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Fukushima post-mortem
Mar. 1st, 2022 02:35 amBack in 2012, CEIP published an excellent post mortem on the Fukushima disaster. Excerpts:
Insufficient attention was paid to evidence of large tsunamis inundating the region surrounding the plant about once every thousand years.
Computer modeling of the tsunami threat was inadequate. Most importantly, preliminary simulations conducted in 2008 that suggested the tsunami risk to the plant had been seriously underestimated were not followed up and were only reported to NISA on March 7, 2011.
NISA failed to review simulations conducted by TEPCO and to foster the development of appropriate computer modeling tools.
Protecting emergency power supplies, including diesel generators and batteries, by moving them to higher ground or by placing them in watertight bunkers;
Establishing watertight connections between emergency power supplies and key safety systems; and
Enhancing the protection of seawater pumps (which were used to transfer heat from the plant to the ocean and to cool diesel generators) and/or constructing a backup means to dissipate heat.
Insufficient attention was paid to evidence of large tsunamis inundating the region surrounding the plant about once every thousand years.
Computer modeling of the tsunami threat was inadequate. Most importantly, preliminary simulations conducted in 2008 that suggested the tsunami risk to the plant had been seriously underestimated were not followed up and were only reported to NISA on March 7, 2011.
NISA failed to review simulations conducted by TEPCO and to foster the development of appropriate computer modeling tools.
Protecting emergency power supplies, including diesel generators and batteries, by moving them to higher ground or by placing them in watertight bunkers;
Establishing watertight connections between emergency power supplies and key safety systems; and
Enhancing the protection of seawater pumps (which were used to transfer heat from the plant to the ocean and to cool diesel generators) and/or constructing a backup means to dissipate heat.
