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Title: SPALLMAP

Abstract

Boiler tubes in steam power plants experience exfoliation of oxide grown on the inner side of the tubes. In extreme cases, the exfoliation cause significant tube blockages that lead to forced power plant outages. It is thus desired to predict through modeling the propensity of exfoliation events in order to inform power plant operators of possible tube blockages. SpallMap solves for the stress-strain equations in an axisymmetric geometry, tracking the stress/strain evolution during boiler operation including outages at one-location along a boiler tube and compares it with scale damage criteria represented by Armitt diagram. The SPALLMAP code contains modules developed for oxide growth, stress analysis, and classical fracture mechanics correlations by taking into account the following phenomena and features, (a) Non-uniform thermal expansion coefficient of oxides and metal substrates, (b) Plant operation schedule with periodic alternate full-load and partial-load regimes, (c) axisymmetric formulation for cylindrical tubes, (d) Multiple oxide layers, (e) oxide-growth induced stresses, and (f) damage criteria from classical fracture mechanics. The computer program is written in FORTRAN90. Its modular structure was sought for allowing the best flexibility in updating the program by implementing new constitutive equations due to availability of new material property data and/or new physical phenomena.

Authors:
 [1];  [1]
  1. Oak Ridge National Laboratory
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1439576
Report Number(s):
SPALLMAP; 005723WKSTN00
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Software
Software Revision:
00
Software Package Number:
005723
Software CPU:
WKSTN
Open Source:
Yes
Source Code Available:
Yes
Country of Publication:
United States

Citation Formats

Sabau, Adrian, and Wright, Ian. SPALLMAP. Computer software. https://www.osti.gov//servlets/purl/1439576. Vers. 00. USDOE. 22 Mar. 2018. Web.
Sabau, Adrian, & Wright, Ian. (2018, March 22). SPALLMAP (Version 00) [Computer software]. https://www.osti.gov//servlets/purl/1439576.
Sabau, Adrian, and Wright, Ian. SPALLMAP. Computer software. Version 00. March 22, 2018. https://www.osti.gov//servlets/purl/1439576.
@misc{osti_1439576,
title = {SPALLMAP, Version 00},
author = {Sabau, Adrian and Wright, Ian},
abstractNote = {Boiler tubes in steam power plants experience exfoliation of oxide grown on the inner side of the tubes. In extreme cases, the exfoliation cause significant tube blockages that lead to forced power plant outages. It is thus desired to predict through modeling the propensity of exfoliation events in order to inform power plant operators of possible tube blockages. SpallMap solves for the stress-strain equations in an axisymmetric geometry, tracking the stress/strain evolution during boiler operation including outages at one-location along a boiler tube and compares it with scale damage criteria represented by Armitt diagram. The SPALLMAP code contains modules developed for oxide growth, stress analysis, and classical fracture mechanics correlations by taking into account the following phenomena and features, (a) Non-uniform thermal expansion coefficient of oxides and metal substrates, (b) Plant operation schedule with periodic alternate full-load and partial-load regimes, (c) axisymmetric formulation for cylindrical tubes, (d) Multiple oxide layers, (e) oxide-growth induced stresses, and (f) damage criteria from classical fracture mechanics. The computer program is written in FORTRAN90. Its modular structure was sought for allowing the best flexibility in updating the program by implementing new constitutive equations due to availability of new material property data and/or new physical phenomena.},
url = {https://www.osti.gov//servlets/purl/1439576},
doi = {},
year = {2018},
month = {3},
note =
}