US20070084782A1 - Filter medium for strainers used in nuclear reactor emergency core cooling systems - Google Patents

Filter medium for strainers used in nuclear reactor emergency core cooling systems Download PDF

Info

Publication number
US20070084782A1
US20070084782A1 US11/243,637 US24363705A US2007084782A1 US 20070084782 A1 US20070084782 A1 US 20070084782A1 US 24363705 A US24363705 A US 24363705A US 2007084782 A1 US2007084782 A1 US 2007084782A1
Authority
US
United States
Prior art keywords
filter medium
strainer
eccs
water
module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/243,637
Inventor
James Smith
Atul Patel
Louis Carr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Enercon Services Inc
Original Assignee
Enercon Services Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Enercon Services Inc filed Critical Enercon Services Inc
Priority to US11/243,637 priority Critical patent/US20070084782A1/en
Assigned to ENERCON SERVICES, INC. reassignment ENERCON SERVICES, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CARR, LOUIS THOMAS JR., PATEL, ATUL HARIHAR, SMITH, JAMES AARON
Priority to CNA2006800450312A priority patent/CN101321569A/en
Priority to KR1020087010893A priority patent/KR20080059631A/en
Priority to PCT/US2006/032449 priority patent/WO2007044127A2/en
Publication of US20070084782A1 publication Critical patent/US20070084782A1/en
Priority to US12/465,253 priority patent/US8054932B2/en
Priority to US12/568,327 priority patent/US8048319B2/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
    • G21C15/18—Emergency cooling arrangements; Removing shut-down heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
    • B01D29/54—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection arranged concentrically or coaxially
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
    • G21C15/18—Emergency cooling arrangements; Removing shut-down heat
    • G21C15/182—Emergency cooling arrangements; Removing shut-down heat comprising powered means, e.g. pumps
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Structure Of Emergency Protection For Nuclear Reactors (AREA)
  • Filtering Materials (AREA)

Abstract

A filter medium for strainers used in the emergency sump of a nuclear power plant ECCS. The filter medium is employed with double wall, concentric tube type strainer modules. The filter medium is preferably constructed of a woven or knitted stainless steel wire material and is shaped in a cylinder so that it can be inserted between an external and an internal strainer of a double wall, concentric tube type strainer in such a manner that water that passes through the strainer must pass through and be filtered by the filter medium before the water can be pumped to the reactor core. The filter medium is inserted through the bottom of the strainer module and is held in place by an x-shaped retainer.

