WO2014094567A1 - 安全壳内置换料水箱过滤器系统 - Google Patents
安全壳内置换料水箱过滤器系统 Download PDFInfo
- Publication number
- WO2014094567A1 WO2014094567A1 PCT/CN2013/089204 CN2013089204W WO2014094567A1 WO 2014094567 A1 WO2014094567 A1 WO 2014094567A1 CN 2013089204 W CN2013089204 W CN 2013089204W WO 2014094567 A1 WO2014094567 A1 WO 2014094567A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- filter
- water tank
- containment
- debris
- replacement water
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 238000001914 filtration Methods 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 230000014759 maintenance of location Effects 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 239000002828 fuel tank Substances 0.000 claims 1
- 230000004888 barrier function Effects 0.000 abstract 2
- 239000002893 slag Substances 0.000 description 60
- 238000006073 displacement reaction Methods 0.000 description 20
- 239000010813 municipal solid waste Substances 0.000 description 10
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- 239000007921 spray Substances 0.000 description 9
- 239000002131 composite material Substances 0.000 description 8
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
- B01D35/027—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks rigidly mounted in or on tanks or reservoirs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/02—Combinations of filters of different kinds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/20—Filtering
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/28—Arrangements for introducing fluent material into the reactor core; Arrangements for removing fluent material from the reactor core
- G21C19/30—Arrangements for introducing fluent material into the reactor core; Arrangements for removing fluent material from the reactor core with continuous purification of circulating fluent material, e.g. by extraction of fission products deterioration or corrosion products, impurities, e.g. by cold traps
- G21C19/307—Arrangements for introducing fluent material into the reactor core; Arrangements for removing fluent material from the reactor core with continuous purification of circulating fluent material, e.g. by extraction of fission products deterioration or corrosion products, impurities, e.g. by cold traps specially adapted for liquids
-
- 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
Definitions
- the invention relates to a nuclear power plant safety system, and in particular to a safety tank internal displacement tank filter system. Background technique
- the safety system pump suction filter acts to filter impurities.
- the filter in the containment system of the containment and the suction port of the containment spray system is an important equipment for the safety system of the nuclear power plant.
- Nuclear Power Plant Safety System The pump suction filter is a mechanical device that filters impurities. It is installed at the pump suction port and is capable of filtering water with a large amount of debris and can withstand the load caused by the accumulation of debris.
- a safety system pump is installed downstream of the filter, and the operation of the pump generates water absorption, which causes the IRWST water (or pit water) to pass through the filter. Due to the blocking of the filter, the slag stays upstream of the filter. Therefore, the water quality of the water entering the downstream of the filter meets the requirements of the system operation, avoiding excessive slag entering the downstream pipeline and the core, affecting the operation of the equipment or accumulating in the core to affect the heat removal of the core.
- the traditional filter is directly installed in the suction port of the safety injection system or the safety chamber spray system pump.
- the filter screen is used to filter the slag. See Figure 1 for the traditional filter and 2 for the safety injection system or the safety case spray system pump. , 3 is the reactor core.
- a containment water tank filter system in a containment body comprising a slag trash rack disposed above a hole of an upper floor of the inner displacement water tank, below the hole of the upper floor slab
- a slag retention basket is arranged in the replacement tank, and the upper opening height of the slag retention basket is higher than the highest liquid level of the liquid in the inner displacement tank, and the opening is aligned with the upper floor hole of the inner displacement tank.
- the slag retention basket is independently set with the pump suction filter.
- the slag retention basket and the pump suction filter can be connected by a fixing device; the slag trash rack, broken
- the slag retention basket and the pump suction filter form a three-stage filtration system.
- the slag trap grille is a wave-shaped curved structure as a whole; the bottom of the slag trash rack is provided with a strong rib.
- the slag retention basket has an open area capable of accepting all the water flow and slag from the upstream, and is capable of accommodating the slag; a slag collection slab is disposed around the opening of the slag retention basket;
- the surface of the stagnant basket is a stainless steel porous sieve.
- the pump suction port filter comprises a plurality of filter modules arranged along the effective area of the displacement tank in the containment, and a base is arranged on four sides of the suction port of the safety system pump, and the filter module is fixed on the base, each The filter module comprises a combiner box disposed above the pit of the safety system pump suction port, the combiner box is connected to the bus tube channel, the filter tube assembly is provided with a filter assembly, and the filter assembly adopts a plate-like combination or a column-like combination structure on the plate or the column. A filter hole for filtering the slag is provided on the surface.
- the filter plate of the filter assembly is adopted
- the wavy perforated plate is used to increase the filtration area; the diameter or side length of the filter element is less than 2.1 ⁇ (or the required aperture).
