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Title: Core Subcriticality as a Tool of Safety Enhancement

Abstract

Core subcriticality can play an important role if the safety enhancement of a nuclear system is necessary, in particular, when minor actinides submitted for transmutation cause essential degradation of the reactivity feedback effects or/and significant reduction of the delayed neutron fraction. The present work shows that core subcriticality together with thermohydraulics optimization can compensate for the possible degradation of the Doppler effect and the reduction of the delayed neutron fraction. The particular dependence of the spallation neutron yield allows the creation of a supplementary negative feedback effect in case of accelerator coupled hybrid systems. A number of quantitative examples are provided in this context.

Authors:
 [1];  [2];  [3];  [3]
  1. DSM/ DAPNIA/ SPhN, CEA Saclay (France)
  2. DSM/ DAPNIA0SPhN, CEA Saclay (France)
  3. DEN/ DER/ SPRC, CEA Cadarache (France)
Publication Date:
OSTI Identifier:
20808485
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nuclear Science and Engineering; Journal Volume: 151; Journal Issue: 3; Other Information: Copyright (c) 2006 American Nuclear Society (ANS), United States, All rights reserved. http://epubs.ans.org/; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; ACCELERATOR DRIVEN TRANSMUTATION; ACCELERATORS; ACTINIDES; CRITICALITY; DELAYED NEUTRON FRACTION; DOPPLER EFFECT; HYBRID SYSTEMS; NEUTRONS; OPTIMIZATION; REACTIVITY COEFFICIENTS; REACTOR CORES; SAFETY; SPALLATION; SUBCRITICAL ASSEMBLIES; THERMAL HYDRAULICS

Citation Formats

Bokov, Pavel M., Ridikas, Danas, Slessarev, Igor, and Koeberl, Oliver. Core Subcriticality as a Tool of Safety Enhancement. United States: N. p., 2005. Web.
Bokov, Pavel M., Ridikas, Danas, Slessarev, Igor, & Koeberl, Oliver. Core Subcriticality as a Tool of Safety Enhancement. United States.
Bokov, Pavel M., Ridikas, Danas, Slessarev, Igor, and Koeberl, Oliver. Tue . "Core Subcriticality as a Tool of Safety Enhancement". United States. doi:.
@article{osti_20808485,
title = {Core Subcriticality as a Tool of Safety Enhancement},
author = {Bokov, Pavel M. and Ridikas, Danas and Slessarev, Igor and Koeberl, Oliver},
abstractNote = {Core subcriticality can play an important role if the safety enhancement of a nuclear system is necessary, in particular, when minor actinides submitted for transmutation cause essential degradation of the reactivity feedback effects or/and significant reduction of the delayed neutron fraction. The present work shows that core subcriticality together with thermohydraulics optimization can compensate for the possible degradation of the Doppler effect and the reduction of the delayed neutron fraction. The particular dependence of the spallation neutron yield allows the creation of a supplementary negative feedback effect in case of accelerator coupled hybrid systems. A number of quantitative examples are provided in this context.},
doi = {},
journal = {Nuclear Science and Engineering},
number = 3,
volume = 151,
place = {United States},
year = {Tue Nov 15 00:00:00 EST 2005},
month = {Tue Nov 15 00:00:00 EST 2005}
}