ML17276B447

Forwards Revised Response to NRC Question 361.016 Re Ground Motion.Response Informally Transmitted on 820510 & Will Be Incorporated Into FSAR Amend 27

ML17276B447
Person / Time
Site:	Columbia
Issue date:	05/19/1982
From:	Bouchey G WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	Schwencer A Office of Nuclear Reactor Regulation
References
GO2-82-454, NUDOCS 8205260069
Download: ML17276B447 (58)

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REGULATO INFORMATION DISTRIBUTI TEM (RIDS)

'AOGESSION NBR:8205260069, DOCBDATE: 82/05/19 NOTARI'2EI7: Ng ,

DOCKET '~

FACIL:50 397 NPPSS Nuclear Pro,lect'nit 2< Nashin'gton )Public Powe 05000397

'AUTH ~ NAME AUTKOR AFFILIATION BOUCHEY<G,D, Washington Public Power 'Supply 'System

'REIC IP ~ NAME REC IP IENT AFFILIATION SCHKENCEREA, Licensing Branch 2

SUBJECT:

Forwards revisedresponse .to NRC Question'361 016 ~re ground motion. Response informally transmitted on 820S10 & will be incorporated into FSAR Amend ?7.

E DISTRIBUTION CODE: 0001S iCOPIES 'RECEIVED:LTR ENCI. LSIZE:,

TITLE: PSAR/FSAR AMDTS and Related Correspondence NOTES:

RECIPIENT COPIES RECIPIENT ICOP IES

-ID CODE/NAME- LTTR ENCL ID 'CODE/NAME LTITR ENCL A/D LICENSNG 0 LIC BR 0P 'BC 1 0 LIC BR 02 LA 1 0 AULUCKgR ~ 01 1 INTIE RNAL ~ ELD/HDS2 1 0 IE, FILF 1 IE/DEP EPDS T35 1 1 IE/DEP/EPLB "36 '3 3 NRR/DE/CEB 11 MPA NRR/DE/EQB 13 0

NRR/DE/GB 28 "2, 1 1 2

NRR/DE/HGEB <<30 2 2 NRR/DE/MEB 18 1 1 NRR/DE/MTEB 17 1 NRR/DEQQAB 21 1 1 NRR/DE/SAB '24 1 1 NRR/DE/SEB 25 1 1

,.NRR/DHFS/HFEB40 1 1 NRR/DHFS/LQB 32 1 1 NRR/DHFS/OLB'34 1 1 NRR/OHMS/PTRB20 1 1 NRR/DS I/AEB 26 1 NRR/DS I/ASB 27 1 1 NRR/DSI/CPB 10 1 1 NRR/DS I/CSB 09 1 NRR/DSI/ETSB, 12 1 1 NRR/DSI/ICSB 16 1 NRR/OS I/PSB 19 1 NRR/DS I/RAB 22 1 NRR DS /RSB '23 1 1 NRR/DST/LGB 33 1 EG FIL 04 1 1 RGNS 2 2 EXTIERVAL: ACRS 41 16 16 BNL(AMDTS ONLY-) 1 FEMA REP DIV 039 1 L'P DR 03 1 NRC PDR 0? 1 1 NSIC 05 1 1 NTIS 1 1 lTOTAL NUMBER OF COPIES RFQUIRED: UTTR 63 ENCL,'58

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Washington Public Power Supply System P.O. Box 968 3000 George Washington Way Richland, Washington 99352 (509) 372-5000 May 19, 1982 G02-82-454 SS-L-02-CDT-82-060 Docket No. 50-397 Mr. A. Schwencer, Chief Licensing Branch No. 2 Division of Licensing U.S. Nucl'ear Regulatory Commission Washington, D.C. 20555

Subject:

NUCLEAR PROJECT NO. 2 REVISED RESPONSE TO NRC QUESTION 361.016 Enclosed are sixty (60) copies of the revised response to NRC Question 361.016. This response was informally transmitted to the NRC on May 10, 1982, and will be incorporated into FSAR Amendment 27.

Very truly yours,

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G. D. Bouchey Deputy Director, Safety and Security CDT/jca Enclosures cc: R Auluck - NRC WS Chin - BPA R . Feil - NRC Site 8205260nr 7

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Question 361.16 Estimate the ground motion (including high frequencies) assuming

,a magnitude ML = 4.0 (largest swarm event in the Columbia Plateau) occurred at a distance of 3 to 5 kilometers from the site. Compare the response spectra from this event to the SSE response spectra. Also, state your position on how large and close a potential swarm earthquake could come to the site.

RESPONSE

Maximum Swarm Event Based on the analysis of the Columbia Plateau seismicity pre-sented in Appendix 2.5J to the WNP-2 FSAR, the maximum magnitude assoc'iated with shallow seismicity that can be expected to occur within the Columbia River Basalts in close proximity to the site

(< 5 km) is approximately MC 3.0. As requested, estimates of the ground motions resulting from a magnitude M> = 4.0 earthquake occurring at a distance of 3 to 5 km from the site are provided below.

A roach The ground motions at the NNP-2 site resulting from small magni-tude near field earthquakes are estimated using an empirical approach. The approach used is as follows:

~ A data set was developed of accelerograms recorded during magnitude ML 4.0 + 0.2 earthquakes. The criteria used for selection were similar site conditions to the NNP-2 site (deep, stiff soils) and good quality data for earthquake magnitude and location.

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~ Using the selected data set, an attenuation relationship was developed for peak ground acceleration. This rela-tionship was used to estimate the peak horizontal acceler-ations resulting from a magnitude 4 earthquake occurring at a distance of 3 to 5 km from the site.

4 The spectral content of the ground motions was estimated by developing a median spectral shape for ground motions recorded at hypocentral distances less than approximately 10 km. This spectral shape was anchored to the estimated peak acceleration to provide an estimate of the spectral accelerations.

Selection of Data Set Xn the last 7 years, a large number of small magnitude near field strong ground motion recordings have been obtained, primarily from recordings during 4 aftershock sequences: Oroville, 1975; Friuli, Italy, 1976; Imperial Valley, 1979; and Mammoth Lakes, 1980. Table 361.16-1 lists the available data sets of recordings for earthquakes of magnitude ML 4.0 + 0.2. The recordings listed in Table 361.16-1 exist as either digitized but uncorrected accelerograms (including digital recordings) or undigitized film recordings.

All available digitized recordings were obtained for analysis.

