Materials Performance

SEP 2018

Materials Performance is the world's most widely circulated magazine dedicated to corrosion prevention and control. MP provides information about the latest corrosion control technologies and practical applications for every industry and environment.

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Need reprints of MP ads, articles, or covers? REPRINTS ARE A GREAT INVESTMENT! Professionally printed reprints and photo copied reprints of all MP ads, articles, and covers are available for purchase. Reprints can be customized with your company's logo, additional product information, or the magazine cover—with no limits on creativity! Order your reprints today; it simply makes good business sense! For reprint information and rates, call +1 281 228 6287. 16 SEPTEMBER 2018 W W W.MATERIALSPERFORMANCE.COM MATERIAL MATTERS Though investigators did not pinpoint a precise cause for that thinning, the report notes that moisture can f low through and/or around the concrete foundation and near the tanks because there is no key way or water stop bet ween the shell and foundation. This exposes the secondar y steel containment liner to moisture. The concrete foundation also contains drains to a sump system. In the short term, the next steps include evaluating the effectiveness of corrosion inhibitors and examining methods to protect the outer shell exteri- ors from water intrusion and humidity, the report says. Core chemistry samples will be collected more frequently to ana- lyze waste at the bottom of tanks judged to be most at risk. To address these issues more specif i- cally and receive feedback, the site has a tank integrity expert panel comprised of experts from a variety of private and U.S. government organizations, including national laboratories. The panel meets at least once a year; and at these meetings, panelists provide independent advice and recommendations on existing and emerg- ing tank integrity issues. The panel is also evaluating potential tank repair tech- niques for localized areas of corrosion. The most recent meeting was held June 27-28, 2018, and another is expected before the end of this year. Source: Hanford Site, www.hanford.gov. References 1 "Hanford Site," Wikipedia, the free encyclope- dia, https://en.wikipedia.org/wiki/Hanford_ Site ( July 18, 2018). 2 "Retrieval Activities Completed in Double- Shell Tank AY-102," Office of River Protection Newsroom , March 8, 2017, https://www. hanford.gov/c.cfm/media/attachments.cfm/ ORP/AY-102_retrieval_complete.pdf ( July 18, 2018). 3 "Hanford Tank Integrity Presentation," Han- ford Advisory Board Tank Waste Committee, June 19, 2018, https://www.hanford.gov/files. cfm/Tank_Integrity_Presentation.pdf ( July 18, 2018). —Ben DuBose Material Matters continues on p. 17, following the special NACE International 75th anniversary section. Continued f rom page 15

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