skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Review of corrosion in 10- and 14-ton mild steel depleted UF{sub 6} storage cylinders

Abstract

A literature review was conducted to determine the type, extent and severity of corrosion found in the 10- and 14-ton mild steel depleted UF{sub 6} storage cylinders. Also discussed in this review is corrosion found in the valves and plugs used in the cylinders. Corrosion of the cylinders is a gradual process which occurs slowly over time. Understanding corrosion of the cylinders is an important concern for long term storage of the UF{sub 6} in the cylinder yards, as well as the final disposition of the depleted UF{sub 6} tails inventory in the future. The following conclusions are made from the literature review: (1) The general external corrosion rate of the cylinders is about 1 to 2 mils per year (1 mil = 0.001{double_prime}). The highest general external corrosion rate was over 5 mpy on the 48G type cylinders. (2) General internal corrosion from the depleted UF{sub 6} is negligible under normal storage conditions. Crevice corrosion can occur at the cylinder/saddle interface from the retention of water in this area. Crevice corrosion can occur at the cylinder/skirt interface on the older skirted cylinders due to the lack of water drainage in this area. Crevice corrosion can occur on cylinders thatmore » have been in ground contact. Crevice corrosion and galvanic corrosion can occur where the stainless steel I.D. nameplates are attached to the cylinder. The packing nuts on the bronze one-inch valves used in the cylinders are susceptible to stress corrosion cracking (SCC). Mechanical damage from routine handling can lead to a breach in a cylinder with subsequent accelerated corrosion of the mild steel due to attack from HF and other UF{sub 6} hydrolysis by-products.« less

Authors:
Publication Date:
Research Org.:
Martin Marietta Energy Systems, Inc., Piketon, OH (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
120922
Report Number(s):
POEF-TS-02
ON: DE96000805; TRN: 95:007832
DOE Contract Number:  
AC05-76OR00001
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Aug 1995
Country of Publication:
United States
Language:
English
Subject:
05 NUCLEAR FUELS; URANIUM HEXAFLUORIDE; RADIOACTIVE WASTE STORAGE; CYLINDERS; CORROSION; STEEL-ASTM-A285; STEEL-ASTM-A516; PORTSMOUTH GASEOUS DIFFUSION PLANT

Citation Formats

Lykins, M L. Review of corrosion in 10- and 14-ton mild steel depleted UF{sub 6} storage cylinders. United States: N. p., 1995. Web. doi:10.2172/120922.
Lykins, M L. Review of corrosion in 10- and 14-ton mild steel depleted UF{sub 6} storage cylinders. United States. https://doi.org/10.2172/120922
Lykins, M L. Tue . "Review of corrosion in 10- and 14-ton mild steel depleted UF{sub 6} storage cylinders". United States. https://doi.org/10.2172/120922. https://www.osti.gov/servlets/purl/120922.
@article{osti_120922,
title = {Review of corrosion in 10- and 14-ton mild steel depleted UF{sub 6} storage cylinders},
author = {Lykins, M L},
abstractNote = {A literature review was conducted to determine the type, extent and severity of corrosion found in the 10- and 14-ton mild steel depleted UF{sub 6} storage cylinders. Also discussed in this review is corrosion found in the valves and plugs used in the cylinders. Corrosion of the cylinders is a gradual process which occurs slowly over time. Understanding corrosion of the cylinders is an important concern for long term storage of the UF{sub 6} in the cylinder yards, as well as the final disposition of the depleted UF{sub 6} tails inventory in the future. The following conclusions are made from the literature review: (1) The general external corrosion rate of the cylinders is about 1 to 2 mils per year (1 mil = 0.001{double_prime}). The highest general external corrosion rate was over 5 mpy on the 48G type cylinders. (2) General internal corrosion from the depleted UF{sub 6} is negligible under normal storage conditions. Crevice corrosion can occur at the cylinder/saddle interface from the retention of water in this area. Crevice corrosion can occur at the cylinder/skirt interface on the older skirted cylinders due to the lack of water drainage in this area. Crevice corrosion can occur on cylinders that have been in ground contact. Crevice corrosion and galvanic corrosion can occur where the stainless steel I.D. nameplates are attached to the cylinder. The packing nuts on the bronze one-inch valves used in the cylinders are susceptible to stress corrosion cracking (SCC). Mechanical damage from routine handling can lead to a breach in a cylinder with subsequent accelerated corrosion of the mild steel due to attack from HF and other UF{sub 6} hydrolysis by-products.},
doi = {10.2172/120922},
url = {https://www.osti.gov/biblio/120922}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {8}
}