核电厂常规岛倒置立式高压加热器改造

Modification of the Vertical Channel Down-Mounting HighPressure Heater in the First Independently Developed Nuclear Power Plant

田湾核电站一期工程高压加热器为俄罗斯列宁格勒金属制造厂设计制造、倒置立式结构,换热面积为2 470 m2。2006年,在调试阶段发现1号机组5B、6B高加传热管泄漏较严重,且堵管达到或接近设计余量。为此,决定对这两台高压加热器进行改造。改造后的高压加热器各项性能指标均优于设计保证值,填补了国内空白,标志着我国已完全具备自主设计、制造核电百万千瓦级机组常规岛倒置立式高压加热器的能力。

The High Pressure Heaters （HPHs） of Tianwan nuclear power station first stage project, which were vertical charnel down mortaring structure and heat transfer area of every which were 2 470 m2,were designed and manufactured by Russia Leningrad metal manufacturers. It was found that the leakage of the heat exchange tubes of unit 1 HPHs 5B and 613 were very severe, and the number of the blocked tubes reached to or near design allowance during the commissioning phase in 2006. Therefore, it was decided to modification these two HPHs. After the modification the various performance indicators of the new HPHs are better than design guarantee value, which fills up the domestic blank, and shows that China has already completely the ability of independent desert and manufacture nuclear power plant vertical channel down mounting HPtt of Milllion- kilowatt Conventional Island.