ML20094B496
| ML20094B496 | |
| Person / Time | |
|---|---|
| Issue date: | 11/24/1975 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| References | |
| NUREG-75-087, NUREG-75-087-02.4.6, NUREG-75-87, NUREG-75-87-2.4.6, SRP-02.04.06, SRP-2.04.06, NUDOCS 9511010092 | |
| Download: ML20094B496 (6) | |
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NUREG 75/087 s uo y"
U.S. NUCLEAR REGULATORY COMMISSION i
STANDARD REVIEW PLAN OFFICE OF NUCLEAR REACTOR REGULATION l
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SECTION 2.4.6 PROBABLE MAXIMUM TSUNAMI FLOODING t
l REVIEW RESPONSIBILITIES Primary - Site Analysis Branch (SAD)
Secondary - None I.
AREAS OF REVIEW The geohydrological design basis of the plant is developed in this section of the safety analysis report (SAR) to determine the extent of plant protection required for tsunami flooding, if any. The areas of review consist of (1) identifying the most severe distant and local sources of tsunami generation, and (2) identifying the maximum magnitudes, focal depths vertical displacement components. and periodicities of seismic activity for these most severe distant and local potential generators. Based on the results of (1) and (2),
sea disturbances at those locations of maximum tsunami wave train propagation potential with respect to the plant site are modeled by postulating various initiating sea wave train forms at the generator locations, and analytically propagating the initiating wave train to the j
site for determination of the worst case. Coincident astronomical tide, storm surge or sea level anomaly, and storm waves (all of approximately annual severity) are postulated coinci-dent with the tsunami. Tsunami wave runup and runout (drawdown). including superposition of the effects of coincident water level and wave action, are evaluated for each safety-related structure that may be affected. Design criteria for structures provided to protect safety-related facilities, such as seawalls and breakwaters, are reviewed for seismic design basis and, separately, for tsunami wave train design basis. Predictive deterministic models used in making probable maximum tsunami wave train propagation estimates are compared with historical events for model verification. Nearshore wave propagation is analyzed for wave form changes due to local hydrography and harbor or breakwater influences, including resonance (wave amplification) effects.
II. ACCEPTANCE CRITERIA The general criteria to be used in estimating tsunami static and dynamic effects are contained in Regulatory Guide 1.59, which is based, in part, upon General Design Criteria 2, Appendix A to 10 CFR Part 50, The analysis will be considered complete and acceptable if (a) reasonably severe seismic generating mechanisms of safe shutdown earthquake (SSE) severity have been postulated for the known most severe local and distant generator locations. (b) wave train USNRC STANDARD REVIEW PLAN 0*"*.,7,'.*.*.,",4""".i"?l,,".'""*.*' '." *%"O' ".*E"."".*,00 *.T.'." ".".U '*.'u**,'.**i,, U""*".ll:' '.' *Z'*". ",,.
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propagation accounts for bathymetric influences, (c) coincident ambient tide and wave condi-tions of about annual sevIrity have been assumed, and (d) resonance effects are considered.
In general, the staff will make an independent estimate of the effects of at least one controlling tsunami wave train case. If the applicant' water level estimates, referenced to mean or normal levels, are within about 5-10 percent of those made by the staff, or are greater, the applicant's proposed dmign basis will be considered confirmed, v
III. REVIEW PROCEDURES The review procedures, as described on the attached Figure 2.4.6. consist of evaluating the potential for maximum tsunami generation from both distant and local sources, and may employ the use of analytical models of the generating mechanisms, a range of generating wave forms, and wave propagation analyses to the edge of the continental shelf and to safety-related near-shore facilities. The references used are general geophysical, seismological, and hydrodynamic publications, such as published data by the National Oceanic and Atmospheric i
Administration (NOAA), and wave propagation models such as those developed by NOAA and Tetra Tech. Tsunami analyses, with respect to both generator identification and evaluation and wave generation models, are currently in a state of flux. The reviewer and applicant must stay abreast of the availability of the rapidly developing analytic techniques which apply to each site and region.
Because tsunami estimates are site-specific, each application requires identification of the physical parameters and data associated with the specific site in question on an
)
individual basis.
l Consultants may be employed in either an advisory role in developing independent staff tsunami effect estimates, or in making independent estimates of specific effects, de-pending on the complexity of the analysis required and available staff manpower. The consultants may be from the NOAA Tsunami Research Center, the Corps of Engineers Coastal Engineering kesearch Center (CERC), or private contractors.
The above reviews are performed only when applicable to the site or site region. Some items of review may be done on a generic basis.
IV. EVALUATION FINDINGS For construction permit (CP) reviews the findings will consist of a statement sumarizing applicant and staff estimates of the maximum and minimum tsunami water levels, static and dynamic effects of wave action, and a statement of acceptability of the tsunami-induced design basis. For operating license (OL) reviews, the findings will consist of the evaluation of any new information on tsunami potential, improvements in predictive models acceptability of specific design bases, and the acceptability of design provisions.
