Montreal Nuclear Services
Perform analyses for irradiated fuel bay (IFB) events at the Gentilly-2 nuclear power plant.
be compliant with regulatory requirements from the Canadian Nuclear
Safety Commission (CNSC), Hydro-Québec was required to perform detailed
safety analyses for irradiated fuel bay events at the Gentilly-2 nuclear
CANDU reactors, the irradiated fuel bay is outside the reactor
building. It is cooled by a dedicated system which uses the
recirculated cooling water. The postulated accidents are loss of flow,
loss of cooling and failure of a fuel bundle.
work consisted of identifying credible and limiting accident scenario,
define the methodology, develop the required models, perform analyses
including public dose calculations and verify that results meet the
acceptance criteria. Time available to the operator before design or
safety limits (IFB water temperature high alarm, start of boiling, fuel
uncovering) were met were also calculated. Specific scenarios that could
occur during IFB reparation work were also considered.
The work was contracted by Hydro-Québec to AECL (Atomic Energy of
Canada Ltd). Gilles Sabourin assumed technical supervision. Pascal
Hernu performed the dose calculations.
NOTE: This work was performed / lead by MNS personnel during their previous employment