JP3878325B2 - Cold water equipment for ventilation and air conditioning in nuclear facilities - Google Patents

Cold water equipment for ventilation and air conditioning in nuclear facilities Download PDF

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JP3878325B2
JP3878325B2 JP11085798A JP11085798A JP3878325B2 JP 3878325 B2 JP3878325 B2 JP 3878325B2 JP 11085798 A JP11085798 A JP 11085798A JP 11085798 A JP11085798 A JP 11085798A JP 3878325 B2 JP3878325 B2 JP 3878325B2
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cold water
cooling
refrigerator
air conditioning
ventilation air
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JPH11304990A (en
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谷 利 明 菅
川 武 仲
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Toshiba Corp
Toshiba Plant Systems and Services Corp
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Toshiba Corp
Toshiba Plant Systems and Services Corp
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    • 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
    • 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

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  • Other Air-Conditioning Systems (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、原子力施設の換気空調用冷水設備に係わり、特に、複数のプラントを備えた原子力施設の換気空調用冷水設備に関する。
【０００２】
【従来の技術】
一般に原子力施設では、施設内の環境を保つために換気空調設備が設けられており、この換気空調設備の一つとして換気空調用冷水設備がある。この換気空調用冷水設備は空気を冷却するための複数の冷却コイルを備えており、これらの冷却コイルは原子力施設の主給気部もしくは各室に設置されている。
【０００３】
各冷却コイルには冷水配管が接続されており、冷凍機からの冷水が冷水配管を通して冷却コイルに供給されている。
【０００４】
通常、原子力施設の換気空調用冷水設備は複数の冷凍機を備えており、複数の冷凍機の合計容量は、原子力施設内の冷却に必要な夏期の冷房容量から決められている。また一般に、予備のために１台の冷凍機が追加設置されている。
【０００５】
原子力施設の内部は冬期においても冷房が必要であり、換気空調用冷水設備の冷凍機は季節を問わず連続で運転されている。
【０００６】
図５は、従来の原子力施設の換気空調用冷水設備の一例を示した概略系統図である。この従来例においては合計３台の冷凍機１が原子力施設内に設置されており、３台のうちの１台が予備のための冷凍機である。つまり、夏期冷房に必要な冷房容量を１００％とした場合に、３台の冷凍機１はそれぞれ５０％の冷房容量を備えており、冷房容量の合計が１５０％となっている。
【０００７】
なお、冷凍機の設置台数は３台に限られるものではなく、４台設置（うち１台が予備）でも、５台設置（うち１台が予備）でも可能である。
【０００８】
冷凍機１の容量に合わせた冷水ポンプ２が各冷凍機１ごと一台設置されており、冷凍機１と冷水ポンプ２とが一対一で運転されている。冷凍機１で冷却された水は冷水ポンプ２の圧力によって、冷水配管３を通って冷却コイル４に供給される。
【０００９】
冷却コイル４は、主給気部もしくは各室に設置されており、冷却コイル４内を流れる冷水によって冷却コイル４の周辺の空気が冷却される。なお、図５に示した冷却コイル４は、原子力施設内に設置された複数の冷却コイルを総括的に表示したものである。
【００１０】
冷却コイル４にて周辺の空気と熱交換を行った冷水は、冷水配管３を通って冷凍機１に戻る。また、各冷凍機１には冷却水配管５がそれぞれ接続されており、冷却水配管５より供給される水によって冷凍機１の排熱が行われる。さらに、冷凍機１及び冷水ポンプ２の制御は、制御盤６によって行われる。
