Pipe damping studies
The Idaho National Engineering Laboratory (INEL) is conducting a research program to assist the United States Nuclear Regulatory Commission (USNRC) in determining best-estimate damping values for use in the dynamic analysis of nuclear power plant piping systems. This paper describes four tasks in the program that were undertaken in FY-86. In the first task, tests were conducted on a 5-in. INEL laboratory piping system and data were analyzed from a 6-in. laboratory system at the ANCO Engineers facility to investigate the parameters influencing damping in the seismic frequency range. Further tests were conducted on 3- and 5-in. INEL laboratory piping systems as the second task to determine damping values representative of vibrations in the 33 to 100 Hz range, typical of hydrodynamic transients. In the third task a statistical evaluation of the available damping data was conduted to determine probability distributions suitable for use in probabilistic risk assessments (PRAs), and the final task evaluated damping data at high strain levels.
- Research Organization:
- EG and G Idaho, Inc., Idaho Falls (USA)
- DOE Contract Number:
- AC07-76ID01570
- OSTI ID:
- 7072261
- Report Number(s):
- EGG-M-20986; CONF-8610135-15; ON: DE87002602
- Resource Relation:
- Conference: 14. water reactor safety information meeting, Gaithersburg, MD, USA, 27 Oct 1986; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Piping system damping data at higher frequencies
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Related Subjects
36 MATERIALS SCIENCE
NUCLEAR POWER PLANTS
PIPES
DAMPING
MECHANICAL VIBRATIONS
FATIGUE
HYDRAULICS
RISK ASSESSMENT
STRAINS
FLUID MECHANICS
MECHANICAL PROPERTIES
MECHANICS
NUCLEAR FACILITIES
POWER PLANTS
THERMAL POWER PLANTS
220200* - Nuclear Reactor Technology- Components & Accessories
360103 - Metals & Alloys- Mechanical Properties