Operational performances of LWR units have been analysed.
The load factor has been used as the basic measurement in
quantifying operational performances of LWR units.
The whole operating history, in the sense of the annual
and cumulative load factors achieved by all Western
commercial PAR and AIR units until the end of 1984 has
been taken into consideration. Furthermore, a set of the
annual load factors available from the WWER units of the
CMEA countries is given but is not included in the
ordinary data base of the study.
Many publications and journals give only general averages
of the load factors, or of some other availability
relates quantities, with the aid of which they seek to
represent nuclear power performances. The generic load
factor averages, however, conceal wide variations from
unit to unit and from year to year.
Through the regression analyses some contributing factors
(the unit size, vintage and age) have been found that
interacting with each other correlate with nuclear power
performance. Accordingly some trends in the operational
performance of LWR plants have been identified.
Furthermore, the annual load factors of duplicate units
have been compared with those of their predecessors at
the same nuclear power site.
The LWR units supplied by different contractors and/or
located in different countries font an inhomogeneous
population with respect to the achieved load factors,
i.e., the load factors of LWR units supplied by some
contractors and/or located in certain countries deviate
clearly and regularly from general load factor averages.
The U.S. units and the units supplied by U.S. contractors
to other countries are especially influential on load
factor averages of LWR units.
Some estimates for future load factors have been made
based only on the load factor trends established by PWR
and WAR units up to date. It was a delibrate aim to find
regression equations, in which the current "Finnish
factors", or the Soviet Atomenergoexport and the Swedish
ASEA-Atom (as the reactor contractors) and Finland itself
(as the site country), could be included; and through
which the future load factor trends in Finnish PWR and
BWR units could be predicted.
|Place of Publication||Espoo|
|Publisher||VTT Technical Research Centre of Finland|
|Number of pages||99|
|Publication status||Published - 1985|
|MoE publication type||D4 Published development or research report or study|
|Series||Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports|
- nuclear power
- light water reactors
- trend analysis
- performance analysis