CN103871530A - Series dividing and cooling framework of common users of nuclear power plant equipment cooling water system - Google Patents
Series dividing and cooling framework of common users of nuclear power plant equipment cooling water system Download PDFInfo
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- CN103871530A CN103871530A CN201410103980.8A CN201410103980A CN103871530A CN 103871530 A CN103871530 A CN 103871530A CN 201410103980 A CN201410103980 A CN 201410103980A CN 103871530 A CN103871530 A CN 103871530A
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Abstract
The invention provides a series dividing and cooling framework of common users of a nuclear power plant equipment cooling water system. The series dividing and cooling framework comprises two cooling series and the multiple common users to be cooled, wherein the cooling series are isolated from each other and independent of each other, and the common users comprise at least one redundant cooling user and at least one cross cooling user; the redundant cooling user is provided with two sets of heat-exchange devices cooled through the different cooling series, a heat-exchange device of the cross cooling user is selectively cooled by the first cooling series or the second cooling series. Compared with the prior art, the two cooling series which are isolated from each other and independent of each other are used for cooling the common users in different modes, not only is overdependence on an RRI system common loop avoided, but also common user isolating valves between series are omitted, and the failure probability of an RRI system is greatly reduced; meanwhile, it is ensured that when one single cooling series fails, the redundant cooling user and the cross cooling uses can be cooled continuously and sufficiently.
Description
Technical field
The present invention relates to the cooling of Nuclear Power Plant Equipment cooling water system common user, more particularly, the present invention relates to the cooling framework of Nuclear Power Plant Equipment cooling water system common user apportion that a kind of reliability is higher.
Background technology
Component cooling water system (Component cooling water system, RRI system) provide cooling for the various heat exchangers of nuclear power plant's nuclear island (comprising motor), and heat is passed to ultimate heat sink sea via SEC system (Essential service water system, essential service water system).RRI system forms barrier between the each heat exchanger of nuclear island and seawater, to prevent that radioactive fluid is uncontrollably discharged in seawater, avoids each nuclear island heat exchanger owing to using cooled with seawater to produce the problems such as corrosion fouling.
RRI system is made up of the independent series of multiple identical configurations conventionally, each series except for this series separately the safe level heat interchanger (as containment spray system EAS heat interchanger, safe level chilled water system DEL) of configuration provide cooling, also needing provides cooling for the common user of this unit.These common users do not belong to the ad hoc security system of nuclear power plant, but the necessary system of the normal operation of Ye Shi nuclear power plant; Once these systems can not get RRI system cools, nuclear power plant cannot normally move, and need to ensure reactor safety by the measure of falling power.
At present, the cooling forms that adopt public female pipe of RRI system to common user more, the two or more series that are RRI system are connected with common user's water main pipe by isolation valve between dual series respectively: when a RRI series is in the time supplying water for common user, another one RRI series (or multiple series) is isolated with common user's water main pipe; In the time of different series switchover operation, need to switch the series that supplies water by isolation valve between the series of On/Off corresponding series.
Obviously, the reliability of the cooling undue dependence RRI system share loop of above-mentioned RRI system to common user, once the female pipeline section of public loop occurs to leak or cut, the common user who causes RRI system cannot be obtained fully cooling, when serious, can directly cause RRI common user's total loss.
In addition, RRI system is due to the needs of balance movement time between series, can regularly carry out switchover operation to safety series, and above-mentioned RRI system is carried out safety series while switching, also need just can complete by switching isolation valve between series the switching of the cooling series of common user.This switching mode; tend to cause go here and there in short-term between RRI system series water; the common user of RRI system isolates (approximately 30～60 seconds) in valve events process and has unavoidably the low situation of cooling water flow in short-term between series, and this may cause part common user unavailable (as APG system can cause because cooling water flow is in short-term low protection action) in short-term.And, because each safety series is to be all connected with common user's water main pipe by isolation valve between dual series, therefore safety series handoff procedure needs isolation valve between series to coordinate in groups, any one in four isolation valves breaks down, all will cause safety series handoff failure, and then make common user cooling undesired, affect unit normal power generation.
