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SECTION VII 27
e sp e cia lly in the case of alpha and pure beta em itters and
w here a v ery sm all low er lim it of detection is requ ired.
705. The ability to cater for em erg en cy situations w ill also affect
the equipment required as in these situations em phasis must
be given to a g reater speed o f analysis at higher levels of
activity than those n orm ally encountered.
706. As it is n ecessa ry to p erform lo w -le v e l counting in these
fa cilitie s , it is im portant that they be located at som e distance
from a n uclear fa cility in which an em ergen cy situation might
a rise .
A dditional item s
707. A dditional basic elem ents to be talen into account in the
organization of lo ca l m onitoring include: The validation of
data, the analysis of data fo r sign ifica n ce, the dissem ination
o f data, and the storage of data fo r later retrieval.
R ecordin g and evaluation of results
708. The requirem ents may vary from a sim ple form o f 'b o o k ­
keeping' to a com puter program m e in the case of a la rg e,
varied environm ental p rogram m e involving frequent sam pling.
An essen tial fa ctor in evaluating the results is the a ccu ra cy
of the m easurem ents and to this end suitable checks w ill be
n e ce ssa ry [7]. Some of the item s which should be record ed
are indicated in Annex I.
These include:
(1) Checks on the instrum ent perform an ce
- frequent checks on its respon se and efficie n cy by the
use of standard sou rces (severa l tim es in 24 hours)
- repeated counting o v e r sh orter p eriod s rather than
single counting over a long period
(2) Checks on the analytical techniques
- regu lar m easurem ent of blank sam ples
- m easurem ent o f split sa m p les, at least over 10% of
the total
- com p arison of resu lts obtained by different methods
- m easurem ent o f referen ce sam ples
- in tercom p arison s with other la b ora tories.
709. It is recom m ended that the review , evaluation and appropriate
m odification of program m e design, organization and im plem en -