CN103028285B - Filter system for built-in containment refueling water storage tank - Google Patents
Filter system for built-in containment refueling water storage tank Download PDFInfo
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- CN103028285B CN103028285B CN201210548088.1A CN201210548088A CN103028285B CN 103028285 B CN103028285 B CN 103028285B CN 201210548088 A CN201210548088 A CN 201210548088A CN 103028285 B CN103028285 B CN 103028285B
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- disintegrating slag
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Abstract
The invention discloses a filter system for a built-in containment refueling water storage tank, which comprises disintegrating slag trash rack arranged above a hole of an upper floor of the built-in containment refueling water storage tank, a disintegrating slag detention basket is arranged in the built-in containment refueling water storage tank below the hole of the upper floor, an opening at the upper part of the disintegrating slag detention basket is higher than the highest liquid level of liquid in the built-in containment refueling water storage tank and aims at the hole of the upper floor on the in-containment refueling water storage tank, the disintegrating slag detention basket and a pumping inlet filter are independently arranged or are connected with each other through a fixing device in the built-in containment refueling water storage tank, and the disintegrating slag trash rack, the disintegrating detention basket and the pumping inlet filter form a three-level filter system. The system occupies a relatively small area, is more flexible in arrangement and high in filter efficiency, does not need a large-area space, and is also suitable for an underwater environment such as the built-in containment refueling water storage tank.
Description
Technical field
The present invention relates to npp safety system, be specifically related to the built-in material-changing water tank filter system of a kind of containment.
Background technology
When there is the accident such as LOCA or Main steam line break in npp safety shell, high energy line fracture in containment, the power of spurting of cut medium is by the insulation material to surrounding, the japanning of civil engineering structure and equipment and other materials etc. form impact failure, thus cause the generation of a large amount of all kinds of disintegrating slag, if disintegrating slag is passed to Safety Injection spray, pond (the melt pit in such as two generations pressurization water-water reactor unit at safety shower system entry place, built-in material-changing water tank IRWST in three generations's presurized water reactor unit) and deposit on the filter that arranges therein, disintegrating slag on filter screen accumulates the increase that disintegrating slag lamination will be caused to fall, and then likely cause safety injection system or containment spray system and pump to produce underfed, the problems such as cavitation, affect npp safety.
Under accident conditions, containment spray system, safety injection system will come into operation, utilizing I RWST water (or melt pit collect water) to carry out reactor core injection and container spray, in order to ensure to spray water quality, to be necessary to carry out in IRWST the filtration of (or melt pit collect water) disintegrating slag.Namely security system Pump Suction Nozzle filter plays the effect of impurity screening.The filter at safety injection system and containment spray system Pump Suction Nozzle place in containment is the visual plant of npp safety system.Nuclear plant safety systems pumps suction inlet filter is a kind of mechanical equipment of impurity screening, and it is installed on Pump Suction Nozzle place, can filter the water with a large amount of disintegrating slag, and can bear disintegrating slag and gather and the load brought.Its operation principle is, filter downstream is provided with security system pump, the operation of pump produces the effect of water suction, IRWST water (or ground effluent) is caused to pass through filter, due to the stop of filter, disintegrating slag is trapped in filter upstream, thus makes the water quality of the water entering filter downstream meet system cloud gray model requirement, avoid excessive disintegrating slag to enter downstream line and reactor core, affect equipment operation or be deposited in in-core affect residual heat of nuclear core derive.
Conventional filter is directly installed on safety injection system or containment spray system Pump Suction Nozzle, and adopt strainer filtering disintegrating slag, see Fig. 1, in figure, 1 is conventional filter, and 2 is safety injection system or containment spray system pump, and 3 is reactor core.
In order to prevent the problem such as underfed, cavitation, conventional filter needs to have larger filter area, ensures that the overall pressure drop of filter is in limit value.Therefore the layout of conventional filter needs to occupy suitable large space, for two generation PWR nuclear power plant, sump filter is arranged and is occupied the ring corridor area of half.Simultaneously because circulation area is excessive, the particulate and the fiber that also result through filter screen are more, and the heat that may affect reactor core is derived.
