Lead lined cabinets are utilized across a wide variety of industries including hospitals, nuclear medicine and the nuclear power industry. Some of the applications of shielded cabinets are for storing radioisotopes, radioactive waste, and providing shielding while operating x-ray tubes and protecting sensitive electronic devices from external radiation damage.
MarShield’s shielded cabinets are custom manufactured, in steel or stainless steel, and lined with 1/32” to 2” or thicker lead. For shielding thicknesses less than 5/8”, lead sheets are layered, while over 5/8”, the lead is poured into the cabinet walls. Both methods provide seamless radiation protection.
Features and Designs
MarShield has a series of standard designs of cabinets that show features and general design of cabinets. Most cabinets are custom designed and built to best serve the end-use of the cabinets.
Doors, Drawers and Shielded Openings
A shielded cabinet should provide complete radiation protection while allowing for easy access to the interior. All MarShield cabinet drawers and doors are designed to prevent radiation leakage by overlapping joints and seams. Radiation generally travels in straight lines, so by including steps and interlocking doors, this reduces the risk of radiation leakage from these openings. Shielded lids and openings can be provided at the top of the cabinet to allow for waste disposal of radioactive material.
Some cabinets require electronics to be powered inside the cabinets. Shielded openings that allow cables to run inside without compromising shielding can also be included. These openings can be described as maze entrance, as they eliminate the possibility of straight-line radiation leaving the cabinet.
Doors can include handles that lock shut to secure the contents of the cabinet. Heavy-duty industrial hinges are used to take the weight of the lead-lined doors. Additionally, if the weight of the lead-lined door is still too much, MarShield can offer to install gas struts that reduce the amount of force required to open doors. All cabinet hardware is welded onto the outside of the cabinets, rather than bolted as to not compromise shielding.
A factor that should be considered is the weight of what you are storing as well as the overall weight of the cabinet. Typically, the adjustable interior shelves can support up to 100 lbs. The overall weight of the cabinet can be quite heavy. MarShield cabinets include 4” adjustable legs to allow the cabinet to be moved easily by forklift or pallet truck. The maximum load that the floor the cabinet is installed on should be checked before installing a lead-lined cabinet.
MarShield can off lead-free NanotekTM to protect against gamma radiation or if the cabinet is required to shield against neutron radiation, borated polyethylene can be used as shielding.
Finish and Countertops
All MarShield cabinets come with a beige spray epoxy enamel or colour of the customers’ choosing. Additionally, if desired, there is the option of a 304 stainless steel countertop, that includes a spill-proof lip around the edge of the countertop and a backsplash.
Some considerations when designing a cabinet are:
- Required inside or outside dimensions – Cabinets are built based on the customers’ needs so the space the cabinet needs to fit into, or the required interior space needs to be known.
- Shielding thickness and type of shielding required – This will determine the thickness of the cabinet walls and the method used to build the walls.
- Number of shelves required in the cabinet or additional areas needed for storage.
- If the doors need to be locking and the location of hinges and handles.
MarShield custom cabinets are designed to meet the needs of the user. With a variety of features offered, MarShield can put together for the perfect cabinet suited for the job.
If you have any questions on how a shielded cabinet can be best designed for your purposes, you can visit the MarShield website or contact MarShield directly, and we will help you find the best radiation shielding solution for you.