SU473220A1 - Power control device for nuclear power reactor - Google Patents

Description

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When the tolerance of the neutron flux ypoin ypoinisi is exceeded, at the output of the relay regulator 7, a control clue appears, which does not connect the key 5 to the open (foam conductor) state, which prohibits the effect of the pressure tori tor to increase the reactor's network. This function is always executed, regardless of the disconnection of the HL1.

In the initial state, when all the MCPs are working, the output of the blocks 12 is “O, the output of element 21 is“ 1, element 19 is “O (unloading is not produced), element 16 is“ O, element 17 is “1, 18 - "O. The state of the remaining elements (13, 14, 15, 20) is indifferent.

When one (any) MCP is disconnected, but a signal from the MCP operation monitoring sensor (based on the use of contactors of an actuator, or a power relay, or a coolant flow rate relay, or a MCP speed sensor) triggers a logic unit 12, for example, "1 of l . The output signal of block 12 is transferred to the state of "O logical element 21. The output signal of block 12, after passing through the input of block 10, changes its output signal.

When a neutron note exceeds a new value of the allowable level at the output of the regulator 7, a control signal appears, which translates the key 5 into the open state (with zero output signal) and translates the element 13 into a bullet state, so that at one input Element 19 appears to be a zero signal. Since the zero signal at the third input of the element 19 was in the initial state (from the output of element 18), the block 19 is not restored to the single state, the signal passes through the block b to the output of the device. The reactor unloading begins, which continues until the single signal is received at one of the inputs of element 19.

Other logic elements, ensuring the single discharge of the reactor when the loop is disconnected, work in the following way. The zero signal from the output of the key 5 after its transfer to the open state is passed to the input of the element 20, so that all its inputs have zero signals (at the other input, the zero was in the initial state), and the element 20 is transferred to the single state. In this case, a memory is generated on elements 18 and 20. Their state becomes indifferent to the signal at the input of element 18 from the output of element 17. The state of these elements is further changed only when a single signal appears from the output of key 5 at the input of element 20 under the condition of a zero signal from the output of element 17 at the input of element 18.

Element 14 is transmitted by a zero signal of element 13 to a single state, and element 15 is transferred to a zero state by a single signal of element 14. The location of the left signals at both inputs of the element

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16 translates it into a single state. This unit from the glide of element 16 arrives but is not the reverse link to the second input of element 15. At elements 15 and 16 it is “there. The resulting state of their stannomest indifferent to further. changes in the signal of e.chement 14, until a single signal is removed from the output of element 21. Accordingly, by a single signal of element 16, element 17

not reset to zero state.

The unloading of the reactor continues until the norm until the reactor capacity becomes less acceptable. The signal from the output of the regulator 7 is removed, element 13 is translated

in a single state, element 19 — into zero and unloading of the reactor is stopped; The zero signal of the regulator 7 transfers the key 5 to the conducting state. Shere ialichii or appearance at the output of the Bolpta regulator 1

a single signal element 20 is converted to zero, and element 18 is converted to a single state. This state of elements 20 and 18 also has a memory. It does not change when the signals from the key exit change.

5 PA input element 20, and can be changed only by the output signal of the element 17.

Thus, the single signal of element 18 is cranked 1, unloading the reactor until the initial state of the circuit elements is restored, which will only happen when the disconnected HZN.

The elements of the second and third circuit work similarly with the subsequent disconnection of the second and third MCP.

When two MCPs are disconnected simultaneously from all the working units, 12 «1 of and 2 2 of / g, as well as elements of the first and second penalties, are triggered simultaneously in the considered sequence.

With the increase in the reliability of the device, the controllers 1 and 7 can be made multichannel with output blocks "m from p.

Possible variant of the device in which

the output of the element 13 is also connected to the input of the element 20. In this case, the connection of the output of the block 5 to the input of the element 20 can be saved or eliminated. This device is denigrated once

unloading reactor.

The subject is invented and

. A power control device for a nuclear power reactor containing a pressure carrier controller with a logical NLP unit and an adjustable key, a discharge and power control controller with a task adjustment unit, at least one coincidence unit, and control pumps for circulating pumps, differing from that that, in order to reduce the self-oscillations in the transitional regime, associated with a decrease in pressure, by eliminating the repeated switching on of the regulator

unloading and power limiting, at least one circuit is inserted, which contains nine OR-NOT logical blocks, seven of which are connected in series between the output of the unloading and power limiting controller and the logical OR block, the output of the fourth block OR -IE is connected to the second input of the third block, the second input of the sixth block is connected to the output of the eighth block, the first input of which is connected to the output of the sixth block.

the second input is connected to the output of the controlled key, the second input of the seventh block is connected to the output of the first block, and the output of the ninth block is connected to the second input of the fourth and third input of the seventh block, the input of which is connected to the output of the corresponding coincidence block.

2. Device but p. 1, characterized in that in each circuit of logical blocks "OR-NOT the output of the first block is connected to the third input of the eighth block of its own circuit.

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