- the filter assembly of the plate-like combined structure is arranged in multiple layers; the filter assembly is disposed at the top of the manifold channel, or at the top and the upper portion of the manifold channel, or at the top and the upper sides of the manifold channel, Or the circumferential direction of the manifold channel.
- the cross section of the manifold channel may be circular, elliptical, square, polygonal or rectangular.
- the filtering module may adopt a combined mounting manner of a plate-like combined structure and a column-shaped combined structure filter assembly.
- the combiner box is connected to the base of the suction port of the safety system pump by a bolt, and the combiner box is a rectangular or square box body, and the top and the side of the combiner box are frame structures, which are arranged along the diagonal direction of the frame. Strengthen the beam.
- the beneficial effects of the invention are as follows:
- the invention adopts three-stage filtration, and the slag trash rack can intercept large debris and prevent external impact, improve the ability of the filter to cope with accidents, and improve the safety of the system;
- the pump suction filter has a similar or identical screen surface that intercepts and stores most of the slag, greatly reducing the amount of slag reaching the final stage of the filter and ensuring water quality within the IRWST, as it reaches the pump suction port.
- the amount of slag is greatly reduced, so that the filtration area of the last stage filter can be reduced while maintaining a low pressure drop, and the total amount of fine particles and fibers passing through the filter is reduced, thereby reducing the possibility of downstream clogging.
- Sex improve reactor safety; and three-stage filter, smaller footprint, more flexible layout, no need for large space, and suitable for underwater environment of internal displacement tank.
- FIG. 1 is a schematic view showing a mounting structure of a pit filter in the prior art
- FIG. 2 is a schematic structural view of a water tank filter system for a replacement tank in a containment of the present invention
- FIG. 3 is a schematic structural view of a slag trap grill of the present invention.
- Figure 4 is a schematic view showing the structure of the slag retention basket of the present invention
- Figure 5 is a schematic view showing the structure of a filter module of the pump suction port filter of the present invention
- FIG. 6 to FIG. 10 are schematic diagrams of a manifold path of different cross-sectional shapes of the filter of the present invention
- FIGS. 11 to 14 are schematic views showing various connection modes of the filter assembly and the manifold channel of the present invention
- FIG. 15 is a column structure filter assembly. Schematic diagram of the installation method of the manifold channel
- Figure 16 is a schematic view showing the structure of a combiner box frame in which a reinforcing beam is provided. detailed description
- the invention adopts a three-stage filter at the internal displacement water tank (IRWST) by changing the conventional single-stage filtration of the filter into a three-stage filtration, intercepting the slag under the accident condition, and finely distilling the water collected by the IRWST. Filtration to ensure that water entering the containment spray system (CSP) and safety injection system (RSI) does not cause blockage of the nozzles on the CSP system sprinkler ring and supports the fuel rod support grille during the RSI system recirculation phase Blocked.
- CSP containment spray system
- RSI safety injection system
- the present invention provides a containment water tank filter system including a slag trash rack 4 disposed above a hole 7 of an upper floor of an inner displacement tank, below the hole 7 of the upper floor.
- the inner displacement water tank is provided with a slag retention basket 5, and the upper opening height of the slag retention basket 5 is higher than the highest liquid level of the liquid in the inner displacement water tank, and the opening is aligned with the upper floor hole 7 of the inner displacement water tank;
- the slag retention basket 5 is independently set with the pump suction port filter 6, or the slag retention basket 5 is connected with the pump suction port filter 6 by a fixing device; the slag trash rack 4, the slag retention basket 5
- the pump suction filter 6 forms a three-stage filtration system.
- the present invention designs the slag trash rack as a wave curved structure, as shown in FIG.
- the ribs are added to the bottom design of the slag trap 4, and the trash rack is prevented from falling out into the inner tank.
- the slag retention basket 5 is fixedly disposed in the inner displacement water tank, the height of the slag retention basket 5 is higher than the highest liquid level of the liquid in the inner displacement tank, and the opening of the slag retention basket 5 is aligned with the upper floor of the inner displacement tank Hole 3, as shown in Figure 2.
- the upper floor of the inner displacement water tank has a plurality of holes 7, and a stagnant basket 5 is provided below the holes 7.
- the structure of the slag retention basket 5 is as shown in Fig. 4.
- the slag retention basket 5 should have an open area capable of accepting all the water flow and slag from the upstream; to prevent the slag from being left behind in the slag retention basket, If necessary, a slag collecting slab may be disposed around the opening of the slag retention basket 5; the slag retention basket 5 further includes a reinforcing rib for bearing weight, ensuring that the slag retention basket 1 has sufficient strength while storing the slag Withstand the impact of water flow.
- the specific introduction of the slag retention basket can be referred to the applicant's patent application 201220698458. 5 "A device for intercepting and storing slag".
