Published February 1977 | Version v1
Report Restricted

Evaluation of design safety factors for time-dependent buckling

Creators

Description

The ASME Boiler and Pressure Vessel Code rules concerning time-dependent (creep) buckling for Class 1 nuclear components have recently been changed. Previous requirements for a factor of ten on service life have been replaced with a factor of safety of 1.5 on loading for load-controlled buckling. This report examines the supposed equivalence of the two rules from the standpoint of materials behavior--specifically, the secondary creep strain rate exponent. The comparison is made using results obtained numerically for an axially-loaded, cylindrical shell with varying secondary creep exponents. A computationally efficient scheme for analyzing creep buckling problems is also presented

Availability note (English)

MF available from INIS under the Report Number; Available from NTIS., PC A03/MF A01.

Files

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The record is publicly accessible, but files are restricted to users with access.

Additional details

Publishing Information

Imprint Pagination
30 p.
Report number
SAND--76-0721

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
8328465
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Descriptors DEI
ANALYTICAL SOLUTION; CREEP; DEFORMATION; LMFBR TYPE REACTORS; REACTOR COMPONENTS; TIME DEPENDENCE
Descriptors DEC
BREEDER REACTORS; EPITHERMAL REACTORS; FAST REACTORS; FBR TYPE REACTORS; LIQUID METAL COOLED REACTORS; MECHANICAL PROPERTIES; REACTORS

Optional Information

Secondary number(s)
NUREG--0179.