CN101321569A - 用于用在核反应堆应急堆芯冷却系统中的粗滤器的过滤介质 - Google Patents
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Abstract
一种用于核电站ECCS应急储槽(12)之中的各粗滤器(10)的过滤介质(100)。过滤介质(100)与双壁、同心管状各过滤模块(16)一起使用。过滤介质(100)优选由编结或编织的不锈钢丝材料制成并状为圆筒这样它可以以此方式被嵌装在双壁、同心管状粗滤器(16)的外部(28)与内部(30)粗滤器之间,其中所述方式是指在把所述水泵送至反应堆芯(14)之前使流过粗滤器(16)的水必须流过过滤介质(100)并被其过滤。过滤介质(100)穿过滤模块(16)的底部(24)被插入并被X形的卡持器(106)固定就位。
Description
技术领域
本发明涉及一种与用在核电站的应急堆芯冷却系统(ECCS)中的同心管状粗滤器结合使用的过滤介质。具体地说,本发明涉及一种编织或编结的不锈钢过滤介质,该过滤介质被嵌装在外部与内部双壁同心管式粗滤器之间,水在流过所述粗滤器之后以及被泵送到所述反应堆芯之前必须流经所述过滤介质并被过滤。
背景技术
容放储槽,也称作应急或再循环储槽,是核电站的应急堆芯冷却系统或ECCS的一部分。ECCS是在美国建造的每一座核电站中为核管理委员会或NRC所要求的若干安全系统之一。对ECCS提出要求是为了消除设计基本事故。
容放储槽在冷却剂漏失事故或LOCA之后收集反应堆冷却剂和化学反应喷洒液。容放储槽用作水源以支持相应于余热排除、应急堆芯冷却和防护大气净化等功能的长期再循环。因而此水源和相关设备是核电站重要的安全组成部分。
一般地,所述容放储槽由碎屑粗滤器围绕以防止碎屑进入ECCS吸入管线。所述粗滤器由多个多孔过滤模块组成,多孔过滤模块用于在应急堆芯冷却事件期间从进入核电站容放储槽的再循环水中过滤和滤除纤维状碎屑和颗粒碎屑以及其他物质。重要的是在水流进ECCS的泵机之前从所述水中滤除这种碎屑。碎屑会阻住或限制经由粗滤器上的孔口的流动,或者,如果允许碎屑流过所述粗滤器并进入ECCS的泵机,可能损坏ECCS泵机以及由ECCS泵机所服务的系统中的各组成部分诸如反应堆。
本发明减少或消除了可能流过用在核电站容放储槽中的粗滤器的碎屑和其他物质。对于典型的粗滤器来说,可能旁通过或通过应急粗滤器孔口的碎屑数量一般处于沉积在所述粗滤器表面上的全部碎屑和物质的百分之五或以上的量级上。这样,相当数量的碎屑一般会流过所述粗滤器。流过所述粗滤器的碎屑和物质量已经被证明对粗滤器下游的设备和各组成部分具有一些不良影响。这方面可能包括过度磨损、塞堵、阻碍、淤阻,等等。这可导致设备失效、设备寿命降低、反应堆燃料冷却路径阻塞,等等。因此,本发明的目的是要减少或消除碎屑和物质的旁通以减少或消除对下游设备和各组成部分的不良影响。
核动力工业一直没有与可能会被堵塞的粗滤器结合使用任何类型的过滤介质,因为这会导致压头损失,造成会导致气穴的泵机抽吸损失,以及从而阻止冷却水流流向反应堆。因而,把过滤介质添加使用到粗滤器有悖于产业中的现行实践。
本发明包括主粗滤装置,它一般由多孔不锈钢制成,耦联于不锈钢编织或编结丝网的定制设计的过滤介质嵌装件。所附各图图示了一种特定的多孔粗滤器设计并利用圆筒形编结丝网形过滤介质作为二次过滤器。不过,所述过滤介质可以制成各种形状和结构,以便与不同的各种粗滤器结构一起使用。
编织或编结丝网过滤介质通过采用各种直径、密度、卷缩形式和结构来予以定制的,以便针对每一具体应用优化旁通的碎屑和其他物质的减少。编织或编结丝网位于主粗滤器的内部或下游侧,并因此用作二次过滤介质,而粗滤器充任主过滤功能。主粗滤器的碎屑过滤作用与二次过滤器相结合而形成一个系统,该系统大大地减少了在ECCS再循环作业期间可能遭遇的旁通碎屑和其他物质,并在取得此种效果的同时不显著地增大横跨粗滤器和过滤器组合的流体压力降。
本发明的粗滤器和过滤器组合体可产生减少或消除碎屑和其他物质的旁通的两个物理因素。第一个是旁通阻力而第二个是碎屑或其他物质在过滤介质上的俘获。
旁通阻力是对于碎屑和其他物质流过主粗滤器孔口的物理阻力。与粗滤器结合使用编织或编结的丝网二次过滤介质导致增大与主粗滤器相关联的旁通阻力。这种旁通阻力因素趋向于造成本来回流过主粗滤器的相当大一部分碎屑和其他物质保留在所述主粗滤器的上游表面上。
对于设法流过主粗滤器孔口的碎屑和其他物质来说,编织或编结的丝网二次过滤介质将余留碎屑和其他物质的大部分,如果不是全部的话,俘获在卷绕起来的丝网结构之内,并因而防止其进入流向ECCS泵机的冷却水的下游水流。
