CN202887751U - Kinetic and passive combined injection heat leading-out device of reactor core - Google Patents

Kinetic and passive combined injection heat leading-out device of reactor core Download PDF

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Publication number
CN202887751U
CN202887751U CN2012205096223U CN201220509622U CN202887751U CN 202887751 U CN202887751 U CN 202887751U CN 2012205096223 U CN2012205096223 U CN 2012205096223U CN 201220509622 U CN201220509622 U CN 201220509622U CN 202887751 U CN202887751 U CN 202887751U
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China
Prior art keywords
safety injection
reactor core
loop
actively
pipeline
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Withdrawn - After Issue
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CN2012205096223U
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Chinese (zh)
Inventor
于勇
袁霞
赵侠
蒋慧黠
张雪霜
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China Nuclear Power Engineering Co Ltd
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China Nuclear Power Engineering Co Ltd
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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

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Abstract

The utility model belongs to the technology of design of a reactor, and particularly relates to a kinetic and passive combined injection heat leading-out device of a reactor core. The kinetic and passive combined injection heat leading-out device structurally comprises a safe injection pipeline which is respectively connected with a reloading water tank and cold and hot pipe sections of a loop, wherein a safety injection pump is arranged on the safe injection pipeline; the safety injection pump comprises two medium-pressure safety injection pumps which are independent from each other, and two low-pressure safety injection pumps which are independent from each other; the reloading water tank is arranged at the position of a pit below the reactor core inside a safe shell; the safety injection pumps are arranged outside the safe shell; a passive safety injection box and a reactor core water supply tank are also arranged above the reactor inside the safe shell; the safety injection box is connected with the cold pipe section of the loop through the pipeline provided with the control valve; and the reactor core water supply tank is connected between the hot pipe section and the cold pipe section of the loop through the pipeline provided with the control valve. The kinetic and passive combined injection heat leading-out device has the advantages of kinetic and passive combination, redundancy, diversity, high reliability and the like, and the safety of a nuclear power plant is improved.

