Structural improvements in new sodium pump designs

The positive experience of operating the BOR-60, BN-350 and BN-600 pumps was made use of when the sodium pumps for the prospective advanced fast reactors BN-800, BN-1600M, BMN-170, BN-600M were designed. Some items determining the life-time and reliability of the pumps were designed to be similar to the operating pumps, most importantly 

At present several problems still await solution. They are the following  

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