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The present invention relates to a filter medium that is used in conjunction with concentric tube type strainers used in emergency core cooling systems (ECCS) of nuclear power plants. Specifically, the present invention is a woven or knitted stainless steel filter medium that is inserted between an external and an internal double wall concentric tube type strainer and through which water must pass and be filtered after the water passes through the strainer and before the water can be pumped to the reactor core.
  • 2. Description of the Related Art
  • The containment sump, which is also known as the emergency or recirculation sump, is part of the Emergency Core Cooling System or ECCS of a nuclear power plant. The ECCS is one of several safety systems required by the Nuclear Regulatory Commission or NRC in every nuclear power plant constructed in the United States. The ECCS is required in order to mitigate a design basis accident.
  • The containment sump collects reactor coolant and chemically reactive spray solutions following a loss-of-coolant-accident or LOCA. The containment sump serves as the water source to support long-term recirculation for the functions of residual heat removal, emergency core cooling, and containment atmosphere cleanup. Thus this water source and related equipment are important safety components of the nuclear power plant.
  • Typically, the containment sump is surrounded by a debris strainer to prevent debris from entering the ECCS suction lines. The strainer is constructed with a plurality of perforated strainer modules that serve to strain and filter out fibrous and particulate debris and other material from recirculation water that enters the nuclear power plant containment sump during an emergency core cooling event. It is important to filter out this debris from the water before the water passes into the pumps of the ECCS. Debris can block or restrict flow through the openings in the strainer or, if allowed to pass through the strainer and into the pumps of the ECCS, can damage the ECCS pumps and components in the systems served by the ECCS pumps such as the reactor.
  • The present invention reduces or eliminates debris and other material that potentially passes through the strainers used in nuclear power plant containment sumps. For a typical strainer, debris quantities that can bypass or pass through the openings of the emergency strainers are typically on the order of five percent or more of the total debris and material that deposits onto the strainer surface. Thus a significant amount of debris typically will pass through the strainer. The amount of debris and material passing through the strainer has been shown to have potentially adverse affects on equipment and components downstream of the strainer. This can include excessive wear, plugging, blockage, fouling, etc. This can result in equipment failure, decreased equipment life, clogging of the reactor fuel cooling paths, etc. Hence the purpose of the present invention is to reduce or eliminate the bypassing of debris and material in order to minimize or eliminate adverse affects on downstream equipment and components.
  • The nuclear power industry has not employed any type of filter medium in association with the strainers that could become clogged because this could result in loss of head pressure, cause loss of suction on the pumps resulting in cavitation, and thereby preventing the flow of cooling water to the reactor. Thus, the addition of filter medium to the strainers goes against current practice in the industry.
  • The present invention consists of the primary strainer device, which is typically constructed of perforated stainless steel, coupled with a custom designed filter medium insert of stainless steel knitted or woven wire mesh. The drawings that are attached depict a particular perforated strainer design and utilize a cylindrical knitted wire mesh shape filter medium to act as the secondary filter. However, the filtering medium can be produced in various shapes and configurations for use with different strainer configurations.
  • The knitted or woven wire mesh filter medium is customized by using various diameters, densities, crimping styles, and configurations to optimize the reduction of bypassed debris and other material for each particular application. The knitted or woven wire mesh is located inside of or on the downstream side of the primary strainer and, as such, serves as a secondary filtering medium, with the strainer serving the primary filtering function. The debris straining effect of the primary strainer combines with the secondary filter to produce a system that greatly reduces bypassed debris and other material potentially encountered during recirculation operation of the ECCS and it does so with no significant increase in fluid pressure drop across the combination strainer and filter.
  • The combination strainer and filter of the present invention produces two physical factors that reduce or eliminate the bypassing of debris and other material. The first is bypass resistance and the second is entrapment of the debris or other material on the filter medium.
  • Bypass resistance is the physical resistance to debris and other material from passing through openings in the primary strainer. Use of the knitted or woven wire mesh secondary filter medium in combination with the strainer causes an increase in bypass resistance associated with the primary strainer. This bypass resistance factor tends to cause a significant fraction of the debris and other material that may otherwise pass through the primary strainer to remain on the upstream surface of the primary strainer.
  • For debris and other material that manages to pass through the openings in the primary strainer, the knitted or woven wire mesh secondary filter medium entraps most, if not all, of the remaining debris and other material within the convoluted wire mesh structure, and thus prevents it from passing into the downstream flow of cooling water traveling to the ECCS pumps.
  • The present invention is designed to function as a totally passive device without requiring electrical power, periodic replacement, or human intervention or operation, other than periodic inspections approximately once every 18 to 24 months. The use of stainless steel material for the filter medium will ensure the present invention has long term functionality, will not be affected by corrosive conditions, and can remain submerged in the containment water conditions expected following a postulated LOCA.
    • SUMMARY OF THE INVENTION
  • The present invention is a filter medium for strainers used in the emergency core cooling system of nuclear power plants. The filter medium is used in conjunction with double wall, concentric tube type strainer modules. The filter medium is preferably constructed of a woven or knitted stainless steel wire material and is shaped in a cylinder so that it can be inserted between an external and an internal strainer of a double wall, concentric tube type strainer in such a manner that water that passes through the strainer must pass through and be filtered by the filter medium before the water can be pumped to the reactor core.
  • The cylindrical filter medium is held in position between the external and internal strainers of each double wall concentric tube type strainer typically by an x-shaped retainer.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a diagram showing the prior art relationship of concentric tube type strainers employed in a nuclear plant ECCS sump.
  • FIG. 2 is a cross sectional view of several prior art concentric tube type strainers taken along line 2-2 of FIG. 1.
  • FIG. 3 is an enlarged view of a concentric tube type strainer located within circle 3 of FIG. 2 showing the flow pattern of water passing through the strainer.
  • FIG. 4 is a bottom perspective view of a concentric tube type strainer with a filter according to the present invention being inserted into the strainer from the bottom of the strainer and with the retention means removed from the strainer for clarity.
  • FIG. 5 is a top perspective view of a concentric tube type strainer with filter constructed in accordance with a preferred embodiment of the present invention.
  • FIG. 6 is a bottom perspective view of the concentric tube type strainer with filter shown in FIG. 5.
  • FIG. 7 is a cross sectional view similar to FIG. 2 showing concentric tube strainers with filters as they would appear when installed in a sump.
  • FIG. 8 is an enlarged view of a concentric tube type strainer with filter located within circle 8 of FIG. 7 with retention means removed and showing the flow pattern of water passing through the strainer with filter.
  • FIG. 9 is a bottom plan view of the strainer with filter taken along line 9-9 of FIG. 6 showing the retention means for holding the filter within the strainer.
    • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Prior Art
  • Referring now to the drawings and initially to FIGS. 1, 2, and 3, there is illustrated a prior art installation of a concentric tube type strainer 10 in a containment emergency sump 12 in association with a reactor core 14 of a nuclear power plant. As illustrated in FIG. 1, the sump 12 is a part of the Emergency Core Cooling System or ECCS for the nuclear power plant. The ECCS functions to collect chemically reactive spray solutions and reactor coolant, normally in the form of water, in the sump 12 following a loss-of-coolant-accident or LOCA. The ECCS also functions to strain out large debris from the water and to recirculate that strained water to the reactor core 14 to prevent the core 14 from overheating.
  • As shown in FIG. 1 and in more detail in FIGS. 2 and 3, the strainer 10 is provided with a plurality of concentric tube type strainer modules 16 that are located under the water level 18 within the sump 12. Each strainer module 16 attaches via its bottom flange 20 to a plenum box 22 so that the bottom or downstream side 24 of the strainer module 16 is in liquid communication with an interior cavity 26 of the plenum box 22 as will be more fully described hereafter. Each concentric tube type strainer module 16 is provided with two strainer walls: an exterior cylindrical strainer wall 28 and an interior cylindrical strainer wall 30. The exterior and interior walls 28 and 30 are spaced apart so that a cylindrical interior space 32 is formed between the double walls 28 and 30 within each module 16 on the downstream side of its walls 28 and 30. Both the exterior and interior strainer walls 28 and 30 are preferably constructed of perforated stainless steel cylinders. As illustrated in FIG. 3, the perforations 34 provided in the walls 28 and 30 are typically in the size range of 1/16 to ¼ inch in diameter. A lower edge 36 of the exterior strainer 28 for each module 16 is attached to the bottom flange 20 at a circular opening 38 provided in the flange 20, and an upper edge 40 of the exterior strainer 28 in attached to a top sealing ring 42. An upper edge 44 of the interior strainer 30 in also attached to the top sealing ring 42, and a lower edge 46 of the interior strainer 30 is attached at a periphery 48 of a circular bottom plate 50.
  • The circular bottom plate 50 and the bottom flange 20 are located in approximately the same plane. The circular bottom plate 50 is located within the circular opening 38 provided in the bottom flange 20 and spaced apart from the bottom flange 20 so that the cylindrical interior space 32 is continuous to the bottom 24 of the module 16. As illustrated in FIG. 3, the bottom flange 20 of each module 16 attaches to the plenum box 22 at an associated plenum box opening 52 via bolts 54 that extend through bolt openings 56 and 58 provided in respectively in the bottom flange 20 and the plenum box 22. When the module 16 is thus attached to the plenum box 22, the cylindrical interior space 32 of the module 16 is in liquid communication with the interior cavity 26 of the plenum box 22. Thus, when the concentric tube type strainer 10 is assembled, water located in the sump 12 must flow through and be strained by one of the perforated strainer walls 28 or 30 in order to enter the plenum box 22.
  • As shown by the arrows in FIG. 3 which depict the flow path of the water through a module 16, water from the sump 12 flows around each strainer module 16 and passes through either the exterior or interior perforated cylindrical wall 28 or 30 into the cylindrical interior space 32 provided between the two wall 28 and 30. The strained water then passes out of the cylindrical interior space 32 at the bottom 24 of the module 16 and into the interior cavity 26 of the plenum box 22 with which the cylindrical interior space 32 communicates.
  • From here, as illustrated in FIG. 1, the water then flows via a water suction line 60 to the Emergency Core Cooling System or ECCS pump 62 which delivers the water to the reactor core 14 via a water discharge line 66.
    • The Invention
  • FIGS. 4, 5, 6, 7, 8 and 9 illustrate a filter medium 100 for use in conjunction with strainers 10 used in ECCS of nuclear power plants. The filter medium 100 is constructed in accordance with a preferred embodiment of the present invention. The filter medium 100 is preferably constructed of woven or knitted stainless steel wire mesh that has been formed into a cylinder so that it can be inserted into the interior space 32 provided between the two walls 28 and 30 of a strainer module 16 and completely fills that interior space 32. The filter medium 100 is inserted in the interior space 32 in such a manner that water that passes through the walls 28 and 30 of the strainer module 16 must also pass through and be filtered by the filter medium 100 before the water can be pumped to the reactor core 14.
  • FIG. 4 illustrates a filter medium 100 being inserted into an interior space 32 of a strainer module 16 via a ring-shaped opening 68 provided at the bottom 24 of the module 16. The ring-shaped opening is located between the opening 38 in the bottom flange 20 and the circular bottom plate 50 and is where the interior space 32 of the module 16 joins with the interior cavity 26 of the plenum box 22.
  • As illustrated in FIGS. 3, 5 and 6, once the filter medium 100 has been fully inserted into the strainer module 16, a top 102 of the filter medium 100 abuts the top sealing ring 42 and a bottom 104 of the filter medium 100 is approximately flush with the bottom 24 of the strainer module 16. As illustrated in FIG. 9, an x-shaped retention means 106 is provided attached to the strainer module 16 and designed for holding the filter medium 100 within the strainer module 16.
  • As illustrated in FIGS. 7 and 8, the flow pattern for water through the strainer 10 and filter 100 of the present invention is no different from that illustrated in FIGS. 2 and 3 for the prior art strainer 10 except that in the present invention the water flows through the filter medium 100 that is located in the interior space 32 of the strainer module 16 before entering the plenum box 22. Addition of filter medium 100 to the existing strainer modules 16 does not adversely affect the head pressure in the water suction line 60 that delivers water to the ECCS pump 62.
  • While the invention has been described with a certain degree of particularity, it is manifest that many changes may be made in the details of construction and the arrangement of components without departing from the spirit and scope of this disclosure. It is understood that the invention is not limited to the embodiments set forth herein for the purposes of exemplification, but is to be limited only by the scope of the attached claim or claims, including the full range of equivalency to which each element thereof is entitled.

