CN201546235U - Nuclear power plant nuclear island structure base isolation device with locking function - Google Patents
Nuclear power plant nuclear island structure base isolation device with locking function Download PDFInfo
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- CN201546235U CN201546235U CN 200920167910 CN200920167910U CN201546235U CN 201546235 U CN201546235 U CN 201546235U CN 200920167910 CN200920167910 CN 200920167910 CN 200920167910 U CN200920167910 U CN 200920167910U CN 201546235 U CN201546235 U CN 201546235U
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Abstract
The utility model belongs to the technical field of nuclear power plant nuclear island structure civil construction, particularly relates to a nuclear power plant nuclear island structure base isolation device with locking function and aims at promoting the capability of the nuclear power plant in countering a hyper design basis earthquake by applying the shake isolating effect of a shake isolating cushion with a locking device. The base isolation device is arranged between a concrete stand on a bottom plate and an upper bottom plate of a nuclear island raft foundation plate. The base isolation device comprises the shake isolating cushion and the locking device that are arranged in parallel, wherein the shake isolating cushion is a laminated rubber cushion with a pencil lead; the locking device comprises an upper supporting part and a lower supporting part, the joints of which are respectively an upper connecting hole plate (1) and a lower connecting hole plate (2) that are connected together through a screw rod; and a way of shearing the screw rod is adopted to open the locking device. The base isolation device has the advantages of not only being capable of promoting the capability of the nuclear power plant in countering the hyper design basis earthquake, but also reducing the risk caused by large displacement to the maximum degree by setting the adjustment of threshold values.
Description
Technical field
The utility model belongs to nuclear power plant's nuclear island structure civil engineering technical field, specifically is the civil engineering seismic isolation technology field of nuclear power plant's nuclear island structure.
Background technology
At the eighties initial stage, French EDF finds that when receiving the design order of South Africa Koeberg nuclear power plant and Iranian Karun river nuclear power plant the design basis earthquake SSE of customer requirements is 0.3g, and this has exceeded the scope of the benchmark earthquake 0.2g of the original type design of EDF.For taking all factors into consideration of various factors, EDF is under the experts' of unit such as the U.S. state-run test room of Argonne support, decision only adopts the method that adds the shock insulation pad to adapt to the requirement of high earthquake value in the design order under the nuclear island architecture basics under the prerequisite that does not change a complete set of type design of EDF.
From the effect of French nuclear power plant base isolation design, (see " On the French NuclearIndustry Experience in the Design of seismic Isolation of Nuclear Power Plants ".Argonne National Laboratory, Illinois) input of the earthquake after design load (acceleration) is though can increase to original 1.5 times, this is very successful, but the big displacement of association simultaneously may cause the outdoor pipeline fracture of turnover nuclear island, and this is the hidden danger that did not have fine solution at that time.
On July 16th, 2007,6.8 grades of earthquakes that the Niigata County, Japan takes place cause near the Bai Qi the earthquake centre to cut the actual measurement earthquake that plumage nuclear power plant has stood to surpass 1.5～2.0 times of original design basises (being equivalent to SSE), caused the great concern of countries in the world, it seems that the possibility of the original design basis earthquake of standard can take place to surpass really for nuclear power plant site from now on.
To surpassing the consideration of design basis earthquake, the habitual gimmick of nuclear power engineering design is not change under the original a complete set of type design prerequisite of nuclear island structure and inner facility, only adopts the basis that the shock insulation cushion device is set down and promotes the super original design basis earthquake SSE of nuclear power plant and be roughly 1.5～2.0 times ability.
In traditional nuclear island base isolation design, the seismic load of superstructure (acceleration) is though can be effectively reduced, but the significantly increase that brings the earthquake displacement of structure simultaneously, so that in the non-isolation design of script, can bear safely, under the higher again medium-scale seismic events of probability of happening, because of its displacement exceed same non-shock insulating foundation cause more than 10 times many turnover nuclear islands outdoor pipelines rupture in the nuclear island junction, cause a series of medium and small secondary accidents, this is the drawback that must bring when reducing seismic load during traditional nuclear island base isolation designs.
