CN103047129A - Filter at safety system pump suction inlet inside replacement material water tank inside nuclear power plant - Google Patents
Filter at safety system pump suction inlet inside replacement material water tank inside nuclear power plant Download PDFInfo
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- CN103047129A CN103047129A CN201210549550XA CN201210549550A CN103047129A CN 103047129 A CN103047129 A CN 103047129A CN 201210549550X A CN201210549550X A CN 201210549550XA CN 201210549550 A CN201210549550 A CN 201210549550A CN 103047129 A CN103047129 A CN 103047129A
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- filter
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- pump suction
- system pump
- water tank
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Abstract
The invention discloses a filter at a safety system pump suction inlet inside a replacement material water tank inside a nuclear power plant, which comprises a plurality of filtering modules arranged along the annular area of the replacement material water tank inside a containment vessel; a base is arranged around the safety system pump suction inlet; the filtering modules are fixed on the base; each filtering module comprises a convergence box arranged above the pit of the safety system pump suction inlet; the convergence box is connected with a convergence channel along both sides of the annular area; a filtering component is arranged on the convergence channel and is in a platelike or columnar structure; and filtering holes for filtering screenings are formed on a plate or columnar surface. The pit filter is designed by adopting modular combination, so that on-site installation is simplified, and the problem of device deformation caused by welding is reduced; moreover, the mesh diameter or side length of the pit filter can be determined according to requirements, so that a large amount of screenings can be detained, and the influence on safety system devices at the down stream of the pit filter is prevented; and the structure has enough strength, and can bear load caused by piling of the screenings.
Description
Technical field
The present invention relates to the npp safety system, belong to an a kind of part for the built-in material-changing water tank filtration system of npp safety shell.
Background technique
After nuclear power station generation loss of-coolant accident (LOCA) (LOCA) or the main steam line rupture accident, can produce a large amount of disintegrating slags such as insulation, japanning, concrete particle and equipment metallic material, and along with the accident pipeline spurts flowing in the built-in material-changing water tank of containment (IRWST) of water and container spray water.Under accident conditions, containment spray system, safety injection system will come into operation, and utilize IRWST water to carry out reactor core and inject and container spray, in order to guarantee to spray water quality, are necessary to carry out the filtration of disintegrating slag in the IRWST.Safety system Pump Suction Nozzle filter namely plays the effect of impurity screening.
Nuclear plant safety systems pumps suction port filter is a kind of mechanical equipment of impurity screening, and it is installed in the IRWST, can filter the water with a large amount of disintegrating slags, and can bear that disintegrating slag gathers and the load that brings.Its working principle is, the filter downstream is equipped with the safety system pump, the operation of pump produces the effect of suction, cause the IRWST current to pass through filter, because stopping of filter, disintegrating slag is trapped in the filter upstream, thereby makes the water quality of the water that enters the filter downstream satisfy system's service condition, avoid excessive disintegrating slag to enter downstream line and reactor core, affecting the operation of equipment or being deposited in affects the residual heat of nuclear core derivation in the reactor core.
Summary of the invention
For existing deficiency in the prior art, the purpose of this invention is to provide a kind of characteristics of compact layout, firm in structure, easy for installation and can be immersed in for a long time in the boron water of built-in material-changing water tank and do not affect the safety system Pump Suction Nozzle filter (being sump filter) of its performance.
The present invention solves the problems of the technologies described above the technological scheme that adopts as described below:
Safety system Pump Suction Nozzle filter in the built-in material-changing water tank of a kind of nuclear power station, comprise the filtering module that several are arranged along the built-in material-changing water tank annulus of containment, four limits at the safety system Pump Suction Nozzle arrange pedestal, described filtering module is fixed on the pedestal, each filtering module comprises the header box that is arranged on safety system Pump Suction Nozzle melt pit top, header box connects a road that confluxes along the both sides of annulus, a road that confluxes is provided with filter assemblies, filter assemblies adopts en plaque or column structure, on plate or cylinder be provided with for the filtering hole of filtering disintegrating slag.
Further, a described road cross section that confluxes can be circular, oval, square, polygonal or rectangular.
Further, when described filter assemblies was the en plaque structure, the filter plate of filter assemblies adopted wavy perforated board, to increase filter area.
