A disposal site has also been proposed to be built to store ash after the debris is burned.

The compensation process is underway as TEPCO's president promised on Friday to expand compensation to include more homeless people.

Analysts said the tragedy may have been "preventable", as TEPCO should have protected the Daiichi plant's emergency power supplies by moving them to higher ground or by placing them in waterproof bunkers.

Even though the cooling device and diesel generators broke down, the plant should have utilized a prepared backup water container that requires no additional power or steam to cooldown the reactors "within the first hour and a half", said a researcher with Japan Atomic Energy Agency.

Moreover, Tokyo's failure to follow international safety standards and previous lessons of nuclear disclosures contributed to the accident, Washington-based think tank Carnegie Foundation said in a report on March 6.

Questions:

1. What magnitude was the earthquake?

2. How far is the ‘no-go-zone’ around the plant?

3. What did TEPCO’s president promise to expand on Friday?

Answers:

1. 9.0.

2. 20 km.

3. Compensation to include more homeless people.

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