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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Bahman Zohuri, Adrian S. Wright and Jennifer L. Lawrence
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DOI:10.17265/1934-8975/2026.03.001
1. Senior Technical Director, New Nuclear, 465 Dobbie Drive, Cambridge N1T1T1, Canada 2. Sales Manager, Mirion Technology, 465 Dobbie Drive, Cambridge N1T1T1, Canada 3. Engineering Manager, Mirion Technology, 465 Dobbie Drive, Cambridge N1T1T1, Canada
The measurement channel of a fission reactor extends beyond its neutron or temperature sensor. Its MI (mineral-insulated) cable, vessel penetration, under-vessel transition, grounding arrangement, receiver, power supply, and logic all contribute to the validity of the indicated value. This memorandum examines EMI (electromagnetic interference), EMC (electromagnetic compatibility), and EMP (electromagnetic pulse) for SPNDs (self-powered neutron detectors), thermocouples, LPRMs (local power range monitors), WRNMs (wide-range neutron monitors), and ex-core channels. The central engineering conclusion is that passive sensors and metal sheaths reduce some coupling but do not establish channel immunity. A plant-specific, end-to-end assessment must address conducted and radiated coupling, shared references, transient recovery, and failures common to redundant channels [1-5].
EMP (electromagnetic pulse), EMC (electromagnetic compatibility), EMI (electromagnetic interference), in-core instrumentation, ex-core neutron monitoring, SPNDs (self-powered neutron detectors), LPRMs (local power range monitors), WRNM (wide-range neutron monitoring), mineral-insulated cables, signal integrity.
Bahman Zohuri, Adrian S. Wright, and Jennifer L. Lawrence. Electromagnetic Pulse Interference and Compatibility of In-core and Ex-core Reactor Instrumentation (A Technical Memorandum). Journal of Energy and Power Engineering 20 (2026) 67-74. doi: 10.17265/1934-8975/2026.03.001.