Development of two mobile laboratories for a routine and accident monitoring of internal contamination

Age-Specific Experimental and Computational Calibration of Thyroid <italic>in vivo</italic> Monitoring

“…The sodium iodine (NaI(Tl)) detector considered in this study is used in IRSN mobile units for thyroid measurements in case of emergency, typically a reactor accident affecting a large population. The fleet of mobile units is described elsewhere [2]. The detector model is a 51B25/2M from Scionix, it consists of a 2"x1" crystal encapsulated in 0.4 mm aluminum crystal housing.…”

“…In a previous work [1] this set has been used to measure age specific counting efficiency of the NaI(Tl) detectors of the light emergency mobile units of IRSN [2]. For that purpose 133 Ba was used as a surrogate of 131 I and a single efficiency value was obtained at the photopeak energy of 133 Ba.…”

Development of a microcalorimeter for measurement of L X-rays emitted from transuranium elements

“…Table 1 lists the energies of the L X-rays emitted from 238 Pu, 241 Am, and 244 Cm, which are representative transuranium (TRU) elements. For these L X-rays, accurate spectrum measurement is of significant interest for basic decay data evaluation [1], nuclear safeguarding [2], and intake exposure evaluation [3] because it can provide non-destructive elemental information. In general, the L X-ray spectrum is measured by a high-purity germanium (HPGe) detector or a silicon-lithium detector.…”

Development of a fleet of mobile units for Accident Monitoring of Internal Contamination: application in the frame of Fukushima accident

“…They are equipped with more sophisticated in vivo systems able to answer to crisis involving more complex contaminations (such as actinides or multi-gamma contaminations). Technical details and performances are given in Franck et al [1]. A general view of this expertise truck is given in Figure 5.…”

“…Besides, the mobile system will allow members of the public who may have been exposed because of their proximity to the accident to be monitored with the minimum of delay and inconvenience. Like for medical surveillance [1], rapid monitoring is also important because many radionuclides which may be present are short-lived and the seriousness of the accident will need to be quickly assessed.…”