CN209591545U - A kind of secondary circuit security system for reactor emergency shut-down - Google Patents
A kind of secondary circuit security system for reactor emergency shut-down Download PDFInfo
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- CN209591545U CN209591545U CN201920233202.9U CN201920233202U CN209591545U CN 209591545 U CN209591545 U CN 209591545U CN 201920233202 U CN201920233202 U CN 201920233202U CN 209591545 U CN209591545 U CN 209591545U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The utility model discloses a kind of secondary circuit security systems for reactor emergency shut-down; including 1# reactor, 1# steam generator, 2# reactor, 2# steam generator, condenser, high pressure cylinder, direct-contact desuperheater, low pressure (LP) cylinder, condensate system, auxiliary electric boiler, superheater and generating set; the system can effectively solve the problem that the high-temperature steam that steam generator exports during reactor emergency shut-down gives condenser bring thermic load shock problem, while solve the problems, such as to be forced to destroy vacuum shutdown since packing vapour source loses during halt turbines.
Description
Technical field
The utility model belongs to technical field of nuclear power, is related to a kind of secondary circuit safety system for reactor emergency shut-down
System.
Background technique
Ball bed modular high temperature gas cooled reactor is the Generation Ⅳ of Chinese independent research, You Liangtai reactor, Liang Tai
Steam generator and a Turbo-generator Set composition.The reactor is set out during emergency shut-down using waste heat is passive
Function substantially overcomes a possibility that core melt down accident occurs, and is that the generally acknowledged one kind of international nuclear energy circle has good Special safety
The heap-type of property.After reactor triggers emergency shut-down, primary Ioops reactor core is passed through by passive safety system afterheat cooling, secondary circuit
External steam cooling steam generator secondary side heating surface bank is introduced to accelerate the export of primary Ioops residual heat of nuclear core.Promptly stop simultaneously
The safety that Turbo-generator Set is completed during heap is stopped transport.Current design scheme are as follows: the 1) auxiliary that electric boiler will be assisted to provide
Steam is passed through steam generator secondary side and carrys out Cooling Heat Transfer tube bank, and it is secondary that the auxiliary steam after heating successively passes through steam generator
Side outlet and main steam bypass valve group heel row enter condenser；2) steam turbine main steam inlet valve group is closed when emergency shut-down, steamer
Machine revolving speed is begun to decline until zero speed.During halt turbines coasting operation, sentenced according to steam turbine load height when emergency shut-down
Disconnected turbine steam seal system is supplied by main steam or auxiliary steam.Steam is sent out when the design scheme can tentatively realize emergency shut-down
The cooling of raw device secondary side, so that it is guaranteed that the safety of steam generator is stopped transport and the quick export of primary Ioops residual heat of nuclear core；Simultaneously
Main steam or auxiliary steam are used according to steam turbine load height when emergency shut-down, realizes the packing using two kinds of different temperatures
Vapour source carrys out steam turbine high-pressure cylinder metal temperature when Dynamic Matching emergency shut-down.But the above design scheme at least suffers from the drawback that
1) in steam generator secondary side cooling procedure, auxiliary steam becomes hyperthermia and superheating after steam generator secondary side tube bank heating
Steam, which, which is directly discharged into condenser, will cause the biggish thermic load impact of condenser；2) steamer when emergency shut-down
Machine load is higher, and turbine steam seal system is supplied by main steam in main steam line, and halt turbines idling time is generally 45-
60min, main steam total flow is unable to maintain that steam turbine idling time inner gland steam always needs in main steam line after emergency shut-down
The amount of asking, in order to guarantee that steam turbine can stop transport safely, when seal steam underfed, must destroy vacuum shutdown, this is unconventional to stop
Machine mode is affected to steam turbine long-term safety stable operation.
Utility model content
The shortcomings that the purpose of the utility model is to overcome the above-mentioned prior arts provides one kind and promptly stops for reactor
The secondary circuit security system of heap, the system can effectively solve the problem that the high-temperature steam that steam generator exports gives condenser bring heat
Load impact problem, while solving the problems, such as to be forced to destroy vacuum shutdown since packing vapour source loses during halt turbines.
