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This service is more advanced with JavaScript available, Earthquake Engineering for Nuclear Facilities Additionally, the equipment of the residual heat removal system that releases residual reactor heat to the sea stopped functioning because the sea water pumps for cooling were flooded by the tsunami. RESISTANT DESIGN. The damaged fuel cladding caused the radioactive materials inside the fuel rods to be released to the outside of the reactor pressure vessels. + 14.5 m around Units 5 and 6 (Fig. The left house was reinforced to enhance its seismic resistance, while the other one was not. Therefore, the reactor was brought to the cold shutdown status by shifting the reactor mode switch to the shut down position. Therefore, water was dropped into the spent fuel pools by helicopters and water cannons by the self-defense forces, fire brigade, and police. [2] According to the Earthquake Engineering Research Institute, precast panel buildings had good durability during the earthquake in Armenia, compared to precast frame-panels. Thus, two wooden houses built before adoption of the 1981 Japanese Building Code were moved to E-Defense[5] for testing (see both pictures aside). An Introduction to EarthquakeResistant Design Stephen Mahin Nishkian Professor of Structural Engineering University of California at Berkeley 777 Davis Hall 693 6972 mahin berkeley edu CEE 227 Earthquake Engineering U C Berkeley Spring 2008 UC Regents Preface 1 The Earthquake Challenge Earthquakes provide one of the most challenging problems facing the structural engineering … This resource page provides an introduction to the concepts and principles of seismic design, including strategies for designing earthquake-resistant buildings to ensure the health, safety, and security of building occupants and assets.. Its overall goal is to make such structures more resistant to earthquakes. This introduction to the NEHRP Recommended Seismic Provisions is intended to provide these interested individuals with a readily understandable explanation of the intent of earthquake-resistant design and requirements of the Provisions. The water injected into the reactor pressure vessel was turned into steam by the heat generated by the nuclear fuel and the pressure inside the reactor pressure vessel continued to rise without core cooling. There was a difference in the amplification of the ground motion at the site owing to the presence of an old fold structure in the shallow ground (approximately 2–4 km deep). While no structure can be entirely immune to damage from earthquakes, the goal of earthquake-resistant construction is to erect structures that fare better during seismic activity than their conventional counterparts. 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