JPH10132992A - Sea water inlet channel for nuclear power plant - Google Patents
Sea water inlet channel for nuclear power plantInfo
- Publication number
- JPH10132992A JPH10132992A JP8287909A JP28790996A JPH10132992A JP H10132992 A JPH10132992 A JP H10132992A JP 8287909 A JP8287909 A JP 8287909A JP 28790996 A JP28790996 A JP 28790996A JP H10132992 A JPH10132992 A JP H10132992A
- Authority
- JP
- Japan
- Prior art keywords
- seawater
- sea water
- water inlet
- inspection
- maintenance
- 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.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は原子力発電所の海水
取水路に関する。The present invention relates to a seawater intake channel for a nuclear power plant.
【０００２】[0002]
【従来の技術】原子力発電所は同一敷地内に複数の原子
力発電プラントが設置される例が多いが、このときの海
水取水路は、図６に示すように、各々の発電プラント毎
に独立した取水路を設置した構成とするのが一般的であ
る。海水取水路にはプラント運転中に海棲生物等が付着
するため、定期検査期間にこれらの除去・清掃が行われ
る。同時に取水スクリーンの分解保守点検も行われる。2. Description of the Related Art Nuclear power plants often have a plurality of nuclear power plants installed on the same site. At this time, the seawater intake channel is independent for each power plant as shown in FIG. It is common to adopt a configuration with an intake channel. Since marine organisms and the like adhere to the seawater intake channel during plant operation, they are removed and cleaned during the periodic inspection period. At the same time, the intake screen is disassembled and maintained.
【０００３】一方、定期検査期間でも原子力発電プラン
ト各種設備の冷却・除熱のために冷却用海水ポンプの一
部系列の運転が必要となる。このため、海水取水路の清
掃および取水スクリーンの分解保守点検は冷却用海水ポ
ンプの分解保守計画に合わせ、止水用角落しを図６に示
す海水取入部に挿入して取水路を外洋から分離し、取水
路の海水を抜き出した後に行われる。[0003] On the other hand, even during the period of the periodic inspection, it is necessary to operate a part of a cooling seawater pump for cooling and heat removal of various facilities of a nuclear power plant. For this reason, the cleaning of the seawater intake channel and the disassembly and maintenance inspection of the intake screen are performed in accordance with the disassembly and maintenance plan of the cooling seawater pump. It is performed after extracting seawater from the intake channel.
【０００４】また、海水取水路は、敷地条件などにより
発電所港湾内から直接取水する形式あるいは沖合いに設
置した海水取水塔から取水トンネルを介して取水する形
式があり、取水路長が長くなる場合がある。取水路長が
長い場合には、取水路の清掃作業に多大な時間を費やす
こととなり、この清掃作業が定期検査期間を左右しうる
ものとなっていた。更に、原子力発電所の稼動率向上が
要求される状況下では、海水取水路の清掃期間の短縮が
必要となっている。[0004] Further, the seawater intake channel may be of a type of directly taking in water from the harbor of the power plant or a type of taking off water from a seawater intake tower installed offshore through an intake tunnel depending on site conditions. There is. When the length of the intake channel is long, a large amount of time is required for cleaning the intake channel, and this cleaning operation can affect the period of the periodic inspection. Further, in a situation where the operation rate of a nuclear power plant needs to be improved, it is necessary to shorten the cleaning period of the seawater intake channel.
【０００５】なお、海水取水路を連絡水路で接続した構
成として、特開昭63−186190号公報「原子力発電所の海
水取水設備」が提案されているが、この内容は定期検査
時のみ海水取水路の清掃が可能な構成である。Japanese Patent Application Laid-Open No. 63-186190 proposes a "seawater intake system for a nuclear power plant" as a configuration in which seawater intake channels are connected by connecting waterways. It is a configuration that can clean the road.
