REGDOC-3.6, Glossary of CNSC Terminology - Glossary - G

See generic action item.

Penetrating electromagnetic radiation emitted from an atom’s nucleus. Also called gamma rays.

See industrial radiography.

See gamma radiation.

global assessment report; see global assessment

gigabecquerel, that is, 10⁹ becquerels; see becquerel.

Any person who is not designated as a nuclear energy worker.

A mechanism to track safety issues, where the issues are generic to the class of facilities and have been singled out by the Commission as requiring corrective action by the licensee within a reasonable time frame.

A neutron generator used in a borehole to measure the various geophysical properties of subsurface rock formations.

10⁹ becquerels; see becquerel.

With respect to nuclear criticality safety, the fraction of the interior volume of a Raschig ring-filled vessel that is occupied by the glass in the rings.

An overall risk judgment on the acceptability of continued operation of a nuclear facility.

A method or process by which elements such as the level of analysis, the depth of documentation and the scope of actions necessary to comply with requirements are commensurate with:

• the relative risks to health, safety, security, the environment and the implementation of international obligations to which Canada has agreed
• the particular characteristics of a nuclear facility or licensed activity

The application of approved response force options following the RCMP incident management/intervention model or approved equivalent provincial police model.

The International System of Units (SI) unit of measurement used to express absorbed dose. One gray is defined as the absorption of 1 joule of ionizing radiation by 1 kilogram of matter. For gamma and beta radiations, the gray is numerically equal to the sievert.

The lowest-energy and most-stable state of an electron.

See safeguarded nuclear material.

See guaranteed shutdown state.

A reactor state with sufficient negative reactivity to ensure subcriticality in the event of any process failure and for which administrative safeguards (that is, reactor shutdown guarantees), approved by the senior operations authority and with which the CNSC concurs, are in place to prevent net removal of negative reactivity. See also safe shutdown state, shutdown state.

See projection sheath.

See projection sheath connector.

gigawatt‑days

See gray.