Bowing of core assemblies in advanced liquid metal fast reactors

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Two alternative core restraint concepts are considered for a conceptual design of a 900 MWth liquid metal fast reactor core with a heterogeneous layout. The two concepts, known as limited free bowing and free flowering, are evaluated based on core bowing criteria that emphasize the echancement of inherent reactor safety. The core reactivity change during a postulated loss of flow transient is calculated in terms of the lateral displacements and displacement-reactivity-worths of the individual assemblies. The NUBOW-3D computer code is utilized to determine the assembly deformations and interassembly forces that arise when the assemblies are subjected to temperature gradients and ... continued below

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Pages: 22

Creation Information

Kamal, S.A. & Orechwa, Y. January 1, 1986.

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Description

Two alternative core restraint concepts are considered for a conceptual design of a 900 MWth liquid metal fast reactor core with a heterogeneous layout. The two concepts, known as limited free bowing and free flowering, are evaluated based on core bowing criteria that emphasize the echancement of inherent reactor safety. The core reactivity change during a postulated loss of flow transient is calculated in terms of the lateral displacements and displacement-reactivity-worths of the individual assemblies. The NUBOW-3D computer code is utilized to determine the assembly deformations and interassembly forces that arise when the assemblies are subjected to temperature gradients and irradiation induced creep and swelling during the reactor operation. The assembly ducts are made of the ferritic steel HT-9 and remain in the reactor core for four-years at full power condition. Whereas both restraint systems meet the bowing criteria, a properly designed limited free bowing system appears to be more advantageous than a free flowering system from the point of view of enhancing the reactor inherent safety.

Physical Description

Pages: 22

Notes

NTIS, PC A02/MF A01; 1.

Source

  • ASME/ANS bi-annual nuclear power conference: safe and reliable nuclear power plants, Philadelphia, PA, USA, 20 Jul 1986

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  • Other: DE86007460
  • Report No.: CONF-860724-2
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 5693381
  • Archival Resource Key: ark:/67531/metadc1092942

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 1986

Added to The UNT Digital Library

  • Feb. 10, 2018, 10:06 p.m.

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  • April 18, 2018, 6:23 p.m.

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Kamal, S.A. & Orechwa, Y. Bowing of core assemblies in advanced liquid metal fast reactors, article, January 1, 1986; Illinois. (digital.library.unt.edu/ark:/67531/metadc1092942/: accessed October 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.