【００１１】
【発明が解決しようとする課題】
ところが、従来の原子力施設の換気空調用冷水設備は、冬期に外気温度が低下した場合、施設内の冷却コイル４による冷房負荷が低下し、その結果、冷房容量が冷凍機１の最低容量制御範囲外となってしまうことがあった。
【００１２】
例えば、冬期における冷却コイル４の冷房負荷が１０％（夏期の冷房負荷を１００％とする。）まで低下した場合、３台の冷凍機１のうちの２台を停止状態として１台の冷凍機１のみを運転させたとしても、１台の冷凍機１の容量制御範囲の下限値が１０％冷房負荷時の冷房容量よりも小さければ、要求される冷房容量は冷凍機１の最低容量制御範囲を下回ってしまう。
【００１３】
冷房容量が冷凍機１の最低容量制御範囲を下回ると、冷凍機１の冷水出口温度が許容限度を超えて低下してしまい、冷凍機１の自動停止及び再起動が繰り返されるという問題がある。
【００１４】
そこで、本発明は、冬期においても安定運転を行うことができる原子力施設の換気空調用冷水設備を提供することを目的とする。
【００１５】
【課題を解決するための手段】
本発明による原子力施設の換気空調用冷水設備は、複数のプラントを備えた原子力施設の換気空調用冷水設備において、複数の冷凍機によって構成された冷凍装置と、前記冷凍装置にて生成された冷水を前記各プラントの各負荷先に送るための冷水配管と、前記各冷凍機ごとに前記冷水配管の途中に設置された各冷水ポンプと、を備え、前記冷凍機は、前記複数のプラントの間で共用され、容量制御範囲内の冷房容量での運転状態あるいは停止状態であることを特徴とする。
【００１６】
また、本発明による原子力施設の換気空調用冷水設備は、前記冷水配管は、前記各冷凍機に接続された複数の支流配管と、前記複数の支流配管が接続された主流配管と、を備え、前記冷水ポンプは前記支流配管の途中に設置されており、弁を有するバイパス配管によって前記支流配管同士を連結したことを特徴とする。
【００１７】
また、本発明による原子力施設の換気空調用冷水設備は、前記プラントは、ドライウエルを有する原子炉格納容器と、前記ドライウエル内に設置されたドライウエル内ガス冷却用コイルと、を備え、前記冷凍装置にて生成された冷水を前記ドライウエル内ガス冷却コイルにも流通させるようにしたことを特徴とする。
【００１８】
また、本発明による原子力施設の換気空調用冷水設備は、前記冷凍機からの排熱を除去する冷却水を前記冷凍機に供給するための冷却水ポンプと、前記冷却水によって除去された排熱を環境中に放出するための冷却塔と、をさらに備え、前記冷凍機、前記冷水ポンプ、前記冷却水ポンプ、及び前記冷却塔を集中配置したことを特徴とする。
【００１９】
【発明の実施の形態】
第１実施形態
以下、本発明の第１実施形態による原子力施設の換気空調用冷水設備について図１を参照して説明する。なお、図５に示した従来例と同一部材には同一符号を付して説明する。
【００２０】
図１は、本実施形態による原子力施設の換気空調用冷水設備の概略系統図である。この換気空調用冷水設備は、複数プラント立地の原子力施設にて使用されるものであり、図１には、２基の原子力プラントの２つの冷却コイル（負荷先）４が示されている。なお、図１に示した冷却コイル４は、原子力施設内に設置された個々の冷却コイル４を総括的に表示したものである。
【００２１】
合計５台の冷凍機１によって冷凍装置１２が構成されており、これらの冷凍機１は２基の原子力プラントの間で共用されている。なお、本実施形態による原子力施設の換気空調用冷水設備は、例えば軽水炉（沸騰水型原子炉、加圧水型原子炉）に使用することができる。
【００２２】
５台の冷凍機１のうちの１台は予備のための冷凍機である。つまり、夏期冷房に必要な冷房容量を、各プラントあたり１００％とした場合、プラント２基合計で２００％の冷房容量が必要となるが、冷凍機１はそれぞれ５０％の冷房容量を備えており、５台の冷凍機１の合計容量は２５０％である。
【００２３】
なお、本実施形態においては計５台の冷凍機１によって冷凍装置１２を構成し、また、プラントの数を２基としているが、冷凍機１の設置台数は５台に限られるものではなく、また、プラント数も２基に限られるものではない。要するに、複数の冷凍機の合計容量が、複数のプラントの夏期の合計冷房容量を満たしていれば良い。なお、少なくとも１台の冷凍機を予備として設けることが好ましい。
【００２４】
冷凍装置１２にて生成された冷水は、冷水配管３を経由して各プラントの各冷却コイル（負荷先）４に送られる。冷水配管３は、各冷凍機１に接続された複数の冷水供給側の支流配管１３ａ及び冷水還流側の支流配管１３ｂと、これらの支流配管１３ａ、１３ｂが接続された冷水供給側の主流配管１４ａ及び冷水還流側の主流配管１４ｂと、を備えている。
【００２５】
各冷凍機１ごとに１台の冷水ポンプ２が設けられており、各冷水ポンプ２は冷水還流側の各支流配管１３ｂの途中に配置されている。冷水ポンプ２の一台の容量は、冷凍機１の一台の容量に合わせて選択され、設定されている。冷凍機１で冷却された水は冷水ポンプ２の圧力よって、冷水供給側の支流配管１３ａ及び主流配管１４ａを通って各冷却コイル４に供給される。
【００２６】
冷却コイル４にて周辺の空気と熱交換を行った冷水は、冷水還流側の支流配管１３ｂ及び主流配管１４ｂを通って冷凍機１に戻る。
