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Title: Final evaluated 239Pu(n500keV,f) PFNS and uncertainties and test evaluations

  1. Los Alamos National Laboratory
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Technical Report
Country of Publication:
United States
Nuclear Physics & Radiation Physics(73); Atomic and Nuclear Physics

Citation Formats

Neudecker, Denise. Final evaluated 239Pu(n500keV,f) PFNS and uncertainties and test evaluations. United States: N. p., 2014. Web. doi:10.2172/1150662.
Neudecker, Denise. Final evaluated 239Pu(n500keV,f) PFNS and uncertainties and test evaluations. United States. doi:10.2172/1150662.
Neudecker, Denise. Tue . "Final evaluated 239Pu(n500keV,f) PFNS and uncertainties and test evaluations". United States. doi:10.2172/1150662.
title = {Final evaluated 239Pu(n500keV,f) PFNS and uncertainties and test evaluations},
author = {Neudecker, Denise},
abstractNote = {},
doi = {10.2172/1150662},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Aug 26 00:00:00 EDT 2014},
month = {Tue Aug 26 00:00:00 EDT 2014}

Technical Report:

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  • The objectives of the Human Health Exposure Assessment include: (1) estimate the type and magnitude of exposures to contaminants; (2) Identify contaminants of concern; (3) Identify sites for remedial action; (4) Recommend sites for the no action remedial alternative; and (5) Provide a basis for detailed characterization of the risk associated with all sites. This document consists of the following: An executive summary. Vol I - Land use and exposed population evaluations. Vol. II III - Toxicity assessment (includes army and shell toxicity profiles). Vol. IV - PPLV Methodology. Vol. V - PPLV Calculations. Vol. VI - Study area exposuremore » analysis A introduction, B Western study ares, C Southern study area, D northern Central study area, E Central study area, F Eastern study area, G South plants study area, and H North plants study area. Vol. VII - Summary exposure assessment.« less
  • The report gives results of a comparison of three sampling methods for wood-burning stoves: the EPA Modified Method 5 (MM5), the Oregon Method 7 (OM7), and the ASTM proposed Method P180. It also addresses the effect that emission format (grams per hour, grams per kilogram wood burned, micrograms per joule heat output) has on the intermethod correlations. Five stoves (two catalytic, one noncatalytic generic, one noncatalytic high efficiency, and one catalytic fireplace insert) were tested. Test results showed good correlations between the total train emissions obtained with each method. The strength of the correlations varied with the emission format: themore » grams per hour format showed the strongest correlation. POM emissions showed a general (but weak) correlation with total emissions when the grams per hour format was used; there were no correlations when the emissions were expressed in either of the other two formats.« less
  • We calculate the total kinetic and excitation energies of fragments produced in the thermal-induced fission of {sup 239}Pu. This result is a proof-of-principle demonstration for a microscopic approach to the calculation of fission-fragment observables for applied data needs. In addition, the calculations highlight the application of a fully quantum mechanical description of scission, and the importance of exploring scission configurations as a function of the moments of the fragments, rather than through global constraints on the moments of the fissioning nucleus. Using a static microscopic calculation of configurations at and near scission, we have identified fission fragments for the {supmore » 239}Pu (n{sub th}, f) reaction and extracted their total kinetic and excitation energies. Comparison with data shows very good overall agreement between theory and experiment. Beyond their success as a proof of principle, these calculations also highlight the importance of local constraints on the fragments themselves in microscopic calculations.« less
  • The cumulative fission yields of the four nuclides 95Zr, 99Mo, 144Ce and 147Nd are key parameters in estimating the effects from nuclear tests and for post-detonation nuclear forensics in general. Driven particularly by differences in the fission yields from 239Pu(n,f) that have been in use by LLNL and LANL over the years, an intensive effort has been undertaken to evaluate the current state of our knowledge of these yields and to provide a basis for projecting yields to those applicable to forensics. The neutron spectrum producing fission in the Jezebel critical assembly (< E n > ~ 1.9 MeV) maymore » be taken as a reasonable reference. It is desired to know the cumulative fission yields to a total uncertainty (1σ) of ± 2.5%.« less