RU2310244C2 - Control device for nuclear-reactor actuating mechanisms - Google Patents

Abstract

FIELD: power reactor control and protection systems.

SUBSTANCE: proposed nuclear-reactor actuating-mechanism control device has n monitoring and control units, where n is number of nuclear-reactor regulation-element groups (for instant, 10 groups assigned for VVER-1000 reactors), group control switch, and voltage supply. Each of monitoring and control units has its first input connected in addition to fourth input of majority unit and second input connected in addition to fourth input of second majority unit. Newly introduced in each majority unit is seventh controllable switch whose input is connected to output of fourth controllable switch and output, to that of majority unit and control input, to fourth input of majority unit.

EFFECT: reduced number of reactor regulation elements simultaneously moved on operator's command which enhances reactor safety in operation.

1 cl, 3 dwg

Description

The invention relates to the field of control systems and protection of nuclear power reactors.

A known position sensor of a regulatory body of a nuclear reactor containing a shunt rigidly connected to the regulatory body, indicators of the position of the shunt, evenly spaced along the axis of movement of the shunt, and the shunt is made of magnetic and non-magnetic spacers with a total length equal to the stroke of the shunt (Patent of the Russian Federation No. 2073917, C. G21C 7/14, 7/36, 1997).

The position sensor, as the regulatory body moves, produces a code combination of the position of the adjustable body, removed simultaneously from all position indicators, respectively, by closing or opening by magnetic and non-magnetic spacers of the shunt of the magnetic circuits of the position indicators.

This sensor is used in modern systems of control and protection of VVER-1000 reactors.

The closest in technical essence is a control device for the executive mechanism of a nuclear reactor, containing n control and control devices, where n is the number of groups of regulatory bodies of a nuclear reactor, adopted, for example, for VVER-1000 reactors equal to 10, a group control key, a voltage source, the first input of the first monitoring and control device is connected to the input of the group control key, the output of the voltage source and the second input of the n-th (tenth) monitoring and control device, the first output The group control unit is connected to the third inputs of all n control and control devices, the second output of the group control key is connected to the fourth inputs of all n control and control devices, the second input of the m-th control and control device for all m varying from 1 to n-1 (9), connected respectively to the second output of the monitoring and control device with number m + 1, the first input of the mth monitoring and control device for m, varying from 2 to n (10), connected respectively to the first output of the monitoring and control device with number m-1, each control and control device contains at least the first, second and third position sensors of the regulatory bodies of the nuclear reactor, the first, second and third position control units, the first and second majority blocks, from the first to the sixth circuit NOT, with the first to the sixth circuit And, with the first, second and third position sensors of the regulatory bodies of the nuclear reactor connected respectively to the first, second and third position control units, the first output of the first position control unit is connected through the first circuit E with the first input of the first circuit And, the first output of the second position control unit is connected via the second circuit NOT to the first input of the second circuit And, the first output of the third position control unit is connected through the third circuit NOT to the first input of the third circuit And, the fourth output of the first position control unit connected through the fourth circuit NOT to the first input of the fourth circuit AND, the fourth output of the second position control unit is connected through the fifth circuit NOT to the first input of the fifth circuit And, the fourth output of the third position control unit is connected cut the sixth circuit NOT with the first input of the sixth circuit AND, the first input of the control and control unit is connected to the third inputs of the first, second and third circuits And the second input of the control and control unit is connected to the third inputs of the fourth, fifth and sixth circuits And, the third input of the block control and management is connected to the second inputs of the first, second and third circuits AND, the fourth input of the control and management unit is connected to the second inputs of the fourth, fifth and sixth circuits And, the first output of the control and management unit is connected to the output of the first majority block, the first, second and third inputs of which are connected to the second outputs of the first, second and third position control units, the second output of the control and control unit is connected to the output of the second majority block, the first, second and third inputs of which are connected to the third outputs of the first, second and the third position control units, the outputs from the first to the sixth circuits AND are connected respectively to the outputs from the third to eighth control and management units, each of the majority blocks containing a source voltage and six controlled keys, the output of the voltage source is connected to the inputs of the first, second and third managed keys, the outputs of the fifth and sixth managed keys are connected to the output of the fourth managed key, the output of the first managed key is connected to the input of the fourth managed key, the output of the second managed key is connected to the input of the fifth managed key, the output of the third managed key is connected to the input of the sixth managed key, the inputs of the majority block are connected first - to the control inputs of of the fifth and fifth controlled keys, the second - with the control inputs of the second and sixth controlled keys, the third - with the control inputs of the third and fourth controlled keys (Technical project "Electrical equipment complex VPS of the VVER-1000 (V-428) Tianwan NPP TAIK.500066.002 PZ ", NPP VNIIEM, 2000).

