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Applications of Bulk Measurement Techniques for the Near-Real-Time Accounting System at the BNFP

机译:批量测量技术在BNFp近实时计费系统中的应用

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Nuclear materials accountancy at the Barnwell Nuclear Fuel Plant (BNFP) is based primarily on bulk measurement of aqueous solutions containing uranium, plutonium, and fission products. Since 1973, Allied-General Nuclear Services (AGNS) has been adapting volume measurement and measurement control techniques at the various key measurement points within the plant. Starting in 1977, AGNS has been incorporating these measurement activities into a computerized nuclear materials control and accounting system (CNMCAS). This paper presents the major features of the measurement systems and describes the results of plant-scale testing of the system using unirradiated natural uranium. The results of these tests indicate that total uncertainties of about 0.2% of throughput (2 sigma level) can be achieved for conventional accounting and about 2.0% of hold-up can be achieved for in-process inventory estimates. These results are based on measurement of almost 500 MTU of throughput over 130 operating days.

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