Ten years implementation of NDAS program in China

• Published in: Radiation physics and chemistry (1993) Vol. 52; no. 1; pp. 527 - 531
• Main Author: Juncheng, Gao
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Oxford Elsevier Ltd 01.06.1998; Elsevier
• Subjects: Alanine dosimetry; Applied sciences; dose assurance service; ESR spectroscopy; Exact sciences and technology; General aspects; high-dose dosimetry; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Legislation. Standardization; Metrology; Metrology, measurements and laboratory procedures; Physics; transfer standard; Units and standards; X- and γ-ray instruments and techniques; China; transfer standard; ESR spectroscopy; dose assurance service; high-dose dosimetry; Alanine dosimetry; Gamma dosimetry; Standardization; Measuring methods; Alanines; Irradiation plants; Experimental study; EPR spectroscopy
• ISSN: 0969-806X; 1879-0895
• DOI: 10.1016/S0969-806X(98)00090-5

In recent years, the radiation processing in China has developed rapidly. National Institute of Metrology (NIM) is duty-bound to supervise and ensure the quality of the processing products for the irradiation facilities countrywide. Because of the excellent behaviour, alanine-ESR dosimetry system(IAEA, 1981; Regulla and Deffener, 1982) as well as the other ones have been selected for the purpose to study at NIM since 1983. In 1988, the NIM set up a program of National Dose Assurance Service (NDAS)(Gao Juncheng et al, 1990; Gao Juncheng, 1996), which bases on the NIM developed alanine-ESR system. From then on, over 600 dose checks have been made for more than sixty cobalt-60 facilities in the frame of the NDAS program in China. This paper describes the implementation of the NDAS program, its measurement results and the problems concerned.