The disadvantage of this device is the possibility of simultaneous upward movement of several groups of regulatory bodies. So, when the regulatory bodies of the groups with odd numbers are located at the top, the “More” command will simultaneously move up to five groups of regulatory bodies with even numbers.

The essence of the invention lies in the fact that in the control device for the actuator of a nuclear reactor containing n control and control devices, where n is the number of groups of regulatory bodies of a nuclear reactor, taken, for example, for VVER-1000 reactors equal to 10, a group control key, source voltage, the first input of the first control and management device is connected to the input of the group control key, the output of the voltage source and the second input of the n-th (tenth) control and management device, the first output of the key group control is connected to the third inputs of all n control and control devices, the second output of the group control key is connected to the fourth inputs of all n control and control devices, the second input of the m-th control and control device for all m varying from 1 to n-1 ( 9), connected respectively to the second output of the monitoring and control device with number m + 1, the first input of the m-th monitoring and control device for m, varying from 2 to n (10), is connected respectively to the first output of the monitoring and control device with number m-1 k each monitoring and control device contains at least the first, second and third position sensors of the nuclear reactor control elements, the first, second and third position control units, the first and second majority blocks, from the first to the sixth circuit NOT, from the first to the sixth circuit And, the first, second and third position sensors of the nuclear reactor control elements are connected respectively to the first, second and third position control units, the first output of the first position control unit is connected via the first circuit NOT to by the first input of the first circuit AND, the first output of the second position control unit is connected through the second circuit NOT to the first input of the second circuit And, the first output of the third position control unit is connected through the third circuit NOT to the first input of the third circuit And, the fourth output of the first position control unit is connected through the fourth circuit is NOT with the first input of the fourth circuit And, the fourth output of the second position control unit is connected through the fifth circuit is NOT with the first input of the fifth circuit And, the fourth output of the third position control unit is connected via NOT circuit with the first input of the sixth circuit AND, the first input of the control and control unit is connected to the third inputs of the first, second and third circuits AND, the second input of the control and control unit is connected to the third inputs of the fourth, fifth and sixth circuits AND, the third input of the control unit and control is connected to the second inputs of the first, second and third circuits AND, the fourth input of the control and control unit is connected to the second inputs of the fourth, fifth and sixth circuits And, the first output of the control and control unit is connected to the output of the first majority block, the first th, the second and third inputs of which are connected to the second outputs of the first, second and third position control units, the second output of the control and control unit is connected to the output of the second majority block, the first, second and third inputs of which are connected to the third outputs of the first, second and the third position control units, the outputs from the first to the sixth circuits AND are connected respectively to the outputs from the third to eighth control and control units, each of the majority blocks containing a voltage source lives and six managed keys, the output of the voltage source is connected to the inputs of the first, second and third managed keys, the outputs of the fifth and sixth managed keys are connected to the output of the fourth managed key, the output of the first managed key is connected to the input of the fourth managed key, the output of the second managed key is connected to the input of the fifth managed key, the output of the third managed key is connected to the input of the sixth managed key, the inputs of the majority block are connected first - to the control inputs of the first fifth controlled keys, the second with control inputs of the second and sixth controlled keys, the third with control inputs of the third and fourth controlled keys, in each of the n control and control units, the first input is additionally connected to the fourth input of the first majority block, and the second input is additionally connected with the fourth input of the second majority block, an additional seventh controlled key is introduced into each majority block, the input of which is connected to the output of the fourth controlled key, the output is with the output of block, and the control input with the fourth input of the majority block.

