Japan halts Onagawa reactor after water leak; no off-site radiation detected

Tohoku Electric is shutting down the Onagawa nuclear reactor after a contaminated water leak, though the operator says the water was contained and no abnormal radiation was detected outside the plant. The incident is a first operational halt at the unit since its 2024 restart, raising questions about Japan's nuclear restart program. Market impact is limited unless the leak escalates or prompts broader regulatory scrutiny.