The accelerograms recorded at hypocentral distances less than approximately 10 km were corrected using standard processing techniques (Trifunac, 1970; Trifunac and Lee, 1973) to remove digitization and long period errors and to correct for instrument

.response. A time step of 0.005 seconds was used in correcting all of the records to capture the high-frequency motion content of the records. The high pass corner frequency was set at a nominal value of 0.4 Hz. The low pass corner frequency was set at 25 hz for the film recorded accelerograms and 35 Hz for the digitally recorded accelerograms.

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1975 Oroville Earth uake. The Oroville earthquake occurred on August 1, 1975, in the western foothills of the Sierra Nevada, California. The main shock was magnitude ML 5.7 and the focal mechanism was one of primarily normal faulting. Twenty-two recordings were obtained on soil sites for magnitude ML 4.0 + 0.2 aftershocks in the distance range of 8 to .,15 km. The magnitudes and locations of the aftershocks are generally well constrained.

The site conditions at the recordingstations located on soil range from shallow (10 m) stiff soil to deep granular alluvial deposits. All of the soil site records are considered applicable to the conditions at the NNP-2 site and were used in the analysis with the exception of those from station DJR. The soil condi-tions at the DJR station consist of very shallow (10 m) alluvium layer overlying rock (Toppozada et. al., 1975), which is substan-tially different from the deep soil deposit at WNP-2.

1976 Friuli Ital Se uence. The Friuli earthquake sequence occurred during May - September, 1976 in northeastern Italy. The main shock was magnitude ML 6.2 and three large aftershocks of ML

> 5.9 were recorded. The focal mechanism for the large events was strike slip. Site conditions at the recording stations located on soil generally consist of stiff soils of varying depths. Fifteen recordings were obtained on soil sites for magnitude ML 4.0 + 0.2 earthquakes. The location accuracy of the earthquakes is not well defined but may be of the order of ~ 5 km. Because of the possible large errors in the location of the events, the recordings from Friuli were not used in the analysis.

1979 Im erial Valle Earth uake. The Imperial Valley earthquake (ML 6.6, MS 6.9) occurred on October 15, 1979. The primary focal mechanism for the main shock was strike slip. The recordings obtained for magnitude ML 4 events are currently being digitized and processed by the USGS and are not yet available in digitized form. Only peak amplitudes scaled from the film traces are available.

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The site conditions at the recording stations consist of veiy deep deposits of fine grained soils. The soil conditions in the Imperial Valley appear to be substanially softer than the soil profile at the NNP-2 site. Therefore, the recordings from the Imperial Valley were not used in this study.

1980 Mammoth Lakes Se uence. The Mammoth Lakes Sequence occurred during. May - June, 1980, near Mammoth Lakes in the Sierra Nevada, California. The main shock was ML 6.2'and four large aftershocks of ML > 5.7 were recorded. The focal mechanism for the large events was strike slip with a large normal component. Fifty-six recordings were obtained from magnitude ML 4.0 + 0.2 earthquakes.

The magnitudes and locations of the aftershocks are generally well constrained. The magnitudes used in the analysis consist of an average of the ML values reported by Berkeley and Cal Tech.

The differences between the two reported ML values for each event are generally less than 1/4 magnitude unit.

The recording stations are underlain by generally coarse alluvial soils and/or glacial till. The. depth to rock is not known at any one station but may range from a few meters at station CON to several hundred meters at station FIS. Stations FIS and HCF are located on deep deposits of dense alluvium. Station MGE is located in a narrow valley filled with glacial till and station CON is located at the edge of a narrow valley within 10 m .

horizontally of outcropping bedrock. Figure 361.16-1 compares the median spectral shapes for magnitude ML 3.5 to 4.5 recordings at four of the Mammoth Lakes recording stations. The median spectral shape is generally similar for all recording stations except CON. The ground motion recordings obtained at CON gener-ally have a.much higher frequency content and also have, on an average, a much higher peak acceleration. The higher peak acceleration and frequency content may be due to site response as the soil deposit is probably only a few meters thick. However/

because no direct subsurface information is available, the

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recordings obtained at the CON station were conservatively included in the analysis.

In summary, on the basis of similar site conditions to that at the MNP-2 site and the quality of the magnitude and distance determinations, the soil site recordings from Mammoth Lakes and Oroville are considered the most applicable for evaluating ground motions at the WNP-2 site from small magnitude near field events. The records from the Oroville recording station DJR were excluded from the data set due to the shallow soil deposit (10 m). It is possible that records from the Mammoth recording station CON should also be excluded for the same reason.

However, as the site conditions at CON have not been documented, the records were included in the analysis. The effects of excluding data from station CON were examined in a sensitivity analysis. The selected data set including CON consists of 76 recordings in the distance range of 4 to 26 km.. Figure 361.16-2 shows the variation of uncorrected peak acceleration with distance for the selected data set.

The entire data set was used to develop an attenuation relation-ship for magnitude ML 4.0 earthquake giound motions. The near field spectral content of ML 4.0 ground motions was evaluating using a subset of the selected data consisting of 37 recordings obtained at distances less than approximately 10 km.

Attenuation of Peak Horizontal Acceleration The attenuation relationship for peak horizontal acceleration, a, for magnitude 4 earthquakes -is assumed to be of the form:

ln a = A + B ln (R + C)

where R is hypocentral distance and A, B, and C are constants.

Nonlinear regression techniques were used to fit equation (1) to the selected data set. The resulting attenuation equation is:

ln a(g) = 40.58 - 10.03 R (km) + 67.4 (2) with a standard deviation of ln a of 0.70. The above regression equation is superimposed on the data in Figure 361.16-3. At distances of 3 and 5 km, the median and 84th percentile peak accelerations obtained using equation (2) are:

Hypocentral Distance Peak Acceleration 's km Median 84th ercentile 0.12 0.25 0.09 0.19 Because the data are available only in a relatively narrow distance band and there is a large dispersion in the measured accelerations, large variations in the parameters of the attenuation equation produce little change in the error of estimation. Since the available data do not adequately constrain the attenuation relationship, some constraints must be imposed based on previous experience in evaluating attenuation of ground motions. A logical choice is to constrain the far field rate of attenuation (parameter B) based on studies using data from a wider range of distances than available in the small magnitude data'set selected for this study.

