Dounreay's Famous 'Golf Ball' Will Be Painted – But When Will It Finally Come Down?

21st September 2026

There is something slightly strange about spending money painting a building which is eventually going to be demolished.

That is what is happening at Dounreay, where the famous steel sphere containing the Dounreay Fast Reactor is being maintained while the difficult job of removing what remains inside it continues.

An article published by Autonoción has picked up on the apparent contradiction. The 135-foot-wide sphere is due eventually to disappear, yet Nuclear Restoration Services has been arranging work to deal with areas of corrosion. The reason is straightforward: the building is still needed because the reactor inside has not yet been completely emptied.

The really interesting part of the story, however, is what the latest official documents tell us about how long this process could continue.

The Dounreay Stakeholder Group meeting pack for its public meeting on 3 June 2026 contained the latest NRS Dounreay performance report for January to March. It says that 30 breeder fuel elements had been transferred from the reactor to the D2160 processing cell during the financial year. That achieved the site's target, although the equipment used to process the material had required repairs.

These are not ordinary pieces of old machinery that can simply be removed with a crane. When the Fast Reactor closed in 1977, almost 1,000 breeder elements were left stuck inside the reactor after swelling and becoming jammed. Removing them has required specially developed remote equipment and a long-running programme of work.

The latest NDA Business Plan gives a target of 2027/28 for completing removal of the breeder fuel from the Dounreay Fast Reactor and transferring it to interim storage. It also says that transport of the material to Sellafield will continue in later years.

But that is not the same thing as saying that the famous sphere will come down in 2027 or 2028.

In fact, the NDA Business Plan contains no timetable for demolition of the sphere. More importantly, its overall Dounreay timetable is currently marked TBD because the Dounreay Lifetime Plan is under review. The Business Plan says dates will be inserted once the new plan has been approved.

This is where the story becomes more significant for Caithness.

The Dounreay Stakeholder Group meeting took place in June, shortly after the NDA Business Plan had been published. The minutes record the NDA representative saying that the Business Plan had been published and the chair invited questions. The minutes then simply state: “No questions were raised.”

The NRS Dounreay report was then taken as read. There were questions about remote working, local employment, multi-year contracts and housing for incoming workers, followed by a discussion about the site's future plans. But the minutes do not record a question about the absence of a Dounreay completion date in the new NDA plan.

That is perhaps understandable. The stakeholder group deals with a huge amount of information and the technical reports are detailed. The NRS report itself presents a generally positive picture of progress, saying that all committed milestones for the year had been completed, with breeder fuel work meeting its target.

There are, nevertheless, some important qualifications.

The report says Dounreay is receiving an increasing share of resources over the next five years because of the need to reduce high hazards and recover the condition of some assets, while acknowledging an extended decommissioning timeline. The site also remained under enhanced regulatory attention, although progress was being made towards returning to routine regulatory oversight.

So the paint on the sphere is not quite as odd as it first appears.

If the reactor still contains radioactive material that has to be removed remotely, the sphere remains part of the containment and protection arrangements. NRS has previously explained that maintaining the integrity of the structure is necessary while decommissioning continues.

The more interesting question for Caithness is therefore not “Why are they painting something they are going to demolish?”

It is “How much longer will Dounreay remain in this intermediate stage?”

The latest official plan gives us one reasonably clear milestone: the remaining breeder fuel is supposed to be out of the reactor by 2027/28. Beyond that, however, the wider timetable is being reconsidered.

That makes the famous Dounreay sphere rather more than a curiosity. It is a visible reminder that nuclear decommissioning is measured not in years but in decades.

And while the rest of us may look at the steel “golf ball” and wonder when it will finally disappear from the Caithness skyline, the people responsible for Dounreay have a much more immediate concern: getting what is inside it out safely first.

One question that perhaps deserves to be asked at the next stakeholder meeting is what the revised Dounreay Lifetime Plan is expected to say about the eventual demolition of the sphere and the wider site end state.

NDA Business Plan 2026 to 2029

Dounreay Stakeholders Meeting 3 June 2026

Autonotion Article