MORSE/STORM: A generalized albedo option for Monte Carlo calculations

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The advisability of using the albedo procedure for the Monte Carlo solution of deep penetration shielding problems that have ducts and other penetrations has been investigated. The use of albedo data can dramatically improve the computational efficiency of certain Monte Carlo calculations. However, the accuracy of these results may be unacceptable because of lost information during the albedo event and serious errors in the available differential albedo data. This study was done to evaluate and appropriately modify the MORSE/BREESE package, to develop new methods for generating the required albedo data, and to extend the adjoint capability to the albedo-modified calculations. ... continued below

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Pages: (58 p)

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Gomes, I.C. & Stevens, P.N. (Tennessee Univ., Knoxville, TN (United States)) September 1, 1991.

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Description

The advisability of using the albedo procedure for the Monte Carlo solution of deep penetration shielding problems that have ducts and other penetrations has been investigated. The use of albedo data can dramatically improve the computational efficiency of certain Monte Carlo calculations. However, the accuracy of these results may be unacceptable because of lost information during the albedo event and serious errors in the available differential albedo data. This study was done to evaluate and appropriately modify the MORSE/BREESE package, to develop new methods for generating the required albedo data, and to extend the adjoint capability to the albedo-modified calculations. Major modifications to MORSE/BREESE include an option to save for further use information that would be lost at the albedo event, an option to displace the point of emergence during an albedo event, and an option to use spatially dependent albedo data for both forward and adjoint calculations, which includes the point of emergence as a new random variable to be selected during an albedo event. The theoretical basis for using TORT-generated forward albedo information to produce adjuncton albedos was derived. The MORSE/STORM package was developed to perform both forward and adjoint modes of analysis using spatially dependent albedo data. Results obtained with MORSE/STORM for both forward and adjoint modes were compared with benchmark solutions. Excellent agreement and improved computational efficiency were achieved, demonstrating the full utilization of the albedo option in the MORSE code. 7 refs., 17 figs., 15 tabs.

Physical Description

Pages: (58 p)

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OSTI; NTIS; INIS; GPO Dep.

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  • Other: DE92002380
  • Report No.: ORNL/FEDC-91/1
  • Grant Number: AC05-84OR21400
  • DOI: 10.2172/5017268 | External Link
  • Office of Scientific & Technical Information Report Number: 5017268
  • Archival Resource Key: ark:/67531/metadc1052785

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  • September 1, 1991

Added to The UNT Digital Library

  • Jan. 22, 2018, 7:23 a.m.

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  • Feb. 1, 2018, 6:18 p.m.

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Gomes, I.C. & Stevens, P.N. (Tennessee Univ., Knoxville, TN (United States)). MORSE/STORM: A generalized albedo option for Monte Carlo calculations, report, September 1, 1991; Tennessee. (digital.library.unt.edu/ark:/67531/metadc1052785/: accessed October 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.