HFIR Vessel Maximum Permissible Pressures for Operating Period 26 to 50 EFPY (100 MW)

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Description

Extending the life of the HFIR pressure vessel from 26 to 50 EFPY (100 MW) requires an updated calculation of the maximum permissible pressure for a range in vessel operating temperatures (40-120 F). The maximum permissible pressure is calculated using the equal-potential method, which takes advantage of knowledge gained from periodic hydrostatic proof tests and uses the test conditions (pressure, temperature, and frequency) as input. The maximum permissible pressure decreases with increasing time between hydro tests but is increased each time a test is conducted. The minimum values that occur just prior to a test either increase or decrease with ... continued below

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39 p.

Creation Information

Cheverton, R.D. & Inger, J.R. January 1, 1999.

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Description

Extending the life of the HFIR pressure vessel from 26 to 50 EFPY (100 MW) requires an updated calculation of the maximum permissible pressure for a range in vessel operating temperatures (40-120 F). The maximum permissible pressure is calculated using the equal-potential method, which takes advantage of knowledge gained from periodic hydrostatic proof tests and uses the test conditions (pressure, temperature, and frequency) as input. The maximum permissible pressure decreases with increasing time between hydro tests but is increased each time a test is conducted. The minimum values that occur just prior to a test either increase or decrease with time, depending on the vessel temperature. The minimum value of these minimums is presently specified as the maximum permissible pressure. For three vessel temperatures of particular interest (80, 88, and 110 F) and a nominal time of 3.0 EFPY(100 MVV)between hydro tests, these pressures are 677, 753, and 850 psi. For the lowest temperature of interest (40 F), the maximum permissible pressure is 295 psi.

Physical Description

39 p.

Notes

INIS; OSTI as DE00003660

Medium: P; Size: 39 pages

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  • Other Information: PBD: 1 Jan 1999

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  • Report No.: ORNL/TM-13355
  • Grant Number: AC05-96OR22464
  • DOI: 10.2172/3660 | External Link
  • Office of Scientific & Technical Information Report Number: 3660
  • Archival Resource Key: ark:/67531/metadc682275

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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, 1999

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  • July 25, 2015, 2:20 a.m.

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  • April 12, 2017, 2:43 p.m.

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Cheverton, R.D. & Inger, J.R. HFIR Vessel Maximum Permissible Pressures for Operating Period 26 to 50 EFPY (100 MW), report, January 1, 1999; Tennessee. (digital.library.unt.edu/ark:/67531/metadc682275/: accessed November 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.