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Event Brief

208 kg of heavy water leaked from Wolsong-4 reactor

Heavy water leaked from the Wolsong-4 nuclear reactor, and no radiation issue was reported.
WHO: Wolsong-4 nuclear reactor
WHAT: Leakage of 208 kg of heavy water from the Wolsong-4 reactor; no radiation issue reported
WHEN: Jul 1, 2026 at 6:53 PM ET
WHERE: South Korea
WHY: Cause not yet established.

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