Safety_Series_041_1975 - gnssn - International Atomic Energy ...

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88 A PPEN D IX IV
the continuous monitoring at the station located on the brookNovellino
(see Fig. 8) and the determinations on surface water samples
collected in the zone (Lake Maggiore, River Ticino).
The monitoring programme includes also: determination of
soil radioactivity, carried out in a score of locations within 15 km
of the Establishment; measurement of the activity in the bottom
sediments of the brook Novellino and of the Ispra bay of Lake
Maggiore; and follow-up of the contamination of some agricultural
products (grass, milk) and of fish (see Fig. 11).
Because of the presence on site of an installation for the treatment
and storage of radioactive solid wastes, underground waters
are also monitored by means of samples collected in wells located
both inside and outside the Establishment (see maps in Figs 7 and 11).
Table XVI provides a summary of the sampling and measurements.
4. Emergency monitoring
In the event of an accidental release of radioactivity into the
environment, an emergency plan has been developed in co-operation
with the national and local authorities. In such a case a monitoring
control centre is activated. This is located in a room equipped with
communication systems and where all the data and alarms from the
telemetering monitoring stations are centralized.
On the basis of the meteorological information, vehicles equipped
with a radio unit and portable instruments are sent along preestablished
routes to selected monitoring points in the sector (or
sectors) likely to include the contaminated area. The equipment
carried by the vehicles allows the collection and field measurements
on air, vegetation and milk samples and the direct evaluation of the
radioactivity deposited to the ground.
The standard equipment consists of a battery-operated high
volume air sampler with paper and charcoal filters, a singlechannel
Nal(Tl) gamma monitor, large area alpha and beta scintillation
detectors, a portable ionization chamber for exposure measurements,
tools for sample collection, and individual protective clothing.
5. Criteria on which the programme is based
The programme for the radioactivity monitoring in the environs
of the Ispra Establishment is conceived to achieve various objectives,
the relative importance of which may change. A detailed