A tube cleaning system and method including a nozzle holder operable to secure nozzles in a nozzle arrangement, the nozzle arrangement corresponding to an arrangement of tubes of a tube bundle, and a nozzle positioning system operable to move the nozzle holder and nozzles secured therein, to cause the nozzles to engage a set of tubes of the tubes of the tube bundle, the nozzles configured to direct cleaning fluid into the set of tubes.

A cleaning system includes an explosive subsystem including: a plurality of detonation cords extending along a direction different from a vertical direction; and a locating assembly locating the plurality of detonation cords relative to each other. The locating assembly spaces each of the detonation cords apart from a system to be cleaned. The cleaning system includes a pressurized air blower assembly adjacent a portion of the system to be cleaned, the pressurized air blower assembly being configured to direct pressurized air towards the portion of the system to be cleaned after the detonation cords have been exploded.

A sludge lance system for cleaning a tube bundle of a steam generator is disclosed. The sludge lance system comprises a mount, an index drive, and a sludge lance comprising a longitudinal rail, a manifold, an oscillator assembly, and a distal head. The oscillator assembly comprises a rotary output shaft. The distal head comprises a body portion, a first nozzle body on a first side of the distal head, and a second nozzle body on a second side of the distal head opposite the first side. The first nozzle body is rotatable relative to the body portion about a first longitudinal axis in a first direction in response to a rotation of the rotary output shaft. The second nozzle body is rotatable relative to the body portion about a second longitudinal axis in a second direction opposite the first direction in response to the rotation of the rotary output shaft.

An apparatus for sensing an obstruction within a tube being cleaned and repetitively advancing and retracting a flexible high pressure fluid cleaning lance within the tube is disclosed. The apparatus monitors drive roller/belt position and actual hose position, compares the belt (expected travel) to hose position (travel) and generates a position difference, or mismatch. If the mismatch is above a predetermined level, the drive motor direction is reversed for a predetermined time interval, and forward operation restored after the predetermined time interval; and the sequence of repeating the reversing and restoring operations is continued until the position difference or mismatch no longer exceeds the predetermined difference threshold.

Disclosed is a multi-directional jet cleaning apparatus for a steam generator, comprising a frame assembly, a transmission assembly, a first nozzle assembly, a second nozzle assembly. and a motor assembly. The transmission assembly comprises a primary transmission mechanism, a secondary transmission mechanism, a second nozzle transmission mechanism, and a synchronous belt. The motor assembly is used to drive the primary transmission mechanism to rotate. The second nozzle assembly is located on the second nozzle transmission assembly, and the first nozzle assembly is located on the primary transmission mechanism and/or the secondary transmission mechanism. The frame assembly comprises an upper cover and a lower cover, the first nozzle assembly and the second nozzle assembly being located on the lower cover, a water flow channel being provided in the lower cover, and the water flow channel being in communication with the second nozzle assembly and the first nozzle assembly.