Nuclear Electromagnetic Pulse Effects Design Parameters for Protective Shelters

摘要

The construction of new facilities requiring NEMP protection will require that designers incorporate as many protective measures as dictated by the expected threat levels. The definition of protective measures, devices, and techniques to achieve optimum use of these measures in existing structures has also been the aim. The operation and installation of various protective devices designed to provide power, signal, control and data line immunity from NEMP effects covers one aspect. In addition, where engineering data has been available on these protective devices, favorable aspects along with inherent difficulties which may arise as a result of their installation are described. Maximum shielding protection from direct radiated or induced NEMP fields is obtained using continuous metal surfaces such as welded steel enclosures; however, a limited amount of protection is afforded in making use of existing structural reinforcement steel (or wire mesh) imbedded in concrete walls, floors and ceilings. Structures designed to reduce the NEMP fields will be degraded when openings are made into the structure. These include ventilation and air conditioning ducts, conduit penetrations, water and gas line entrances, etc. Methods for coping with these penetrations into an NEMP-free or reduced environment are discussed. (Author)