【０００６】[0006]
【発明が解決しようとする課題】従来の原子力発電所の
海水取水路は、各々の発電プラント毎に独立した取水路
を設置した構成であったため、海水取水路の清掃および
取水スクリーンの分解保守点検は定期検査時のみ可能な
構成となっていた。このため、海水取水路および取水ス
クリーンの清掃作業・分解保守点検作業が定期検査時に
集中する構成であった。Since the conventional seawater intake channel of a nuclear power plant has a configuration in which an independent intake channel is installed for each power plant, cleaning of the seawater intake channel and disassembly / maintenance inspection of the intake screen are performed. Had a configuration that could be performed only during a periodic inspection. For this reason, the cleaning work and the disassembly maintenance and inspection work of the seawater intake channel and the intake screen are concentrated at the time of the periodic inspection.
【０００７】本発明の目的は、海水取水設備の清掃・分
解保守点検時期の自由度を持たせ、最終的に定期検査期
間の短縮化を図り得る原子力発電所の海水取水路を提供
することにある。An object of the present invention is to provide a seawater intake channel of a nuclear power plant which allows flexibility in cleaning / disassembly / maintenance / inspection time of a seawater intake facility and can eventually shorten a period of a periodic inspection. is there.
【０００８】[0008]
【課題を解決するための手段】本発明は、上記目的を達
成するために、次のような海水取水路で構成される。同
一敷地内の発電プラントの海水取水路を取水スクリーン
下流で連絡水路により接続させ、当該プラントの海水取
水路の清掃および取水スクリーンの保守点検の際には、
他複数系列の発電プラントの海水取水路から海水冷却水
を連絡水路を介して、当該プラントに導いて冷却用海水
ポンプに必要な海水を供給する。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention comprises the following seawater intake channel. The seawater intake channel of the power plant on the same premises is connected by a communication channel downstream of the intake screen, and when cleaning the seawater intake channel of the plant and performing maintenance of the intake screen,
Seawater cooling water is guided from the seawater intake channels of the power plants of the other multiple systems to the plant via the connecting water channel to supply necessary seawater to the cooling seawater pump.
【０００９】以上により、冷却用海水ポンプの保守点検
工程に左右されずに、かつ、プラント通常運転中でも、
海水取水路および取水スクリーンは当該設備のみの独自
の保守点検工程で清掃・保守点検が可能となり、当該設
備の保守点検期間を定期検査期間のクリティカル工程か
ら外すことが可能となり、上記目的は達成される。As described above, without being affected by the maintenance / inspection process of the cooling seawater pump and during the normal operation of the plant,
The seawater intake channel and the intake screen can be cleaned and maintained in a unique maintenance and inspection process only for the relevant equipment, and the maintenance and inspection period for the relevant equipment can be removed from the critical process of the periodic inspection period. You.
【００１０】[0010]
【発明の実施の形態】本発明の実施例を図１から図６を
用いて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.
【００１１】図１は、本発明の第１の実施例を示す平面
図および連絡水路の部分断面図であり、複数系列プラン
ト間の海水取水路１の下に連絡水路４を敷設し、連絡水
路４から冷却用海水ポンプ６と同一員数に分割された各
海水取水路１に、止水用角落し３を介した分岐水路５を
取水スクリーン２下流の止水用角落し３下流で海水取水
路１下側に接続させたものである。FIG. 1 is a plan view showing a first embodiment of the present invention and a partial cross-sectional view of a communication channel. A communication channel 4 is laid below a seawater intake channel 1 between a plurality of plants. 4, into each seawater intake channel 1 divided into the same number of members as the cooling seawater pump 6, the branch waterway 5 via the water stop angle cut 3 is taken, and the seawater intake channel downstream of the water stop screen 2 at the water stop angle cut 3 downstream. 1 is connected to the lower side.