In view of this, necessaryly provide the cooling framework of Nuclear Power Plant Equipment cooling water system common user apportion that a kind of reliability is higher.
Summary of the invention
The object of the invention is to: provide the cooling framework of Nuclear Power Plant Equipment cooling water system common user apportion that a kind of reliability is higher, to solve problems of the prior art.
To achieve these goals, the invention provides a kind of Nuclear Power Plant Equipment cooling water system common user's the cooling framework of apportion, it comprises two mutually isolation and independently cooling series and multiple common users to be cooled, and described common user comprises that the cooling user of at least one redundancy and at least one intersect cooling user; The cooling user of each redundancy is provided with the identical heat transmission equipment of two cover functions, and two cover heat transmission equipments are connected to separately different cooling series and distinguish cooling by two cooling series; Each intersects cooling user and is only provided with a set of heat transmission equipment, is connected respectively by different pipelines but intersect cooling user's heat transmission equipment with two cooling series, is optionally undertaken cooling by the first cooling series or the second cooling series.
One as the Nuclear Power Plant Equipment cooling water system common user's of the present invention cooling framework of apportion is improved, described two cooling series are respectively the first cooling series and the second cooling series, the first cooling series and the second cooling series are all often to open cooling series, under nuclear power plant's accidental conditions, two cooling series are opened simultaneously; Each cooling series is connected with all common user's heat transmission equipments of this cooling series by the female pipe of public user arranging separately; The female pipe of public user of two cooling series is isolated from each other, and is respectively equipped with common user's isolation valve.
One as the Nuclear Power Plant Equipment cooling water system common user's of the present invention cooling framework of apportion is improved, described each to intersect cooling user's heat transmission equipment quantity be more than one or one, wherein arbitrary heat transmission equipment is all optionally undertaken cooling by the first cooling series or the second cooling series; The cooling user's of same intersection various heat exchange equipment is undertaken cooling by same cooling series, or carries out respectively cooling by the cooling series of difference.
One as the Nuclear Power Plant Equipment cooling water system common user's of the present invention cooling framework of apportion is improved, and the cooling user of described redundancy comprises REA system, DER system, RCV system and EVR system.
One as the Nuclear Power Plant Equipment cooling water system common user's of the present invention cooling framework of apportion is improved, the heat transmission equipment of described REA system is two REA pump motors, the heat transmission equipment of DER system is two DER refrigeratorys, the heat transmission equipment of RCV system is on two RCV, to fill pump motor and two RCV let down heat exchangers, and the heat transmission equipment of EVR system is two EVR refrigeratorys; The first cooling series is carried out coolingly to filling pump motor, RCV let down heat exchanger and EVR refrigeratory on a REA pump motor, a DER refrigeratory, a RCV, and the second cooling series is carried out cooling to filling pump motor, another RCV let down heat exchanger and another EVR refrigeratory on another REA pump motor, another DER refrigeratory, another RCV.
One as the Nuclear Power Plant Equipment cooling water system common user's of the present invention cooling framework of apportion is improved, and the cooling user of described intersection comprises REN system secondary circuit and RCP system.
One as the Nuclear Power Plant Equipment cooling water system common user's of the present invention cooling framework of apportion is improved, the heat transmission equipment of described REN system secondary circuit is REN secondary circuit sampling cooler, when REN secondary circuit sampling cooler is connected with the first cooling series by the first intersection water supply line, be also connected with the second cooling series by the second intersection water supply line; The first intersection water supply line is provided with the first intersection for water isolation valve, the second intersection water supply line is provided with the second intersection for water isolation valve, the one the second intersect and can change but keep opposite each other for the open and-shut mode of water isolation valve, make REN secondary circuit sampling cooler by and only undertaken cooling by one in two cooling series.
