ANALISIS AKTIVITAS SUMBER RADIASI DAN INTENSITAS SINAR GAMMA DI TERAS REAKTOR PWR 1000 MWe
Keywords:
AP1000 nuclear power plant, activity of radionuclides, curie, intensity of gamma rays, photonAbstract
One of the 1000 MWe class nuclear power plant is the AP1000, full operating power reactors by 3400 MWt. Gamma rays in the reactor core derived from three types of sources :1) gamma ray results of radiative capture reactions,2) gamma rays result of spontaneous fission reaction and 3) gamma ray decay of radionuclides and the decay of the fission radionuclides results from material activation in the core. Nuclides composition in the core is a parameter to determine the radiative capture reaction rate, calculated using the Origen-2 program package. The code was also used to calculate the activity of radionuclides in the reactor core and gamma ray intensity decay. with the assumption that the reactor operated at full power for 540 days without trouble, most of the activity of radionuclide fission results tend to be stable, whereas the activity of radionuclide activity and the activity of actinide material tends to increase with time of operation. The highest activity is the radionuclide activity of the fission product which totals 6.8×109 curies at the end of reactor operation, followed by the activity of actinide 1.06×109 curis, then the result of activation of radionuclide activity5.98×106 curis. Gamma ray energy ranges between 0-11 MeV, grouped in 7 classes of energy. Radiative capture gamma ray sources contributing the highest intensity followed by the intensity of gamma rays result of spontaneous fission, then the intensity of the decay gamma rays. In general, low-energy gamma rays classes have a greater intensity than the intensity of high energy gamma rays.
References
AP1000 European Design Control Document, 2009, Westinghouse Electric Company LLC, EPS-GW-GL-700; 2009.
Sterbentz, J.W. Calculated neutron and gamma rays spectra. 13th International Symposium on Reactor Dosimetry, INL/CON-08-13845; 2002.
Martin A., Harbison S.A. An introduction to radiation protection. 5th ed.. ISBN 10- 0340885432; 2006
Lamarsh, J.R. Introduction to nuclear engineering. Addison Wesley Publishing Company, Inc. Reading massachussetts, U.S.A; 1983.
Reactor Physics, CNSC. Science and reactor fundamentals- reactor physics. Technical Training Group, CANDU, Revision 1 - January 2003. canteach.candu.org/library/20030101.pdf
Tuli J.K. Thermal neutron capture gamma-rays. National Nuclear Data Center, Brookhaven National Laboratory, Upton, N.Y. 11973, U.S.A; 1999.
Jaeger, R.G., Blizard, A.P., Chilton, A.B. Engineering compendium on radiation shielding. Springer, ISBN-10: 0387040803; 1968.
https://doi.org/10.1007/978-3-662-25858-3
Lamarsh, J.R. Introduction to nuclear reactor theory. American Nuclear Sosiety,ASIN/ISBN 0894480405; 2002.
Ludwig, S.B., Croft, A.G. ORIGEN-2-2 isotope generation and depletion code-matrix exponential method. OAK RIDGE NATIONAL LABORATORY, Oak Ridge, Tennessee 37830; 2002.
Adamskii, V.B., et al. Multiple neutron capture by U, Am, Tm, and Au isotopes in a flux of thermalized neutrons from a nuclear explosion in the zond experiment. Atomic Energy, Vol 81 No. 3 651-655, DOI: 10.1007/BF02407059; 1996. Avaliable from http://www.springerlink.com/index/B668423K367LR743.pdf