【００１２】図２は、図１の本発明の実施例をもとに、
海水取水路１および取水スクリーン２の水抜き並びに清
掃・保守点検を行うときの状態および海水の流れの一例
を示した図であり、プラント通常運転時に清掃・保守点
検作業を行う場合のものを示す図である。図２をもと
に、本発明の実施例を説明する。図２は、海水取水路１
ａの清掃および取水スクリーン２ａを分解保守点検する
ときのものであり、図中の斜線部分は水抜き状態を示し
た海水取水路を示している。海水の止水・水抜きは、分
岐水路５ａの止水用角落し３を開き、取水スクリーン上
流側止水用角落し３を挿入し、さらに、海水取水路４と
分岐水路５との接続部上流側止水用角落し３を挿入し、
その後に海水取水路１ａの水を抜くという手順で行う。
この手順により、海水取水路１ａを水抜きした状態で、
連絡水路４からの海水を分岐水路５ａを介して、冷却用
海水ポンプ６ａに導くことができる。同様に、海水取水
路１ｂあるいは１ｃについても、連絡水路４から海水を
冷却用海水ポンプ６ｂあるいは６ｃに導きつつ、海水取
水路１ｂあるいは１ｃの清掃・保守点検が可能となる。
さらに、定期検査時には、プラントのすべての海水取水
路１の水抜きの状態でも、他系列プラントからそれぞれ
の冷却用海水ポンプ６に連絡水路４および分岐水路５を
介して個別に海水を導入することが可能となり、冷却用
海水ポンプ６の保守点検順序および工程に左右されるこ
となく海水取水路１の清掃・保守点検が可能となる。FIG. 2 is based on the embodiment of the present invention shown in FIG.
It is a figure which shows the state at the time of draining and cleaning / maintenance inspection of the seawater intake channel 1 and the intake screen 2, and an example of the flow of seawater when cleaning / maintenance inspection work is performed during normal plant operation. FIG. An embodiment of the present invention will be described with reference to FIG. Figure 2 shows the seawater intake channel 1
This is for cleaning and water intake screen 2a for disassembly, maintenance and inspection, and the hatched portion in the drawing indicates a seawater intake channel showing a drained state. To stop and drain seawater, open the cut-off cutoff 3 of the branch waterway 5a, insert the cutoff 3 for water stoppage upstream of the intake screen, and further connect the seawater intake passage 4 and the branch waterway 5. Insert the upstream water stop corner drop 3
Thereafter, the water is drained from the seawater intake channel 1a.
By this procedure, with the seawater intake channel 1a drained,
Seawater from the connecting waterway 4 can be guided to the cooling seawater pump 6a via the branch waterway 5a. Similarly, with respect to the seawater intake channel 1b or 1c, cleaning, maintenance and inspection of the seawater intake channel 1b or 1c can be performed while guiding the seawater from the communication channel 4 to the cooling seawater pump 6b or 6c.
Furthermore, at the time of the periodic inspection, even if all the seawater intake channels 1 of the plant are drained, the seawater can be individually introduced from the other affiliated plants to the respective cooling seawater pumps 6 via the connection waterway 4 and the branch waterway 5. It becomes possible to perform cleaning and maintenance of the seawater intake channel 1 without being affected by the maintenance inspection sequence and process of the cooling seawater pump 6.
【００１３】図３は、図１の発明の実施例をもとに、定
期検査時における海水取水路１の水抜き状態の一例を示
した図である。図３は冷却用海水ポンプ６ａのみに、連
絡水路４から分岐水路５を介して海水を導入した例であ
る。図２と同様に、止水用角落し３の開閉により、取水
スクリーン２保守点検作業および海水取水路１清掃作業
の工程に左右されることなく、いずれの冷却用海水ポン
プ６にも海水を導入することが可能となる。FIG. 3 is a diagram showing an example of a drainage state of the seawater intake channel 1 at the time of a periodic inspection based on the embodiment of the invention shown in FIG. FIG. 3 shows an example in which seawater is introduced into the cooling seawater pump 6 a only from the connecting waterway 4 via the branch waterway 5. 2, the seawater is introduced into any of the cooling seawater pumps 6 by the opening and closing of the water stop corner drop 3, regardless of the maintenance work of the intake screen 2 and the cleaning work of the seawater intake channel 1. It is possible to do.