Figure 1 shows a structural diagram of a control device for actuators of a nuclear reactor, figure 2 shows a structural diagram of a control and control device, and figure 3 shows a structural diagram of a majority block.

The control device for executive mechanisms of a nuclear reactor (Fig. 1) contains n control and control devices 1.1-1.n, where n is the number of groups of regulatory bodies of a nuclear reactor, which, for example, for VVER-1000 reactors is 10, a control and control device 1.1 contains the first 2.1.1, the second 2.2.1, the third 2.3.1 and the fourth 2.4.1 inputs, the first 3.1.1 output, the outputs from the third 3.3.1 through the eighth 3.8.1, the monitoring and control device 1.m contains the first 2.1.m, second 2.2.m, third 2.3.m and fourth 2.4.m inputs, outputs from the first 3.1.m to the eighth 3.8.m, where m - changes from 2 to n-1 (9), the monitoring and control device 1.n (1.10) contains the first 2.1.n, the second 2.2.n, the third 2.3.n and the fourth 2.4.n inputs, outputs from the second 3.2.n to the eighth 3.8.n, group control key 4 with input 5, first 6 and second 7 outputs, voltage source 8.

The output of the voltage source 8 is connected to the input 5 of the group control key 4, with the first input 2.1.1 of the first monitoring and control device 1.1 and the second input 2.2.n of the monitoring and control device n.

The first output 6 of the group control key 4 is connected to the third inputs 2.3.1-2.3.n of all monitoring and control devices 1.1-1.n, and the second output 7 of the group control key 4 is connected to the fourth inputs 2.4.1-2.4.n of all devices control and management 1.1-1.n.

In each of the monitoring and control devices 1.m, where m varies from 2 to n, the first input 2.1.m is connected to the first output 3.1.m of the monitoring and control device m-1, and in each of the monitoring and control devices m, where m varies from 1 to n-1, the second input 2.2.m is connected to the second output 3.2.m of the monitoring and control device m + 1.

The monitoring and control device 1.m (Fig. 2) contains at least the first 9.1, second 9.2 and third 9.3 position sensors of the nuclear reactor control elements, the first 10.1, second 10.2 and third 10.3 position control units with outputs from the first to the fourth 11.1. 1-11.4.1, 11.1.2-11.4.2, 11.1.3-11.4.3, respectively, for the position control blocks from the first 10.1 to the third 10.3, the first majority block 12 with inputs from the first 13.1 to the fourth 13.4 and output 14, the second majority block 15 with inputs from the first 16.1 to the fourth 16.4 and output 17, from the first 18.1 to the sixth 18.6 of the circuit NOT and from the first 19.1 according to the sixth 19.6 scheme I.

The first 9.1, second 9.2 and third 9.3 position sensors of the regulatory bodies of the nuclear reactor are connected respectively to the first 10.1, second 10.2 and third 10.3 position control units.

The first output 11.1.1 of the first position control unit 10.1 is connected through the first circuit NOT 18.1 to the first input of the first AND 19.1 circuit, the first output 11.1.2 of the second position control unit 10.2 is connected through the second circuit NOT 18.2 to the first input of the second AND 19.2 circuit, the first output 11.1.3 of the third position control unit 10.3 is connected through the third circuit NOT 18.3 to the first input of the third AND 19.3 circuit, the fourth output 11.4.1 of the first position control unit 10.1 is connected through the fourth circuit NOT 18.4 to the first input of the fourth And 19.4 circuit, the fourth output 11.4. 2 second control units 10.2 is connected via the fifth circuit NOT 18.5 to the first input of the fifth AND 19.5 circuit, the fourth output 11.4.3 of the third position control unit 10.3 is connected via the sixth circuit NOT 18.6 to the first input of the sixth circuit And 19.6.

