THE EURATOM WORKING GROUP ON REACTOR DOSIMETRY AND THE ASTM-EURATOM SYMPOSIA The Euratom Working Group on Reactor Dosimetry (EWGRD) started around 1960 with members having been nominated by the governments, from each European la­ boratory working in reactor physics and technology. The goal was to exchange di­ rectly experience and know-how in reactor dosimetry and related programmes. A need for normalisation was felt in order to guarantee that: the same nuclear data is used; measurements in different laboratories give the same results (need for in­ tercalibration experiments and standards); results are expressed such that a com­ parison with results from other laboratories is possible. In sub-groups, specific arguments were discussed resulting in final recommenda­ tions. These final recommendations were then discussed in a plenary meeting and accepted as a recommendation for European usage. Several of these recommenda­ tions were published, e.g. radiation damage dosimetry guidebooks, and a nuclear data guidebook. Also a programme, executed by the BCMN GEEL, for the produc­ tion and selling of Reference Materials for Neutron Dosimetry is sponsored by the EWGRD. Workshops in the field of radiation damage and on the pressure vessel steels programme in Europe were successfully organised. The group works in close contact with ASTM (American Society for Testing of Mate­ rials). Altogether seven symposia were jointly organized, and held, alternatively in Europe and USA. The next symposium, the eighth, will be organized by ASTM in 1993 in the USA.

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