States. On 7 June 2019, there was a low-level radioactive contamination incident that led to the evacuation of the site. A DSRL spokesman said: "There was no risk to members of the public, no increased risk to the workforce and no release to the environment". On 23 December 2019, the NDA announced completion of the transfer of all plutonium from Dounreay to Sellafield, where all significant UK stocks of plutonium are now held. On 20 August 2020, a new date for the site to become available for other uses was announced of 2333, as part of a new draft strategy for reclamation. Framework contracts In April 2019, Dounreay Site Restoration Limited (DSRL) awarded six framework contracts for decommissioning services at Dounreay. The total value of these contracts is estimated to be £400million. Vulcan Nuclear Reactor Testing Establishment (NRTE) The Vulcan Naval Reactor Test Establishment (NRTE) (formerly HMS Vulcan) is a Ministry of Defence (MoD) establishment housing the prototype nuclear propulsion plants of the type operated by the Royal Navy in its submarine fleet. Originally it was known as the Admiralty Reactor Test Establishment (ARTE). For over 40years Vulcan has been the cornerstone of the Royal Navy's nuclear propulsion programme, testing and proving the operation of five generations of reactor core. Its reactors have significantly led the operational submarine plants in terms of operation hours, proving systems, procedures and safety. The reactors were run at higher levels of intensity than those on submarines with the intention of discovering any system problems before they might be encountered on board submarines. Rolls-Royce, which designs and procures all the reactor plants for the Royal Navy from its Derby offices, operates Vulcan on behalf of the MoD and employs around 280 staff there, led by a small team of staff from the Royal Navy. Reactors developed include the PWR1 and PWR2. In 2011, the MoD stated that NRTE could be scaled down or closed after 2015 when the current series of tests ends. Computer modelling and confidence in new reactor designs meant testing would no longer be necessary. The cost of decommissioning NRTE facilities when they become redundant, including nuclear waste disposal, was estimated at £2.1billion in 2005. Its final reactor shut down on 21 July 2015, with post operational work continuing to 2022. In March 2020, it was reported that tenders were being issued to decontaminate and dismantle the reactor complex under a ten-year