Several nuclear facilities in Iran have been targeted in recent days. So far, there is no evidence that radioactive substances have been released outside the facilities. If that were to happen in the future at these facilities, no measures would be needed in the Netherlands due to the large distance from Iran.
On the website of the Dutch government (external link), you can find up-to-date information about the conflict between Israel and Iran.
The map below provides an overview of the affected nuclear facilities in Iran.

Active Monitoring
The RIVM closely monitors international radiation measurement networks and maps potential spread based on available data. The RIVM is in close contact with the Nuclear Safety and Radiation Protection Authority (ANVS) and the UN United Nations (United Nations)-nuclear agency IAEA International Atomic Energy Agency (International Atomic Energy Agency) (International Atomic Energy Agency).
No Consequences for the Netherlands
The situation in Iran will not lead to radiological measures in the Netherlands due to the large distance from Iran. However, the RIVMs Radiation Incident Organization can calculate how radioactivity may spread in the atmosphere in the event of a radiation incident or nuclear accident. Therefore, the RIVM is also investigating what might happen if radioactivity is released from a nuclear reactor or other nuclear facility in Iran as a result of these attacks.
More information can also be read in the statement by Director General Grossi of IAEA (external link).