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Isar 2 Decommissioning Accident Halts Work After 800-Kilogram Piece Damages Reactor Pool

The operator reported the incident in the lowest regulatory tier, with the small leak contained on site.

Overview

  • An approximately 800-kilogram metal component fell during underwater dismantling inside the reactor pressure vessel, damaging the inner lining of the double-walled pool.
  • A few cubic meters of slightly radioactive water entered the cavity between the pool walls, was captured, and the tear has been sealed.
  • No injuries were reported and officials said there were no effects on the surrounding area.
  • The operator classified the event as “normal,” the lowest of three reporting categories that requires notification within five days.
  • Work at the Niederaichbach site is paused pending investigation, possibly until Christmas, with any impact on the February 2040 decommissioning target still unclear; the company reiterated that a restart is not possible.