Monthly Archives: March 2011

News Updates, March 30

News Brief, 3/30/11 Plutonium Found in Soil Soil samples collected from five locations around the Fukushima Daiichi site were found to contain trace amounts of plutonium. These trace amounts are in roughly the same quantities as the amounts left behind … Continue reading

Posted in Fukushima

message from mitnse

Many thanks to everyone who has been visiting our blog and sending us questions and comments since we started up a little over two weeks ago. Now that information on the situation at the Fukushima Daiichi power plant is becoming … Continue reading

Posted in Uncategorized | 2 Comments

News Updates, March 26

Plant Status The IAEA has shared that as of 05:15 UTC, Japanese authorities reported the following about the conditions of the six reactors: Unit 1: Workers have restored lighting in the control room, and recovered the ability to use some … Continue reading

Posted in Fukushima

Status Update as of 3/22/2011

Heightened discharges as pump truck arrives 22 March 2011 Researched and written by World Nuclear News ORIGINALLY PUBLISHED: 1.08pm GMT UPDATE 1: 4.01pm GMT, Connection of power to unit 3 Discharges to sea from Fukushima Daiichi have shown increased levels of … Continue reading

Posted in Fukushima

Fission Products and Radiation

When a heavy atom (such as uranium or plutonium) undergoes fission, it splits into two lighter fission products. This splitting process also yields two or three neutrons, which can cause other heavy atoms to fission, as well as a huge … Continue reading

Posted in Basics

Status Update – 3/20/11 at 3:30 pm EDT

Stabilisation at Fukushima Daiichi 20 March 2011 FIRST PUBLISHED 2.05pm GMT UPDATE 1: 2.56pm GMT Units 5 and 6 in cold shutdown, tsunami heights UPDATE 2: 3.30pm GMT IAEA graph of fuel pond temperatures Workers on site have succeeded in … Continue reading

Posted in Fukushima

Status Update – 3/19/2011 at 10:00 am EDT

UPDATE AS OF 10 A.M. EDT, SATURDAY, MARCH 19 (per NEI): At a March 19 news conference, Japan’s Chief Cabinet Secretary Yukio Edano said that sea water injection is continuing at reactors 1, 2 and 3 at the Fukushima Daiichi … Continue reading

Posted in Fukushima

What is criticality?

The words “criticality” and “re-criticality” have been used extensively in the media coverage.  Criticality is a nuclear term that refers to the balance of neutrons in the system. “Subcritical” refers to a system where the loss rate of neutrons is … Continue reading

Posted in Basics

Plutonium in the Environment

Much recent news and many questions directed at the blog have centered around the detection of plutonium in soil and water surrounding the Fukushima reactors. This post will outline our current knowledge of the situation, as well as potential impacts … Continue reading

Posted in Radiation Protection

News update, 3/18

News Brief, 3/18/11, 10 AM EDT Spraying of spent fuel pools at Units 3 and 4 is still underway. Visual inspection of Unit 4’s pool showed water in the pool, and so efforts have been temporarily focused upon Unit 3. … Continue reading

Posted in Uncategorized