Canada

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INES-event

Information on earthquake which occurred in Western Québec

A magnitude 5.2 MN (Magnitude Nuttli) earthquake occurred on the morning of 2013/05/17 at 09:43 EDT (13:43:23 UT). The earthquake was felt at the Darlington NPP, Pickering NPP, as well as at the Chalk River Nuclear Laboratories.

No damage has been reported, licensees are confirming their operations have not been affected by the earthquake. As per procedures, licensees are completing a thorough review of station systems.

CNSC staff, both on site and in Ottawa, continue to monitor the event follow-up activities.

Category: Other Canada »

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Information on earthquake which occurred in Eastern Canada.

An earthquake occurred in parts of Southern Ontario and Eastern Québec on the afternoon of June 23, 2010. The earthquake was rated at 5.0 on the Richter Scale and was felt at the Darlington, Pickering and Gentilly-2 nuclear power plants, as well as at the Chalk River Laboratories.

All licensees have confirmed that their operations have not been affected by the earthquake. There is no indication nor anticipation of any impact for the stations. As per procedures, licensees are completing a thorough review of station systems to confirm.

Category: Other Canada »

Canada sets bad example with Chalk River reactor: British magazine, expert

Wednesday, January 30, 2008

Canada's decision to restart the nuclear reactor at Chalk River, Ont., has prompted stinging criticism in Britain that Ottawa is setting a poor example for other countries.

The British magazine "New Scientist" says Canada is "sending out a dangerous message over nuclear safeguards."

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Total Impairment of the High Pressure Emergency Core Injection System Affecting Five (5) Reactor Units at Pickering NGS

On August 14, 2003, Pickering Nuclear Generating Station experienced a loss of Bulk Electrical System (BES) event. This event was caused by a blackout that affected the electric grid supplying the Province of Ontario, Canada, and parts of the United States. As a result, all eight reactor units at Pickering A and B experienced a total loss of the on-site electric power (Class IV power).

Category: Power Reactor Canada »

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Incidents of Radioactivity in Consumer Products

Three incidents of radioactivity in consumer products were brought to the attention of the Radiation Protection authorities in Canada. The products involved were stainless-steel thermoses, canisters and watch bands. The components found to be contaminated with cobalt-60 were the clips holding the handles to the thermos body, the ring holding the canister lid in place and the spindles (pins) in metal watch bracelets. The contaminated watches and thermoses originated in the People's Republic of China. The origin of the canister is unknown.

Category: Other Canada »

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Empty Pressure Tube Damaged During Routine Maintenance

Unit 6 was in the guaranteed shutdown state and Spring Location and Relocation (SLAR) tool was being used in the pressure tubes as part of the planned fuel channel maintenance. While performing SLAR operation in fuel channel G12, an electrical fault in the tool resulted in a discharge of electric energy that caused damage to both the pressure tube and the calandria tube. The tool was retracted and it was later determined that the Primary Heat Transport System (PHTS) coolant was leaking into the moderator.

Category: Power Reactor Canada »

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Start-up Instrumentation Impairment

Unit 7 was being started up after a long planned shutdown. The startup involved removing “poison” from the unit’s moderator. The “poison” is a material added to the moderator to keep the reactor sub-critical. When the poison was being removed and the neutron activity began to increase, the start-up instrumentation failed to show any effect. Bruce Power operations staff recognized this instrumentation failure while the unit was still deeply sub-critical and returned the unit to the over-poisoned shutdown state.

Category: Power Reactor Canada »

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Heat Transport Steam Bleed Valve Failed Open Causing Unit Trip

At 20:57 on November 11, 2001, while Darlington Unit 3 was at 98% FP, a Heat Transport (HT) pressurizer bleed valve (633333-CV8) failed open. A unit automatic power reduction occurred on high bleed condenser pressure, followed by a Shutdown System #1(SDS1) trip on HT low pressure. Heat Transport Pressure dropped to approximately 5 to 5.5 MPa (g) and remained there for 15 minutes. Emergency Coolant Injection channel logic signals were initiated due to HT low flow, that sealed on 1 of 3 channels (functioned as per design), and no injection occurred.

Category: Power Reactor Canada »

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Exposure to radiation from a fixed gauge in New Waterford Nova Scotia

On July 23, 1999 a maintenance worker at Cape Breton Development Corporation (DEVCO) inadvertently; handled a radioactive source that should have been contained in a gauge at the plant. DEVCO took immediate steps to deal with the device, and to reconstruct the incident and the maintenance activities so more accurate dose estimates can be obtained.

Category: Radiation Source Canada »

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Plutonium uptake at Chalk River Facilities

On May 26, 1999, four AECL employees entered a controlled radiological zone to perform work on a ventilation system. The work involved the removal of a component (baffle box) in a room in a building that contained a plutonium processing facility. The facility has been non-functional since 1957, and remained in a dormant state in preparation for decomissioning.

Category: Research Facility Canada »