CHEMICAL DECONTAMINATION OF THE ANL-2 HIGH-PRESSURE WATER LOOP

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The chemical decontamination of the ANL-2 Highpressure Water Loop at the MTR is described. A mixture of sodium hydroxide and potassium permanganate was first applied to oxidize partially and loosen the magnetite corrosion film on the loop surfaces. Next, the system was treated with a solution of Versenol 120 to remove and suspend the loosened oxide film. The third chemical treatment was a mixture of sulfamic acid, HEDTA, hydrazine, and Rodine 80. After the first two chemical treatments a brown residue remained, which was presumed to be manganese dioxide. The third solution completely removed all traces of residue from the ... continued below

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12 p.

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Crothers, C.C. July 1, 1960.

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Description

The chemical decontamination of the ANL-2 Highpressure Water Loop at the MTR is described. A mixture of sodium hydroxide and potassium permanganate was first applied to oxidize partially and loosen the magnetite corrosion film on the loop surfaces. Next, the system was treated with a solution of Versenol 120 to remove and suspend the loosened oxide film. The third chemical treatment was a mixture of sulfamic acid, HEDTA, hydrazine, and Rodine 80. After the first two chemical treatments a brown residue remained, which was presumed to be manganese dioxide. The third solution completely removed all traces of residue from the first two treatments. After a delay of one MTR fuel cycle (three weeks) due to mechanical difficulties, the loop was operated for approximately 300 hours at 420 deg F and 380 psig with excess hydrogen to passivate the loop surfaces. Approximately 70% of the corrosion film was removed from the loop surfaces as a result of the chemical decontamination. (auth)

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12 p.

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  • Other Information: Orig. Receipt Date: 31-DEC-60

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  • Report No.: ANL-6151
  • Grant Number: W-31-109-ENG-38
  • DOI: 10.2172/4157050 | External Link
  • Office of Scientific & Technical Information Report Number: 4157050
  • Archival Resource Key: ark:/67531/metadc867286

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  • July 1, 1960

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  • Sept. 16, 2016, 12:32 a.m.

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  • Oct. 11, 2017, 3:25 p.m.

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Crothers, C.C. CHEMICAL DECONTAMINATION OF THE ANL-2 HIGH-PRESSURE WATER LOOP, report, July 1, 1960; Illinois. (digital.library.unt.edu/ark:/67531/metadc867286/: accessed June 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.