[en] In this paper the leaden fish form sediment concentration gauge detector, the radiation source automatics and the seal structure are described

[en] An α and β radiation measuring system of simultaneously counting emissions from up to four samples is described. The primary detectors consist of the new low background α and β scintillators of model ST1221 and the low noise PM tube of model GDB-52LD. A single 300 mm x 5 mm plastic scintillator is used as guard detector, ⁹⁰Sr-⁹⁰Y β counting efficiency is 60% with typical background of 0.03 cm^-2·min^-1, αcounting efficiency for ²³⁹Pu is 70% with background of 0.03 cm^-2·h^-1. This instrument is compatible with microcomputer of any type. Measuring and data processing are controlled by computer

[en] Model BH1217B double channel measuring instrument for monitoring weak α and β radiation with large area semiconductor detector are described. In case of 2π detection efficiency ≥85% (typical value 90%) for ²³⁹Pu with typical background of 0.015 cm^-2·h^-1 and ≥40% (typical value 50%) for ⁹⁰Sr-⁹⁰Y with typical background of 0.03 cm^-2·h^-1. Counting efficiency for α entering β channel: <1%, and for β entering α channel: 0. Data collection, control and processing are all completed by computer

[en] In this paper a brief description was given to the structure principle of the detector unit and the model FJ-369 TLD reader. The common trouble and its trouble shooting of the detector unit were listed, and the structure of the detector unit of the advanced model FJ-377 TLD reader was introduced as well

[en] A high-sensitive equipment monitoring leakage of the reactor fuel elements has been developed. The delayed neutrons emitted from fission product-pioneer nucleus are monitored in the 1st circle water. An array of ³He proportional counter tubes is designed as a neutron detector for delayed neutrons, the detection geometry of which is near to 4π. In order to reduce the influence of interference factors the monitoring of fission product is carried out with 75s delay. The ⁸⁷Br delayed neutron pioneer nucleus is chosen as a monitoring object. The neutron detection efficiency of the developed equipment is 6.1%, which is 3 times higher than one of all available advanced equipment of the same function both at home and abroad

[en] A newly developed Model BH1217B double channel measuring instrument with large area semiconductor detector for monitoring low level α β radiation has been described. For ²³⁹Pu α source, in case of 2π detection, efficiency ratio ≥90% (typical value 98%), background ≤0.0008/cm²·min(typical value 0.0001/cm²·min). For ⁹⁰Sr-⁹⁰Y β source, in case of 2π detection efficiency ratio ≥45% (typical value 60%), background ≤0.008/cm²·min (typical value 0.03/cm²·min). Counting efficiency for α entering β channel: ≤1% (typical value 0.2%), and for β entering α channel: 0. Data collection, data control and data processing are all completed by computer

[en] Model FT631 Moisture/Density Combined Gauge has been developed, with which both water content and density, the two parameters of measured medium (soil), are obtained in one act of measurement at the same time. A China patent has been taken for this invention

[en] The Anti-Compton Shield Detector of model FJ422 is introduced. Being used with the ORTEC's HPGe detectors, in the absence of shield, it gives a suppression coefficient of 4.5 to 5.5 in the energy region of 50 to 100 keV for ⁶⁰Co. The total absorption coefficient of the BGO is compared to that of NaI(Tl), but its volume decreases by 80%

[en] A new type of compensated neutron logging probe with glass scintillators has been designed. High sensitivity, long plateau and stability are the features of this probe which differs from the probes with ³He or LiI(Eu) detector. From the results of field application the measured porosity is in good correspondence with the one obtained by rock core sampling method

[en] The authors present and α and β radiation system of counting emission from up four samples simultaneously. The primary detectors are made of the new low background α and β scintillator of model ST 1221 and the low noise PM tube model GDB-52LD. A single 300 mm x 50 mm plastic scintillator is used as guard detector. ⁹⁰Sr-⁹⁰Y counting efficiency is 60% with typical background of 0.03/cm² · min, counting efficiency for ²³⁹Pu is 70% with background of 0.03/cm²· h. This instrument is compatible with microcomputer of any type. Measuring and data processing are controlled by computer