Collusion: Secret agreement or cooperation especially for an illegal or deceitful purpose. More.

Culture: The way of thinking, behaving, or working that exists in a place or organization (such as a business). More.

Design Basis Threat (DBT) : The attributes and characteristics of potential insider and/or external adversaries, who might attempt unauthorized removal of nuclear material or sabotage, against which a physical protection system is designed and evaluated. More.

Improvised Nuclear Explosive Devices: A device incorporating radioactive materials designed to result in the formation of a nuclear-yield reaction. Such devices may be fabricated in a completely improvised manner or may be an improvised modification to a nuclear weapon. More.

Insider: One or more individuals with authorized access to associated facilities or associated activities or to sensitive information or sensitive information assets, or one or more individuals with nuclear security responsibilities who could commit a malicious act or who could aid an external threat to do so. More.

legal framework: A State's legal system providing the legislative and regulatory framework that supports the sensitive nature of nuclear security information. More.

nuclear security: The prevention and detection of, and response to, theft, sabotage, unauthorized access, illegal transfer or other malicious acts involving nuclear or other radioactive substances or their associated facilities. It should be noted that 'nuclear security' includes 'physical protection.' More.

nuclear security culture: the assembly of characteristics, attitudes and behavior of individuals, organizations and institutions which serve as a means to support and enhance nuclear security. More.

nuclear security regime: includes a range of elements and activities to support nuclear security. More.

Nuclear Terrorism: An act of terrorism in which a person or persons belonging to a terrorist organization detonates a nuclear device. Some definitions of nuclear terrorism include the sabotage of a nuclear facility and/or the detonation of a radiological device, colloquially termed a dirty bomb, but consensus is lacking. More.

Organizational Culture: The values and behaviors that contribute to the unique social and psychological environment of an organization. More.

Outsider: An adversary other than an insider. More.

Physical Protection : Measures (including structural, technical and administrative protective measures) taken to prevent an adversary from achieving an undesirable consequence (such as radiological sabotage, or the unauthorized removal of nuclear or other radioactive material in use, storage or transport) and to mitigate or minimize the consequences if the adversary initiates such a malicious act. More.

Radiological Dispersal Devices (RDDs): A device to spread radioactive material using conventional explosives or other means. More.

Radiological Exposure Devices (REDs: A device with radioactive material designed to intentionally expose members of the public to radiation More.

Sabotage: Any deliberate act directed against an associated facility or an associated activity that could directly or indirectly endanger the health and safety of personnel, the public, or the environment by exposure to radiation or release of radioactive substances. More.

Safety culture: that assembly of characteristics and attitudes in organizations and individuals which establishes that, as an overriding priority, protection and safety issues receive the attention warranted by their significance. More.

Security Culture: The organizational attitude that lends the prioritization of security issues to company policy. More.

Security Policy: State established regulations based on a current threat level, taking into consideration international and national aspects. More.

Self-Assessment: When an organization uses external services to perform an examination of company safety and security problems that may not be seen internally. More.

Subculture: A minority that has a different belief or behavior when compared to the organizational whole. More.

Threat: A person or group of persons with motivation, intention and capability to commit a malicious act. This is synonymous with nuclear security threat. More.