ACORN: a computer program for plotting fault trees. [In FORTRAN for CDC Cyber 74]

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Description

A description and user instructions are presented for ACORN, a FORTRAN computer program for drawing fault trees. ACORN analyzes the input logical structure of a fault tree and provides data for CalComp plot of the tree. AND, OR, and INHIBIT gates are permitted, and basic events are drawn as diamonds, circles, or houses. Each component (gate or basic event) can have a descriptive label within a rectangle attached to the top of its respective symbol. Tree logic is input as a set of FORTRAN statements, each defining a gate in terms of logical operations of the components input to it. ... continued below

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Pages: 48

Creation Information

Carter, J. L. November 1, 1977.

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  • Pacific Northwest Laboratory
    Publisher Info: Battelle Pacific Northwest Labs., Richland, Wash. (USA)
    Place of Publication: Richland, Washington

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Description

A description and user instructions are presented for ACORN, a FORTRAN computer program for drawing fault trees. ACORN analyzes the input logical structure of a fault tree and provides data for CalComp plot of the tree. AND, OR, and INHIBIT gates are permitted, and basic events are drawn as diamonds, circles, or houses. Each component (gate or basic event) can have a descriptive label within a rectangle attached to the top of its respective symbol. Tree logic is input as a set of FORTRAN statements, each defining a gate in terms of logical operations of the components input to it. ACORN develops the logical structure of the tree from the input statements. The tree's physical structure is developed by assigning relative spatial coordinates to the logical relationships between a gate and its inputs. ACORN provides input data checking, a printer plot of the fault tree, and plotting data for a CalComp model 763 plotter. The program is operational on a CONTROL DATA CYBER 74 computer. 2 figures, 1 table.

Physical Description

Pages: 48

Notes

Dep. NTIS, MF A01.

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  • Other Information: Portions of document are illegible

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  • Report No.: BNWL-2144
  • Grant Number: EY-76-C-06-1830
  • DOI: 10.2172/5170830 | External Link
  • Office of Scientific & Technical Information Report Number: 5170830
  • Archival Resource Key: ark:/67531/metadc1055584

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Creation Date

  • November 1, 1977

Added to The UNT Digital Library

  • Jan. 22, 2018, 7:23 a.m.

Description Last Updated

  • Feb. 1, 2018, 1:53 p.m.

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Carter, J. L. ACORN: a computer program for plotting fault trees. [In FORTRAN for CDC Cyber 74], report, November 1, 1977; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc1055584/: accessed June 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.