10A NCAC 15 .0906         CONTROLS AND INTERLOCK SYSTEMS

(a)  Instrumentation, readouts, and controls on the particle accelerator control console shall be clearly identified and easily discernible.

(b)  All entrances into a target room or other high radiation area shall conform to the requirements of Rule .1601 of this Chapter.

(c)  When an interlock system has been tripped, it shall only be possible to resume operation of the accelerator by manually resetting the interlock that has been tripped.

(d)  Each safety interlock shall operate independently of all other safety interlocks.

(e)  All safety interlocks shall be fail‑safe, meaning that safety interlocks are designed so that any defect or component failure in the interlock system prevents operation of the accelerator.

(f)  A "Scram button" or other emergency power cut‑off switch shall be located and easily identifiable in all high radiation areas and at the control console. Such a cut‑off switch shall include a manual reset so that the accelerator cannot be restarted from the accelerator control console without first manually resetting the cut‑off switch.

History Note:        Authority G.S. 104E‑7;

Eff. February 1, 1980;

Amended Eff. January 1, 1994;

Transferred and Recodified from 15A NCAC 11 .0906 Eff. February 1, 2015;

Readopted Eff. October 1, 2025.