Temelín NPP – Replacement of ESW Piping for Cooling of AC Units and Other Loads

The purpose of the project, implemented for ČEZ, a.s., is to properly ensure the supply of essential service water (ESW) to the air conditioning (AC) units and other loads on HVB1 and HVB2 of the Temelín NPP and guarantee the removal of heat from selected loads, prevention of degradation of the used material and corrosion contamination.

The goal is to increase the technical life and passage of pipeline routes of the VF system, to reduce the risk of corrosion, the deposition of corrosion products and the occurrence of leaks on the routes and components of the VF system. The project will be implemented in 10 stages between 2021 and 2027.

I&C Energo a.s. will prepare the documentation part in the scope of the replacement of routes, including preparation of Supporting Documentation of strength, life durability and seismic resistance according to the methodology ÚAM 5447/14 and according to NTD A.S.I. Section III

I&C Energo a.s. will carry out pre-assembly work on part of the pipeline routes to such an extent to allow their transport to the main production unit and assembly on site into a complete piping unit and then implementation of all dismantling and assembly work consisting in the replacement of selected pipeline routes and their components made of stainless steel (valves, pressure hoses, measuring diaphragms, throttling diaphragms)

This involves the replacement of 4,600 m of pipes with a nominal diameter of DN 25 to DN 200 and 1,900 piping parts/fittings (T-pieces, elbows, reducers, flanges, etc.). The estimated total number of welds is 5900.