Montreal Nuclear Services

Affordable Nuclear Expertise

Containment and Dose Analyses for Gentilly-2

GENTILLY-2

SCOPE

Perform containment safety analyses and evaluate public doses for postulated accident at the Gentilly-2 nuclear power plant.

DESCRIPTION

To comply with regulatory requirements from the Canadian Nuclear Safety Commission (CNSC), Hydro-Québec was required to perform detailed safety analyses, including containment and public doses analyses, for Gentilly-2 nuclear power plant.


The work consisted of developing and testing the GOTHIC, SMART and ADDAM models of the reactor building, fission product transport and atmospheric dispersion for the Gentilly-2 nuclear power plant. GOTHIC nodal and 3D models were developed and used for several accident scenarios.

The GOTHIC, SMART and ADDAM models were used to perform public doses calculations for moderator events (tritium), including loss of heat sink and loss of moderator inventory. They were also used for public dose calculations for multiple steam generator tube rupture and pressure tube and calandria tube rupture with consequential end fitting failures.

GOTHIC was also used to simulate ECC conditioning signal for pressure tube and calandria tube rupture, and high reactor building trip for small LOCAs scenarios.

The work was contracted by Hydro-Québec to AECL (Atomic Energy of Canada Ltd).  Pascal Hernu was the technical lead. Gilles Sabourin assumed technical supervision.


NOTE:  This work was performed / lead by MNS personnel during their previous employment


OUTCOME

  • GOTHIC,  SMART and ADDAM containment, fission product transport and atmospheric dispersion models for Gentilly-2

  • Verification of the GOTHIC, SMART and ADDAM models.

  • Models and Methodology reports,  Analysis Reports : one for moderator events and one for pressure tube and calandria tube rupture

DISCIPLINES

  • Thermalhydraulics​
  • Containment
  • Fission Product Transport
  • Atmospheric Dispersion


CLIENT

Hydro-Québec

Gentilly-2, Canada


Timeframe

2008-2012


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