V3 is the value, in ml, of the exact volume (Veq ) of the silver nitrate solution corresponding to the titration of 5 ml of the potassium chloride standard reference solution used.

Titrate, using the microburette (4.4), adding initially 4 or 9 ml respectively of the silver nitrate solution corresponding to the standard reference potassium chloride solution used.

V2 is the value, in ml, of the exact volume (Veq ) of the silver nitrate solution corresponding to the titration of 10 ml of the potassium chloride standard reference solution used,

A thorough inquiry will be carried out in order to reconstruct the events leading to the inadvertent transport of a reference material containing 0.91g Plutonium in solution from the Joint Research Centre's Institute for Reference Materials and Measurements (IRMM) in Geel via the Euratom Safeguards Directorate in Luxembourg to Abingdon in England.

The Community frame of reference Specific solutions may be found within a Community frame of reference, on the understanding that any solution adopted must be in line with the rulings of the Court of Justice.

It further recommends that, under this system, special attention should be paid to ways of keeping the population adequately informed and of responding to public anxieties. As regards existing buildings: - a reference level should be fixed above which simple but effective measures for the reduction of the level of radon will be envisaged; - this reference level should correspond to an effective dose equivalent of 20 mSv a year; - the degree of urgency attached to the implementation of corrective measures should take account of the extent to which the reference level has been exceeded; - whenever corrective measures are considered nece ...[+++]ssary, the population should be informed of the levels of radon to which it is exposed and of the solutions whereby such levels can be reduced.