A sample statement for an CP review follows:
" Floods caused by wind-driven surges up the tidal portion of the estuary between the Pacific and the site, and seismically-induced sea waves (tsunamis) being propagated up the A River estuary were also evaluated by the applicant. Both 2.4.6-2 11/24/75
phInomena are believed to have historically caused water le,el variations in the site vicinity. The applicants' analysis, however, indicates the physical characteristics of the A River estuary between the site and the Pacific tend to limit water level effects at the site to only relatively small water level excursions."
V.. REFERENCES r
1.
Li-San Hwang, H. Lee Butler, and David J. Divorky, Tetra Tech Inc, " Tsunami Model:
Generation and Open-sea Characteristics," Bulletin of the Seismological Society of America, Vol. 62. No. 6. December 1972.
2.
Li-San Hwang D. Divorky, and A. Yuen. Tetra Tech Inc., "Amchitka Tsunami Study." Report NV0-289-7, Nevada Operations Office, U. S. Atomic Energy Comission (1971).
3.
Li-San Hwang and D. Divorky, Tetra Tech Inc., " Rat Island Tsunami Model: Generation and Open Sea Characteristics," Report NV0-289-10, Nevada Operations Office, U. S.
AtomicEnergyCommission(1971).
4.
H. G. Loomis, "A Package Program for Time-Stepping Long Waves into Coastal Regions with Application to Haleiwa Harbor, Oahu," Hawaii Institute of Geophysics and National Oceanic and Atmospheric Administration (1972).
5.
Li-San Hwang and D. Divorky, " Tsunami Generation " Jour. of Geophysical Research,
.Vol. 75, No. 33 (1970),
6.
K. L. Heitner, " Additional Investigations on a Mathematical Model for Calculation of the Run-up of Tsunamis," California Institute of Technology (1970).
7.
R. L. Street, Robert K-C Chan, and J. E. Fronn, "Two Methods for the Computation of the Motion of Long Water Waves - A Review and Applications," NR 062-320 Technical Report 136, Office of Naval Research, distributed as a reprint from the Proc. 8th Symposium on Naval Hydrodynamics, August 1970.
8.
B. W. Wilson, " Earthquake Occurrence and Effects in Ocean Areas (U)," Technical Report 69.027 U. S. Naval Civil Engineering Laboratory Port Hueneme California, February 1969.
9.
C. L.,Mader, " Numerical Simulation of Tsunamis," Hawaii Institute of Geophysics and National Oceanic and Atmospheric Administration, February 1973.
10.
R. W. Preisendorfer, "Recent Tsunami Theory," Hawaii Institute of Geophysics and NOAA, August 1971.
- 11. National Oceanic and Atmospheric Administration. Nautical Charts.
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2.4.6-3 11/24/75 L
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- 12. " Shore Protection. Planning and Design." Tgchnical Report 4. Third Edition Ccrps of Engineers Coastal Engineering Research Center. Third Edition (1966); and " Shore Protection Manual" (1973).
13.
B. W. Wilson and A. Trum, "The Tsunami of the Alaskan Earthquake.1964: Engineering Evaluation," Tech. Memo No. 25, Corps of Engineers Coastal Engineering Research Center.
(1968).
- 14. Regulatory Guide 1.70, " Standard Format and Content of Safety Analysis Reports for Nuclear Power Plant.s." Revision 2.
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FIGUR E 2.4.6 STANDARD REVIEW DLAN 2.4.6-TSUNAMIS EVALUATE APPLICATION FOR WRITE Q 1 MISSING DATA & ANALYSES i,
v DETERMINE WHETHER DETAILED i NO f a i
ANALYSES REQUIRED i
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<r DETERMINE THE LOCATION OF PRIMARY DETERMINE THE LOCATION OF PRIMARY POTENTIAL FAR FIELD GENERATORS POTENTIAL FARFIELD GENERATORS (GEO. & SEIS. INPUT).
(GEO. & SEIS. INPUT).
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ESTIMATE MAXIMUM EARTHQUAKE, SLIDE.
ESTIMATE MAXIMUM EARTHQUAKE, SLIDE,
- OR VOLCANIC MAGNITUDE, DEPTH, &
OR VOLCANIC MAGNITUDE, DEPTH &
VERTICAL DISPLACEMENTS (GEO. & SEIS.
VERTICAL DISPLACEMENTS (GEO. &
INPUT).
SEIS. INPUT).
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INPUT ESTIMATED INITIATED WAVE INPUT ESTIMATED INITI ATED WAVE FORMS INTO NOAA NEAR FIELD CODE.
FORMS INTO NOAA FAR FIELD CODE.
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4 EVALUATE COINCIDENT WATER LEVEL WAVE CONDITIONS & RUNUP USING CERC TR #4, OR SHORE PROTECTION MANUAL lE%
l LUATE ANSWERS.
COMPARE WITH APPLICANT'S ESTIMATE (FORCES, HEIGHTS,ETC).
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l l ACCEPTABLE l 1
h l WRITE POSITIONS. l 1
l EVALUATE RESPONSES. l 1
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l ACCEPTABLE l l UNACCEPTABLE l ir ATTEMPT TO RESOLVE WITH APPLICANT THROUGH LPM.
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