One as the Nuclear Power Plant Equipment cooling water system common user's of the present invention cooling framework of apportion is improved, the heat transmission equipment of described RCP system is three RCP main pump motors and heat shielding, wherein, RCP main pump motor and heat shielding are intersected water supply line by the 3rd and are connected to the first cooling series, other two RCP main pump motors and heat shielding connection are connected to the second cooling series by the 4th intersection water supply line, and the 3rd intersection water supply line and the 4th intersects water supply line by the 5th intersection water supply line connection; The 3rd intersection water supply line is provided with the 3rd and intersects for water isolation valve, the 4th intersection water supply line is provided with the 4th and intersects for water isolation valve, the 5th intersects water supply line is provided with the 5th and intersects for water isolation valve, and the 5th intersects water supply line and the three or four intersects the tie point of water supply line and intersect and supply water isolation valve and accordingly between RCP main pump motor and heat shielding the three or four; The described the 3 4th intersects for water isolation valve is normally open valve, only in the time that corresponding cooling series breaks down, closes; The described the 5th intersects for water isolation valve is normally close valve, only in the time that arbitrary cooling system row break down, opens.
One as the Nuclear Power Plant Equipment cooling water system common user's of the present invention cooling framework of apportion is improved, described common user also comprises at least one independent cooling user, each independent cooling user is provided with more than one or one heat transmission equipment, arbitrary heat transmission equipment of independent cooling user be all only connected with in two cooling series one and by this cooling system itemize solely carry out cooling; Same independent cooling user's various heat exchange equipment is undertaken cooling by same cooling series, or carries out respectively cooling by the cooling series of difference.
One as the Nuclear Power Plant Equipment cooling water system common user's of the present invention cooling framework of apportion is improved, described independent cooling user comprises RPE system, REN system one loop, APG system and TEP system, wherein, the heat transmission equipment of RPE system is RPE refrigeratory, the heat transmission equipment in REN system one loop is three REN, mono-loop sampling coolers, the heat transmission equipment of APG system is APG heat interchanger, and the heat transmission equipment of TEP system is TEP heat exchanger; The second cooling series is carried out cooling to RPE refrigeratory and REN mono-loop sampling cooler, the first cooling series is carried out cooling to APG heat interchanger, TEP heat exchanger and other two REN, mono-loop sampling cooler.
Compared with prior art, the Nuclear Power Plant Equipment cooling water system common user's of the present invention cooling framework of apportion utilize the one the second two mutually isolation and independently cooling series be fitted to each other, common user is carried out to the cooling of different modes, not only avoid the undue dependence to existing RRI system share loop, and cancelled common user's isolation valve between series, greatly reduce the failure probability of RRI system; Meanwhile, also guarantee first or when the second cooling serial fault, the cooling user of redundancy that important safety rank is higher and the cooling user of intersecting can obtain continuing cooling fully, indirectly improved the available rate of unit.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, Nuclear Power Plant Equipment cooling water system the common user's of the present invention cooling framework of apportion and beneficial effect thereof are elaborated.
Fig. 1 is the first cooling series of the cooling framework of apportion of Nuclear Power Plant Equipment cooling water system common user of the present invention and user's structural representation thereof.
Fig. 2 is the second cooling series of the cooling framework of apportion of Nuclear Power Plant Equipment cooling water system common user of the present invention and user's structural representation thereof.
Fig. 3 is the intersection cooling structure schematic diagram of REN secondary circuit sampling cooler of the present invention.
Fig. 4 is the intersection cooling structure schematic diagram of RCP main pump motor of the present invention and heat shielding.
Embodiment
In order to make object of the present invention, technical scheme and useful technique effect thereof more clear, below in conjunction with the drawings and specific embodiments, the present invention is further elaborated.Should be understood that, the embodiment of describing in this instructions is only used to explain the present invention, is not intended to limit the present invention.
The Nuclear Power Plant Equipment cooling water system common user's of the present invention cooling framework of apportion comprises the first cooling series, the second cooling series and multiple common user to be cooled.
