A special programme of urine sampling on a radiography inspector has confirmed a committed dose equivalent to bone surfaces of 628 mSv and a committed effective dose equivalent of 32.4 mSv following a puncture wound to his right elbow sustained during an inspection of a weld in a plutonium facility. The inspector had to lie on the floor to gain access to the weld and in so doing felt a sharp prick in his elbow. The wound was excised and about 1500 Bq of plutonium was removed from the wound site. It is believed that the wound was caused by a sliver of glass from a mirror which had been used by a welder requiring high quality optical instruments to achieve the required standard of weld. Welding procedures are under review as a result to find means of avoiding glass in contaminated areas. Final assessment of dose was delayed by the administration of a chelating agent, DTPA, immediately following the wound to maximise plutonium excretion.