Description

A kind of actively with the non-reactor core water filling heat let-off gear(stand) that actively combines
Technical field
The utility model belongs to the reactor designing technique, be specifically related to a kind of actively with the non-reactor core water filling heat let-off gear(stand) that actively combines.
Background technology
As the engineered safeguards features of PWR nuclear power plant, when design basis accident occured, active safety injection system can provide lasting cooling for reactor core, and the mode by long-term circulation derives the heat in the reactor core.When having an accident, high-pressure safety injection pump is received and is automatically started after peace is annotated signal, from the material-changing water tank suction, with boron water piii reactor coolant system; Inject the stage in recycle, the low pressure safety injection pump absorbs water from melt pit, thereby realizes long-term recycle injection.The structure of existing reactor safety injected system as shown in Figure 1, material-changing water tank 1 places containment outside, connect the hot and cold pipeline section in a loop by pipeline, high-pressure safety injection pump 2 and low pressure safety injection pump 3 are set on the pipeline, low pressure safety injection pump 3 also connects containment sump 4 by pipeline.
Comprised also that in the safety injection system of traditional PWR nuclear power plant non-active peace annotates the chest system, after occuring, accident drops to peace notes case pressure when following when the pressure of reactor coolant loop, the boron water that peace is annotated in the case is injected into reactor coolant loop automatically under the effect of nitrogen pressure, for reactor core provides emergent cooling.As shown in Figure 2,1 is material-changing water tank among the figure, and 5 are peace notes case.
In the non-active core cooling system of generation Ⅲ nuclear power unit AP1000, except annotating case, peace also used non-active Core makeup tank, its entrance and exit links to each other with the direct ascending pipe of pressure vessel with a loop cold leg respectively, after accident, inject boron water to a loop by natural circulation mode, with the water loading amount of keeping a loop and alleviate reactivity transients.As shown in Figure 3, the entrance of Core makeup tank 6 connects a loop cold leg, the direct ascending pipe of its outlet Bonding pressure container 7, and 5 are peace notes case among the figure.
The tradition safety injection system of PWR nuclear power plant and non-active Core makeup tank all can't fully guarantee the safe and reliable of nuclear power station under the multiple accident conditions, therefore, need to reasonably integrate these systems, the design main points in conjunction with new further improve the security of system redundancy.
The utility model content
The purpose of this utility model is for the deficiencies in the prior art, and a kind of advanced technology, safe, the active and non-reactor core water filling heat let-off gear(stand) that actively combines that can tackle multiple accident conditions are provided.Both can the heat in the reactor core be derived by mode active, long-term circulation, again can be in the situation of station blackout, realize long-term cooling to reactor core in non-active mode.
The technical solution of the utility model is as follows: a kind of actively with the non-reactor core water filling heat let-off gear(stand) that actively combines, comprise the Safety Injection pipeline that is connected with the hot and cold pipeline section in material-changing water tank and a loop respectively, the Safety Injection pipeline is provided with safety injection pump, wherein, described material-changing water tank is arranged on melt pit position, containment inner reactor core below, and safety injection pump is arranged on the containment outside; Above containment internal reaction heap, also be provided with non-active peace and annotate case and Core makeup tank, described peace is annotated case and is connected with the cold leg in a loop by the pipeline that is provided with by-pass valve control, and described Core makeup tank is connected between the heat pipe section and cold leg in a loop by the pipeline that is provided with by-pass valve control.
Further, aforesaid actively with the non-reactor core water filling heat let-off gear(stand) that actively combines, wherein, described safety injection pump comprises two separate middle pressure safety injection pumps and two separate low pressure safety injection pumps, and four safety injection pumps are arranged in parallel at the Safety Injection pipeline.
Further, aforesaid actively with the non-reactor core water filling heat let-off gear(stand) that actively combines, wherein, the injection pressure head scope of described middle pressure safety injection pump is 600mWC ~ 1100mWC, the injection pressure head scope of low pressure safety injection pump is 90mWC ~ 180mWC.
Further, aforesaid active and the non-reactor core water filling heat let-off gear(stand) that actively combines, wherein, described peace notes case has three, separate setting; Every peace is annotated case and is provided with isolation valve and non-return valve with the pipeline that the cold leg in a loop is connected.
Further, aforesaid actively with the non-reactor core water filling heat let-off gear(stand) that actively combines, wherein, described Core makeup tank has three, separate setting; The entrance of every Core makeup tank links to each other with the heat pipe section in a loop by the pressure-equalizing line of often opening, and its outlet is connected on the loop cold leg by isolation valve and non-return valve.
The beneficial effects of the utility model are as follows: reactor core water filling heat let-off gear(stand) provided by the utility model adopts actively and the non-mode that actively combines, can use multiple means to derive heat to the reactor core water filling after accident: peace is annotated case can provide the peace notes of high flow capacity to flood rapidly reactor core at short notice, guarantees fast cooling reactor core; Core makeup tank can provide within the long time than the peace of low discharge by the mode of Natural Circulation and annotate; Active safety injection pump can be kept core deluge, and constantly derives the reactor core heat by the mode of long-term circulation.Built-in material-changing water tank is positioned at the inner lowest part of containment, has reduced outside disaster to the impact of material-changing water tank security, has improved the reliability at emergent water source after the accident.Safety injection pump has reduced injection pressure head (becoming pressure by high pressure), can effectively reduce high-pressure safety injection error starting damage sequence, avoid a circuit pressure too high, also can alleviate or avoid the too high and steam generator spill-over that may cause of next circuit pressure of steam generator tube rupture accident, thereby reduce under this accident radiomaterial to the possibility of environmental emission.
Description of drawings
Fig. 1 is high pressure of the prior art and low head injection system synoptic diagram;
Fig. 2 is that peace of the prior art is annotated case injected system synoptic diagram;
Fig. 3 is Core makeup tank set-up mode synoptic diagram of the prior art;
Fig. 4 be of the present utility model actively with the non-reactor core water filling heat let-off gear(stand) synoptic diagram that actively combines.
Embodiment
Provided by the utility modelly actively adopted active middle pressure safety injection pump and low pressure safety injection pump with the non-reactor core water filling heat let-off gear(stand) that actively combines, non-active peace is annotated case and Core makeup tank, and the built-in material-changing water tank of containment.