The first cooling series and the second cooling series be all RRI system often open cooling series, RRI system also comprises a 3rd cooling series for subsequent use.Three cooling series of RRI system provide cooling by separate SEC system for it respectively, and wherein, the user of the first cooling series and the second cooling series comprises respectively private subscribers and public user, and the user of the 3rd cooling series only comprises private subscribers.Under nuclear power plant's accidental conditions, first, second cooling series is opened simultaneously, jointly for private subscribers and public user provide the cooling normal operation that ensures unit; The 3rd cooling series is only under special accident conditions, as the first or second cooling series breaks down, unit shutdown etc., open and provide cooling for private subscribers according to specific needs, thereby coordinate the safety of common guarantee unit with the one the second cooling series that do not break down.
Refer to Fig. 1, the first cooling series comprises that two are established water supply pump 10, two RRI/SEC heat interchanger 12, a ripple tank 14 and connect pipeline and the valve of the said equipment.
Establish water supply pump 10 parallel connections for two, on the branch line that every is established water supply pump 10 places, a RRI/SEC heat interchanger 12 is set, establish that water supply pump 10 is connected with the RRI side of RRI/SEC heat interchanger 12 and be its water supply; Two exits of establishing water supply pump 10 are connected with the miniflow line 100 of a band isolation valve.Establish water supply pump 10 and every RRI/SEC heat interchanger 12 all has 100% capacity for every, therefore establish water supply pump 10 and arbitrary RRI/SEC heat interchanger 12 and be used in conjunction with the heat that can meet the first cooling series and derive demand for arbitrary.Establish all electrodynamic pumps for being powered by 10kV emergency switchboard of water supply pump 10 for two.The RRI side of every RRI/SEC heat interchanger 12 is provided with the thermoregulator bypass line 120 for RRI, and electric control valve 122 is installed on bypass line 120.Ripple tank 14 is arranged in two and establishes on the shared suction line of water supply pump 10 102.
The user of the first cooling series comprises that private subscribers 16 and 18, two kinds of users of public user are parallel-connection structure.These users' heat transmission equipment is all arranged on the shared water outlet pipeline 124 of two RRI/SEC heat interchanger 12 and establishes between the suction line 102 of water supply pump 10.
The heat transmission equipment of private subscribers 16 comprises that RIS RHR heat interchanger 160, RIS high voltage/low voltage safety injection pump motor 162, EHR heat interchanger 164(comprise EHR motor and heat exchanger), PTR heat interchanger 166(comprises PTR Spent Fuel Pool heat exchanger and pump motor refrigeratory) and RRI pump motor 168.After the heat transmission equipment 160-168 of above-mentioned private subscribers 16 is connected in parallel to each other, the female pipe 169 of the first cooling serial private subscribers by two ends and RRI/SEC heat interchanger water outlet pipeline 124 and establish water supply pump suction line 102 and be connected and form the first cooling serial private subscribers cooling circuit.
Public user's 18 heat transmission equipment also comprises multiple, after these heat transmission equipments are connected in parallel to each other, the female pipe 180 of public user by two ends and RRI/SEC heat interchanger water outlet pipeline 124 and establish water supply pump suction line 102 and be connected and form first cooling serial common user's cooling circuit; Article two, on the female pipe 180 of common user, be all provided with common user's isolation valve 182, common user's isolation valve 182 is for realizing the opening and closing of the public user's cooling circuit of the first cooling series.
Refer to Fig. 2, the second cooling series comprises that two are established water supply pump 30, two RRI/SEC heat interchanger 32, a ripple tank 34 and connect pipeline and the valve of the said equipment.Because the second cooling series is identical with the one-piece construction of the first cooling series, therefore no longer the concrete layout of its equipment and pipeline is repeated.
The user of the second cooling series comprises that private subscribers 36 and 38, two kinds of users of public user are parallel-connection structure.Wherein, the heat transmission equipment of private subscribers 36 and pipeline connect also identical with the first cooling series, repeat no more.
Public user's 38 heat transmission equipment also comprises multiple, after these heat transmission equipments are connected in parallel to each other, the female pipe 380 of public user by two ends and RRI/SEC heat interchanger water outlet pipeline 324 and establish water supply pump suction line 302 and be connected and form second cooling serial common user's cooling circuit; Article two, on the female pipe 380 of common user, be all provided with common user's isolation valve 382, common user's isolation valve 382 is for realizing the opening and closing of the public user's cooling circuit of the second cooling series.
