WATER SUPPLY FACILITY OF NUCLEAR POWER PLANT

To provide a water supply facility capable of supplying water in the case of the occurrence of an event of total AC power sources failure to a spent fuel storing pool and injecting to a reactor, by fully using an existing facility.SOLUTION: A water supply facility has: emergency water source outlet pipes 2 of multiple circuits for supplying water stored in an emergency water source 1 to a spent fuel storing pool 9 and/or to a reactor 23, water supply pumps 3 (3A, 3B) provided to the emergency water source outlet pipes, respectively, a pool water supplying pipe 5 for supplying water to the spent fuel storing pool, reactor water injection pipes 31, 20 connected to the emergency water source outlet pipes and supplying cooling water to the reactor, a testing pipe 10 connected to the pool water supplying pipe and returning the water of the emergency water source to the emergency water source, and a DC power source 30 supplying power to the water supply pumps in the case of a total AC power sources failure.SELECTED DRAWING: Figure 1 【課題】現有設備を最大限活用し、全交流動力電源喪失事象の発生時に使用済燃料貯蔵プールへの給水や原子炉への注水を可能とする。【解決手段】非常用水源１に貯留された水を前記使用済燃料貯蔵プール９及び／又は前記原子炉２３に給水するために設けられた複数系統の非常用水源出口配管２と、前記非常用水源出口配管にそれぞれ設けられた給水ポンプ３（３Ａ、３Ｂ）と、前記非常用水源出口配管に接続され使用済燃料貯蔵プールに水を供給するプール給水配管５と、前記非常用水源出口配管に接続され原子炉へ冷却水を供給する原子炉注水配管３１、２０と、前記プール給水配管に接続され前記非常用水源の水を当該非常用水源に戻す試験配管１０と、全交流動力電源喪失事象が発生した場合に前記給水ポンプに給電する直流電源３０と、を有する。【選択図】図１