ML20039G609
| ML20039G609 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 01/11/1982 |
| From: | Davidson D CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | Tedesco R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8201180487 | |
| Download: ML20039G609 (10) | |
Text
TH E C L EV E L A N D E LE CT RIC IL L U bilN ATIN G C O M P A N Y P.o. Box 5000 e CLEVELAND, OHlo 44101 m TELEPHONE (216) 622 9800 e ILLUMINATING BLDG e
55 PUBLIC SoUARE Daiwyn R. Davidson
" "9
- 0 # E C#U " "' ## ####"
VICE PRESIDENT
'. C)
.[
SYSTEM ENGINEEHlNG AND CONSir4UCTION Q[';~. r January ll, 1982
. " #.. m" #
t s
Mr. Robert L. Tedesco
,g' Assistant Director for Licensi" Division of Licensing JAN 1519825 U. S. Nuclear Regulatory Cccmission
'sudy.] Q W Washington, D. C.
20555
(
7 h"
Perry Nuclear Power Plant
\\
' e>; \\
/
Docket Nos. 50 M 0; 50-M1 Response to Request for Additional Information -
Geology-Seismology
Dear Mr. Tedesco:
~
This letter and its atts.chment is submitted to provide draft responses to the sdditional questions raised by Dr.
Ibrahin on 1,he geology-seismalogy of the Perry Nuclear Power
' Flant. sEncloLed is _a new response for question 230.3 which supercedes the old. response. Supplemental information is
, rovided fot questica 230.6 in add; tion to the response p
previous](;provided.
-it.iu our intension to incorporate these responses in a subsequent ' amendment to our Final Safety Analysis Report.
'Very Tr' ' -- vaurs, f{l Eh/
jVDalwynR.Davidson Vice President System Engineering and Ccnstruction 1
s DRD: mibs Attachment cc:
G. Cha1 Toff, Esq.
(0c/
M. D. Houscon -
^
NRC Resident Inspector S
- s, g g e
s.
vs 82011eo4g7 820111 PDR ADOCK 05000440 PDR
~
i Question 230.3 Update the seismicity map within 200 miles of the site since the issuance of the FSAR and modify FSAR Figure 2.5-59 and Table'2.5-7.
Answer 7
Section 2'.5.2 of the FSAR was prepared according to
^
Regulatory Guide 1.70, Revision 3 (1978) in which recommended thresholds are " magnitudes greater than 3.0 and intensities greater than IV(MM)."
The thresholds of Revision 3 differ from those of Revision 2 only with respect to intensity; Revision 2 required " intensities greater than III(MM)."
Because the Perry i
FSAR contains a special Appendix (2D-D) which addresses all historical events within a 50-mile radius without any intensity threshold, it provides supplemental information on t' hose small local earthquakes that would be covered by the more conservative threshold of Revision 2, and could be of interest for the site.
To update the seismicity information of Section 2.5.2 j
prepared in the fall, 1979, seismological ca'alogs that cover c
the 200-mile radius region around the site were searched.
These include the Central Mississippi Valley Earthquake Bulletins (St. Louis University Network), the United States Earthquakes 1977 and 1978, the Monthly listings (NEIS), and i
finally the Northeastern United States Seismic Network I
I Rev.
. Bulletins, up to the last one published, No. 21.
A preprint of a m!.croearthquake list for the Anna, Ohio region was obtained frem the University of Michigan.
These sources provide the necessary coverage to update Table 2.5-7 up to the end of the year 1980.
Only two events within 200 miles of the site were found through this update, one on the Niagara Peninsula, the other on Western Lake Erie.
An update of FSAR Figure 2.5-59 and an update of the last page of Table 2.5-7 are now presented.
The Kentucky Earthquake, located 265 miles from the site, has also been included in Table 2.5-7, since it falls within the search coordinates of the table.
Its isoseismal map 4
is included as part of the answer to Question 230.8.
Similarly, an updated last page of Table 2.5-13 is provided; it includes the Kentucky Earthquake.
The Kentucky Earthquake is a moderate event that occurred on July 27, 1980 near Sharpsburg, Kentucky.
The National 1
Earthquake Information Service (Monthly Listing) computed a preliminary origin time of 18:52:21.8 (GMT), epicentral coordinates at 38.17'N and 83.91*W, and a magnitude 5.1m
- b l
The maximum reported intensity was VII (MM), mostly based on broken chimneys of older consturction, cracked and f allen plaster, overturned and rotated tombstones, and few instances of moderate structural damage to concrete block and brick buildings.
