Status of a new evaluation of the neutron resonance parameters of 238U at ORNL

H. Derrien; L. C. Leal; N. M. Larson

Status of a new evaluation of the neutron resonance parameters of ²³⁸U at ORNL

H. Derrien
, L. C. Leal
, N. M. Larson

Nuclear Data

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

5 Scopus citations

Abstract

Neutron resonance parameters were obtained in the energy range 0 keV to 20 keV from a sequential SAMMY analysis of high resolution neutron transmissions and capture cross sections measured at the Oak Ridge Electron Linear Accelerator (ORELA). In the energy range 0 keV to 10 keV the analysis used as prior values the resonance parameters of ENDF/B-VI evaluated file. In the energy range 10 keV to 20 keV, where ENDF/B-VI uses average parameters for the description of the cross sections, this analysis resulted in the creation of a set of resolved resonance parameters which will allow more accurate calculation of the self shielding factors. The statistical properties of the parameters in the energy range 0 keV to 20 keV are given. The results of selected benchmark calculations show significant improvements compared to calculations using the ENDF/B-VI evaluation, particularly for the k_eff prediction in thermal benchmarks.

Original language	English
Title of host publication	Proceedings of the PHYSOR 2004
Subtitle of host publication	The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments
Pages	1971-1978
Number of pages	8
State	Published - 2004
Event	PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments - Chicago, IL, United States Duration: Apr 25 2004 → Apr 29 2004

Publication series

Name	Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments

Conference

Conference	PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments
Country/Territory	United States
City	Chicago, IL
Period	04/25/04 → 04/29/04

Keywords

Benchmarks
Evaluation
Neutron cross section
Resonance parameters
Statistical properties

Cite this

Derrien, H., Leal, L. C., & Larson, N. M. (2004). Status of a new evaluation of the neutron resonance parameters of ²³⁸U at ORNL. In Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments (pp. 1971-1978). (Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments).

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title = "Status of a new evaluation of the neutron resonance parameters of 238U at ORNL",

abstract = "Neutron resonance parameters were obtained in the energy range 0 keV to 20 keV from a sequential SAMMY analysis of high resolution neutron transmissions and capture cross sections measured at the Oak Ridge Electron Linear Accelerator (ORELA). In the energy range 0 keV to 10 keV the analysis used as prior values the resonance parameters of ENDF/B-VI evaluated file. In the energy range 10 keV to 20 keV, where ENDF/B-VI uses average parameters for the description of the cross sections, this analysis resulted in the creation of a set of resolved resonance parameters which will allow more accurate calculation of the self shielding factors. The statistical properties of the parameters in the energy range 0 keV to 20 keV are given. The results of selected benchmark calculations show significant improvements compared to calculations using the ENDF/B-VI evaluation, particularly for the keff prediction in thermal benchmarks.",

keywords = "Benchmarks, Evaluation, Neutron cross section, Resonance parameters, Statistical properties",

author = "H. Derrien and Leal, \{L. C.\} and Larson, \{N. M.\}",

year = "2004",

language = "English",

isbn = "0894486837",

series = "Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments",

pages = "1971--1978",

booktitle = "Proceedings of the PHYSOR 2004",

note = "PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments ; Conference date: 25-04-2004 Through 29-04-2004",

}

Derrien, H, Leal, LC & Larson, NM 2004, Status of a new evaluation of the neutron resonance parameters of ²³⁸U at ORNL. in Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments. Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments, pp. 1971-1978, PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments, Chicago, IL, United States, 04/25/04.

Status of a new evaluation of the neutron resonance parameters of ²³⁸U at ORNL. / Derrien, H.; Leal, L. C.; Larson, N. M.
Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments. 2004. p. 1971-1978 (Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Status of a new evaluation of the neutron resonance parameters of 238U at ORNL

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AU - Leal, L. C.

AU - Larson, N. M.

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N2 - Neutron resonance parameters were obtained in the energy range 0 keV to 20 keV from a sequential SAMMY analysis of high resolution neutron transmissions and capture cross sections measured at the Oak Ridge Electron Linear Accelerator (ORELA). In the energy range 0 keV to 10 keV the analysis used as prior values the resonance parameters of ENDF/B-VI evaluated file. In the energy range 10 keV to 20 keV, where ENDF/B-VI uses average parameters for the description of the cross sections, this analysis resulted in the creation of a set of resolved resonance parameters which will allow more accurate calculation of the self shielding factors. The statistical properties of the parameters in the energy range 0 keV to 20 keV are given. The results of selected benchmark calculations show significant improvements compared to calculations using the ENDF/B-VI evaluation, particularly for the keff prediction in thermal benchmarks.

AB - Neutron resonance parameters were obtained in the energy range 0 keV to 20 keV from a sequential SAMMY analysis of high resolution neutron transmissions and capture cross sections measured at the Oak Ridge Electron Linear Accelerator (ORELA). In the energy range 0 keV to 10 keV the analysis used as prior values the resonance parameters of ENDF/B-VI evaluated file. In the energy range 10 keV to 20 keV, where ENDF/B-VI uses average parameters for the description of the cross sections, this analysis resulted in the creation of a set of resolved resonance parameters which will allow more accurate calculation of the self shielding factors. The statistical properties of the parameters in the energy range 0 keV to 20 keV are given. The results of selected benchmark calculations show significant improvements compared to calculations using the ENDF/B-VI evaluation, particularly for the keff prediction in thermal benchmarks.

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KW - Statistical properties

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