The Fukushima Event: The Outline and the Technological Background

Table 6

Radioactivity inventory released to containment and reactor building of Fukushima Units 1 to 4.

Item	RC–NPP Unit No.			SFP–NPP Unit No.
	1	2	3	1	2	3	4
Noble Gases	2.49*	3.42*	3.42*	0.06°	0.17°	0.14°	0.34°
Halogens	2.67*	3.67*	3.67*	3.0e10	8.8e10	7.4e10	18.1e10
Alkali Metals	0.11*	0.15*	0.15*	1.08°	3.18°	2.64°	6.46°
Tellurium	1.85*	2.55*	2.55*	0.001°	0.003°	0.003°	0.006°
Barium-Strontium	0.22*	0.29*	0.29*	0.003°	0.008°	0.007°	0.016°
Noble Metals	0.67*	0.92*	0.92*	1.6e12	4.9e12	4.1e12	10.e12
Lanthanides	0.002*	0.003*	0.003*	1.2e11	3.5e11	2.9e11	7.2e11
Cerium	0.006*	0.008*	0.008*	1.4e11	4.3e11	3.5e11	8.7e11
TOTAL/RC & SFP Units	8.01*	11.0*	11.0*	1.14°	3.36°	2.79°	6.82°
TOTAL/RC & SFP	0.29e20			0.014e20
TOTAL	0.30e20 Bq [= 0.3e8 TBq = 0.81e9 Ci]

*e18; °e17.