Title

Pouring Of Molten Uo//2, Uc And Al//2O//3 In Sodium: Interactions And Debris; Theoretical Analysis.

Abstract

Molten UO//2, Al//2O//3/sodium interactions were obtained at intermediate scale, in the pouring mode of contact, without shock triggers, and at low temperatures (the fuels at melting point and sodium subcooled). These interactions were not energetic. They could be understood by using the boiling map of sodium. Two fuel fragmentation mechanisms were determined: sodium transition boiling which causes sodium vapor bubble collapses on fuel lumps. These in their turn cause fuel fragmentation into coarse, d OVER BAR greater than 1 mm, smooth, particles and thermal stress, or shrinkage, cracking which causes fracturing of these smooth particles on long term of approx. 3 s into a fractured debris, d OVER BAR less than 1 mm as found post mortem. With regard to TERMOS it was concluded that superheat explosions may well be expected in such a geometry.

Publication Date

9-1-1986

Publication Title

European applied research reports. Nuclear science and technology

Volume

7

Issue

4

Number of Pages

577-672

Document Type

Article

Personal Identifier

scopus

Socpus ID

0022774097 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0022774097

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