The first 13.1, second 13.2 and third 13.3 inputs of the first majority block 12 are connected to the second outputs 11.2.1, 11.2.2 and 11.2.3 of the first 10.1, second 10.2 and third 10.3 position control blocks, respectively. The first 16.1, second 16.2 and third 16.3 inputs of the second majority block 15 are connected to the third outputs 11.3.1, 11.3.2 and 11.3.3, respectively, of the first 10.1, second 10.2 and third 10.3 position control blocks.

The first input 2.1.m of the control and management device is connected to the fourth input 13.4 of the first majority block 12 and the third inputs of the first 19.1, the second 19.2 and third 19.3 of the I circuit, and the second input 2.2.m of the control and management device is connected to the fourth input 16.4 of the second majority block 15 and the third inputs of the fourth 19.4, fifth 19.5 and sixth 19.6 circuits I.

The third input 2.3.m of the control and management device is connected to the second inputs of the first 19.1, second 19.2 and third 19.3 of the I circuit, and the fourth input 2.4.m of the control and management device is connected to the second inputs of the fourth 19.4, fifth 19.5 and sixth 19.6 of the circuit I.

The output 14 of the first majority block 12, the output 17 of the second majority block 15, the outputs of the circuits And from the first 19.1 to the sixth 19.6 are connected respectively to the outputs from the first 3.1.m to the eighth 3.8.m of the control and management device.

The majority block (figure 3) contains a voltage source 20 and controlled keys from the first 21 to the seventh 27, which are closed with a single signal at the control input of the corresponding key.

The output of the voltage source 20 is connected to the inputs of the first 21, second 22 and third controlled keys. The input of the seventh managed key 27 is connected to the outputs of the fourth 24, fifth 25 and sixth 26 of the managed keys.

The output of the first managed key 21 is connected to the input of the fourth managed key 24, the output of the second managed key 22 is connected to the input of the fifth managed key 25, the output of the third managed key 23 is connected to the input of the sixth managed key 26.

The inputs of the majority block are connected by the first 13.1 (16.1) - with the control inputs of the first 20 and fifth 25 managed keys, the second 13.2 (16.2) - with the control inputs of the second 22 and sixth 26 controlled keys, the third 13.3 (16.3) - with the control inputs of the third 23 and the fourth 24 managed keys, the fourth 13.4 (16.4) - with the control input of the seventh managed key 27, and the output 28 of the majority block is connected to the output of the seventh managed key 27.

For VVER-1000 reactors, groups of regulatory bodies contain from six to eighteen regulatory bodies. In the drawings (FIG. 1 and FIG. 2), in each group, the control equipment of three regulatory bodies is conventionally shown. The control equipment for the other triples is similar. In this case, the outputs of the first majority blocks of additional “triples” are connected to the first output 3.1.m, and the outputs of the second majority blocks of additional “triples” are connected to the second output 3.2.m of the monitoring and control device, which ensures the implementation of OR logic (wired OR) by signals corresponding majority blocks.

The control device of the actuator of a nuclear reactor operates as follows.

For VVER-1000 reactors, the height of the reactor core and, accordingly, the controlled movement of the reactor regulatory body is 350 cm. When, for example, the first regulatory body 9.1 of group m is located at the bottom of the reactor core at the fourth exit 11.4.1 of the first position control unit 10.1, appears a single signal of the “bottom end” of the SC, when this regulatory body is located at the top of the reactor core (at a height of 350 cm from the bottom of the core), a single signal appears at the first output 11.1.1 of the first position control unit 10.1 al "konechnika top" HF. In modern control systems, the formation of a single signal of the "intermediate top position" of the PV at the second output 11.2.1 of the first control unit 10.1 is also performed when the regulatory body is at the top of the reactor core, that is, simultaneously with the HF signal. The formation of a single signal of the "intermediate bottom position" of the PN at the third output 11.3.1 of the first control unit is performed when the corresponding regulatory body is located at a height of 175 cm or lower from the bottom of the reactor core.

