Environmental Engineering Reference
In-Depth Information
Figure 5. Forming and displaying data about control rods positions
ceiving information on CR drop, as well as if due
to malfunction any group or separate CR starts
upward movement without command B↑, signal
forming cabinet forms and sends to the respective
channels of the first and second set of SHC E&PRP
signals initiating PRP-2 preventative protection
actuation. Data on CR drop are fixed in position
control channel of control rod position cabinet;
after pressing button “PRP-2 PICKUP” on control
and monitoring panel command is sent to signal
forming cabinet and from them to all position
control channels initiating reset of previously fixed
information and termination of signal forming,
which initiate actuation of PRP-2 (in Figure 5 is
not shown).
On base of data received from CR position
cabinet in every output signal forming channels
are continuously defined: vertical position of each
CR group in the core; number of main (work) and
auxiliary group while moving in the design order;
reaching by the moving group of upper or lower
(limit and intermediate) switch.
Group and individual control commands are
realized according scheme on Figure 6.
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