Further, the filter assemblies of described en plaque structure is the multilayer setting.
Further, described confluxing is bolted between a road, header box and the filter assemblies.
Further, described filter assemblies is arranged on the top in a road of confluxing, or the top in a road that confluxes and a upper lateral part, or the top in a road that confluxes and two upper lateral parts, or a road that confluxes is circumferential.
Further, described filtering module adopts the combined type mounting type of en plaque structure and column structure filter assemblies.
Further, described header box is connected by the pedestal of bolt with the safety system Pump Suction Nozzle, and described header box is rectangular or square casing, and the top of header box and side are frame structure, along the diagonal of framework buttress brace is set.
Further, a described road that confluxes, header box and filter assemblies adopt the manufacturing of Ultralow Carbon Stainless Steel metallic material.
Further, the filtering hole diameter of described filter assemblies or the length of side are less than 2.1mm.
Beneficial effect of the present invention is as follows: the Pump Suction Nozzle filter that the present invention adopts adopts the Ultralow Carbon Stainless Steel metallic material, and employing modular type Combination Design, the on-the-spot installation do not need any welding operation, several filtering modules can be combined but be bolted, simplify on-the-spot installation, reduced the problem of the equipment distortion that produces because of welding; And the mesh diameter of Pump Suction Nozzle filter or the length of side are less than the size of 2.1mm(or other requirements), can guarantee to be detained a large amount of disintegrating slags, avoid the impact on Pump Suction Nozzle filter downstream safety system equipment; Structure has enough intensity, can bear disintegrating slag and pile up and the load of generation.
Description of drawings
Fig. 1 is the structural representation of a filtering module of Pump Suction Nozzle filter of the present invention;
Fig. 2 to Fig. 6 is a road schematic diagram that confluxes of varying cross-section shape of the present invention;
Fig. 7 to Figure 10 is the multiple Placement schematic diagram in filter assemblies of the present invention and a road that confluxes;
Figure 11 is the mounting type schematic diagram in column structure filter assemblies and a road that confluxes;
Figure 12 is the structural representation of wavy perforated board;
Figure 13 is the header box frame structure schematic diagram that buttress brace is set.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is elaborated.
The interior safety system Pump Suction Nozzle of the built-in material-changing water tank of a kind of nuclear power station (IRWST) filter, as shown in Figure 1, comprise the filtering module 2 that several are arranged along the built-in material-changing water tank annulus 1 of containment, four limits at the safety system Pump Suction Nozzle arrange pedestal, filtering module is fixed on the pedestal, described each filtering module 2 comprises the header box 3 that is arranged on safety system Pump Suction Nozzle melt pit top, header box 3 connects the road 4 that confluxes along the both sides of annulus, the road 4 that confluxes is provided with filter assemblies 5, filter assemblies 5 adopts en plaque or column structures, on plate or cylinder be provided with for the filtering hole of filtering disintegrating slag.
Wherein, header box refers to a kind of box or box type container that compiles and hold current, all around or the top can be the entity dividing plate, can be the steel plate of installation frame effect also, the below is not sealed, thereby allows by the suction of pump current to be flowed out from the below; A road that confluxes refers to that a kind of in axial direction both ends of the surface do not seal, and by flange connect and before and after the canal formula or the groove-type device that allow to compile flow that link to each other, its cross section can be circle, rectangular, square or the shape such as oval.Except position and flange connections that filter assemblies is installed, be the entity sealing around the road that confluxes, play support frame and compile current.
In one embodiment, in order to adapt to IRWST inner space arrangement constraints, 4 safety system Pump Suction Nozzle melt pits can be set in containment IRWST annulus, for each melt pit, independently filter module assembly be set, satisfy the requirement of filtering.
Excessive and be subject to the restriction of arrangement space and floor space for fear of filter area, also can share some filtering module assembly by annotate spray system with a series of peace, to satisfy the requirement of filter area.
Each filter assemblies integral body of the present invention is submerged under water the height dimension of the height of 10mm at least or other requirements.
According to arranging coverage area, filter assemblies is provided with some manholes of keeping in repair and checking be convenient to.
The occupation of land space of whole filter assemblies will consider that personnel are along the space requirement of annulus walking.
