APPLICATION OF ALANINE/ESR SPECTRUM SHAPE CHANGE IN GAMMA DOSIMETRY

다국어 초록 (Multilingual Abstract)

Alnine pellets were installed in a nuclear power plant for one or two operation cycles and measured by electron spin resonance (ESR) spectrometers for dosimetry. Dose and “x/y ratio”, i.e., satellite peak over main center peak ratio, were measured for the returned alanine dosimeters from the nuclear power plant and compared to the values of reference alanine dosimeters exposed only to gamma rays. The variation of the x/y ratio change depended on the population of radicals from each radiation component with different LET. The gamma dose in a mixed radiation field was estimated by an additive gamma ray irradiation experiment and the measured dose rate at specified locations in the containment building.

참고문헌 (Reference)

1 B. Ciesieelski, "The effects of boron on the electron paramagnetic resonance spectra of alanine irradiated with thermal neutrons" 144 : 59-63, 1995

2 B. Ciesielski, "The effects of Dose and Radiation Quality on the shape and Power Saturation of the EPR Signal in Alanine" 140 : 105-111, 1994

3 B. Ciesielski, "The effect of High-Linear Energy Transfer Ions on the Electron Paramagnetic Resonance Signal in Alanine" 150 : 469-474, 1998

4 K. Mehta, "Reference Dosimeter system of the IAEA" 46 (46): 1247-1250, 1995

5 J. M. Dolo, "Progress in Quality Control of Alanine Dosimeters" 47 (47): 1165-1168, 1996

6 F. Hanisch, "Effects of Radiation types and dose rates on selected Cable-insulating materials" 30 (30): 1-9, 1987

7 IAEA, "Assessment and management of ageing of major nuclear power plant components important to safety: Incontainment instrumentation and control cables" International Atomic Energy Agency 2000

8 A. Cecilla, "Alanine and TLD coupled detectors for fast neutron dose measurements in neutron capture therapy(NCT)" 110 (110): 637-640, 2004

9 E.Malinen, "Alanine Radicals,Part 4:Relative Amounts of Radical Species in Alanine Dosimeters after Exposure to 6-19Mev Electrons and 10Kv-15Mv photons" 150 : 149-153, 2003

10 E. Malinen, "Alanine Radicals, Part 3: Properties of the components contributing to the EPR spectrum of x-irradiatied alanine dosimeters" 159 : 23-32, 2003

11 M. Z. Heydari, "Alanine Radicals, Part 2: The composite Poly crystalline Alanine EPR Spectrum Studied by ENDOR, Thermal Annealing and Spectrum Simulations" 106 : 8971-8977, 2002

12 V. Nagy, "Advancements in accuracy of the alanine dosimetry system: Part 2: The influence of the irradiation temperature" 57 : 1-9, 2000

13 American National Standard Institute, "ASTM E 1607-96, Standard practice for use of the Alanine- EPR dosimetry system"