Appendix 2.5K to the WNP-2 FSAR presents a general attenuation relationship developed for seismic exposure analysis of the plant site from data in the magnitude range 4 to 7 and distances up to 100 km. The results of that study indicate that the far field slope of the attenuation relationship (parameter B) should be

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-1.89. The regression analysis was repeated with parameter B fixed at -1.89. The resulting attenuation equation is:

ln a = 2.02 - 1.89 ln (R + 4.9) (3) with a standard deviation of 0.71. Figure 316.16-4 compares the median and 16 percentile attenuation equations with the recor-ded data. The predicted peak accelerations at 3 and 5 km are:

Hypocentral Distance Peak Acceleration 's km Median 84 ercentile

0. 15 0.31

0. 10 0. 20 These values represent uncorrected peak accelerations. Corrected peak accelerations are 6 percent lower on an average. The corrected accelerations corresponding to the above tabulated values were used to anchor the response spectrum shape described later in this response.

As discussed above, the site conditions at station CON probably consist of only a few meters of alluvium overlying rock, substantially different from those at WNP-2. The impact of the data from station CON on the predicted peak accelerations was examined by repeating the regression analysis with the 22 data points from station CON removed from the data set. The predicted peak accelerations at 3 and 5 km are reduced by approximately 20 percent for the reduced data set.

The sensitivity of the predicted peak accelerations to the imposed constraints was examined by utilizing constraints suggested by the results of three recent studies. Campbel'1 (1981) suggests that the far field rate of attenuation for

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magnitude 5 to 7.5 earthquakes should be constrained to -1.75.

Idriss (1982) varies the rate of attenuation with magnitude, but imposes a constant value of parameter C = 20 for all magnitudes. Joyner and Boore (1981) impose a magnitude independent form which results in an increasing rate of attenuation with increasing distance. Using each of the above constraints, an attenuation equation was obtained for the ML 4.0 data set. The predicted 84t percentile accelerations at distances of 3 and 5 km are tabulated below.

84th Percentile Relationshi Peak Acceleration 's 3 km 5 km Campbell (1981) 0.31 0.20 B = -1.75 Idriss (1982) 0.28 0.20 C = 20.0 Joyner and Boore (1981) 0.15 0.12 The predicted peak accelerations are, comparable or lower than the results obtained in this study.

S ectral Content The spectral content of the ground motions was estimated by developing a median spectral shape for the near field recordings.

The effect of distance on spectral shape was examined by com-puting a median spectral shape- for two distance bands, 5 to 7.5 km and 7.6 to 10.5 km. Only records from the Mammoth Lakes sequence were- included in this comparison as there were no Oroville aftershocks recorded at distances less than,8 km for magnitude 4.0 + 0.2 events. Figure 361.16-5 compares the two spectral shapes. As can be seen, they are essentially identical.

Consequently, all records in the distance range 0 to 10.5 km were combined to derive a median spectral shape.

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Figure 361.16-6 shows the median spectral shapes for the combined Oroville Mammoth Lakes data set for damping ratios of 2 percent, 5 percent and 7 percent.

The estimated absolute spectral accelerations were obtained by multiplying the median spectral shapes shown in Figure 361.16-6 ll by- the estimated corrected peak accelerations at distances of 3 and 5 km. The attenuation relationship given previously was developed for uncorrected peak acceleration. The average ratio of corrected to uncorrected peak acceleration for records in the distance range of 0 to 10.5 km is 0.94. The corresponding corrected peak accelerations at distances of 3 and 5 km are:

Distance Corrected. Peak Acceleration 's km Median 84 ercentile

0. 14 0.29 0.09 0.19 Multiplying the above corrected accelerations by the median spectral shape, median and 84th percentile response spectra are obtained. Figures 361.16-7 through 361.16-9 compare the resulting response spectra at distances of 3 to 5 km with the 0.25 g SSE spectrum for 2 percent, 5 percent, and 7 percent spectral damping, respectively. As can be seen, the 0.25 g SSE spectrum is only exceeded for frequencies greater than 10 Hz. It is noted that multiplication of the median peak accelerations by the 84th percentile spectral shape results in lower absolute spectral accelerations than those shown on Figures 361.16-7 through 361.16-9 for periods less than 0.3 seconds. This is because the dispersion in peak acceleration is greater than the dispersion in spectral shape.

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Ener Content The severity of the ground motions from small magn'itude earth-quakes can be evaluated by comparing their frequency, energy content, and significant duration with the frequency, eneigy content and significant duration of motions recorded during a moderate-magnitude earthquake. Data from the 1971 ML 6.4 San Fernando earthquake have been used for this comparison.

Figure 361.16-10 shows a plot of peak acceleration vs. total energy content (measured by the square of the acceleration integrated over the duration of shaking) for the ML 4.0 + 0.2 soil recordings at 4 to 10.5 km and soil site recordings from the M~ 6.4 San'Fernando earthquake at distances of 7 to 40 km. For comparable levels of peak acceleration, the energy content of the ML 4.0 recordings is an order of magnitude lower than the San Fernando recordings. This is due in large part to the short duration of shaking for the small magnitude earthquakes. The significant duration (defined as the time required to transmit 5 to 95 percent of the energy content of the accelerogram) ranges from 1 to 5 seconds for the ML 4.0 recordings as compared to from 12 to 25 seconds for the San Fernando recordings.

The frequencies at which the recordings contain energy can be examined by passing the accelerograms through a low-pass filter having a corner frequency of 9 Hz. Computation of the energy of the filtered records indicates that nearly half of the energy content of the ML 4.0 recordings is at frequencies greater than 9 Hz,.while only 5 percent of the energy of the ML 6.4 San Fernando recordings is at frequencies greater than 9 Hz.

The low energy content, short duration, and high frequency nature of ground motions from these small magnitude earthquakes indicate that they have a much lesser engineering significance than ground motions from moderate to large magnitude earthquakes.

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Structural Res onse The scope of this study involved the estimation of ground motions associated with a magnitude ML = 4.0 earthquake occurring at distances of from 3 to 5 km from the WNP-2 site. The ground motion estimates are provided in terms of peak acceleration, spectral acceleration and energy content. Zn addition, analyses were performed to compare the response of the reactor building to the estimated ML 4.0 ground motions with the response of the reactor building to the SSE design ground motion.

Two types of structural response analyses were performed: a response spectrum analysis and a time history analysis of the reactor building in the horizontal direction. For the response spectrum analysis, the input consists of the 84th percentile response spectra at a distance of 3 km (the upper solid curve in<

Figures 361.16-7 through 361.16-9). The input for the time history analysis consists of 3 accelerograms typical of small magnitude ground motions. The selected accelerograms are shown in Figures 361.16-11 through 361.16-13. Appropriate scaling factors were selected for each accelerogram such that the envelope of the response spectra corresponding to the three

~ accel'erograms completely envelopes the 84th percentile response spectra for a magnitude 4.0 earthquake at a distance of 3 km.