In order to improve the defect existing in prior art, the present invention is divided into common user to be cooled the cooling user of redundancy, intersects cooling user and independent cooling user three classes according to important safety rank.Wherein, the cooling user's of redundancy important safety rank is the highest, all need to ensure fully cooling in any situation, therefore the cooling user of each redundancy is provided with the identical heat transmission equipment of two cover functions, and two cover heat transmission equipments are connected to the one the second cooling series and cooling respectively by two cooling series separately; The cooling user of intersecting is F1B level (important safety level) user, under accident conditions, need to ensure available, although therefore each intersects cooling user and is only provided with a set of heat transmission equipment, but its heat transmission equipment is connected respectively with the one the second cooling series by different pipelines, can optionally be undertaken cooling by the first cooling series or the second cooling series; Independent cooling user is F2 level (less important safe level) or non-security level user, it only need use at normal operation period, under accident conditions, can isolate, therefore, each independent cooling user is also only provided with a set of heat transmission equipment, and this cover heat transmission equipment be only connected with in the one the second cooling series one and by this cooling system itemize solely carry out cooling.
Certainly, it should be noted that, the cooling user's of arbitrary intersection the included heat transmission equipment quantity of a set of heat transmission equipment may be all more than one or one, and arbitrary in these heat transmission equipments is all optionally undertaken cooling by the first cooling series or the second cooling series; But the cooling user's of same intersection various heat exchange equipment can be undertaken by same cooling series cooling, also can carry out respectively cooling by the cooling series of difference.In like manner, arbitrary independent cooling user's the included heat transmission equipment quantity of a set of heat transmission equipment may be all more than one or one, in these heat transmission equipments arbitrary be all only connected with in the one the second cooling series one and by this cooling system itemize solely carry out cooling; But same independent cooling user's various heat exchange equipment can be undertaken by same cooling series cooling, also can carry out respectively cooling by the cooling series of difference.
Please refer to Fig. 1 and Fig. 2, the cooling user of redundancy of the present invention comprises REA system (Reactor boron and water makeup system, reactor boron and water make-up system), DER system (Operational chilled water system, operation chilled water system), RCV(Chemical and volume control system, chemistry volume and control system system) and EVR system (Containment cooling ventilation system, containment fan cooler).Particularly, the heat transmission equipment of REA system is two REA pump motors 400,402, the heat transmission equipment of DER system is two DER refrigeratorys 420,422, the heat transmission equipment of RCV system is on two RCV, to fill pump motor 440,442 and two RCV let down heat exchangers 444,446, and the heat transmission equipment of EVR system is two EVR refrigeratorys 460,462.Wherein, on REA pump motor 400, DER refrigeratory 420, RCV, fill pump motor 440, RCV let down heat exchanger 444 and EVR refrigeratory 460 and be connected to respectively the female pipe 180 of public user of the first cooling series, undertaken cooling by the first cooling series; On REA pump motor 402, DER refrigeratory 422, RCV, fill the female pipe 380 of public user that pump motor 442, RCV let down heat exchanger 446 and 462, EVR refrigeratory are connected to respectively the second cooling series, undertaken cooling by the second cooling series.The two ends of EVR refrigeratory 460,462 and RCV let down heat exchanger 444,446 are all respectively equipped with reactor building safety isolating valve 480, and the two ends of DER refrigeratory 420,422 and REA pump motor 400,402 are provided with non-security level user isolation valve 482.
The cooling user of intersection of the present invention comprises REN system (Nuclear sampling system, core sampling system) secondary circuit and RCP system (Reactor coolant system, reactor coolant loop).