Claims (7)

1. Filter medium for strainers used in nuclear power plant ECCS comprising:
filter medium secured immediately downstream of a strainer in a water flow path of an ECCS system for a nuclear reactor and located upstream in the water flow path of an ECCS pump so that water that has flowed through the strainer must first pass through the filter medium before it can reach the ECCS pump, and
said filter medium constructed of stainless steel wire material.
2. Filter medium for strainers used in nuclear power plant ECCS according to claim 1 further comprising:
said filter medium formed into the shape of hollow cylinders so that the cylindrical filter medium can be inserted into a space created on the downstream side of each double wall strainer module provided on the strainer.
3. Filter medium for strainers used in nuclear power plant ECCS according to claim 2 further comprising:
retention means associated with each cylindrical filter medium for securing the cylindrical filter medium within its associated strainer module.
4. Filter medium for strainers used in nuclear power plant ECCS according to claim 1 wherein said filter medium is constructed either of woven stainless steel wire or knitted stainless steel wire.
5. A combination filter medium and strainer used in nuclear power plant ECCS comprising:
a strainer provided in an emergency sump for a nuclear reactor, said strainer provided with a plurality of strainer modules, each strainer module secured to a plenum box that communicates via a water suction line with an ECCS pump for supplying water to a reactor core, each strainer module provided with spaced apart double walls that form a cylindrical interior space on the downstream side of the double walls, and
a cylindrical filter medium secured between the double walls so that the filter medium is located within the cylindrical interior space.
6. A combination filter medium and strainer used in nuclear power plant ECCS according to claim 5 further comprising:
said cylindrical filter medium secured between the double walls of its associated strainer module by retention means, and said retention means secured to a bottom of said strainer module in such a way as to removably block the insertion in or removal of the cylindrical filter medium relative to its associated strainer module.
7. A method for filtering water contained in a containment sump of an ECCS for a nuclear reactor through a combination filter medium and strainer comprising:
straining water from a containment sump through a perforated strainer in an ECCS to remove the larger particles of debris and other matter from the water,
filtering the strained water that has passed through the perforated strainer through a filter medium constructed of woven or knitted stainless steel wire material to remove the majority of the remaining debris and other matter from the strained water, and pumping the strained and filtered water that has passed through the filter medium to a reactor core by use of an ECCS pump.
US11/243,637 2005-10-05 2005-10-05 Filter medium for strainers used in nuclear reactor emergency core cooling systems Abandoned US20070084782A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US11/243,637 US20070084782A1 (en) 2005-10-05 2005-10-05 Filter medium for strainers used in nuclear reactor emergency core cooling systems
CNA2006800450312A CN101321569A (en) 2005-10-05 2006-08-24 Filter medium for strainers used in nuclear reactor emergency core cooling systems
KR1020087010893A KR20080059631A (en) 2005-10-05 2006-08-24 Filter medium for strainers used in nuclear reactor emergency core cooling systems
PCT/US2006/032449 WO2007044127A2 (en) 2005-10-05 2006-08-24 Filter medium for strainers used in nuclear reactor emergency core cooling systems
US12/465,253 US8054932B2 (en) 2005-10-05 2009-05-13 Filter medium for strainers used in nuclear reactor emergency core cooling systems
US12/568,327 US8048319B2 (en) 2005-10-05 2009-09-28 Filter medium for strainers used in nuclear reactor emergency core cooling systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/243,637 US20070084782A1 (en) 2005-10-05 2005-10-05 Filter medium for strainers used in nuclear reactor emergency core cooling systems

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US12/465,253 Continuation-In-Part US8054932B2 (en) 2005-10-05 2009-05-13 Filter medium for strainers used in nuclear reactor emergency core cooling systems
US12/465,253 Continuation US8054932B2 (en) 2005-10-05 2009-05-13 Filter medium for strainers used in nuclear reactor emergency core cooling systems

Publications (1)

Publication Number Publication Date
US20070084782A1 true US20070084782A1 (en) 2007-04-19

Family

ID=37943269

Family Applications (2)

Application Number Title Priority Date Filing Date
US11/243,637 Abandoned US20070084782A1 (en) 2005-10-05 2005-10-05 Filter medium for strainers used in nuclear reactor emergency core cooling systems
US12/568,327 Active 2029-09-18 US8048319B2 (en) 2005-10-05 2009-09-28 Filter medium for strainers used in nuclear reactor emergency core cooling systems

Family Applications After (1)

Application Number Title Priority Date Filing Date
US12/568,327 Active 2029-09-18 US8048319B2 (en) 2005-10-05 2009-09-28 Filter medium for strainers used in nuclear reactor emergency core cooling systems

Country Status (4)

Country Link
US (2) US20070084782A1 (en)
KR (1) KR20080059631A (en)
CN (1) CN101321569A (en)
WO (1) WO2007044127A2 (en)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060219645A1 (en) * 2003-05-15 2006-10-05 Continuum Dynamics, Inc. Self-cleaning strainer
US20070138072A1 (en) * 2005-11-02 2007-06-21 Continuum Dynamics, Inc. Trash rack for nuclear power plant
US20090166284A1 (en) * 2006-07-28 2009-07-02 Dieter Theis Filter System
US20090184064A1 (en) * 2008-01-23 2009-07-23 Sohail Zaiter Scalable immersed-filtration method and apparatus
US20100025315A1 (en) * 2005-10-05 2010-02-04 James Aaron Smith Filter medium for strainers used in nuclear reactor emergency core cooling systems
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
US20110084008A1 (en) * 2009-10-13 2011-04-14 Stanislaw Kielbowicz Increased efficiency strainer system
US20110084009A1 (en) * 2009-10-13 2011-04-14 Stanislaw Kielbowicz Increased efficiency strainer system
US20110215059A1 (en) * 2005-10-05 2011-09-08 James Aaron Smith Filter medium for strainers used in nuclear reactor emergency core cooling systems
US20110297627A1 (en) * 2010-06-07 2011-12-08 Bhi Co., Ltd. Strainer wall structure, filtration method using the same, and method of fabricating the same
US20120037572A1 (en) * 2010-08-12 2012-02-16 Bhi Co., Ltd. Strainer wall structure including curved sections, method of manufacturing the same, and filtering method using the same
WO2012166307A1 (en) * 2011-06-01 2012-12-06 Transco Products Inc. High capacity suction strainer for an emergency core cooling system in a nuclear power plant
US20130256236A1 (en) * 2012-04-03 2013-10-03 Chun-Ping Huang Purifying device for sludge under water and methof for operating the same
US20140246365A1 (en) * 2013-03-01 2014-09-04 Graver Technologies, Llc "underdrain filter for power generation and liquid process filtration vessels and method of using the same"
CN105169786A (en) * 2015-09-10 2015-12-23 中科华核电技术研究院有限公司 Recirculation filter of nuclear island containment
US9715947B2 (en) 2013-08-09 2017-07-25 Ge-Hitachi Nuclear Energy Americas Llc Systems for debris mitigation in nuclear reactor safety systems
US9741458B2 (en) 2011-04-21 2017-08-22 Performance Contracting, Inc. Multimodal debris trap
US9997264B2 (en) 2012-02-14 2018-06-12 Control Components, Inc. Enhanced nuclear sump strainer system
US20220088527A1 (en) * 2020-09-18 2022-03-24 Pall Corporation Branched filter and method of use
US11428219B2 (en) * 2019-04-12 2022-08-30 Cameron Farms Hutterite Colony Liquid intake filters

