CN203966575U - The non-active cooling system of underground nuclear power station containment heat pipe - Google Patents
The non-active cooling system of underground nuclear power station containment heat pipe Download PDFInfo
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- CN203966575U CN203966575U CN201420316523.2U CN201420316523U CN203966575U CN 203966575 U CN203966575 U CN 203966575U CN 201420316523 U CN201420316523 U CN 201420316523U CN 203966575 U CN203966575 U CN 203966575U
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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 discloses the non-active cooling system of a kind of underground nuclear power station containment heat pipe, comprise the heat pipe that is filled with work solvent, heat pipe is connected to form by supervisor by evaporating branch pipe and condensation arm, evaporating branch pipe is around the outer wall of being close to containment in underground chamber, solidifying arm is placed in ventilating shaft, the horizontal level of condensation arm, higher than evaporating branch pipe, is responsible for to be being in tilted layout, and ventilating shaft bottom is communicated with underground gallery, top is communicated with ground ground chimney.The utility model can utilize the natural physical process of work solvent circulation heat absorption heat release derive containment heat energy and be discharged in atmosphere in nuclear plant severe accident situation, do not need driven by power, avoid electric system supply failure under accident conditions, the containment heat guiding system causing lost efficacy.And, by the buffer action of subterranean body and heat pipe itself, avoid radioactive leakage in underground nuclear power station containment cooling procedure.
Description
Technical field
The utility model relates to nuclear power technology, refers to particularly the non-active cooling system of a kind of underground nuclear power station containment heat pipe.
Background technology
Nuclear plant severe accident belongs to beyond design basis accident in nuclear power station design, and the probability of its generation is extremely low, once occur, damage sequence is extremely serious.Nuclear power station one circuit pressure border breakage in major accident, the cooling medium of High Temperature High Pressure poured in containment, and containment internal pressure and temperature are raise rapidly, jeopardizes the integrality of containment, as Fukushima, Japan nuclear accident in 2011.
In existing nuclear power station design, the problem raising for temperature in containment under major accident, main by introducing external water source to air cooling-down in containment outer wall or containment, as AP1000 nuclear power station utilizes the water tank of containment top setting to steel containment vessel spraying cooling.In this design, owing to adopting the outside cooling method in water source of introducing, have the problem of aqueous corrosion, and shower water flows down by gravity along containment outer wall, the part not reaching at containment outer wall chilled water easily forms hot zone, in addition, there is certain volume in the cooling water tank arranging, under accident, may occur the problem of insufficient water sources, and in the major accident later stage, can not ensure to continue to containment cooling.
Summary of the invention
The purpose of this utility model is to overcome the weak point of above-mentioned existing background technology, in conjunction with layout feature and the hot pipe technique of underground nuclear power station, a kind of underground nuclear power station non-passive safety shell cooling technology is proposed, can meet the cooling requirement of containment under major accident operating mode, the problem of the middle cooling water source deficiency that can avoid a nasty accident again, can also ensure major accident later stage containment continue non-actively cooling.
In order to overcome the defect existing in background technology, the non-active cooling system of a kind of underground nuclear power station containment heat pipe that the utility model is designed, comprise the heat pipe that is filled with work solvent, its special character is, described heat pipe is connected to form by supervisor by evaporating branch pipe and condensation arm, and described evaporating branch pipe is around the outer wall of being close to containment in underground chamber, and described condensation arm is placed in ventilating shaft, the horizontal level of described condensation arm is higher than evaporating branch pipe, and described supervisor is and is in tilted layout; Described ventilating shaft bottom is communicated with underground gallery, and described ventilating shaft top is communicated with ground ground chimney.
In technique scheme, described evaporating branch pipe is the semi-circular tube of multi-turn around containment.Multi-turn around semi-circular tube make the contact surface area maximum of evaporating branch pipe and containment.
In technique scheme, described condensation arm has multilayer, and every layer is multi-circle spiral flow shape spiral and arranges.The condensation arm surface area maximum that multi-circle spiral flow shape spiral is arranged, condensation effect is better.Condensation arm is arranged at least three layers.
In technique scheme, described supervisor's outer setting insulation casing.Insulation casing reduces heat scattering and disappearing in transmitting procedure.
In technique scheme, described supervisor's degree of tilt is 15 °～45 °.Supervisor is 15 °～45 ° and tilts to evaporating branch pipe, makes the low-temperature working solvent flowing out from condensation arm flow in evaporating branch pipe and heat fast.