The selected accelerograms were scaled to the following peak accelerations.

Scaled Peak Accelero ram ,

Acceleration AOSSOOE 0.29g N07N90E 0.31g P05SSSE 0.23g 11

The scaled response spectra for the three selected accelerograms are compared with the 84th percentile response spectra in Figure 361.16-14.

The lumped mass response spectrum analysis was used to calculate the moment, shears, and structural accelerations for the reactor building, and the finite element time history analysis was performed to calculate the floor response spectra in the reactor building. The results of these analyses indicate that the responses (moments, shears, accelerations, and the floor response spectra) are below the design basis loads.

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REFERENCES Campbell, K.W., 1981; "Near-Source Attenuation of Peak Horizontal Acceleration," Bulletin of the Seismological Society of Ameiica, v. 71, no. 6, pp. 2039-2070, December, 1981.

Idriss, I.M., 1982; "Earthquake Ground Acceleration and Velocities at Close Distances to the Source" paper presented at the 77th Annual Meeting of the Seismological Society of America, Anaheim, California, April 19-21, 1982.

Joyner, W.B., and Boore, D.M., 1981; "Peak Horizontal Acceleration and Velocity from Strong-Motion Records Including Records from the 1979 Imperial Valley, California, Earthquake," Bulletin of the Seismological Society of America, v. 71, no. 6, pp. 2011-2038, December 1981.

Toppozada, T.R., Wells, W.M., Power, J.H., Hanks, T.C., 1975; "Strong Motion Accelerograms of the Aftershocks," in Oroville, California, Earthquake 1 August 1975, CDMG Special Report 124, pp. 101-107, 1975.

Trifunac, M.D., 1970; Low Frequency Digitization Errors and New Method for Zero Base-Line Correction of Strong-Motion Accelerograms, " Ear thquake Engineering Research Laboratory, EERL 70-07, California Institute of Technology, Pasadena@

California, Trifunac, M.D., and Lee, V.W., 1973; "Routine Computer Processing of Strong Motion Accelerograms," Earthquake Engineering Research Laboratory, EERL 73-03, California Institute of Technology, Pasadena, California.

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TABLE 361.16 1 AVAILABLESTRONG MOTION RECORDINGS FROM MAGNITUDE ML 3.8 - 4.2 EARTHQUAKES DATC TIHE HAOIIITUDE IIGGG GITE DIGTAtICC TO! PEAK ACCEL YHD IIHG HD HL HG DEPTII (KH)

RECORD IHO STATION HO'KH)

S'I AT CLAG HYPOC El IC RUPT (KH) (KH) tKCORD- COHP VOL 1 VOL (0) 2 CH/S/8 OROVILLE AFTERS 75 0 3 2h7 9 h.i - 6.8 CINOi CDHG TEHP 1 ADD 12.3 10.2 D01 N90E .Ohh

.'065 38.2 HOCK D STAT 1 AT ORSJILLE C D01 tIOOC 59 <<7 CDHGZ CtiHO TCHP 3 ADD 15.0 13.3 D03 N05M <<021 10.6 STAT 3 AT OROVILLE C B03 805M <<027 '2<<2 CDHGh CDHG TCHP h ACD 11.h 9.1 DOh H35M <<113 101<<i STAT h AT OROVILLC C 80h 855M <<007 79<<b.

CDHG5 CDHO TEHP 5 ACD 10<<O 7<<3 D05 GOOE <<123 107.3 STAT 5 AT OROVILLC C B05 tI90E <<113 107<<5 ON OROVILLC 10 ABB 8.3 h.7 D10 N2hM <<086 00.6 HEDICAL CENTER TCHP D10 SbbM <<ih0 lhd.7 OAP OROVILLE AIRPORT TEHP STAT ii ACD 12.0 9.9 Dii N90M Dli GOOK

<<103

,Oh3 100.2 3h<<2 EDH EARl. DROADliECK 13 ACC 0.0 .i.5 D13 H90E <<15h ihb.8 HOUSE TEHP STAT OROV D13 NOOC <<092 86<<h OIiiVILLE AFTERG 75 Olb 540 9 h<<0 0.8 CDHO1 CDHO TEHP 1 ADD 12.2 G.h POi N90E <<120 97<<1 HOCK P STAT 1 AT OROVILLC C POi HOOE <<170 lhh.h CDHIIh CDHO TrHP . h ACD POh HEI ,Oho 33<<2 STAT h AT OROVILLC C POh 055M .070 60<<0 CDHG5,CDHO TEHP 5 ACD 10.h ~ .5 P05 SOOE .053 h9.3 STAT 5 AT OROVILLE C P05 H90E <<10i 93<<6 CDHII7 CDIIG TEHP 7 ABD 9<<0 1.7 P07 N90M <<071 59.6 STAT 7 AT OROVILLE C P07 SOOM <<062 5h<<9 DJR D. JOIkt".<<ON 9 AAD 10<<2 5i.2 P09 H90E <<'f59 137<<b RAHCII TEHP STAT OROV P09 HOOE .223 205.2 OHC OFiOVII.LE 10 ABB 9.8 h <<h P10 H2hM .099 90<<9 HEDICAL CEtITER TEHP p10 GbeM .031 27.h OAP OROVII I,.E 11 ACD 12.3 0<<5i Pii H90M <<030 31.0 AIRPORT TEHP STAT Pli SOOC .030 32<<h EEL EARL NNADBECK 13 ACC 9,6 3.0 P13 H908 .12h lib <<G HOUSE TCHP STAT OROV P13 tHÃC .070 be <<3

TA8LE 361.16 1 (continued)

DATC TIHC HAGNITUtC UGGS GITE DISTANCE TOE PEAK ACCEL EARTHQUAKE YHD IIHG tID HL HG DEPTII RECORDING STATION STAT CLAG IIYPOC EPIC RUPT RCCORD COHP VOL 1 VOL 2 (KH) HO (KH) (KH) (KH) (8) CH/G/S OROVILLE AFTERS 75 926 231 7 h<<0 9.h CDHGi CDtC TEHP 1 ADD 13<<9 10.2 Toi .091 51<<3 HOCK T STAT 1 AT OROVILLE C TOi <<079 67.8 OROVILLC AFTERS 75 926 231 7 h<<0 9.h CDHOh CtkN TEHP h ACD 12.8 8<<7 Toh N3~4 .050 hh <<h HOCK T STAT h AT OROVILLC C Toh 855II ,O83 7h<<2 CDHO5 CtNO TEHP 5 ACD 119 7<<h TO5 <<135 97<<i STAT 5 AT OROVILLE C T05 '<<

ih3 123<<2 D,IR D<< .XNNGOII 9 AAD 1'2<<0 7<<5 T09 .2h2 238<<8 RA)ICII TEHP STAT OROV T09 ,163 OHC OROVILLE 10 ASD 9.8 2.0 T10 N2hM .081 75<<O HEDICAL CENTCR TEHP Tio S6QI .Oeb 83.8 OAP OROVILLE AIRPORT TEHP STAT ii ACD 12.7 O<<6 N90M BOOC

