Video: Helena Bonham Carter has radioactive pipe removed from house
The four-mile long radioactive pipe ran beneath Carter's garden and discharged "diluted chemical and radioactive components from Harwell's Atomic Energy Research Establishment into the Thames" river, according to BBC.
Angela Vincent, of Research Sites Restoration Ltd, said the couple and other villagers were not in danger.
"From our previous experience excavating other sections of the pipeline, excavation and removal of the pipe will not release airborne contamination.
"Nevertheless, as a precautionary measure, airborne radiation detectors will be positioned in the area for reassurance purposes.
The pipe discharged treated water from Harwell into the River Thames until March, when the decision was taken to decommission it.
Work to clear equipment and a further section of pipeline will take place over the next few months.