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Depleted Zinc for the Nuclear Industry

  • Zinc, depleted in the isotope 64Zn, is a product for the water chemistry of nuclear power plants (NPPs).
  • Depleted Zinc in the form of sintered Zinc Oxide Pellets is used in boiling water reactors (BWR).
  • Depleted Zinc in the form of Zinc Acetate is used in pressurized water reactors (PWR).
  • The aim of using Depleted Zinc is to reduce corrosion in the primary water circuit in order to reduce occupational radiation exposure for NPP personnel (possible reduction of collective dose rate is approx. 50 %).
  • Another goal is the reduction of the potential for stress corrosion cracking in PWRs.
  • American BWRs (mainly GE types) started with the use of Zinc Oxide in form of natural zinc. The residual dose uptake problem from the activation of 64Zn to 65Zn has been successfully avoided in the United States, Mexico and some European countries by using Depleted Zinc.

Specification

Depleted Zinc-64 in the form of Zinc Oxide Pellets

Physical Properties:

Material 64Zn Depleted Zinc Oxide in the form of sintered pellets
Zn-64 64Zn < 1 at%
Density > 4,77 g/cm³
Diameter 10 mm + 1mm
Length 10 mm + 1mm

Chemical Properties:

Form ZnO
Purity > 99,8 wt%

Impurities in μg/g

Ag ≤ 10
Al ≤ 50
As, Au ≤ 10
B, Ba, Be, Bi, Br ≤ 10
C ≤ 500
Ca, Cd, Ce, Cl, Co, Cr, Cs, Cu ≤ 10
Dy ≤ 10
Er, Eu ≤ 10
F, Fe ≤ 10
Ga, Gd, Ge ≤ 10
Hf ≤ 10
Hg ≤ 2
Ho ≤ 10
I, In, Ir ≤ 10
K ≤ 10
La, Li, Lu ≤ 10
Mg, Mn, Mo ≤ 10
N, Na, Nb, Nd, Ni ≤ 10
Os ≤ 10
P, Pb, Pd, PO4, Pr, Pt ≤ 10
Rb, Re, Rh, Ru ≤ 10
S, Sb, Sc, Se ≤ 10
Si ≤ 50
Sm, Sn, SO4, Sr ≤ 10
Ta, Tb, Te, Th, Ti, Tl, Tm ≤ 10
U ≤ 10
V ≤ 10
W ≤ 10
Y, Yb ≤ 10
Zr ≤ 10
Rare Earth ≤ 20
Insoluble ≤ 100
Remaining impurities ≤ 20

Depleted Zinc-64 in the form of Zinc Acetate Dihydrate

Physical Properties:

Material 64Zn Depleted Zinc in form of Zinc Acetate
Zn-64 64Zn < 1 at%
Particle Size < 1 mm

Chemical Properties:

Form Zn(CH3CO2)2(H2O)2
Purity  ≥ 99,8 wt%

Impurities in μg/g

Ag ≤ 10
Al ≤ 50
As ≤ 10
Au ≤ 20
B, Ba ≤ 10
Be ≤ 20
Bi, Br ≤ 10
Ca, Cd ≤ 10
Ce, Cl ≤ 20
Co, Cr ≤ 10
Cs ≤ 20
Cu ≤ 10
Dy ≤ 20
Er, Eu ≤ 20
F ≤ 20
Fe ≤ 10
Ga, Gd, Ge ≤ 20
Hf ≤ 10
Hg, Ho ≤ 20
I, In ≤ 10
Ir ≤ 20
K ≤ 10
La ≤ 20
Li ≤ 10
Lu ≤ 20
Mg, Mn, Mo ≤ 10
N ≤ 20
Na ≤ 10
Nb, Nd ≤ 20
Ni ≤ 10
Os ≤ 20
P, Pb ≤ 10
Pd, PO4, Pr, Pt ≤ 20
Rb, Re, Rh, Ru ≤ 20
S, Sb ≤ 10
Sc ≤ 20
Se ≤ 10
Si ≤ 50
Sm ≤ 20
Sn ≤ 10
SO4 ≤ 50
Sr ≤ 10
Ta, Tb, Te, Th ≤ 20
Ti ≤ 10
Tl, Tm ≤ 20
U ≤ 20
V ≤ 10
W ≤ 20
Y, Yb ≤ 20
Zr ≤ 20
Rare Earth ≤ 20
Insoluble ≤ 100
Remaining impurities ≤ 10
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