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2955695B1 (en) * 2010-01-28 2012-04-20 Bertin Technologies Sa FILTERING PANEL FOR A SAFETY INJECTION CIRCUIT AND ASPIRATION OF A NUCLEAR REACTOR
US9561454B2 (en) * 2012-10-09 2017-02-07 Ovivo Inc. Debris filter with splitter bar
JP6146272B2 (en) * 2013-11-22 2017-06-14 トヨタ自動車株式会社 Power receiving device and power transmitting device
FR3053375A1 (en) * 2016-07-04 2018-01-05 Amalis-Assainissement Maintenance Assistance Logistique Sur Installations Et Services TOOL FOR CLEANING A SWIMMING POOL, IN PARTICULAR IN A RADIOACTIVE ENVIRONMENT, COMPRISING A TANK
EA039228B1 (en) * 2017-06-30 2021-12-21 Акционерное Общество "Наука И Инновации" (Ао "Наука И Инновации") Vver emergency cooling system sump protection device and filter module of sump protection device
EP3733257A4 (en) * 2017-12-29 2021-08-18 Joint-Stock Company Scientific Research and Design Institute for Energy Technologies Atomproekt Active filter of a nuclear power station sump tank
RU2720116C1 (en) * 2019-12-30 2020-04-24 Акционерное Общество "Научно-Исследовательский И Проектно-Конструкторский Институт Энергетических Технологий "Атомпроект" Self-cleaning fluid cleaning system
CN114177687B (en) * 2021-10-22 2023-12-26 中广核研究院有限公司 Backwash device and pit filter

