OECD-NEA WORKSHOP

1

• Introductory speech
• Mr Eric Mathet (OECD/NEA)
• "MASCA Seminar 2004"
• 10th 11th June 2004
• Aix-en-Provence, France

2
Special thankstoOrganizing Committee Members
and to the IRSN staff for its help with the
organization
3
To address the conditions under which molten core
material can be retained inside the reactor
pressure vessel (RPV) by cooling of the vessel
from outside
1994 - 1999

• OECD - RASPLAV
• the corium melt behaved comparably to the
  simulant material in its natural circulation,
  therefore previous evaluations based on simulant
  material data could be scaled to prototypic
  reactor conditions
• BUT ...

• OECD - MASCA
• Sufficient knowledge of fission product spatial
  and chemical distributions in the melt pool as
  well as prototypic liquid corium stratification
  is lacking. Well-designed experiments obtained
  with corium compositions prototypical of power
  reactors was supposed to provide the technical
  support for assessments of the in-vessel melt
  pool retention strategy as well as of ex-vessel
  phenomena.

2000 - 2003
OECD MASCA2 The influence of an oxidizing
atmosphere and the impact of non-uniform
temperatures (presence of crusts or solid debris)
is addressed in addition to scaling effects. The
program is also intended to generate data on
relevant physical properties of mixtures and
alloys.
2003 - 2006