For the traditional design of nuclear island architecture basics shock insulation that blocking device is not set, it no doubt has the isolating affection that reduces load to violent earthquake that it surpasses primary standard design earthquake, but simultaneously also since the fundamental frequency of isolation structure reduce, according to displacement d=a/ ω
2Relation causes exceeding the big displacement association and cause the risk of the secondary accident that the outdoor pipeline fracture causes more than 10 times of originally same non-shock insulating foundation structure.To point out that simultaneously these secondary accidents singly do not take place and are present in the medium-scale and more seismic events of probability of happening in factory site in violent earthquake.The fracture of wherein the most serious the is essential service water pipeline in those second generation nuclear power plants more can the initiated core security incident.The isolation design of briefly, traditional nuclear island architecture basics is brought bigger unfavorable factor simultaneously.
The utility model content
The purpose of this utility model is the influence at from now on super design reference earthquake, under the type design prerequisite of not changing a nuclear island structure and an inner facility complete set, when the isolating affection of the shock insulation pad of utilization band blocking device promotes nuclear power plant to super design reference earthquake (be roughly former design basis 1.5～2.0 times) ability, by the adjustment of blocking device threshold value being set, reducing big displacement to greatest extent the risk that is caused.
The utility model is achieved in that a kind of nuclear power plant's nuclear island architecture basics earthquake isolating equipment with blocking function, wherein, described base isolation device is installed between the concrete bearing and nuclear island raft foundation plate upper plate that is arranged on the lower shoe, described base isolation device comprises shock insulation pad and the blocking device that be arranged in parallel, and the shock insulation pad is the laminated rubber bearing of band lead for retractable pencil; Blocking device comprises up and down two support portions, up and down the joint of two support portions be respectively go up connect orifice plate and under be connected orifice plate, both link together by screw rod, when blocking device was opened, employing was cut off the mode of screw rod and is opened.
Aforesaid a kind of nuclear power plant's nuclear island architecture basics earthquake isolating equipment with blocking function, wherein, the quantity of screw rod is 4.
Aforesaid a kind of nuclear power plant's nuclear island architecture basics earthquake isolating equipment with blocking function, wherein, described screw rod adopts B level burnished bolt, and processes cutting in advance at the theoretical surface of shear place of bolt.
The utility model has the advantages that:
(1) this patent design philosophy that adopts blocking device to unite configuration considers to be provided with the unfavorable factor of shock isolating pedestal pad just at traditional nuclear island architecture basics light.Can between two Seismic Design rank OBE (SL-1) and SSE (SL-2), regulate arbitrarily according to the seismoilogical background of nuclear power plant site for the selected of locking threshold value.
(2) seismic design of nuclear power standard requires all at carrying out by the SSE requirement at present.If the locking threshold value is set at the determined SSE value of nuclear power plant site, under the low probability geological process that SSE met in this 10000 years, still be in blocking after adopting this patent so, though under the basis how one deck shock insulation pad, but the behavior of the nuclear island structure still conventional design when originally the shock insulation pad not being set is the same, do not have the risk of line break yet, all meet the various requirement of existing design specifications.This kind situation is provided with the shock insulation pad just for to nuclear power plant's further considering of seismic safety from now on.
(3) main purpose of this patent application is at the occasion that surpasses original design basis earthquake incident of determining, the design of nuclear power plant structure base isolation also can bring the unfavorable factor of big displacement simultaneously.After adopting device described in the utility model, for the nuclear power plant of the third generation with non-active theory design, owing to do not belong to the essential service water system of safe level, even have big displacement to cause the pipeline break also will never the initiated core security incident, moreover because the locking threshold value have been got rid of the possibility that the higher seismic events of most of probability of happening causes pipeline break.Therefore using this patent can reach the best safety effect.
To second generation nuclear power plant owing to have an essential service water pipeline that belongs to safe level, adopt device described in the utility model back that the factory site is taken place in the super design reference earthquake of extremely low probability, it can bring into play the important task that shock insulation is saved nuclear island safety overall situation from damage, the secondary accident that this moment, the part line break caused has been side effect, and in the higher medium-scale seismic events of factory site probability of happening because by locking, can not produce the big displacement that traditional isolation design is brought, this has just reduced the higher secondary accident risk level of this probability of happening effectively.Also can embody the actual effect that it reduces the pipeline break risk even therefore in the design of second generation nuclear power plant, use this patent.
