A significant leak of 25 tonnes of radioactive water has been detected within the spent nuclear fuel cooling pool of Reactor Unit 2 at the Tokyo Electric Power Company's TEPCO Fukushima Daiichi Nuclear Power Plant in Okuma, Fukushima Prefecture, Japan, as reported by China Media Group.

The utility company has assured the public that the nuclear-contaminated water has not leaked beyond the plant's containment and that the cooling system for the nuclear fuel is still functioning effectively.

To ascertain the precise location of the leak and its underlying cause, TEPCO plans to deploy robotic equipment for an inspection scheduled for this week.

On August 9, TEPCO announced that equipment related to the spent fuel pool of Reactor Unit 2 had malfunctioned, leading to concerns about the integrity of the cooling system.

Following the malfunction, TEPCO took precautionary measures and halted the cooling system for the spent fuel pool while an investigation into the cause of the malfunction commenced.

TEPCO's prompt response highlights the importance of safety and environmental protection at the Fukushima plant, especially in light of previous concerns surrounding radioactive discharges.

As more details emerge regarding the leak, TEPCO aims to maintain transparency and keep stakeholders informed about any developments.

The incident serves as a reminder of the ongoing challenges faced in managing and monitoring the safety of nuclear facilities, particularly after the Fukushima disaster of 2011.