Within the 4th Framework Program for the European Atomic Energy Community in the Nuclear Fission Safety, the BWR Phisics and Thermohydraulic Complementary Action to the BWR Cluster (BWRCA Project) intends to perform complementary efforts on items already proposed in the IPSS - BWR R &D Cluster project. The design of innovative components, which could improve the performances of the passive systems studied under the BWR R & D Cluster, is the objectives of BWRCA. On this purpose the Work Package 1 is specifically devoted to the implementation and assessment of the Thermal Valve (TV) concept on Isolation Condenser Systems. Such concept is able to avoid the implementation of mechanical valves on DHR system with in-pool heat exchanger. As a first step a conceptual design of the TV/IC system has been proposed for an innovative BWR to develop an analytical model. This model has allowed performing some steady state calculations with Relap and Cathare codes, which lead to verify the heat removal capability of the IC system provided with TV. This document describes the transient calculations, which aim at confirming the natural circulation stability in normal and out-of-normal scenarious foreseen for the IC system.

Thermal Valve: Final Report on CATHARE & RELAP Modelisation and Calculations for Steady State and Transient

Meloni, P.
1998

Abstract

Within the 4th Framework Program for the European Atomic Energy Community in the Nuclear Fission Safety, the BWR Phisics and Thermohydraulic Complementary Action to the BWR Cluster (BWRCA Project) intends to perform complementary efforts on items already proposed in the IPSS - BWR R &D Cluster project. The design of innovative components, which could improve the performances of the passive systems studied under the BWR R & D Cluster, is the objectives of BWRCA. On this purpose the Work Package 1 is specifically devoted to the implementation and assessment of the Thermal Valve (TV) concept on Isolation Condenser Systems. Such concept is able to avoid the implementation of mechanical valves on DHR system with in-pool heat exchanger. As a first step a conceptual design of the TV/IC system has been proposed for an innovative BWR to develop an analytical model. This model has allowed performing some steady state calculations with Relap and Cathare codes, which lead to verify the heat removal capability of the IC system provided with TV. This document describes the transient calculations, which aim at confirming the natural circulation stability in normal and out-of-normal scenarious foreseen for the IC system.
Analisi sistemi e di sicurezza
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12079/6289
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