# Temelín Nuclear Power Plant operations

> Live situation record from CLSTR: https://clstr.news/situations/temeln-nuclear-power-plant-operations
> Updated: 2026-09-29T09:22:00.000Z. Sources: 13. Developments: 2.

The Temelín Nuclear Power Plant in the Czech Republic has undergone recent technical and operational developments. In mid-September 2026, the facility’s second reactor block experienced an unplanned shutdown and disconnection from the grid caused by a faulty electronic card in a non-nuclear control system. The operator, CEZ, replaced the component and reconnected the reactor to the grid, with power production expected to return to full capacity shortly after.

In late September 2026, reports indicated that the station has been expanding its fresh nuclear fuel storage capacity to enhance energy security. Through a process involving the modification of containers and the installation of a specialized 18-ton storage grid by Škoda JS, the plant has added 102 new storage positions. This expansion increases the facility’s fuel reserves from over two years to more than three years of operational capacity.

## Timeline

### 2026-09-29: Temelín Nuclear Power Station expands fuel storage capacity

Temelín Nuclear Power Station is expanding its fuel storage capacity to over three years of operation, enhancing Czech energy security through new storage positions and specialized equipment from Škoda JS.

3 sources. https://clstr.news/cluster/temeln-nuclear-power-station-expands-fuel-storage-capacity

### 2026-09-16: Temelín Nuclear Power Plant reactor block 2 undergoes unplanned shutdown

The second reactor block at the Czech Temelín Nuclear Power Plant was temporarily shut down due to a non-nuclear control system malfunction involving a faulty electronic card.

10 sources. https://clstr.news/cluster/temeln-nuclear-power-station-reactor-undergoes-unplanned-shutdown

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Cite as: Temelín Nuclear Power Plant operations. CLSTR, https://clstr.news/situations/temeln-nuclear-power-plant-operations