Established in 1954 in Penza-19 (now known as Zarechny), PO Start initially produced warhead components for the Soviet nuclear arsenal. Beginning in 1963, PO Start served as a warhead assembly and disassembly facility.[1] In 2002, Rosatom announced it was ceasing all warhead assembly and disassembly work at this facility.[2]

In the 1990s, PO Start began producing detonation systems and other automatic and electronic components and subassemblies for nuclear munitions.[3] It appears to be continuing this work. Today, it also manufactures components for anti-tank and other advanced conventional weapons, as well as a range of civilian goods.[4]

In 2006, PO Start integrated the Zarechny-based Research and Design Institute of Radioelectronic Engineering (NIKIRET) into its structure. Established in 1962, NIKIRET is one of the largest producers of sensors and security equipment for Rosatom facilities and other applications, including border control.[5]
 
Sources:
[1] "История" [History], PO Start website, undated, www.startatom.ru (accessed 9 October 2012).
[2] Oleg Bukharin and James Doyle, "Verification of the Shutdown or Converted Status of Excess Warhead Production Capacity: Technology Options and Policy Issues," Science & Global Security, 10/2002, p. 104.
[3] Oleg Bukharin, "Downsizing Russia's Nuclear Warhead Production Infrastructure," The Nonproliferation Review, Spring 2001, pp. 124.
[4] "История" [History], PO Start website, undated, www.startatom.ru (accessed 9 October 2012).
[5] "История" [History], NIKIRET website, undated, www.nikiret.ru (accessed 9 October 2012).