in Bournemouth and Poole for staff to rent, as well as 127 in Weymouth, 100 in Dorchester, 24 in Wareham and 12 in Wool. The Durley Hall Hotel at Branksome Chine was bought in 1958 for single staff and temporary accommodation. Construction began in 1957, and the first low-energy reactor, ZENITH, was completed and in operation by the end of 1959. The site did not officially open until 16 September 1960. This was quickly followed by two new reactors, NESTOR in 1961 and DIMPLE in 1962. Many others followed. Cockcroft also suggested that larger fusion reactors be built at Winfrith, but this was met by serious pushback from the scientists involved in the programme. This work instead moved to today's Culham Centre for Fusion Energy. Staffing peaked at 2,350 in 1966, but the site slowly wound down and the staff was 1,800 by 1978. The largest reactor at the site (SGHWR), closed in 1990, and the site turned primarily to disposal of nuclear waste. In 1995 the eastern part of the site became the Winfrith Technology Centre, and 218 acres on the western side were decommissioned. The last reactor was shut down in 1995, although decommissioning of the site will not finish till 2021. Winfrith housed several experimental reactors during its lifetime. There were also impact test facilities, and a used nuclear fuel examination facility with the associated hot cells. Experimental reactors included: ZENITH (Zero Energy High Temperature Reactor) built in 1959. It was a zero-energy reactor which was used to study the physics of high temperature reactors. NESTOR (Neutron Source Thermal Reactor) built in 1961. Based on the JASON reactor operated by the Hawker Siddeley Nuclear Power Corporation at Langley, Berkshire. NESTOR was a small research reactor which produced a large amount of neutrons making it a useful tool for investigating the design of power-producing reactors and carrying out sub-critical experiments on core assemblies. DIMPLE (Deuterium Moderated Pile of Low Energy) built in 1962. Originally built at Harwell in 1954, Dimple was Britain's first heavy water reactor. It was moved to Winfrith in 1962 and extensively modified and rebuilt for studies of the physics of reactor systems moderated by light or heavy water and by an organic moderator. ZEBRA (Zero Energy Breeder Reactor Assembly) built in 1962. Designed for studying the neutron physics of a wide variety of fuel assemblies containing uranium and plutonium. HECTOR (Hot Enriched Carbon-moderated Thermal