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sludge lancing system for steam generator

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Steam Generator Secondary Side Water Lancing

Steam Generator Secondary Side Water Lancing Westinghouse sludge lancing systems effectively and efficiently remove accumulated sludge on tubesheet surfaces for both square and triangular-pitched SGs. With more than 30 years of sludge lancing design and operations experience, Westinghouse offers proven solutions for a broad range of site

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Sludge Lancing Equipment (SLE)

13.6 SLUDGE LANCING EQUIPMENT (SLE) Periodic sludge lancing enhances steam generator life by mitigating corrosion between its tubes and tube sheet. The present modular sludge lancing equipment has been designed to dislodge and remove sludge from secondary side of tube sheet of mushroom type steam generators of PHWRs. This equipment comprises of.

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Sludge/Deposit Lancing Home Framatome

This high-pressure system for square or triangular pitch steam generators enables fixed water jets to maintain tight water columns that penetrate completely through the SG tube bundle. This process transfers all of the energy to locations containing the most sludge and effectively removes hard collars.

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Sludge Lancing BWX Technologies, Inc. People Strong

In the past two decades BWXT has deployed equipment and services for tube sheet and tube support cleaning in more than 70 deployments in 380 Steam Generators. BWXT currently designs and builds customized lancing systems to meet the needs of nuclear steam genera¬tors worldwide.

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SLUDGE LANCING SYSTEM Avocado Engineering

Mar 01, 2019 Suction module equipped with a suitable pumping system of diaphragm pumps to remove the water and slurry from the steam generator during washing operation; Filtration module to trap the sludge removed from the steam generator by a train of filters, for example 10 micron, 5 micron and 0.5 micron threshold.

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Modular Sludge Lancing Equipment for Mushroom Type

Periodic sludge lancing enhances steam generator life by mitigating corrosion between its tubes and tube sheet. The present modular sludge lancing equipment has been designed to dislodge and remove sludge from secondary side of tube sheet of mushroom type steam generators of PHWRs.

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Steam generator lancing system Free Patents Online

Sep 29, 1998 BACKGROUND OF THE INVENTION (1) Field of the Invention . The present invention relates generally to equipment for cleaning steam generators and, more particularly, to a high pressure fluid lancing system for cleaning sludge off of the tubesheets and tubes of the steam generators.

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CECIL (Consolidated Edison Combined By

These issues require a need for a system that can access the tube bundle interior, remove sludge without damaging tubes, identify and remove foreign objects, and at the same time reduce personnel exposure to radiation. _____ CECIL (Consolidated Edison Combined Inspection and Lancing) is a robotic steam generator maintenance system developed

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Waterlancing for CANDUSteam Generators

demonstration lancing of one steam generator at Pickering'A'(Unit1, Boiler 3). Theentireprogramwas completed on 7 February 1986, meeting a very tight schedule, considering the uniqueness of the devices required. The Pickering 'A'Lance Design The Pickering 'A' steam generator lancing system employed a standard mobile unit, with control con­

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Steam Generator Tube Inspection and Foreign Object

In steam generator with many years of operation, • Equipment access restriction due to hard sludge • Difficult to access for foreign objects inspection • ECT Detectivity effect : Co-existence of non-contact non-magnetic foreign objects and sedimentary sludge Effect of Foreign Object remaining between tubes

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Steam generator sludge control by means of a passive

A sludge collection system is described for a vertically oriented nuclear steam generator wherein vapors produced in the steam generator pass through means for separating entrained liquid from the vapor prior to the vapor being discharged from the steam generator.

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NRC INSPECTION MANUAL

02.07 Sludge Lancing. Review the sludge lancing history to determine whether the licensee has maintained an ongoing program for removing sludge from the steam generators. Review the following subjects: a. The quantity of sludge that was removed in refueling outages by lancing the steam generator tube sheets. b.

