This paper discusses an intercomparison campaign performed in the mixed radiation field at the CERN-EU (CERF) reference field facility. Various instruments were employed: conventional and extended-range rem counters including a novel instrument called LUPIN, a bubble detector using an active counting system (ABC 1260) and two tissue-equivalent proportional counters (TEPCs). The results show that the extended range instruments agree well within their uncertainties and within 1σ with the H*(10) FLUKA value. The conventional rem counters are in good agreement within their uncertainties and underestimate H*(10) as measured by the extended range instruments and as predicted by FLUKA. The TEPCs slightly overestimate the FLUKA value but they are anyhow consistent with it when taking the comparatively large total uncertainties into account, and indicate that the non-neutron part of the stray field accounts for ∼30 % of the total H*(10).

CERN Geneva 23 CH 1211 Switzerland

CERN Geneva 23 CH 1211 Switzerland Department of Physics University of Liverpool Liverpool L69 7ZE UK

Department of Energy Politecnico of Milan Via Ponzio 34 3 Milan 20133 Italy

Department of Radiation Dosimetry Nuclear Physics Institute of the ACSR Na Truhlářce 39 64 Prague 180 00 Czech Republic Faculty of Nuclear Sciences and Physical Engineering Czech Technical University Prague Břehová 7 Prague 115 19 Czech Republic

Helmholtz Zentrum Berlin BESYY 2 Berlin 12849 Germany

Pacific Northwest National Laboratory Richland WA 99352 USA

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