Plug impact at Heysham 1

3 August 2002

British Energy reported an event at Heysham 1 involving a fuelling machine operation at a fuel storage tube. The machine had collected a new fuel assembly from the tube and had replaced this with a short shield plug. Unknown to the operators, and contrary to indications at the fuelling machine, the shield plug had not disconnected from the machine grab. A mechanical interlock designed to prevent the machine moving until safe to do so had failed. This allowed the machine to move sideways, causing the shield plug to collide with the storage tube. The shield plug broke in two, with the lower part falling into the storage tube.



Privacy Policy
We have updated our privacy policy. In the latest update it explains what cookies are and how we use them on our site. To learn more about cookies and their benefits, please view our privacy policy. Please be aware that parts of this site will not function correctly if you disable cookies. By continuing to use this site, you consent to our use of cookies in accordance with our privacy policy unless you have disabled them.