| 摘要 |
PURPOSE:To prevent sea water from being polluted by radioactive material, by accurately detecting leakage of fluid and breakage in a sea-water heat exchanger without fail, in a sea- water heat exchanger to cool the latent heat of fresh water by sea-water and remove it from the fresh water, being used for the cooling system of a nuclear reactor auxiliary unit in an atomic power plant. CONSTITUTION:When leakage test is performed in a sea-water heat exchanger 26, a feedwater pump, that is a sea-water pump, 31 is operated to feed sea-water into the sea-water heat exchanger 26, to have the pressure more than the atmospheric pressure act on the inside of a heat transfer pipe 33. During the leakage test, on the other hand, the fresh water inlet valve 25 and an outlet valve 27 of a sea-water heat exchanger 26 on a medium fresh water line 23 are closed, and a vent valve 42 which is provided on a vent line 40 on the fresh water side is opened to hold the inside of a chamber 26c on the fresh water side under about the atmospheric pressure. Then the difference is produced in the pressure between the sea-water side any leak hole caused by breakage or corrosion exists, the sea-water flows into the side of fresh water. Accordingly, by taking fresh water from a sampling line 41 after a predetermined time has passed, and by measuring the chlorine content in the fresh water by a sampling device, that is a chlorine content detector 44, leakage of fluid from a sea-water heat exchanger 26 can be detected without fail. |
