NISA and METI assumed early SPEEDI reports useless – Early data erased after the accident

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Japanese news reports have now reported that immediately after the Fukushima Daiichi nuclear disaster last March, the Japanese government used the SPEEDI assessment system, which tracked the displacement of radionuclides from the crippled reactors, and subsequently erased the images without storing any backups.

According to the Disaster Prevention and Countermeasures Headquarters, the e-mail that was sent from the Nuclear Safety Technology Center was unable to transmit all of the data, and even the data that was transmitted “was not understood”.

After the initial problems with e-mail, more transmissions were attempted by fax on March 13th, however NISA and METI assumed that they were useless and could not be based realistic emission data.  The two government agencies did not share the data with residents or local government officials at the time.

Fukushima SPEEDI Data

Last Updated March 21, 2012

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