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Title: NDE to Manage Atmospheric SCC in Canisters for Dry Storage of Spent Fuel: An Assessment

Abstract

This report documents efforts to assess representative horizontal (Transuclear NUHOMS®) and vertical (Holtec HI-STORM) storage systems for the implementation of non-destructive examination (NDE) methods or techniques to manage atmospheric stress corrosion cracking (SCC) in canisters for dry storage of used nuclear fuel. The assessment is conducted by assessing accessibility and deployment, environmental compatibility, and applicability of NDE methods. A recommendation of this assessment is to focus on bulk ultrasonic and eddy current techniques for direct canister monitoring of atmospheric SCC. This assessment also highlights canister regions that may be most vulnerable to atmospheric SCC to guide the use of bulk ultrasonic and eddy current examinations. An assessment of accessibility also identifies canister regions that are easiest and more difficult to access through the ventilation paths of the concrete shielding modules. A conceivable sampling strategy for canister inspections is to sample only the easiest to access portions of vulnerable regions. There are aspects to performing an NDE inspection of dry canister storage system (DCSS) canisters for atmospheric SCC that have not been addressed in previous performance studies. These aspects provide the basis for recommendations of future efforts to determine the capability and performance of eddy current and bulk ultrasonic examinations formore » atmospheric SCC in DCSS canisters. Finally, other important areas of investigation are identified including the development of instrumented surveillance specimens to identify when conditions are conducive for atmospheric SCC, characterization of atmospheric SCC morphology, and an assessment of air flow patterns over canister surfaces and their influence on chloride deposition.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1183635
Report Number(s):
PNNL-22495
401001060
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
NDE; stress corrosion cracking; dry storage canisters

Citation Formats

Meyer, Ryan M., Pardini, Allan F., Cuta, Judith M., Adkins, Harold E., Casella, Andrew M., Qiao, Hong, Larche, Michael R., Diaz, Aaron A., and Doctor, Steven R. NDE to Manage Atmospheric SCC in Canisters for Dry Storage of Spent Fuel: An Assessment. United States: N. p., 2013. Web. doi:10.2172/1183635.
Meyer, Ryan M., Pardini, Allan F., Cuta, Judith M., Adkins, Harold E., Casella, Andrew M., Qiao, Hong, Larche, Michael R., Diaz, Aaron A., & Doctor, Steven R. NDE to Manage Atmospheric SCC in Canisters for Dry Storage of Spent Fuel: An Assessment. United States. https://doi.org/10.2172/1183635
Meyer, Ryan M., Pardini, Allan F., Cuta, Judith M., Adkins, Harold E., Casella, Andrew M., Qiao, Hong, Larche, Michael R., Diaz, Aaron A., and Doctor, Steven R. 2013. "NDE to Manage Atmospheric SCC in Canisters for Dry Storage of Spent Fuel: An Assessment". United States. https://doi.org/10.2172/1183635. https://www.osti.gov/servlets/purl/1183635.
@article{osti_1183635,
title = {NDE to Manage Atmospheric SCC in Canisters for Dry Storage of Spent Fuel: An Assessment},
author = {Meyer, Ryan M. and Pardini, Allan F. and Cuta, Judith M. and Adkins, Harold E. and Casella, Andrew M. and Qiao, Hong and Larche, Michael R. and Diaz, Aaron A. and Doctor, Steven R.},
abstractNote = {This report documents efforts to assess representative horizontal (Transuclear NUHOMS®) and vertical (Holtec HI-STORM) storage systems for the implementation of non-destructive examination (NDE) methods or techniques to manage atmospheric stress corrosion cracking (SCC) in canisters for dry storage of used nuclear fuel. The assessment is conducted by assessing accessibility and deployment, environmental compatibility, and applicability of NDE methods. A recommendation of this assessment is to focus on bulk ultrasonic and eddy current techniques for direct canister monitoring of atmospheric SCC. This assessment also highlights canister regions that may be most vulnerable to atmospheric SCC to guide the use of bulk ultrasonic and eddy current examinations. An assessment of accessibility also identifies canister regions that are easiest and more difficult to access through the ventilation paths of the concrete shielding modules. A conceivable sampling strategy for canister inspections is to sample only the easiest to access portions of vulnerable regions. There are aspects to performing an NDE inspection of dry canister storage system (DCSS) canisters for atmospheric SCC that have not been addressed in previous performance studies. These aspects provide the basis for recommendations of future efforts to determine the capability and performance of eddy current and bulk ultrasonic examinations for atmospheric SCC in DCSS canisters. Finally, other important areas of investigation are identified including the development of instrumented surveillance specimens to identify when conditions are conducive for atmospheric SCC, characterization of atmospheric SCC morphology, and an assessment of air flow patterns over canister surfaces and their influence on chloride deposition.},
doi = {10.2172/1183635},
url = {https://www.osti.gov/biblio/1183635}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Sep 01 00:00:00 EDT 2013},
month = {Sun Sep 01 00:00:00 EDT 2013}
}