In order to achieve the above objectives, the secondary circuit security system described in the utility model for reactor emergency shut-down includes
1# reactor, 1# steam generator, 2# reactor, 2# steam generator, condenser, high pressure cylinder, direct-contact desuperheater, low pressure (LP) cylinder,
Condensate system, auxiliary electric boiler, superheater and generating set；
The outlet of 1# reactor is connected with the heat release side entrance of 1# steam generator, the outlet of 1# reactor and 1# steam
The heat release side outlet of generator is connected, and the outlet of 2# reactor is connected with the heat release side entrance of 2# steam generator, and 2# is anti-
The entrance of heap is answered to be connected with the heat release side outlet of 2# steam generator, the heat absorption side outlet and 2# steam of 1# steam generator are sent out
The heat absorption side outlet of raw device passes through pipeline and the packing and water spray of the entrance of Guan Houyu condenser, the entrance of high pressure cylinder and high pressure cylinder
The entrance of attemperator is connected, and the outlet of direct-contact desuperheater and the entrance of condenser and the packing of low pressure (LP) cylinder are connected, condensed water
The outlet of system is connected with the cooling water inlet of direct-contact desuperheater；The outlet of auxiliary electric boiler is connected with the entrance of superheater
Logical, the outlet of superheater and the entrance of direct-contact desuperheater, the packing of high pressure cylinder, the heat absorption side entrance of 1# steam generator and 2# steam
The heat absorption side entrance of vapour generator is connected；
The steam (vapor) outlet of high pressure cylinder is connected with the steam inlet of low pressure (LP) cylinder, and high pressure cylinder, low pressure (LP) cylinder and generating set are same
Axis arrangement.
It further include 1# dump tank and 2# dump tank, wherein the entrance of 1# dump tank is arranged through the first accident
It puts isolating valve to be connected with the heat absorption side entrance of 1# steam generator, the entrance of 2# dump tank is isolated through the second dump
Valve is connected with the heat absorption side entrance of 2# steam generator.
It further include 1# main steam isolation valve, 2# main steam isolation valve, steam turbine inlet valve group and main steam gland sealing steam supply valve
Group；
The heat absorption side outlet of 1# steam generator is connected with one end of 1# main steam isolation valve, the suction of 2# steam generator
Hot side outlet is connected with one end of 2# main steam isolation valve, the other end and the 2# main steam isolation valve of 1# main steam isolation valve
The other end is by pipeline and the entrance of Guan Houyu condenser, one end of steam turbine inlet valve group and main steam gland sealing steam supply valve group
One end is connected, and the other end of steam turbine inlet valve group is connected with the entrance of high pressure cylinder, main steam gland sealing steam supply valve group it is another
One end is connected with the entrance of the packing of high pressure cylinder and direct-contact desuperheater, and 1# main steam isolation valve passes through with 2# main steam isolation valve
Pipeline and Guan Houjing main steam bypass valve group and are connected with the entrance of condenser.
It further include superheater entrance motor-driven valve, superheater outlet regulating valve, auxiliary steam non-return valve, auxiliary steam for packing
The cooling isolating valve of isolating valve, auxiliary steam, 1# main feed water isolating valve and 2# main feed water isolating valve；
The outlet of electric boiler is assisted to steam after superheater entrance motor-driven valve, superheater and superheater outlet regulating valve with auxiliary
One end of vapour non-return valve and one end of auxiliary steam steam supply envelope isolating valve are connected, and the other end of auxiliary steam non-return valve is through assisting
It is divided into two-way after the cooling isolating valve of steam, wherein the heat absorption side entrance phase through 1# main feed water isolating valve with 1# steam generator all the way
Connection, another way are connected through 2# main feed water isolating valve with the heat absorption side entrance of 2# steam generator, the packing of auxiliary steam steam supply
The other end from valve is connected with the entrance of the packing of high pressure cylinder and direct-contact desuperheater.
It is connected between the outlet of condensate system and the cooling water inlet of direct-contact desuperheater by attemperator regulating valve.
The entrance of condenser is connected through packing overflow regulating valve with the packing of low pressure (LP) cylinder.