The header box 3 that is positioned at safety system Pump Suction Nozzle melt pit top is square body or rectangular structure, is convenient to carry out and being fixedly connected with of ground or metope.To guarantee sealing with being fixedly connected with of ground and metope, avoid large disintegrating slag and particle to enter the safety system Pump Suction Nozzle.Header box 3 connects the road 4 that confluxes along the annulus both sides; Filter assemblies (mainly being at the wall in a road that confluxes filter assemblies to be installed) all can be installed towards annulus wall one side in header box and a road that confluxes.The combinating face of header box is the entity steel plate substantially, adds in case of necessity exhaust port or exhaust manifolds.
Conflux a road 4 for from the outward extending fluid collection parts of melt pit header box.A road 4 cross sections that conflux can (be seen Fig. 2-Fig. 6) for suitable shapes such as circular, oval, square, polygonal or rectangulars.The basic combinating face in a road 4 of confluxing is the entity steel plate.The position of filter assemblies 5 is installed for needs carries out necessary perforate design.Conflux a road 4 except with zone that ground is connected, all filter assemblies 5 can be installed suitably.
The Placement in filter assemblies 5 and a road that confluxes can (be seen Fig. 7-Figure 10) for upper dress formula, upper side-mounted, three side-mounted, surrounding type various ways; Fig. 7 is upper dress formula, and filter assemblies 5 is arranged on the top in the road 4 that confluxes; Fig. 8 is upper side-mounted, and filter assemblies 5 is arranged on top and a upper lateral part in the road 4 that confluxes; Fig. 9 is three side-mounted, and filter assemblies 5 is arranged on top and two upper lateral parts in the road 4 that confluxes; Figure 10 is surrounding type, and filter assemblies 5 is arranged on the circumferential of the road 4 that confluxes.
Filter assemblies is the filter element that is installed on the road that confluxes, and it can adopt en plaque or column structure, and the filter assemblies of en plaque structure is the multilayer setting, will punch on the plate and on the cylinder for filtering disintegrating slag:
The en plaque structure: the mounting type of en plaque filter assemblies and busway is seen Fig. 7-Figure 10; these different Placements are applicable to different processing requests, arrangement requirement, filtration requirement; the filter assemblies mounting type of special both sides dress, three sides dress or this class of surrounding type; can guarantee that current enter a road that confluxes from the lower position of filter assemblies, guarantee the water yield of confluxing.
Column structure: the column structure filter assemblies is seen Figure 11 with the mounting type in a road that confluxes.
The en plaque filter plate can adopt wavy perforated board, sees Figure 12, in order to increasing filter area, and holds more disintegrating slag.
Conflux joint connection in site form with bolts between each component of a road, header box and filter assemblies is avoided producing thermal distortion because be welded to connect, and affects stability and the robustness of structure.
Whole filter can also according to as installed demand and condition restriction, adopt the combined type mounting design of sheet structure and column structure filter assemblies.
Be positioned at safety system Pump Suction Nozzle four limit mounting bases, the header box of pedestal and top is with bolts, and header box is rectangular or square casing, and except the bottom, other faces can adopt frame structure, and in diagonal buttress brace are set, and see Figure 13.
Pump Suction Nozzle (melt pit) filter that the present invention adopts adopts the Ultralow Carbon Stainless Steel metallic material, and employing modular type Combination Design, the on-the-spot installation do not need any welding operation, several filtering modules can be combined but be bolted, simplify on-the-spot installation, reduced the problem of the equipment distortion that produces because of welding; And the mesh diameter of Pump Suction Nozzle (melt pit) filter or the length of side are less than the size of 2.1mm(or other requirements), can guarantee to be detained a large amount of disintegrating slags, avoid the impact on Pump Suction Nozzle (melt pit) filter downstream safety system equipment; Structure has enough intensity, can bear disintegrating slag and pile up and the load of generation.
It should be noted that; above-mentioned specific embodiment only is exemplary; under above-mentioned instruction of the present invention, those skilled in the art can carry out various improvement and distortion on the basis of above-described embodiment, and these improvement or distortion all drop in protection scope of the present invention.It will be understood by those skilled in the art that top specific descriptions just in order to explain purpose of the present invention, is not for restriction the present invention.Protection scope of the present invention is limited by claim and equivalent thereof.
