The electrical support is meant for the purpose of supporting the repository infrastructure. It works on the basis of certain guidelines and provides a reliable electric support for construction and operation of all surface facilities and subsurface facilities.
With the advancement of science and technology, the electrical system has also seen a lot of advancements with the passage of time. The one that is meant for the emergency power system equipment will be seismically designed for the 1000-year earthquake.
The electrical support system includes the following subsystems:
- Lighting: Maintain highly reliable and adequate lighting for all areas so that the infrastructure is not harmed in any way.
- Grounding: Protect personnel from electric shock hazards, Protect equipment from excessive voltages, and more.
- Lightning protection: Provide a designated low resistance path to the site grounding system.
- Cathodic protection: Control external corrosion on the metallic pipes, tanks and structures buried in, or in contact with the ground. And the system makes sure that all these things are done in accordance with the requirements of National Association of Corrosion Engineers (NACE) Standard RPOl69-2002.
- Heat tracing: Provide freeze protection for liquid filled piping, instrument sensing lines, and tanks that are susceptible to freezing. The system makes sure that all these things are again done as per the requirements of IEEE Std. 515-1997 and NFPA 70-2002.
- Cable raceway (including underground ducts): Provide a highly reliable cable raceway system.
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