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Research Papers: Seismic Engineering

Evaluation Method for Seismic Fatigue Damage of Plant Pipeline

[+] Author and Article Information
Fumio Inada, Ryo Morita

Nuclear Risk Research Center,
Central Research Institute of
Electric Power Industry,
2-6-1, Nagasaka,
Yokosuka-shi 240-0196, Kanagawa, Japan

Michiya Sakai, Shin-ichi Matsuura

Nuclear Risk Research Center,
Central Research Institute of
Electric Power Industry,
1646, Abiko,
Abiko-shi 270-1194, Chiba, Japan

Ichiro Tamura

The Chugoku Electric Power Co.,
4-33, Komachi, Naka-ku, Hirosima-shi,
Hiroshima 730-8701, Japan

Kiyoshi Saito

Nuclear Risk Research Center,
Central Research Institute of
Electric Power Industry,
1646, Abiko,
Abiko-shi 270-1194, Chiba, Japan.

Yasuki Ohtori

Nuclear Risk Research Center,
Central Research Institute of
Electric Power Industry,
1-6-1, Otemachi, Chiyoda-ku,
Tokyo 100-8126, Japan

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received April 24, 2018; final manuscript received December 6, 2018; published online February 21, 2019. Assoc. Editor: Oreste S. Bursi.

J. Pressure Vessel Technol 141(2), 021801 (Feb 21, 2019) (9 pages) Paper No: PVT-18-1085; doi: 10.1115/1.4042220 History: Received April 24, 2018; Revised December 06, 2018

Although acceleration and cumulative absolute velocity (CAV) are used as seismic indexes, their relationship with the damage mechanism is not yet understood. In this paper, a simplified evaluation method for seismic fatigue damage, which can be used as a seismic index for screening, is derived from the stress amplitude obtained from CAV for one cycle in accordance with the velocity criterion in ASME Operation and Maintenance of Nuclear Power Plants 2012, and the linear cumulative damage due to fatigue can be obtained from the linear cumulative damage rule. To verify the performance of the method, the vibration response of a cantilever pipe is calculated for four earthquake waves, and the cumulative fatigue damage is evaluated using the rain flow method. The result is in good agreement with the value obtained by the method based on the relative response. When the response spectrum obtained by the evaluation method is considered, the value obtained by the evaluation method has a peak at the peak frequency of the ground motion, and the value decreases with increasing natural frequency above the peak frequency. A higher peak frequency of the base leads to a higher value obtained by the evaluation method.

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References

Reed, J. W. , Anderson, N. , Chokshi, N. C. , Kennedy, R. P. , Metevia, W. J. , Osttrom, D. K. , and Stevenson, J. D. , 1988, “ A Criterion for Determining Exceedance of the Operating Basis Earthquake,” Electric Power Research Institute, Palo Alto, CA, Report No. EPRI NP-5930. https://inis.iaea.org/search/search.aspx?orig_q=RN:19106240
O'Hara, T. F. , and Jacobson, J. P. , 1991, “ Standardization of the Cumulative Absolute Velocity,” Electric Power Research Institute, Palo Alto, CA, Report No. EPRI TR-100082. https://inis.iaea.org/search/search.aspx?orig_q=RN:23031748
Kassawara, R. , and Sandell, L. , 2006, “ Program on Technology Innovation: Use of CAV in Determining Effects of Small Magnitude Earthquakes on Seismic Hazard Analyses,” Electric Power Research Institute, Palo Alto, CA, Report No. EPRI 1014099. https://www.nrc.gov/docs/ML0603/ML060320738.pdf
USNRC, 1997, “ Pre-Earthquake Planning and Immediate Nuclear Power Plant Operator Postearthquake Actions,” USNRC Regulatory Guide 1.166, U.S. Nuclear Regulatory Commission, Washington DC.
ASME, 2012, “ Operation and Maintenance of Nuclear Power Plants, Division 2: OM Standards Contents—Part 3: Vibration Testing of Piping Systems, Nonmandatory Appendix D ‘Velocity Criterion’,” ASME, New York, Standard No. ASME OM-2012.
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Caillaud, S. , Pons, Y. , Moussou, P. , and Gaudin, M. , 2005, “ A 12 mm RMS Screening Vibration Velocity for Pipes Using ANSI-OM3 Standard and Regulatory Design Rules,” ASME Paper No. PVP2005-71014.
ASME, 2010, “ ASME Boiler & Pressure Vessel Code Section III, Division 1: Mandatory Appendix I,” ASME, New York.
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Endo, T. , Matsuishi, M. , Mitunaga, K. , Kobayashi, K. , and Takahashi, K. , 1974, Rain Flow Method, the Proposal and the Applications, Vol. 28, Bulletin of the Kyushu Institute of Technology, Engineering, Fukuoka, Japan, pp. 33–62 (in Japanese).

Figures

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Fig. 1

Vibration acceleration and its absolute value: (a) acceleration and (b) absolute value of acceleration

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Fig. 2

Wave shape of earthquakes when the amplitude is relatively large: (a) a part of wave shape at Oofunato-cho of the 2011 off the Pacific coast of Tohoku Earthquake and (b) a part of wave shape at Yoneda, Izumozaki-cho of the 2007 Niigataken Chuetsu-oki Earthquake

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Fig. 3

An example of the calculation results of η for Z-bend: (a) Z-bend pipe and (b) value of η versus Lp

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Fig. 4

A cantilever pipe with a lumped mass and the FEM model

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Fig. 5

Epicenters and observation points used for evaluation

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Fig. 6

Wave shapes of earthquakes used for evaluation: (a) wave shape at Oofunato-cho of the 2011 off the Pacific coast of Tohoku Earthquake, (b) wave shape at Omaezaki of the 2009 Surugawan Earthquake, (c) wave shape at Yoneda, Izumozaki-cho of the 2007 Niigataken Chuetsu-oki Earthquake, and (d) wave shape at Izumi-cho, Ishinomaki-shi of the 2005 Miyagiken-oki Earthquake

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Fig. 7

Calculation result showing the relationship of Dcanti in Eq. (25) to the cumulative fatigue damage obtained by the rain flow method.

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Fig. 8

Relationship of acceleration to Drain

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Fig. 9

Relationship of CAV to Drain

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Fig. 10

Result for D in Eq. (23), that is, a candidate of the conservative evaluation method

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Fig. 11

Seismic fatigue damage for four earthquakes as a function of natural frequency: (a) ζ = 0.005 and (b) ζ = 0.05

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Fig. 12

An example of acceleration response spectrum (ζ=0.005)

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Fig. 13

Alternation of CAV and the new method when the acceleration is fixed

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