Claims (10)
1. safety system Pump Suction Nozzle filter in the built-in material-changing water tank of nuclear power station, it is characterized in that: comprise the filtering module (2) that several are arranged along the built-in material-changing water tank annulus of containment (1), four limits at the safety system Pump Suction Nozzle arrange pedestal, described filtering module (2) is fixed on the pedestal, each filtering module comprises the header box (3) that is arranged on safety system Pump Suction Nozzle melt pit top, header box (3) connects the road (4) that confluxes along the both sides of annulus, the road (4) that confluxes is provided with filter assemblies (5), filter assemblies (5) adopts en plaque or column structure, on plate or cylinder be provided with for the filtering hole of filtering disintegrating slag.
2. safety system Pump Suction Nozzle filter in the built-in material-changing water tank of nuclear power station as claimed in claim 1 is characterized in that: a described road (4) cross section that confluxes can be circular, oval, square, polygonal or rectangular.
3. safety system Pump Suction Nozzle filter in the built-in material-changing water tank of nuclear power station as claimed in claim 1 is characterized in that: when described filter assemblies (5) during for the en plaque structure, the filter plate of filter assemblies adopts wavy perforated board, to increase filter area.
4. such as safety system Pump Suction Nozzle filter in claim 1 or the built-in material-changing water tank of 2 or 3 described nuclear power station, it is characterized in that: the filter assemblies of described en plaque structure is the multilayer setting.
5. safety system Pump Suction Nozzle filter in the built-in material-changing water tank of nuclear power station as claimed in claim 1 is characterized in that: be bolted between the described road (4) that confluxes, header box (3) and the filter assemblies (5).
6. such as safety system Pump Suction Nozzle filter in claim 2 or the built-in material-changing water tank of 5 described nuclear power station, it is characterized in that: described filter assemblies (5) is arranged on the top of a road (4) of confluxing, or top and a upper lateral part in the road (4) that confluxes, or top and two upper lateral parts in the road (4) that confluxes, or the road (4) that confluxes is circumferential.
7. safety system Pump Suction Nozzle filter in the built-in material-changing water tank of nuclear power station as claimed in claim 1 is characterized in that: the combined type mounting type of described filtering module employing en plaque structure and column structure filter assemblies.
8. safety system Pump Suction Nozzle filter in the built-in material-changing water tank of nuclear power station as claimed in claim 1, it is characterized in that: described header box (3) is connected by the pedestal of bolt with the safety system Pump Suction Nozzle, described header box is rectangular or square casing, the top of header box and side are frame structure, along the diagonal of framework buttress brace are set.
9. safety system Pump Suction Nozzle filter in the built-in material-changing water tank of nuclear power station as claimed in claim 1 is characterized in that: the described road (4) that confluxes, header box (3) and the manufacturing of filter assemblies (5) employing Ultralow Carbon Stainless Steel metallic material.