Citations (82)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1140726A (en) * 1914-01-05 1915-05-25 William F Warden Filter.
US2442818A (en) * 1945-11-26 1948-06-08 William E Lyman Strainer
US3929567A (en) * 1972-04-11 1975-12-30 Siemens Ag Nuclear reactor equipped with a flooding tank and a residual heat removal and emergency cooling system
US4138319A (en) * 1975-12-02 1979-02-06 Kraftwerk Union Aktiengesellschaft Nuclear reactor installation with a light-water reactor
US4225328A (en) * 1977-11-17 1980-09-30 Delbag-Luftfilter Gmbh Exchangeable filter element
US4280906A (en) * 1979-11-21 1981-07-28 Ab Asea-Atom Filter for separating solid contaminants from a fluid, especially solid contaminants in a reactor cooling water used in nuclear reactor plants
US4331460A (en) * 1979-08-04 1982-05-25 Kernforschungszentrum Karlsruhe Gmbh Mist collector for separating drops of liquid from streams of gas for vapor
US4376091A (en) * 1979-04-02 1983-03-08 Zurn Industries, Inc. Mechanical strainer unit
US4446099A (en) * 1980-07-31 1984-05-01 Framatome Device for protecting control cluster actuating mechanisms during the testing of a nuclear reactor
US4597871A (en) * 1979-05-25 1986-07-01 Hitachi, Ltd. Apparatus for removing foreign matters
US4610838A (en) * 1984-07-26 1986-09-09 Westinghouse Electric Corp. Method for removing debris from a nuclear reactor vessel
US4652425A (en) * 1985-08-08 1987-03-24 Westinghouse Electric Corp. Bottom grid mounted debris trap for a fuel assembly
US4655995A (en) * 1984-05-11 1987-04-07 Westinghouse Electric Corp. Reversible BWR fuel assembly and method of using same
US4664880A (en) * 1984-12-07 1987-05-12 Westinghouse Electric Corp. Wire mesh debris trap for a fuel assembly
US4678627A (en) * 1985-04-04 1987-07-07 Westinghouse Electric Corp. Debris-retaining trap for a fuel assembly
US4684495A (en) * 1984-11-16 1987-08-04 Westinghouse Electric Corp. Fuel assembly bottom nozzle with integral debris trap
US4684496A (en) * 1984-11-16 1987-08-04 Westinghouse Electric Corp. Debris trap for a pressurized water nuclear reactor
US4753771A (en) * 1986-02-07 1988-06-28 Westinghouse Electric Corp. Passive safety system for a pressurized water nuclear reactor
US4772447A (en) * 1985-02-08 1988-09-20 Commissariat A L'energie Atomique Device for the spacing and holding in place of fuel rods in a fuel assembly
US4781884A (en) * 1987-03-02 1988-11-01 Combustion Engineering, Inc. Debris catching strainer grid
US4828791A (en) * 1987-10-05 1989-05-09 Westinghouse Electric Corp. Nuclear fuel assembly debris resistant bottom nozzle
US4832905A (en) * 1988-04-15 1989-05-23 Combustion Engineering, Inc. Lower end fitting debris collector
US4849161A (en) * 1987-02-19 1989-07-18 Advanced Nuclear Fuels Corp. Debris-resistant fuel assembly
US4900507A (en) * 1987-05-05 1990-02-13 Westinghouse Electric Corp. Nuclear fuel assembly debris filter bottom nozzle
US4909937A (en) * 1987-02-20 1990-03-20 Sartorius Gmbh Integral filters for separating fluid components and housing for them
US4919883A (en) * 1988-12-14 1990-04-24 Combustion Engineering, Inc. Lower end fitting debris collector and end cap spacer grid
US5024806A (en) * 1989-09-21 1991-06-18 Westinghouse Electric Corp. Enhanced debris filter bottom nozzle for a nuclear fuel assembly
US5030412A (en) * 1990-05-04 1991-07-09 Advanced Nuclear Fuels Corporation Fuel assembly debris screen
US5053122A (en) * 1990-09-13 1991-10-01 Micron Technology, Inc. Oil filtration and exhaust apparatus
US5100611A (en) * 1989-12-15 1992-03-31 Abb Atom Ab Fuel assembly for a light-wafer nuclear reactor
US5154197A (en) * 1990-05-18 1992-10-13 Westinghouse Electric Corp. Chemical cleaning method for steam generators utilizing pressure pulsing
US5225152A (en) * 1990-11-20 1993-07-06 Framatome Filtering bottom nozzle for a fuel assembly of a lightwater-cooled reactor
US5271051A (en) * 1992-06-24 1993-12-14 Westinghouse Electric Corp. Combined cooling and purification system for nuclear reactor spent fuel pit, refueling cavity, and refueling water storage tank
US5345483A (en) * 1993-12-02 1994-09-06 General Electric Company Lower tie plate strainers having double plate with offset holes for boiling water reactors
US5361287A (en) * 1994-03-29 1994-11-01 B&W Fuel Company Nuclear fuel assembly lower end fitting
US5390220A (en) * 1993-11-29 1995-02-14 General Electric Company Lower tie plate strainers including helical spring strainers for boiling water reactors
US5390221A (en) * 1993-08-23 1995-02-14 General Electric Company Debris filters with flow bypass for boiling water reactors
US5426679A (en) * 1994-04-20 1995-06-20 Vattenfall Utveckling Ab Strainer device for filtering water to an emergency cooling system in a nuclear power plant
US5453180A (en) * 1992-12-04 1995-09-26 Vattenfall Utveckling Ab Strainer for filtering water to an emergency cooling system in a nuclear power plant
US5478469A (en) * 1994-08-08 1995-12-26 B & W Nuclear Technologies Filter assembly for cooling water in a nuclear reactor
US5481577A (en) * 1994-06-30 1996-01-02 Siemens Power Corporation Boiling water reactor fuel assembly filter
US5483564A (en) * 1993-04-12 1996-01-09 General Electric Company Lower tie plate strainers including double corrugated strainers for boiling water reactors
US5496468A (en) * 1994-04-26 1996-03-05 Cormier; Reginald Waste water management system with an auxiliary reservoir
US5524031A (en) * 1994-06-30 1996-06-04 Siemens Power Corporation Attachable debris filter for BWR nuclear fuel assemblies
US5528640A (en) * 1994-11-07 1996-06-18 General Electric Company Low pressure double offset plate catcher for a nuclear reactor
US5539790A (en) * 1994-05-20 1996-07-23 Vattenfall Utveckling Ab Strainer device for filtering water to an emergency cooling system in a nuclear power plant
US5604777A (en) * 1995-03-13 1997-02-18 Westinghouse Electric Corporation Nuclear reactor coolant pump
US5612983A (en) * 1992-12-04 1997-03-18 Vattenfall Utveckling Ab Device for filtering water to an emergency cooling system in a nuclear power plant
US5640434A (en) * 1995-07-31 1997-06-17 Rottenberg; Sigmunt Miniaturized nuclear reactor utilizing improved pressure tube structural members
US5688402A (en) * 1995-12-15 1997-11-18 General Electric Company Self-cleaning strainer
US5696801A (en) * 1995-08-24 1997-12-09 Performance Contracting, Inc. Suction strainer with a internal core tube
US5705054A (en) * 1996-08-08 1998-01-06 Imatran Voima Oy Filtering system
US5748694A (en) * 1996-03-26 1998-05-05 General Electric Company Fuel bundle filter for a nuclear reactor fuel bundle assembly
US5759398A (en) * 1996-07-12 1998-06-02 Sulzer Thermtec Ag Screen for inlet opening of a pump
US5759399A (en) * 1997-01-08 1998-06-02 Continuum Dynamics, Inc. High capacity, low head loss, suction strainer for nuclear reactors
US5815544A (en) * 1997-02-20 1998-09-29 Lefter; Jan D. Self-cleaning strainer
US5828714A (en) * 1996-12-19 1998-10-27 Westinghouse Electric Corporation Enhanced passive safety system for a nuclear pressurized water reactor
US5835549A (en) * 1997-03-06 1998-11-10 Combustion Engineering, Inc. BWR emergency core cooling system strainer
US5867550A (en) * 1992-12-02 1999-02-02 Siemens Aktiengesellschaft Process for the production of a screen plate for a fuel assembly foot and corresponding fuel assembly
US5935439A (en) * 1997-02-19 1999-08-10 Performance Contracting, Inc. Suction system with end supported internal core tube suction strainers
US5969801A (en) * 1995-03-13 1999-10-19 Sony Corporation Correction method and correction apparatus of mask pattern
US6106592A (en) * 1998-03-17 2000-08-22 Monsanto Company Wet electrostatic filtration process and apparatus for cleaning a gas stream
US6254774B1 (en) * 1999-10-25 2001-07-03 James R. Henderson Apparatus for radioactive particulate filtration
US20020020678A1 (en) * 2000-08-21 2002-02-21 Loreno Terry Ross Method and apparatus for draining a barge or other like container
US6387261B1 (en) * 1998-09-15 2002-05-14 Gregory Mojena Serviceable filter with bypass
US20020057755A1 (en) * 2000-03-31 2002-05-16 Yukio Hemmi Nuclear power plant system and method of operating the same
US6477220B1 (en) * 1998-02-10 2002-11-05 Westinghouse Electric Co. Llc Flexible penetration attachment for strainers
US6488842B2 (en) * 1999-02-26 2002-12-03 Tadayoshi Nagaoka Filtering device
US6690758B1 (en) * 2000-08-01 2004-02-10 Global Nuclear Fuel -- Americas, Llc Perforated debris catcher for a nuclear fuel assembly
US6709586B2 (en) * 2002-03-04 2004-03-23 Studsvik, Inc. Dewatering method and device
US20040206679A1 (en) * 2002-11-25 2004-10-21 Bleigh James M Strainer assembly
US20040206682A1 (en) * 2003-04-18 2004-10-21 Thomas Hamlin Filter assembly utilizing carbon block and pleated filter element
US6876713B2 (en) * 2001-03-20 2005-04-05 Westinghouse Atom Ab Filter and fuel assembly for a light-water nuclear reactor
US6901128B2 (en) * 2001-08-15 2005-05-31 Mitsubishi Heavy Industries, Ltd. Foreign matter filter for fuel assembly in pressurized water reactor
US20050167355A1 (en) * 2004-01-29 2005-08-04 Cci Ag Strainer wall for the screening off of a suction space
US20060027492A1 (en) * 2004-08-06 2006-02-09 Lin Mao C Filter mechanism
US20060049096A1 (en) * 2002-04-19 2006-03-09 Bassett Laurence W Encapsulated filter cartridge
US20060219645A1 (en) * 2003-05-15 2006-10-05 Continuum Dynamics, Inc. Self-cleaning strainer
US7149272B2 (en) * 2001-01-22 2006-12-12 Westinghouse Electric Ab Sweden Filter for cooling water in a light water cooled nuclear reactor
US20070045166A1 (en) * 2005-08-26 2007-03-01 General Electric Company Compliant connector for ECCS strainer modules
US20070289915A1 (en) * 2006-06-20 2007-12-20 Cummins Filtration Ip, Inc. Replaceable filter elements including plural filter media and related filtration systems, techniques and methods
US20100025315A1 (en) * 2005-10-05 2010-02-04 James Aaron Smith Filter medium for strainers used in nuclear reactor emergency core cooling systems

