Volume 2 - Atomic Energy Regulatory Board

- Prevention of accidental fall of person and
material into the pool
- Prevention of syphoning action in pool
- Prevention of accidental entry into the room,
when the water level in the pool is low and when
the sources are in storage position.
- DM water plant capacity and type (anion,
cation, mixed bed etc.)
5.3 Ventilation - Volume of hot cell, including and excluding
high bay and low bay area
- Ventilation rate provided, anticipated minimum
air changes in the hot cell, high bay area, water
pool, low bay area
- Location and routing of ventilated ducts, fans,
duct size, etc. (give sketch), air handling units,
HEPA filters.
- Methods of monitoring ventilation and action
on ventilation failure
- Location of ventilation exhaust and the height
of stack above the hot cell roof. Prevention of
water flooding through ventilation ducts from
roof (sketch)
- Ozone concentration (maximum) anticipated in
the cell with ventilation ON and OFF. Time
duration in minutes for safe concentration of
ozone in the cell (0.1ppm) after the exhaust is
switched off.
- Prevention of entry to the hot cell when unsafe
limit of ozone concentration exists
- Details of safety interlock interlocks to retract
in case of ventilation failure
- Provisions for standby ventilation exhaust fans,
if any
5.4 Access Door - Design details of access door with material
used, thickness, its shielding adequacy
- Information on safety interlocks provided to
prevent human access to the hot cell when the
radiation sources are handled.
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