Summary of the invention
For deficiency existing in prior art, the object of this invention is to provide a kind of floor space little, arrange more flexible, and the built-in material-changing water tank filter system of containment that filter efficiency is high.
The technical solution adopted in the present invention is as follows: the built-in material-changing water tank filter system of a kind of containment, comprise the disintegrating slag trash rack above the hole being arranged on built-in material-changing water tank upper strata floor, disintegrating slag is set in the built-in material-changing water tank below the hole of described upper strata floor and is detained basket, disintegrating slag is detained the most high liquid level (HLL) of basket upper opening height higher than liquid in built-in material-changing water tank, and opening aims at the upper floor plate holes of built-in material-changing water tank.In built-in material-changing water tank, disintegrating slag is detained basket and Pump Suction Nozzle filter is independently arranged, if by space limit value, disintegrating slag can be detained basket and adopt fixture to be connected with Pump Suction Nozzle filter; Disintegrating slag trash rack, disintegrating slag are detained basket, Pump Suction Nozzle filter forms three-level filter system.
Further, described disintegrating slag trash rack entirety is wave curved-surface structure; The bottom of disintegrating slag trash rack arranges reinforcement.
Further, described disintegrating slag is detained the aperture area that basket has all current and the disintegrating slag that can accept from upstream; Around the opening part of described disintegrating slag delay basket, disintegrating slag collecting board is set; The surface that described disintegrating slag is detained basket is stainless steel porous filter screen.
Further, described Pump Suction Nozzle filter comprises several filtering modules arranged along the built-in material-changing water tank annulus of containment, on four limits of security system Pump Suction Nozzle, pedestal is set, described filtering module is fixed on pedestal, each filtering module comprises the header box be arranged on above security system Pump Suction Nozzle melt pit, the header box annularly both sides in district connects and to conflux a road, a road that confluxes is provided with filter assemblies, filter assemblies adopts en plaque or column structure, is provided with the filter bores for filtering disintegrating slag on plate or on cylinder.
Further, when described filter assemblies is en plaque structure, the filter of filter assemblies adopts wavy perforated board, to increase filter area; The filter bores diameter of filter assemblies or the length of side are less than the aperture of 2.1mm(or requirement).
Beneficial effect of the present invention is as follows: the present invention adopts three-stage filtration, and disintegrating slag trash rack can tackle large disintegrating slag, prevents external shock, improves the ability of filter reply accident, improves the security of system; Disintegrating slag is detained basket and adopts the screen surface similar or identical with Pump Suction Nozzle filter, can tackle and store most of disintegrating slag, thus greatly reduce arrival afterbody filter disintegrating slag amount, and the water quality in IRWST can be ensured, because the disintegrating slag amount arriving Pump Suction Nozzle filter greatly reduces, thus can still keep lower pressure drop while the filter area reducing afterbody filter, and reduced by the molecule of filter and the total amount of fiber, reduce the possibility that blocking occurs in downstream, improve nuclear reactor safety; And tertiary filter, floor space is less, arranges more flexible, does not need large area space, be applicable to this underwater environment of built-in material-changing water tank simultaneously.
Accompanying drawing explanation
Fig. 1 is the mounting structure schematic diagram of sump filter in prior art;
Fig. 2 is containment of the present invention built-in material-changing water tank filter system structural representation;
Fig. 3 is disintegrating slag trash rack structural representation of the present invention;
Fig. 4 is that disintegrating slag of the present invention is detained basket structural representation;
Fig. 5 is a filtering module structural representation of Pump Suction Nozzle filter of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is elaborated.
The present invention changes three-stage filtration into by traditional filter single-stage being filtered, tertiary filter is provided with at built-in material-changing water tank (IRWST) place, disintegrating slag is tackled under accident conditions, fine filtering is carried out to the water that IRWST collects, the blocking of the nozzle on CSP system spraying ring pipe can not be caused with the water guaranteeing to enter containment spray system (CSP) and safety injection system (RSI) and in the RSI system recirculates stage, the blocking of barrier be supported to fuel rod.
