Experimental investigating on a passive injection and depressurization system for next generation of nuclear power plant

Conference · Mon Dec 01 04:00:00 EST 1997

OSTI ID:549087

Barucca, L; Mansani, L; Saiu, G ^[1]

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1. Company Spa, Genoa (Italy)

The new Generation of Nuclear Power Plant (e.g. WESTINGHOUSE AP600, GE Simplified Boiling Water Reactor (SBWR). ABB Process Inherent Ultimate Safety (PIUS), etc.) have been designed in order to satisfy today`s needs. They are simple, economic, midsize and fully standardized. Those plants enhance safety by extensively relying on passive safety systems that use natural forces and phenomena such as gravity, condensation and evaporation. Evolutionary plants rely on a full Reactor Coolant System (RCS) depressurization to allow gravity injection from an In Containment Tank and assure with its operation the long term core cooling. Depressurization is obtained by the opening of Motor Operated Valves or Squib valves actuated on a logic signal. The concept of depressurizing the primary system following a Small Break Loss of Coolant Accident (LOCA) signal was even developed in the past for the application to the Westinghouse Pressurizer Water Reactor (PWR) Italian Reference Plant. Studies performed to support the licensing process and design of both evolutionary and innovative reactors, have shown that cold water injection may, under particular plant conditions. induce a large plant depressurization. 10 refs., 20 figs., 2 tabs.

• OSTI ID: 549087
• Report Number(s): CONF-970607--Vol.1
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
22 GENERAL STUDIES OF NUCLEAR REACTORS
COMPUTERIZED SIMULATION
DEPRESSURIZATION
LOSS OF COOLANT
PWR TYPE REACTORS
REACTOR COOLING SYSTEMS
REACTOR SAFETY
REACTOR SAFETY EXPERIMENTS
SAFETY INJECTION