Refer to figure Fig. 1 to Fig. 3, the heat transmission equipment of REN system secondary circuit is REN secondary circuit sampling cooler 500.REN secondary circuit sampling cooler 500 is connected with the female pipe 180 of public user of the first cooling series by the first intersection water supply line 502, is connected with the female pipe 380 of public user of the second cooling series by the second intersection water supply line 504.The first intersection water supply line 502 is provided with the first intersection and is provided with the second intersection for water isolation valve 508 for water isolation valve 506, the second intersection water supply lines 504.The one the second intersect and can change but need to keep opposite each other for the open and-shut mode of water isolation valve 506,508, thus make REN secondary circuit sampling cooler 500 by and only undertaken cooling by one in the one the second cooling series.For example, under nuclear power plant's accidental conditions, the first intersection is opened for water isolation valve 506, and the second intersection is closed for water isolation valve 508, and now, REN secondary circuit sampling cooler 500 is only cooling by the first cooling series water supply; In the time of the first cooling serial fault, close the first intersection for water isolation valve 506, and open the second intersection for water isolation valve 508, make REN secondary circuit sampling cooler 500 only supply water cooling by the second cooling series.Visible, the present invention intersects by the one the second the design that water supply line 502,504 and the one the second intersects for water isolation valve 506,508, and the REN secondary circuit sampling cooler 500 of cooling user REN system secondary circuit of having ensured to intersect all can be used in the time of arbitrary cooling system row fault.
Refer to Fig. 1, Fig. 2 and Fig. 4, the heat transmission equipment of RCP system is three RCP main pump motors and heat shielding 520,522, wherein, RCP main pump motor and heat shielding 520 are intersected water supply line 540 by the 3rd and are connected to the female pipe 180 of public user of the first cooling series, and other two RCP main pump motors and heat shielding 522 are intersected water supply line 542 by the 4th and be connected to the female pipe 380 of public user of the second cooling series.The 3rd intersection water supply line 540 and the 4th intersection water supply line 542 are communicated with by the 5th intersection water supply line 544; On the 3rd intersection water supply line 540, being also provided with the 3rd intersects for water isolation valve 546, on the 4th intersection water supply line 542, being also provided with the 4th intersects for water isolation valve 548, the 5th intersects and is provided with the 5th on water supply line 544 and intersects and intersect water supply lines 544 and the three or four for water isolation valve 550, the five and intersects the tie point of water supply line 540,542 and intersect and supply water isolation valve 546,548 and accordingly between RCP main pump motor and heat shielding 520,522 the three or four.Under nuclear power plant's accidental conditions, the three or four intersects and opens for water isolation valve 546,548, and the 5th intersects and close for water isolation valve 550, makes RCP main pump motor and heat shielding 520,522 supply separately water cooling by the one the second cooling series respectively; In the time of the first cooling serial fault, close the 3rd and intersect for water isolation valve 546, and open the 5th intersection for water isolation valve 550, make RCP main pump motor and heat shielding 520,522 all supply water cooling by the second cooling series; In like manner, in the time of the second cooling serial fault, close the 4th and intersect for water isolation valve 548, and open the 5th intersection for water isolation valve 550, make RCP main pump motor and heat shielding 520,522 all supply water cooling by the first cooling series.Visible, the present invention intersects water supply line 544 and the 5th by the 5th and intersects for the design of water isolation valve 550, and three RCP main pump motors and the heat shielding 520,522 of cooling user RCP system of having ensured to intersect all can be used in the time of arbitrary cooling system row fault.
Independent cooling user of the present invention comprises RPE system (Nuclear Island Vent and Drain system, nuclear island exhaust and draining system), REN system one loop, APG system (Steam generator blowdown system, steam generator blowdown system) and TEP system (Coolant purification degasification, storage and treatment system, cooling medium storage and disposal system).Particularly, the heat transmission equipment of RPE system is a RPE refrigeratory 60, the heat transmission equipment in REN system one loop is three REN, mono-loop sampling coolers 620,622, the heat transmission equipment of APG system is an APG heat interchanger 64, and the heat transmission equipment of TEP system is that a set of TEP heat exchanger 66(comprises evaporator, deaeration tower, vacuum stripping tower).Wherein, RPE refrigeratory 60 and a female pipe 380 of public user that REN mono-loop sampling cooler 622 is connected to respectively the second cooling series, undertaken cooling by the second cooling series; APG heat interchanger 64, TEP heat exchanger 66 and 620 of other two REN, mono-loop sampling coolers are connected to respectively the female pipe 180 of public user of the first cooling series, are undertaken cooling by the first cooling series.