As shown in Figure 2, the built-in material-changing water tank filter system of containment provided by the invention, comprise the disintegrating slag trash rack 4 above the hole 7 being arranged on built-in material-changing water tank upper strata floor, disintegrating slag is set in the built-in material-changing water tank below the hole 7 of described upper strata floor and is detained basket 5, disintegrating slag is detained the most high liquid level (HLL) of basket 5 upper opening height higher than liquid in built-in material-changing water tank, and opening aims at the upper floor plate holes 7 of built-in material-changing water tank; In built-in material-changing water tank, disintegrating slag is detained basket 5 and arranges with Pump Suction Nozzle filter 6 is independent, or disintegrating slag is detained basket 5 and adopts fixture to be connected with Pump Suction Nozzle filter 6; Disintegrating slag trash rack 4, disintegrating slag are detained basket 5, Pump Suction Nozzle filter 6 forms three-level filter system.
In order to increase the footprint of disintegrating slag trash rack 4, disintegrating slag trash rack is designed to wave curved-surface structure by the present invention, as shown in Figure 3.In order to increase the structural strength of disintegrating slag trash rack, in the bottom design of disintegrating slag trash rack 4, increasing reinforcement, can prevent trash rack from dropping in built-in material-changing water tank simultaneously.The patent " the large disintegrating slag trash rack of built-in material-changing water tank " that the concrete introduction of disintegrating slag trash rack can be applied for reference to applicant the same period.
Disintegrating slag is detained basket 5 and is fixedly installed in built-in material-changing water tank, and disintegrating slag is detained the most high liquid level (HLL) of height higher than liquid in built-in material-changing water tank of basket 5, and the opening that disintegrating slag is detained basket 5 aims at the upper floor plate holes 3 of built-in material-changing water tank, as shown in Figure 2.The upper strata floor of built-in material-changing water tank has some holes 7, arranges be detained basket 5 in the below of hole 7.Disintegrating slag is detained the structure of basket 5 as shown in Figure 4, and disintegrating slag is detained the aperture area that basket 5 should have all current and the disintegrating slag that can accept from upstream; Omit for preventing disintegrating slag and be detained outside basket at disintegrating slag, disintegrating slag collecting board can be set around the opening part that disintegrating slag is detained basket 5 if desired; Disintegrating slag is detained the reinforcement that basket 5 has also comprised load-bearing effect, ensures that disintegrating slag is detained basket 1 and has the impact that enough intensity bears current while storage disintegrating slag.Disintegrating slag is detained patent that the concrete introduction of basket can apply for reference to applicant the same period " a kind of for tackling and storing the device of disintegrating slag ".
Pump Suction Nozzle filter comprises several filtering modules arranged along the built-in material-changing water tank annulus of containment, and arrange pedestal on four limits of security system Pump Suction Nozzle, filtering module is fixed on pedestal.Pump Suction Nozzle filter is set using modularized design, and each filter assemblies is formed by connecting by tens of groups of filtering modules.The net positive suction head requirement that filter pressure drop that disintegrating slag amount causes need guarantee suction inlet down-stream system pump is analyzed according to upstream.Filter will be submerged in built-in material-changing water tank water for a long time, and filter assemblies can flexible arrangement.
As shown in Figure 5, described each filtering module 9 comprises the header box 11 be arranged on above security system Pump Suction Nozzle melt pit, the header box 11 annularly both sides in district 10 connects and to conflux a road 12, the road 12 that confluxes is provided with filter assemblies 13, filter assemblies 13 adopts en plaque or column structure, is provided with the filter bores for filtering disintegrating slag on plate or on cylinder.
In order to avoid filter area is excessive and be subject to the restriction of arrangement space and floor space, by sharing some filtering module assembly, to meet the requirement of filter area with a series of peace note spray system.
