Survey of degradation modes of candidate materials for high-level radioactive-waste disposal containers; Overview

Farmer, J.C.; McCright, R.D.; Kass, J.N.

doi:10.2172/137650

Cited by 5 publications

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“…A degradation mode survey was published in February 1990 (Farmer, 1990). This report consisted of 8 bound volumes and an overview containing approximately 1200 relevant publications.…”

Section: Characteristics and Behavior Of Disposal-container Materialsmentioning

confidence: 99%

Progress report No. 2 on the Scientific Investigation Program for the Nevada Yucca Mountain Site, October 1, 1989--March 31, 1990

1990

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This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. DISCLAIMER Portions of this document may be illegible in electronic image products. Images are produced from the best available original document. FOREWORD In accordance with the requirements of Section October 1, 1989, through March 31, 1990. This 113(b)(3) of the Nuclear Waste Policy Act of progress report is the second of a series of 1982 (Pub. L. No. 97-429, as amended, the US. reports that are issued at intervals of Department of Energy has prepared this report approximately six months during scientific on the progress of scientific investigation activities investigation. The first progress report was issued at Yucca Mountain in southern Nevada from in February 1990 (DOE, 199Oc).

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“…A degradation mode survey was published in February 1990 (Farmer, 1990). This report consisted of 8 bound volumes and an overview containing approximately 1200 relevant publications.…”

Section: Characteristics and Behavior Of Disposal-container Materialsmentioning

confidence: 99%

Progress report No. 2 on the Scientific Investigation Program for the Nevada Yucca Mountain Site, October 1, 1989--March 31, 1990

1990

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“…There is farr,iiy [3,4]. Tables 4 and 5 show these rankings a significant difference in thermal power loading for resistance to various forms of corrosion.…”

Section: Introduction Two Types Of High-level Radioactive-wastementioning

confidence: 98%

Corrosion models for predictions of performance of high-level radioactive-waste containers

Farmer¹,

McCright

Gdowski³

1991

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Corrosion Aspects of Copper in a Crystalline Bedrock Environment - with Regard to Life Prediction of a Container in a Nuclear Waste Repository

Sjöblom

1994

Application of Accelerated Corrosion Tests to Service Life Prediction of Materials

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A disposal system for high-level and long-lived radioactive waste should provide for adequate isolation of radionuclides from the bio-sphere. During the work of finding such a system, and in demonstrating its long-term isolation, certain unprecedented requirements become apparent: the disposal system must function over very long times without any need for maintenance or repair. Furthermore, no experience from operation can be made available for the analysis, and there will be no results from tests with durations comparable in magnitude to the life-time of the facility. In the systems studied in Sweden and Finland, copper containers are deposited in crystalline bedrock with bentonite as a backfill. The groundwater is reducing and the flow is very low due to the low permeability of the bentonite clay and of the rock near the deposition hole. The chemical durability of a container in such a disposal system will depend primarily on three factors: the mechanical tensile stresses in the container, the chemical environment, and the copper material itself. The tensile stresses depend on manufacturing factors as well as external forces. The chemical environment will depend on the composition of the groundwater, theibentonite clay and possibly also phenomena that might take place in the vicinity of the container. The copper material can corrode primarily by oxidation or sulphidation. If the salt concentration is high (and a reducible specie is available), copper may also react by forming chloride complexes. If the copper container has thick walls, penetration by general corrosion will take considerable time. It is nevertheless of interest to study general corrosion since - at least under certain conditions - it will give rise to a protective and passivating surface layer. Such a layer may be of significance when the possibilities of localized corrosion and stress corrosion cracking are to be evaluated. It is pointed out that the development of localized corrosion is strongly dependent on the specific chemistry. Concern is expressed regarding certain treacherous aspects of stress corrosion cracking. Areas of research that may be fertile to pursue have also been identified. A point is made that the safety analyses and scenarios should include both probable and less probable developments. Examples are given of the latter type. A suggestion is made that samples of the container and of container material be left in the repository to enable evaluation and thus to facilitate improvements that future generations might wish to make.

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Survey of degradation modes of candidate materials for high-level radioactive-waste disposal containers; Overview

Cited by 5 publications

References 5 publications

Progress report No. 2 on the Scientific Investigation Program for the Nevada Yucca Mountain Site, October 1, 1989--March 31, 1990

Progress report No. 2 on the Scientific Investigation Program for the Nevada Yucca Mountain Site, October 1, 1989--March 31, 1990

Corrosion models for predictions of performance of high-level radioactive-waste containers

Corrosion Aspects of Copper in a Crystalline Bedrock Environment - with Regard to Life Prediction of a Container in a Nuclear Waste Repository

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