35th Annual CNS Conference - 2015 May 31 - June 3

Presented at:
35th Annual CNS Conference
2015 May 31 - June 3
Saint John, Canada
Session Title:
2A4 - Advanced Reactor Designs

R. Hart (Northern Nuclear Industries Incorporated)


Northern Nuclear Industries Incorporated (N2 I2) is developing Small Modular Reactors (SMRs) called LEADIR-PS, an acronym for LEAD‑cooled Integral Reactor-Passively Safe.  LEADIR-PS integrates proven technologies including TRISO fuel, Pebble Bed core and graphite moderator, with molten lead coolant in an integral pool type reactor configuration to achieve unprecedented safety and economics.  Plants under development are LEADIR-PS30, producing 30 MWth, LEADIR-PS100 producing 100 MWth and LEADIR-PS300 producing 300 MWth that are focused on serving the energy demands of areas with a small electrical grid and/or process heat applications.  A plant consisting of six LEADIR-PS300 reactor modules serving a common turbine-generator, called the LEADIR-PS Six-Pack, is focused on serving areas with higher energy demands and a robust electricity grid.

The Gen+ I LEADIR-PS plants are inherently/passively safe.  There is no potential for a Loss Of Coolant Accident, a reactivity transient without shutdown, a loss of heat sink, or hydrogen generation.  No active systems or operator actions are required to assure safety.   The unprecedented safety of LEADIR-PS reactors avoids large exclusion radius and demanding evacuation plan requirements. 

LEADIR-PS, with steam conditions of 370 oC and 12 MPa can serve over 85% of the world’s non-transportation process heat demands.  In Canada, the electricity and process heat demands, ranging from those of remote communities and the oil sands to densely populated areas can be served by LEADIR-PS

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