【００２７】
各冷凍機１には冷却水配管５がそれぞれ接続されており、冷却水配管５より供給される水によって冷凍機１の排熱が行われる。また、すべての冷凍機１及びすべての冷水ポンプ２の制御は、単一の制御盤６によって行われる。
【００２８】
そして、各プラントの夏期の冷房容量を１００％とすると、原子力施設全体の夏期の冷房容量は２００％になる。本実施形態による原子力施設の換気空調用冷水設備においては、冷凍装置１２を構成する複数の冷凍機１は２基のプラントの間で共用されているので、冷凍装置１２に要求される冷房容量は２００％である。したがって、冷凍機１の合計設置台数は、１プラントを対象とする従来の場合に比べて増加する。
【００２９】
また、本実施形態においては、冬期の冷房負荷が、１プラントを対象とする従来の場合に比べて増加する。つまり、１プラントあたりの冬期の冷房負荷が１０％（夏期の冷房負荷を１００％とする。）の場合、２プラント合計の冬期の冷房負荷は２０％になる。したがって、５台の冷凍機１のうちの４台を停止状態として１台の冷凍機１のみを運転させた場合、運転状態にある１台の冷凍機１に要求される冷房負荷は２０％となる。
【００３０】
このように本実施形態による原子力施設の換気空調用冷水設備によれば、冷凍機１の設置台数の増加によって、冷凍機１の一台あたりの容量制御の容量が低下し、また、冬期の冷房負荷が増加して十分な冷房負荷が維持される。
【００３１】
このため、冬期においても冷房容量が冷凍機１の容量制御範囲内となり、冷凍機１の冷水出口温度が許容限度を超えて低下することを防止し、ひいては冷凍機１の自動停止が防止され、これによって冷凍機１の安定運転を確保し、冷凍機１の信頼性の向上を図ることができる。
【００３２】
また、従来のように各プラントごとに換気空調用冷水設備を設置する場合には、冷凍機１、冷水ポンプ２などを含む予備の系統及び制御盤６を各プラントごとに設置する必要があるが、本実施形態のように複数プラントで冷凍機１を共用することによって、予備の系統及び制御盤を削減することができる。
【００３３】
さらに、従来のように各プラントごとに換気空調用冷水設備を設置した場合には、冷房負荷の小さい冬期においても、各プラントごとに少なくとも１台の冷凍機１及び冷水ポンプ２を運転させる必要がある（この運転が不安定になってしまうことは既述の通り）。一方、本実施形態のように複数プラントで冷凍機１を共用することによって、冷房負荷が小さい冬期においては、複数のプラントに対して１台の冷凍機１及び冷水ポンプ２を運転するだけで済み、必要電力の低減を図ることができる。
【００３４】
第２実施形態
次に、本発明の第２実施形態による原子力施設の換気空調用冷水設備について図２を参照して説明する。なお、本実施形態は上述した第１実施形態に対して構成を一部追加したものであるので、以下では、第１実施形態と同一の構成要素については同一符号を付して詳細な説明は省略する。
【００３５】
図２に示したように、本実施形態による原子力施設の換気空調用冷却設備においては、隣接する冷水還流側の支流配管１３ｂ同士がバイパス配管７にて連結されており、各バイパス配管７の途中には仕切弁８がそれぞれ設けられている。また、冷水還流側の支流配管１３ｂの、バイパス配管７の接続部の上流側及び下流側に仕切弁９が設けられている。
【００３６】
このように本実施形態による原子力施設の換気空調用冷却設備は、バイパス配管７及び仕切弁８、９を設けたので、冷凍機１と冷水ポンプ２のいわゆるたすき運転が可能である。例えば、定期検査の際に、自身の系統の冷水ポンプ２が点検中の場合、仕切弁８、９の開閉状態を変更することによって、隣の系統の冷水ポンプ２を使用して冷凍機１を運転することができる。
【００３７】
第３実施形態
次に、本発明の第３実施形態による原子力施設の換気空調用冷水設備について図３を参照して説明する。なお、本実施形態は上述した第１実施形態に対して構成を一部追加したものであるので、以下では、第１実施形態と同一の構成要素については同一符号を付して詳細な説明は省略する。
【００３８】
本実施形態による換気空調用冷水設備が使用される原子力設備は、原子炉格納容器を有する沸騰水型原子炉を２基備えており、それぞれの原子炉格納容器の内部のドライウエルには、図３に示したドライウエル内ガス冷却コイル１６が設置されている。
【００３９】
そして、本実施形態においては、主流配管１４ａ、１４ｂとドライウエル内ガス冷却コイル１６とがドライウエル用配管１５を介して連結されており、冷凍装置１２にて生成された冷水を、冷却コイル４のみならず、各ドライウエル内ガス冷却コイル１６にも流通させるようになっている。
【００４０】
このように本実施形態による原子力施設の換気空調用冷水設備においては、ドライウエル内ガス冷却コイル１６にも冷水を流通させるようにしたので、冷凍装置１２に対する冷房負荷が増大し、冬期における冷凍機１の安定運転の確保及び冷凍機１の信頼性の向上をより確実に達成することができる。
【００４１】
なお、本実施形態においても、上述した第２実施形態と同様にしてバイパス配管７、仕切弁８、９を追加設置することができる。
【００４２】
第４実施形態
次に、本発明の第４実施形態による原子力施設の換気空調用冷水設備について図４を参照して説明する。なお、本実施形態は上述した第１実施形態の構成を一部変更したものであるので、以下では、第１実施形態と同一の構成要素については同一符号を付して詳細な説明は省略する。
