On 26 November 2003, the fire alarm computer system for the University crashed. This system also carried the
MRB Irradiator alarms. The Radiation Control Office was informed of this malfunction on 28 November 2003, whereby RCO Staff checked the irradiators for users and found no one scheduled for operations of either machine. The system was restored to campus the following week and it was assumed that the alarm system was back on-line. All pre-use checks of the irradiators found no problems with the daily operation of either irradiator after the incident. However, the annual inspection whereby the alarm system is checked with CSUPD revealed the problem last week.
The malfunction of the alarm system was reported to the Radiation Safety Officer on 3 February 2004 after an annual inspection found the local alarms and interlocks working to the irradiator (automatic source retraction, audible and visual alarms), but not reporting an intrusion to the University Police Department. The alarms in question satisfy the requirements of CDPHE Regulation 19.8.2.
The Radiation Safety Officer requested to the Principal User that all work with each irradiator be stopped until the alarms could be repaired. The Principal User complied, with the request on 3 February 2004.
Reporting this incident to the CDPHE is pursuant to Regulation 19.29.15 for "inoperability of an access control system.
The system is being worked on by University Facilities Management and is planned to be operational by 6 February 2004. The system will be tested fully before operations are permitted to resume.