Astra Zeneca
Research Facility
Another of our contracts came when Astra Zeneca approached Envirotect to provide radiation shielding to one of their research facilities.
Plywood was applied to the steel wall onto which the lead lining was added using chevron rails.
With the lead added, vertical beams were attached and plasterboard mounted to provide a finish and disguise the shielding.
Great care is taken with the detailing to ensure that no radiation leakage can penetrate the shielding.
St. James Hospital, Malta
PET CT Scanner Suite
An overseas project was awarded to Envirotect to provide protective radiation shielding to an entire PET CT scanner suite for St. James Hospital in Malta.
Envirotect was tasked with providing shielding for both the entire perimeter of the department as well as the internal walls.
With lead thicknesses ranging from 1.5mm-3.0mm the walls were shielded to the specification of the both the customer and Siemens, the PET CT scanner manufacturer.
A total of ten different doors were designed and tailor made for the customer including three sliding doors. The doors were manufactured in the UK and then shipped and installed on-site.
Envirotect also designed an 8mm lead lined stainless steel transfer hatch for easy transfer of radioactive materials between the preparation lab and injection room.
Envirotect were able to meet St. James Hospital’s highly specialised and specific requirements whilst providing radiation shielding to the whole department.
London Heathrow Airport
Non-destructive testing (NDT) Room
A quite different challenge for Envirotect was the construction of a self-contained x-ray room for inspection of aeroplane components at Heathrow airport.
As one of our industrial contracts the task entailed building a self-contained unit within an existing hanger with complete radiation shielding surrounding the unit. The room was purpose built to the customer’s specifications so that components could be inspected by x-ray.
A frame of the unit was constructed from steel and the perimeter was lined with plywood ready for shielding.
The room was then shielded by affixing lead panels and included lead joint fillets to guard against radiation leakage at the joints and corners. With the room fully shielded it was ready for finishing.
With the finish applied and fully shielded sliding doors installed the unit was complete and ready for use.
Linton House Imaging Centre, Cheltenham
PET Scanner Suite
Working for the main contractor, E W Beard, Envirotect were contracted to undertake all the shielding works required for this prestigious new scanner unit.
The structural shielding for the PET scanner entailed the installation of 8mm and 10mm lead to all walls and soffits to the scanner room, corridor, storage room and three injection rooms. The shielding to the ceiling was designed as a suspended system so that a multitude of services above could be installed without penetrating the lead but would allow access for maintenance whenever required.
The contract also encompassed the supply of the 20mm ‘lead equivalent’ observation window and all the shielded and non-shielded doors within the department.
Envirotect also undertook the shielding for an x-ray room on the first floor which included wall shielding, door set and operators screen.
King’s College, London
New Dental Institute
This project involved the manufacture and installation of the new x-ray screening cubicles for the King’s College School of Dental Institute.
Envirotect were commissioned to survey, design and install all the radiation shielding which included x-ray screens and door sets.
Each x-ray booth was supplied with a lead glass viewing window and sliding door.
The work led to further contracts within the department forging a good ongoing working relationship.
Kettering General Hospital, Northamptonshire
New Cardiac Catheterisation Procedures Unit
Following on from the success of Barnsley Hospital, Envirotect were again commissioned by Simons Construction to supply the shielded joinery package for Kettering General Hospital.
The new build project involved the manufacture and installation of steamed beech door sets and observation windows for the new cardiac catheterisation procedures unit.
As well as the joinery package Envirotect Limited also supplied the lead lined plasterboards direct to the dry lining contractor to undertake the required wall shielding.
St. James’s University Hospital, Leeds
Shielding to Brachytherapy Department
Envirotect were recently employed by Bovis Construction to install the lead shielding to the Brachytherapy Department at the new oncology wing sited at St. James’s University Hospital in Leeds.
The contract was awarded for the design and installation of the structural rooms as well as almost 200 tonnes of lead chevron blocks to shield the walls ranging in thickness from 15-50mm.
The most challenging task was to design and install six powered door sets each incorporating 15mm of lead.
The doors had to be hinged to match the other doors within their location which entailed fabricating special hinges and low deflection frames to take the 450kg loads.
Envirotect also supplied around a thousand sheets of lead lined plasterboard to the dry lining contractor for the general x-ray, CT rooms and operating theatres.
Princess Royal University Hospital, London Control Room
Envirotect have been chosen to supply a new control room at the Princess Royal University Hospital in London.
Our project comprised of the design, fabrication and installation of a demountable control room.
A timber frame was constructed in the corner area in preparation for the application of shielding.
Onto this frame, Envirotect’s lead-lined MDF laminate panels were added for shielding as were lead fillets to prevent leakage of radiation at the corners and joints.
The project was completed by the addition of a radiation shielded sliding door and a panel of lead glass to shield the observation window.
Inside a work surface was installed.
The finished project was a fully shielded observation area made to measure for the customers’ requirements.
