The web search results mention '10 microsieverts' in the context of natural radiation levels in Iran, but this specific reading attributed to 'Florian Grose' is not mentioned in any of the provided evidence. The evidence only confirms that 10 microsieverts is a mentioned natural radiation level in one source.

The claim specifies a date ('As of 2026') and precise figures (600+ reactors, less than a third closed, 20 fully decommissioned). While the web search results provide data points related to 2026 and reactor shutdowns, they do not confirm the specific ratio (less than a third) or the exact number (20 fully decommissioned) against a total of 600+ reactors.

Two web search results discuss the high cost of decommissioning, but none of the provided evidence explicitly states that decommissioning a single reactor can cost *up to* $2 billion. The evidence suggests costs are significant but does not confirm this specific figure.

One web search result specifically states that 'Radioactive water used during operations has seeped into cracks in the plaster, spreading contamination through the walls.' While general information about water seepage and contamination is present in other sources, this specific detail about radioactive water seeping into plaster cracks at Lubmin is only found once.

The claim specifies 'Only two of the 31 countries' and 'permanent underground storage facilities.' While the evidence mentions the topic of waste storage, none of the provided web search results or Wikipedia entries contain the specific statistics (31 countries, only two building facilities) to verify this claim.

The evidence confirms the fall of the Berlin Wall in 1989 and its historical context regarding West Berlin, but none of the provided sources link this event directly to West German inspectors assessing the Lubmin plant or causing its reactor shutdowns.