<<051

<<052 h3.9 51<<6 Et@I CARI DROADBCCK 13 ACC 11.2 6.0 T13 ,OM 51.7 HOUGC TEHP STAT OROV T13 <<091 70<<1 FRIULI SEQUENCE 76 515 h2616 h.2 ib. 0 FOAGARIA-GNII<< ~ Boih ABB 26 .. 21. 1 ro69 HORT .015 ITALY F069 EAST <<020 FRIULI GEQUEHCE 76 6 1 172111 h.2 1. 0 FOROARI A-CORN. ~ Oolh ABD 9.3 9<<2 F07h .02h 22<<5 ITALY F07h <<023 21 <<8 TOLHEiZOy ITALY 0012 ABD 19.6 19.6 F076 .019

- EtlEL FIXED F076 .021 TOLHEZZOy ITALY 0013 ABD 19.G 19<<G F075 NORT .Olh EHCL HODILE F075 CAST <<015 FRIILI GEQUEHCE 76 6 9 18401h h.2 13.0 FOI<<%ARIA-CINH<< ~ 001h ABD 13<<7 h. h F081 HORT <<072 ITALY FOO1 EAST <<Obh HAIAHO A ~ ITAI Y 8016 ACD 16 <<3 9.0 F086 NORT .015 rREc r.lELD FOO6 EAST <<012 TOLHE<<.ZOy ITAI Y 0012 ABB 18<<8 13<<b FOO3 HORT .03h ENEL FIXED F003 EAST <<031 ITALY 0013 10<<0 13.G I 082 NORT <<03h

-IOLHEiZOy CtlEL HODILE ABD FOG2 CAST <<029 FRIULI SEQUENCE 76 7th 53920 ' <<2 15.0 TARCCMTOe ITALY 8011 ABD F2.2 15.6 F113<< HORT .075 F113 EAST .066 HAIAHO A ~ ITALY 0016 ACD 29<<3 26.7 F114 tNRT <<011 FREC FICLD I. 114 EAST .008

TABLE 361.16 1 (continued)

DATE TIHE )(AGNITUDE USGG GITE DISTANCE TOL PEAK ACCEL EARTHQUAKE Y H D ll H 8 ND HL NG DEPTll RECORDING GTATIOH STAT CLAG HYPQC EPIC fii'T RECORD CON VOL 1 VOL 2 (KH) NO (Kll) (KH) (KN) (8) Cll/8/8 FRIULI GEOUEHCE 76 715 1259 O 3eB 1 eo TARCENTOi ITALY 0011 ABD 11 o 7 11.7 F119 NORT .033 F119 EAST e045 FRIULI GEOLKHCE 76 9 G 192012 4eo ieo TOLHE ZOp ITALY 8012 ABB ih e 0 14,0 F120 NORT e 021

- EHEL FIXED F120 EAST :O22 DUIAy ITALY 0023 ABC 13eh 13.4 F122 HORT e 033 F122 EAST e 023 FRIULI GEOUEHCE 76 915 94554 4.1 27. 0 TOLHEZZOg ITALY 0013 ABB 33e3 19.5 F180 NORT e 029 EHEL AGILE F180 EAST e 018 FOROARIA-CORN., 8014 ABB 27 0o F179 HORT e029 ITALY F179 EAST e 044 IHPERIAL AFTERS 791015 1G1039 3oO 5.0 DONDS CORNER M~il ADD 32. 2 31 e O A02A 850M o 029 HOCK A02 A02A 840E e 129 EL CEHTRO ARRAY 0 bl 14JGTOH ROAD 942 ADD li e G 10e5 A02B G~AQ A02D 840E e 167 ei13 FL CENTRO ARRAY 5020 ADD 11eb ioeh A02C P5M e027

~ 70 IMPERIAL VALLEY A02C $ 40E e021 EL CEHTRO ARRAY K% ADD 12o3 11.3 A02D Ml .042 t Os 9S EAST CRUICKG A02D 840E e039 EL CEHTRO DIFFEAEHTI 5165 ADD 13 o 8 12 e 9 A02F HMN e047 AL ARRAYa DOOLIOOD RO A02F H90(l e051 HOl.TVILLE POST .ooM ADD 20e 9 20.3 A020 HhSM e026 OFFICE A020 845ll e037 IMPERIAL AFTERS 79101S 162553 hoo Oo 1 DRAMLEY AIRPORT R450 ADD 1'9o5 17e7 A0W Hhm .023 llOCK A05 A05A 8454 e017 EL CHAT% ARRAY '95G ADD 9e7 5o4 A05B CRN e026 0 Oa 95 EAGT CRUICKG A05D 340E o022

'i IMPERIAL AFTERS 791015 1655 3 4o2 5oo DRAMLEY AIRPORT Feobo ADD 24.9 24eh A07A HhQI .074 HOCK A07 A07A Gh&$ .062 EL CEHTRO ARRAY 952 ADD iG.O ibo 1 A07B ~~ .060 0 Sl 2801 JANEG ROAD A07D 840E e 059 EL CENTRO ARRAY 'N2 ADD 14.4 13e5 A07C mN . 124 0 bl HUGTON ROAD A07C 840C ,079 IMPERIAL AFTERG 791015 172214 4.2 10,0 LSALILEY AIRPORT ~e060 ADD 10. 6 3e ~o AiOA N45W ~ l70 A10A Sh5Q e 169 HOCK A10

TABLE 361.16 1 (continued)

DATE TIHE HACH IT UDE IISGG GITE DIGTAttCE TON PCAK NXEI.

