A modular safety shelter provides protection from fragment, overpressure, radiation, and toxic hazards through a combination of physical design of modular segments, of joint seals between modular segments, of door assemblies, and of HVAC control systems. The modular shelter is formed of two or more prefabricated concrete modular segments each including a built-in foundation, roof, and side walls, and a prefabricated concrete vestibule segment providing an airlock-like access to the shelter. The prefabricated modular segments and vestibule segment are transported to a site and assembled to each other on-site to provide a fully enclosed space within the modular shelter. A multi-layer joint seal is formed between adjacent modular segments to prevent ingress of toxic, flammable, or thermal hazards. An integrated HVAC controller monitors toxic or flammable hazards outside and inside of the shelter, and controls HVAC systems to minimize spread of contaminants upon detecting a hazard.

An unmanned aerial vehicle (UAV) passage with physically real housing and enclosure, provides a reliable and secure aerial path space for the UAV in the populated urban areas. The ability of the modern UAV system to make an exact movement, as well as the high precision achieved by the indoor position system, makes regular UAV travel in a physically real tunnel-like corridor unchallenging. Appropriately lightened, EMI shielded, pressurized, with a wired and wireless communication link, the UAV passage creates a safe, reliable, and regulation-compliant flying environment for autonomous UAV flight missions or UAV deliveries deep in the urban areas surrounded by high rise buildings or clouded by controlled/restricted airspaces.

An inflatable habitat using inflatable structures and necessary accessories offers secure permanent human settlement in an environment such as Mars with an air pressure below the earth's atmospheric pressure. Built upon a crater, the inflatable structure comprises various resilient multilayer roof segments integrated with segment frames to contain extreme internal inflation pressures to provide habitability, maintenance of thermal environment, and low-cost manufacturability using local resources. The roof of the inflatable structure is firmly secured along a rim and a floor of the crater through a wall anchor system and a dual internal roof anchor system to provide a durable structure against hostile weather conditions. A “smart design” using the wall anchor system allows the installation of an outer roof in parallel to the existing roof. Further, a magnetic radiation shield generated through roof power elements externally encloses the roof to facilitate optimal active protection against solar and/or cosmic radiations.

An inflatable habitat using inflatable structures and necessary accessories offers secure permanent human settlement in an environment such as Mars with an air pressure below the earth's atmospheric pressure. Built upon a crater, the inflatable structure comprises various resilient multilayer roof segments integrated with segment frames to contain extreme internal inflation pressures to provide habitability, maintenance of thermal environment, and low-cost manufacturability using local resources. The roof of the inflatable structure is firmly secured along a rim and a floor of the crater through a wall anchor system and a dual internal roof anchor system to provide a durable structure against hostile weather conditions. A “smart design” using the wall anchor system allows the installation of an outer roof in parallel to the existing roof. Further, a magnetic radiation shield generated through roof power elements externally encloses the roof to facilitate optimal active protection against solar and/or cosmic radiations.

A temporary radiotherapy facility for use during renovation, upgrading, and/or modernization of an existing facility. The radiotherapy facility includes a central vault room containing a radiation emitting device and a platform for holding a quantity of radiation shielding material above the central vault room. The platform is supported by shear walls that are disposed outside the sidewalls of the central vault room such that the radiation shielding material is supported and suspended above the central vault room without being in contact with or bearing upon the central vault room or affecting the height or level of the central vault room.

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.

A modular safety shelter provides protection from fragment, overpressure, radiation, and toxic hazards through a combination of physical design of modular segments, of joint seals between modular segments, of door assemblies, and of HVAC control systems. The modular shelter is formed of two or more prefabricated concrete modular segments each including a built-in foundation, roof, and side walls, and a prefabricated concrete vestibule segment providing an airlock-like access to the shelter. The prefabricated modular segments and vestibule segment are transported to a site and assembled to each other on-site to provide a fully enclosed space within the modular shelter. A multi-layer joint seal is formed between adjacent modular segments to prevent ingress of toxic, flammable, or thermal hazards. An integrated HVAC controller monitors toxic or flammable hazards outside and inside of the shelter, and controls HVAC systems to minimize spread of contaminants upon detecting a hazard.

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 an example, a conductive concrete structure disclosed. The conductive concrete can include a plurality of conductive side structures defining an interior of the conductive concrete structure and a plurality of conductive concrete partitions disposed within the interior of the conductive concrete structure. The plurality of conductive concrete partitions are arranged to define a labyrinth within the conductive concrete structure.

A shielding enclosure for blocking electromagnetic pulses to protect electrical equipment includes shield panels having a layered structure of conductive sheets and insulating sheets between the conductive sheets with an outward conductive sheet at a first end of the layered structure and an inward conductive sheet at a second end of the layered structure, and a first ground wire connected to the outward conductive sheet for connecting to a ground, and a second ground wire incorporating a rectifier and connected to the inward conductive sheet for connecting to a ground, the rectifier being oriented to restrict the electric current in the second ground wire to flowing from the inward conductive sheet to the ground; where the shield panels are positioned so that the inward conductive sheet generally faces the electrical equipment and the outward conductive sheet generally faces away from the electrical equipment.