- the pump suction filter comprises a plurality of filter modules arranged along the annular zone of the displacement tank in the containment, and a base is provided on four sides of the suction port of the safety system pump, and the filter module is fixed on the base.
- Pump Suction The filter settings are modular and each filter assembly is connected by dozens of filter modules. The filter pressure drop due to upstream analysis of the amount of slag needs to ensure the net positive suction head requirements of the system pump downstream of the suction port.
- the filter will be submerged in the internal displacement tank water for a long time, and the filter assembly can be flexibly arranged.
- each of the filter modules 9 includes a combiner box 11 disposed above the pit of the safety system pump suction port, and the combiner tank 11 is connected to the manifold channel 12 along the two sides of the annular zone 10, and on the manifold channel 12
- a filter assembly 13 is provided, and the filter assembly 13 is formed by a plate-like combination or a columnar combination structure, and a filter hole for filtering the slag is provided on the plate or the cylinder surface.
- a combiner box is a box or box container that collects and holds water.
- the surrounding or top can be a solid partition or a steel plate that acts as a mounting frame.
- the bottom is not closed, allowing the suction of the pump to allow water to flow from the pump.
- Outflow; the manifold channel refers to a channel or trough device that is not closed at both ends in the axial direction and is connected by flanges and connected to each other to allow the flow of the collected water to flow.
- the cross section may be circular or rectangular. Square or oval shape. In addition to the location where the filter assembly is installed and the flange joints, the sides of the manifold are physically closed to support the frame and collect water.
- four safety system pump suction port pits may be disposed in the containment area of the containment I RWST, and separate filter module assemblies are provided for each pit to satisfy Filtering requirements.
- some filter module assemblies can be shared by the same series of injection injection systems to meet the filter area requirements.
- Each of the suction port filter assemblies of the present invention is substantially submerged under water at a height of at least 10 Torr or other desired height dimension.
- a number of manholes for maintenance and inspection are provided to the filter assembly.
- the footprint of the entire filter assembly takes into account the space requirements of the person walking along the active area.
- the combiner box 11 located above the pit 8 of the safety system pump suction port is a square or rectangular parallelepiped structure for facilitating a fixed connection to the floor or wall. Fixed connection to the ground and wall to ensure sealing Large debris and particles enter the suction port of the safety system pump.
- the combiner box 11 is connected to the header channel 12 along both sides of the annular zone.
- the combined surface of the combiner box is basically a solid steel plate, and if necessary, a vent or exhaust duct is added.
- the manifold channel 12 is a fluid collection component that extends outwardly from the pit manifold.
- the cross section of the manifold 12 can be a circular, elliptical, square, polygonal or rectangular shape (see Figures 6-10).
- the basic combined surface of the manifold channel 12 is a solid steel plate. Make the necessary opening design for the location where the filter assembly 13 is to be installed.
- the manifold channel 12 can be properly installed with filter components 1 3 except for the area connected to the ground.
- the filter assembly 1 3 can be connected to the manifold channel 12 in a variety of similar forms such as top-loading, upper-side mounting, three-side mounting, and wraparound (see Figures 11-14).
- Figure 1 is a top-loading type, the filter assembly 13 is disposed at the top of the manifold channel 12;
- Figure 12 is the upper side mounting type, and the filter assembly 13 is disposed at the top and one side of the header channel 12;
- the filter assembly 13 is disposed at the top and the upper sides of the manifold channel 12;
- FIG. 14 is a wraparound type, and the filter assembly 13 is disposed in the circumferential direction of the manifold channel 12.
- the filter component is a filter element mounted on the manifold channel, which may adopt a plate-like combination or a column-like combination structure, and the filter assembly of the plate-like composite structure is arranged in multiple layers, and holes are punched on the plate and on the cylinder surface for filtering. Crushed residue:
- Plate-like composite structure The installation method of the plate-like combined filter assembly and the bus passage is shown in Figure 11 - Figure 14. These different connection methods can be applied to different processing requirements, layout requirements, filtration requirements, special side mounting, three Side-mounted or wrap-around filter assemblies are installed to ensure that water flows from the lower part of the filter assembly into the manifold path to ensure confluence.
- the installation of the columnar composite structure filter assembly and the manifold channel is shown in Figure 15.
- the plate-like composite filter plate may be a wavy perforated plate, such as the structure of Figure 3, to increase the filtration area and accommodate more debris.
- connection between the confluence box 1 1 and the components of the filter assembly 1 3 is bolted to avoid thermal deformation due to the welded connection, which affects the stability and robustness of the structure.
- the entire filter can also be assembled according to the actual installation requirements and conditions, using a combination of plate-like composite structure and column-shaped composite structure filter assembly.