【００４３】
図４に示したように、冷却水配管５の途中には、冷凍機１からの排熱を除去する冷却水を冷凍機１に供給するための冷却水ポンプ１１が設けられている。また、各冷却水配管５は、冷却水によって除去された排熱を環境中に放出するための各冷却塔１０に接続されている。
【００４４】
そして、本実施形態による原子力施設の換気空調用冷水設備においては、冷凍機１、冷水ポンプ２、冷却水ポンプ１１、及び冷却塔１０が互いに近接して集中配置されている。
【００４５】
このように本実施形態においては、冷凍機１、冷水ポンプ２などの複数の機器が集中配置されているので、これらの機器のメンテナンスを実施しやすくなる。
【００４６】
【発明の効果】
以上述べたように本発明による原子力施設の換気空調用冷水設備によれば、複数のプラントで冷凍機を共用するようにしたので、冬期においても、冷凍機の安定運転を確保し、冷凍機の信頼性の向上を図ることができ、必要電力の低減を図ることができる。
【図面の簡単な説明】
【図１】本発明の第１実施形態による原子力施設の換気空調用冷水設備の概略系統図。
【図２】本発明の第２実施形態による原子力施設の換気空調用冷水設備の概略系統図。
【図３】本発明の第３実施形態による原子力施設の換気空調用冷水設備の概略系統図。
【図４】本発明の第４実施形態による原子力施設の換気空調用冷水設備の概略系統図。
【図５】従来の原子力施設の換気空調用冷水設備の概略系統図。
【符号の説明】
１ 冷凍機
２ 冷水ポンプ
３ 冷水配管
４ 冷却コイル
５ 冷却水配管
６ 制御盤
７ バイパス配管
８、９ 仕切弁
１０ 冷却塔
１１ 冷却水ポンプ
１２ 冷凍装置
１３ 支流配管
１４ 主流配管
１５ ドライウエル用配管
１６ ドライウエル内ガス冷却コイル[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cooling water facility for ventilation air conditioning in a nuclear facility, and particularly relates to a cooling water facility for ventilation air conditioning in a nuclear facility including a plurality of plants.
[0002]
[Prior art]
In general, in a nuclear facility, a ventilation air conditioner is provided in order to maintain the environment in the facility, and one of the ventilating air conditioners is a cold water facility for ventilating air conditioning. This cooling water facility for ventilation air conditioning is provided with a plurality of cooling coils for cooling air, and these cooling coils are installed in a main air supply section or each room of a nuclear facility.
[0003]
Cold water piping is connected to each cooling coil, and cold water from the refrigerator is supplied to the cooling coil through the cold water piping.
[0004]
Usually, the cooling water equipment for ventilation air conditioning in a nuclear facility is provided with a plurality of refrigerators, and the total capacity of the plurality of refrigerators is determined from the cooling capacity in summer required for cooling in the nuclear facility. In general, a single refrigerator is additionally installed as a spare.
[0005]
The inside of nuclear facilities needs to be cooled even in the winter, and the refrigerators for chilled water for ventilation and air conditioning are operated continuously regardless of the season.
