Alkaline-permanganate process
    1.
    发明授权
    Alkaline-permanganate process 失效
    碱性高锰酸盐工艺

    公开(公告)号:US5278743A

    公开(公告)日:1994-01-11

    申请号:US979716

    申请日:1992-11-20

    IPC分类号: C23G1/00 G21F9/00 G21C19/42

    CPC分类号: C23G1/00 G21F9/004

    摘要: An alkaline-permanganate process for chemically decontaminating oxidized metal surfaces wetted by primary water circulating in cooling loops of nuclear reactors maintains permanganate-containing primary water at a temperature of about 90.degree. C. and at a pH of 9-12 to oxidize the wetted surfaces. Oxalic acid is then added to the water and the oxalic acid-containing primary water is maintained at a temperature of at least about 90.degree. C. and at a pH of about 5-7 while it is circulated to destroy the permanganate ions and manganese dioxide.

    摘要翻译: 用于对在核反应堆的冷却回路中循环的初级水润湿的氧化金属表面进行化学去污的碱性高锰酸盐方法在约90℃的温度和9-12的pH下保持含高锰酸盐的初级水以氧化润湿表面 。 然后将草酸加入到水中,并且含草酸的一次水保持在至少约90℃的温度和约5-7的pH,同时循环以破坏高锰酸盐离子和二氧化锰 。

    Process for decontaminating a nuclear reactor coolant system
    2.
    发明授权
    Process for decontaminating a nuclear reactor coolant system 失效
    净化核反应堆冷却剂系统的过程

    公开(公告)号:US5305360A

    公开(公告)日:1994-04-19

    申请号:US18138

    申请日:1993-02-16

    摘要: High velocity reactor coolant water in a boiling water reactor or a pressurized water reactor transports radioactive ions and particles from a nuclear reactor vessel to the balance of the reactor coolant system where they deposit on chromium (III) oxide-containing surfaces. These radioactive deposits are removed in a dilute chemical decontamination process wherein permanganate ion-containing reactor coolant water is circulated throughout a reactor coolant system to oxidize chromium (III) oxide surfaces of the system to chromium (IV) oxide. Formic acid is added to the permanganate ion-containing reactor coolant water and then the formic acid-containing water is circulated throughout the reactor coolant system to reduce unreacted permanganate ions in the reactor coolant water to manganous ions.

    摘要翻译: 沸水反应堆或加压水反应堆中的高速反应堆冷却水将放射性离子和颗粒从核反应堆运输到反应堆冷却剂系统的平衡,其中它们沉积在含铬(III)氧化物的表面上。 这些放射性沉积物在稀释的化学去污过程中被除去,其中含高锰酸盐离子的反应堆冷却水循环通过反应堆冷却剂系统,以将体系的氧化铬(III)表面氧化成氧化铬(IV)。 将甲酸加入到含高锰酸盐离子的反应堆冷却水中,然后含甲酸的水在整个反应堆冷却剂系统中循环,以将反应堆冷却水中的未反应的高锰酸盐离子还原成二价锰离子。

    Injection of premixed concentrated chemical solution in steam generator chemical cleaning
    3.
    发明申请
    Injection of premixed concentrated chemical solution in steam generator chemical cleaning 审中-公开
    在蒸汽发生器化学清洗中注入预混浓缩化学溶液

    公开(公告)号:US20090173293A1

    公开(公告)日:2009-07-09

    申请号:US12006615

    申请日:2008-01-04

    IPC分类号: F28G1/00

    CPC分类号: F28G9/00

    摘要: A steam generator chemical cleaning system is provided wherein a concentrated chemical cleaning solution is premixed off-site in sufficient volume and concentration to allow the dilution to proper cleaning level be achieved by slow injection into the generator when filled with demineralized water. The premixed chemicals are transported in a tanker to the generator site and injected therein directly from the tanker.