【００１４】図４は、図１の発明の実施例をもとに、連
絡水路４の清掃の際の水抜き状態を示した図である。連
絡水路４の清掃は、各分岐水路５の止水用角落し３を挿
入し、連絡水路４の水抜きを行うことで可能となる。FIG. 4 is a view showing a state of drainage when the communication channel 4 is cleaned based on the embodiment of the invention shown in FIG. The cleaning of the communication channel 4 can be performed by inserting the water stop corner drop 3 of each branch channel 5 and draining the communication channel 4.
【００１５】図５は、第２の実施例を示し、海水取水路
４が取水スクリーン２下流と冷却用海水ポンプ６上流で
合流している場合の例を示すものである。図５では、図
１に加えて冷却用海水ポンプ６の上流側に止水用角落し
３を設置し、止水用角落し３の挿入および開放を行うこ
とにより、図１と同様な海水取水路４の清掃・保守点検
が可能となる。FIG. 5 shows a second embodiment in which the seawater intake channel 4 joins downstream of the intake screen 2 and upstream of the cooling seawater pump 6. In FIG. 5, in addition to FIG. 1, a water stop angle drop 3 is installed on the upstream side of the cooling seawater pump 6, and the water stop angle drop 3 is inserted and opened. The road 4 can be cleaned and maintained.
【００１６】なお、本発明の実施例として例示した海水
取水路は循環水系ポンプの海水取水路に関する例を示し
ているが、本発明はこの例の他、循環水系用ポンプ海水
取水路と共用した原子炉補機冷却系海水ポンプ用海水取
水路、あるいは、単独の原子炉補機冷却系海水ポンプ用
海水取水路にも適用できる。Although the seawater intake channel illustrated as an embodiment of the present invention is an example relating to a seawater intake channel of a circulating water system pump, the present invention is also used in common with a circulating water system pump seawater intake channel. The present invention is also applicable to a seawater intake channel for a reactor auxiliary equipment cooling system seawater pump or a single seawater intake channel for a reactor auxiliary equipment cooling system seawater pump.
【００１７】[0017]
【発明の効果】本発明によれば、以下に示す効果があ
る。According to the present invention, the following effects can be obtained.
【００１８】(1）プラント通常運転中に海水取水路の清
掃および取水スクリーンの保守点検が可能となるため、
定期検査時の作業の集中化を排除でき、定期検査期間の
短縮化を図ることができる。(1) During normal operation of the plant, cleaning of the seawater intake channel and maintenance and inspection of the intake screen become possible.
Centralization of the work at the time of the periodic inspection can be eliminated, and the period of the periodic inspection can be shortened.
【００１９】(2）海水取水路および取水スクリーンの清
掃保守点検の作業工程に左右されずに、冷却用海水ポン
プ独自の保守点検作業工程での作業が可能となり、定期
検査時の作業性の改善を図ることができる。(2) The cleaning and maintenance work of the seawater intake channel and the intake screen can be carried out by the maintenance and inspection work process unique to the cooling seawater pump without being affected by the work process, and the workability at the time of periodic inspection is improved. Can be achieved.
【図１】本発明の第１実施例を示す海水取水路の説明
図。FIG. 1 is an explanatory view of a seawater intake channel showing a first embodiment of the present invention.
【図２】第１実施例の通常運転時における海水取水路水
抜き状態を示す平面図。FIG. 2 is a plan view showing a seawater intake channel drainage state during normal operation of the first embodiment.
【図３】第１実施例の定期検査時における海水取水路水
抜き状態を示す平面図。FIG. 3 is a plan view showing a state of draining a seawater intake channel at the time of a periodic inspection according to the first embodiment.
【図４】第１実施例の連絡水路水抜き状態を示す平面
図。FIG. 4 is a plan view showing a drainage state of the communication channel according to the first embodiment.
【図５】本発明の第２実施例を示す海水取水路の平面
図。FIG. 5 is a plan view of a seawater intake channel showing a second embodiment of the present invention.
【図６】従来技術における海水取水路の平面図。FIG. 6 is a plan view of a seawater intake channel according to the related art.
