Tag Archives: model

Scrutiny of evacuations continues

This week the Wall Street Journal published a cluster of frontpage stories (here and here, along with video content) about the evacuation mishaps and tragedies in the wake of the Fukushima Daiichi nuclear incident.  In “How Japan Stumbled in Forecasting … Continue reading

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Special scientific session on “Fukushima Crisis: Air & Sea Transport Modeling”

An upcoming special session at the 15th Annual George Mason University Conference on Atmospheric Transport and Dispersion Modeling will focus on the Fukushima nuclear power plant crisis.  On the schedule are scientists from NRC, DTRA, NRL, NOAA, Japan Atomic Energy Agency, … Continue reading

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Plume forecasts and crisis management

The Daily Yomiuri has an on-going series on the nuclear crisis where today they describe the impact of delays in releasing data.  In one instance, a community near the plant was evacuated in the early hours of March 12 to a … Continue reading

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Release of data by government continues

Japanese officials continue to come under attack for their failure to fully release data related to the radiation contamination – both radiation measurements and additional overlooked plume forecasts.  The high radiation measured on the ground 30-50 km from the reactor … Continue reading

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Redundant measures and safety scenarios

One of the reasons given by the Japanese government for the delay in generating plume forecasts is that their model system, SPEEDI, was hardwired to receive radiation data at the Fukushima nuclear plant site.  When the sensors failed in the … Continue reading

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Update on the release of plume forecasts by the Japanese government

Last week the Japan Nuclear Safety Commission (NSC) began releasing plume forecasts. The plots show where radiation would go if an incident were to occur in the future, and also display the past forecasts covering the time period since the … Continue reading

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Which reactor event caused the radiation plume toward the northwest?

There has been speculation that the most extreme release of radiation was associated with fires in the fuel pool of reactor 4. The wind and plume maps below support this hypothesis. The aerial radiation mapping conducted March 17-19 by the … Continue reading

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Japan nuclear agency to release plume forecasts

The Japan Nuclear Safety Commission (NSC) has been criticized for not releasing its airborne plume forecasts as the Fukushima incident unfolded.  At first the agency claimed that its computers were down and so it was not able to generate forecasts. … Continue reading

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Update on ocean plume off Japan

The latest ocean plume validation plots from the University of Toulouse’s SIROCCO model are averaged over 7 days and encapsulate more observations than before.  In the week ending April 18 the radiation values were on the decline from the prior week. … Continue reading

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Radiation-detecting robots

Today the deployment of several small, agile robots (built by iRobot) to explore the Fukushima reactor buildings confirmed the expectation of very high radiation levels there.  The application of robots to this type of exploration and monitoring represents the forefront of … Continue reading

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