Description of drawings
Fig. 1 is nuclear power plant's nuclear island architecture basics earthquake isolating equipment structural representation of band blocking function;
Fig. 2 is the blocking device schematic diagram.
Wherein, connect on 1. orifice plate, 2. time connect orifice plate, 3. screw rod, 4. blocking device, 5. upper plate (former nuclear island raft foundation plate), 6. lower shoe, 7. shock insulation pad, 8. concrete bearing.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described further:
As shown in Figure 1, the utility model is a kind of nuclear power plant's nuclear island architecture basics earthquake isolating equipment with blocking function, wherein, described base isolation device is installed between the concrete bearing and nuclear island raft foundation plate upper plate that is arranged on the lower shoe, described base isolation device comprises shock insulation pad and blocking device, blocking device is realized just opening automatically after extraneous seismic load reaches its locking threshold value, makes the shock insulation pad begin to play function of shock insulation;
To shock insulation pad product, can use on the market any one, preferably adopt the laminated rubber bearing of popular band lead for retractable pencil; And ad hoc supporting blocking device, preferred decision blocking device adopts the mode of cutting off to open, using this kind mode is to consider any direction of cutting off energy adaptation level earthquake of screw rod, as shown in Figure 2, blocking device comprises up and down two support portions, up and down the joint of two support portions be respectively go up connect orifice plate 1 with under be connected orifice plate 2, both link together by screw rod 3, when blocking device is opened, adopt the mode of cutting off screw rod to open;
The quantity of screw rod can be considered 4, and earthquake locking threshold values can be by the diameter adjustment of screw rod.
Earthquake or earthquake grade are very not low taking place at ordinary times, and when blocking device did not need to open, the shock insulation pad did not play function of shock insulation, but played the effect of fixed support.
Why nuclear power plant's nuclear island structure considers to be provided with shock insulating foundation, this is that environment for earthquake has exceeded its original type design, and don't thinks to change easily technical measures of just considering when whole nuclear island comprises a complete set of type design of the especially inner numerous nuclear facilities of civil engineering structure.
As in traditional shock isolating pedestal design, supporting blocking device being set simultaneously, after only allowing extraneous seismic load (acceleration) to reach to open automatically under its locking threshold value, it just plays function of shock insulation, what this had just guaranteed that the effect of base isolation only brings into play just under the calamitous special violent earthquake of extremely low probability that it saves nuclear island safety overall situation from damage should have effect, and it has been side effect that the special violent earthquake disaster is compared in some fracture that passes in and out nuclear island pipeline this moment.And the shock insulating foundation that adopts this patent because the secondary accident of pipeline break can not taken place by locking the shock isolating pedestal pad, thereby also can reduce the risk of pipeline break to greatest extent in the higher medium-scale seismic events of probability of happening.
What be worth prompting is to adopt base isolation, makes the seismic load (acceleration) of superstructure effectively reduce the common recognition that this is traditional isolation design.The amplitude target that reduces then depends on the performance of shock insulation pad product and the reasonable tradeoff of isolation design.In nuclear power plant's isolation design, remain unchanged with the original antidetonation type design that keeps most important nuclear facilities, and only be in antidetonation that basement part facility done and check that workload is less to be only only criterion for the overall consideration of prerequisite, the definite of isolating affection do not related at this patent emphasis, and 1.5～2.0 times of isolating affections that proposed are set just only for reference according to the empirical value of selecting for use in our the shock insulation conceptual design to the nuclear island structure.The effect of device described in the utility model mainly is to embody to guarantee the reasonable control of displacement reducing the risk of pipeline break, because this is the field of fine concern not as yet in the traditional in the past isolation design.
The control of displacement is mainly reflected in the selected of locking threshold value.The isolation design of nuclear island mainly is used in when environment that earthquake considers has surpassed original type design limit value just to be considered.Greater than the original type design limit value of nuclear power, but original type design limit value was again more than or equal to the situation of factory site design basis earthquake SSE for the earthquake acceleration value of required consideration, and the locking threshold value is the most suitable to get factory site SSE value.But to the situation of original type design earthquake limit value less than factory site design basis earthquake SSE, the wealthy value of locking is to get primary standard design earthquake limit value for well.
