According to India’s Hindustan Times:
A seven-hour emergency was declared at a key nuclear power plant in Pakistani city of Karachi after heavy water leaked from a feeder pipe of the reactor but no one was affected by radiation, officials said on Thursday.
The emergency was declared at Karachi Nuclear Power Plant (KANUPP) at midnight on Tuesday after the leak in the primary heat transport system of the plant at Hawke’s Bay was detected.
The emergency at the plant built in 1971 with the cooperation of Canada continued till 7 am on Wednesday, when the situation was brought under control, a media report said.
The Pakistan Atomic Energy Commission announced today that a “minor heavy water leakage” occurred during a “maintenance job” at KANUPP in the early hours of October 19.