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Title: Resolved Resonance Region Analysis of 206Pb, 207Pb, and 208Pb for Next Generation Lead-Cooled Fast Systems

Journal Article · · EPJ Web of Conferences (Online)
 [1];  [2];  [3];  [4]
  1. Rensselaer Polytechnic Institute (RPI), Troy, NY (United States); OSTI
  2. Rensselaer Polytechnic Institute (RPI), Troy, NY (United States)
  3. Brookhaven National Laboratory (BNL), Upton, NY (United States)
  4. Naval Nuclear Laboratory, Schenectady, NY (United States)
+ Show Author Affiliations

Recently, great interest has been generated in using lead as a coolant for fast neutron systems and as a result it is important to investigate the ENDF/B-VIII.0 isotopic evaluations that comprise stable le ad. To this end, resonance parameters for 206Pb, 207Pb, and 208Pb were re-evaluated because their resolved reso­nance regions extend beyond 0.5 MeV meaning resonance parameters used in reconstructing cross sections and elastic scattering angular distributions impact fast systems. The impact of resonance parameters is demon­strated by the differences between the evaluations in predicting experimental results from the fully modeled RPI Quasi-Differential Scattering Experiment via MCNPv6.2. In addition, MCNP KCODE calculations of lead-sensitive fast spectra critical benchmarks showed variations of keff on average of 400 pcm, caused solely from differences in elastic scattering angular distributions in 208Pb. Re-evaluation entailed fitting data with the program SAMMY.

Research Organization:
Rensselaer Polytechnic Institute (RPI), Troy, NY (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
Grant/Contract Number:
89233018CNR000004
OSTI ID:
1995747
Journal Information:
EPJ Web of Conferences (Online), Journal Name: EPJ Web of Conferences (Online) Vol. 284; ISSN 2100-014X
Publisher:
EDP SciencesCopyright Statement
Country of Publication:
United States
Language:
English

References (9)

Towards a More Complete and Accurate Experimental Nuclear Reaction Data Library (EXFOR): International Collaboration Between Nuclear Reaction Data Centres (NRDC) journal June 2014
The Angular Distribution of Scattering and Reaction Cross Sections journal October 1952
Measurement of the radiative neutron capture cross section ofPb206and its astrophysical implications journal October 2007
Resonance capture cross section of Pb 207 journal November 2006
The joint evaluated fission and fusion nuclear data library, JEFF-3.3 journal July 2020
NJOY21: Next generation nuclear data processing capabilities journal January 2017
High-resolution neutron transmission and capture measurements of the nucleusPb206 journal July 2007
Updated User's Guide for Sammy: Multilevel R-Matrix Fits to Neutron Data Using Bayes' Equations report October 2008
Myrrha, a Multipurpose European ads for r&d conference September 2004

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
97 MATHEMATICS AND COMPUTING
Nuclear Criticality Safety Program (NCSP)