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Division Spotlight
Decommissioning & Environmental Sciences
The mission of the Decommissioning and Environmental Sciences (DES) Division is to promote the development and use of those skills and technologies associated with the use of nuclear energy and the optimal management and stewardship of the environment, sustainable development, decommissioning, remediation, reutilization, and long-term surveillance and maintenance of nuclear-related installations, and sites. The target audience for this effort is the membership of the Division, the Society, and the public at large.
Meeting Spotlight
International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver Downtown
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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May 2025
Latest News
Argonne’s METL gears up to test more sodium fast reactor components
Argonne National Laboratory has successfully swapped out an aging cold trap in the sodium test loop called METL (Mechanisms Engineering Test Loop), the Department of Energy announced April 23. The upgrade is the first of its kind in the United States in more than 30 years, according to the DOE, and will help test components and operations for the sodium-cooled fast reactors being developed now.
Michael T. Rowland, Raja Abdul Raja Adnan, J. Scott Purvis, (IAEA)
Proceedings | Nuclear Plant Instrumentation, Control, and Human-Machine Interface Technolgies (NPIC&HMIT 2019) | Orlando, FL, February 9-14, 2019 | Pages 1649-1658
Computer security (or Cyber Security) of I&C systems (i.e. sensitive digital assets) at nuclear facilities is of increasing importance based upon the adoption of cyber-attacks as a key component of a potential adversary’s Tactics, Techniques and Procedures (TTPs). This new capability (i.e. to launch cyber-attacks) demands that operators of nuclear facilities put in place a programme and measures ensure protection of I&C systems. However, given that resources and time are limited, operators need to apply their limited resources in a manner that maximizes the security benefit. The International Atomic Energy Agency (IAEA) recognizes the need for efficient and effective approaches to security. IAEA Nuclear Security Series (NSS) Fundamentals NSS 20 [1], Essential Element 9: Use of Risk Informed Approaches states “A nuclear security regime uses risk informed approaches, including in the allocation of resources for nuclear security systems and nuclear security measures and in the conduct of nuclear security related activities that are based on a graded approach and defence in depth.” For computer security, the IAEA defines the concepts of computer security levels and computer security zones in NSS 17 [2]. Computer security levels exist as a requirements specification that details the constraints and conditions imposed that must be met to ensure that appropriate protection is provided to sensitive digital assets. Each individual computer security level will require a graded level of effort (i.e. allocated resources), level of confidence in measures, and a level of adherence to requirements (or procedures) when conducting activities that may affect computer security. Computer security zones have logical and/or physical boundaries for which a common set of requirements (i.e. computer security level) are imposed or applied. Computer security zones exist and consists of boundaries, devices and measures that are observable and/or measurable. The arrangement of computer security zones within a defensive computer security architecture ensure that defence-in-depth is achieved. The purpose of this paper is to provide an overview of IAEA guidance on the application of a graded approach and defence in depth to computer security at nuclear facilities. The paper will also discuss the concepts of computer security levels and zones as found in IAEA Nuclear Security Series (NSS) publications on computer security.
