A radiation shielding block for constructing structural walls having flat opposed front and rear surfaces defining a thickness of the block, continuously curved, sinusoidal opposed left and right surfaces and top and bottom surfaces. The continuously curved, sinusoidal surfaces have a regular repeating wavelength pattern having a wave direction that is perpendicular to the flat front and rear surfaces, and a length that is two complete wavelengths of a sinusoidal wave. A plurality of the radiation shielding blocks are stackable in a staggered wythe construction having a plurality of wythes and at least one successive course of blocks set atop a previous course of blocks such that the continuously curved, sinusoidal surfaces of the successive course of blocks engage complementary continuously curved, sinusoidal surfaces of the previous course of blocks, and the successive course of blocks is offset by one wavelength from the previous course in a front-rear direction.

A method according to one embodiment includes securing a first plurality of conductive sheets to a surface, applying a conductive tape to a first plurality of joints between conductive sheets of the first plurality of conductive sheets, and securing a second plurality of conductive sheets to the first plurality of conductive sheets without fully penetrating the first plurality of conductive sheets. In such an embodiment, each of a second plurality of joints between conductive sheets of the second plurality of conductive sheets is offset relative to the first plurality of joints.

An electromagnetically insulating device includes a body material, an electrically conductive EMI attenuation layer, and a plurality of conductive elements. The body material is substantially planar and flexible. The EMI attenuation layer is positioned inside the body material. The plurality of conductive elements are positioned in the body material. The EMI attenuation layer and the plurality of conductive elements are configured to be electrically connected to an external ground connection.

A shelter with electromagnetic interference (EMI) protection includes first and second wall panels including EMI protection. The panels are connected by at least one of: (i) a hinged connection; (ii) a scissor joint connection. The hinged connection includes an EMI protected hinge that extends between the first and second panels and includes a first hinge leaf, a second hinge leaf, and a hinge joint. A flexible EMI protection covering extends across the hinge joint. The scissor joint connection includes a first hook connected to the first panel and a second hook connected to the second panel and an EMI gasket is located in an open channel of the first hook. Part of the first hook is received in a second open channel of the second hook and part of the second hook is received in the first open channel of the first hook and the gasket is compressed.

At least some embodiments of the present disclosure provide a roofing accessory that includes a radiofrequency radiation shielding non-woven fiber composite material. The radiofrequency shielding non-woven fiber composite material includes a first fiber type that includes a conductive material, where the radiofrequency shielding non-woven fiber composite material has a sufficient amount of the first fiber type so as to result, when the radiofrequency shielding non-woven fiber composite material is positioned on a roof structure, in the radiofrequency shielding non-woven fiber composite material allowing for shielding a predetermined percentage of electromagnetic radiation passing through the roof structure. The radiofrequency shielding non-woven fiber composite material includes a second fiber type that includes a non-conductive material. The first fiber type and the second fiber type are randomly dispersed within the radiofrequency shielding non-woven fiber composite.

The object of the invention relates to a neutron absorbing concrete wall (10), which concrete wall (10) has an internal delimiting surface (11a), and an external delimiting surface (11b) on an opposite side to the internal delimiting surface (11a), the essence of which is that it contains a first concrete layer (13a) on the side of the internal delimiting surface (11a), and a second concrete layer (13b) on the side of the external delimiting surface (11b), which first concrete layer (13a) contains at least 0.05 mass % boron-10 isotope (10B), and the second concrete layer (13b) is formed as heavyweight concrete. The object of the invention also relates to a method for creating a neutron radiation absorbing concrete wall (10) that has an internal delimiting surface (11a), and an external delimiting surface (11b) on an opposite side to the internal delimiting surface (11a), the essence of which is a first concrete layer (13a) containing at least 0.05 mass % boron-10 isotope (.sup.10B) is formed on the side of the internal delimiting surface (11a), and a second concrete layer (13b) created as heavyweight concrete is formed on the side of the external delimiting surface (11b). The object of the invention also relates to a neutron absorbing concrete wall (10), the essence of which is that it is formed as heavyweight concrete containing at least 0.05 mass % boron-10 isotope (.sup.10B).

In some implementations, a conductive concrete composition for providing improved shielding against electromagnetic radiation comprises cement, one or more supplementary materials, aggregates, one or more carbon products, and fibers. In some implementations, the composition comprises between about 5% and about 40% by weight of cement, between about 1% and about 20% by weight of one or more supplementary materials, between about 5% and about 80% by weight of aggregates, between about 1% and about 40% by weight of one or more carbon products, and between about 1% and about 10% by weight of fibers. In some embodiments, the one or more supplementary materials comprises ground granulated blast furnace slag (GGBS), the one or more carbon products comprises graphite, and the fibers comprise steel fibers. The aggregates can include normal weight, lightweight, and/or fine aggregates.

Electromagnetically shielded and self-supporting panels form a shielded enclosure. The use of prefabricated, shielded and self-supporting panels to construct an enclosure reduces the time and cost of constructing such an enclosure.

A shielding system includes a plurality of transportable modules, wall panels, or pods that are connectable to form a containment area and to define a radiation barrier. Each of the plurality of transportable modules has a first radiation wall defining the containment area, a second radiation wall spaced apart from the second wall, and a radiation shielding fill material positioned between the first radiation shielding wall and the second radiation shielding wall. The radiation shielding fill material includes one of a superabsorbent polymer (SAP) filling a portion of a void between the first radiation wall and the second radiation wall, or a non-Newtonian fluid completely filling the void between the first radiation wall and the second radiation wall. A quantity of the radiation shielding fill material is sufficient to substantially reduce measurable radiation level outside the containment area.

A magnetically shielded room reducing pressure felt by a person inside includes an upper shielding body, a side periphery shielding body, and a lower shielding body, all of which define a magnetically shielded inner space. A magnifying lens is located in the upper shielding body. The magnifying lens can magnify and project an incident image from outside to a range of one inner side surface of the magnetically shielded room. so that the range should be 50% or more of the area of the one inner side surface. The range includes most of the area above a line of sight of a person in the magnetically shielded room. The magnifying lens is provided at a position closer to the one inner side surface as a projection target of the lens than the other inner side surface as a non-projection target facing the one inner side surface as the projection target.