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Title: P{sub 3} upscattering integrals for the effective temperature model for hydrogen

Abstract

Accurate representation of the epithermal flux rise in water-moderated lattices requires the treatment of thermalization effects above the thermal cutpoint (typically 0.625 eV). These thermalization effects may be accurately represented by treating hydrogen bound in water as a mass-one free gas at an effective temperature, T{sup *} = kT{sub e}, and treating upscattering as scattering without energy change. Typical values of T{sup *} are 0.120 eV for room temperature water and 0.129 eV for 300 C water. The author proposes an algorithm for accurately calculating the P{sub 3} moments of the upscattering integral.

Authors:
 [1]
  1. Bettis Atomic Power Lab., West Mifflin, PA (United States)
Publication Date:
OSTI Identifier:
678159
Report Number(s):
CONF-990605-
Journal ID: TANSAO; ISSN 0003-018X; TRN: 99:009144
Resource Type:
Journal Article
Journal Name:
Transactions of the American Nuclear Society
Additional Journal Information:
Journal Volume: 80; Conference: 1999 annual meeting of the American Nuclear Society (ANS), Boston, MA (United States), 6-10 Jun 1999; Other Information: PBD: 1999
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; 22 NUCLEAR REACTOR TECHNOLOGY; MODERATORS; THERMALIZATION; NEUTRON TRANSPORT; HYDROGEN; EPITHERMAL NEUTRONS; SCATTERING; ALGORITHMS; P3-APPROXIMATION; ANALYTICAL SOLUTION; REACTOR KINETICS

Citation Formats

Zerkle, M.L. P{sub 3} upscattering integrals for the effective temperature model for hydrogen. United States: N. p., 1999. Web.
Zerkle, M.L. P{sub 3} upscattering integrals for the effective temperature model for hydrogen. United States.
Zerkle, M.L. Wed . "P{sub 3} upscattering integrals for the effective temperature model for hydrogen". United States.
@article{osti_678159,
title = {P{sub 3} upscattering integrals for the effective temperature model for hydrogen},
author = {Zerkle, M.L.},
abstractNote = {Accurate representation of the epithermal flux rise in water-moderated lattices requires the treatment of thermalization effects above the thermal cutpoint (typically 0.625 eV). These thermalization effects may be accurately represented by treating hydrogen bound in water as a mass-one free gas at an effective temperature, T{sup *} = kT{sub e}, and treating upscattering as scattering without energy change. Typical values of T{sup *} are 0.120 eV for room temperature water and 0.129 eV for 300 C water. The author proposes an algorithm for accurately calculating the P{sub 3} moments of the upscattering integral.},
doi = {},
journal = {Transactions of the American Nuclear Society},
number = ,
volume = 80,
place = {United States},
year = {1999},
month = {9}
}