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Abstract

This paper discusses the details concerning the newly developed or modified models of the computer program ALMOD-JRC, originating from ALMOD 3, Rel 4. The most important argument for the implementation of the new models was the need to enlarge the spectrum of the simulated phenomena, and to improve the simulation of experimental facilities such as LOFT or LOBI. This has led to a better formulation of the heat transfer and pressure drops correlations and to the implementation of the treatment of the heat losses to structural materials. In particular a series of test cases on real power plants, a pre-test examination of a LOBI station blackout ATWS experiment and the post test analysis of the LOFT L9-3 experiment, show the ability of ALMOD-JRC to correctly simulate PWR incident sequences. Although in ALMOD-JRC the code capabilities have been expanded, the limitations of the original version of the program still hold for what concerns the treatment of the coolant thermohydraulics as homogeneous flow for the two phase conditions in the primary circuit.

Additional information

Authors: CACCIABUE P C JRC ISPRA ESTAB. (ITALY) LISANTI B EDRA, MILANO (ITALY) TOZZI A MATEC, MILANO (ITALY) , JRC ISPRA ESTAB. (ITALY);EDRA, MILANO (ITALY);MATEC, MILANO (ITALY)
Bibliographic Reference: EUR 9422 EN/I (1984) MF, 100 P., BFR 240, BLOW-UP COPY BFR 500, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989123018600 / Last updated on: 1987-01-01
Category: PUBLICATION