HPC News Update – June 2022

Turbine hall taking shape

Unit 1’s turbine hall has been taking shape, with construction work completed on the lower and upper walls. The walls sit to the side of the turbine generator table and are built up in sections and are critical to supporting the erection of steelwork around the turbine hall. The building will eventually become home to the world’s largest turbine generator.

Critical generators under inspection

The first maintenance inspections have started at Avonmouth on four emergency diesel

generators (EDGs) that will provide vital back-up power to the Unit 1 reactor. The EDGs are designed to provide emergency electrical generation in the event of a total loss of power and will keep the reactor’s cooling circuits in operation. BYES is the contractual owner of the equipment, with Osprey acting as service provider for the EDGs’ installation, safe storage and transportation. The generators arrived at Avonmouth in February after being manufactured by Hyundai Heavy Industries.

MEH Alliance team moves in to electrical building . . .

The MEH Alliance team has taken over the lower second level of the electrical building, meaning the installation of 267 electrical supports, 2.9km of cable trays and eight multi-tier rack support structures can begin. The building will house key electrical equipment responsible for distributing power to the different areas of HPC, as well to the Shurton substation via transformers. Throughout the MEH Alliance’s work in the electrical building, the team will be installing instrumentation and control cabinets, switchboards, and pulling several kilometres of cables.

. . . and helps prepare for the first dome lift

Meanwhile, over by nuclear island Unit 1, the MEH Alliance has started the erection of the containment heat removal pipework (EVU) to support the delivery of the first dome lift. The installation programme will see the team install more than 60 mechanical and electrical supports and perform 48 welds along the 236m of pipework within the 237-tonne dome.

Taken from The Point June 2022

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