[0006]
FIG. 5 is a schematic system diagram showing an example of a conventional cold water facility for ventilation air conditioning in a nuclear facility. In this conventional example, a total of three refrigerators 1 are installed in the nuclear facility, and one of the three refrigerators is a spare refrigerator. That is, assuming that the cooling capacity required for the summer cooling is 100%, the three refrigerators 1 each have a cooling capacity of 50%, and the total cooling capacity is 150%.
[0007]
Note that the number of refrigerators installed is not limited to three, and can be four (one is spare) or five (one is spare).
[0008]
One chilled water pump 2 corresponding to the capacity of the refrigerator 1 is installed for each refrigerator 1, and the refrigerator 1 and the cold water pump 2 are operated one-on-one. The water cooled by the refrigerator 1 is supplied to the cooling coil 4 through the cold water pipe 3 by the pressure of the cold water pump 2.
[0009]
The cooling coil 4 is installed in the main air supply section or each chamber, and the air around the cooling coil 4 is cooled by the cold water flowing in the cooling coil 4. The cooling coil 4 shown in FIG. 5 is a comprehensive display of a plurality of cooling coils installed in the nuclear facility.
[0010]
The cold water that has exchanged heat with the surrounding air in the cooling coil 4 returns to the refrigerator 1 through the cold water pipe 3. In addition, a cooling water pipe 5 is connected to each refrigerator 1, and the exhaust heat of the refrigerator 1 is performed by water supplied from the cooling water pipe 5. Further, the control of the refrigerator 1 and the cold water pump 2 is performed by the control panel 6.
[0011]
[Problems to be solved by the invention]
However, in the conventional cooling water facility for air conditioning in nuclear facilities, when the outside air temperature decreases in winter, the cooling load by the cooling coil 4 in the facility decreases, and as a result, the cooling capacity is within the minimum capacity control range of the refrigerator 1. Sometimes it was outside.
[0012]
For example, when the cooling load of the cooling coil 4 in winter decreases to 10% (the cooling load in summer is 100%), two of the three refrigerators 1 are stopped and one refrigerator Even if only one is operated, if the lower limit value of the capacity control range of one refrigerator 1 is smaller than the cooling capacity at the time of 10% cooling load, the required cooling capacity is the minimum capacity control range of the refrigerator 1 Will fall below.
[0013]
When the cooling capacity falls below the minimum capacity control range of the refrigerator 1, the cold water outlet temperature of the refrigerator 1 decreases beyond the allowable limit, and there is a problem that the automatic stop and restart of the refrigerator 1 are repeated.
[0014]
Then, an object of this invention is to provide the cold water equipment for ventilation air conditioning of the nuclear facility which can perform a stable operation also in winter.
[0015]
[Means for Solving the Problems]
The cold water equipment for ventilation air conditioning of a nuclear facility according to the present invention is a cold water equipment for ventilation air conditioning of a nuclear facility equipped with a plurality of plants, a refrigeration apparatus constituted by a plurality of refrigerators, and cold water generated by the refrigeration apparatus A chilled water pipe for sending to each load destination of each plant, and each chilled water pump installed in the middle of the chilled water pipe for each of the refrigerators, the refrigerator between the plurality of plants And is in an operating state or a stopped state at a cooling capacity within a capacity control range .
[0016]
Moreover, the cold water facility for ventilation air conditioning of a nuclear facility according to the present invention, the cold water pipe comprises a plurality of branch pipes connected to the respective refrigerators, and a main pipe connected to the plurality of branch pipes, The cold water pump is installed in the middle of the branch pipe, and the branch pipes are connected to each other by a bypass pipe having a valve.
[0017]
Further, according to the present invention, there is provided a chilled water facility for ventilation air conditioning of a nuclear facility, wherein the plant includes a reactor containment vessel having a dry well, and a gas cooling coil in the dry well installed in the dry well, The cold water generated by the refrigeration apparatus is also circulated through the gas cooling coil in the dry well.
[0018]
Further, the cold water facility for ventilation air conditioning of a nuclear facility according to the present invention includes a cooling water pump for supplying cooling water for removing exhaust heat from the refrigerator to the refrigerator, and exhaust heat removed by the cooling water. And a cooling tower for releasing the water into the environment, wherein the refrigerator, the cold water pump, the cooling water pump, and the cooling tower are arranged in a concentrated manner.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
First Embodiment Hereinafter, a cold water facility for ventilation air conditioning of a nuclear facility according to a first embodiment of the present invention will be described with reference to FIG. Note that the same members as those in the conventional example shown in FIG.
