#521 2009 · Dounreay Site Restoration Ltd · Nuclear decommissioning
The industrial decontaminant was too slow, so a Dounreay worker tried the £1.99 supermarket cleaner from a TV advert on the plutonium instead
the problem
A specialized, expensive, industry-standard tool is underperforming on a specific job, and the default response is to look for a better version of the same specialized tool rather than testing whether a completely unrelated, cheap, off-the-shelf product happens to solve the same underlying chemistry or mechanics better
background
Dounreay, a former experimental nuclear power complex in Caithness, Scotland, has been undergoing a decommissioning process with an estimated cost of £2.6 billion. Among the structures being dismantled was a four-storey experimental chemical plant used in the 1980s to recycle plutonium liquor, consisting of vessels, pipes and boxes made of steel and toughened glass; the plutonium-bearing solutions that had run through the plant over its operating life left the steel visibly stained with contamination, which had to be cleaned before the components could be safely cut apart and removed.
The decontamination team's standard industrial cleaning fluid was slow at stripping the plutonium staining from the steel, adding time to an already multi-year, multibillion-pound project. One member of the team, having seen a television advertisement for Cillit Bang — a £1.99 supermarket household cleaner marketed on its ability to strip grime from a coin — suggested trying it on the contaminated steel instead of continuing to rely solely on the specialized industrial product.
what everyone would do
The default response to an underperforming industry-standard cleaning fluid was to look for a better, more specialized industrial product, staying within the category of purpose-built professional decontamination chemicals rather than considering anything outside that established toolkit.
what they saw
The Dounreay team member saw that the actual job, stripping stubborn staining from a hard surface, was a problem a consumer product had been engineered specifically to solve extremely well, even though Cillit Bang was never designed with nuclear decontamination in mind. Rather than assuming only a specialized industrial tool could address a specialized industrial problem, the fix was testing whether the underlying chemistry a cheap, off-the-shelf household cleaner was built around happened to solve the same removal problem better than the expensive professional alternative.
the move
The team tested the consumer cleaner directly against the plutonium-stained steel components, alongside another household product, Mr Muscle window and glass cleaner, used to decontaminate the plant's toughened-glass columns. Both household products outperformed the standard industrial cleaning fluid at removing the contamination from their respective materials, without requiring any change to the decommissioning process beyond swapping which bottle the team reached for.
why it works
Testing the £1.99 supermarket cleaner directly against the plutonium-stained steel, alongside a second household product for the toughened-glass columns, worked because the underlying task, breaking down and lifting a stubborn surface residue, was fundamentally the same chemistry problem the consumer products had been engineered to excel at for household stains, regardless of the professional context the specialized industrial fluid had been designed for. Because both household products outperformed the standard industrial cleaning fluid without requiring any change to the decommissioning process beyond swapping which bottle the team reached for, the fix delivered a real, measurable reduction in the £2.6 billion project's cost and timeline at essentially zero additional expense, which is exactly why other UK nuclear sites including Sellafield contacted Dounreay afterward to learn about applying the same approach to their own decommissioning work.
the payoff
David Hanson, project manager with Dounreay Site Restoration Ltd, said the effectiveness of Cillit Bang was helping drive down the overall £2.6 billion cost of demolishing the site. The story drew national UK media coverage, including reports in the Daily Telegraph and other national outlets, and other UK nuclear sites including Sellafield contacted Dounreay afterward to learn more about using the same approach on their own decommissioning work.
where it breaks
The mechanism depends on the underlying physical or chemical problem genuinely being the same one the consumer product was engineered to solve, a professional application whose challenge differs in some material way from the household version, requiring higher concentration, different material compatibility, or safety properties a consumer product wasn't designed to meet, wouldn't transfer the same advantage regardless of how effective the household product seemed superficially similar. It also depends on the consumer product actually being safe and compatible with the professional context's specific materials and safety requirements, a household cleaner that damaged the underlying steel or glass, or that introduced unacceptable safety or contamination risks in a nuclear environment, could create a new problem worse than the one it solved even if it cleaned effectively. And this kind of substitution requires someone on the team actually being willing to test an unconventional idea against an expensive, established professional standard, a team or organizational culture dismissive of testing consumer products against professional-grade problems would never discover the advantage even where it genuinely existed.
what came after
The Dounreay episode is cited in industrial and engineering circles as a memorable example of testing an unrelated consumer product against a specialized industrial job before assuming only a purpose-built professional tool can solve it, and it is referenced in discussions of decommissioning cost-control as a case where an essentially free process change produced a measurable reduction in project cost.
references
- [1]Cheap, dirty approach to atomic messesAnnals of Improbable Research, 2009improbable.com
- [2]Cillit Bang – Bang and the dirt is gone!Grocery Trader, 2009grocerytrader.co.uk