YHD llHG HD tlL HG DEPTII. RECORDING STATION TAT CLAG HYPOC Ef'IC RUPT RECORD COtli'OL 1 VOL 2 (KH) NO (KH) (KH) (KH) (0) CH/8/0 IHPERIAL AFTERQ 791015 172214 4.2 10.0 CAI IPATRIA FIRE ri061 DDD 21 o G 19 o 1 AlOB H45M .005 HOCK A10 GTA (CT40) AiOD 045M o 011 EL INTRO ARRAY .ii15 ADD 10. 1 15.1 A10C GSOM .010 4 2I KEYSTONE ROAD A10C 840M .017 IHPERIAL AFTERS 791015 1039 3 4.0 2oO DRAMLCY AIRPORT roOCO ADD 5i.2 4,0 A1GA H45M s000 HOCK Aib AibA 845M s 028 IHPERIAL AFTERS 791015 23 439 4.0 OoO EL CEHI'Rll AN<AY 952 ADD 12s 1 9o 1 A2GA 850M o040 HOCK A26 t 51 2801 .IAHCGi ROAD A26A 840C o041 EL CEH'ITALO ARRAY 958 ADD 13o9 11.3 A2GD GSOM .047 f OI 95 EAST CRUICKG A260 $ 40C o033 IHPERIAL AFTERG 791015 231346 h.i 0.0 EL CCHIO ARRAY 952 ADD 13.2 10o5 A27A GSOM .077 HOCK A27 ~ St 2801 .IAHEG ROAD A27A S40C s 053 IHPERIAL AFTERS 791016 02324 hs2 9.0 El. CEHTAO ARRAY 952 ADD 11.3 6.9 A32A GSOM o 010 HOCK A32 0 5I 2001 JAHE'0 ROAD A32A S40E o073 IHPERIAL AFTERS 791016 4.0 EL CIRRO ARRAY 952 ADD 14.3 10s3i L~AA ~~M .077 HOCK A34 I Sl 2801 JAHEG MAD A31A S40E s047 IHPERIAL AFTERS 791016 5 146 1.0 ihoh EL CEHTRO ARRAY ili5 ADD 20si iho0 A36A GrrM o 101 llOCK A36 t 2I KEYGTONC ROAD A36A 840M .046 s EL CEHTRO ARRAY 952 ADD 15oO 4.3 A36D GSOM o137 4 58 2801 JAHCG ROAD A360 ShOC o 153 IHPERIAL AFTERG 791017 121130 4.1 15s9 DRAMLEY AIRPORT 5060 ADD 19o4 11 2 A43A H45M ,034 lIOCK A43 A43A 845M s040 HAHHOTH LAKES 00 527 2341 1 .3.9 7.2 COtNICT LAKE CON AAB 8.2 hsO H009 MEST .12G 115ob DIGTAL HO 9 H009 MUT o075 66sO HCOEC CREEK HGC AAB 9.0 5oh HO09 HORT o OGO 57. 1 H009 EAST o059 56.3 FIGI< AIID GAHE FIB ABC 9.9 bo 0 H009 NORT ,042 40oG CXPERIHEN TAL STATION tf009 EAST o023 23. 5 HAHHOTH LAKES 00 527 235743 9 3s2 FIGill AND OAHE FIG ABC 9.6 9o 1 HO10 NORT o 044 13.2 DICTAL tIO 10 EXPERIHENTAL STATION H010 EAST o 034 33o3 Hcnrv cRrzK HGE AAB 10o1 9.9 HO10 NORT ~ Oli 10.9 HO10 EAST F 014 13o8 CAbHRAUGH RAttCII CDR ABC 15. 7 15. 4 H010 NORT s 009 H010 E'AST . 008

~ f

~ ll(

J

TABLE 361.16 1 (continued)

DATC TINE NAGXITIIDE (ISGG fiITE DISTANCE TO< PEAK ACCEL EARTHQUAKE Y N D II H 0 HD HL HG DEFAl RECORDING STATION STAT CLAG IIYPOC EPIC RUPT RECORD COHP VOL 1 VOL 2 (KN) HO (KN) (KN) (KH) (0) CN/0/G HAHHOTH LAKES 00 528 1 2M 3 0 1.7 HCOKE I'AKEK NK AAB 5oO 3o3 H011 NORT .015 13o8 DIGTAL NO ii H011 EAST .039 37o 7 NAHNOTH LAKES 00 528 1 258 3.0 1.7 FISH AXD OANC FIG ABC 6.1 1 o3 H011 .001 79 o3 DISTAL NO 11. EXPER INEHTAL STAT IOX N011 o 081 78ob IIOT CRCEK FARN IICF ABC 9. 0 7. 7 H011 HORT o022 H011 EAST o023 CDR ABC 11.3 10.3 N011 HORT o 008 N011 EAST .006 NAHHOTH LAKES 80 520 12210 3.0 ~ 3.2 f'ANIVICT LAKE rm AAD 11.0 H012 IKGT .035 DIOTAL HO 12 H012 GOUT o 025 HCCKE CREEK HfoE AAB 17. 1 iG.8 H012 NORT o 009 N012 EAST o 008 NAHNOTH LAKES 00 520 115137 ho2 3.1 HCGEE f.'IIEEK HGF. AAB 11 o 1 13. 7 N018 NORT o0h2 DIOTAL HO i8 H018 EAST o029 COINICT LAKE CON AAB 16.3 15.9 H010 MEGT o006 H018 GOUT o 005 FISH AND OAHE I.IS ABC 10.9 10ob N010 HORT o 011 EXPERIHEHTAL f'iTATIOX N018 EAST o 016 CASIIDAIJUH RAHCH CBR ABC 26.1 25.9 H010 HORT o 007 N010 EAST o007 HAHIIOTH LAKES DIOTAL HO 21 00 529 11852 1.0 ii oh HCGEE CREEK NOE AAB 12.2 1 o5 H021 HORT H021 EAST o 089 o072 COINICT LAKE COH AAB 13.1 7.2 N021 LIEST ~ 203 H021 GOUT o 126 T'IGH AND GANE FIG ABC 11.7 9.3 H021 HORT o 020 EXPCRI HEN TAL STAT ION N021 EAST o012 CAQIDAUGH RANCH I'.DR ABC 19 o 9 1G.1 H021 HORT o015 H021 EAST o013 HAHIIOTH LAKES 00 529 1721 1 1.0 1.2 HCGEE CREEK NGE AAB 0.3o 7o 1 H026 HORT ~ 052 5iob DIOTAL NO 26 H026 EAST o060 57ob CONVICT LAKE COH AAD 9.9 8 9 N026 C'EST o065 57o9'0oh N026 GOUT .Ohh CASHDAIJGH RAHCII CDR ABC 19. 1 10. G N026 NORT o 008 tN2G EAST o 006

