Exploratory circuit calculations for the first test of the Phebus-FP project
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). Such calculations were performed to verify the design of the model circuit, to help define the system operating conditions such as temperatures and flow rates, and to help 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 then are retained by vapour condensation and aerosol deposition in the remainder of the circuit (i.e. steam generator and cold line). The values of the transmission factor (mass at the circuit outlet/mass at the circuit inlet) for aerosol and fission products differ greatly from one code to another: from 18 to 84% (iodine), from 14 to 62% (caesium), from 0 to 76% (tellurium) and from 8 to 73% (aerosols). By neglecting the RAFT results, the agreement between code results is better for iodine and caesium: more than half of the release at the circuit inlet is transferred to the containment.
Bibliographic Reference: EUR 15702 EN (1994) 52 pp., free of charge
Availability: Available from Joint Research Centre, Publication Department, I-21020 Ispra (Va.) (IT)
Record Number: 199410699 / Last updated on: 1995-03-21
Original language: en
Available languages: en