Although the epicenter was located near Sharpsburg, some of the worst damage was observed in Maysville, Kentucky, l
about 30 miles north of the epicenter, where alluvial sediments along the Ohio River contributed to the ground motion Rev.
. amplification.
In the immediate epicentral region, an intensity VI (MM) was predominantly observed, as shown on the isoseismal map.
A right-lateral strike slip motion along a fault plane oriented N42*E and dipping 50*, has been inferred, and a focal depth estimate of 15 km calculated for this event (Mauk et al.,'1981, in press B.S.A.A.).
Using Gupta and Nuttli's attenuation model and an epicentral intensity VII (MM), the calculated intensity at the Perry site is III (MM); this is in agreement with the felt reports observed on the isoseismal map.
The area of perceptibility has been 2
2 estimated to be approximately 675,000 km (260,000 mi
),
This event is probably associated with splay faults of the Kentucky River Fault System.
Because the Safe Shutdown Earthquake at Perry accomodates an Intensity VII (MM) and its equivalent magnitude, this event does not create any problem.
To assure completeness, Dr. Edward Walter, of John Carroll University Seismological Observatory, in Cleveland, was contacted about any local event that might have been missed by the U.S.G.S., St. Louis U.
and N.U.S.S.N. networks, but could
{
have been detected by the local station (CLE).
The answer was i
that no local events have occurred since the last one reported in Appendix 2D-D.
Professor Walter commented that the Cleveland area is a quiet region, with only infrequent small events.
In conclusion, the upcated seismicity within 200 miles of the site does not reveal any new data suggesting that the original assessment of the SSE should be changed.
Rev.
SUPPLEMENT TO QUESTION 230.6:
Three additional sensitivity tests have been run for the purpose of confirming the consistency of the results and illustrating the fact that the Parkfield earthquake is an anomalous event.
Tables 1 and 2 (revised) present all relevant data.
Figure 20 shows the response spectra obtained whenever two components from the Temblor Station (Parkfield earthquake) are included.
The 84th percentile peak acceleration increases 2
2 from 98.9 cm/sec to 153.3 cm/sec, and the spectral level is considerably raised over the entire period range.
Figure 21 and 22 show the response spectra obtained when two events of M =6.0 and three events of M =6.0,6.0 and 6.1 are added *o g
g the basic subset.
As shown on Table 2 (revised), the peak acceleration at the 84th percentile is very similar, i.e.
133.0 and 131.6 cm/sec.
The spectra are almost identical.
The interesting point to be noticed is that these spectra are lower than those obtained with the inclusion of the Temblor components to the basic subset, although they include the contributionr, of events of M =6 level.
These sensitivity g
tests suggest that the Parkfield data obtained at Temblor might indeed correspond to a much higher magnitude level (M =6.4 g
and 6.7) as calculated by Kanamori and Jennings.
On that basis, these records would not be acceptable to model the design earthquake m =5.3.
b
e TABLE I (Revised.)
ACCELEROGRAMS USED FOR PERRY SITE SPECIFIC RESPONSE SPECTRA Epic.
Hypo.
- Peak, Dep th Rif.
Dist.
Diat.
Acc.
Da te Time (UT) mb ML (km) 7 Location No.
(km)
(km)
(gals)
Comp.
Station 3
NW 281935 14:41:54 5.00 5
VI M lena, Montana U297 5.8 7.7 76.8 N
Helena Fed. Blds E
83.0 SEP 12 1970 14 :30:52 5.2 5.4 9.0 VII Lytle Creek W335 20.3 22.7 69.8 585'E Cedar Springs 54.9 SOS *E Allen Ranch JAN 12 1975 01:37:17 4.7 5.2 2.0 VI Cape Mendocino PC175 16.0 16.1 92.1 S60*E Petrolia.