0 TABLE 361.16 9 (continuedl DATE TIME HAGNITUDE IKCG GITE DIG'I'AHCC TOa PCAK ACCEL EARTHQUAKE Y H D fl H '0 MD HL HQ DCI'Ttl IKCORDINO STATION O'I AT CLAG tIYPOC EPIC RUPT RECORD C~ VOL 1 VOL 2 (KH) NI) (KH) (KH) (KH) (0) CH/0/S MAHIIOTH LAKES 80 530 1949 2 3<<0 6.3 CONVICT IAtX I'OH AAB 7.4 3.0 H030 .076 G3<<7 DISTAL NO 38 H030 <<103 92<<3 HAHtIOTII LAKES 00 530 -1949 2 3.0 G.3 FISH AND NWC F 0I ABI: 9 <<5 7. 1 HORT .028 27 <<3 DISTAL NO 38 CXPER IMENTAL STATION EAST <<015 13<<4 HCOEE CREEK HIX 'Su'iB 1O.O 7.0 NORT <<055 52<<0 EAST <<054 51<<5 HOT CREEK FARM IICF ABC 11.2 9.3 HORT .Oh2 EAST <<042 MAMMOTH LAKE8 00 531 101131 4.1 3<<3 CONVICT LAKE COII AAB 4.3 2.0 M042 lJEGT . 112' 110. 1 DIGTAL HO 42 H042 GOUT 152 146<<8 NK AAB 5. 1 3<<.9 H042 HORT .062 58.1 H042 EAST <<059 58<<2 FISH AIID GAME FIG ABC 5. 1 3<<.9 H042 HORT <<142 140.5 EXPERIMENTAL STATION Hoh2 EAST <<055 51<<7 INT CAFES FARH Wr- ABC O<<O 7.3 M042 HORT .054 H042 EAST <<036 CASIIBAUGH AAHCII CDR ABC 11, G 11. 1 M042 HORT .01 M042 EAST <<012 MAIIIIOTIILAKES 00 531 $ 52019 3.9 6.6 HCGCE CREEK NK AAB 7.4 3<<.7 H051 HORT <<nbh 60.2 DISTAL NO Si H051 EAST <<049 48.3 FISH AND GAME FIG ABC 0<<0 4<<5 H051 HORT <<076 74.6 EXPER IHCH'I'AL STATION HO51 EAST <<065 CONVICT LAt(E CON AAB 0<<9 b<<O H051 C'EST <<102 89.7 H051 SOOT <<155 152<< 1 CASIIDAIIGII RAHCII CBR ABI: 12.1 10 1 HOS<<i HORT .030 H051 EAST <<020

~

MAMHOTII LAKES DIGTAL HO 55 00 ~31 2315 'J 9 11<<4 FIGII AND AAMC EXICRIHENTAL GTATIOH I IG . ABC ii<<5 1 <<1 H055 HORT HOS5 EAST

<<074

.026 CONVICT LAI(C IOtt AAB ii 4 2 3 HOi <<5 MEST HOSS GOUT

.095

.067 HCrCE CREEK HrE AAB 13,2 4<<b M055<< HORT .040 MOSS EAST .019 CASHBAUAII AAIICII CDR ABC 14.1 0<<2 HOSS NORT .047 tIOSS EAST .045

l I1 i'

TABLE 361.16 1 (continued)

DATE TIHE HAGNITUDE llMS GiITE DISTANCE TON PEAK ACCEL YHD llHG HD NL HG DEPTtl AECOADIHO STATION STAT CLAG HYPOC EPIC RUPT RECOAD COHP VOL 1 VOL 2 (KH) NO (KH) (KH) (KH) (0) CH/S/0 HAHHOTH LAKES 00 6 2 102220 4<<i 4<<b CONVICT LAKE COH AAB 7<<4 5.0 N065 IJEGT <<097 05:4 DIOTAL NO 65 H065 SO(lT <<083 80<<2 HAHHOTH LAKES 00 6 2 102220 4.1 4<<b FISH AND GAHE FIG ABC 9<<b 8<<4 H065 HORT .052 50<<3 DIGTAL t(O 65 EXPEAIHEHTAL GTATI(IH H065 CAST <<027 20.2 WT CREL1C l ARN l(CF ABC 9.9 0<<7 H065 HORT <<032 H065 EAST <<052 NGr. AAB 12 <<0 ii <<9 H065 NORT H065 EAST

<<032

,018 CASI(BAlJGH AANCtl CDR ABC 14,0 13,2 N065 HORT <<020 HOG5 EAST <<011 HAHHQTH LAKES 00 6 2 203414 3.9 5.0 COtNICT LAt(E COH AAB 6.3 3<<9 H067 WEST .113 96.5 DIGTAL ttO 67. H067 SOUT <<092 85<<0 FISH AND GAHC FIG ABC 0<<7 7<<1 H067 HORT <<037 36<<0 EXPEAIHEHTAL GTATIOH H067 EAST <<027 25.2 HCGEE CREEK NGE AAB 0.7 7.2 H067 HORT .041 42.4 H067 EAST <<035 34.6 l(OT CREEK FARH llCr ABC 10.7 9<<5 H067 HQRT <<030 H067 EAST <<055 CDR ABC 14. 9 14 <<0 H067 HORT <<011 H067 EAST <<011 HAHHOTH LAKES 00 6 7 231752 4.3 tlOT nmCK FARH llCF ABC 5.2 3.0 N112 NORT .071 DIGTAL tQ 112 H112 EAST <<076 l'IGll AHD GAHE FIG AB(: b<<0 4.2 H112 HORT .029 27.0 EXPEAIHENTAL GTATIOH H112 EAST <<021 22.5 CASNBAUGH RANCll CDR ABC 8. 6 7. N112 .020 27.2 N112 <<010 '18<<4 NCGEE Cf<EEK NGE AAB 11. 4 10 <<6 H112 HORT .011 H112 EAST <<013 HAHHOTH LAKES 00 6 0 62527 3.9 0.0 HCGEE CAEFK HGE AAB 10.0 7 <<3 H113 HORT <<017 DIGTAL HO 113 H113 EAST <<029 rloll AND mHE rlo ABC 12.5 H113 HORT <<Oh0 CXPEAIHENTAL GTATIOH H113 EAST .025 HOT CREEK FARH I(CF ABC 14. 7 12. 4 H113 NORT <<071 H113 EAST <<065 0<<0 CASHBAUM AAHQI CDA ABC 10<<6 16<<O H113 NORT .022 H113 EAST .021

EXPLANATION Station FIS I

~ ~0~ ~ ~ ~ ~ ~ ~~ Stat>on HCF x z~ Station MGR Station CON Spectral Damping ~ 2%

4 0 IS 4 rl cc I l C

O )

