NSLS ESH Highlight #24

Lesson-learned from Recent NSLS Non-conformance

Date: April 26, 2001
Editor: R. Casey

Does this label look familiar to you and do you understand what it means?
We recently experienced a situation where personnel were inappropriately working within an electrical box identified with this label. The purpose of this ES&H Highlight is to ensure that all personnel at the NSLS who may encounter this label understand exactly what it means and what your obligation is.

Interlock systems are a key element of the personnel protection at the NSLS. There are about 70 radiation protection interlock systems at the NSLS, including those at the SDL and ATF. The purpose of these systems is to ensure that no one is accidentally exposed to the radiation fields that are present within the accelerator enclosures or beam lines when the accelerator is operating. It is important to maintain the integrity of these interlock systems. Any work on components of these systems must be done either by the Interlock Group, or under the supervision of the Interlock Group.

Entry to junction boxes or electronic chassis that are part of the interlock system by anyone other than a member of the Interlock Group is prohibited.These boxes are identified with the label shown above.If you find you need to get into such a box, you must contact the Interlock Group who will determine how to proceed.

If you have any questions or comments, please contact Scott Buda (x3914) or Tom Dickinson (x7196).