Friday, October 22, 1999 Published at 10:25 GMT 11:25 UK
Nuclear workers contaminated
It is feared nuclear dust contaminated workers at Trawsfynydd
Six workers at a nuclear power station in north Wales suffered internal radioactive contamination, according to British Nuclear Fuels Limited.
The workers were decommissioning the Trawsfynydd station in Gwynedd last June.
According to BNFL, no long-term damage to their health occurred.
But two workers suffered a significant dose equivalent a quarter of the annual dosage permitted. Four others had much lower traces of radiation.
Station manager Alun Ellis said the level of radiation for all workers undertaking that kind of work was tested regularly and samples sent for examination to Sellafield.
The two workers involved were part of a group of eight employed by a firm of German subcontractors working at the site.
The firm, Hertel, is one of the world's leading decontamination companies.
It is thought that dust from the cleaning process was responsible for the contamination and possibly a faulty seal on the breathing apparatus of the two men led to the incident.
BNFL immediately closed the area and called in the nuclear installations inspectorate to supervise an internal investigation.
The cause of the initial contamination has still not been discovered.
Decommissioning began at the Trawsfynydd plant in 1993.
It is a Magnox reactor and decommissioning is likely to take several decades.