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5 t

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0.01 0.03 0.1 0.3 10 Period, sec WASHINGTON PUBLIC MEDIAN SPECTRAL SHAPES FOR POWER SUPPLY SYSTEM MAMMOTH LAKES RECORDING STATIONS: Figure ML 3.54.5, HYPOCENTRAL DISTANCE 361.16-1 Nuclear Project No. 2 0-'10.5 km

0.3 4

4' G c~

0.1 4 4 SR g

C O

0.03 5

dC CL 0.01 db e o e ee' 0.003 EXPLANATION Oroville Stiff Sites Oroville Deep Sites 4 Mammoth Soil Sites 0.001 1 10 30 Hypocentral Distance, km WASHINGTON PUBLIC RECORDED PEAK ACCELERATIONS FOR POWER SUPPLY SYSTEM Figure SELECTED DATA SET ML 3.8W.2, 361.16-2 Nuclear Project No. 2 SO I L SITES

EXPLANATION Oroville Deep Sites Q Oroville Stiff Sites Mammoth Soil Sites 0.3 G

0.1 Ql C

Q Cg

~

0.03 o

0,01 84th Percentile C

e ee~,

Median 0.003 16th Percentile 0.00'1 10 30 Hypocentral Distance, km WASHINGTON PUBLIC ATTENUATION RELATIONSHIP FOR POWER SUPPLY SYSTEM Figure ML 4.0 EARTHQUAKES OBTAINED 361.16.3 Nuclear Project No. 2 BY NONLINEAR REGRESSION

EXPLANATION Oroville Deep Sites Q) Oroville Stiff Sites Mammoth Soil Sites 0.3 C

Cy~ W 0.1 Ol C

O

-" 0.03 CL 84th Percentile 0.01 O'> ~

Median C

C CC

~16th Percentile 0.003 0.001 3 10 30 Hy pocentral Distance, km WASHINGTON PUBLIC ATTENUATION RELATIONSHIP FOR POWER SUPPLY SYSTEM Figure ML 4.0 EARTHQUAKES WITH 361.164 Nuclear Project No. 2 B CONSTRAINED TO - 1.89

EXPLANATION Dieeenee Renge 7.6 10$ km

~o ~~ ~ ~ ~ ~ ~ ~ Distance Range 5.1 -7$ km Spectral Damping 2%

O 4

cO C

IJh eo 4

~ +or 0

0,01 0.03 0.1 0.3 10 Period, sec WASHINGTON PUBLIC EFFECT OF HYPOCENTRAL DISTANCE ON POSER SUPPLY SYSTEM Figure SPECTRAL SHAPES: MAMMOTH LAKES 361.16-5 Nuclear Project No. 2 RECORDINGS ML3'8 4'2

~ 'I

,l t

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lO O

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Dl EO 2 I-0 0.01 0.03 0,1 0.3 10 Period, sec.

WASHINGTON PUBLIC MEDIAN SPECTRAL SHAPES Figure POWER SUPPLY SYSTEM FOR MAGNITUDE ML 4 EARTHQUAKE 361.16-6 Nuclear Project No. 2 2%, 5% AND 7% SPECTRAL DAMPING

'I 2 1r fl

I EXPLANATION Range of 84th Percentile Range of Median 025g SSE Spectral Damping ~ 2%

r (

ll l

ll 1I

~llri)aiNI l

0.01 0.03 0.1 0.3 Period, sec.

WASHINGTON PUBLIC ESTIMATED RESPONSE SPECTRA FOR POWER SUPPLY SYSTEM Figure ML 4'0 EARTHQUAKE IN DISTANCE 361.16-7 Nuclear Project No. 2 RANGE 3 5 km: 2% SPECTRAL DAMPING

~ t ~'

1.75 EXPLANATION'ange of 84th Percentile 150 0.25g SSE Spectral Damping ~ 5%

125 c 1.00 8

o.

075 lA 050 l

0.25 lL (I1 llllmil, L 0.01 0.03 0.1 0.3 10 Period, sec.

WASHINGTON PUBLIC ESTIMATED RESPONSE SPECTRA FOR Figure POWER SUPPLY SYSTEM ML 4.0 EARTHQUAKE IN DISTANCE 361.16-8 Nuclear Project No. 2 RANGE 3 5 km: 5% SPECTRAL DAMPING

1.75 EXPLANATION Range of 84th Percentile lllllllllilI"Iiiilii""~"<<d' 0.25g SSE Spectral Damping ~ 7%

125 1.00 O

0.75 O

CO ll 025 lL gffgfll If) etlg L

0.0'I 0.03 0.1 . 0.3 10 Period, sec.

V/ASHINGTON PUBLIC ESTIMATED RESPONSE SPECTRA FOR POWER SUPPLY SYSTEM Figvre ML 4'0 EARTHOUAKE IN DISTANCE 361.16-9 Nuclear Project No. 2 RANGE 3 5 km: 7% SPECTRAL DAMPING

~ t' 0.1 0.03 0.01 Range for San Fernando Data.

0.003 CV c

c 0.001 O // e

~ ~

c Range for ML 4.0 Data LLI 0.0003 0.0001 EXPLANATION

,+ Mammoth Soil Sites ML 4 0+02, Distance 0 10.5 km Orovilte Soil Sites ML 4.0+0.2, Distance 0 10.5 km 0.00003

~ San Fernando Soil Sites 0-40 km ML 6.4, Distance 0.00001 0.001 0.003 0.01 0.03 0.1 0.3 Peak Acceleration, g's WASHINGTON PUBLIC PEAK ACCELERATION VERSUS TOTAL POWER SUPPLY SYSTEM Figure ENERGY C NTENT FOR ML 4 AND 6.4 361.16-10 Nuclear Proiect No. 2 EARTHQUAKE RECORDINGS

OQ 0.20 mm A ~X A05SOOE

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cp

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C

~ L 1.75 EXPLANATION 1.50

+

N07N90W Scaled 84th Percentile Spectrum for ML40at3km P06S55E Scaled to 0.23g to 0.31g

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ A05SOOE Scaled to 0.29g 0.25g SSE Spectral Oamping 2%

1.25

+ il

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'<<l) 0.01 0.03 0.1 0.3 10 Period, sec.

WASHINGTON PUBLIC COMPARISON OF SCALED OROVILLE AFTERSHOCK SPECTRA WITH Figure POWER SUPPLY SYSTEM 84th PERCENTILE SPECTRUM 361.16-14 Nuclear Project No. 2 FOR ML 4'0 EARTHQUAKE

< I I