    摘要翻译: 提供蒸汽发生器化学清洁系统,其中浓缩的化学清洗溶液在足够的体积和浓度的情况下在现场预混合,以便当充满软化水时通过缓慢注入发生器来实现适当的清洁水平。 预混合化学品在油罐车中运送到发电机站并直接从油罐注入。

    Steam generator thermal venting
    4.
    发明申请
    Steam generator thermal venting 审中-公开
    蒸汽发生器热排气

    公开(公告)号:US20100199929A1

    公开(公告)日:2010-08-12

    申请号:US10809074

    申请日:2004-03-25

    IPC分类号: F22B37/48

    CPC分类号: F22B37/486

    摘要: The present invention provides a method of removing sludge deposits from steam generator/boiler tube support plates (TSP) using a combination of thermal stress and intermittent pressure pulses wherein the steam generator/boiler is drained to a water level just above a TSP identified as having excessive sludge deposits and/or particularly nonporous sludge known as collars and both thermal stress and high impact pressure pulses are used to dislodge the sludge and/or the collars with the process being repeated for all such TSP and the residue then flushed out by draining or using water lancing methods.

    摘要翻译: 本发明提供了一种使用热应力和间歇压力脉冲的组合从蒸汽发生器/锅炉管支撑板(TSP)除去污泥沉积物的方法,其中蒸汽发生器/锅炉被排出到刚好高于标称为具有 过量的污泥沉积物和/或特别是被称为套环的无孔污泥以及热应力和高冲击压力脉冲都被用于以所有这样的TSP重复该过程的方式驱除污泥和/或套环,然后残留物通过排水或 采用水刺方式。

    System and method for crevice cleaning in steam generators
    5.
    发明申请
    System and method for crevice cleaning in steam generators 审中-公开
    蒸汽发生器缝隙清洗系统及方法

    公开(公告)号:US20090183694A1

    公开(公告)日:2009-07-23

    申请号:US12009388

    申请日:2008-01-18

    摘要: A method is provided for cleaning crevices between a plurality of tubes and a plurality of tube support plates supporting the tubes in a steam generator. The steps include filling a secondary side of the steam generator with a solvent to a first level above a first tube support plate to be cleaned, draining the solvent to a second level lower than the first tube support plate, and refilling the secondary side of the steam generator with the solvent to a third level above the first tube support plate. A cleaning system is also provided.

    摘要翻译: 提供了一种清洁多个管和在蒸汽发生器中支撑管的多个管支撑板之间的缝隙的方法。 这些步骤包括用溶剂将蒸汽发生器的次级侧填充到待清洁的第一管支撑板上方的第一级,将溶剂排出到比第一管支撑板低的第二级,并且将第 具有溶剂的蒸汽发生器到第一管支撑板上方的第三级。 还提供清洁系统。

    Chemical cleaning of a steam generator during mode 5 generator shut down
    6.
    发明授权
    Chemical cleaning of a steam generator during mode 5 generator shut down 失效
    模式5发电机关闭时,蒸汽发生器的化学清洗

    公开(公告)号:US07302917B2

    公开(公告)日:2007-12-04

    申请号:US11212250

    申请日:2005-08-27

    IPC分类号: C23G1/00 F22B37/48

    CPC分类号: F22B37/483

    摘要: A Nuclear Steam Supply Stem (NSSS) Mode 5 Steam Generator Chemical Cleaning system is disclosed which applies chemical cleaning solvent (formulated to remove SG deposits) to the secondary side of the SG using primary side supplied heat during NSS Mode 5 shutdown to maintain the desired application temperature. Mixing is achieved via nitrogen sparging.

    摘要翻译: 核蒸汽供应阀(NSSS)模式5蒸汽发生器化学清洗系统被公开,其在NSS模式5关闭期间使用初级侧提供的热量将化学清洁溶剂(配制成去除SG沉积物)施加到SG的次级侧,以保持期望的 使用温度。 通过氮气喷射实现混合。