We have developed an improved system to measure Cs-137 in wildlife at the Savannah River Site. This field-portable system consists of a shielded 5 cm by 10 cm by 40 cm NaI detector controlled by an Ametek Ortec Digibase. Measurement of an animal’s radioactivity is made by placing the animal at a predefined location on the detector system for a one minute count-time. The counts, animal type, and animal weight are then used as inputs to an algorithm which calculates the amount of Cs-137 within the whole animal and within the edible meat portion of the animal. The results from these calculations are used to estimate the received dose from eating this animal and is included in the Savannah River Site’s Hunter Dose Tracking System. This system has a detection limit of 0.60 pCi/g (22.20 Bq/kg) with a typical measurement uncertainty of less than 0.32 pCi/g (11.84 Bq/kg).

我们开发了一种改进的系统，用于在萨凡纳河站点测量野生生物中的Cs-137。该现场便携式系统由受Ametek Ortec Digibase控制的5 cm x 10 cm x 40 cm NaI屏蔽探测器组成。通过将动物放在探测器系统上的预定位置一分钟的时间来测量动物的放射性。然后将计数，动物类型和动物体重用作算法的输入，该算法可计算整个动物内以及该动物的食用肉部分内Cs-137的量。这些计算的结果用于估计从食用该动物获得的剂量，并将其包含在萨凡纳河站点的猎人剂量跟踪系统中。该系统的检出限为0.60 pCi / g（22.20 Bq / kg），典型测量不确定度小于0。