Khushab, commissioned in 1998 under the Pakistan Atomic Energy Commission (PAEC), is a cluster of indigenously engineered heavy-water moderated & cooled, natural uranium fueled reactors located ~30 km SW of Jauharabad. Reactor Units: 4 (K-I to K-IV)
Estimated Thermal Power: 40–90 MWt each
Moderator/Coolant: Heavy Water (D₂O)
The complex forms the core of Pakistan’s plutonium production line, enabling high-flux breeding for compact, implosion-type warheads.

Following withdrawal of support to the CIRUS reactor appearing after 1974 by Canada, India decided to make its own high flux research reactor. This led to the construction of DHRUVA by BARC at Trombay and reaching first criticality on 8 August 1985. Dhruva reactor is India’s largest indigenously designed heavywater moderated and cooled research reactor.