- the base is installed on the four sides of the suction port of the safety system pump.
- the base is connected with the upper combiner box by bolts.
- the combiner box is a rectangular or square box. Except for the bottom, the other sides can be framed and set in the diagonal direction. Reinforce the beam, see Figure 16.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- High Energy & Nuclear Physics (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
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 (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201210549550XA CN103047129A (zh) | 2012-12-17 | 2012-12-17 | 核电站内置换料水箱内安全系统泵吸入口过滤器 |
CN201210548088.1A CN103028285B (zh) | 2012-12-17 | 2012-12-17 | 安全壳内置换料水箱过滤器系统 |
CN201210548088.1 | 2012-12-17 | ||
CN201210549550.X | 2012-12-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014094567A1 true WO2014094567A1 (zh) | 2014-06-26 |
Family
ID=50977598
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2013/089204 WO2014094567A1 (zh) | 2012-12-17 | 2013-12-12 | 安全壳内置换料水箱过滤器系统 |
Country Status (3)
Country | Link |
---|---|
GB (1) | GB2522822B (zh) |
MY (1) | MY188132A (zh) |
WO (1) | WO2014094567A1 (zh) |
Citations (10)
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 |
CN2559637Y (zh) * | 2002-06-04 | 2003-07-09 | 上海达源环境科技工程有限公司 | 高效截固机 |
CN101102827A (zh) * | 2004-11-15 | 2008-01-09 | 加拿大原子能有限公司 | 带翼片的滤器 |
US20080223779A1 (en) * | 2004-05-14 | 2008-09-18 | Continuum Dynamics, Inc. | Low Head Loss Modular Suction Strainer with Contoured Surfaces |
CN201505480U (zh) * | 2009-05-25 | 2010-06-16 | 中国广东核电集团有限公司 | 安全壳地坑过滤器组件 |
CN201556427U (zh) * | 2009-11-23 | 2010-08-18 | 中广核工程有限公司 | 一种核电站安全壳地坑及其滤网 |
CN101947397A (zh) * | 2010-07-22 | 2011-01-19 | 中科华核电技术研究院有限公司 | 卧式压水堆核电站安全壳地坑过滤器 |
TW201114472A (en) * | 2009-06-23 | 2011-05-01 | Ca Atomic Energy Ltd | Vaned filtering element |
CN103028285A (zh) * | 2012-12-17 | 2013-04-10 | 中国核电工程有限公司 | 安全壳内置换料水箱过滤器系统 |
CN103047129A (zh) * | 2012-12-17 | 2013-04-17 | 中国核电工程有限公司 | 核电站内置换料水箱内安全系统泵吸入口过滤器 |
-
2013
- 2013-12-12 MY MYPI2015701933A patent/MY188132A/en unknown
- 2013-12-12 GB GB1509986.4A patent/GB2522822B/en active Active
- 2013-12-12 WO PCT/CN2013/089204 patent/WO2014094567A1/zh active Application Filing
Patent Citations (10)
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 |
CN2559637Y (zh) * | 2002-06-04 | 2003-07-09 | 上海达源环境科技工程有限公司 | 高效截固机 |
US20080223779A1 (en) * | 2004-05-14 | 2008-09-18 | Continuum Dynamics, Inc. | Low Head Loss Modular Suction Strainer with Contoured Surfaces |
CN101102827A (zh) * | 2004-11-15 | 2008-01-09 | 加拿大原子能有限公司 | 带翼片的滤器 |
CN201505480U (zh) * | 2009-05-25 | 2010-06-16 | 中国广东核电集团有限公司 | 安全壳地坑过滤器组件 |
TW201114472A (en) * | 2009-06-23 | 2011-05-01 | Ca Atomic Energy Ltd | Vaned filtering element |
CN201556427U (zh) * | 2009-11-23 | 2010-08-18 | 中广核工程有限公司 | 一种核电站安全壳地坑及其滤网 |
CN101947397A (zh) * | 2010-07-22 | 2011-01-19 | 中科华核电技术研究院有限公司 | 卧式压水堆核电站安全壳地坑过滤器 |
CN103028285A (zh) * | 2012-12-17 | 2013-04-10 | 中国核电工程有限公司 | 安全壳内置换料水箱过滤器系统 |
CN103047129A (zh) * | 2012-12-17 | 2013-04-17 | 中国核电工程有限公司 | 核电站内置换料水箱内安全系统泵吸入口过滤器 |
Also Published As
Publication number | Publication date |
---|---|
GB2522822B (en) | 2020-09-02 |
MY188132A (en) | 2021-11-23 |
GB2522822A (en) | 2015-08-05 |
GB201509986D0 (en) | 2015-07-22 |
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