Break location influence in pressure vessel SBLOCA scenarios

Authors

  • María Lorduy Universitat Politècnica de València
  • Andrea Querol Universitat Politècnica de València
  • Sergio Gallardo Universitat Politècnica de València
  • Gumersindo Verdú Universitat Politècnica de València

DOI:

https://doi.org/10.15392/bjrs.v8i3B.712

Keywords:

SBLOCA, AM actions, TRACE

Abstract

The inspections performed in Davis Besse and in the South Texas Project Unit-I reactors pointed out safety issues regarding the structural integrity of the Pressure Vessel (PV). In these inspections, two anomalies were found: a wall thinning and degradation in the PV upper head of the Davis Besse reactor and a small amount of residue around of two instrument-tube penetration nozzles located in the PV lower plenum of the South Texas Project Unit-I reactor. The evolution of these defects could have resulted in Small Break Loss-Of-Coolant Accidents (SBLOCA) if they had not been detected in time. In this frame, the OECD/NEA considered the necessity to simulate these accidental sequences in the OECD/NEA ROSA Project using the Large Scale Test Facility (LSTF). This work is focused on simulating different hypothetical accidental scenarios in the PV using the thermal-hydraulic code TRACE5. These simulations allow studying the break localization influence in the transient and the effectiveness of the accident management (AM) actions considered mitigating the consequences of these hypothetical accidental scenarios.

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Author Biographies

María Lorduy, Universitat Politècnica de València

Instituto Universitario de Seguridad Industrial, Radiofísica y Medioambiental

Andrea Querol, Universitat Politècnica de València

Instituto Universitario de Seguridad Industrial, Radiofísica y Medioambiental

Sergio Gallardo, Universitat Politècnica de València

Instituto Universitario de Seguridad Industrial, Radiofísica y Medioambiental

Gumersindo Verdú, Universitat Politècnica de València

Instituto Universitario de Seguridad Industrial, Radiofísica y Medioambiental

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Published

2021-02-13

How to Cite

Lorduy, M., Querol, A., Gallardo, S., & Verdú, G. (2021). Break location influence in pressure vessel SBLOCA scenarios. Brazilian Journal of Radiation Sciences, 8(3B (Suppl.). https://doi.org/10.15392/bjrs.v8i3B.712

Issue

Section

XX Meeting on Nuclear Reactor Physics and Thermal Hydraulics (XX ENFIR)