The Prime Minister's visit may mark the completion of work on Pakistan's second plutonium production reactor. Khushab is the home of the country's first plutonium production reactor (Khushab-I), which started work in 1998, and is the site where two new reactors are under construction. The construction of Khushab II appears from satellite imagery to have started in 2001-2002, while work on Khushab III seems to have started in 2005 or 2006.
If Khushab-II is the same power as Khushab-I, and both continue to operate, then Pakistan will be able to double its current rate of plutonium production for weapons. Together the two reactors, operating at 70 percent capacity, would produce about 22 kg of weapon grade plutonium per year.