Emergency Planning Zone Map:
Planning Zone Map (PDF)
Planning Zone Map (GIF)
experts and government agencies have worked to develop nuclear
power plant emergency response plans for all of the nuclear
power plants in the United States. As part of this planning,
the areas around the plants are divided into planning zones.
The Nuclear Regulatory Commission and Environmental Protection
Agency have determined that an Emergency Planning Zone (EPZ)
should be an area that is roughly a ten mile circle around
the nuclear power plant. The Federal Emergency Management
Agency (FEMA) has oversight responsibilities for emergency
planning within this approximate ten-mile area.
State of California expanded the Diablo Canyon Emergency Planning
Zone so that it is much larger than the Emergency Planning
Zone defined by the federal government. The expanded emergency
planning zone defined by the state is divided into twelve
smaller Protective Action Zones (PAZs). PAZs 1 through 5 correspond
to the ten-mile area where FEMA has primary oversight responsibilities
for emergency planning. The State has primary oversight responsibilities
for PAZs 6-12, outside of the ten-mile area. Residents in
PAZs 1 through 12 may be asked to take protective actions,
such as take shelter in their homes or evacuate if there is
a major emergency.
the twelve PAZs are three zones known as Public Education
Zones (PEZs). Residents in these areas are not likely to be
affected by an emergency at the power plant. However, since
residents in the PEZs (zones 13 through 15) are next to the
Emergency Planning Zone, general information about Diablo
Canyon is also provided to these residents.
Canyon has an emergency response plan that is tested regularly
and evaluated by federal officials. It is unlikely that an
emergency would affect the entire Emergency Planning Zone.
That is why it is divided into twelve smaller Protective Action
Zones (PAZs). PAZs help to organize emergency planning and
emergency response actions into areas that are familiar to
agencies and the public.
factors determine whether protective actions would be needed
for any of the PAZs during an emergency at Diablo Canyon.
The first is the amount of radioactive
material released. The second is the speed and direction
of the wind. Emergency Alert System (EAS) messages would broadcast
over local radio and television stations which zones might
be affected. They also would explain what residents in the
affected areas should do.