Nuclear Decommissioning - Demolition Starts On Windscale Chimney
1st March 2019
The first blocks of concrete have been removed from the top of one of the world's most recognisable chimneys.
This marks the start of the demolition of Sellafield's Windscale Pile One stack.
The 125m tower - the scene of Britain's worst nuclear accident - will now start to disappear.
Workers are cutting out 6-tonne ‘chunks' of concrete using diamond wire saws.
The blocks are then removed with the help of a giant crane, which at 152 metres is the tallest structure ever built at Sellafield, just six metres shorter than the Blackpool Tower.
Stuart Latham, head of remediation, said:Following a period of intense planning, we're delighted to share this very visible demonstration of the work being done to make Sellafield a safer place.
Not only does it reduce the risk associated with this historic, redundant stack, but it will also change the Sellafield skyline forever.
This is a huge step in our clean-up mission at Sellafield , so everyone was incredibly proud to see those first blocks safely removed. This is thanks to the dedication and collaboration of the Sellafield and supply chain teams involved.
The Windscale Pile One chimney, with its distinctive top-heavy appearance, has dominated the Sellafield skyline for nearly 70 years.
The first piece to go will be the square-shaped ‘diffuser’ at the top, which will disappear before 2022.
Famously, this bulky filtration system was a last-minute addition, placed unusually at its summit.
Despite being mockingly referred to as ‘Cockroft’s Folly’, after its designer Sir John Cockroft, it turned out to be a masterstroke.
In 1957, fire broke out in the Windscale Pile One reactor. The sky-high filters captured an estimated 95 per cent of the radioactive dust created.
Now, the chimney is a decommissioning project.
Teams from Sellafield Ltd and its supply chain are working together to safely pull it down.
The project is a collaboration between Sellafield Ltd and the supply chain. Partners include: DSA Progressive Alliance (Cavendish and AECOM) for design and engineering, DDP Framework ADAPT (Doosan Babcock, Atkins, and AREVA) for procurement and construction, and Access Installation Framework (Kaefer Engineering) for scaffolding systems.
Because buildings containing nuclear material surround the stack, traditional demolition techniques like explosives cannot be used.
The Nuclear Decommissioning Authority and US Department of Energy's National Nuclear Security Administration (NNSA) have completed the transfer of around 700kg of highly enriched uranium (HEU) from Dounreay, in the north of Scotland, to the US. The HEU transfer, from Dounreay to the United States, was announced by the UK Government as part of its commitment to the 2016 Nuclear Security Summit held in Washington DC.
Dounreay Site Restoration Limited (DSRL) has opened the door to dozens of companies to play an active role in supporting the delivery of Scotland's largest decommissioning project. Construction of a size reduction facility, shaft and silo decommissioning and demolition of historic active laboratories are just some of the major projects expected to be delivered as part of a decommissioning services framework, potentially worth up to £400 million, which was announced on Tuesday 23rd April 2019.
The fund is provided by the Nuclear Decommissioning Authority and administered by Dounreay in association with the Dounreay Stakeholder Group. Community organisations or charities that benefit people in Caithness and North Sutherland may be eligible for assistance from the Dounreay Communities Fund.
The latest updates on radioactive particles released from Dounreay on beaches have been published. The latest find dates were - Dounreay Foreshore 11 January 2019 Sanside Beach 11 February 2019 Murkle Beach 26 November 2016 Nuclear fuel was reprocessed at Dounreay for almost 40 years.
Employees from across the Nuclear Decommissioning Authority (NDA) group were honoured at a national awards ceremony for their work in addressing gender imbalance and diversity in the nuclear industry. Phil Craig, former Managing Director of Dounreay, scooped the coveted ‘Ally of the Year' title at the Women in Nuclear (WiN) UK conference yesterday, for being a leading male advocate of gender balance and diversity.
Introduction to the Consultation How to respond In this consultation, the NDA wants to hear from members of the public, nuclear regulators, employees within our businesses, trade unions, local authorities, Site Stakeholder Groups, Non-Governmental Organisations and any other organisation or public body. In your response please state whether you are responding as an individual or representing the views of an organisation.
Information on working with Dounreay and the supply chain was recently updated and is updated now on a monthly basis. If your company is interested in working with Dounreay then check the details at - https://www.gov.uk/government/organisations/dounreay/about/procurement.
An emergency exercise will take place at Dounreay on the morning of Thursday 17 January. The site alert will be sounded to initiate the exercise.
In this consultation, the NDA wants to hear from members of the public, nuclear regulators, employees within our businesses, trade unions, local authorities, Site Stakeholder Groups, Non-Governmental Organisations and any other organization or public body. In your response please state whether you are responding as an individual or representing the views of an organisation.
The decommissioning of Dounreay's oldest nuclear reactor has taken a major step forward with the award of a multi-million pound contract. Dounreay Materials Test Reactor (DMTR) was the first operational nuclear reactor in Scotland and achieved criticality in 1958.
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