Nuclear Power Corporation of India Ltd

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Cyber security

2026: data breach

Surendra.Singh, July 16, 2026: The Times of India

New Delhi : Nuclear Power Corporation of India Ltd, which is leading construction and operation of reactors at the Kudankulam nuclear plant, as well as Anil Ambani’s Reliance Group, whose arm Reliance Infra was involved with building infrastructure at two units, Wednesday said its core systems were untouched by a “cyber security incident”, after well-known ransomware group World Leaks posted a huge cache of files related to the plant on the dark web and claimed data breach. 


NPCIL and Russia’s Rosatom are jointly developing the 6,000-MW Tamil Nadu-based nuclear plant. While units 1 and 2 are operational, units 3, 4, 5, and 6 are under various stages of construction and commissioning. Reliance Infra was involved in designing and building infrastructure for the plant’s unit 3 and unit 4 in 2018. 


The nuclear plant, located in Tamil Nadu, is the largest of India’s nuclear plants.

Files are not related to nuclear safety, security: NPCIL

In response to a TOI query, spokesperson of Anil Ambani’s Reliance Group said, “The company was informed by Yotta Data Services Private Limited (Yotta), its third-party data centre service provider, of a cybersecurity incident involving an attempted ransomware attack that resulted in partial breach of data hosted on one of Yotta’s servers. Yotta has informed the company that the suspicious process was identified and terminated immediately, and the incident was contained and also that no ransomware execution, data loss, or lateral movement occurred, and services were restored.”


The company spokesperson further said, “Yotta has confirmed that enhanced security monitoring and preventive controls are now in place. The company has directed Yotta to conduct a detailed investigation and submit a report. The incident has been reported to CERT-In and disclosure has been made to the stock exchanges.” 


When asked about the claims that 19,000 of the 8.6 lakh Reliance files put on the World Leaks website ap peared to be most sensitive, NPCIL executive director (CP&CC) Prateek Agrawal told TOI , “They (files) are not at all related to nuclear safety and security. Like thermal power plants, tenders are issued for common services. Such common services are not associated with the core systems of the nuclear plant.” 


In a statement, NPCIL said the engineering, procurement and construction contract for the common services awarded to R-Infra is of conventional nature and is typically found in thermal power plants as well as other process industries. “They are not related to nuclear safety or nuclear security systems.”