Environmental Engineering Reference
In-Depth Information
Figure 6. Reactor trip system
Figure 7. Reactor power control and limitation system
• Automatic and continuous regulation of re-
actor neutron power and/or pressure in the
main steam line of NPP power unit
turbine.
To increase the reliability of the protection
functions, output signals implement in a 2oo3
voting logic. If licensing schemes require, the
system can be designed in a 2oo4 configuration
with full reliability and quality compliance.
During the design phase of any specific RP-
CLS, divisional principles are implemented within
the control and protection functions. In order to
achieve high reliability and independences, dif-
ferent groups of protection functions are realized
in separate galvanically isolated subunits.
•
Control of reactor power at levels corre-
sponding to the range of NPP power unit
main licensing limitations, from start up
through full-power operation.
•
Fast-responding preventative protection
of the reactor (runback at 40-50% of full
power within 3 to 4 seconds).
Search WWH ::
Custom Search