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KWU 210MW Set, ISKAMATIC Control system, speed sensor disc packing cover dislocated and widen. But the speed measurement is normal. the permanent magnets in the disc din't damaged. <i>[moderator's note: I think he means aren't damaged]</i> two of the sensors damaged when rolling started. This problem was identified at next shutdown. Now replacing new disc is not possible. How do i fix the damaged part into the main disc.
