A Survey of the Chemical Environments for Activity in the Embrittlement of Zircaloy-2

WT Grubb; MH Morgan

doi:10.1520/STP36677S

SYMPOSIA PAPER Published: 01 January 1979

STP36677S

A Survey of the Chemical Environments for Activity in the Embrittlement of Zircaloy-2

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Thirty-five chemical elements and some of their compounds were tested for activity in the embrittlement of Zircaloy-2 at 573°K using constant extension rate tension tests. Besides iodine, which embrittles by stress corrosion cracking (SCC), five metals caused liquid metal embrittlement when dissolved in cesium. These were cadmium, zinc, yttrium, calcium, and strontium. The effect of cadmium was by far the most severe. Selenium and tellurium did not embrittle Zircaloy-2 by SCC. Of the embrittling metals, only cadmium is considered a likely contributor to the PCI (pellet-clad interaction) failure mechanism. The reasons for this conclusion are discussed.

Author Information

Grubb, WT

General Electric Corporate Research and Development, Schenectady, N.Y.

Morgan, MH

General Electric Corporate Research and Development, Schenectady, N.Y.

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Details

Developed by Committee: B10

Pages: 145–154

DOI: 10.1520/STP36677S

ISBN-EB: 978-0-8031-4749-2

ISBN-13: 978-0-8031-0601-7

A Survey of the Chemical Environments for Activity in the Embrittlement of Zircaloy-2

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