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Belzona® Repairs And Protects Pump Volute In Nuclear Plant



Power (POWR)



Centrifugal Pumps (CEP)


Customer Location:

Nuclear Power Station, France


Application Date:



Application Situation:

This large concrete volute (120 m²) is a part of a big cooling pump from the secondary circuit in a nuclear power plant. The pump is moving 22m3/seconds of cooling water. 



After several years in service, the concrete started to show signs of erosion, showing regular wear and cracking. Repairs were needed, otherwise this wear would have accelerated and risked causing damage to heat exchangers.   



Belzona 4111 (Magma Quartz)

Belzona 1321 (Ceramic S-Metal)





Application Method:

The application was carried out in accordance with Belzona Know-How System Leaflet CEP-03. Belzona 4111 and Belzona 1321 were used to repair and protect the walls. 


Belzona Facts:

There was no real alternative other than rebuilding with concrete, leaving it prone to the same damage. The repair of the two volutes was done in full respect of the scheduled shutdown of the plant, so without any consequences for the production activity. The pump volute is inspected annually, this was done most recently in 2017 and still found to be in an excellent condition. 


Photographs Description

1. Surface preparation.

2. Application of Belzona 4111 in progress to rebuild the concrete wall.

3. Final coat of Belzona 1321.

4. Finished application.

Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


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