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Abstract

This paper outlines the characteristic features and salient results of a series of experiments conducted in the LOBI-MOD2 facility to assess the effectiveness of intentional primary cooling system depressurisation. Following the complete degradation of the secondary system heat sink, plant cooldown could be ensured through a feed and bleed procedure, whereby the PCS is intentionally depressurised using the pressuriser power operated relief valves (PORVs), while the lost inventory is replenished by the active high pressure injection system (HPIS) or by the passive accumulator injection system (AIS). Although test conditions were strictly pertinent to PWRs of current design, the underlying thermal-hydraulic phenomenologies are nevertheless of general interest for the conceptual development of advanced reactor concepts.

Additional information

Authors: DE SANTI G, JRC Ispra (IT);ANNUNZIATO A, JRC Ispra (IT);ADDABBO C, JRC Ispra (IT)
Bibliographic Reference: Paper presented: 9th National Heat Transfer Congress (UIT), Pisa (IT), June 13-14, 1991
Availability: Available from (1) as Paper EN 36192 ORA
Record Number: 199110823 / Last updated on: 1994-12-02
Category: PUBLICATION
Original language: en
Available languages: en
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