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Title: Hanford Double Shell Waste Tank Corrosion Studies - Final Report FY2015

During FY15, SRNL performed corrosion testing that supported Washington River Protection Solutions (WRPS) with their double shell tank (DST) integrity program. The testing investigated six concerns including, 1) the possibility of corrosion of the exterior of the secondary tank wall; 2) the effect of ammonia on vapor space corrosion (VSC) above waste simulants; 3) the determination of the minimum required nitrite and hydroxide concentrations that prevent pitting in concentrated nitrate solutions (i.e., waste buffering); 4) the susceptibility to liquid air interface (LAI) corrosion at proposed stress corrosion cracking (SCC) inhibitor concentrations; 5) the susceptibility of carbon steel to pitting in dilute solutions that contain significant quantities of chloride and sulfate; and 6) the effect of different heats of A537 carbon steel on the corrosion response. For task 1, 2, and 4, the effect of heat treating and/ or welding of the materials was also investigated.
Authors:
 [1] ;  [1]
  1. Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)
Publication Date:
OSTI Identifier:
1262318
Report Number(s):
SRNL-STI--2016-00117
TRN: US1601598
DOE Contract Number:
DE-AC09-08SR22470
Resource Type:
Technical Report
Research Org:
Savannah River Site (SRS), Aiken, SC (United States)
Sponsoring Org:
USDOE Office of Environmental Management (EM)
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 36 MATERIALS SCIENCE; PITTING CORROSION; STRESS CORROSION; CARBON STEELS; SOLUTIONS; TANKS; CONCENTRATION RATIO; AMMONIA; CRACKS; AIR; CHLORIDES; SHELLS; WELDING; ABUNDANCE; HYDROXIDES; LIQUIDS; NITRATES; NITRITES; SULFATES; TESTING; BUFFERS; INTERFACES; CORROSION INHIBITORS; WALLS; RADIOACTIVE WASTE STORAGE Hanford; double-shell tanks; vapor space corrosion; liquid air interface corrosion; pitting protocol; waste buffering