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The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
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Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
Zhang Huanqiao, Liu Zuhua, Ding Shengyue, and Liu Shaoming
Nuclear Science and Engineering | Volume 86 | Number 3 | March 1984 | Pages 315-319
Technical Note | doi.org/10.13182/NSE84-A17560
Articles are hosted by Taylor and Francis Online.
This research was published (in Chinese) in Chin. J. Nucl. Phys., 3, 2, 149 (1981). The average number of prompt neutron and the distributions of prompt neutron number probability P(ν) for spontaneous fission of 240Pu, 242Cm, and 244Cm relative to (252Cf) have been measured using a large gadolinium-loaded liquid scintillation counter with a co-incidence method. The results were (240Pu) = 2.141 ± 0.016, (242Cm) = 2.562 ± 0.020, and (244Cm) = 2.721 ±0.021. The measured distributions of prompt neutron number were fitted with Gaussian curves by a weighted least-squares method. The widths of Gaussian distribution are 1.149 ± 0.047, 1.159 ± 0.074, and 1.175 ± 0.098 for 240Pu, 242Cm, and 244Cm, respectively. These results as well as a previous measurement of spontaneous fission of 252Cf show the linear variation of σ with at the first order of approximation. The data were fitted by a least-squares method, and the result is given by σ = 0.980 + 0.076. This fact demonstrates the trend that the width of the excitation energy distribution of fission fragments increases with the average excitation energy of the fission fragments in the range of nuclides mentioned above.
