Report a Safety Concern
Search

The U.S. Nuclear Regulatory Commission is in the process of rescinding or revising guidance and policies posted on this webpage in accordance with Executive Order 14151 Ending Radical and Wasteful Government DEI Programs and Preferencing, and Executive Order 14168 Defending Women From Gender Ideology Extremism and Restoring Biological Truth to the Federal Government. In the interim, any previously issued diversity, equity, inclusion, or gender-related guidance on this webpage should be considered rescinded that is inconsistent with these Executive Orders.

Home NRC Library Document Collections Events, Reports Associated with Part 21 Reports 1996

Part 21 Report - 1996-090

 
 


ACCESSION #: 9512180157



P. O. Box 5247             Omnitron

3409 West Prien Lake Road   International, Inc. Telephone: (318) 474-0505

Lake Charles, Louisiana 70606                         Fax: (318) 478-6218



December 6, 1995



Document Control Desk

U. S. Nuclear Regulatory Commission

Washington, DC 20555



Re:  Part 21 - Reporting of Defects and Noncompliance

     Omnitron Report # 0101 Addendum



Subject:  Incident at Indiana Regional Cancer Center, November 1992

          NRC Report NUREG-1480



Dear Madam or Sir:



Pursuant to 10 CFR 21 and a request from Mr. Larry W. Camper, Office of

Nuclear Materials Safety and Safeguards, Omnitron International Inc.,

reports the following additional information to be added to the report

dated March 16, 1993:



     Device



     Model 2000 HDR Treatment System, Afterloader S/N 100, Source Wire,

     Model SL 777.



     Additional Information



     In response to NRC comments the Afterloader software has been

     changed as follows:



     After any emergency DC motor retraction, the Afterloader is

     inoperable until serviced, an alarm is sounded, and below error

     message is displayed in a red box on the console monitor screen

     until cleared by medical personnel:



          CHECK RAD MONITOR, Backup retract motor activated

          POSSIBLE EMERGENCY!, verify source in safe



          UNRESETTABLE ERROR - - CALL OMNITRON SERVICE CENTER



     During an emergency DC motor retraction the length of the wire is

     not recorded as all components that could in any way restrict the

     movement of the wire are retracted from making contact with the

     wire.  This retraction includes the encoders that measure the wire

     length.  This is as designed to ensure that the DC motor will always

     be capable of pulling the active wire back.



Letter to U. S. NRC, 12/06/1995

Page 2



The above change was implemented in September of 1993 and all licensed

users were notified of the change.  This change was not implemented as a

result of any failure of the system but was done to further assist

medical personnel to understand what should be done when the Backup

Retract Motor activates.



Omnitron will be responsive to any comments or suggestions the NRC may

have regarding this report.



Regards,



Sam Lott, Ph.D.

RSO



SL/ae



*** END OF DOCUMENT ***

Page Last Reviewed/Updated Wednesday, March 24, 2021