Community Research and Development Information Service - CORDIS

Abstract

In support of the NET fusion reactor blanket design, large break experiments have been performed in the JRC facility BLAST. The aim was to study the behaviour of the thermal and chemical processes involved if a tube rupture should allow water to come into contact with liquid lithium-lead in the breeder of a fusion reactor. It was shown that mixing is the governing factor in the Pb-17Li/water interaction process. The depressurisation in the reaction vessel did not exceed the actual water injection pressure. However, with strong throttling between the vessel and the expansion system, the pressurisation phase was more rapid and the pressure higher. The maximum temperature increase near the tube bank did not exceed 180 C, even at 500 C melt temperature. The chemical reaction appears to be self-limiting, and due to the hydrogen generation and production of solid LiOH and Li(2)O, the melt is partially insulated against the water, reducing the risk of energetic vapour explosions. The case of small leakages may be very different from the above studies of large breaks.

Additional information

Authors: SAVATTERI C, JRC Ispra (IT);GEMELLI A, JRC Ispra (IT);KLEIH R, JRC Ispra (IT)
Bibliographic Reference: Paper presented: 14th Liquid Metal Boiling Working Group, Brasimone (IT), April 16-18, 1991
Availability: Available from (1) as Paper EN 36662 ORA
Record Number: 199210465 / Last updated on: 1994-12-02
Category: PUBLICATION
Original language: en
Available languages: en