Properties of zirconium alloys and their applications in light water reactors (LWRs) - Materials' Ageing and Degradation in Light Water Reactors - page 148

2200

Gadolinia rod
UO 2 rod

2000

1800

1600

1400

1200

1000

High Cu
pickup

Low Cu pickup

800

600

400

200

0 0 0 0 0 0 0 0 0 0
Nodular coverage (%)

90 100

4.58 Effect of extent of nodular coverage on copper bearing and
deposition (Marlowe et al ., 1985). Copyright 1985 by the American
Nuclear Society, La Grange Park, Illinois.

(b)

(a)

Micrograph
300×

Zr X-Ray map

￿ ￿ ￿ ￿ ￿ ￿

(d)

(c)

Z X-Ray map Cu X-Ray map

4.59 Copper-rich crud deposited in laminations (cracks) of zirconium
oxide. In the X-ray map, a light region indicates the presence of the
element in question (Marlowe et al ., 1985). Copyright 1985 by the
American Nuclear Society, La Grange Park, Illinois.