Scottish Nuclear was formed as a precursor to the privatization of the Electricity Supply Industry in Scotland on 1 April 1990.
A purpose-built headquarters was built in 1992 in the new town of East Kilbride.
- Hunterston A Nuclear Power Station - Magnox (by then shut down)
- Hunterston B Nuclear Power Station AGR
- Torness Nuclear Power Station - AGR
On 1 April 1990, the nuclear generation assets (Hunterston A, Hunterston B and Torness Power Stations) of SSEB were vested in a new private company - Scottish Nuclear.
1996 the Magnox reactor - Hunterston A - was transferred to Magnox Electric - established to own and operate the Magnox nuclear stations.
The assets of Magnox Electric were later combined with BNFL in 1998, and eventually operated and managed by US based Energy Solutions through its June 2007 acquisition of the BFNL subsidiary - Reactor Sites Management Company.
The remaining two advanced 'AGR' nuclear plant assets of the company were combined with the assets of Nuclear Electric and became a part of the newly formed and soon to be privatised British Energy (now EDF Energy).