本发明设计成用作一种完全无源装置,除了大约每18至24月一次的定期检查外,不需要电力、定期更换或人为的干预与或操作。把不锈钢材用于过滤介质将确保本发明具有长期功能性,将不会受腐蚀条件的影响,并且在LOCA之后能够保持浸渍在预期的容放水条件下。
发明内容
本发明是一种用于在核电站应急堆芯冷却系统中所使用的粗滤器的过滤介质。此过滤介质结合双壁、同心管式过粗滤器滤模块一起使用。所述过滤介质优选地用编结或编织的不锈钢丝材料制成并呈圆筒状,使得它可以以这样一种方式被嵌装在双壁、同心管式粗滤器的外部与内部粗滤器之间,使得流过所述粗滤器的水必须流过所述过滤介质并被其过滤,而后所述水可以被泵送到反应堆芯。
圆筒形过滤介质一般用X状卡持器固定就位在每一双壁同心管式粗滤器的外部与内部粗滤器之间。
附图说明
图1是表示用在核电站ECCS储槽中的同心管式粗滤器的现有关系的简图;
图2是沿着图1直线2-2截取的若干现有同心管式粗滤器的横截面视图;
图3是位于图2的圆圈3之内的同心管式粗滤器的放大视图,表示流过粗滤器的水的流型;
图4是同心管式粗滤器的底视透视图,具有根据本发明的、从所述粗滤器的底部被插入粗滤器中的过滤器,为了清晰起见挡持装置从所述粗滤器被去除;
图5是具有根据本发明的优选实施例构成的过滤器的同心管式粗滤器的顶视透视图;
图6是示于图5中的具有过滤器的同心管式粗滤器的底部透视图;
图7是类似于图2的横截面视图,表示如当它们被安装在储槽中时将呈现的具有过滤器的同心管式粗滤器;
图8是位于图7的圆圈8中的具有过滤器的同心管式粗滤器的放大视图,挡持装置被去除并表示穿过具有过滤器的粗滤器的水的流型;
图9是沿着图6的直线9-9截取的具有过滤器的粗滤器的底部平面视图,表示用于将所述过滤器固定在粗滤器内的卡持装置。
具体实施方式
现在参照附图并首先参照图1、2和3,其中图示了同心管式过滤器10于与核电站的反应堆芯14相关联的应急容放储槽12中的现有装设。如图1所示,储槽12是用于核电站的应急堆芯冷却系统或ECCS的一部分。ECCS用以在冷却剂漏失事故或LOCA之后于储槽12之中收集化学反应喷洒液和通常为水的反应堆冷却剂。ECCS还用以从所述水中滤出大的碎屑并将过滤后的水再循环到反应堆芯14以防止堆芯14过热。
如图1所示以及图2和3之中较为详细地所示,粗滤器10设置有多个同心管式过滤模块16,过滤模块16于储槽12中位于水位18以下。每一过滤模块16经由其底部凸缘20装接于填充箱22,使得过滤模块16的底部或下游侧24与填充箱22的内部空腔26流体连通,如以后将予以更充分地描述那样。每一同心管式过滤模块16设置有两个过滤壁:外部圆筒形过滤壁28和内部圆筒形过滤壁30。外部和内部壁28和30被间隔开,使得圆筒形内部空间32在每一模块16的壁28和30下游侧于每一模块16内形成在双壁28与30之间。外部和内部过滤壁28和30二者都优选由多孔不锈钢圆筒制成。如图3所示,设置在壁28和30上的穿孔34处在直径1/16至1/4英寸的尺寸范围内。每一模块16的外部粗滤器28的下边缘36在设置在凸缘20上的圆形孔口38处被装接于底部凸缘20,而外部粗滤器28的上边缘40被装接于顶部密封环42。内部粗滤器30的上边缘44也被装接于顶部密封环42,而内部粗滤器30的下边缘46被装接在圆形底板50的周边48处。
圆形底板50和底部凸缘20位于大致同一平面上。圆形底板50位于设置在底部凸缘20上的圆形孔口38之内并与底部凸缘20间隔开,使得圆筒形内部空间32接续于模块16的底部24。如图3所示,每一模块16的底部凸缘20通过螺栓54在相关联的填充箱孔口52处装接于填充箱22,所述螺栓54延伸穿过分别设置在底部凸缘20和填充箱22上的螺栓孔口56和58。当模块16这样被装接于填充箱22时,模块16的圆筒形内部空间32流体连通于填充箱22的内部空腔26。因而,当同心管式粗滤器10组装起来时,位于储槽12之中的水必须流经多孔过滤壁28或30之一并由多孔过滤壁28或30之一过滤,以便进入填充箱22。
如图3中的描述水通过模块16的流路的箭头所示,来自储槽12的水在每一过滤模块16周围流动并穿过外部或内部的多孔圆筒形壁28或30而进入形成在两个壁28与30之间的圆筒形内部空间32。经过过滤的水然后在模块16的底部24处流出圆筒形内部空间32并流入与圆筒形内部空间32连通的填充箱22的内部空腔26。
由此,如图1所示,所述水然后经由吸水管线60流入将水经由排水管线66送至反应堆芯14的应急堆芯冷却系统或ECCS的泵机62。