In technique scheme, described work solvent is water or methyl alcohol.Water, methyl alcohol be specific heat capacity large, hold evaporable solvent, there is good heat-transfer effect.
In technique scheme, described evaporating branch pipe along containment outer wall around being covered with whole containment.Evaporating branch pipe is covered with whole containment can make the cooling velocity of containment faster.
In technique scheme, on described condensation arm, radiating fin is set, described radiating fin structure in the form of sheets, and vertical with condensation arm.Radiating fin is set, and can to accelerate work solvent in condensation arm cooling.
In technique scheme, between described adjacent radiating fin, be spaced apart 10～20cm.The radiating fin density of arranging arranges according to actual needs, as interval 10cm etc.
The utility model provides the Passive containment cooling system under a kind of underground nuclear power station major accident operating mode, under major accident operating mode, heat in containment is constantly exported in the ventilating shaft away from reactor building by heat pipe, constantly heat is discharged in atmosphere by the chimney effect of ventilating shaft.The utility model can utilize the natural physical process of work solvent circulation heat absorption heat release derive containment heat energy and be discharged in atmosphere in nuclear plant severe accident situation, do not need driven by power, avoid electric system supply failure under accident conditions, the containment heat guiding system causing lost efficacy.Meanwhile, owing to adopting the chimney effect heat extraction of ventilating shaft, in whole major accident process, the heat extraction of containment and cooling can be ensured, disappearance and the deficiency of cooling source needn't be worried.And, due to the good isothermal characteristics of heat pipe, avoid the local overheating defect of containment, and, by the buffer action of subterranean body and heat pipe itself, avoid radioactive leakage in underground nuclear power station containment cooling procedure.
Brief description of the drawings
Fig. 1 is the structural representation of the non-active cooling system of the utility model underground nuclear power station containment heat pipe;
In figure: 1. underground chamber, 2. containment, 3. ventilating shaft, 4. heat pipe, 4-1. evaporating branch pipe, 4-2. supervisor, 4-3. condensation arm, 5. insulation casing, 6. radiating fin, 7. underground gallery, 8. ground chimney, 9. ground.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail, but this embodiment should not be construed as restriction of the present utility model.
Under major accident operating mode, the temperature of the containment 2 in the underground chamber 1 of underground nuclear power station continues to increase, and the pressure in containment 2 raises rapidly, likely reaches the design pressure that even exceeds containment 2, thereby destroy the integrality of containment 2, discharge radiomaterial to environment.
The utility model utilizes underground advantage and the hot pipe technique of underground nuclear power station, in major accident, relies on the temperature difference of containment 2 and external environment condition, non-actively by the heat derivation containment 2 in containment 2, reaches the cooling object of containment 2.As shown in Figure 1, the non-active cooling system of a kind of underground nuclear power station containment heat pipe of the utility model comprises heat pipe 4, in heat pipe 4, maintain low pressure, and be filled with work solvent, concrete heat pipe 4 internal pressures and work solvent are looked specific requirement and are selected, as water, methyl alcohol etc., corresponding heat pipe material is copper, nickel, stainless steel etc.Heat pipe 4 is connected to form by supervisor 4-2 by evaporating branch pipe 4-1 and condensation arm 4-3.Evaporating branch pipe 4-1 is around the outer wall of being close to containment 2 in underground chamber 1.Evaporating branch pipe 4-1 is the semi-circular tube of multi-turn around containment 2, and circling ring is several according to heat dissipation capacity setting, at most can be along containment 2 outer walls around arranging full whole containment 2.Condensation arm 4-3 is placed in ventilating shaft 3.Condensation arm 4-3 is that multi-circle spiral flow shape spiral is arranged, and is arranged as more than three layers or three layers.On condensation arm 4-3, radiating fin 6 is set, radiating fin 6 structure in the form of sheets, and vertical with condensation arm 4-3, radiating fin 6 density of arranging arranges according to actual needs, as adjacent radiating fin 6 interval 10cm.The horizontal level of condensation arm 4-3 is higher than evaporating branch pipe 4-1, and supervisor 4-2 is and is in tilted layout, and the degree of tilt of supervisor 4-2 is 15 °～45 °, and the outside coated insulation casing 5 of supervisor 4-2, fills work solvent in heat pipe 4, form independently enclosure space, and keep infrabar.Ventilating shaft 3 bottoms are communicated with underground gallery 7, top is communicated with the ground chimney 8 on ground 9.
