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Applicability Analysis of Assessment Methods for Morphological Parameters of Corroded Steel Bars
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Development of a connection-method calculation utility for the DORT-TORT code.

Yoshihiro Hirao1, Yoshihiro Matsumoto

  • 1Nuclear Safety Technology Group, National Maritime Research Institute, Shinkawa 6-38-1, Mitaka-shi, Tokyo, Japan. tora@nmri.go.jp

Radiation Protection Dosimetry
|April 11, 2006
PubMed
Summary
This summary is machine-generated.

A new code package enables connection-method calculations for 2-D and 3-D SN codes, enhancing neutron transport simulations. This method allows coupling problems by transforming output fluxes into source terms, showing good agreement with reference results but highlighting dimensional influences.

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Area of Science:

  • Computational physics
  • Nuclear engineering
  • Neutronics

Background:

  • Existing discrete ordinates (SN) codes like DORT and TORT have limitations in handling complex coupled problems.
  • The development of advanced computational tools is crucial for accurate neutron transport simulations.

Purpose of the Study:

  • To develop and evaluate a code package utilizing the connection-method for 2-D and 3-D SN codes (DORT-TORT).
  • To assess the capability of coupling sequential problems by transforming output fluxes into source terms.
  • To validate the code's performance using a duct-streaming problem with a 14 MeV neutron source.

Main Methods:

  • Developed a code package implementing the connection-method for DORT (2-D) and TORT (3-D) SN codes.
  • Incorporated support utilities for simplified input preparation.
  • Performed coupling calculations for a two-leg duct-streaming problem, comparing RZ-RZ (DORT) results with MCNP4B.

Main Results:

  • The RZ-RZ (DORT) calculation demonstrated good agreement with the reference MCNP4B results for the duct-streaming problem.
  • The study identified that calculation region dimensions influence the results.
  • Some transformation errors were observed, indicating areas for refinement.

Conclusions:

  • The developed DORT-TORT code package effectively extends SN code capabilities for coupled neutron transport problems.
  • The connection-method shows promise for linking sequential simulations, though dimensional effects and transformation accuracy require further attention.
  • Full preparation of the first collision source is necessary for accurate 3-D TORT transformations.