１…海水取水路、２…取水スクリーン、３…止水用角落
し、４…連絡水路、５…分岐水路、６…冷却用海水ポン
プ、７…水路接続部、８…海水の流れ方向、９…水抜き
水路、１０…海。DESCRIPTION OF SYMBOLS 1 ... Seawater intake channel, 2 ... Intake screen, 3 ... Water drop corner cutout, 4 ... Connection waterway, 5 ... Branch waterway, 6 ... Cooling seawater pump, 7 ... Waterway connection part, 8 ... Seawater flow direction, 9 ... water drainage channel, 10 ... sea.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 武藤 寿雄 茨城県日立市幸町三丁目２番１号 日立エ ンジニアリング株式会社内 (72)発明者 平子 静 茨城県日立市幸町三丁目２番１号 日立エ ンジニアリング株式会社内 (72)発明者 飛田 芳則 茨城県日立市幸町三丁目２番１号 日立エ ンジニアリング株式会社内 (72)発明者 大槻 明弘 茨城県日立市幸町三丁目２番１号 日立エ ンジニアリング株式会社内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshio Muto 3-2-1 Sachimachi, Hitachi-shi, Ibaraki Prefecture Within Hitachi Engineering Co., Ltd. (72) Shizuo Hirako 3-2-2 Sachimachi, Hitachi-shi, Ibaraki No. 1 Inside Hitachi Engineering Co., Ltd. (72) Inventor Yoshinori Tobita 2-1-1, Kochi-cho, Hitachi-shi, Ibaraki Prefecture Inside Hitachi Engineering Co., Ltd. (72) Akihiro Otsuki 3-chome, Kochi-cho, Hitachi-shi, Ibaraki No. 2 Hitachi Engineering Co., Ltd.
Claims (1)
発電プラントにおいて、取水スクリーン下流に具備した
止水用角落し下流で複数系列の原子力発電プラント冷却
用海水取水路間を連絡水路により接続させ、上記連絡水
路を介して上記複数系列の原子力発電プラントの海水取
水路間で冷却用海水を融通することを特徴とする原子力
発電所の海水取水路。In a nuclear power plant of a plurality of lines installed on the same site, a seawater intake channel for cooling a nuclear power plant of a plurality of lines is connected downstream of a water drop corner provided at a downstream of a water intake screen. A seawater intake channel for a nuclear power plant, wherein cooling seawater is exchanged between the seawater intake channels of the plurality of nuclear power plants via the communication channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8287909A JPH10132992A (en) | 1996-10-30 | 1996-10-30 | Sea water inlet channel for nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8287909A JPH10132992A (en) | 1996-10-30 | 1996-10-30 | Sea water inlet channel for nuclear power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10132992A true JPH10132992A (en) | 1998-05-22 |
Family
ID=17723304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8287909A Pending JPH10132992A (en) | 1996-10-30 | 1996-10-30 | Sea water inlet channel for nuclear power plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10132992A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016510404A (en) * | 2013-01-25 | 2016-04-07 | エレクトリシテ・ドゥ・フランス | Water intake equipment for cooling nuclear power plants and nuclear power plants equipped with such equipment |
| CN105489258A (en) * | 2016-01-04 | 2016-04-13 | 上海核工程研究设计院 | Non-kinetic energy containment vessel cooling system of floating nuclear power plant |
| CN107489185A (en) * | 2017-06-23 | 2017-12-19 | 中国核电工程有限公司 | The essential service water intake strucure that a kind of band for nuclear power station bypasses |
-
1996
- 1996-10-30 JP JP8287909A patent/JPH10132992A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016510404A (en) * | 2013-01-25 | 2016-04-07 | エレクトリシテ・ドゥ・フランス | Water intake equipment for cooling nuclear power plants and nuclear power plants equipped with such equipment |
| CN105489258A (en) * | 2016-01-04 | 2016-04-13 | 上海核工程研究设计院 | Non-kinetic energy containment vessel cooling system of floating nuclear power plant |
| CN107489185A (en) * | 2017-06-23 | 2017-12-19 | 中国核电工程有限公司 | The essential service water intake strucure that a kind of band for nuclear power station bypasses |
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