The header box 11 be positioned at above security system Pump Suction Nozzle melt pit 8 is square or rectangular structure, is convenient to carry out and being fixedly connected with of ground or metope.To ensure to seal with being fixedly connected with of metope with ground, avoid large disintegrating slag and particle to enter security system Pump Suction Nozzle.Header box 11 annularly both sides, district connects the road 12 that confluxes.The combinatorial surface of header box is entity steel plate substantially, adds steam vent or exhaust manifolds if desired.
Conflux a road 12 for from the outward extending fluid collection parts of melt pit header box.A road 12 cross section that confluxes can be the suitable shapes such as circular, ellipse, square, polygon or rectangle.The basic combinatorial surface in a road 12 of confluxing is entity steel plate.Necessary perforate design is carried out for needing the position of installing filter assemblies 13.Conflux a road 12 except the region be connected with ground, all filter assemblies 13 can be suitably installed.The connected mode in filter assemblies 13 and the road 12 that confluxes can be the multiple similar type such as upper dress formula, upper side-mounted, three side-mounted, circulating type.
To conflux a road 12, connection form with bolts between header box 11 and each parts of filter assemblies 13, avoiding producing thermal deformation because of being welded to connect, affecting stability and the robustness of structure.
The patent " filter at safety system pump suction inlet inside replacement material water tank inside nuclear power plant " that the concrete introduction of Pump Suction Nozzle filter can be applied for reference to applicant the same period.
It should be noted that; above-mentioned specific embodiment is only 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 improve or distortion all drops in protection scope of the present invention.It will be understood by those skilled in the art that specific descriptions are above to explain object of the present invention, not for limiting the present invention.Protection scope of the present invention is by claim and equivalents thereof.
Claims (9)
1. the built-in material-changing water tank filter system of containment, it is characterized in that: the disintegrating slag trash rack (4) comprising hole (7) top being arranged on built-in material-changing water tank upper strata floor, disintegrating slag is set in the built-in material-changing water tank of hole (7) below of described upper strata floor and is detained basket (5), disintegrating slag is detained the most high liquid level (HLL) of basket (5) upper opening height higher than liquid in built-in material-changing water tank, and opening aims at the upper floor plate holes (7) of built-in material-changing water tank; In built-in material-changing water tank, disintegrating slag is detained basket (5) and arranges with Pump Suction Nozzle filter (6) is independent, or disintegrating slag is detained basket (5) and adopts fixture to be connected with Pump Suction Nozzle filter (6); Disintegrating slag trash rack (4), disintegrating slag are detained basket (5), Pump Suction Nozzle filter (6) forms three-level filter system.
2. the built-in material-changing water tank filter system of containment as claimed in claim 1, is characterized in that: described disintegrating slag trash rack (4) entirety is wave curved-surface structure.
3. the built-in material-changing water tank filter system of containment as claimed in claim 2, is characterized in that: the bottom of described disintegrating slag trash rack (4) arranges reinforcement.
4. the built-in material-changing water tank filter system of containment as claimed in claim 1, is characterized in that: described disintegrating slag is detained the aperture area that basket (5) has all current and the disintegrating slag that can accept from upstream.
5. the built-in material-changing water tank filter system of containment as claimed in claim 4, is characterized in that: arrange disintegrating slag collecting board around the opening part of described disintegrating slag delay basket (5).
6. the built-in material-changing water tank filter system of the containment as described in claim 4 or 5, is characterized in that: the surface that described disintegrating slag is detained basket (5) is stainless steel porous filter screen.
7. the built-in material-changing water tank filter system of containment as claimed in claim 1, it is characterized in that: described Pump Suction Nozzle filter (6) comprises several filtering modules (9) arranged along the built-in material-changing water tank annulus (10) of containment, on four limits of security system Pump Suction Nozzle, pedestal is set, described filtering module is fixed on pedestal, each filtering module comprises the header box (11) being arranged on security system Pump Suction Nozzle melt pit (8) top, header box (11) the annularly both sides in district connects and to conflux a road (12), the road (12) that confluxes is provided with filter assemblies (13), filter assemblies (13) adopts en plaque or column structure, the filter bores for filtering disintegrating slag is provided with on plate or on cylinder.