When the reactor is stopped, all regulatory bodies of the reactor are located at the bottom of the reactor core. Moreover, in all monitoring and control devices 1.1-1.n of all control units 10.1-10.3, at the third inputs 11.3.1-11.3.3 there is a single PN signal, and at the fourth outputs 11.4.1-11.4.3 there is a single KN signal and accordingly, at the output 17 of the second majority block 15 there is a single signal supplied to the second output 3.2.m of the corresponding monitoring and control device 1.m as a group signal of the intermediate position of the bottom of the group m - "ПНm".

When the group control key of KGU 4 is turned to the left position, a single signal “More” is generated at its output 6 from voltage source 8, which is fed to the first inputs 2.1.1-2.1.n of all control and control devices 1.1-1.n.

The formation of the “More” commands will occur only for actuators that move the regulatory bodies of the first group, since at the second input 2.1.1 of the control and control device 1.1 there is a single signal from the voltage source 8. At the same time, the outputs of the first 19.1, second 19.2 and third 19.3 circuits And and, accordingly, on the third 3.3.1, fourth 3.4.1 and fifth 3.5.1 outputs of the control and control device 1.1, single signals appear respectively B.1.1, B.2.1, B.3.1 for 1-3 actuators providing upward movement 1-3 regulatory authority in until they reach the KB (and PV) position at the first 11.1.1-11.1.3 and second 11.2.1-11.2.3 outputs of the first 10.1, second 10.2 and third control units, which leads to the appearance of a single signal at the output 14 of the first majority unit 12 and, accordingly, a single signal PV1 at the first output 3.1.1 of the first monitoring and control device 1.1, from the third 3.3.1, fourth 3.4.1 and fifth 3.5.1 outputs of which single signals B.1.1, B.2.1 and B. are taken 3.1 as a result of removing signals from the first inputs and, accordingly, from the outputs of the first 19.1, second 19.2 and third 19.3 circuits I. Movement ervogo third-regulatory bodies of the first group up stops.

A single signal PV1 from the first output 3.1.1 of the first monitoring and control device 1.1 is fed to the first input 2.1.1 of the second monitoring and control device 1.2. If the “More” command is saved at the third input 2.3.2 of the second monitoring and control device 1.2, then the regulatory bodies of the second group are moved upward with the formation of signals in the monitoring and control device 1.2, similar to that described above for the monitoring and control device 1.1.

When the “More” command is saved, after the regulatory bodies reach the second group, the KB position ensures that the regulatory bodies of the third and subsequent groups move up to the tenth one by one, and the regulatory bodies of only one group move up. The upward movement of the regulatory bodies of the tenth group will cease when they reach the position of ToR.

When translating the group control key 4 to the right position, its output 7 receives a single signal "Less" from voltage source 8, which then goes to the fourth inputs 2.4.1-2.4.10 of all control and control devices 1.1-1.10, and to the second input 2.2.10 monitoring and control device 1.10 receives a single signal from the output of voltage source 8. In the monitoring and control device 1.10, single signals appear at the outputs of the fourth 19.4, fifth 19.5 and sixth 19.6 circuits I, and on the sixth 3.6.10, seventh 3.7.10 and the eighth 3.8.10 outputs of the control device and control Lines 1.10, respectively, the commands “Less” M1.10, M2.10 and M3.10 appear on the 1-3 actuators of the tenth group, which ensures the downward movement of the regulatory bodies of the 1-3 tenth group until they reach the position of the SC, which leads to the appearance of a single the KH signal at the fourth output of the corresponding control unit 10.1-10.3 and the removal of a single signal at the output of the corresponding circuit And 19.4-19.6 and, accordingly, the removal of the corresponding signals "Less" M1.10, M2.10, M3.10. Accordingly, the regulatory bodies of the tenth group stop moving down.

In the process of moving the regulatory bodies of the tenth group down when they reach the PN position, a single signal appears on the third outputs 11.3.1-11.3.3 of the corresponding control units 10.1-10.3 of the control and control device 1.10, and since the fourth input 16.4 of the second majority block 15 is present a single signal from the second input 2.2.10 of the monitoring and control device 1.10, then after the appearance of single signals at least at the two inputs of the second majority block 15, a single signal appears at its output 17 and, respectively, to the second 3.2.10 output monitoring and control device 1.10 PN10 unit signal appears which is supplied to the second input of 2.2.9 monitoring and control device 1.9.

