Immobilisation of Higher Activity Wastes from Nuclear Reactor Production of ⁹⁹Mo

Table 1

Typical ILLW from alkaline-route ⁹⁹Mo production at ANSTO > 10 years after production.

Chemical composition		Main nuclides present	Half-life	Typical activity in ILLW waste (Bq/L)
NaOH	4–6 M	^137Cs	30.07 y	1𝐸+10
NaAlO2	1–1.5 M	^137mBa	2.552 m	1𝐸+10
Corrosion products		^90Sr	28.78 y	5𝐸+08
Fe, Cr, Ni	Traces	^90Y	64.1 h	5𝐸+08
		^147Pm	2.6 y	1𝐸+08
		^125Sb	2.77 y	1𝐸+07
		^134Cs	2.07 y	9𝐸+6
		^155Eu	4.96 y	1𝐸+07
		^106Rh	29.92 s	3.5𝐸+06
		^106Ru	1.02 y	3.5𝐸+06
		^125mTe	58 d	3𝐸+06
		^99Tc	213000 y	3𝐸+04