Tag Archives: ocean

Typhoon threat at Fukushima reactor site

Typhoon Roke, the 15th typhoon of the season in the northwest Pacific, is passing in the vicinity of the Fukushima reactor site.  It has already left in its wake significant flooding in Nagoya (southwest of Tokyo) and on the western … Continue reading

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High radiation measured at reactor 1

Today radioactive steam emitting from reactor 1 was found to contain 3000-4000 millisieverts/hr of radiation.  The steam is attributed to the water pooling in the basement of reactor 1.  (This is reported to be the highest level measured in the … Continue reading

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Radiation levels in the ocean

Radiation concentrations in the ocean surface offshore of Fukushima have been dropping.  The latest validation work of the University of Toulouse’s SIROCCO model shows the spatial distribution of sampled and modeled surface radiation levels.  Validation plots are averaged over 7 … 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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Fukushima incident raised to highest crisis level (7)

This news warrants a brief post.  And I’m sure there will be more analysis on the topic in the hours to come.  But here is an excerpt of what NHK reports: “The Japanese government’s nuclear safety agency has decided to … Continue reading

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Tsunami debris poses maritime hazard in the Pacific

Debris fields, some reaching 70 miles long, are moving slowly across the Pacific in the clockwise rotating basin-scale subtropical oceanic gyre.  The debris aggregations will take several years to come ashore along the U.S. and Canadian west coast, although some of … Continue reading

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Status of ocean plume off Japan

Construction is underway on a fence to partially isolate discharging contaminated water being released into the ocean. The U.S. Navy requested detailed data from Japan regarding the size, composition, timing and sampling of the controlled radiation release into the ocean amid … Continue reading

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Plume forecast for Japan: 4/10

The plume is projected to expand inland and overlap a broad area of the east coast of Japan through the afternoon and evening of Sunday April 10 Japan Standard Time (JST). A WSJ story reports: “The government’s top spokesman, Chief Cabinet … Continue reading

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Validation of ocean plume simulation for Japan

Earlier, I posted about the SIROCCO model applied to the Fukushima radiation release.  Colleague Claude Estournel and her team at the University of Toulouse/CNRS have conducted an evaluation of their SIROCCO model results through April 3.  The key findings are … Continue reading

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