According to the information received from Eskom
(1)(a) and (b)
The incident is not related to the steam pipe / or steam generator as it occurred on the Electric Generator that is coupled to the steam turbine centreline through a Turbo Gen rotor. The Medupi Generators original equipment manufacturer (OEM) is General Electric (GE).
(2)
The 8th of August 2021 Medupi unit 4 generator failure incident is still under investigation, however, following the preliminary investigation, it appears that while performing the purging of hydrogen activity, air was introduced into the generator at a point where hydrogen was still present at sufficient quantities to create an explosive mixture. This is not related to the steam pipes or to issues with previous maintenance activities.
(3)(a)(i)
The final damage assessment will only be quantified once the all-turbine cylinders and the generator are fully stripped. The process underway is making the area safe to commence with stripping and internal inspections. The cost of repairs will be established once the contracts are placed as per detailed scope of work following damage assessments.
3(a)(ii)
The repairs will depend on the extent of the damage and the long lead components to be replaced. It is safe to say that the repair duration will be in excess of one year.
3(b)
Eskom has insurance cover for all its assets.