To be finished for Vladimir Lenin's 100th anniversary, construction of K-320 was rushed. During a hydraulic test of the primary coolant circuit, the reactor became prompt critical and generated full effect for 10–15 seconds.
For Vladimir Lenin's 100th anniversary completion, the construction of K-320 was rushed. While conducting a hydraulic test on the primary coolant system, the reactor reached criticality and generated its maximum output for 10 to 15 seconds.