Israeli Strike Targets Iran’s Arak Heavy Water Reactor
Daniel JusticeShare
On June 18, 2025, Iranian state television reported that Israel conducted a military strike on the Arak heavy water reactor, a key nuclear facility located approximately 250 kilometers southwest of Tehran. The attack marks a significant escalation in the ongoing conflict between Israel and Iran, which has seen intensified Israeli airstrikes on Iranian nuclear and military infrastructure in recent days.
The Arak reactor, also known as the IR-40, is a heavy water research reactor designed to produce isotopes for medical and industrial purposes. Under the 2015 Joint Comprehensive Plan of Action (JCPOA), Iran agreed to modify the reactor to limit its potential to produce weapons-grade plutonium. As part of this agreement, the reactor’s core vessel was removed and filled with concrete, rendering it inoperable for plutonium production, according to International Atomic Energy Agency (IAEA) reports. The facility has been a point of international scrutiny due to its historical role in Iran’s nuclear program.
According to Iranian authorities, the Arak reactor was evacuated prior to the strike, and there was “no radiation danger whatsoever.” However, the extent of the damage to the facility remains unclear. Israel’s military issued a public warning via social media hours before the attack, urging residents near Arak and the nearby city of Khondab to evacuate for their safety. This followed a series of Israeli strikes on other Iranian nuclear sites, including the Natanz enrichment facility and centrifuge production centers near Tehran.
The strike on Arak coincided with Iranian retaliatory missile barrages targeting Israel, including a reported “direct hit” on a medical building in Tel Aviv. The Israeli Defense Forces (IDF) also reported ongoing operations in Tehran, targeting police headquarters and other strategic sites. The attack has raised international concerns about the risk of a broader regional conflict, with the IAEA urging Israel to refrain from targeting nuclear facilities.
As tensions escalate, the international community is closely monitoring the situation, with fears that the conflict could disrupt global energy markets and further destabilize the Middle East. The full impact of the strike on Iran’s nuclear program and the potential for further retaliation remain uncertain.