Known by above description, the Nuclear Power Plant Equipment cooling water system common user's of the present invention cooling framework of apportion is divided into common user to be cooled the cooling user of redundancy, intersects cooling user and independent cooling user three classes according to important safety rank, and utilize the one the second two mutually isolation and independently cooling series be fitted to each other, three class common users are carried out to the cooling of different modes, not only avoid the undue dependence to existing RRI system share loop, and cancelled common user's isolation valve between series, greatly reduce the failure probability of RRI system; Meanwhile, also guarantee first or when the second cooling serial fault, the cooling user of redundancy that important safety rank is higher and the cooling user of intersecting can obtain continuing cooling fully, indirectly improved the available rate of unit.
Visible, compared with prior art, the Nuclear Power Plant Equipment cooling water system common user's of the present invention cooling framework of apportion at least has the following advantages:
1) common user by mutual isolation and independently the one the second cooling series carry out respectively cooling, thereby avoided the undue dependence to existing RRI system share loop;
2) cancel common user's isolation valve between series, also just avoided common user's problem of cooling deficiency in short-term in valve event process, reduced switching controls simultaneously, reduced failure risk point;
3) highest-ranking important safety common user is carried out to Redundancy Design, make the cooling user of each redundancy have the identical heat transmission equipment of two cover functions, two cover heat transmission equipments are connected to separately different cooling series and carry out cooling, therefore any one cooling series is available, all can ensure that the cooling user of redundancy can use, this has not only improved the reliability of chilled water, has also indirectly improved the available rate of unit;
4) important common user is intersected to the design of supplying water, the intersection by the first second series supplies water, and meets to intersect the cooling requirement of cooling user under accident conditions.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also carry out suitable change and amendment to above-mentioned embodiment.Therefore, the present invention is not limited to embodiment disclosed and described above, also should fall in the protection domain of claim of the present invention modifications and changes more of the present invention.In addition,, although used some specific terms in this instructions, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (10)
1. the cooling framework of a Nuclear Power Plant Equipment cooling water system common user apportion, it comprises two mutually isolation and independently cooling series and multiple common users to be cooled, it is characterized in that: described common user comprises that the cooling user of at least one redundancy and at least one intersect cooling user; The cooling user of each redundancy is provided with the identical heat transmission equipment of two cover functions, and two cover heat transmission equipments are connected to separately different cooling series and distinguish cooling by two cooling series; Each intersects cooling user and is only provided with a set of heat transmission equipment, is connected respectively by different pipelines but intersect cooling user's heat transmission equipment with two cooling series, is optionally undertaken cooling by the first cooling series or the second cooling series.
2. the Nuclear Power Plant Equipment cooling water system common user's according to claim 1 cooling framework of apportion, it is characterized in that: described two cooling series are respectively the first cooling series and the second cooling series, the first cooling series and the second cooling series are all often to open cooling series, under nuclear power plant's accidental conditions, two cooling series are opened simultaneously; Each cooling series is connected with all common user's heat transmission equipments of this cooling series by the female pipe of public user arranging separately; The female pipe of public user of two cooling series is isolated from each other, and is respectively equipped with common user's isolation valve.
3. the Nuclear Power Plant Equipment cooling water system common user's according to claim 1 cooling framework of apportion, it is characterized in that: described each to intersect cooling user's heat transmission equipment quantity be more than one or one, wherein arbitrary heat transmission equipment is all optionally undertaken cooling by the first cooling series or the second cooling series; The cooling user's of same intersection various heat exchange equipment is undertaken cooling by same cooling series, or carries out respectively cooling by the cooling series of difference.
4. according to the cooling framework of apportion of the Nuclear Power Plant Equipment cooling water system common user described in claim 1,2 or 3, it is characterized in that: the cooling user of described redundancy comprises REA system, DER system, RCV system and EVR system.