When major accident occurs, the interior temperature of containment 2 constantly raises, the evaporating branch pipe 4-1 that the is close to containment 2 outer walls intensification of being simultaneously heated.When temperature rise is to heat pipe 4 working temperatures, during as 60 degrees Celsius, the work solvent heat absorption evaporation in evaporating branch pipe 4-1, the steam after heat absorption is condensed into work solvent when condensation arm 4-3 place is by radiating fin 6 release heat.In this process, by heat absorption evaporation and the heat release condensation phase transition process of work solvent, the heat in containment 2 is exported in ventilating shaft 3.The cooling work solvent of condensation arm 4-3 is back to evaporating branch pipe 4-1 and completes a working cycle under Action of Gravity Field.Under containment 2 and the poor effect of ambient temperature, the work solvent in this heat pipe 4 constantly completes heat absorption and release process, the heat in containment 2 is constantly derived simultaneously.At the bottom of the ventilating shaft 3 at the bottom of ground is due to ground, temperature is low (as underground 100 meters of, constant temperature is about 20 degrees Celsius), air in ventilating shaft 3 is heated at condensation arm 4-3 place, hot-air ground chimney 8 from ground 9 under density difference effect is discharged, simultaneously, due to the swabbing action of chimney effect, outside air constantly adds in ventilating shaft 3 from underground gallery 7, completes uninterruptedly cooling to condensation arm 4-3.
Other unspecified part is prior art.
Claims (10)
1. the non-active cooling system of underground nuclear power station containment heat pipe, comprise the heat pipe (4) that is filled with work solvent, it is characterized in that: described heat pipe (4) is connected to form by supervisor (4-2) by evaporating branch pipe (4-1) and condensation arm (4-3), described evaporating branch pipe (4-1) is around the outer wall of being close to containment (2) in underground chamber (1), described condensation arm (4-3) is placed in ventilating shaft (3), the horizontal level of described condensation arm (4-3) is higher than evaporating branch pipe (4-1), described supervisor (4-2) is and is in tilted layout, described ventilating shaft (3) bottom is communicated with underground gallery (7), and described ventilating shaft (3) top is communicated with the ground chimney (8) on ground (9).
2. the non-active cooling system of underground nuclear power station containment heat pipe according to claim 1, is characterized in that: described evaporating branch pipe (4-1) is for multi-turn is around the semi-circular tube of containment (2).
3. the non-active cooling system of underground nuclear power station containment heat pipe according to claim 1, is characterized in that: described condensation arm (4-3) has multilayer, and every layer is multi-circle spiral flow shape spiral and arranges.
4. the non-active cooling system of underground nuclear power station containment heat pipe according to claim 1, is characterized in that: described supervisor (4-2) outer setting insulation casing (5).
5. according to the non-active cooling system of underground nuclear power station containment heat pipe described in claim 1 or 4, it is characterized in that: described supervisor's (4-2) degree of tilt is 15 °～45 °.
6. the non-active cooling system of underground nuclear power station containment heat pipe according to claim 1, is characterized in that: described work solvent is water or methyl alcohol.
7. the non-active cooling system of underground nuclear power station containment heat pipe according to claim 2, is characterized in that: described evaporating branch pipe (4-1) along containment (2) outer wall around being covered with whole containment (2).
8. the non-active cooling system of underground nuclear power station containment heat pipe according to claim 3, it is characterized in that: radiating fin (6) is set on described condensation arm (4-3), described radiating fin (6) structure in the form of sheets, and vertical with condensation arm (4-3).
9. the non-active cooling system of underground nuclear power station containment heat pipe according to claim 3, is characterized in that: described condensation arm (4-3) is at least three layers.
10. the non-active cooling system of underground nuclear power station containment heat pipe according to claim 8, is characterized in that: between described adjacent radiating fin (6), be spaced apart 10～20cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420316523.2U CN203966575U (en) | 2014-06-13 | 2014-06-13 | The non-active cooling system of underground nuclear power station containment heat pipe |
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| CN201420316523.2U CN203966575U (en) | 2014-06-13 | 2014-06-13 | The non-active cooling system of underground nuclear power station containment heat pipe |
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| CN203966575U true CN203966575U (en) | 2014-11-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064232A (en) * | 2014-06-13 | 2014-09-24 | 长江勘测规划设计研究有限责任公司 | Passive cooling system for underground nuclear power station containment heat pipe |
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2014
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064232A (en) * | 2014-06-13 | 2014-09-24 | 长江勘测规划设计研究有限责任公司 | Passive cooling system for underground nuclear power station containment heat pipe |
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