Science and Technology of Nuclear Installations / 2012 / Article / Tab 3

Review Article

The Fukushima Event: The Outline and the Technological Background

Table 3

Amount (approximate) of radioactivity stored in Fukushima Units 1 to 4 at the time of start of the event.

ItemRC-NPP Unit No.SFP-NPP Unit No.

FA no.4005485482925875141331
Irradiated FA no.1925594621127
Noble gases (Xe, Kr)2.49*3.42*3.42*0.06°0.17°0.14°0.34°
Halogens (I, Br)2.94*4.04*4.04*3.0e108.8e107.4e1018.1e10
Alkali metals (Cs, Rb)0.35*0.49*0.49*1.08°3.18°2.64°6.46°
Tellurium (Te, Sb, Se)2.45*3.36*3.36*0.05°0.15°0.13°0.31°
Barium-strontium (Ba, Sr)3.58*4.91*4.91*1.39°4.07°3.38°8.28°
Noble metals (Ru, Rh, Pd, Mo, Tc, Co)9.63*13.2*13.2*0.83°2.46°2.05°4.99°
Lanthanides (La, Zr, Nd, Eu, Nb, Pm, Pr, Sm, Y, Cm, Am)10.5*14.4*14.4*1.21°3.55°2.94°7.21°
Cerium (Ce, Pu, Np)29.2*40.0*40.0*1.45°4.27°3.54°8.67°
Total/RC & SFP Units61.1*83.8*83.8*6.07°17.85°14.82°36.26°
Total /RC & SFP2.29e200.075e20
Total2.37e20 Bq [= 2.37e8 TBq = 6.41e9 Ci]

*e18; °e17.

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