Scoping calculations to examine a strategy for the thermalhydraulic control of the PHEBUS-FP containment vessel during high humidity transients
During the Phebus-FP tests, realistic fission products and aerosols will be introduced into a containment vessel about five thousand times smaller in volume than the containment building of a full-scale light water reactor. The time that these fission products remain airborne depends on the amount of water vapour present in the atmosphere. At high humidities water vapour can condense onto the aerosol particles and enhance their settling. This paper describes a set of calculations made by various organisations, using state of the art computer programs, to predict the thermalhydraulic conditions prevailing inside the containment vessel. The calculations show that the proposed boundary conditions could well achieve the desired high humidities but that there are substantial differences in the precise conditions predicted. It is strongly recommended that the vessel in the Phebus tests should be pre-calibrated by a set of thermalhydraulic experiments.
Bibliographic Reference: EUR 14984 EN (1993) 62 pp., FS, free of charge
Availability: Available from Joint Research Centre, Publication Department, I-21020 Ispra (Va.) (IT)
Record Number: 199511380 / Last updated on: 1995-10-31
Original language: en
Available languages: en