Radiation Safety Interlock System Configuration Management Overview
Explore the operational experience panel discussion on interlocks, access controls, and configuration management in radiation safety systems. Learn about the requirements, hardware, system integration, and change control processes involved in managing a comprehensive interlock system for radiation safety.
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Presentation Transcript
Operational Experience Panel Discussion Interlocks, Access Controls, and Configuration Management John E. Anderson Jr. 2014 Accelerator Safety Workshop 6 August 2014
Overview Program and Requirements Systems in Use Configuration Management Cyber Security 2 John E. Anderson Jr.| Operational Experience Panel Discussion 6 August 2014
Program Radiation Safety Interlock System (RSIS) Requirements flow down through the Fermilab Radiological Control Manual (FRCM) Chapter 10 Radiation Safety Interlock Systems Defines Scope Authorities and Responsibilities Hardware Requirements Failsafe, Redundancy, Diversity Required Procedures Key Accountability, Search and Secure, Maintenance, Repair, Certification Testing, Interlock Bypass 3 John E. Anderson Jr.| Operational Experience Panel Discussion 6 August 2014
Systems Radiation Safety Interlocks and Access Controls are an integrated system Systems cover ~7 miles of beamline enclosures 86 Access points, 65 Emergency exits, and 56 Enclosure to Enclosure boundary gates 40+ year laboratory history, wide variety of technologies deployed Relay logic systems Solid State, EPLD and CPLD logic Microcontrollers Safety Certified Programmable Logic Controllers (PLC) PLC systems used to perform safety functions within the overall RSIS 4 John E. Anderson Jr.| Operational Experience Panel Discussion 6 August 2014
Systems Systems designed in a building block model From system specification, can pick and choose different modules to assemble and integrate a system Same system components are used for Laser safety systems Provides a consistent look and feel for users 5 John E. Anderson Jr.| Operational Experience Panel Discussion 6 August 2014
Configuration Control Interlock Change request form Change requests stored in a database Usually initiated by the RSO Reviewed by the Interlock Engineer Approved by Accelerator Division (AD) ESH Department Head Form has an entry for items requiring independent review and approval Changes reviewed for possible USID 6 John E. Anderson Jr.| Operational Experience Panel Discussion 6 August 2014
Hardware Enclosure entry doors are locked Keys for entry obtained through the Main Control Room Interlock hardware is secured inside locked cabinets Chassis based modules are clearly labeled as safety system components Only personnel authorized in writing by the AD Head have access to keys System drawings maintained by the Electrical/Electronic Drafting Department 7 John E. Anderson Jr.| Operational Experience Panel Discussion 6 August 2014
Interlock System Software Software configuration management Source code maintained on server accessible to interlock group personnel only PLC, Microcontroller, EPLD, and CPLD Code Microcontroller, EPLD, and CPLD Code verified through initial build bench testing PLC program signature is verified as part of the semiannual certification testing PLC firmware is verified against vendor firmware release prior to beginning certification testing PLC programming software is on a subscription Vendor sends notification of programming software updates 8 John E. Anderson Jr.| Operational Experience Panel Discussion 6 August 2014
Cyber Security PLC systems use UDP broadcast to transmit internal status information to data acquisition and display computer PLCs behind the accelerator control system firewall Requires two tier authentication to get behind firewall PLC network does not allow incoming traffic Incoming traffic is stopped at the router Single laptop used for firmware updates and program download 9 John E. Anderson Jr.| Operational Experience Panel Discussion 6 August 2014