[0020]
FIG. 1 is a schematic system diagram of a cold water facility for ventilation air conditioning of a nuclear facility according to the present embodiment. This cooling air-conditioning equipment for ventilation air conditioning is used in a nuclear facility located in a plurality of plants. FIG. 1 shows two cooling coils (load destinations) 4 of two nuclear power plants. The cooling coil 4 shown in FIG. 1 is a comprehensive display of the individual cooling coils 4 installed in the nuclear facility.
[0021]
A total of five refrigerators 1 constitute a refrigeration apparatus 12, and these refrigerators 1 are shared between two nuclear power plants. In addition, the cold water equipment for ventilation air conditioning of the nuclear facility according to the present embodiment can be used for, for example, a light water reactor (boiling water reactor, pressurized water reactor).
[0022]
One of the five refrigerators 1 is a spare refrigerator. In other words, if the cooling capacity required for summer cooling is 100% for each plant, a total of two plants requires 200% cooling capacity, but the refrigerator 1 has a cooling capacity of 50%. The total capacity of the five refrigerators 1 is 250%.
[0023]
In the present embodiment, the refrigeration apparatus 12 is configured by a total of five refrigerators 1 and the number of plants is two, but the number of refrigerators 1 installed is not limited to five, Also, the number of plants is not limited to two. In short, it is only necessary that the total capacity of the plurality of refrigerators satisfies the summer total cooling capacity of the plurality of plants. In addition, it is preferable to provide at least one refrigerator as a spare.
[0024]
The cold water generated by the refrigeration apparatus 12 is sent to each cooling coil (load destination) 4 of each plant via the cold water pipe 3. The chilled water pipe 3 includes a plurality of chilled water supply side branch pipes 13 a and a chilled water return side branch pipe 13 b connected to each refrigerator 1, and a chilled water supply side mainstream pipe 14 a to which these branch pipes 13 a and 13 b are connected. And a main flow pipe 14b on the cold water reflux side.
[0025]
One chilled water pump 2 is provided for each refrigerator 1, and each chilled water pump 2 is disposed in the middle of each branch pipe 13 b on the chilled water recirculation side. The capacity of one cold water pump 2 is selected and set according to the capacity of one refrigerator 1. The water cooled by the refrigerator 1 is supplied to each cooling coil 4 by the pressure of the cold water pump 2 through the branch water supply pipe 13a and the main flow pipe 14a on the cold water supply side.
[0026]
The cold water that has exchanged heat with ambient air in the cooling coil 4 returns to the refrigerator 1 through the branch pipe 13b and the main flow pipe 14b on the cold water recirculation side.
[0027]
A cooling water pipe 5 is connected to each refrigerator 1, and the exhaust heat of the refrigerator 1 is performed by water supplied from the cooling water pipe 5. Further, all the refrigerators 1 and all the cold water pumps 2 are controlled by a single control panel 6.
[0028]
And if the cooling capacity in summer of each plant is 100%, the cooling capacity in summer of the whole nuclear facility is 200%. In the cooling water facility for ventilation air conditioning of the nuclear facility according to the present embodiment, since the plurality of refrigerators 1 constituting the refrigeration apparatus 12 are shared between two plants, the cooling capacity required for the refrigeration apparatus 12 is 200%. Therefore, the total number of installed refrigerators 1 is increased as compared with the conventional case targeting one plant.
[0029]
Moreover, in this embodiment, the cooling load in winter increases compared with the conventional case for one plant. In other words, if the cooling load in winter per plant is 10% (the cooling load in summer is 100%), the cooling load in winter for the total of the two plants is 20%. Accordingly, when only one refrigerator 1 is operated with four of the five refrigerators 1 being stopped, the cooling load required for one refrigerator 1 in the operating state is 20%. Become.
[0030]
As described above, according to the cooling water facility for ventilation air conditioning of the nuclear facility according to the present embodiment, the capacity control capacity per unit of the refrigerator 1 is reduced due to an increase in the number of installed refrigerators 1, and cooling in winter is performed. The load increases and a sufficient cooling load is maintained.
[0031]
For this reason, even in winter, the cooling capacity is within the capacity control range of the refrigerator 1, preventing the chilled water outlet temperature of the refrigerator 1 from falling below an allowable limit, and thus preventing the automatic stop of the refrigerator 1. As a result, stable operation of the refrigerator 1 can be secured and the reliability of the refrigerator 1 can be improved.
[0032]
Moreover, when installing the cooling water equipment for ventilation air conditioning for every plant like before, it is necessary to install the spare system | strain and the control panel 6 containing the refrigerator 1, the cold water pump 2, etc. for every plant. By sharing the refrigerator 1 in a plurality of plants as in this embodiment, it is possible to reduce spare systems and control panels.
