[CarryaBigStick]

I understand all four reactors are each rated in the 400-500 megawatt output range.

[ecomcon]

Megawatts electical output is not reactor heat, which is what he is looking for. Further, I understand that residual heat is in the 3 percent range for some time. Could be wrong though.

[globelamp]

Here are the reactors at Fukushima Dai-Ichi:

1 × 460 MW (Unit 1 damaged)
4 × 784 MW (Units 2, 3, and 4 damaged; Unit 5 experiencing cooling problems)
1 × 1,100 MW (Unit 6 experiencing cooling problems)

[meyer]

I understand all four reactors are each rated in the 400-500 megawatt output range.

Fukushima I units:

Unit 1, 460 MW, GE, 1971
Unit 2, 784 MW, GE, 1974
Unit 3, 784 MW, Toshiba, 1976 (MOX)
Unit 4, 784 MW, Hitachi, 1978
Unit 5, 784 MW, Toshiba, 1978
Unit 6, 1100 MW, GE, 1979

All are BWR design, unit 1 is designated BWR-3, Unit 6 is designated BWR-5, and the rest are designated BWR-4. I don't know major the differences between these, though they are all second generation designs. The BWR-3 (unit 1) had a mark I containment structure. The BWR-4 may have Mk I or MK II containment structures, and the BWR-5 (unit 6) probably has a Mk II containment structure.