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925650A (en) * 1956-01-30 1960-02-23 Pall Corp Method of forming perforate metal sheets
US3049796A (en) * 1957-07-12 1962-08-21 Pall Corp Perforate metal sheets
BE632088A (en) * 1962-05-09
US3329276A (en) * 1966-08-10 1967-07-04 Purolator Products Inc Fluid filter elements
US3690606A (en) * 1968-05-27 1972-09-12 Pall Corp Anisometric compressed and bonded multilayer knitted wire mesh composites
US3780872A (en) * 1968-05-27 1973-12-25 Pall Corp Filters comprising anisometric compressed and bonded multilayer knitted wire mesh composites
US3458047A (en) * 1968-08-18 1969-07-29 Eugene B White Filter cell
US3669879A (en) * 1969-12-15 1972-06-13 Dresser Ind Fluid separation apparatus and method
US3708965A (en) * 1970-09-08 1973-01-09 K Domnick Gas filters
DE3113624A1 (en) * 1980-04-22 1982-04-08 British Sidac Ltd., Watford, Hertfordshire "RINSABLE FILTRATION DEVICE"
US4744806A (en) * 1987-01-30 1988-05-17 Koch Engineering Company, Inc. Variegated density mesh pad for mist removal and method of preparing same
US5664628A (en) * 1993-05-25 1997-09-09 Pall Corporation Filter for subterranean wells
US5711872A (en) * 1994-06-15 1998-01-27 Jones; John A. Reusable oil filter assembly
CA2187963C (en) * 1995-11-03 2001-04-10 Stephen Proulx Filter cartridge construction and process for filtering particle-containing paint compositions
US5873999A (en) * 1997-08-29 1999-02-23 Sefar America Inc. Sieving and filtration screen
TW457114B (en) * 1998-05-06 2001-10-01 Pti Technologies Inc Metallic fluid filter and method of making the same
US6457588B1 (en) * 1999-11-03 2002-10-01 Varco I/P, Inc. Treatment of fluid having lost circulation material
US6237780B1 (en) * 1999-11-03 2001-05-29 Tuboscope I/P, Inc. Vibratory separator screens
US20050284823A1 (en) * 2004-06-23 2005-12-29 Fall Ronald E Cooking oil filter element and method

