TY - JOUR

T1 - Development of highly sensitive techniques for determination of concentrations of fission materials in water media using thin-layer inorganic sorbents and plastic track detectors

AU - Djakov, A. A.

AU - Rostovtsev, V. J.

AU - Betenekov, N. D.

AU - Ipatova, E. G.

PY - 1993/7/1

Y1 - 1993/7/1

N2 - A technique for determining the uranium concentration in the VVER-1000 primary coolant and natural fresh water was developed. Thin-layer inorganic sorbents on Ti and Ce hydroxides (thickness being tens of μg cm-2) were used for increasing the uranium concentration. After exposure in the experimental solution, thin-layer inorganic sorbents were irradiated by thermal neutrons when positioned in close contact with plastic track detectors; the latter were then etched electrochemically. A Lavsan film, 180 μm thick, was used as a detector for fission fragments. Detection sensitivity for uranium in ammonia-boron-potassium solution and distillate is a hundred or a thousand times higher than for the case of the track detector irradiated by neutrons directly in the solution. A detection limit for uranium in solutions is no worse than 3 × 10-12 g cm-3. It is defined, mainly, by a natural contamination of the sorbent by uranium. High sensitivity, a low detection limit, and simplicity of the technique in practice make it feasible for solving the problems of nuclear reactor radiation safety, radio-ecology and other research fields.

AB - A technique for determining the uranium concentration in the VVER-1000 primary coolant and natural fresh water was developed. Thin-layer inorganic sorbents on Ti and Ce hydroxides (thickness being tens of μg cm-2) were used for increasing the uranium concentration. After exposure in the experimental solution, thin-layer inorganic sorbents were irradiated by thermal neutrons when positioned in close contact with plastic track detectors; the latter were then etched electrochemically. A Lavsan film, 180 μm thick, was used as a detector for fission fragments. Detection sensitivity for uranium in ammonia-boron-potassium solution and distillate is a hundred or a thousand times higher than for the case of the track detector irradiated by neutrons directly in the solution. A detection limit for uranium in solutions is no worse than 3 × 10-12 g cm-3. It is defined, mainly, by a natural contamination of the sorbent by uranium. High sensitivity, a low detection limit, and simplicity of the technique in practice make it feasible for solving the problems of nuclear reactor radiation safety, radio-ecology and other research fields.

UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=0027634113

U2 - 10.1016/0969-8078(93)90228-V

DO - 10.1016/0969-8078(93)90228-V

M3 - Article

VL - 21

SP - 349

EP - 351

JO - Nuclear Tracks and Radiation Measurements

JF - Nuclear Tracks and Radiation Measurements

SN - 0969-8078

IS - 3

ER -