Remote Handling CCTV Systems for Decommissioning
NUKEM
Background
Dismantling the inside of a nuclear reactor has to be undertaken remotely as the levels of radiation are lethal. Because of this the work is undertaken remotely mechanical tools powered and controlled from a safe location. Feedback is provided is provided by closed circuit television systems (CCTV) which allow the operators to progress the remotely undertaken work and to safety manoeuvre the machinery. The importance of understanding the limitations of the CCTV systems and any human factors-related factors are crucial to the safe and effective use of this system.
Project
The UKAEA Winfrith Reactor Decommisioning Engineering Services Team was developing the design for dismantling the Winfrith Steam Generating Heavy Water Reactor core. We were brought into the team to advise on the human factors principles that need to be considered in the specification of the CCTV systems to be procured to support the decommisioning works.
The main issues were around how CCTV would be used to support the remote operation of equipment to remove the hazardous material and human non-compliance with the procedural controls for the activities.
IMPLEMENTATION
We reviewed the operations to be performed remotely and the way in which the CCTV system would support this activity
The analysis included a review of the camera locations and the fields of view for both fixed and moveable cameras, the presentation of the images on a limited number of screens and computer modelling of the different images from the cameras
A set of human factor requirements have been prepared which will be incorporated into future CCTV procurement programmes.
Outcome
The current decommissioning programme for Wynfrith is on hold as the short-term programme is currently focussed on Sellafield and Dounray.