Seguridad y Medio Ambiente FUNDACI�N MAPFRE

Year 31 Nº 122 2011

Station blackout accident at Fukushima

SAFETY. An analysis of the phenomenology of the earthquake and tsunami-induced station blackout accident at the Fukushima Daiichi plant, Japan and its consequences, is attempted. Substantial fuel damage and partial core meltdowns are surmised to have occurred in units 1, 2 and 3 with flooding in the reactors basements from suspected leaks in the piping to the containment vessels. Core uncovery occurred in unit 1 at 5 hours after the combined earthquake-tsunami event with the fuel temperature reaching 2,800 oC at 6 hours into the event.Partial core damage of unit 1 with the formation of a debris bed at the bottom of the core occurred at 16 hours into the accident with its reactor building’s basement flooded under 4.2 m of water. The pressure vessels of units 2 and 3 are likely to be damaged and leaking water from their bottoms. Units 4-6 were not operational and were shut-down for maintenance.

By DR. MAGDI RAGHEB 
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Hygiene, Health And Safety Conditions Public Swimming Pools

SAFETY. This study examines the level of compliance by swimming-pool construction and reform projects...

By JOAQUÍN GÁMEZ DE LA HOZ.,ANA PADILLA FORTES.
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Small-craft waste management

ENVIRONMENT. Every day coastal fishing and yachting activities generate thousands of tons of waste ...

By YOLANDA LISTA PERISCAL.
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Marine litter in coastal waters

ENVIRONMENT. This article presents a system for evaluating and monitoring the responses of the ecosystem to global change ...

By D. Alcaraz-Segura,J. Cabello, C. Bagnato, A. Altesor, C. Oyonarte, M. Oyarzabal,J.M. Paruelo.
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