Point Lepreau Nuclear Station shuts down due to heavy-water leak

The Point Lepreau Nuclear Generating Station has undergone a second shutdown this month following the discovery of a heavy-water leak on an instrumentation line. The leak was identified after monitoring systems detected elevated levels of tritium, a radioactive isotope found in the heavy water used to transfer heat from the reactor to boilers.

NB Power reported that approximately 200 litres of heavy water were collected. The utility stated that the leak occurred on a 3/8ths-inch line within the reactor building. Officials emphasized that the material remained contained within the facility at all times, asserting there was no safety risk to the public, staff, or the environment. Most of the leaked heavy water was released as vapour and subsequently recovered through station processes.

According to the Canadian Nuclear Safety Commission, while tritium is a weak source of beta radiation that cannot penetrate skin, it can pose health risks if consumed in large quantities. Site officials noted that the early warning systems functioned as intended, allowing for a safe and predictable shutdown to facilitate repairs.