Opening of above-mentioned blocking device can adopt the mode of cutting off of B level burnished bolt to realize, and be enough thick for realizing bolt generation shear failure, must make to connect orifice plate, makes its bearing strength greater than shear strength.Simultaneously for guaranteeing to open the precision of threshold values, leave the space and do not rub under the prerequisite taking to connect up and down orifice plate, select the suitable diameter of bolt for use and can process cutting in advance by theoretical surface of shear place at bolt, do the shear test checking through test room's sampling then.
Claims (3)
1. nuclear power plant's nuclear island architecture basics earthquake isolating equipment with blocking function, it is characterized in that: described base isolation device is installed between the concrete bearing and nuclear island raft foundation plate upper plate that is arranged on the lower shoe, described base isolation device comprises shock insulation pad and the blocking device that be arranged in parallel, and the shock insulation pad is the laminated rubber bearing of band lead for retractable pencil; Blocking device comprises up and down two support portions, up and down the joint of two support portions be respectively go up connect orifice plate (1) and under be connected orifice plate (2), both link together by screw rod (3), when blocking device was opened, employing was cut off the mode of screw rod and is opened.
2. a kind of nuclear power plant's nuclear island architecture basics earthquake isolating equipment with blocking function as claimed in claim 1, it is characterized in that: the quantity of screw rod (3) is 4.
3. a kind of nuclear power plant's nuclear island architecture basics earthquake isolating equipment with blocking function as claimed in claim 1 is characterized in that: described screw rod (3) adopts B level burnished bolt, and processes cutting in advance at the theoretical surface of shear place of bolt (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920167910 CN201546235U (en) | 2009-08-03 | 2009-08-03 | Nuclear power plant nuclear island structure base isolation device with locking function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920167910 CN201546235U (en) | 2009-08-03 | 2009-08-03 | Nuclear power plant nuclear island structure base isolation device with locking function |
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| CN201546235U true CN201546235U (en) | 2010-08-11 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989000A (en) * | 2015-06-24 | 2015-10-21 | 上海核工程研究设计院 | Pulled locking device for earthquake isolation rubber bearing |
| CN105464237A (en) * | 2015-12-16 | 2016-04-06 | 上海大学 | Nested type shear locking apparatus on rubber shock insulation support |
| CN105672736A (en) * | 2016-03-25 | 2016-06-15 | 上海核工程研究设计院 | Nuclear power plant integral seismic isolation device for |
| CN106415730A (en) * | 2013-12-31 | 2017-02-15 | 纽斯高动力有限责任公司 | Seismic attenuation system for nuclear reactor |
| CN115928886A (en) * | 2022-11-23 | 2023-04-07 | 上海核工程研究设计院股份有限公司 | Wedge-shaped sliding pressure relief type horizontal locking shock isolation device and method |
| TWI800654B (en) * | 2018-06-06 | 2023-05-01 | 日商迪思科股份有限公司 | Wafer processing method |
-
2009
- 2009-08-03 CN CN 200920167910 patent/CN201546235U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106415730A (en) * | 2013-12-31 | 2017-02-15 | 纽斯高动力有限责任公司 | Seismic attenuation system for nuclear reactor |
| CN106415730B (en) * | 2013-12-31 | 2018-04-20 | 纽斯高动力有限责任公司 | Seismic attenuation system for nuclear reactor |
| CN104989000A (en) * | 2015-06-24 | 2015-10-21 | 上海核工程研究设计院 | Pulled locking device for earthquake isolation rubber bearing |
| CN105464237A (en) * | 2015-12-16 | 2016-04-06 | 上海大学 | Nested type shear locking apparatus on rubber shock insulation support |
| CN105672736A (en) * | 2016-03-25 | 2016-06-15 | 上海核工程研究设计院 | Nuclear power plant integral seismic isolation device for |
| TWI800654B (en) * | 2018-06-06 | 2023-05-01 | 日商迪思科股份有限公司 | Wafer processing method |
| CN115928886A (en) * | 2022-11-23 | 2023-04-07 | 上海核工程研究设计院股份有限公司 | Wedge-shaped sliding pressure relief type horizontal locking shock isolation device and method |
| CN115928886B (en) * | 2022-11-23 | 2024-01-12 | 上海核工程研究设计院股份有限公司 | Wedge-shaped sliding pressure release type horizontal locking shock insulation device and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100811 Termination date: 20180803 |
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| CF01 | Termination of patent right due to non-payment of annual fee |