Wardray PremiseNon-Destructive Testing Shielding |
| Part of the Wardray Premise Total Radiation Shielding Package |
Protective Lead Panels
Wardray Premise have provided a complete design, manufacturing and installation service for over 70 years. This has involved all types of shielded enclosures from small inspection boxes and cabinets to free standing rooms complete with totally shielded doors and incorporating cable ducts for all services.
We employ the services of an accredited Radiation Protection Advisor who will give advice to ensure that all work meets the current Ionising Radiation Regulations.
Radiation shielding can be accomplished using several types of material. Where space permits, dense concrete structures are cost effective and the incorporation of a maze can reduce the shielding required at an entrance door. However, the use of lead for x-ray shielding has the distinct advantage where space is at a premium or doors are required. Lead plywood or interlocking lead chevron bricks also have the advantage of being re-usable when a facility needs to be upgraded or relocated.
Our service also caters for power operation of exceptionally heavy doors, complete with manual override, battery back-up, light beam and movement sensors etc together with all necessary warning lights, interlocks and safety systems.
Please see our Shielding Materials pages for details of the materials we use for radiation shielding.
- X-Ray and Gamma Shielded Rooms
- Power Operated Lead Lined Doors
- Inspection Cabinets
- Neutron Source Containers
- Nuclear Facilities
- Enquiry Guide
X-Ray and Gamma Shielded Rooms
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Shielded NDT Cubicles
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X-Ray Room
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The first image on the right shows an example of an NDT installation designed and built at the Northern Centre of the Welding Institute for training and examinations.
The two free-standing rooms providing a twin facility accommodating a 250kV X-Ray unit and an Iridium 192 gamma source in a compact design and with an attractive overall appearance.
The second image shows the construction of a recent installation housing a 225kV X-ray Unit.
Both sites included power operated doors complete with all necessary interlocks and warning systems.
Power Operated Lead Lined Doors
TopThe images below show a typical example of one of 17 power operated lead lined doors in a completely new facility at the The lead shielding in the doors ranged from 7.5mm to 160mm, the latter weighing over 7 tonnes. The installation included all safety interlocks, shielding to walls and service ducts.
The images below illustrate a typical example of one of 17 power operated lead lined doors in a completely new facility at the National Physics Laboratory in Teddington, UK.
The lead shielding in the doors ranged from 7.5mm to 160mm, the latter weighing over 7 tonnes!
The installation included all safety systems and interlocks and each room had extensive shielding to wall and ceiling service ducts.
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Power Operated Lead Lined Doors
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Inspection Cabinets
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Testing Cabinet
The image on the right shows a typical example of a unit designed and produced to suit a customer's specific requirements. It involved the manufacture of an all-steel, totally automated lead lined cabinet for a 150kV X-Ray unit.
The unit sits on a 4 tonne scissor lift for accurate height adjustment. A 500kg motorised drawer allows easy access for placing the items to be x-rayed and a large single door gives access from the side.
Neutron Source Containers
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Premadex® is the most cost-effective material available for the construction of lightweight transport and storage shielding containers for highly active neutron sources such as Americium Beryllium (α,n) and Californium-252 (sf).
Its use eliminates the problem of secondary gamma rays and allows gamma shielding to be concentrated at the core of the assembly. This can result in substantial reductions in the overall weight of neutron source containers.
In the oil industry, the non-flammable nature of Premadex® is an important safety consideration. In the offshore environment, a lightweight Premadex® container also provides significant handling benefits.
Completed Contracts
These are some of the contracts completed for neutron source storage containers:
- British Nuclear Fuels plc
- Health Protection Agency
- Ministry of Defence
- Atomic Energy Authority
- BP Chemical Limited
- Atomic Weapons Establishment, Aldermaston
- FW Frost Limited, Norwich
- Halliburton Manufacturing and Services Limited
- Reeves Technologies Limited
- Baker Hughes Inteq Limited
Nuclear Facilities
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Premadex® can contribute to the safety of nuclear fission reactors in many ways. Its high attenuation and total absorption of neutrons can lead to reductions in prompt secondary gamma ray fluxes and radioactivation levels.
Simple uses include sealing ducts and penetrations where neutron scattering can be a major problem. It also offers a cost effective solution to the optimal shielding of mobile reactors.
Enquiry Guide
TopFor quotations and advice please provide the following information.
- Type and size of enclosure required.
- Structure, composition and thickness of any walls which may be incorporated within the enclosure.
- Clear opening sizes required for doors.
- Any reports on the specified shielding requirements from your own Radiation Protection Advisor.
If reports are not available please also provide:
- Details of the radiation source, type and output of the X-Ray equipment or Gamma Source.
- All required positions, heights and angles of the Radiation source in relation to surrounding walls and ceilings.
- Information on the surrounding area:
- Can access be limited?
- Location of other buildings.
- Can access over roof be limited?
- Location of unclassified personnel.
- Likely workload, type and sizes of test objects.
- Any relevant drawings, site layouts, etc., would be most helpful.