It is shown that the TSRM61 and TSRM82 radiation monitors produced at the Dukhov All-Russia Research Institute of Automatics (VNIIA) can be used for detecting the limit of the contamination of the clothing, footwear and skin of the personnel in radiation enterprises. The main radionuclides corresponding to the decay products of VVER, RBMK, and fast reactor fuel are examined.Pedestrian and vehicle radiation monitors are stationary means for detecting photon and (or) neutron radiation. They are placed at checkpoints in enterprises that manufacture, use or store nuclear and (or) radioactive materials. Some enterprises of this kind are equipped with pedestrian γ-radiation monitors of the type TSRM61 and TSRM82. Operation has revealed cases where such monitors have detected personnel contamination, which was the reason for studying the possibility of using these devices not only for their intended purpose of inventorying and monitoring nuclear materials but also for radiation monitoring.Preliminary assessments have shown that the TSRM61 and TSRM82 monitors can be used to detect significant contamination of personnel. A more complete study, from the standpoint of the radiation safety and monitor sensitivity norms, of the possibility of using them to detect the limit of the contamination of clothes, shoes, and skin of personnel at radiation enterprises is the objective of the present work. The decay products of VVER, RBMK, and fast reactor fuel are taken as the contaminants.The TSRM61 radiation monitor is intended for automatic detection of nuclear materials and radioactive substances by the detection of γ-radiation. It includes a power supply, control block, and detection blocks based on a 220 × 45 × 10 mm CsI(Tl) scintillators. The number of detection blocks (from 1 to 8) and the distance between them depend on the configuration of the monitored zone and the detection threshold requirements (Fig. 1).The monitor can be used to check moving and stationary objects of any group irrespective of the operating detection blocks. The algorithm used makes it possible to decrease the detection threshold with fixed sensitivity of an individual detection block, since the signals are analyzed according to combinations of pulses from different detectors.The TSRM82 monitor is an improved variant of TSRM61; the automation level and operational stability are higher, and the mass and size are smaller. Since the foundation of the detectors -type of scintillator and its dimensions -is the same for both systems, their sensitivity and detection threshold are the same (Table 1).For effective monitoring of personnel contamination, it is best to use eight detection blocks arranged in two columns along four blocks 5-10 cm from the surface of the body on the face and back sides. This permits monitoring personnel in a single standard position. The arrangement of the contaminated region can be determined by activation of one detector and the source itself with even higher accuracy with a group of detectors. The nominal designation of this modifica...
