Laka Foundation

Publication Laka-library:
Operating experience with nuclear powerstations in member states in 1988 (1989)

AuthorIAEA
DateSeptember 1989
Classification 6.01.0.20/37 (IMPORTANCE WORLDWIDE)
Front

From the publication:

1. INTRODUCTION

This report is the twentieth in the Agency's series of annual reports on operating 
experience with nuclear power stations in Member States.
The report is a direct output from the Agency's Power Reactor Information System
(PAIS) whose databank contains all operating experience data published in the 
Agency's operating experience annual reports since 1971 and basic information 
on power reactors, including design data.
Load factor, operation factor and availability factor are used as basic performance 
factors. Energy unavailability factors, separate for planned and unplanned 
unavailability due either to causes in the plant or causes external to the plant, are 
used as a measure of energy lost through a unit not being available. However, some 
ambiguity remains in the operators' reports of the unavailability data, resulting in 
inconsistencies in these factors. It is recognized that there is an inherent difficulty 
in reporting unavailability in energy with relation to a maximum capacity which may 
be changing several times during the year. In addition, there are different practices 
in reporting planned and unplanned unavailability among Member States. The 
unavailability factors in this report should therefore be used with caution. It should 
be noted that, even for load, operation and availability factors, there may be 
differences between the data of this report and those published elsewhere. To 
avoid confusion, reference should be made to the definitions given in Section 3.
According to the information available to the Agency at the end of 1988, there 
were 429 nuclear power reactors operating in the world, with a total net capacity 
of 310 812 MW(e).

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