Revisedshvedoz99

NPP's Operational Safety Indicators in 1998 and 1999

Indicators	1999	1998
Load factor	64.5%	55.6%
Operational Events	88	102
Events on International Nuclear Event Scale (INES) See below	2 Events, level 1	1 Events, level 2 3 Events, level 1
Unplanned Unit Disconnection From the grid	24	26
Disconnection from the grid by Reactor Protection System Actuation (scram/unit)	0.52	0.34

International Nuclear Event Scale (INES)

The International Nuclear Event Scale (INES) is a tool to communicate to the public the safety significance of reported events at nuclear installations. By putting events into proper perspective, the Scale can establish common understanding among the nuclear community, the media, and the public.

Events are classified on the Scale at seven levels. The lower levels (1-3) are termed incidents, with no safety impact outside the site. The upper levels (4-7) are termed accidents. The Russian Federation experience in 1998 and 1999 corresponds to:

Scale 1 is an "Anomaly beyond the Authorized Operating Regime," but no worker exposure results
Scale 2 results in overexposure of a worker and partial failure of safety provisions, but no off-site consequences.