Patent Citations (89)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1140726A (en) * 1914-01-05 1915-05-25 William F Warden Filter.
US2442818A (en) * 1945-11-26 1948-06-08 William E Lyman Strainer
US3929567A (en) * 1972-04-11 1975-12-30 Siemens Ag Nuclear reactor equipped with a flooding tank and a residual heat removal and emergency cooling system
US4138319A (en) * 1975-12-02 1979-02-06 Kraftwerk Union Aktiengesellschaft Nuclear reactor installation with a light-water reactor
US4225328A (en) * 1977-11-17 1980-09-30 Delbag-Luftfilter Gmbh Exchangeable filter element
US4376091A (en) * 1979-04-02 1983-03-08 Zurn Industries, Inc. Mechanical strainer unit
US4597871A (en) * 1979-05-25 1986-07-01 Hitachi, Ltd. Apparatus for removing foreign matters
US4331460A (en) * 1979-08-04 1982-05-25 Kernforschungszentrum Karlsruhe Gmbh Mist collector for separating drops of liquid from streams of gas for vapor
US4280906A (en) * 1979-11-21 1981-07-28 Ab Asea-Atom Filter for separating solid contaminants from a fluid, especially solid contaminants in a reactor cooling water used in nuclear reactor plants
US4446099A (en) * 1980-07-31 1984-05-01 Framatome Device for protecting control cluster actuating mechanisms during the testing of a nuclear reactor
US4655995A (en) * 1984-05-11 1987-04-07 Westinghouse Electric Corp. Reversible BWR fuel assembly and method of using same
US4610838A (en) * 1984-07-26 1986-09-09 Westinghouse Electric Corp. Method for removing debris from a nuclear reactor vessel
US4684495A (en) * 1984-11-16 1987-08-04 Westinghouse Electric Corp. Fuel assembly bottom nozzle with integral debris trap
US4684496A (en) * 1984-11-16 1987-08-04 Westinghouse Electric Corp. Debris trap for a pressurized water nuclear reactor
US4664880A (en) * 1984-12-07 1987-05-12 Westinghouse Electric Corp. Wire mesh debris trap for a fuel assembly
US4772447A (en) * 1985-02-08 1988-09-20 Commissariat A L'energie Atomique Device for the spacing and holding in place of fuel rods in a fuel assembly
US4678627A (en) * 1985-04-04 1987-07-07 Westinghouse Electric Corp. Debris-retaining trap for a fuel assembly
US4652425A (en) * 1985-08-08 1987-03-24 Westinghouse Electric Corp. Bottom grid mounted debris trap for a fuel assembly
US4753771A (en) * 1986-02-07 1988-06-28 Westinghouse Electric Corp. Passive safety system for a pressurized water nuclear reactor
US4849161A (en) * 1987-02-19 1989-07-18 Advanced Nuclear Fuels Corp. Debris-resistant fuel assembly
US4909937A (en) * 1987-02-20 1990-03-20 Sartorius Gmbh Integral filters for separating fluid components and housing for them
US4781884A (en) * 1987-03-02 1988-11-01 Combustion Engineering, Inc. Debris catching strainer grid
US4900507A (en) * 1987-05-05 1990-02-13 Westinghouse Electric Corp. Nuclear fuel assembly debris filter bottom nozzle
US4828791A (en) * 1987-10-05 1989-05-09 Westinghouse Electric Corp. Nuclear fuel assembly debris resistant bottom nozzle
US4832905A (en) * 1988-04-15 1989-05-23 Combustion Engineering, Inc. Lower end fitting debris collector
US4919883A (en) * 1988-12-14 1990-04-24 Combustion Engineering, Inc. Lower end fitting debris collector and end cap spacer grid
US5024806A (en) * 1989-09-21 1991-06-18 Westinghouse Electric Corp. Enhanced debris filter bottom nozzle for a nuclear fuel assembly
US5100611A (en) * 1989-12-15 1992-03-31 Abb Atom Ab Fuel assembly for a light-wafer nuclear reactor
US5030412A (en) * 1990-05-04 1991-07-09 Advanced Nuclear Fuels Corporation Fuel assembly debris screen
US5154197A (en) * 1990-05-18 1992-10-13 Westinghouse Electric Corp. Chemical cleaning method for steam generators utilizing pressure pulsing
US5053122A (en) * 1990-09-13 1991-10-01 Micron Technology, Inc. Oil filtration and exhaust apparatus
US5225152A (en) * 1990-11-20 1993-07-06 Framatome Filtering bottom nozzle for a fuel assembly of a lightwater-cooled reactor
US5271051A (en) * 1992-06-24 1993-12-14 Westinghouse Electric Corp. Combined cooling and purification system for nuclear reactor spent fuel pit, refueling cavity, and refueling water storage tank
US5867550A (en) * 1992-12-02 1999-02-02 Siemens Aktiengesellschaft Process for the production of a screen plate for a fuel assembly foot and corresponding fuel assembly
US5453180A (en) * 1992-12-04 1995-09-26 Vattenfall Utveckling Ab Strainer for filtering water to an emergency cooling system in a nuclear power plant
US5612983A (en) * 1992-12-04 1997-03-18 Vattenfall Utveckling Ab Device for filtering water to an emergency cooling system in a nuclear power plant
US5483564A (en) * 1993-04-12 1996-01-09 General Electric Company Lower tie plate strainers including double corrugated strainers for boiling water reactors
US5390221A (en) * 1993-08-23 1995-02-14 General Electric Company Debris filters with flow bypass for boiling water reactors
US5390220A (en) * 1993-11-29 1995-02-14 General Electric Company Lower tie plate strainers including helical spring strainers for boiling water reactors
US5345483A (en) * 1993-12-02 1994-09-06 General Electric Company Lower tie plate strainers having double plate with offset holes for boiling water reactors
US5361287A (en) * 1994-03-29 1994-11-01 B&W Fuel Company Nuclear fuel assembly lower end fitting
US5426679A (en) * 1994-04-20 1995-06-20 Vattenfall Utveckling Ab Strainer device for filtering water to an emergency cooling system in a nuclear power plant
US5496468A (en) * 1994-04-26 1996-03-05 Cormier; Reginald Waste water management system with an auxiliary reservoir
US5539790A (en) * 1994-05-20 1996-07-23 Vattenfall Utveckling Ab Strainer device for filtering water to an emergency cooling system in a nuclear power plant
US5524031A (en) * 1994-06-30 1996-06-04 Siemens Power Corporation Attachable debris filter for BWR nuclear fuel assemblies
US5481577A (en) * 1994-06-30 1996-01-02 Siemens Power Corporation Boiling water reactor fuel assembly filter
US5478469A (en) * 1994-08-08 1995-12-26 B & W Nuclear Technologies Filter assembly for cooling water in a nuclear reactor
US5528640A (en) * 1994-11-07 1996-06-18 General Electric Company Low pressure double offset plate catcher for a nuclear reactor
US5604777A (en) * 1995-03-13 1997-02-18 Westinghouse Electric Corporation Nuclear reactor coolant pump
US5969801A (en) * 1995-03-13 1999-10-19 Sony Corporation Correction method and correction apparatus of mask pattern
US5640434A (en) * 1995-07-31 1997-06-17 Rottenberg; Sigmunt Miniaturized nuclear reactor utilizing improved pressure tube structural members
US20020148766A1 (en) * 1995-08-24 2002-10-17 Dwyer Paul M. Suction strainer with an internal core tube
US6491818B2 (en) * 1995-08-24 2002-12-10 Performance Contracting, Inc. Suction strainer with an internal core tube
US5696801A (en) * 1995-08-24 1997-12-09 Performance Contracting, Inc. Suction strainer with a internal core tube
US5958234A (en) * 1995-08-24 1999-09-28 Performance Contracting, Inc. Suction strainer with an internal core tube
US5843314A (en) * 1995-08-24 1998-12-01 Performance Contracting, Inc. Suction strainer with an internal core tube
US5688402A (en) * 1995-12-15 1997-11-18 General Electric Company Self-cleaning strainer
US5748694A (en) * 1996-03-26 1998-05-05 General Electric Company Fuel bundle filter for a nuclear reactor fuel bundle assembly
US5759398A (en) * 1996-07-12 1998-06-02 Sulzer Thermtec Ag Screen for inlet opening of a pump
US5705054A (en) * 1996-08-08 1998-01-06 Imatran Voima Oy Filtering system
US5828714A (en) * 1996-12-19 1998-10-27 Westinghouse Electric Corporation Enhanced passive safety system for a nuclear pressurized water reactor
US5759399A (en) * 1997-01-08 1998-06-02 Continuum Dynamics, Inc. High capacity, low head loss, suction strainer for nuclear reactors
US5935439A (en) * 1997-02-19 1999-08-10 Performance Contracting, Inc. Suction system with end supported internal core tube suction strainers
US5815544A (en) * 1997-02-20 1998-09-29 Lefter; Jan D. Self-cleaning strainer
US5835549A (en) * 1997-03-06 1998-11-10 Combustion Engineering, Inc. BWR emergency core cooling system strainer
US6477220B1 (en) * 1998-02-10 2002-11-05 Westinghouse Electric Co. Llc Flexible penetration attachment for strainers
US6106592A (en) * 1998-03-17 2000-08-22 Monsanto Company Wet electrostatic filtration process and apparatus for cleaning a gas stream
US6387261B1 (en) * 1998-09-15 2002-05-14 Gregory Mojena Serviceable filter with bypass
US6488842B2 (en) * 1999-02-26 2002-12-03 Tadayoshi Nagaoka Filtering device
US6254774B1 (en) * 1999-10-25 2001-07-03 James R. Henderson Apparatus for radioactive particulate filtration
US20020057755A1 (en) * 2000-03-31 2002-05-16 Yukio Hemmi Nuclear power plant system and method of operating the same
US7027549B2 (en) * 2000-03-31 2006-04-11 Kabushiki Kaisha Toshiba Nuclear power plant system and method of operating the same
US6690758B1 (en) * 2000-08-01 2004-02-10 Global Nuclear Fuel -- Americas, Llc Perforated debris catcher for a nuclear fuel assembly
US20020020678A1 (en) * 2000-08-21 2002-02-21 Loreno Terry Ross Method and apparatus for draining a barge or other like container
US7149272B2 (en) * 2001-01-22 2006-12-12 Westinghouse Electric Ab Sweden Filter for cooling water in a light water cooled nuclear reactor
US6876713B2 (en) * 2001-03-20 2005-04-05 Westinghouse Atom Ab Filter and fuel assembly for a light-water nuclear reactor
US6901128B2 (en) * 2001-08-15 2005-05-31 Mitsubishi Heavy Industries, Ltd. Foreign matter filter for fuel assembly in pressurized water reactor
US6709586B2 (en) * 2002-03-04 2004-03-23 Studsvik, Inc. Dewatering method and device
US7081201B2 (en) * 2002-04-19 2006-07-25 3M Innovative Properties Company Encapsulated filter cartridge
US20060049096A1 (en) * 2002-04-19 2006-03-09 Bassett Laurence W Encapsulated filter cartridge
US20040206679A1 (en) * 2002-11-25 2004-10-21 Bleigh James M Strainer assembly
US20040206682A1 (en) * 2003-04-18 2004-10-21 Thomas Hamlin Filter assembly utilizing carbon block and pleated filter element
US20060219645A1 (en) * 2003-05-15 2006-10-05 Continuum Dynamics, Inc. Self-cleaning strainer
US20050167355A1 (en) * 2004-01-29 2005-08-04 Cci Ag Strainer wall for the screening off of a suction space
US7211190B2 (en) * 2004-01-29 2007-05-01 Cci Ag Strainer wall for the screening off of a suction space
US20060027492A1 (en) * 2004-08-06 2006-02-09 Lin Mao C Filter mechanism
US20070045166A1 (en) * 2005-08-26 2007-03-01 General Electric Company Compliant connector for ECCS strainer modules
US20100025315A1 (en) * 2005-10-05 2010-02-04 James Aaron Smith Filter medium for strainers used in nuclear reactor emergency core cooling systems
US20070289915A1 (en) * 2006-06-20 2007-12-20 Cummins Filtration Ip, Inc. Replaceable filter elements including plural filter media and related filtration systems, techniques and methods

