skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Impact of Reprocessed Uranium Management on the Homogeneous Recycling of Transuranics in PWRs

Abstract

This article presents the results of a neutronics analysis related to the homogeneous recycling of transuranics (TRU) in PWRs with a MOX fuel using enriched uranium instead of depleted uranium. It also addresses an often, if not always, overlooked aspect related to the recycling of TRU in PWRs, namely the use of reprocessed uranium. From a neutronics point of view, it is possible to multi-recycle the entirety of the plutonium with or without neptunium and americium in a PWR fleet using MOX-EU fuel in between one third and two thirds of the fleet. Recycling neptunium and americium with plutonium significantly decreases the decay heat of the waste stream between 100 to 1,000 years compared to those of an open fuel cycle or when only plutonium is recycled. The uranium present in MOX-EU used fuel still contains a significant amount of 235uranium and recycling it makes a major difference on the natural uranium needs. For example, a PWR fleet recycling its plutonium, neptunium and americium in MOXEU needs 28 percent more natural uranium than a reference UO 2 open cycle fleet generating the same energy if the reprocessed uranium is not recycled and 19 percent less if the reprocessed uranium ismore » recycled back in the reactors, i.e. a 47 percent difference.« less

Authors:
 [1]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States). Nuclear Systems Design and Analysis Division
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1367871
Report Number(s):
INL/JOU-16-40546
Journal ID: ISSN 0029-5450
Grant/Contract Number:
AC07-05ID14517
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nuclear Technology
Additional Journal Information:
Journal Volume: 198; Journal Issue: 2; Journal ID: ISSN 0029-5450
Publisher:
American Nuclear Society (ANS)
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; Reprocessed Uranium; Transurancics in PWRS; Uranium management; Plutonium; TRU; Recycling; PWR

Citation Formats

Youinou, Gilles J. Impact of Reprocessed Uranium Management on the Homogeneous Recycling of Transuranics in PWRs. United States: N. p., 2017. Web. doi:10.1080/00295450.2017.1305191.
Youinou, Gilles J. Impact of Reprocessed Uranium Management on the Homogeneous Recycling of Transuranics in PWRs. United States. doi:10.1080/00295450.2017.1305191.
Youinou, Gilles J. 2017. "Impact of Reprocessed Uranium Management on the Homogeneous Recycling of Transuranics in PWRs". United States. doi:10.1080/00295450.2017.1305191.
@article{osti_1367871,
title = {Impact of Reprocessed Uranium Management on the Homogeneous Recycling of Transuranics in PWRs},
author = {Youinou, Gilles J.},
abstractNote = {This article presents the results of a neutronics analysis related to the homogeneous recycling of transuranics (TRU) in PWRs with a MOX fuel using enriched uranium instead of depleted uranium. It also addresses an often, if not always, overlooked aspect related to the recycling of TRU in PWRs, namely the use of reprocessed uranium. From a neutronics point of view, it is possible to multi-recycle the entirety of the plutonium with or without neptunium and americium in a PWR fleet using MOX-EU fuel in between one third and two thirds of the fleet. Recycling neptunium and americium with plutonium significantly decreases the decay heat of the waste stream between 100 to 1,000 years compared to those of an open fuel cycle or when only plutonium is recycled. The uranium present in MOX-EU used fuel still contains a significant amount of 235uranium and recycling it makes a major difference on the natural uranium needs. For example, a PWR fleet recycling its plutonium, neptunium and americium in MOXEU needs 28 percent more natural uranium than a reference UO2 open cycle fleet generating the same energy if the reprocessed uranium is not recycled and 19 percent less if the reprocessed uranium is recycled back in the reactors, i.e. a 47 percent difference.},
doi = {10.1080/00295450.2017.1305191},
journal = {Nuclear Technology},
number = 2,
volume = 198,
place = {United States},
year = 2017,
month = 5
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on May 4, 2018
Publisher's Version of Record

Save / Share:
  • A complex approach based on the consistent modeling of neutron-physics processes and processes of cascade separation of isotopes is applied for analyzing physical problems of the multiple usage of reprocessed uranium in the fuel cycle of light water reactors. A number of scenarios of multiple recycling of reprocessed uranium in light water reactors are considered. In the process, an excess absorption of neutrons by the {sup 236}U isotope is compensated by re-enrichment in the {sup 235}U isotope. Specific consumptions of natural uranium for re-enrichment of the reprocessed uranium depending on the content of the {sup 232}U isotope are obtained.
  • This article examines the various methods used to produce recycled rubber and to compare their characteristics and application. The topics discussed include reclaiming by chemical digestion, devulcanization by the severing of sulfur bonds, ambient temperature and cryogenically ground rubber, processing and mixing of ground rubber, and properties of reclaimed rubbers by reclamation method.
  • Assembly-level collision probability calculations are performed with the CASMO code to study the feasibility and efficiency of recycling transuranics (TRUs) in pressurized water reactors (PWRs). A zero-dimensional equilibrium cycle approach is combined with an extrapolation algorithm to estimate equilibrium cycle configurations in a three-zone PWR core. A whole-core implementation of mixed-oxide assemblies containing TRUs may require an unusually large loading of TRUs, but a (2 [times] 2) colorset arrangement of TRU and uranium assemblies, with a sufficient [sup 235]U enrichment, may yield a reasonable PWR configuration. Colorset arrangements will not result in net depletion of TRUs but will slow downmore » the accumulation of TRUs in a continuing PWR economy.« less
  • Cited by 6