RAMONA-4B a computer code with three-dimensional neutron kinetics for BWR and SBWR system transient - models and correlations

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This document describes the major modifications and improvements made to the modeling of the RAMONA-3B/MOD0 code since 1981, when the code description and assessment report was completed. The new version of the code is RAMONA-4B. RAMONA-4B is a systems transient code for application to different versions of Boiling Water Reactors (BWR) such as the current BWR, the Advanced Boiling Water Reactor (ABWR), and the Simplified Boiling Water Reactor (SBWR). This code uses a three-dimensional neutron kinetics model coupled with a multichannel, non-equilibrium, drift-flux, two-phase flow formulation of the thermal hydraulics of the reactor vessel. The code is designed to analyze ... continued below

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440 p.

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Rohatgi, U. S.; Cheng, H. S.; Khan, H. J.; Mallen, A. N. & Neymotin, L. Y. March 1998.

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Description

This document describes the major modifications and improvements made to the modeling of the RAMONA-3B/MOD0 code since 1981, when the code description and assessment report was completed. The new version of the code is RAMONA-4B. RAMONA-4B is a systems transient code for application to different versions of Boiling Water Reactors (BWR) such as the current BWR, the Advanced Boiling Water Reactor (ABWR), and the Simplified Boiling Water Reactor (SBWR). This code uses a three-dimensional neutron kinetics model coupled with a multichannel, non-equilibrium, drift-flux, two-phase flow formulation of the thermal hydraulics of the reactor vessel. The code is designed to analyze a wide spectrum of BWR core and system transients and instability issues. Chapter 1 is an overview of the code`s capabilities and limitations; Chapter 2 discusses the neutron kinetics modeling and the implementation of reactivity edits. Chapter 3 is an overview of the heat conduction calculations. Chapter 4 presents modifications to the thermal-hydraulics model of the vessel, recirculation loop, steam separators, boron transport, and SBWR specific components. Chapter 5 describes modeling of the plant control and safety systems. Chapter 6 presents and modeling of Balance of Plant (BOP). Chapter 7 describes the mechanistic containment model in the code. The content of this report is complementary to the RAMONA-3B code description and assessment document. 53 refs., 81 figs., 13 tabs.

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440 p.

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INIS; OSTI as TI98003332

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  • Other Information: PBD: Mar 1998

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  • Other: TI98003332
  • Report No.: NUREG/CR--6359-Vol.1
  • Report No.: BNL-NUREG--52471-Vol.1
  • Grant Number: AC02-76CH00016
  • DOI: 10.2172/576037 | External Link
  • Office of Scientific & Technical Information Report Number: 576037
  • Archival Resource Key: ark:/67531/metadc691025

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  • March 1998

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  • Aug. 14, 2015, 8:43 a.m.

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  • April 22, 2016, 6:49 p.m.

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Rohatgi, U. S.; Cheng, H. S.; Khan, H. J.; Mallen, A. N. & Neymotin, L. Y. RAMONA-4B a computer code with three-dimensional neutron kinetics for BWR and SBWR system transient - models and correlations, report, March 1998; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc691025/: accessed December 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.