Criteria for Public Disclosure
1. The licensee shall provide the following routine emissions information to the public:
- airborne emissions of Ar-41 (NRU stack), updated quarterly with monthly results;
- airborne emissions of NOx and SOx (powerhouse stack), updated quarterly;
- airborne emissions of tritium (NRU stack), updated quarterly; and
- waterborne emissions of tritium (process sewer), updated quarterly.
Routine emissions information will be reported through CNL’s external website, www.cnl.ca, and updated as necessary. Posting will have a one period lag (i.e., no more than two months, preferably one month for Ar-41, and one quarter for others) to allow for processing of the samples, preparation of the information, and verification of the report.
2. The licensee shall periodically review and update the routine emissions report to reflect operational changes and feedback from interested stakeholders.
3. The licensee shall provide information to the public regarding non-routine items or events as specified below:
- Exceeding the action levels of the following radiological emissions:
- I.Argon-41 (air);
- II.Carbon-14 (air);
- III.Tritium (air);
- IV.Iodine-131 (air);
- V.Mixed Noble Gases (air);
- VI.Tritium (liquid);
- VII.Gross Alpha (liquid); and
- VIII.Gross Beta (liquid).
- Exceeding an action level for any other radiological emissions not specified in Section 3a, where it also exceeds 0.1% of the derived release limit.
- Exceeding the release limits for the following non-radiological liquid emissions from the Process Outfall:
- Unrecoverable loss of more than 10 kg of heavy water per day from the NRU Reactor;
- Loss of refrigerant as listed under the Federal Halocarbon Regulations greater than 100 kg;
- Significant interruption of isotope production and supply;
- Other events that could have offsite effects or result in media attention including fires, earthquakes, serious vehicle or industrial accidents, and significant business developments.
- Quarterly updates of event reports to the public through website.
An unrecoverable loss of heavy water implies release to the environment which may cause public concern.
4. Environmental and Performance Reporting
In addition to quarterly reporting and posting of “routine emissions”, noted in section one (1) above, CNL also prepares and posts an Annual Safety Report summarizing Environmental Monitoring for the Chalk River Laboratories.
This report reviews and summarizes the results of the Chalk River Laboratories (CRL) Environmental Monitoring Program (EMP) for a specified calendar year. CNL reports the monitoring results annually to the Canadian Nuclear Safety Commission (CNSC). The report is made available to the public.
These environmental performance reports are available via the Performance Reporting page found at www.CNL.ca.