4

5

6

7

8

9

10

11

12

13

14

2.

2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2.

2.

2. 2. 2. 2. 2. 2. 2. 2.

2.

2.

2. 2. 2. 2.

2. 2.

the next Taisho era, the gaps between

1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1.

15

2.

2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2.

2.

2. 2. 2. 2. 2. 2. 2. 2.

2.

2.

2. 2. 2. 2.

2. 2.

the next Taisho era, the gaps between

1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1.

16

peo

3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3.

4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4.

373 18

17

peo

3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3. 3.

4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4.

373 18

18

19

20

3.

Is it dangerous?

Nuclear fusion, whose mechanism is fundamentally

different from nuclear fission adopted in power plants,

is of less risk. Concerning radiation, however, we

have to be alert to the following two points: One is

activation( ) of piles and another is resulted

tritium( ). Tritium is radioactive isotope of

hydrogen, which is very light and thus with ease spread

into the atmosphere. We need to consider these points

with care, as no technology guarantees absolute safety.

4.

How is it going?

The inventive projects of nuclear fusion power

generation started at the end of 1960s, the latest of

which is The 3rd Phase Basic Program of Fusion

Research and Development in 1992. Research has

three steps: (1) scientific possibility, (2) scientific

and technological possibility, (3) technological proof

and economic possibility. Now we are at the second

step, examining whether we can really achieve such a

technology that now is only theoretically simulated.

So as to answer the question, a project called ITER

project, where Japan, European nations, America,

Russia, China and India cooperate to construct an

experimental reactor, is now ongoing

5.

When did it start?

Japan launched its invention project at the end

of 1960s. The plan to achieve nuclear fusion through

international cooperation began in 1985, when

Gorbachev and Reagan made an agreement at the

U.S-Soviet Summit in Geneva, which derived from the

recognition that energy problems are common to all

human race and thus have nothing to do with the Cold

War.

6.

Is it really necessary?

Nuclear fusion has attracted much attention from

the economic and environmental viewpoints. Japan has

achieved its economic growth despite the shortage of

domestic-produced fossil fuel after WW2. This owes a

lot to scientific technologies, one of the most significant

of which is nuclear fission. If we can control the

technique of nuclear fusion, which goes one step ahead

of nuclear fission, it brings considerable advantages to

Japan.

From the environmental point of view, global

warming and accompanied climate changes can never

be ignored. So as to prevent them we need to restrict

carbon dioxide emissions, and nuclear fusion, emitting

no CO2, would play a vital role.

( )

( )

copyright(c) 2014 JAXA All Rights Reserved

21

3.

Is it dangerous?

Nuclear fusion, whose mechanism is fundamentally

different from nuclear fission adopted in power plants,

is of less risk. Concerning radiation, however, we

have to be alert to the following two points: One is

activation( ) of piles and another is resulted

tritium( ). Tritium is radioactive isotope of

hydrogen, which is very light and thus with ease spread

into the atmosphere. We need to consider these points

with care, as no technology guarantees absolute safety.

4.

How is it going?

The inventive projects of nuclear fusion power

generation started at the end of 1960s, the latest of

which is The 3rd Phase Basic Program of Fusion

Research and Development in 1992. Research has

three steps: (1) scientific possibility, (2) scientific

and technological possibility, (3) technological proof

and economic possibility. Now we are at the second

step, examining whether we can really achieve such a

technology that now is only theoretically simulated.

So as to answer the question, a project called ITER

project, where Japan, European nations, America,

Russia, China and India cooperate to construct an

experimental reactor, is now ongoing

5.

When did it start?

Japan launched its invention project at the end

of 1960s. The plan to achieve nuclear fusion through

international cooperation began in 1985, when

Gorbachev and Reagan made an agreement at the

U.S-Soviet Summit in Geneva, which derived from the

recognition that energy problems are common to all

human race and thus have nothing to do with the Cold

War.

6.

Is it really necessary?

Nuclear fusion has attracted much attention from

the economic and environmental viewpoints. Japan has

achieved its economic growth despite the shortage of

domestic-produced fossil fuel after WW2. This owes a

lot to scientific technologies, one of the most significant

of which is nuclear fission. If we can control the

technique of nuclear fusion, which goes one step ahead

of nuclear fission, it brings considerable advantages to

Japan.

From the environmental point of view, global

warming and accompanied climate changes can never

be ignored. So as to prevent them we need to restrict

carbon dioxide emissions, and nuclear fusion, emitting

no CO2, would play a vital role.

( )

( )

copyright(c) 2014 JAXA All Rights Reserved