The utility model has the following beneficial effects:
Secondary circuit security system described in the utility model for reactor emergency shut-down works as reaction when specific operation
After heap triggers emergency shut-down, the heat absorbing side of 1# steam generator and the heat absorption of 2# steam generator are cooled down using auxiliary steam
Side, to be taken away while reducing 1# steam generator heat absorbing side heating surface bank temperature and 2# steam generator heat absorbing side tube bank temperature
The waste heat of 1# reactor and 2# reactor core greatly shortens the cooling time of 1# reactor and 2# reactor, guarantees that 1# steams
Vapour generator and 2# steam generator are stopped transport safely, while by the auxiliary after 1# steam generator and the heating of 2# steam generator
Vapour source of the steam as turbine steam seal system is forced to destroy vacuum during solving halt turbines since packing vapour source loses
The problem of shutdown.In practical operation, different grades of steamer can be chosen according to steam turbine load height when emergency shut-down
Machine gland sealing steam supply parameter realizes that steam turbine start-up course high pressure cylinder gland sealing steam supply temperature matches with high pressure cylinder metal temperature,
Greatly improve Turbine Safety reliability of operation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Wherein, 1 it is 1# reactor, 2 be 1# steam generator, 3 be 2# reactor, 4 be 2# steam generator, 5 is 1# master
Feedwater isolation valve, 6 be 2# main feed water isolating valve, 7 be 1# main steam isolation valve, 8 be 2# main steam isolation valve, 9 be the first accident
Discharge isolating valve, 10 be the second dump isolating valve, 11 be 1# dump tank, 12 be 2# dump tank, steam based on 13
Vapour bypass valve group, 14 be main steam gland sealing steam supply valve group, 15 be steam turbine inlet valve group, 16 be high pressure cylinder, 17 be low pressure (LP) cylinder, 18
It is condenser for generating set, 19,20 be condensate system, 21 be attemperator regulating valve, 22 be direct-contact desuperheater, 23 is packing
Overflow regulating valve, 24 be auxiliary electric boiler, 25 be superheater entrance motor-driven valve, 26 be superheater, 27 be superheater outlet adjust
Valve, 28 be auxiliary steam non-return valve, 29 be the cooling isolating valve of auxiliary steam, 30 be auxiliary steam steam supply envelope isolating valve.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing:
As shown in Figure 1, the secondary circuit security system described in the utility model for reactor emergency shut-down includes 1# anti-
Answer heap 1,1# steam generator 2,2# reactor 3,2# steam generator 4, condenser 19, high pressure cylinder 16, direct-contact desuperheater 22, low
Cylinder pressure 17, condensate system 20 ,-auxiliary electric boiler 24, superheater 26 and generating set 18；
The outlet of 1# reactor 1 is connected with the heat release side entrance of 1# steam generator 2, the outlet of 1# reactor 1 and 1#
The heat release side outlet of steam generator 2 is connected, and the outlet of 2# reactor 3 is connected with the heat release side entrance of 2# steam generator 4
Logical, the entrance of 2# reactor 3 is connected with the heat release side outlet of 2# steam generator 4, the heat absorption side outlet of 1# steam generator 2
Pass through the entrance of pipeline and Guan Houyu condenser 19, the entrance and height of high pressure cylinder 16 with the heat absorption side outlet of 2# steam generator 4
The packing of cylinder pressure 16 and the entrance of direct-contact desuperheater 22 are connected, and the outlet of the entrance and condenser 19 of direct-contact desuperheater 22 passes through
The packing of pipeline and Guan Houyu low pressure (LP) cylinder 17 is connected, the outlet of condensate system 20 and the cooling water inlet of direct-contact desuperheater 22
It is connected；The outlet of auxiliary electric boiler 24 is connected with the entrance of superheater 26, the outlet of superheater 26 and direct-contact desuperheater 22
Entrance, the packing of high pressure cylinder 16, the heat absorption side entrance of 1# steam generator 2 and the heat absorption side entrance phase of 2# steam generator 4
Connection；
The steam (vapor) outlet of high pressure cylinder 16 is connected with the steam inlet of low pressure (LP) cylinder 17, and high pressure cylinder 16, low pressure (LP) cylinder 17 and hair
Motor group 18 is coaxially arranged.
The utility model further includes 1# dump tank 11 and 2# dump tank 12, wherein 1# dump tank 11
Entrance is connected through the first dump isolating valve 9 with the heat absorption side entrance of 1# steam generator 2, and 2# dump tank 12 enters
Mouth is connected through the second dump isolating valve 10 with the heat absorption side entrance of 2# steam generator 4.
The utility model further includes 1# main steam isolation valve 7,2# main steam isolation valve 8, steam turbine inlet valve group 15 and master
Steam gland sealing steam supply valve group 14；The heat absorption side outlet of 1# steam generator 2 is connected with one end of 1# main steam isolation valve 7,2#
The heat absorption side outlet of steam generator 4 is connected with one end of 2# main steam isolation valve 8, the other end of 1# main steam isolation valve 7
With the other end of 2# main steam isolation valve 8 by the entrance of pipeline and Guan Houyu condenser 19, steam turbine inlet valve group 15 one
End and one end of main steam gland sealing steam supply valve group 14 are connected, the other end of steam turbine inlet valve group 15 and the entrance of high pressure cylinder 16
It is connected, the other end of main steam gland sealing steam supply valve group 14 is connected with the entrance of the packing of high pressure cylinder 16 and direct-contact desuperheater 22
It is logical, wherein 1# main steam isolation valve 7 bypasses valve group 13 by pipeline and Guan Houjing main steam with 2# main steam isolation valve 8 and coagulates
The entrance of vapour device 19 is connected.
