TRACE/PARCS Core Modeling of a BWR/5 for Accident Analysis of ATWS Events

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The TRACE/PARCS computational package [1, 2] isdesigned to be applicable to the analysis of light water reactor operational transients and accidents where the coupling between the neutron kinetics (PARCS) and the thermal-hydraulics and thermal-mechanics (TRACE) is important. TRACE/PARCS has been assessed for itsapplicability to anticipated transients without scram(ATWS) [3]. The challenge, addressed in this study, is to develop a sufficiently rigorous input model that would be acceptable for use in ATWS analysis. Two types of ATWS events were of interest, a turbine trip and a closure of main steam isolation valves (MSIVs). In the first type, initiated by turbine trip, ... continued below

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A., Cuadra; J., Baek; Cheng, L.; Aronson, A.; Diamond, D. & Yarsky, P. November 10, 2013.

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The TRACE/PARCS computational package [1, 2] isdesigned to be applicable to the analysis of light water reactor operational transients and accidents where the coupling between the neutron kinetics (PARCS) and the thermal-hydraulics and thermal-mechanics (TRACE) is important. TRACE/PARCS has been assessed for itsapplicability to anticipated transients without scram(ATWS) [3]. The challenge, addressed in this study, is to develop a sufficiently rigorous input model that would be acceptable for use in ATWS analysis. Two types of ATWS events were of interest, a turbine trip and a closure of main steam isolation valves (MSIVs). In the first type, initiated by turbine trip, the concern is that the core will become unstable and large power oscillations will occur. In the second type,initiated by MSIV closure,, the concern is the amount of energy being placed into containment and the resulting emergency depressurization. Two separate TRACE/PARCS models of a BWR/5 were developed to analyze these ATWS events at MELLLA+ (maximum extended load line limit plus)operating conditions. One model [4] was used for analysis of ATWS events leading to instability (ATWS-I);the other [5] for ATWS events leading to emergency depressurization (ATWS-ED). Both models included a large portion of the nuclear steam supply system and controls, and a detailed core model, presented henceforth.

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  • 2013 ANS Winter Meeting and Nuclear Technology Expo; Washington, D.C; 20131110 through 20131114

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  • Report No.: BNL--101128-2013-CP
  • Grant Number: DE-AC02-98CH10886
  • Office of Scientific & Technical Information Report Number: 1108563
  • Archival Resource Key: ark:/67531/metadc867960

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • November 10, 2013

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  • Sept. 16, 2016, 12:32 a.m.

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  • Sept. 21, 2016, 4:56 p.m.

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A., Cuadra; J., Baek; Cheng, L.; Aronson, A.; Diamond, D. & Yarsky, P. TRACE/PARCS Core Modeling of a BWR/5 for Accident Analysis of ATWS Events, article, November 10, 2013; United States. (digital.library.unt.edu/ark:/67531/metadc867960/: accessed November 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.