5. the Nuclear Power Plant Equipment cooling water system common user's according to claim 4 cooling framework of apportion, it is characterized in that: the heat transmission equipment of described REA system is two REA pump motors, the heat transmission equipment of DER system is two DER refrigeratorys, the heat transmission equipment of RCV system is on two RCV, to fill pump motor and two RCV let down heat exchangers, and the heat transmission equipment of EVR system is two EVR refrigeratorys; The first cooling series is carried out coolingly to filling pump motor, RCV let down heat exchanger and EVR refrigeratory on a REA pump motor, a DER refrigeratory, a RCV, and the second cooling series is carried out cooling to filling pump motor, another RCV let down heat exchanger and another EVR refrigeratory on another REA pump motor, another DER refrigeratory, another RCV.
6. according to the cooling framework of apportion of the Nuclear Power Plant Equipment cooling water system common user described in claim 1,2 or 3, it is characterized in that: the cooling user of described intersection comprises REN system secondary circuit and RCP system.
7. the Nuclear Power Plant Equipment cooling water system common user's according to claim 6 cooling framework of apportion, it is characterized in that: the heat transmission equipment of described REN system secondary circuit is REN secondary circuit sampling cooler, when REN secondary circuit sampling cooler is connected with the first cooling series by the first intersection water supply line, be also connected with the second cooling series by the second intersection water supply line; The first intersection water supply line is provided with the first intersection for water isolation valve, the second intersection water supply line is provided with the second intersection for water isolation valve, the one the second intersect and can change but keep opposite each other for the open and-shut mode of water isolation valve, make REN secondary circuit sampling cooler by and only undertaken cooling by one in two cooling series.
8. the Nuclear Power Plant Equipment cooling water system common user's according to claim 6 cooling framework of apportion, it is characterized in that: the heat transmission equipment of described RCP system is three RCP main pump motors and heat shielding, wherein, RCP main pump motor and heat shielding are intersected water supply line by the 3rd and are connected to the first cooling series, other two RCP main pump motors and heat shielding connection are connected to the second cooling series by the 4th intersection water supply line, and the 3rd intersection water supply line and the 4th intersects water supply line by the 5th intersection water supply line connection; The 3rd intersection water supply line is provided with the 3rd and intersects for water isolation valve, the 4th intersection water supply line is provided with the 4th and intersects for water isolation valve, the 5th intersects water supply line is provided with the 5th and intersects for water isolation valve, and the 5th intersects water supply line and the three or four intersects the tie point of water supply line and intersect and supply water isolation valve and accordingly between RCP main pump motor and heat shielding the three or four; The described the 3 4th intersects for water isolation valve is normally open valve, only in the time that corresponding cooling series breaks down, closes; The described the 5th intersects for water isolation valve is normally close valve, only in the time that arbitrary cooling system row break down, opens.
9. according to the cooling framework of apportion of the Nuclear Power Plant Equipment cooling water system common user described in claim 1,2 or 3, it is characterized in that: described common user also comprises at least one independent cooling user, each independent cooling user is provided with more than one or one heat transmission equipment, arbitrary heat transmission equipment of independent cooling user be all only connected with in two cooling series one and by this cooling system itemize solely carry out cooling; Same independent cooling user's various heat exchange equipment is undertaken cooling by same cooling series, or carries out respectively cooling by the cooling series of difference.
10. the Nuclear Power Plant Equipment cooling water system common user's according to claim 9 cooling framework of apportion, it is characterized in that: described independent cooling user comprises RPE system, REN system one loop, APG system and TEP system, wherein, the heat transmission equipment of RPE system is RPE refrigeratory, the heat transmission equipment in REN system one loop is three REN, mono-loop sampling coolers, the heat transmission equipment of APG system is APG heat interchanger, and the heat transmission equipment of TEP system is TEP heat exchanger; The second cooling series is carried out cooling to RPE refrigeratory and REN mono-loop sampling cooler, the first cooling series is carried out cooling to APG heat interchanger, TEP heat exchanger and other two REN, mono-loop sampling cooler.
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