ML18017A607

Forwards Seismic Monitoring Program Rept for Apr-June 1979. Responses to NRC 790713 Questions Re Program Encl

ML18017A607
Person / Time
Site:	Harris
Issue date:	07/30/1979
From:	Mcduffie M CAROLINA POWER & LIGHT CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
References
NUDOCS 7908060263
Download: ML18017A607 (35)

Text

REGUL RY INFORMATI'ON DISTR IBUTI SYSTEM (RIDS)

ACCESSION NBR:7908060263 DOC ~ DATE: 79/07/30 NOTARIZED:

NO FACIL:50-I$00 Shearon Harris Nuclear Power Pl anti Unit 1 i Carolina 50-401 Shearon Harris Nuclear Power Plant~ Unit 2i Carolina 50-402 Shearon Harris Nuclear Power Plant< Unit 3p Carolina AUTH,NAME AUTHOR AFFILIATION MCDUFFIE~M.A.

Carolina Power a Light Co.

RECIP ~ NAME RECIPIENT AFFIL'IATION DENTONzH ~ Ro Office of Nuclear Reactor Regulation

SUBJECT:

Forward ds second quar terly seismic monitoring program rept for Apr"June 1979iResponses to NRC 790713 questions re program encl.

DISTRIBUTION CODE:

B001B COPIES RECEIYED:LTR /

ENCL /

SIZE:

TITLEt PSAR/FSAR AMDTS AND RELATED CORRESPONDENCE'OCKET 05000400 05000401 05000902 RECIPIENT ID CODE/NAME ACTION; '5 PM m I A'EC BC L QJR INTERNAL:

0 REG F

06 09 GEOSC IEN BR 11 MECH ENG BR 13 MATL ENG BR 16 ANALYSIS BR 18 AUX SYS BR 20 I 3

C SYS BR 22 AD SITE TECH 27 EFFL TRT SYS 29 KIRKNOOD AD PLANT 'SYS AD SITE ANLYSIS HYDRO-METEOR BR OELD EXTERNAL: 03 LPDR 30 ACRS COPIES LTTR ENCL 1

1 1

0 1

1 2

2 1

1 2

2 1

1 1

1 1

1 0

1 1

1 1

1 0

1 0

2 2

1 0

1 1

10 10 REC IPIENT ID CODE/NAME AD Lbc/R LA LAJR 4'&

02 NRC PDR 08 OPERA LIC BR 10 QAB 12 STRUC ENG BR 15 REAC SYS'BR 17 CORE PERP BR 19 CONTAIN SYS, 21 PONER SYS BR 26 ACCDNT ANLYS 28 RAD ASMT BR AD FOR ENG AD REAC SAFETY DIRECTOR NRR MPA 04 NSIC 6A-

~ddRF g/8 ww BC.

gE8LA.s+

gag W

Cg COPIES LTTR ENCL 1

0 1

'0 1

1 1

1 1

1 1

1 1

1 1

1 1

1 1

1 1

1 1

0 1

0 1

0 1

0 1

1 AUG P )gjg TOTAL NUMBER OF COPIES REQUIRED:

LTTR P4 ENCL 90

I

Carolina Power & Light Company July 30, 1979 Harold R. Denton, Director Office of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Washington, D.

C.

20555 r@@UIII>m >X<<VII'~~r~W.

SHEARON HARRIS NUCLEAR POWER PLANT, UNIT NOS. 1, 2, 3, AND 4 DOCKET NOS. 50-400, 50-401, 50-402, AND 50-403 SEISMIC MONITORING PROGRAM

Dear Mr. Denton:

Carolina Power

& Light Company (CP&L) is hereby providing in Attachment A

the second quarterly report of the Shearon Harris Nuclear Power Plant (SHNPP)

Seismic Monitoring Program.

This report includes data covering the period April 1, 1979 through June 30, 1979.

In addition, CP&L is providing in Attachment B responses to your staff's questions of July 13, 1979, concerning the SHNPP Seismic Monitoring Program.

RGB/tl Attachments Yours very truly,

$ g err M. A. McDuf ie Senior Vice President Engineering

& Construction qg 0

411 Fayetteville Street o P. O. 8ox 1551 o Raleigh, N. C. 27602 F908 060~4>

~ >

er F

I t

k

/3 gll lg

~ e Attachment A Quarterly Data Report SHNPP Seismic Monitoring Program April 1, 1979 June 30, 1979 Carolina Power

& Light Company has completed another quarter of operation of its seismic monitoring program at the Shearon Harris Nuclear Power Plant (SHNPP) site near New Hill, North Carolina.

During this period a total of 169 cultural events were recorded with an S-P of less than 5

seconds.

