FlexShield is Marshield’s lead alternative, highly customizable shielding silicone based product designed for radiation hot spots focused on ALARA principles
MarShield introduces a new radiation shielding product, FlexShield – a product made up of flexible, tungsten-impregnated, silicone pieces. This versatile form or shielding comes in a variety of shapes for use in many hard-to-shield applications. It is non-toxic, easy to work with and cut, and the lightest shielding available at 4.5 lbs per square foot. It is ideal for shielding small pipes, such as those smaller than 1″ in diameter. This non-hazardous product offers effective radiation protection wherever it is needed. It is highly resilient to boric acid and sodium hydroxide, and can be used in temperatures ranging from -50º to 250ºC
Benefits of FlexShield
- .5” of FlexShield is equal to a HVL (50% reduction in dose rate)
- 1.2” to 2” FlexShield is equal to a TVL (90% reduction in dose rate)
- Approximately 4.5 lbs./sq. ft. of FlexShield is equal to 10 lbs./sq. ft. of lead wool.
- Temperature from -50°C to +250°C.
- Resistant to Boric Acid and Sodium Hydroxide.
- FlexShield requires no resealing and can be easily trimmed
Available Products and Sizes
Grommets: Make hanging or securing products easier during installation.
Magnets: New powdered premium magnetics available for FME (foreign material exclusion) purposes as well as a discrete magnet option
Metal: Adds support to the shielding. Almost all products are available with metal components when needed.
Permanent: Depending on application FlexShield may be installed as a permanent shielding solution for up to 40+ years.
Reactor Face Shielding
With 1” thick shielding built to the design of the reactor face we have confirmed 30 to 40% dose reduction in the general area. Considering the number of man hours spent in front of the reactor face this has proven to be a very significant reduction. This shielding is custom built for each reactor face and is installed across several nuclear power plants in Canada and the USA.
Composite shielding effective for gamma and neutron fields is now available for your Dry Fuel Storage campaigns. This high temperature shielding easily withstands the heat generated during forced helium drying which allows shielding to remain in place during the dewatered phase. A special blend of shielding material moderates and attenuates both fast and intermediate neutrons while the outer tungsten layer eliminates primary and secondary gammas. The lightweight design allows access to the weld locations without disturbing the majority of the shield package. 80-95% reductions in exposure rates have been achieved in field applications.
Gamma rays – Very penetrating and are best stopped or shielded by dense materials, such as lead or uranium. Gamma rays are similar to x-rays.
HVL (Half Value Layer) – the amount of shielding material to achieve 50% reduction in dose rate
TVL (Tenth Value Layer) – the amount of shielding material to achieve 90% reduction in dose rate
Radioactive Source – the radioactive element (e.g. Co-60)
Attenuation – the reduction in dose rate. (Eg., HVL or TVL)