When an emergent reactor accident is considered to be growing
towards a condition that might affect the area surrounding the
plant, the technical advisory team will be summoned by the Government.
To support mitigating activities of the technical advisory team,
the computer-aided support system, COSTA, is being designed and
developed. COSTA displays will immediately respond to demands,
mainly requests for necessary information about the internal state
of the plant in question, by utilizing the knowledge base on the
plant status and the plant specification data base.
Illustrated in Fig. 4-6, are windows of COSTA with displayed information.
The extensively improved knowledge base has made it possible to
estimate the state of confinement of fission products and the
release rate of fission products into the environment under severe
accident conditions. |
