Exploratory circuit calculations for the first test of the Phebus-FP project
The aim of the international programme Phebus-FP is to investigate in an in-pile facility, under prototypical LWR severe accident conditions, the transport and retention of fission products. This paper presents the results of exploratory calculations related to aerosols and fission product transport in the circuit of the first Phebus-FP test to be performed at CEN, Cadarache (France). Calculations were performed to verify the design of the model circuit, to define the system operating conditions such as temperatures and flow rates, and support the design and operation of the measuring instruments. The results obtained show that the volatile fission products (iodine and caesium) are transported as vapours up to the entrance of the steam generator and are then retained by vapour condensation and aerosol deposition in the remainder of the circuit. The values of the transmission factor for aerosols and fission products differ greatly from one code to another: from 18 to 84 % (iodine), from 14 to 62 % (caesium), from 0 to 75 % (tellurium) and from 8 to 73 % (aerosols). Differences between code results are partially explained.
Bibliographic Reference: Paper presented: 12th Annual Meeting of the American Association for Aerosol Research (AAAR), Oak Brook, Illinois (US), October 11-15, 1993
Availability: Available from (1) as Paper EN 37735 ORA
Record Number: 199311317 / Last updated on: 1994-11-28
Original language: en
Available languages: en