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Phebus-FP is an in-pile severe accident research programme, the first test being planned for early 1993. In each experiment a bundle of irradiated fuel rods plus control rod will be extensively degraded in a steam or hydrogen/helium flow, and the emitted fission products will pass through a simulated portion of a PWR primary circuit to a vessel simulating the containment building. In order to arrive at a detailed design for the facility and operating parameters for the first tests, an extensive programme of precalculations has been launched. This paper first explains the general objectives and the test matrix of the Phebus-FP programme, the strategy adopted to manage the precalculations and the coming post-test analyses, then reviews the calculational work done for the preparation of the first two tests. The structure of the pre-calculation programme is presented, leading through a reference case, sensitivity studies and continuous dialogue with the experimental team to a final set of operating instructions for the complete experiment. Some typical results are given to illustrate the process.

Additional information

Authors: ADROGUER B, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);MAILLIAT A, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);JONES A V, JRC Ispra (IT);SHEPHERD I, JRC Ispra (IT)
Bibliographic Reference: Paper presented: The Third Workshop on Severe Accident Research in Japan, Tokyo (JP), Nov. 4-6, 1992
Availability: Available from (1) as Paper EN 37213 ORA
Record Number: 199310109 / Last updated on: 1994-11-29
Original language: en
Available languages: en