图4、5、6、7、8和9图示一种与用在核电站的ECCS之中的粗滤器10结合使用的过滤介质100。过滤介质100是按照本发明的优选实施例制成的。过滤介质100优选地由已经成形为圆筒的编织或编结的不锈钢丝网制成,使得它可以被插入设置在过滤模块16的两壁28与30之间的内部空间32并完全填充内部空间32。过滤介质100被嵌装在内部空间32之中的方式是,流过过滤模块16的壁28和30的水在其可以被泵送至反应堆芯14之前必须也流过过滤介质100并被其过滤。
图4图示过滤介质100经由设置在模块16底部24处的环状孔口68被插入过滤模块16的内部空间32。所述环状孔口位于底部凸缘20上的孔口38与圆形底板50之间,并且处于模块16的内部空间32接合于填充箱22的内部空腔26的位置。
如图3、5或6所示,一旦过滤介质100已经完全插入过滤模块16,过滤介质100的顶部102贴靠顶部密封环42而过滤介质100的底部104大致上齐平于过滤模块16的底部24。如图9所示,X状的挡持装置106被设置成装接于过滤模块16并用于将过滤介质100固定在过滤模块16中。
如图7和8所示,流过本发明粗滤器10和过滤器100的水的流型与示于图2和3中的现有粗滤器10的水的流型没有什么不同,例外的是在本发明中,所述水在进入填充箱22之前流过位于过滤模块16的内部空间32之内的过滤介质100。添加过滤介质100于现有的过滤模块16对于将水送至ECCS泵机62的吸水管线60中的压头并无不利影响。
虽然已经在一定程度的特殊性上描述了本发明,但显然的是,在不偏离所披露内容的精神和范围内可在结构细节和各组成部分的排列上作出许多变更。可以理解,本发明不限于在此为了例证而阐述的各项实施例,而是要只受所附一项或多项权利要求范围的限制,其中所述范围包括与其每一要素被授权等同的全部范围。
Claims (7)
1.一种用于用在核电站ECCS中的粗滤器的过滤介质,包括:
过滤介质,该过滤介质固装于用于核反应堆的ECCS的水流路径中的粗滤器的紧下游并设置于ECCS泵机的水流路径的上游,使得已经流过所述粗滤器的水在它能够抵达ECCS泵机之前必须首先经过过滤介质,以及
所述过滤介质由不锈钢丝材料构作而成。
2.按照权利要求1所述的用于核电站ECCS中的粗滤器的过滤介质,还包括:
所述过滤介质成型为空心圆筒形状,使得所述圆筒形过滤介质可以被插进设置在所述粗滤器上的每一双壁过滤模块下游侧上形成的空间中。
3.按照权利要求2所述的用于核电站ECCS中的粗滤器的过滤介质,还包括:
关联于每一圆筒形过滤介质的挡持装置,用于将圆筒形过滤介质固定于与其相关联的过滤模块之中。
4.按照权利要求1所述的用于核电站ECCS中的粗滤器的过滤介质,其中,所述过滤介质由编织不锈钢丝或编结不锈钢丝制成。
5.一种用于核电站ECCS中的过滤介质与粗滤器组合体,包括:
设置在核反应堆的应急储槽中的粗滤器,所述粗滤器设置有多个过滤模块,每一过滤模块固定于填充箱,所述填充箱经由吸水管线连通于ECCS泵机将水供至反应堆芯,每一过滤模块设置有间隔开的双壁,所述双壁在双壁的下游侧形成圆筒形内部空间,以及
圆筒形过滤介质,该圆筒形过滤介质固在在双壁之间,使得所述过滤介质位于所述圆筒形内部空间中。
6.按照权利要求5所述的用于核电站ECCS中的过滤介质与粗滤器组合体,还包括:
所述圆筒形过滤介质由挡持装置固定在其相关联的过滤模块的双壁之间,以及所述挡持装置以这样一种方式固定于所述过滤模块的底部,以便可拆卸地阻止圆筒形过滤介质相对于其相关联的过滤模块的插入或取出。
7.一种通过过滤介质与粗滤器的组合体过滤盛放在用于核反应堆的ECCS的容放储槽中的水的方法,包括:
利用ECCS中的多孔粗滤器过滤来自容放储槽的水,以从所述水中去除较大的碎屑颗粒和其他物质,
利用由编织或编结不锈钢丝材料制成的过滤介质过滤已经流过多孔粗滤器的被过滤的水,以从被过滤的水中去除大部分残留的碎屑和其他物质,以及
利用ECCS泵机将已经流过所述过滤介质的经过粗滤和过滤的水泵送到反应堆芯。
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| Application Number | Priority Date | Filing Date | Title |
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| US11/243,637 US20070084782A1 (en) | 2005-10-05 | 2005-10-05 | Filter medium for strainers used in nuclear reactor emergency core cooling systems |