The active part of reactor core water filling heat let-off gear(stand) specifically can arrange two separate middle pressure safety injection pumps and two separate low pressure safety injection pumps.Middle pressure safety injection pump and low pressure safety injection pump all by the pipeline that is provided with by-pass valve control be connected to built-in material-changing water tank and a loop cold/the heat pipe section between.Safety injection pump to the incipient stage of reactor-loop water filling be cold section injection, until after the long-term cooling, just begin cold and hot section simultaneously injection.
Originally M310 heap type on fill pump and double as simultaneously high-pressure safety injection pump, the utility model with on fill with the peace pouring functions and separate, cancel high-pressure safety injection pump, set up middle pressure safety injection pump.When former M310 heap type occurred at peace notes signal, pump switched to the peace injection-molded from upper mold filling formula, and this handoff procedure need operate a large amount of valves, will have influence on the reliability of system.The utility model arranges after the special-purpose middle pressure safety injection pump, carries out function singleness, can improve the reliability of system.Safety injection pump has reduced the injection pressure head and (has become pressure by high pressure, inject the pressure head scope and be 600mWC ~ 1100mWC), can effectively reduce high-pressure safety injection error starting damage sequence, avoid a circuit pressure too high, also can alleviate or avoid the too high and steam generator spill-over that may cause of next circuit pressure of steam generator tube rupture accident, thereby reduce under this accident radiomaterial to the possibility of environmental emission.
Built-in material-changing water tank is positioned at the inner lowest part of containment--melt pit position, reactor core below, reduced outside disaster to the impact of material-changing water tank security, and improved the reliability at emergent water source after the accident, improved npp safety.In the situation that nuclear power station has an accident, if adopt external material-changing water tank, safety injection system need to carry out blocked operation under liquid level gauge cooperates.The built-in rear water source that brings from container spray, pipeline cut that conveniently compiles of material-changing water tank combines with the melt pit of reactor, has played the effect of simplified apparatus, no longer needs to carry out blocked operation.Because built-in material-changing water tank will be as the unique active peace water filling source after the accident, contingent mistake has been avoided in operation after can the minimizing accident, has reduced the potential risk of system running pattern switching failure, thereby improved the reliability of system, strengthened the security of power plant.
Below in conjunction with drawings and Examples the utility model is described in detail.
As shown in Figure 4, actively with the non-reactor core water filling heat let-off gear(stand) that actively combines, comprise the material-changing water tank 8 that is arranged on melt pit position, containment inner reactor core below, be connected by the Safety Injection pipeline between the hot and cold pipeline section in material-changing water tank 8 and a loop, the Safety Injection pipeline is provided with two separate middle pressure safety injection pumps 9 and two separate low pressure safety injection pumps 10, four safety injection pumps are arranged in parallel at the Safety Injection pipeline, are positioned at the containment outside.Certainly, the quantity of middle pressure safety injection pump 9 and low pressure safety injection pump 10 is not limited to two.The injection pressure head scope of middle pressure safety injection pump is 600mWC ~ 1100mWC, and the injection pressure head scope of low pressure safety injection pump is 90mWC ~ 180mWC
After accident occured, system received peace notes signal and just presses safety injection pump 9 and low pressure safety injection pump 10 in the immediately startup.Safety injection pump utilizes miniflow line to start at first, when the reactor coolant loop pressure drop to middle pressure safety injection pump close under the injection pressure time, middle pressure safety injection pump begins to provide injection to reactor coolant loop.When reactor coolant loop pressure drop to be lower than the low pressure safety injection pump close lift the time, the low pressure safety injection pump begins to provide injection to reactor coolant loop.
In containment, also be provided with non-active peace and annotate case 11 and Core makeup tank 12, described peace is annotated case 11 and is connected with the cold leg 15 in a loop by the pipeline that is provided with by-pass valve control, every peace is annotated case 11 and is provided with isolation valve and non-return valve with the pipeline that the cold leg 15 in a loop is connected, and described Core makeup tank 12 is connected between the heat pipe section 16 and cold leg 15 in a loop by the pipeline that is provided with by-pass valve control.14 is steam generator among the figure.Present embodiment can arrange three separate peaces and annotate case 11 and three separate Core makeup tanks 12, has only drawn a series among Fig. 4.
Peace is annotated case 11 and is connected to by the pipeline that is provided with by-pass valve control on the cold leg of three loops in a loop, and automatic opens check valve when a circuit system pressure is low is injected reactor core with water.The most of space of peace notes case is occupied by boron water and by the nitrogen pressurization, pressured contracting nitrogen provides driving pressure, when a circuit pressure is low, can injects to reactor pressure vessel the boron water of high flow capacity, thereby cool off rapidly reactor core.
Core makeup tank 12 is higher than the reactor core setting, its entrance links to each other with loop main leg's hot arc by the pressure-equalizing line of often opening, thereby keep the pressure that Core makeup tank is in a loop, water hammer occurs when preventing that Core makeup tank from beginning to inject, and the Core makeup tank outlet is connected on the loop cold leg by isolation valve and non-return valve.Boron coolant-temperature gage in the Core makeup tank is identical with the containment environment temperature.Isolation valve is opened under the accident conditions, the gravity head that Core makeup tank produces by difference in height, with cooling medium along a loop cold section injection pressure container, the water level that compensates a loop descends, and keeps submergence and the waste heat of reactor core and derives.If a loop is difficult to smooth release under the accident conditions, non-active Core makeup tank utilizes the connection effect of pressure-equalizing line, and total energy keeps certain drive ram, thereby has guaranteed under the high pressure operating mode Safety Injection to a loop.
Core makeup tank can have two kinds of operational modes: water circulation pattern and steam alternating pattern.Under the water circulation pattern, enter Core makeup tank from the hot water of heat pipe section, the cold water in the case enters a loop, and this will make a loop boronation and increase its water loading amount.Under the steam alternating pattern, steam enters Core makeup tank by pressure line, and the water in a loop is injected in compensation.The operational mode of Core makeup tank depends on the situation in a loop.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technology thereof, then the utility model also is intended to comprise these changes and modification interior.