[0033]
Further, when a cooling water facility for ventilation and air conditioning is installed for each plant as in the prior art, it is necessary to operate at least one refrigerator 1 and chilled water pump 2 for each plant even in winter when the cooling load is small. Yes (as described above, this operation becomes unstable). On the other hand, by sharing the refrigerator 1 in a plurality of plants as in this embodiment, in the winter season when the cooling load is small, it is only necessary to operate one refrigerator 1 and the cold water pump 2 for a plurality of plants. The required power can be reduced.
[0034]
Second Embodiment Next, a cold water facility for ventilation air conditioning of a nuclear facility according to a second embodiment of the present invention will be described with reference to FIG. In addition, since this embodiment adds a part of structure with respect to 1st Embodiment mentioned above, below, the same code | symbol is attached | subjected about the component same as 1st Embodiment, and detailed description is not carried out. Omitted.
[0035]
As shown in FIG. 2, in the cooling facility for ventilation air conditioning of the nuclear facility according to the present embodiment, the adjacent branch water pipes 13 b on the cold water return side are connected by the bypass pipes 7. Each is provided with a gate valve 8. Further, gate valves 9 are provided on the upstream side and the downstream side of the connecting portion of the bypass pipe 7 in the branch pipe 13b on the cold water recirculation side.
[0036]
As described above, the cooling facility for ventilation air conditioning of the nuclear facility according to the present embodiment is provided with the bypass pipe 7 and the gate valves 8 and 9, so that the so-called dry operation of the refrigerator 1 and the cold water pump 2 is possible. For example, when the chilled water pump 2 of its own system is under inspection during the periodic inspection, the refrigerator 1 can be installed using the chilled water pump 2 of the adjacent system by changing the open / close state of the gate valves 8 and 9. You can drive.
[0037]
Third Embodiment Next, a cold water facility for ventilation air conditioning in a nuclear facility according to a third embodiment of the present invention will be described with reference to FIG. In addition, since this embodiment adds a part of structure with respect to 1st Embodiment mentioned above, below, the same code | symbol is attached | subjected about the component same as 1st Embodiment, and detailed description is not carried out. Omitted.
[0038]
The nuclear power plant in which the cooling water facility for ventilation air conditioning according to the present embodiment is used includes two boiling water reactors each having a reactor containment vessel. The gas cooling coil 16 in the dry well shown in 3 is installed.
[0039]
In the present embodiment, the mainstream pipes 14 a and 14 b and the dry well gas cooling coil 16 are connected via the dry well pipe 15, and the cold water generated by the refrigeration apparatus 12 is supplied to the cooling coil 4. In addition, the gas is passed through each dry well gas cooling coil 16.
[0040]
As described above, in the cold water facility for ventilation air conditioning of the nuclear facility according to the present embodiment, since the cold water is also circulated through the gas cooling coil 16 in the dry well, the cooling load on the refrigeration apparatus 12 increases, and the refrigerator in the winter season. 1 can be ensured more reliably and the reliability of the refrigerator 1 can be improved more reliably.
[0041]
Also in this embodiment, the bypass pipe 7 and the gate valves 8 and 9 can be additionally installed in the same manner as in the second embodiment described above.
[0042]
4. Fourth Embodiment Next, a cold water facility for ventilation air conditioning of a nuclear facility according to a fourth embodiment of the present invention will be described with reference to FIG. In addition, since this embodiment changes a part of structure of 1st Embodiment mentioned above, below, the same code | symbol is attached | subjected about the same component as 1st Embodiment, and detailed description is abbreviate | omitted. .
[0043]
As shown in FIG. 4, a cooling water pump 11 for supplying cooling water for removing exhaust heat from the refrigerator 1 to the refrigerator 1 is provided in the middle of the cooling water pipe 5. Moreover, each cooling water piping 5 is connected to each cooling tower 10 for releasing the exhaust heat removed by the cooling water into the environment.
[0044]
And in the cold water equipment for ventilation air conditioning of the nuclear facility by this embodiment, the refrigerator 1, the cold water pump 2, the cooling water pump 11, and the cooling tower 10 are concentrated and arrange | positioned mutually close.
[0045]
Thus, in this embodiment, since several apparatus, such as the refrigerator 1 and the cold water pump 2, are concentrated, it becomes easy to implement maintenance of these apparatuses.
[0046]
【The invention's effect】
As described above, according to the cold water facility for ventilation air conditioning of a nuclear facility according to the present invention, since the refrigerator is shared by a plurality of plants, the stable operation of the refrigerator can be ensured even in the winter season. it is possible to improve the reliability, Ru can be reduced power needs.