10. safety system Pump Suction Nozzle filter in the built-in material-changing water tank of nuclear power station as claimed in claim 1, it is characterized in that: the filtering hole diameter of described filter assemblies (5) or the length of side are less than 2.1mm.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210549550XA CN103047129A (en) | 2012-12-17 | 2012-12-17 | Filter at safety system pump suction inlet inside replacement material water tank inside nuclear power plant |
| PCT/CN2013/089204 WO2014094567A1 (en) | 2012-12-17 | 2013-12-12 | In-containment refueling water storage tank filter system |
| MYPI2015701933A MY188132A (en) | 2012-12-17 | 2013-12-12 | In-containment refueling water storage tank filter system |
| GB1509986.4A GB2522822B (en) | 2012-12-17 | 2013-12-12 | In-containment refueling water storage tank filter system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210549550XA CN103047129A (en) | 2012-12-17 | 2012-12-17 | Filter at safety system pump suction inlet inside replacement material water tank inside nuclear power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103047129A true CN103047129A (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210549550XA Pending CN103047129A (en) | 2012-12-17 | 2012-12-17 | Filter at safety system pump suction inlet inside replacement material water tank inside nuclear power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103047129A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014094567A1 (en) * | 2012-12-17 | 2014-06-26 | 中国核电工程有限公司 | In-containment refueling water storage tank filter system |
| CN104078085A (en) * | 2014-06-04 | 2014-10-01 | 中国核电工程有限公司 | Containment built-in refueling water tank with washing function |
| WO2017012265A1 (en) * | 2015-07-20 | 2017-01-26 | 中广核研究院有限公司 | Containment recycling filter |
| CN110902810A (en) * | 2019-12-06 | 2020-03-24 | 江苏裕隆环保有限公司 | Block net structure in MBBR filler pond |
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| US5696801A (en) * | 1995-08-24 | 1997-12-09 | Performance Contracting, Inc. | Suction strainer with a internal core tube |
| CN101102827A (en) * | 2004-11-15 | 2008-01-09 | 加拿大原子能有限公司 | Colander with rib |
| US20080223779A1 (en) * | 2004-05-14 | 2008-09-18 | Continuum Dynamics, Inc. | Low Head Loss Modular Suction Strainer with Contoured Surfaces |
| CN201505480U (en) * | 2009-05-25 | 2010-06-16 | 中国广东核电集团有限公司 | Containment sump strainer assembly |
| CN201556427U (en) * | 2009-11-23 | 2010-08-18 | 中广核工程有限公司 | Nuclear power station safety shell pit and filter screen thereof |
| CN101947397A (en) * | 2010-07-22 | 2011-01-19 | 中科华核电技术研究院有限公司 | Containment sump filter of horizontal pressurized water reactor (PWR) nuclear power plant |
| TW201114472A (en) * | 2009-06-23 | 2011-05-01 | Ca Atomic Energy Ltd | Vaned filtering element |
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2012
- 2012-12-17 CN CN201210549550XA patent/CN103047129A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5696801A (en) * | 1995-08-24 | 1997-12-09 | Performance Contracting, Inc. | Suction strainer with a internal core tube |
| US20080223779A1 (en) * | 2004-05-14 | 2008-09-18 | Continuum Dynamics, Inc. | Low Head Loss Modular Suction Strainer with Contoured Surfaces |
| CN101102827A (en) * | 2004-11-15 | 2008-01-09 | 加拿大原子能有限公司 | Colander with rib |
| CN201505480U (en) * | 2009-05-25 | 2010-06-16 | 中国广东核电集团有限公司 | Containment sump strainer assembly |
| TW201114472A (en) * | 2009-06-23 | 2011-05-01 | Ca Atomic Energy Ltd | Vaned filtering element |
| CN201556427U (en) * | 2009-11-23 | 2010-08-18 | 中广核工程有限公司 | Nuclear power station safety shell pit and filter screen thereof |
| CN101947397A (en) * | 2010-07-22 | 2011-01-19 | 中科华核电技术研究院有限公司 | Containment sump filter of horizontal pressurized water reactor (PWR) nuclear power plant |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014094567A1 (en) * | 2012-12-17 | 2014-06-26 | 中国核电工程有限公司 | In-containment refueling water storage tank filter system |
| GB2522822A (en) * | 2012-12-17 | 2015-08-05 | China Nuclear Power Eng Co Ltd | In-containment refueling water storage tank filter system |
| GB2522822B (en) * | 2012-12-17 | 2020-09-02 | China Nuclear Power Eng Co Ltd | In-containment refueling water storage tank filter system |
| CN104078085A (en) * | 2014-06-04 | 2014-10-01 | 中国核电工程有限公司 | Containment built-in refueling water tank with washing function |
| WO2017012265A1 (en) * | 2015-07-20 | 2017-01-26 | 中广核研究院有限公司 | Containment recycling filter |
| GB2555971A (en) * | 2015-07-20 | 2018-05-16 | China Nuclear Power Technology Res Inst Co Ltd | Containment recycling filter |
| GB2555971B (en) * | 2015-07-20 | 2022-01-12 | China Nuclear Power Technology Res Inst Co Ltd | Containment recycling filter |
| CN110902810A (en) * | 2019-12-06 | 2020-03-24 | 江苏裕隆环保有限公司 | Block net structure in MBBR filler pond |
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Application publication date: 20130417 |