Claims (7)

  1. One kind actively with the non-reactor core water filling heat let-off gear(stand) that actively combines, comprise the Safety Injection pipeline that is connected with the hot and cold pipeline section in material-changing water tank (8) and a loop respectively, the Safety Injection pipeline is provided with safety injection pump, it is characterized in that: described material-changing water tank (8) is arranged on melt pit position, containment inner reactor core below, and safety injection pump is arranged on the containment outside; Above containment internal reaction heap, also be provided with non-active peace and annotate case (11) and Core makeup tank (12), described peace is annotated case (11) and is connected with the cold leg (15) in a loop by the pipeline that is provided with by-pass valve control, and described Core makeup tank (12) is connected between the heat pipe section (16) and cold leg (15) in a loop by the pipeline that is provided with by-pass valve control.
  2. As claimed in claim 1 actively with the non-reactor core water filling heat let-off gear(stand) that actively combines, it is characterized in that: described safety injection pump comprises two separate middle pressure safety injection pumps (9) and two separate low pressure safety injection pumps (10), and four safety injection pumps are arranged in parallel at the Safety Injection pipeline.
  3. As claimed in claim 2 actively with the non-reactor core water filling heat let-off gear(stand) that actively combines, it is characterized in that: the injection pressure head scope of described middle pressure safety injection pump is 600mWC ~ 1100mWC, the injection pressure head scope of low pressure safety injection pump is 90mWC ~ 180mWC.
  4. 4. such as any one among the claim 1-3 described active and the non-reactor core water filling heat let-off gear(stand) that actively combines, it is characterized in that: described peace notes casees (11) have three, separate setting.
  5. 5. active and the non-reactor core water filling heat let-off gear(stand) that actively combines as claimed in claim 4, it is characterized in that: every peace notes casees (11) are provided with isolation valve and non-return valve with the pipeline that the cold leg (15) in a loop is connected.
  6. As any one among the claim 1-3 described actively with the non-reactor core water filling heat let-off gear(stand) that actively combines, it is characterized in that: described Core makeup tank (12) has three, separate setting.
  7. As claimed in claim 6 actively with the non-reactor core water filling heat let-off gear(stand) that actively combines, it is characterized in that: the entrance of every Core makeup tank (12) links to each other with the heat pipe section (16) in a loop by the pressure-equalizing line of often opening, and its outlet is connected on the loop cold leg (15) by isolation valve and non-return valve.
CN2012205096223U 2012-09-27 2012-09-27 Kinetic and passive combined injection heat leading-out device of reactor core Withdrawn - After Issue CN202887751U (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102903403A (en) * 2012-09-27 2013-01-30 中国核电工程有限公司 Active and non-active combined core water injection heat lead-out device
CN108962407A (en) * 2018-06-13 2018-12-07 上海核工程研究设计院有限公司 A kind of advanced Core makeup tank structure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102903403A (en) * 2012-09-27 2013-01-30 中国核电工程有限公司 Active and non-active combined core water injection heat lead-out device
WO2014048292A1 (en) * 2012-09-27 2014-04-03 中国核电工程有限公司 Combined active and passive reactor core water injection and heat removal apparatus
CN102903403B (en) * 2012-09-27 2016-04-06 中国核电工程有限公司 A kind of active and non-active reactor core water filling heat derivation device combined
CN108962407A (en) * 2018-06-13 2018-12-07 上海核工程研究设计院有限公司 A kind of advanced Core makeup tank structure
CN108962407B (en) * 2018-06-13 2024-02-02 上海核工程研究设计院股份有限公司 Advanced reactor core water supplementing tank structure

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C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20130417

Effective date of abandoning: 20160406

C25 Abandonment of patent right or utility model to avoid double patenting