8. the built-in material-changing water tank filter system of containment as claimed in claim 7, is characterized in that: when described filter assemblies (13) is for en plaque structure, the filter of filter assemblies (13) adopts wavy perforated board, to increase filter area.
9. the built-in material-changing water tank filter system of containment as claimed in claim 7 or 8, is characterized in that: filter bores diameter or the length of side of filter assemblies (13) are less than 2.1mm.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210548088.1A CN103028285B (en) | 2012-12-17 | 2012-12-17 | Filter system for built-in containment refueling water storage tank |
| MYPI2015701933A MY188132A (en) | 2012-12-17 | 2013-12-12 | In-containment refueling water storage tank filter system |
| PCT/CN2013/089204 WO2014094567A1 (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 |
| ARP130104767A AR094037A1 (en) | 2012-12-17 | 2013-12-16 | RECHARGE WATER STORAGE TANK FILTER SYSTEM WITHIN THE CONTAINER |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210548088.1A CN103028285B (en) | 2012-12-17 | 2012-12-17 | Filter system for built-in containment refueling water storage tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103028285A CN103028285A (en) | 2013-04-10 |
| CN103028285B true CN103028285B (en) | 2015-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210548088.1A Active CN103028285B (en) | 2012-12-17 | 2012-12-17 | Filter system for built-in containment refueling water storage tank |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103028285B (en) |
| AR (1) | AR094037A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2522822B (en) * | 2012-12-17 | 2020-09-02 | China Nuclear Power Eng Co Ltd | In-containment refueling water storage tank filter system |
| CN104078085B (en) * | 2014-06-04 | 2016-10-05 | 中国核电工程有限公司 | A kind of built-in material-changing water tank of containment with water scrub function |
| FR3038445B1 (en) | 2015-07-03 | 2017-08-18 | Areva | NUCLEAR REACTOR WITH FILTERING DEVICE IN THE IRWST RESERVOIR |
| CN105148598B (en) * | 2015-07-20 | 2017-01-11 | 中广核研究院有限公司 | Connecting module for containment recycling filter |
| CN104971542B (en) * | 2015-07-20 | 2017-01-25 | 中广核研究院有限公司 | Containment recycling filter |
| WO2018068767A1 (en) * | 2016-10-14 | 2018-04-19 | 中广核工程有限公司 | Internally installed refuelling water storage tank for nuclear-power-plant containment |
| CN108159756B (en) * | 2017-12-27 | 2021-06-08 | 中广核研究院有限公司 | Detention basket and filter disc thereof |
| CN109224603A (en) * | 2018-10-15 | 2019-01-18 | 中国核电工程有限公司 | A kind of basket filter device of multiple layer combination for being detained impurity |
| CN110327683B (en) * | 2019-06-21 | 2021-10-26 | 中广核工程有限公司 | Nuclear power station pool filter screen and dismounting method thereof |
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2012
- 2012-12-17 CN CN201210548088.1A patent/CN103028285B/en active Active
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2013
- 2013-12-16 AR ARP130104767A patent/AR094037A1/en active IP Right Grant
Patent Citations (7)
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| JPH05187143A (en) * | 1992-01-14 | 1993-07-27 | Akitoshi Sugimoto | Side face blowoff unit |
| CN2411834Y (en) * | 1999-10-13 | 2000-12-27 | ***后勤部净水研究所 | Gravity natural filtering water purifying appts. |
| CN2528995Y (en) * | 2001-12-08 | 2003-01-01 | 郭竞生 | Fluid filter unit |
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Also Published As
| Publication number | Publication date |
|---|---|
| AR094037A1 (en) | 2015-07-08 |
| CN103028285A (en) | 2013-04-10 |
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