Toughness characterization of materials for nuclear transport casks

Technical Report · Sun Dec 01 04:00:00 EST 1991

OSTI ID:5616430

Anderson, T L; Lambert, A M ^[1]

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1. Texas A and M Univ., College Station, TX (United States). Research Foundation

The United States Nuclear Regulatory Commission (NRC) has drafted guidelines for the fracture toughness of ferritic steels for nuclear transport casks. These draft guidelines specify extremely low nil-ductility transition temperature (NDTT) levels, ranging from {minus}120{degree}F for A 350-LF3 steel to {minus}158{degree}F for A 508-4A steel. However, the guidelines do not specify the heat treatment or where the test specimens should be extracted when a thick section is being evaluated. The toughness could vary significantly with heat treatment and through the thickness of a heavy section. Also, when the cask is welded, the weld metal and heat-affected zone may have vastly different properties from the parent metal. In a previous study, Sandia National Laboratories asked Texas A M University to evaluate the effect of position in thickness on the mechanical properties and microstructure of several materials. The present investigation is a follow-up to the prior work; one of the forgings from the previous study has been tested with a different heat treatment, and a weldment made from another forging has been characterized. This report summarizes the results of both programs.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States); Texas A and M Univ., College Station, TX (United States). Research Foundation
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5616430
• Report Number(s): SAND-90-7077; ON: DE92008456
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
42 ENGINEERING
420204 -- Engineering-- Shipping Containers
420500* -- Engineering-- Materials Testing
ALLOYS
CASKS
CHARPY TEST
CHEMICAL ANALYSIS
CONTAINERS
CRYSTAL STRUCTURE
DESTRUCTIVE TESTING
FERRITIC STEELS
FRACTURE PROPERTIES
HEAT TREATMENTS
IMPACT SHOCK
IMPACT TESTS
IRON ALLOYS
IRON BASE ALLOYS
JOINTS
MANAGEMENT
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
METALLOGRAPHY
MICROSTRUCTURE
STEELS
TESTING
TRANSPORT
WASTE MANAGEMENT
WASTE TRANSPORTATION
WELDED JOINTS