The indigenously built Kaiga Atomic Power Station (KAPS) has created a world record for the longest uninterrupted operation for 941 days.

The earlier record of 940 days of continuous operation was held by a British reactor called Heysham-2, Unit-8 reactor . The Kaiga Nuclear Plant is located situated at Kaiga, near the river Kali, in Uttar Kannada district of Karnataka. It is an indigenous PHWR fuelled by domestic fuel (uranium) and started operations in 2000.