Radiological Dose Calculations for the Diode Region of the Light Ion Fusion Target Development Facility

Biological dose rate calculations have been performed for a point external to the diode vacuum casing of the proposed Light Ion Fusion Target Development Facility for times following an operational period of 1 month. The primary diode material considered is Type 304LN stainless steel, with an alternative material of Al-6061-T6. Using a realistic pulse-sequence calculation scheme to account for the pulsed operation mode of the facility, it is shown that for both the stainless steel and aluminum diodes the dose rates external to the diode vacuum casing are > 1 rem/h after a 1-day shutdown period. After a 1-week shutdown period, the dose rates have dropped to 90 and 12 mrem/h, respectively.