Nuclear facilities. Ventilation penetrationsfor shielded enclosures1 Scope This International Standard specifies the requirements for the construction and the installation of radiobiological shielding devices used as ventilation passages through shielded enclosures with concrete or leaded walls to protect against gamma radiation. This International Standard applies to all shielded containment enclosures used for handling radioactive products or material emitting penetrating radiation (gamma or neutrons) in such

the contents of which are mixed and the required mass extracted by increments

departures from specification

for underwater

This technical report covers grouping systems for the following standardized materials:

The pliers for gripping and manipulating illustrated in this International Standard are examples only and are not intended to affect the manufacturer's design

gas appliances and similar use

Precise definition of the classes is given in each particular regulation

sloping headrail

partitioning

d) to assist in tying-down odd-shaped cargo pieces where it is difficult or not allowed to directly attach tie-down straps or pass them around the load in an effective manner

and to machines using the Y/C video connectors (herein after referred to as S video connectors) for the measurement of the Y/C separated video signal

Such a declaration is not to be confused with third party certification of conformity