When the “Less” command is saved from the output 7 of key 4 after the appearance of a single signal PN10 at the second input 2.2.9 of the monitoring and control device 1.9, the “Less” commands M1.9, M2.9, M3.9 are formed to move the regulatory bodies of the ninth group down until they reach the position of the SC, the PN9 signal is also generated similarly to that considered above for the control and management device 1.10.

In this case, the regulatory bodies of the ninth group and the regulatory bodies of the tenth group simultaneously move from the position of the PN to the position of the CN.

When the “Less” command is saved, as the PNm signal is generated in the monitoring and control devices 1.10-1.2, the groups of regulatory bodies are sequentially moved down from the tenth to the first, while the regulatory bodies of the two groups can simultaneously move.

Consider the situation when all regulatory bodies of groups 1–9 are located at the top of the reactor core (in the KB position), and the regulatory bodies of the tenth group are above the middle of the reactor core, for example, at a height of 200 cm from the bottom of the reactor core.

When the accelerated preventive protection of the UPZ reactor is triggered in VVER-type reactors, a fall of six regulatory bodies (two "triples") from the second group of regulatory bodies is currently provided. Moreover, the second group of regulatory bodies can contain either six or more (up to eighteen) regulatory bodies.

When the “Less” command is received from the output 7 of key 4, where it can be given when the key 4 is turned to the right position, or as a single signal of operation of the preliminary protection of the first kind P31 from the emergency and preventive protection system, the regulatory authorities of the tenth will move down in the situation under consideration groups of regulatory bodies. After the PN10 signal is generated, together with the regulatory bodies of the tenth group, the regulatory bodies of the ninth group of regulatory bodies will move. The regulatory bodies of the first group will not move down (as would happen in the prototype device), since the monitoring and control device 1.2 will not generate the PN2 signal due to the fact that at the second input 2.2.2 of the monitoring and control device 1.2 there is no single PN3 signal and, accordingly, there is no single signal at the fourth input 16.4 of the second majority block 15 and the key 27 in it is open.

When the “More” command is sent to the output 6 of key 4 by turning it to the left position in the considered situation after the UPZ operation, as applied to the reactor containing six regulatory bodies in the second group, only the regulatory bodies of the second group will move up until they reach the top of the active zone when KB and PV signals will be generated for these regulatory bodies. In this case, the signal PV2 appears on the first output 3.1.2 of the monitoring and control device 1.2. As a result, the PV3-PV9 signals appear at the first outputs 3.1.3-3.1.9 of the monitoring and control devices 1.3-1.9 and, with the “More” command, the regulatory bodies of the tenth group will move up.

When giving the command “More” to the output 6 of key 4 by turning it to the left position in the situation under consideration, after the UPZ has been triggered, as applied to a reactor containing in the second group more than six, for example, eighteen, regulatory bodies, not only the second, but also the regulatory bodies will move upwards and the tenth group, since due to the signals on the position of the regulatory bodies remaining after the SCL at the top of the reactor core, at the first output 3.1.2 of the monitoring and control device 1.2 a single signal PV2 will be generated . As a result, single signals PV3-PV9 are formed at the first outputs of the monitoring and control devices 1.1-1.9. Therefore, in the case under consideration, after the UPZ has been triggered, the rise of the fallen regulatory bodies should be carried out not by command of key 4, but by other means, for example, selecting the regulatory bodies for individual control and issuing the individual command “More” from the individual control key (not shown) .

A feature of the device is the development of the “More” command in a situation in which some of the groups of regulatory bodies of the first nine are not at the top of the active zone. In this case, the regulatory bodies of only one group of regulatory bodies will move up - with the smallest number of those not located at the top of the reactor core, since the control and management device of the regulatory bodies of this and subsequent groups with large numbers will not generate a PVm signal.

In the case when a part of the groups of regulatory bodies of the last nine are below the PN, the development of the Less command will be carried out by the regulatory bodies of the tenth group, if they have not reached the position of the SC, and by the regulatory bodies of all those groups m, in the control and management devices of which 1. m receives the signal PNm + 1.

For example, if the regulatory bodies of the tenth, ninth, seventh and sixth groups of regulatory bodies are located below the PN, then the development of the Less command will be carried out by the regulatory bodies of only the tenth, ninth and eighth groups.

Thus, in the device compared with the prototype, a decrease in the number of regulatory bodies of a nuclear reactor simultaneously moved by an operator’s command is provided, which increases the safety of operation of a nuclear reactor.

Claims (1)

A control device for the executive mechanism of a nuclear reactor, containing n monitoring and control devices, where n is the number of groups of regulatory bodies of a nuclear reactor, taken, for example, for VVER-1000 reactors equal to 10, a group control key, a voltage source, the first input of the first control device and control is connected to the input of the group control key, the output of the voltage source and the second input of the n-th (tenth) control and management device, the first output of the group control key is connected to the third moves of all n control and management devices, the second output of the group control key is connected to the fourth inputs of all n control and management devices, the second input of the m-th control and control device for all n varying from 1 to n-1 (9) is connected respectively to the second output of the monitoring and control device with the number m + 1, the first input of the m-th monitoring and control device for n, varying from 2 to n (10) is connected respectively to the first output of the monitoring and control device with the number m-1, each monitoring device and soda management at least the first, second and third position sensors of the nuclear reactor control organs, the first, second and third position control blocks, the first and second majority blocks, from the first to the sixth circuit are NOT, from the first to the sixth circuit And, and the first, the second and third position sensors of the control elements of the nuclear reactor are connected respectively to the first, second and third position control units, the first output of the first position control unit is connected via the first circuit NOT to the first input of the first circuit And, the first output is w The next position control unit is connected via the second circuit NOT to the first input of the second AND circuit, the first output of the third position control unit is connected via the third circuit NOT to the first input of the third circuit AND, the fourth output of the first position control unit is connected via the fourth circuit NOT to the first input of the fourth circuit And, the fourth output of the second position control unit is connected via the fifth circuit NOT to the first input of the fifth circuit And, the fourth output of the third position control unit is connected through the sixth circuit NOT to the first input of the sixth circuit And, the first input of the control and management unit is connected to the third inputs of the first, second and third circuits And, the second input of the control and management unit is connected to the third inputs of the fourth, fifth and sixth circuits And, the third input of the control and management unit is connected to the second inputs of the first, the second and third circuits And, the fourth input of the control and management unit is connected to the second inputs of the fourth, fifth and sixth circuits And, the first output of the control and management unit is connected to the output of the first majority block, the first, second and third inputs of which are connected with second outputs of the first, second and third position control units, the second output of the control and control unit is connected to the output of the second majority block, the first, second and third inputs of which are connected to the third outputs of the first, second and third position control units, outputs from the first according to the sixth circuit And are connected respectively to the outputs from the third to eighth control and management units, each of the majority units containing a voltage source and six controlled keys, the output is voltage source is connected to the inputs of the first, second and third managed keys, the outputs of the fifth and sixth managed keys are connected to the output of the fourth managed key, the output of the first managed key is connected to the input of the fourth managed key, the output of the second managed key is connected to the input of the fifth managed key, the output of the third the managed key is connected to the input of the sixth managed key, the inputs of the majority block are connected first with the control inputs of the first and fifth managed keys, the second with with the inputs of the second and sixth controlled keys, the third with the control inputs of the third and fourth controlled keys, characterized in that in each of the n control and control units, the first input is additionally connected to the fourth input of the first majority block, and the second input is additionally connected to the fourth input the second majority block, an additional seventh controlled key is introduced into each majority block, the input of which is connected to the output of the fourth controlled key, the output is connected to the output of the majority block, and ravlyaetsya input - to a fourth input of the majority block.

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