The utility model further includes superheater entrance motor-driven valve 25, superheater outlet regulating valve 27, auxiliary steam non-return valve
28, the cooling isolating valve 29 of auxiliary steam steam supply envelope isolating valve 30, auxiliary steam, 1# main feed water isolating valve 5 and 2# master are to water segregation
Valve 6；Assist electric boiler 24 outlet after superheater entrance motor-driven valve 25, superheater 26 and superheater outlet regulating valve 27 with it is auxiliary
Help steam non-return valve 28 one end and auxiliary steam steam supply envelope isolating valve 30 one end be connected, auxiliary steam non-return valve 28 it is another
One end is divided into two-way after the cooling isolating valve 29 of auxiliary steam, wherein all the way through 1# main feed water isolating valve 5 and 1# steam generator 2
Heat absorption side entrance be connected, another way is connected through 2# main feed water isolating valve 6 with the heat absorption side entrance of 2# steam generator 4,
The other end of auxiliary steam steam supply envelope isolating valve 30 is connected with the entrance of the packing of high pressure cylinder 16 and direct-contact desuperheater 22；Condensation
It is connected between the outlet of water system 20 and the cooling water inlet of direct-contact desuperheater 22 by attemperator regulating valve 21；Condenser 19
Entrance be connected through packing overflow regulating valve 23 with the packing of low pressure (LP) cylinder 17.
The specific work process of the utility model are as follows:
In unit starting and during normal operation, 1# main feed water isolating valve 5,2# main feed water isolating valve 6,1# main steam are opened
Isolating valve 7,2# main steam isolation valve 8, steam turbine inlet valve group 15, attemperator regulating valve 21, packing overflow regulating valve 23, overheat
Device entrance motor-driven valve 25, superheater outlet regulating valve 27 and auxiliary steam steam supply seal isolating valve 30, and the main water supply of secondary circuit is through 1# master
Feedwater isolation valve 5 and 2# main feed water isolating valve 6 enter in 1# steam generator 2 and 2# steam generator 4, and pass through 1# reactor
The hot working fluid that 1 and 2# reactor 3 exports carries out being heated as main steam, the main steam and 2# steam that 1# steam generator 2 exports
It is entered in high pressure cylinder 16 and low pressure (LP) cylinder 17 after the main steam confluence that generator 4 exports, and passes through high pressure cylinder 16 and low pressure (LP) cylinder 17
Generating set 18 is driven to generate electricity；
When steam turbine load is less than 50% unit rated load, the auxiliary steam that auxiliary electric boiler 24 exports successively passes through
For high pressure after hot device entrance motor-driven valve 25, superheater 26, superheater outlet regulating valve 27 and auxiliary steam steam supply envelope isolating valve 30
17 packing of cylinder 16 and low pressure (LP) cylinder.When steam turbine load rises to 50%-100% unit rated load, turbine steam seal system is real
Existing self-sealing, superheater entrance motor-driven valve 25, superheater outlet regulating valve 27 and auxiliary steam steam supply envelope isolating valve 30 are closed；
After 1# reactor 1 triggers emergency shut-down, then 1# main feed water isolating valve 5 and 1# main steam isolation valve 7 are closed, opened
First dump isolating valve 9 and main steam bypass valve group 13, and the steam water interface in 1# steam generator 2 is discharged into 1# accident
In blowdown vessel 11, main steam gland sealing steam supply valve group 14 is then opened, the main steam that 2# steam generator 4 exports is after pressure and temperature reducing
Supply high pressure cylinder 16 and 17 packing of low pressure (LP) cylinder；When 2# reactor 3 trigger emergency shut-down after, then close 2# main feed water isolating valve 6 and
2# main steam isolation valve 8, opens the second dump isolating valve 10 and main steam bypasses valve group 13, will be in 2# steam generator 4
Steam water interface be discharged into 2# dump tank 12, then open main steam gland sealing steam supply valve group 14,1# steam generator 2 is defeated
Main steam out supplies 17 packing of high pressure cylinder 16 and low pressure (LP) cylinder after pressure and temperature reducing；
After 1# reactor 1 and 2# reactor 3 trigger emergency shut-down, halt turbines simultaneously reduce revolving speed, close 1# master
Feedwater isolation valve 5,2# main feed water isolating valve 6,1# main steam isolation valve 7,2# main steam isolation valve 8 and steam turbine inlet valve group
15, the first dump isolating valve 9 and the second dump isolating valve 10 are opened, by 1# steam generator 2 and 2# steam generation
