Tuesday, July 2, 2013

Highly Radioactive Piece Emitting 3,400 Microsieverts/Hour (Beta/Gamma) Surface Radiation Found in Naraha-machi in #Fukushima During Decontamination Work to Return Residents


The town was designated as "no-entry" zone until August 10, 2012. The area where this tiny piece, with surface contamination of more than 100,000 cpm (meaning their survey meter went overscale), according to TEPCO, was found is currently designated as "Area preparing for the lifting of the evacuation order" (i.e. residents can return).

The 3 x 1.5 x 0.5 centimeter piece was found during the decontamination work being carried out by the national government.

Again, true to form for TEPCO/national government, the piece was found on June 20. The Ministry of the Environment asked TEPCO to analyze the piece on June 21. The piece was brought to Fukushima I Nuclear Power Plant for analysis on July 1. Announcement of the finding was on July 2.

I suppose TEPCO was trying to find a suitable container to carry the piece, for 10 days.

From TEPCO's Photos and Videos, 7/2/2013:

(Click to enlarge)



TEPCO's document above says:

The piece was found on the riverbed of Ide River in Naraha-machi at the river mouth, by the Ministry of the Environment on June 20. The decontamination crew was conducting the survey of radiation levels prior to decontamination, and found a hot spot on the riverbed, and collected this piece.

Surface radiation levels:

Gamma: 105 microsieverts/hour
Beta and gamma: 3,400 microsieverts/hour


Radiation levels at 30 centimeters:

gamma: 23 microsieverts/hour
Beta and gamma: 26 microsieverts/hour


Surface contamination: exceeding 100,000 cpm


The river mouth of Ide River is about 15 kilometers from Fukushima I Nuclear Power Plant.

Devastation in Naraha-machi, to the Ide River river mouth, video taken on the day the "no-entry" zone designation was lifted on August 10, 2012:

6 comments:

Darth 3.11 said...

Spooky as can be. I suppose that was the crane and Fukushima's npp that he focused on at the beach? Looked more like a lighthouse. Very eerie. A bit off topic, but how did the photographer keep the camera so smooth while cruising down the twisting, overgrown road?

Anonymous said...

Thanks very much for this report. Will they be able to report on which radioactive isotopes were found? I wonder if this is a fragment from the 2nd (and very huge) explosion at Fukushima Daiichi, and is possibly a core or spent fuel pool fragment, just like very hot core fragments found after the Chernobyl reactor exploded.

arevamirpal::laprimavera said...

I'm starting to think this is yet another "radium from several decades ago". The one in Setagaya-ku was emitting 40 millisieverts/hour radiation. http://ex-skf.blogspot.com/2011/11/setagaya-tokyos-high-radiation.html

If it was a core or spent fuel fragment, I would think the gamma radiation alone would be much, much higher, in high millisieverts if not sieverts.

Mike said...

Watch the video.

NY UltraBuddha said...

Is there any indication what this is a piece of? Is it dirt? Concrete? Can something of that size and weight actually travel that far in an explosion? Does the other end of the river go near the plant itself?

Anonymous said...

According to an article cited by prof. Takeda Tepco is saying that there is a high chance it is coming from Fuku 1

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