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060219645A1 (en) * 2003-05-15 2006-10-05 Continuum Dynamics, Inc. Self-cleaning strainer
US20110215059A1 (en) * 2005-10-05 2011-09-08 James Aaron Smith Filter medium for strainers used in nuclear reactor emergency core cooling systems
US20100025315A1 (en) * 2005-10-05 2010-02-04 James Aaron Smith Filter medium for strainers used in nuclear reactor emergency core cooling systems
US8054932B2 (en) * 2005-10-05 2011-11-08 Enercon Services, Inc. Filter medium for strainers used in nuclear reactor emergency core cooling systems
US8048319B2 (en) * 2005-10-05 2011-11-01 Enercon Services, Inc. Filter medium for strainers used in nuclear reactor emergency core cooling systems
US20070138072A1 (en) * 2005-11-02 2007-06-21 Continuum Dynamics, Inc. Trash rack for nuclear power plant
US20090166284A1 (en) * 2006-07-28 2009-07-02 Dieter Theis Filter System
US20090184064A1 (en) * 2008-01-23 2009-07-23 Sohail Zaiter Scalable immersed-filtration method and apparatus
EP2488270A4 (en) * 2009-10-13 2013-05-01 Control Components Increased efficiency strainer system
KR101730678B1 (en) 2009-10-13 2017-04-27 콘트롤 컴퍼넌츠 아이엔씨 Increased efficiency strainer system
US20110084009A1 (en) * 2009-10-13 2011-04-14 Stanislaw Kielbowicz Increased efficiency strainer system
US20110084008A1 (en) * 2009-10-13 2011-04-14 Stanislaw Kielbowicz Increased efficiency strainer system
US9233324B2 (en) 2009-10-13 2016-01-12 Control Components, Inc. Increased efficiency strainer system
US9266045B2 (en) 2009-10-13 2016-02-23 Control Components, Inc. Increased efficiency strainer system
EP2488270A1 (en) * 2009-10-13 2012-08-22 Control Components, Inc. Increased efficiency strainer system
WO2011046753A1 (en) * 2009-10-13 2011-04-21 Control Components, Inc. Increased efficiency strainer system
US20110297627A1 (en) * 2010-06-07 2011-12-08 Bhi Co., Ltd. Strainer wall structure, filtration method using the same, and method of fabricating the same
US8475659B2 (en) * 2010-06-07 2013-07-02 Korea Hydro & Nuclear Power Co., Ltd. Strainers for emergency core cooling systems—ECCS
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
US8663469B2 (en) * 2010-08-12 2014-03-04 Korea Hydro & Nuclear Power Co., Ltd. Strainer wall structure including curved sections
US20120037572A1 (en) * 2010-08-12 2012-02-16 Bhi Co., Ltd. Strainer wall structure including curved sections, method of manufacturing the same, and filtering method using the same
US9741458B2 (en) 2011-04-21 2017-08-22 Performance Contracting, Inc. Multimodal debris trap
EA025156B1 (en) * 2011-06-01 2016-11-30 Транско Продактс Инк. High capacity suction strainer for an emergency core cooling system in a nuclear power plant
US8877054B2 (en) 2011-06-01 2014-11-04 Transco Products Inc. High capacity suction strainer for an emergency core cooling system in a nuclear power plant
KR20140057211A (en) * 2011-06-01 2014-05-12 트랜스코 프로덕츠 인코포레이티드 High capacity suction strainer for an emergency core cooling system in a nuclear power plant
WO2012166307A1 (en) * 2011-06-01 2012-12-06 Transco Products Inc. High capacity suction strainer for an emergency core cooling system in a nuclear power plant
US9997264B2 (en) 2012-02-14 2018-06-12 Control Components, Inc. Enhanced nuclear sump strainer system
US8771509B2 (en) * 2012-04-03 2014-07-08 Institute Of Nuclear Energy Research Purifying device for sludge under water and method for operating the same
US20130256236A1 (en) * 2012-04-03 2013-10-03 Chun-Ping Huang Purifying device for sludge under water and methof for operating the same
US20140246365A1 (en) * 2013-03-01 2014-09-04 Graver Technologies, Llc "underdrain filter for power generation and liquid process filtration vessels and method of using the same"
US9715947B2 (en) 2013-08-09 2017-07-25 Ge-Hitachi Nuclear Energy Americas Llc Systems for debris mitigation in nuclear reactor safety systems
CN105169786A (en) * 2015-09-10 2015-12-23 中科华核电技术研究院有限公司 Recirculation filter of nuclear island containment
US11428219B2 (en) * 2019-04-12 2022-08-30 Cameron Farms Hutterite Colony Liquid intake filters
US20220088527A1 (en) * 2020-09-18 2022-03-24 Pall Corporation Branched filter and method of use

Also Published As

Publication number Publication date
WO2007044127A3 (en) 2008-04-10
US8048319B2 (en) 2011-11-01
US20100025315A1 (en) 2010-02-04
KR20080059631A (en) 2008-06-30
CN101321569A (en) 2008-12-10
WO2007044127A2 (en) 2007-04-19

Similar Documents

Publication Publication Date Title
US20070084782A1 (en) Filter medium for strainers used in nuclear reactor emergency core cooling systems
US8054932B2 (en) Filter medium for strainers used in nuclear reactor emergency core cooling systems
KR101025706B1 (en) Strainer filtering apparatus including filtered tube
CA3068570C (en) Active pit tank strainer of a nuclear power plant
US5705054A (en) Filtering system
JP6469198B1 (en) Filtration device
US20140246365A1 (en) "underdrain filter for power generation and liquid process filtration vessels and method of using the same"
US20230271114A1 (en) Method and apparatus for filtering fluid in nuclear power generation
KR100792590B1 (en) Filtering system
CN211585391U (en) Built-in reloading water tank filter screen equipment of nuclear power station
CN207996479U (en) A kind of self-leak type sewage differentiator
US6959817B2 (en) Cooling makeup water intake cartridge filter for industry
CN208885692U (en) The coarse-fine integrated filter of hydraulic station
JP2015036687A (en) System for debris mitigation in nuclear reactor safety system
KR20220056157A (en) Self-cleaning liquid cleaning system
CN218686756U (en) Filter and have its underwater equipment
CN210944938U (en) Emergency pipeline system for discharging sewage into sea
CN113299412B (en) Compromise emergent reactor core cooling system filter of filtering and drainage function
CN217961538U (en) Buffer safety filter
CN212974364U (en) Full-automatic back-flushing water filter
CN207384995U (en) A kind of efficient water circulation system of chemical process
CN215782105U (en) Water supply pipeline scrubbing device
CN210674453U (en) Box-type filter element structure of special safety system for nuclear power station
KR101104421B1 (en) Fibroid Membrane Filter
US20130087494A1 (en) Fluid filtering apparatus and method of making same

Legal Events

Date Code Title Description
AS Assignment

Owner name: ENERCON SERVICES, INC., OKLAHOMA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SMITH, JAMES AARON;PATEL, ATUL HARIHAR;CARR, LOUIS THOMAS JR.;REEL/FRAME:017069/0357

Effective date: 20050928

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION