CN202749905U - Reliable power supply system of safety valve of voltage stabilizer of pressurized water reactor - Google Patents
Reliable power supply system of safety valve of voltage stabilizer of pressurized water reactor Download PDFInfo
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- CN202749905U CN202749905U CN201220478783.0U CN201220478783U CN202749905U CN 202749905 U CN202749905 U CN 202749905U CN 201220478783 U CN201220478783 U CN 201220478783U CN 202749905 U CN202749905 U CN 202749905U
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Abstract
Disclosed in the utility model is a reliable power supply system of a safety valve of a voltage stabilizer of a pressurized water reactor. The reliable power supply system comprises an LLS power supply switching box connected with an LLS power supply bus and a distributed control system (DCS) equipment cabinet connected with a direct current power supply bus, wherein the DCS equipment cabinet is connected with the LLS power supply switching box; and the LLS power supply switching box powers a valve coil. According to the utility model, the advantages of the reliable power supply system are as follows: when the system is utilized, the safety valve of the voltage stabilizer can be opened forcibly and the opening state can be maintained for 3 hours on the working condition of a serious accident and thus the releasing function of the voltage stabilizer can be extended, thereby effectively mitigating the high-voltage reactor melting risk.
Description
Technical field
The utility model belongs to two generations pressurizations water-water reactor type nuclear power plant reactor valve power supply control technical field, is specially a kind of improved safety valve power supply design, i.e. a kind of reliable power supply system of pressurizer of pressurized-water reactor safety valve.
Background technology
In two generations pressurizations water-water reactor type nuclear power plant, when core exit temperature reached 650 ℃, system provided warning, and the operator is alleviated high-voltage fuse heap risk according to the accident release that three groups of safety valves of the manually opened pressurizer of alarm signal continue.Under this imaginary serious accident operating mode, require the enforced opening of safety valve group to guarantee, continued power time of valve solenoid is not less than 3 hours.And the DC power-supply system storage battery power supply scheme that adopts in original design only can reach 1 hour, and the safety valve that does not satisfy under the serious accident operating mode is opened requirement, need to improve design to the power supply of safety valve.
The utility model content
The utility model design is intended to improve the power supply design of pressurizer safety valve, under serious accident, still can be continuously the safety valve power supply more than 3 hours after normal, emergency service is lost, and satisfies the serious accident working condition requirement.
Implementation of the present utility model is as follows: a kind of reliable power supply system of pressurizer of pressurized-water reactor safety valve, comprise the power switching case that is connected in hydraulic testpump generating set bus (LLS) and Distributed Control System (DCS) rack that is connected in the direct current supply bus, and the DCS rack is connected with LLS power switching case, and LLS power switching case is the valve winding power supply.
LLS power switching case comprises A row LLS power switching case and B row LLS power switching case, the direct current supply bus that is connected in A row LLS power switching case is A row direct current supply bus (LCA), and the direct current supply bus that is connected in B row LLS power switching case is B row direct current supply bus (LCB).
A kind of reliable power supply system of pressurizer of pressurized-water reactor safety valve, comprise the LLS power switching case that is connected in the LLS power supply buses and the DCS rack that is connected in the direct current supply bus, and the DCS rack is connected with LLS power switching case, and LLS power switching case is the valve winding power supply.Wherein, the LLS power supply buses is equivalent to hydraulic testpump generating set bus (LLS), and the power switching case namely refers to LLS power switching case, and the DCS rack is equivalent to Distributed Control System (DCS) rack.
LLS power switching case comprises A row LLS power switching case and B row LLS power switching case, the direct current supply bus that is connected in A row LLS power switching case is LCA direct current supply bus, and the direct current supply bus that is connected in B row LLS power switching case is LCB direct current supply bus.LCA direct current supply bus is equivalent to A row direct current supply bus (LCA), and LCB direct current supply bus is equivalent to B row direct current supply bus (LCB).
Explanation of nouns.The english abbreviation that adopts herein is expressed as respectively: DCS, Distributed Control System; LLS, hydraulic testpump generating set; LCA, A row 48V DC power system, i.e. A row direct current supply bus; LCB, B row 48V DC power system, i.e. B row direct current supply bus.
LLS power switching case comprises that the 380V AC that is connected in successively the LLS power supply buses turns the rectifier of 48V DC, switch, diode A formation, and the electric current of process diode flows to valve winding by the rectifier that 380V AC turns 48V DC.
Be provided with relay in the described DCS rack, the output loop of described relay and direct current supply bus are incorporated into the power networks, and control the cut-offfing of direct current supply bus, described LLS power switching case also comprises the diode B that is connected with diode A, described diode B is connected with the direct current supply bus, and flows to valve winding through the electric current of diode B by the output loop of relay.
Also comprise the back dish, the back dish comprises successively enable switch, the valve switch of series connection, and valve switch is connected with the control loop of relay, and the cut-offfing of the control loop of control relay.
Principle of the present utility model and structure are: add in the heap type nuclear power plant in two generations, when in the normal factory, when the power supply of factory's dispatch from foreign news agency and emergency diesel-oil machine all loses, it is that the important instrument control load of hydraulic testpump and part is powered that generator in the LLS system will start, the LLS system is by diesel engine generator (perhaps turbo generator) power supply of special use, and its duration was much larger than 3 hours.Therefore serious accident operating mode and LCA direct current supply bus and LCB direct current supply bus are occuring when all unavailable, it is the pressurizer safety valve power supply that design switches to by the LLS system.
Take valve winding RCP020EA as example, at the newly-increased LLS power switching case LLS005CR of DCS rack room L509, be furnished with rectifier, switch and diode A and diode B that 380V AC turns 48V DC in the case.When station blackout occuring cause LCA direct current supply bus unavailable, then to close a switch to the L509 room be that RCP020EA powers if the operator need open the safety-valve.
Because pressurizer safety valve RCP017/018/020/021VP is A row (LCA) power supply, RCP019/022VP is B row (LCB) power supplies, in order to reduce as far as possible the common mode of A, B row, therefore designing two cabinets is respectively A row LLS power switching case and B row LLS power switching case.
Safe level of the present utility model is: 1E, rate: K1, quality guarantee grade: Q1, mounting means: wall-hung type, rectifier: 380V AC/48V DC, capacity 10A, contact capacity: 2A, diode capacity: 2A, antidetonation 1 generic request is satisfied in all components and parts and installation.
The pressurizer safety valve power switching of the utility model design can use independent LLS power switching case to realize, similar switching circuit perhaps is set in all the other power distribution cabinets safety valve is switched to the LLS system power supply.
In two generations pressurization water-water reactor type nuclear power station, be the pressurizer safety valve power supply by switching to by the LLS system, but reach 3 hours requirement of safety valve enforced opening under the serious accident operating mode.
The utility model has the advantage of: after adopting the utility model, the safety valve of pressurizer can reach 3 hours by enforced opening under the serious accident operating mode, and the pressurizer pressure relief has obtained extension, can effectively alleviate the risk that high pressure melts heap.
Description of drawings
Fig. 1 is the overall structure schematic diagram when the pressurizer safety valve power switching uses independent LLS power switching case.
Fig. 2 is A row LLS power switching case principle sketch.
Fig. 3 is B row LLS power switching case principle sketch.
Embodiment
Embodiment one
As shown in Figure 1.
When the pressurizer safety valve power switching uses independent LLS power switching case to realize.
A kind of reliable power supply system of pressurizer of pressurized-water reactor safety valve, comprise the LLS power switching case that is connected in the LLS power supply buses and the DCS rack that is connected in the direct current supply bus, and the DCS rack is connected with LLS power switching case, and LLS power switching case is the valve winding power supply.
LLS power switching case comprises that the 380V AC that is connected in successively the LLS power supply buses turns the rectifier of 48V DC, switch, diode A formation, and the electric current of process diode flows to valve winding by the rectifier that 380V AC turns 48V DC.
Be provided with relay in the described DCS rack, the output loop of described relay and direct current supply bus are incorporated into the power networks, and control the cut-offfing of direct current supply bus, described LLS power switching case also comprises the diode B that is connected with diode A, described diode B is connected with the direct current supply bus, and flows to valve winding through the electric current of diode B by the output loop of relay.
Also comprise the back dish, the back dish comprises successively enable switch, the valve switch of series connection, and valve switch is connected with the control loop of relay, and the cut-offfing of the control loop of control relay.
Namely, when in the normal factory, when the power supply of factory's dispatch from foreign news agency and emergency diesel-oil machine all loses, it is that the important instrument control load of hydraulic testpump and part is powered that generator in the LLS system will start, the LLS system is by diesel engine generator (perhaps turbo generator) power supply of special use, and its duration was much larger than 3 hours.Therefore serious accident operating mode and LCA direct current supply bus and LCB direct current supply bus are occuring when all unavailable, it is the pressurizer safety valve power supply that design switches to by the LLS system.
Concrete, take valve winding RCP020EA as example, at the newly-increased LLS power switching case LLS005CR of DCS rack room L509, be furnished with rectifier, switch and diode A and diode B that 380V AC turns 48V DC in the case.When station blackout occuring cause the direct current supply bus unavailable, then to close a switch to the L509 room be that RCP020EA powers if the operator need open the safety-valve.
Embodiment two
As shown in Figure 1, 2, 3, because pressurizer safety valve RCP017/018/020/021VP is A row (LCA) power supply, RCP019/022VP is B row (LCB) power supplies, in order to reduce as far as possible the common mode of A, B row, therefore designing two cabinets is respectively A row LLS power switching case and B row LLS power switching case.
Therefore, on the basis of embodiment one, LLS power switching case comprises A row LLS power switching case and B row LLS power switching case, the direct current supply bus that is connected in A row LLS power switching case is LCA direct current supply bus, and the direct current supply bus that is connected in B row LLS power switching case is LCB direct current supply bus.
Shown in Fig. 2,3, the diode A and the diode B that are arranged on the rectifier outlet line that 380V AC turns 48V DC form anti-reverse charging structure, consist of the pressurizer safety valve power supply behind this anti-reverse charging structure tandem tap and select the circuit combination.In A row LLS power switching case, adopt the pressurizer safety valve power supply of 4 groups of parallel connections to select the circuit combination, the rectifier that 380V AC turns 48V DC can be simultaneously be that the circuit associating power supply is selected in the pressurizer safety valve power supply, to be reached for 4 groups of pressurizer safety valves power supplies or to power for other important instrument controls loads; And in B row LLS power switching case, then adopt 2 groups of pressurizer safety valve power supplies to select the circuit combination.A row LLS power switching case and B row LLS power switching case divided be arranged, to reach the common mode that reduces as far as possible A, B row.
As mentioned above, then can well realize the utility model.
Claims (5)
1. a kind of reliable power supply system of pressurizer of pressurized-water reactor safety valve, it is characterized in that: comprise the LLS power switching case that is connected in the LLS power supply buses and the DCS rack that is connected in the direct current supply bus, and the DCS rack is connected with LLS power switching case, and LLS power switching case is the valve winding power supply.
2. a kind of reliable power supply system of pressurizer of pressurized-water reactor safety valve according to claim 1, it is characterized in that: LLS power switching case comprises A row LLS power switching case and B row LLS power switching case, the direct current supply bus that is connected in A row LLS power switching case is LCA direct current supply bus, and the direct current supply bus that is connected in B row LLS power switching case is LCB direct current supply bus.
3. a kind of reliable power supply system of pressurizer of pressurized-water reactor safety valve according to claim 1, it is characterized in that: LLS power switching case comprises that the 380V AC that is connected in successively the LLS power supply buses turns the rectifier of 48V DC, switch, diode A formation, and the electric current of process diode flows to valve winding by the rectifier that 380V AC turns 48V DC.
4. a kind of reliable power supply system of pressurizer of pressurized-water reactor safety valve according to claim 3, it is characterized in that: be provided with relay in the described DCS rack, the output loop of described relay and direct current supply bus are incorporated into the power networks, and control the cut-offfing of direct current supply bus, described LLS power switching case also comprises the diode B that is connected with diode A, described diode B is connected with the direct current supply bus, and flows to valve winding through the electric current of diode B by the output loop of relay.
5. a kind of reliable power supply system of pressurizer of pressurized-water reactor safety valve according to claim 4, it is characterized in that: also comprise the back dish, the back dish comprises enable switch, the valve switch of successively series connection, and valve switch is connected with the control loop of relay, and the cut-offfing of the control loop of control relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220478783.0U CN202749905U (en) | 2012-09-19 | 2012-09-19 | Reliable power supply system of safety valve of voltage stabilizer of pressurized water reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220478783.0U CN202749905U (en) | 2012-09-19 | 2012-09-19 | Reliable power supply system of safety valve of voltage stabilizer of pressurized water reactor |
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| Publication Number | Publication Date |
|---|---|
| CN202749905U true CN202749905U (en) | 2013-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220478783.0U Expired - Lifetime CN202749905U (en) | 2012-09-19 | 2012-09-19 | Reliable power supply system of safety valve of voltage stabilizer of pressurized water reactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374619A (en) * | 2016-11-14 | 2017-02-01 | 苏州热工研究院有限公司 | Nuclear power plant voltage stabilizer safety valve power supply device and system |
-
2012
- 2012-09-19 CN CN201220478783.0U patent/CN202749905U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374619A (en) * | 2016-11-14 | 2017-02-01 | 苏州热工研究院有限公司 | Nuclear power plant voltage stabilizer safety valve power supply device and system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130220 |