South Korea’s “Digital Pearl Harbor”
In recent days, South Korea has experienced the largest digital crisis in its history. A fire broke out at the National Information Resource Service (NIRS) data center in Daejeon, nearly paralyzing the government’s operations and depriving millions of citizens of access to online services. The source of the problem was the explosion of a lithium-ion cell in the uninterruptible power supply (UPS) system. Although the incident was technical in nature, its consequences turned out to be political, economic, and social. It is no wonder that President Lee Jae-myung compared it to a “digital Pearl Harbor.”
How did the fire start?
According to initial reports, the fire broke out during routine maintenance work. Technicians were attempting to move a UPS battery module to the basement to separate it from the server room. During this operation, sparking occurred, and one of the cells — from a batch produced by LG Energy Solution between 2012 and 2013 — exploded. The chemical reaction quickly triggered a domino effect known as thermal runaway, an uncontrollable rise in temperature that ignited the entire battery rack.
It is worth noting that the batteries were over eleven years old, while the manufacturer recommended their replacement after ten years. Some experts suggest that an improper maintenance procedure may also have played a role, as there is suspicion that cables were disconnected while still under live voltage.
Scale of destruction and consequences
The fire was fought for nearly 22 hours. More than 200 firefighters and 60 vehicles were involved in the effort, but the situation was extremely difficult — water could not be used in the server rooms, and lithium-ion fires are among the hardest to extinguish. Firefighters used carbon dioxide, followed by cooling and cell isolation methods to avoid damaging electronic equipment.
The consequences were dramatic. 384 battery modules were destroyed, and 96 server systems suffered direct damage. In total, 647 government systems were shut down as an emergency measure, resulting in the temporary unavailability of about one-third of public administration services. Mobile identity authentication, email systems, electronic signatures, and even emergency service geolocation for the 119 hotline stopped functioning. Many offices had to revert to paper documentation, creating organizational chaos and disrupting economic activity.
Government response and political fallout
The government responded immediately. Minister of Administration Yoon Ho-jung raised the alert level from “alert” to “serious,” while Prime Minister Kim Min-seok apologized to citizens and ordered the fastest possible restoration of critical services for safety and the economy. Authorities announced plans to migrate the most damaged systems to a backup cloud platform in Daegu.
LG Energy Solution faced a wave of criticism. Although the company emphasized that its batteries had passed safety tests as recently as June and that no similar failures had ever been reported for this model, public opinion and investors blamed it for supplying outdated modules. At the same time, experts increasingly suggest that the real problem may have been procedural negligence and failure to replace batteries after their recommended service life.
Systemic lessons for Korea and the world
The Daejeon incident exposed fundamental weaknesses in centrally concentrated digital infrastructure. For years, South Korea has invested in large-scale data centers to increase efficiency and reduce costs. However, the incident revealed that such a model amplifies the risk of single-point failure, where an outage in one facility can cripple an entire nation.
Equally important is the battery life-cycle issue. Lithium-ion modules used in UPS systems have a limited chemical lifespan, and as they age, they become less stable and more fire-prone. Beyond equipment replacement, it is crucial to implement modern battery management systems (BMS), thermal sensors, and physical separation between energy storage units and server halls.
No less critical are maintenance procedures and the human factor. Relocating UPS systems or disconnecting cables in critical infrastructure must be done under the highest safety standards. Even a minor mistake can lead to catastrophic consequences.
A global dimension of the crisis
The NIRS fire quickly became a topic of international debate. The data center industry worldwide faces similar challenges. As energy demand grows and system uptime becomes more crucial, lithium-ion battery storage has become the standard. However, their use in critical infrastructure requires specialized safety regulations. Industry organizations are already calling for stricter standards governing battery storage and maintenance.
The events in South Korea may become a turning point for regulatory policy not only in Asia but also in Europe and the United States. It is a warning signal that in a world dominated by digitalization, energy security and digital resilience are just as vital as military or financial infrastructure.