| US11/243,637 | 2005-10-05 |
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| US (2) | US20070084782A1 (zh) |
| KR (1) | KR20080059631A (zh) |
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- 2005-10-05 US US11/243,637 patent/US20070084782A1/en not_active Abandoned
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2006
- 2006-08-24 KR KR1020087010893A patent/KR20080059631A/ko not_active Withdrawn
- 2006-08-24 CN CNA2006800450312A patent/CN101321569A/zh active Pending
- 2006-08-24 WO PCT/US2006/032449 patent/WO2007044127A2/en not_active Ceased
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2009
- 2009-09-28 US US12/568,327 patent/US8048319B2/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102639202A (zh) * | 2009-10-13 | 2012-08-15 | 控制元器件公司 | 提高效率的滤网系统 |
| CN102639202B (zh) * | 2009-10-13 | 2014-09-03 | 控制元器件公司 | 提高效率的滤网系统 |
| CN102142286A (zh) * | 2010-01-28 | 2011-08-03 | 贝尔坦技术有限公司 | 用于核反应堆的喷洒和安全注射回路的过滤板 |
| CN102142286B (zh) * | 2010-01-28 | 2015-08-12 | 贝尔坦技术有限公司 | 用于核反应堆的喷洒和安全注射回路的过滤板 |
| CN103687656A (zh) * | 2011-06-01 | 2014-03-26 | 特兰斯科产品股份有限公司 | 用于核电站中的应急堆芯冷却系统的大容量吸滤器 |
| CN103687656B (zh) * | 2011-06-01 | 2016-03-02 | 特兰斯科产品股份有限公司 | 用于核电站中的应急堆芯冷却系统的大容量吸滤器 |
| TWI624841B (zh) * | 2011-06-01 | 2018-05-21 | 傳斯可產品公司 | 用於核能發電廠內緊急爐心冷卻系統之高容量吸濾器 |
| CN109478435A (zh) * | 2017-06-30 | 2019-03-15 | 原子能技术科学研究设计院股份公司 | 沉淀槽的保护装置在水慢化的核反应堆冷却应急系统中,可以保护坑保护装置的过滤模块和过滤元件 |
| CN111032181A (zh) * | 2017-12-29 | 2020-04-17 | 原子能技术科学研究设计院股份公司 | 核电站贮水池有源滤波器 |
| CN111032181B (zh) * | 2017-12-29 | 2021-12-03 | 原子能技术科学研究设计院股份公司 | 核电站贮水池主动过滤器 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20080059631A (ko) | 2008-06-30 |
| US20100025315A1 (en) | 2010-02-04 |
| US20070084782A1 (en) | 2007-04-19 |
| WO2007044127A3 (en) | 2008-04-10 |
| WO2007044127A2 (en) | 2007-04-19 |
| US8048319B2 (en) | 2011-11-01 |
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