Steam water interface in device 4 is discharged into 1# dump tank 11 and 2# dump tank 12, opens simultaneously main steam bypass valve group
13 and main steam gland sealing steam supply valve group 14, by the main steam in main steam line for high pressure cylinder 16 and low pressure (LP) cylinder after pressure and temperature reducing
17 packings, and valve group 13 and the control main steam of main steam gland sealing steam supply valve group 14 are bypassed for the pressure and stream of packing by main steam
Amount, to meet unit requirement；After the steam water interface in 1# steam generator 2 and 2# steam generator 4 drains, 1# master is opened
Feedwater isolation valve 5,2# main feed water isolating valve 6,1# main steam isolation valve 7,2# main steam isolation valve 8, superheater entrance motor-driven valve
25, the cooling isolating valve 29 of superheater outlet regulating valve 27 and auxiliary steam is opened, the auxiliary steam that auxiliary electric boiler 24 exports according to
It is secondary through superheater entrance motor-driven valve 25, superheater 26, superheater outlet regulating valve 27, auxiliary steam non-return valve 28, auxiliary steam
Enter 1# steam generator 2 and 2# steam generation after cooling isolating valve 29,1# main feed water isolating valve 5 and 2# main feed water isolating valve 6
In device 4, and it is heated to be high-temperature steam in the heat absorbing side of 1# steam generator 2 and 2# steam generator 4, then respectively through the main steaming of 1#
Converge after vapour isolating valve 7 and 2# main steam isolation valve 8, then through main steam gland sealing steam supply valve group 14 after pressure and temperature reducing for high pressure
17 packing of cylinder 16 and low pressure (LP) cylinder, wherein superheater outlet regulating valve 27 can be passed through according to the load of steam turbine when emergency shut-down
And main steam gland sealing steam supply valve group 14 adjusts pressure of steam supply, temperature and the flow of high pressure cylinder 16 and 17 packing of low pressure (LP) cylinder, dynamic
Metal temperature with high pressure cylinder 16 under steam turbine different load, up to turbine speed coasting operation to zero speed.
Embodiment one
By taking certain domestic 200MW high temperature gas cooled reactor nuclear power unit as an example, the unit is by two block response heaps, two steam generations
Device, a Turbo-generator Set 18 are constituted.Wherein, the thermal power rating of two block response heaps is 500MW, steam generator outlet
Steam pressure is 14.1MPa, and outlet temperature is 570 DEG C, and steam turbine is double for the twin-tub being made of high pressure cylinder 16 and low pressure (LP) cylinder 17
Vapour condensing-type unit, specified operation steam parameter are as follows: 13.9MPa, 566 DEG C.Auxiliary Steam is by auxiliary electric boiler 24, overheat
The cooling isolation of device entrance motor-driven valve 25, superheater 26, superheater outlet regulating valve 27, auxiliary steam non-return valve 28, auxiliary steam
Valve 29 and auxiliary steam steam supply envelope isolating valve 30 form, the outlet vapor nominal parameter of Auxiliary Steam be 8t/h,
1.237MPa and 215-350 DEG C.The utility model specific implementation step is described as follows below in conjunction with application project:
In unit starting and during normal operation, 1# main feed water isolating valve 5,2# main feed water isolating valve 6, the isolation of 1# main steam
Valve 7,2# main steam isolation valve 8, steam turbine inlet valve group 15, attemperator regulating valve 21, packing overflow regulating valve 23, superheater enter
Mouth motor-driven valve 25, superheater outlet regulating valve 27 and auxiliary steam steam supply envelope isolating valve 30 are opened.First dump isolating valve
9, the second dump isolating valve 10, main steam bypass valve group 13, main steam gland sealing steam supply valve group 14 and auxiliary steam it is cooling every
It is closed from valve 29.
The main water supply of secondary circuit enters 2 He of 1# steam generator through 1# main feed water isolating valve 5 and 2# main feed water isolating valve 6 respectively
In 2# steam generator 4, primary Ioops heat is passed through 1# steam generator 2 and 2# steam by 1# reactor 1 and 2# reactor 3 respectively
The secondary side heating surface bank of generator 4 passes to secondary circuit water supply, secondary circuit water supply is heated become main steam after pass through respectively
1# main steam isolation valve 7,2# main steam isolation valve 8 and steam turbine inlet valve group 15 enter in high pressure cylinder 16 and low pressure (LP) cylinder 17, and
Generating set 18 is driven to generate electricity.
When steam turbine load is less than 50% rated load, (thermal parameter is the auxiliary steam that auxiliary electric boiler 24 exports
4t/h, 1.237MPa) successively through superheater entrance motor-driven valve 25, superheater 26, superheater outlet regulating valve 27 and auxiliary steam
Steam supply enters gland sealing steam supply main pipe after sealing isolating valve 30, is divided into two-way after being decompressed to 31kPa: entering in high pressure cylinder 16 for height all the way
Packing (for 215-350 DEG C of stripping temperature) is pressed, another way enters in low pressure (LP) cylinder 17 after direct-contact desuperheater 22 (to be supplied for low pressure packing
121-177 DEG C of stripping temperature), desuperheating water is supplied by condensate system 20 through attemperator regulating valve 21, and packing overflow steam is through packing
Overflow regulating valve 23 enters condenser 19.
When steam turbine load rises to 50%-100% unit rated load, turbine steam seal system realizes self-sealing, i.e.,
The packing vapour of low pressure (LP) cylinder 17, superheater entrance motor-driven valve 25, superheater outlet tune are provided by 16 gland leak-off of high pressure cylinder
It saves valve 27 and auxiliary steam steam supply envelope isolating valve 30 is closed, exit auxiliary steam for turbine steam seal system.
When a reactor triggers emergency shut-down, another normal reactor operation
By taking 1# reactor 1 as an example, 1 primary Ioops passive safety system of 1# reactor puts into rapidly and exports 1# reactor 1
The waste heat of reactor core closes rapidly 1# main feed water isolating valve 5 and 1# main steam isolation valve 7, by the first dump isolating valve and
Main steam bypasses valve group 13 and opens rapidly, the steam water interface in 1# steam generator 2 is discharged into 1# dump tank 11, together
When main steam bypass valve group 13 and steam turbine inlet valve group 15 automatically adjust 4 exit of 2# steam generator main steam pressure it is permanent
It is set to 13.9MPa.Main steam gland sealing steam supply valve group 14 is opened, vapour will be used as after 13.9MPa, 566 DEG C of main steam pressure and temperature reducing
Turbine packing standby steam source.When emergency shut-down, steam turbine load is less than 50% rated load, auxiliary electric boiler 24 is exported
Auxiliary steam (thermal parameter 4t/h, 1.237MPa) is successively through superheater entrance motor-driven valve 25, superheater 26, superheater outlet
Entering gland sealing steam supply main pipe after regulating valve 27 and auxiliary steam steam supply envelope isolating valve 30, turbine steam seal pressure of steam supply is 31kPa,
16 packing of high pressure cylinder is 215-350 DEG C for stripping temperature, and 17 packing of low pressure (LP) cylinder is 121-177 DEG C for stripping temperature.Stop when promptly
When steam turbine load is 50%-100% rated load when heap, main steam gland sealing steam supply valve group 14 enters gland sealing steam supply main pipe, vapour
Turbine gland sealing steam supply pressure is 31kPa, and the gland sealing steam supply temperature of high pressure cylinder 16 is 350-400 DEG C, the gland sealing steam supply of low pressure (LP) cylinder 17
Temperature is 121-177 DEG C.Desuperheating water is supplied by condensate system 20 through attemperator regulating valve 21, and packing overflow steam overflows through packing
It flows regulating valve 23 and enters condenser 19.
When two reactors trigger emergency shut-down, and steam turbine is stopped transport, the primary Ioops of 1# reactor 1 and 2# reactor 3 are non-
Active security system puts into rapidly and exports the waste heat of reactor core, 1# main feed water isolating valve 5,2# main feed water isolating valve 6,1#
Main steam isolation valve 7,2# main steam isolation valve 8 and steam turbine inlet valve group 15 are closed rapidly, the first dump isolating valve 9 and
Second dump isolating valve 10 is opened rapidly, and the steam water interface in 1# steam generator 2 and 2# steam generator 4 is distinguished
It is discharged into 1# dump tank 11 and 2# dump tank 12.Main steam bypasses valve group 13 and main steam gland sealing steam supply valve group 14 is fast
Speed is opened.By the main steam (13.9MPa, 566 DEG C) in main steam line for high pressure cylinder 16 and low pressure (LP) cylinder 17 after pressure and temperature reducing
Packing, wherein the gland sealing steam supply temperature of high pressure cylinder 16 is 350-400 DEG C, and the gland sealing steam supply temperature of low pressure (LP) cylinder 17 is 121-177
℃.Desuperheating water is supplied by condensate system 20 through attemperator regulating valve 21, packing overflow steam through packing overflow regulating valve 23 into
Enter in condenser 19.During this period, valve group 13 is bypassed by main steam and main steam gland sealing steam supply valve group 14 controls main steam steam supply
The pressure and flow of envelope meet unit requirement.
After the steam water interface in 1# steam generator 2 and 2# steam generator 4 drains, 1# main feed water isolating valve 5,2#
Main feed water isolating valve 6,1# main steam isolation valve 7,2# main steam isolation valve 8, superheater entrance motor-driven valve 25, superheater outlet tune
Section valve 27 and the cooling opening of isolating valve 29 of auxiliary steam, the auxiliary steam for assisting electric boiler 24 to export (8t/h, 1.237MPa,
215-350 DEG C) successively through superheater entrance motor-driven valve 25, superheater 26, superheater outlet regulating valve 27, auxiliary steam non-return valve
28, the cooling isolating valve 29 of auxiliary steam, 1# main feed water isolating valve 5 and 2# main feed water isolating valve 6 enter 1# steam generator 2 and 2#
In steam generator 4, and be heated to be in 1# steam generator 2 and 2# steam generator 4 high-temperature steam (8t/h, 1.237MPa,
350-450 DEG C), then the remittance of the outlet through 1# main steam isolation valve 7 and 2# main steam isolation valve 8 main steam pipe, through main steam
For 17 packing of high pressure cylinder 16 and low pressure (LP) cylinder after 14 pressure and temperature reducing of gland sealing steam supply valve group, the gland sealing steam supply pressure of steam turbine is 31kPa；
When emergency shut-down, steam turbine load is less than 50% rated load, the gland sealing steam supply temperature of high pressure cylinder 16 is 215-350 DEG C, low
The gland sealing steam supply temperature of cylinder pressure 17 is 121-177 DEG C.When emergency shut-down, the load of steam turbine is 50%-100% rated load
When, the gland sealing steam supply temperature of high pressure cylinder 16 is 350-400 DEG C, and the gland sealing steam supply temperature of low pressure (LP) cylinder 17 is 121-177 DEG C.Desuperheating water
It is supplied by condensate system 20 through attemperator regulating valve 21, packing overflow steam enters condenser 19 through packing overflow regulating valve 23
In, until turbine speed coasting operation completes 3 heap of 1# reactor 1 and 2# reactor during reactor emergency shut-down to zero speed
The cooling procedure of 4 secondary side of core, 1# steam generator 2 and 2# steam generator and the safety of steam turbine are stopped transport.
Claims (6)
1. a kind of secondary circuit security system for reactor emergency shut-down, which is characterized in that steamed including 1# reactor (1), 1#
Vapour generator (2), 2# reactor (3), 2# steam generator (4), condenser (19), high pressure cylinder (16), direct-contact desuperheater (22),
Low pressure (LP) cylinder (17), condensate system (20), auxiliary electric boiler (24), superheater (26) and generating set (18)；
The outlet of 1# reactor (1) is connected with the heat release side entrance of 1# steam generator (2), the outlet of 1# reactor (1) with
The heat release side outlet of 1# steam generator (2) is connected, the outlet of 2# reactor (3) and the cold side of 2# steam generator (4)
Entrance is connected, and the entrance of 2# reactor (3) is connected with the heat release side outlet of 2# steam generator (4), 1# steam generator
(2) heat absorption side outlet and the heat absorption side outlet of 2# steam generator (4) by the entrance of pipeline and Guan Houyu condenser (19),
The entrance of the entrance of high pressure cylinder (16) and the packing of high pressure cylinder (16) and direct-contact desuperheater (22) is connected, direct-contact desuperheater (22)
Outlet and the entrance of condenser (19) be connected with the packing of low pressure (LP) cylinder (17), the outlet of condensate system (20) subtracts with water spray
The cooling water inlet of warm device (22) is connected；The outlet of auxiliary electric boiler (24) is connected with the entrance of superheater (26), overheats
The outlet of device (26) and the heat absorbing side of the entrance of direct-contact desuperheater (22), the packing of high pressure cylinder (16), 1# steam generator (2) enter
The heat absorption side entrance of mouth and 2# steam generator (4) is connected；
The steam (vapor) outlet of high pressure cylinder (16) is connected with the steam inlet of low pressure (LP) cylinder (17), and high pressure cylinder (16), low pressure (LP) cylinder (17)
And generating set (18) is coaxially arranged.
2. the secondary circuit security system according to claim 1 for reactor emergency shut-down, which is characterized in that further include
1# dump tank (11) and 2# dump tank (12), wherein the entrance of 1# dump tank (11) is through the first dump
Isolating valve (9) is connected with the heat absorption side entrance of 1# steam generator (2), and the entrance of 2# dump tank (12) is through the second accident
Discharge isolating valve (10) is connected with the heat absorption side entrance of 2# steam generator (4).
3. the secondary circuit security system according to claim 2 for reactor emergency shut-down, which is characterized in that further include
1# main steam isolation valve (7), 2# main steam isolation valve (8), steam turbine inlet valve group (15) and main steam gland sealing steam supply valve group
(14)；
The heat absorption side outlet of 1# steam generator (2) is connected with one end of 1# main steam isolation valve (7), 2# steam generator
(4) heat absorption side outlet is connected with one end of 2# main steam isolation valve (8), the other end and 2# of 1# main steam isolation valve (7)
The other end of main steam isolation valve (8) is by pipeline and the entrance of Guan Houyu condenser (19), steam turbine inlet valve group (15)
One end and one end of main steam gland sealing steam supply valve group (14) are connected, the other end and high pressure cylinder of steam turbine inlet valve group (15)
(16) entrance is connected, the other end of main steam gland sealing steam supply valve group (14) and the packing and direct-contact desuperheater of high pressure cylinder (16)
(22) entrance is connected, wherein 1# main steam isolation valve (7) and 2# main steam isolation valve (8) by after pipeline and pipe through master
Steam by-pass valve group (13) is connected with the entrance of condenser (19).
4. the secondary circuit security system according to claim 3 for reactor emergency shut-down, which is characterized in that further include
Superheater entrance motor-driven valve (25), superheater outlet regulating valve (27), auxiliary steam non-return valve (28), the packing of auxiliary steam steam supply
From valve (30), auxiliary steam cooling isolating valve (29), 1# main feed water isolating valve (5) and 2# main feed water isolating valve (6)；
Assist the outlet of electric boiler (24) through superheater entrance motor-driven valve (25), superheater (26) and superheater outlet regulating valve
(27) it is connected afterwards with one end of one end of auxiliary steam non-return valve (28) and auxiliary steam steam supply envelope isolating valve (30), auxiliary is steamed
The other end of vapour non-return valve (28) is divided into two-way after auxiliary steam cooling isolating valve (29), wherein all the way through 1# master to water segregation
Valve (5) is connected with the heat absorption side entrance of 1# steam generator (2), and another way is sent out through 2# main feed water isolating valve (6) and 2# steam
The heat absorption side entrance of raw device (4) is connected, and auxiliary steam steam supply seals the other end of isolating valve (30) and the packing of high pressure cylinder (16)
And the entrance of direct-contact desuperheater (22) is connected.
5. the secondary circuit security system according to claim 1 for reactor emergency shut-down, which is characterized in that condensed water
It is connected between the outlet of system (20) and the cooling water inlet of direct-contact desuperheater (22) by attemperator regulating valve (21).
6. the secondary circuit security system according to claim 1 for reactor emergency shut-down, which is characterized in that condenser
(19) entrance is connected through packing overflow regulating valve (23) with the packing of low pressure (LP) cylinder (17).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109767852A (en) * | 2019-02-22 | 2019-05-17 | 西安热工研究院有限公司 | A kind of secondary circuit security system and its working method for reactor emergency shut-down |
| CN113719817A (en) * | 2021-08-26 | 2021-11-30 | 西安热工研究院有限公司 | High-temperature gas cooled reactor steam generator with blowdown function |
| CN113982700A (en) * | 2021-11-04 | 2022-01-28 | 华能山东石岛湾核电有限公司 | High temperature gas cooled reactor shaft seal steam supply system |
| CN114017759A (en) * | 2021-11-02 | 2022-02-08 | 华能山东石岛湾核电有限公司 | Cooling system of high-temperature gas cooled reactor nuclear power station |
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2019
- 2019-02-22 CN CN201920233202.9U patent/CN209591545U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109767852A (en) * | 2019-02-22 | 2019-05-17 | 西安热工研究院有限公司 | A kind of secondary circuit security system and its working method for reactor emergency shut-down |
| CN113719817A (en) * | 2021-08-26 | 2021-11-30 | 西安热工研究院有限公司 | High-temperature gas cooled reactor steam generator with blowdown function |
| CN114017759A (en) * | 2021-11-02 | 2022-02-08 | 华能山东石岛湾核电有限公司 | Cooling system of high-temperature gas cooled reactor nuclear power station |
| CN113982700A (en) * | 2021-11-04 | 2022-01-28 | 华能山东石岛湾核电有限公司 | High temperature gas cooled reactor shaft seal steam supply system |
| CN113982700B (en) * | 2021-11-04 | 2023-11-21 | 华能山东石岛湾核电有限公司 | High-temperature gas cooled reactor shaft seal steam supply system |
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