72.4 N30*E Cape Mendocino AUC 01 1975 20:20:00 5.8 5.7*
15 IX oroville, CA OS875 12.0 19.2 90.6 N37*E Oroville Seismic 82.5 N53*W Station AUG 061979 17:05:23 5.4 5.9 Su rf ace VIII Coyote lake CYCLI 9.1*
9.1 111.1 320*
Gilroy Array No. I Rupture 83.7 230*
SEP 11 1976 16:31:00 5.0 5.5 9
VIII-Friuli, Italy 1132 15.5 17.9 66.6 EW San Rocco IX 35.5 FS SEP 11 1976 16:35:00 5.3 5.9 6
IX Friuli Italy 1139 14.0 15.2 84.9 NS San Rocco 84.2 EW SEP 15 1976 03:15:19 5.7 6.1 9.0 VIII-Friuli, Italy 1153 9.0 12.7 118.6 EW San Rocco 77 59.8 NS OCT 31 1935 18:37:56 5.4 6.0 8
VII Montana 8025 6.6 10.4 14 3.5 N00 *E Carroll College 142.5 N90*E JUN 281966 04:26:12 5.8 5.6 Surface VII Parkfield 5037 16.1**
16.1 264.3 N65'W Temblor 340.8 E25'W SEP 15 1976 09:21:18 5.4 6.0 11.7 IX Friuli Italy 1169 20.0 23.2 12 4.8 NS San Rocco 230.4 EW
- mgnit ade quoted is 5.7 BRK" - U. S. Earthquakes.
t 0"Richt er magnitude ** - Chanr, 1978.
- Joyner, Boore and Porcella (1981) - Closest approach of surface projev: tion of rupture.
- Boore et al (1978) - Closest approach of rupture.
TABLE 2 (Revised)
STATISTICS FOR PERRY SITE SPECIFIC SPECTRA Average Median Mean Peak Acc.
Epic.
Peak Peak 84th Average Distance Acc.
Acc.
Percentile No. of No. o f No. o f 2
2 2
ML (Km)
(cm/sec )
(cm/sec )
(cm/sec )
Components Stations Earthquakes 1.
Basic Subset 5.51 13.3 75.2 78.1 98.9 14 6
7 (Strict Criteria)
+.33
+ 4.71 2.
Basic Subset 5.63 12.1 81.8 86.6 114.6 18 7
9 plus two
+.3 7
+ 4.7 9 ML 5.9 3.
Same as above plus 5.63 12.5 93.2 106.3 155.6 20 8
10 Parkfield included
+.35
+ 4.69 4.
Basic Subset 5.53 13.66 89.5 103.4 153.3 16 7
8 Parkf ield included
+.30
+ 4.4 9 5.
Basic Subset 5.62 13.31 88.4 96.1 133.0' 18 7
9 Plus 2 M =6.0
+.36
+ 5.25 L
6.
Basic Subset 5.67 12.88 88.0 95.4 131.6 20 7
10 Plus M =6.0,6.0 g
and 6.1
+.3 7
+ 5.14
Q
'4 g#"
,,4 p-PERRY
\\ DESIGN SPECTRUM 10'
\\
\\
^
/
/
_/
/'
84th PERCENTILE
~
/
\\,
MEAN MEDIAN
-y R
b;90
\\/
8
~
\\
- 2
,/
10.
\\/
N/
x IO~t 10-8 10'
ERIDO (SEC)
IEDIAN, MEAN AND 84TH PERCENTILE RESPONSE SPECTRA FOR PERRY (ROCK) SITE (Basic Subset, ParkfiejC Included, 5% Damping)
F1 Ure 20 9
4 9
=
9
'O %
c 9g 6,
'4 o
s PERRY ESIGN SP TRUM 10',
p
/
h'/
]
84th PERCENTILE f
lf
~
MEAN 7
[
MEDIAN 8
/
R hlO*
e Y
/
10
/
N N /
\\
N j
/
\\
10-2 g,
10' PERIOD { SEC)
EDIAN, KAN AND 84TH PERCENTILE RESPONSE SPECTRA FOR PERRY (ROCK) SITE (Basic Subset, Magnitude Range Extended to Include Two Events With Magnitude M 4.0, 5% Damping)
L F
e 21
r d
c 'g N
C 4
/o p,
g o,
g.
PERRY DESIGN SPECTRUM 10'
~
9*
84th PERCENTILE
,/
\\
/
MEAN N
-^
MEDIAN I
=,e
'N
/
10
i N
N N
/
\\
10-2 10-'
loo 10' PERIOD (SEC)
EDIAN, FEAN AND 84TH PERCENTILE RESPONSE SPECTRA FOR PERRY (ROCK) SITE.
(Basic Subset, Magnitude Range Extended to Include Three Events With Magnitude Q=6.0, 6.0 and 6.1, 5% Damping) en