[Brief description of the drawings]
FIG. 1 is a schematic system diagram of a cold water facility for ventilation air conditioning of a nuclear facility according to a first embodiment of the present invention.
FIG. 2 is a schematic system diagram of a cold water facility for ventilation air conditioning in a nuclear facility according to a second embodiment of the present invention.
FIG. 3 is a schematic system diagram of a cold water facility for ventilation air conditioning of a nuclear facility according to a third embodiment of the present invention.
FIG. 4 is a schematic system diagram of a cold water facility for ventilation air conditioning of a nuclear facility according to a fourth embodiment of the present invention.
FIG. 5 is a schematic system diagram of a conventional cold water facility for ventilation air conditioning in a nuclear facility.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Chilled water pump 3 Chilled water piping 4 Cooling coil 5 Cooling water piping 6 Control panel 7 Bypass piping 8, 9 Gate valve 10 Cooling tower 11 Cooling water pump 12 Refrigeration apparatus 13 Branch flow piping 14 Main flow piping 15 Dry well piping 16 Dry Gas cooling coil in well

Claims (4)

複数のプラントを備えた原子力施設の換気空調用冷水設備において、
複数の冷凍機によって構成された冷凍装置と、
前記冷凍装置にて生成された冷水を前記各プラントの各負荷先に送るための冷水配管と、
前記各冷凍機ごとに前記冷水配管の途中に設置された各冷水ポンプと、を備え、
前記冷凍機は、前記複数のプラントの間で共用され、容量制御範囲内の冷房容量での運転状態あるいは停止状態であることを特徴とする原子力施設の換気空調用冷水設備。In the cold water equipment for ventilation air conditioning in nuclear facilities equipped with multiple plants,
A refrigeration apparatus constituted by a plurality of refrigerators;
Cold water piping for sending the cold water generated in the refrigeration apparatus to each load destination of each plant;
Each cold water pump installed in the middle of the cold water pipe for each of the refrigerators,
The chiller is shared between the plurality of plants and is in an operating state or a stopped state with a cooling capacity within a capacity control range . 前記冷水配管は、前記各冷凍機に接続された複数の支流配管と、前記複数の支流配管が接続された主流配管と、を備え、前記冷水ポンプは前記支流配管の途中に設置されており、弁を有するバイパス配管によって前記支流配管同士を連結したことを特徴とする請求項１記載の原子力施設の換気空調用冷水設備。The cold water pipe includes a plurality of branch pipes connected to the respective refrigerators, and a main flow pipe to which the plurality of branch pipes are connected, and the cold water pump is installed in the middle of the branch pipe, The cold water equipment for ventilation air conditioning of a nuclear facility according to claim 1, wherein the branch pipes are connected by a bypass pipe having a valve. 前記プラントは、ドライウエルを有する原子炉格納容器と、前記ドライウエル内に設置されたドライウエル内ガス冷却用コイルと、を備え、
前記冷凍装置にて生成された冷水を前記ドライウエル内ガス冷却コイルにも流通させるようにしたことを特徴とする請求項１又は請求項２に記載の原子力施設の換気空調用冷水設備。The plant includes a reactor containment vessel having a dry well, and a gas cooling coil in the dry well installed in the dry well,
The cold water equipment for ventilation air conditioning in a nuclear facility according to claim 1 or 2, wherein the cold water generated by the refrigeration apparatus is also circulated through the gas cooling coil in the dry well. 前記冷凍機からの排熱を除去する冷却水を前記冷凍機に供給するための冷却水ポンプと、前記冷却水によって除去された排熱を環境中に放出するための冷却塔と、をさらに備え、
前記冷凍機、前記冷水ポンプ、前記冷却水ポンプ、及び前記冷却塔を集中配置したことを特徴とする請求項１乃至請求項３のいずれか一項に記載の原子力施設の換気空調用冷水設備。A cooling water pump for supplying cooling water to remove the exhaust heat from the refrigerator to the refrigerator; and a cooling tower for releasing the exhaust heat removed by the cooling water into the environment. ,
The cold water equipment for ventilation air conditioning of a nuclear facility according to any one of claims 1 to 3, wherein the refrigerator, the cold water pump, the cooling water pump, and the cooling tower are centrally arranged.
JP11085798A 1998-04-21 1998-04-21 Cold water equipment for ventilation and air conditioning in nuclear facilities Expired - Lifetime JP3878325B2 (en)

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