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CA1053096A Steam generator sludge removal system

STEAM GENERATOR SLUDGE REMOVAL SYSTEM ABSTRACT OF THE DISCLOSURE A system for removing sludge that may be deposited on a tube sheet of a steam generator. Headers are arranged at the elevation of the sludge to be removed establishing a circumferential fluid stream at that elevation.

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US4715324A Nuclear steam generator sludge lancing method

A method and apparatus for removing from the tube sheet and transfer tubes of a nuclear steam generator sludge deposits which occur from the use of all volatile treatment water chemistry. A continuously activated suction apparatus maintains at a low level the water/sludge

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Volume 3 Canada

figure for steam generator cleanliness over the long term. • The standardization by indexing the parametres allow a cross comparison among different plants. • The success of cleaning measures can be verified. • Steam generator cleanliness offers the perspective for plant life time extension.

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Maanshan Unit 2 Steam Generator Water Level Oscillation

Maanshan Unit 2 Steam Generator cleaning was effective by visual inspection results and comparing the amount of sludge removed at EOC-15 with previous outages. Most of the quatrefoil deposits causing water level oscillations have been removed from all 3 SGs. Unit 2 returns to full power operation after restart as expected.

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STEAM GENERATOR DUAL HEAD SLUDGE LANCE

Aug 09, 2018 What is claimed is: 1. A moveable sludge lance system having a sludge lance for use in cleaning a tube bundle in a tubular steam generator by travel in an elongated, center tube lane having a midpoint center stay rod in the center of the center tube lane and an axis extending along the elongated dimension, said sludge lance comprising: a support carriage moveable in the axial direction along

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Improved Analytical Analysis of a Pressurized Water

prevent buildup of corrosion products, PWR’s primarily utilize the steam generator blowdown system in which a portion of the water from the steam generator secondary side is removed clean-up methods include sludge lancing, bundle flushing, crevice flushing, chemical soaks,

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FOULING OF STEAM GENERATOR TUBES IN NUCLEAR

FOULING OF STEAM GENERATOR TUBES IN NUCLEAR POWER PLANTS: LABORATORY TESTS TO REPRODUCE OXIDES DEPOSITION C. Goujon1,2, T. Pauport mechanical methods such as sludge lancing (Hur et al., 2003). That is why chemical cleanings, started in 1989, have

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Westinghouse Nuclear > Operating Plants > Outage Services

Committed to the long-term operation of PWR steam generators. Westinghouse has been providing premier, customer-focused steam generator (SG) services for plants worldwide for more than 45 years.Our vast industry experience, full scope service offerings and excellence in resolution of emergent issues makes us uniquely qualified to execute SG services at your plant.

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CECIL Robotic Steam Generator Maintenance System

Steam Generator Maintenance CECIL (Consolidated Edison Combined Inspection and Lancing) is a robotic steam generator maintenance system that provides secondary side maintenance. The CECIL robot is remotely operated and can perform secondary side visual inspections, soft and hard sludge removal, sludge sampling, and both in-bundle and annulus

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Pressure pulses aid steam generator cleaning Power

A total of 15 percent of the solids removed from Unit 1 steam generators and 16 percent removed from Unit 2 steam generators was extracted during sludge lancing following PP/CC.

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Steam Generator Mechanical Cleaning Hard and Soft Sludge

The effectiveness of the sludge lancing process can be increased by applying upper bundle flushing resulting in a higher total amount of removed deposits. For optimized hard sludge removal of hard deposit accumulated of longer periods of time we provide

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SLUDGE LANCING SYSTEM HIGH PRESSURE WATER

An example of the sludge lancing system for water jetting of the steam generators can be composed of the following modules: 1- High pressure pumping module with for example a pressure of 420 bar and a flow rate of a 140 lpm; 2- Stainless steel storage tank to feed the HP pump module;

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CECIL Robotic Steam Generator Maintenance System

CECIL is an advanced steam generator secondary side maintenance system. The CECIL robot is remotely operated and can perform secondary side visual inspections, soft and hard sludge removal, sludge sampling, and both in-bundle and annulus foreign object search and retrieval (FOSAR). The key to CECIL's success is its ability to access the entire in-bundle area of the tubesheet.

