotope fraction of total mass not less than 99,95%). This product is only manufactured in the form of Lithium-7 hydroxide monohydrate.

Lithium-7

This material is used in nuclear power engineering as an additive in PWR reactor primary coolant for maintaining water chemistry, in manufacture of chemical reagents for nuclear power engineering, and as a basic component for preparation of nuclear grade ion-exchange membranes which are used in PWR coolant water treatment facilities.

Lithium-7 hydroxide monohydrate is produced by electrolysis of lithium chloride water solutions using mercury solutions. After electrolysis, Li-7 hydroxide monohydrate solutions undergo further operations: purification, crystallization, centrifugation, drying, sieving and magnetic separation. The resulting product is in the form of white crystals.

Li-7 hydroxide monohydrate produced by NCCP accounts for over 70% of Li-7 world consumption (by isotopic composition). Equipment modernization carried out in 2012-2013 will make it possible to double the volume of output.

Lithium-7 hydroxide monohydrate with Lithium-7 atomic fraction > 99,99% of total lithium isotopes (Li-7 99,99%)

Possible product applications

Lithium-7 hydroxide monohydrate with Lithium-7 atomic fraction > 99,99% of total lithium isotopes is used as component of fluoride coolant in molten-salt reactors (MSR) in neutron capture, and in PWR cooling system. 

Specific features

Reduction of parasitic neutron capture in power reactors PWR is one of the tools to increase efficiency of NPP operation, which manifests itself as the increase of reactor reactivity, reduction of fuel enrichment, saving of the fuel component.  Accordingly, the higher Li-7 purity, the less effective it is in absorption of neutrons, thus hindering tritium generation in neutron capture.

Characteristics (typical specifications):

Packaging and shelf life

Lithium-7 hydroxide monohydrate with Lithium-7 atomic fraction > 99,99% of total lithium isotopes is packed in heat-sealed double polyethylene bags placed in the protective bag, which is in advance inserted in the tare.  Polyethylene drum V = 48 dm3 or any other container specified by the contract and agreed by the customer is used as the tare. Guaranteed storage time is 5 years from the date of product manufacture.