Menu
Search
Filters
Close
Menu

51318-11005-Evaluation and Repair of Natural Draft Cooling Towers

Picture for Evaluation and Repair of Natural Draft Cooling Towers
Available for download

A case history is presented to illustrate how assessment data was collected, interpreted, and used to develop and implement repair strategies for two 400 foot (121 m) tall hyperbolic shell cooling towers exhibiting widespread corrosion-induced deterioration.

 

Product Number: 51318-11005-SG
Author: M. Gries / K. Michols / J. Lawler / D. Whitmore / M. Miltenberger
Publication Date: 2018
Industry: Energy Generation
$0.00
$20.00
$20.00

Reinforced concrete cooling towers exposed to harsh operating environments can develop severe corrosion of embedded steel reinforcing, concrete delamination and spalling. Condition assessment of cooling towers is challenging due to their size, geometry and operational constraints but careful investigation can provide critical knowledge to effectively characterize structural health, plan maintenance, and prioritize repairs to maximize service life. A case history is presented to illustrate how assessment data was collected, interpreted, and used to develop and implement repair strategies for two 400 foot (121 m) tall hyperbolic shell cooling towers exhibiting widespread corrosion-induced deterioration. Evaluation of concrete properties, corrosion rate and desired service-life objectives were considered in the decision to utilize impressed current cathodic protection (ICCP) and galvanic cathodic protection (GCP) as part of the repair program. Review of the design and installation of the ICCP and GCP systems highlight the unique challenges associated with repair and protection of reinforced concrete cooling towers.

Key words: Natural Draft Cooling Towers, Reinforced Concrete, Concrete Assessment, Concrete Repair, Alkali-Silica Reaction, Petrography, Service Life Modeling, Impressed Current Cathodic Protection, Galvanic Cathodic Protection

 

Reinforced concrete cooling towers exposed to harsh operating environments can develop severe corrosion of embedded steel reinforcing, concrete delamination and spalling. Condition assessment of cooling towers is challenging due to their size, geometry and operational constraints but careful investigation can provide critical knowledge to effectively characterize structural health, plan maintenance, and prioritize repairs to maximize service life. A case history is presented to illustrate how assessment data was collected, interpreted, and used to develop and implement repair strategies for two 400 foot (121 m) tall hyperbolic shell cooling towers exhibiting widespread corrosion-induced deterioration. Evaluation of concrete properties, corrosion rate and desired service-life objectives were considered in the decision to utilize impressed current cathodic protection (ICCP) and galvanic cathodic protection (GCP) as part of the repair program. Review of the design and installation of the ICCP and GCP systems highlight the unique challenges associated with repair and protection of reinforced concrete cooling towers.

Key words: Natural Draft Cooling Towers, Reinforced Concrete, Concrete Assessment, Concrete Repair, Alkali-Silica Reaction, Petrography, Service Life Modeling, Impressed Current Cathodic Protection, Galvanic Cathodic Protection

 

Product tags
Also Purchased
Picture for The Passive Film Evolution of Carbon Steel in Hanford Waste Simulants
Available for download

51318-11016-The Passive Film Evolution of Carbon Steel in Hanford Waste Simulants

Product Number: 51318-11016-SG
Author: K. J. Evans / S. Chawla / K.M. Sherer / K. D. Boomer
Publication Date: 2018
$20.00

Nuclear wastes are stored in large carbon steel storage tanks. Carbon steels can become susceptible to localized corrosion and stress corrosion cracking. Results of ongoing electrochemical tests to understand effects of a maturing passive film on the corrosion.
Picture for Frequency dependence in AC Harmonic Interference to Pipelines
Available for download

51318-11004-Frequency dependence in AC Harmonic Interference to Pipelines

Product Number: 51318-11004-SG
Author: L. Trichtchenko / D.H. Boteler
Publication Date: 2018
$20.00

Frequency dependence of the phase relation of the power line currents (which contain harmonics of the fundamental AC frequency), the Earth response, and the pipeline response & how they can be combined to provide an AC risk assessment.
Picture for Amine base Vapor Phase Corrosion inhibitor Alternatives to Hydrazine for Steam generating system and Powwr Plants
Available for download

51318-11012-Amine base Vapor Phase Corrosion inhibitor Alternatives to Hydrazine for Steam generating system and

Product Number: 51318-11012-SG
Author: Behzad Bavarian / Lisa Reiner / James Holden / Boris Miksic
Publication Date: 2018
$20.00

Hydrazine is used as an oxygen scavenger to control corrosion in steam generating systems, despite being a genotoxic carcinogen. This investigation confirmed an Amine Base Vapor Phase Corrosion Inhibitor can be an effective replacement for toxic hydrazine.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support