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Pressure pulses aid steam generator cleaning Power

A total of 15 percent of the solids removed from Unit 1 steam generators and 16 percent removed from Unit 2 steam generators was extracted during sludge lancing following PP/CC.

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Steam Generator Mechanical Cleaning Hard and Soft Sludge

The effectiveness of the sludge lancing process can be increased by applying upper bundle flushing resulting in a higher total amount of removed deposits. For optimized hard sludge removal of hard deposit accumulated of longer periods of time we provide

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SLUDGE LANCING SYSTEM HIGH PRESSURE WATER

design and manufacturing of the complete packages of the high pressure water jetting (also known as high pressure water blasting), which is an important industrial solution for efficient washing and cleaning of the industrial equipment such as shell/tube steam generators. The complete package is also known as the Sludge Lancing System, where

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US Patent for Steam generator dual head sludge lance

A moveable sludge lance (76) said moveable sludge lance having duel lance heads (77, 79) passed through handholes (62) in the side of a nuclear steam generator and into a central tube lane (60) having a central stay rod (61) which cleans with high pressure fluid through the row 1 tubes (85) in the tube lane, where the distance (200) between the dual lance heads (77, 79) is wide enough to allow

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Steam Generator Services BWX Technologies, Inc. People

Specializing in diagnosing and servicing a variety of Steam Generator and Heat Exchanger issues with services including sludge lancing, tube plugging and removal. Our rapid plugging system, delivered using the ZR-100 robot, reduce equipment requirements and speed delivery.

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Benjamin D. Fisher Technical Fellow BWX Technologies

View Benjamin D. Fisher’s profile on LinkedIn, the world's largest professional community. Techniques used to deploy triple angle Sludge Lancing systems in Nuclear Steam Generators

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US Patent Application for STEAM GENERATOR DUAL HEAD SLUDGE

A moveable sludge lance said moveable sludge lance having duel lance heads passed through handholes in the side of a nuclear steam generator and into a central tube lane having a central stay rod which cleans with high pressure fluid through the row 1 tubes in the tube lane, where the distance between the dual lance heads is wide enough to allow the dual lance heads to extend beyond the

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Information Notice 2001-16: Recent Foreign and Domestic

May 22, 2015 An evaluation determined that the sludge-lancing technique damaged the steam generator tubes. In 1997, a previously used sludge lancing technique was modified to improve tubesheet cleaning and allow longer intervals between lancing operations.

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CECIL: A robot for secondary-side maintenance of PWR steam

Abstract. This report describes the development of a teleoperated robot named CECIL, the Consolidated Edison Combined Inspection and Lancing system for PWR steam generators, from the original evaluation of conventional sludge lancing techniques to the conceptualization of the intertube lancing

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Deposit formation in PWR steam generators vtt.fi

impurities can change inside the steam generator as feed water boils to produce steam [1]. Such transformations could be: xParticulate impurities can agglomerate, coalesce or grow to form sediment like deposits known as sludge. The large sludge particles settle toward the bottom of the steam generator and collect as piles on the horizontal

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Sludge Lancing eichrom

of steam generators and must be removed to prevent pitting, intergranular stress corrosion cracking and other forms of tube degradation. During the sludge lancing process, work is performed using the highly radioactive hand holes, and workers spend a significant amount of time in close proximity to the generator’s outer surface.

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Improvements in PWR steam generator sludge lancing

Room reservation. TIB Conti-Campus: group study rooms with whiteboards; TIB Conti-Campus: parent-child workroom; TIB Conti-Campus: dual workstations

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Design and development of robotic automation and process

Dec 17, 2006 Hard sludge deposits formed Design and development of robotic automation and process controls for the water jet lancing system of nuclear power plant steam generators Abstract: Steam generators are critical components of a nuclear power plant and play an important role in the availability of the plant. Hard sludge deposits formed in the

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