No local earthquakes were detected.

Of the 169 events, 150 were confirmed as.being explosions by the responsible companies or agencies.

The remaining 19 events displayed the signature and arrival pattern of previously identified cultural events and all of them occurred during daylight working hours.

Three unconfirmed events were recorded on a weekend or holiday:

Date

~Da GMT at Sta.

4 S-P at Sta.

4 Probable Source 5-28-79 Memorial Day 6-23-79 Saturday 6-23-79 Saturday 15:02:27.1 12:31:01.9 14:21:39.7 3.9 Garner Quarry 4.2 Highway Construction 2.7 Moncure Quarry The event that occurred on Memorial Day displays the signature and arrival pattern of explosions that have previously been confirmed as having come from a stone quarry near Garner, North Carolina.

This day was a normal work day for many businesses in the construction industry.

Two other events were recorded that day that were later confirmed as being explosions one from a construction site and another from a stone quarry near Knightdale, North Carolina.

To date, more than 40 c'onfirmed explosions have been recorded from the Garner Quarry.

e The other two events were both recorded on Saturday, June 23, 1979.

The first event displays the signature and ar'rival pattern 'of explosions that have previously been recorded and confirmed from highway construction which is currently in progress south of Raleigh, North Carolina.

The second event displays the same characteristics of,similarity for events originating from a stone quarry near Moncure, North Carolina.

Xn addition, the seismic event from Moncure also displays an air wave that follows the p-wave arrivals by about 52 seconds, which is indicative of an explosive source at the surface.

To date, more than 85 con-firmed explosions have been recorded from highway construction south of Raleigh, and more than 120 from the Moncure Quarry.

The occurrence of these two events on a Saturday is not surprising since that day is also a work day for many quarry and construction companies.

N

~ ~

S 1

~ ~

l1 ATTACHMENT B

RESPONSE

TO QUESTIONS FROM FIRST QUARTERLY REPORT ON SHNPP SEISMIC MONITORING PROGKQf Who are the personnel who set up the seismic network, analyze the records, maintain the instruments, and write the data reports?

Is there a seismology consultant who reviews the analyst's work'

Response

The seismic monitoring network at the Shearon Harris Nuclear Power Plant was installed and implemented by Carolina Power 6

Light Company (CP&L) personnel.

These same personnel maintain and operate the equipment, as well as write the quarterly reports.

They operated the Brunswick Steam Electric Plant's seismic monitoring program from May 1976 to January 1978 and have, therefore, been operating CPEL's system for more than three years.

Their work is reviewed by the company's seismological consultant, Dr. Shelton S. Alexander, of Penn State University.

Include several sample records.

Identify the cultural events and state those signal characteristics used to identify cultural events.

Identify teleseismic events on the records.

Calculate magnitudes of several teleseismic events recorded at the network to confirm the network's response.

P

~ ~

I

Response

A sample record is included for three different sources of cultural events.

Two of these are explosions from quarries and the third is an explosion from a construction site.

All three were confirmed as being explosions.

Also included are copies of three unconfirmed events with signal character-istics similar to each respective confirmed example.

These characteristics constitute a distinctive event signature=and include the arrival pattern, wave form, frequency content and amplitude of the signal.

Copies of five recorded teleseisms have also been included.

The magnitude of each event has been calculated and compared with the magnitude reported by the National Earthquake Information Service (NEIS) in the following table:

Date I

sl 3-11-79 3-14-79 4-2-79 4-9-79 5-20-79

," Origin Time 12:16:19.0 12:01:25.1 3:46:08.6 Location N.~ Colombia

Guerrero, Mexico

Oaxaca, Mexico 14:29:08.9 Nicaragua 19:37:45.8 N. Chile NEIS 5.50 5.50 5.00 5.00 5.60 CPSL 5.65 5.62 5.17 5.28 5.75 A'epth 26 150 26 60 24 60 23 33 58 33 The CP&L magnitudes were calculated using the standard equation which is used by the NEIS:

M

= Log + Q + Station Correction A

T

S' IC C'I 1,

Where:

M is body wave magnitude Q is taken from standard tables according to event distance and depth A is station Amplitude in microns T is signal period in seconds A station correction has not been established for the SHNPP stations and was not applied to the CP&L magnitude calculations.

What is your explanation for the lack of earthquakes near the plant site during the first eighteen months of network operations?

Response

The seismicity of eastern North Carolina is known to be relatively low.

The area being addressed by this study is incorporated within a radius of approximately 40 kilometers from the plant site.

The lack of earthquake activity within this limited area of interest could be reasonably anticipated and there should be no special significance attached to the fact that there has been no seismic ac'tivity in the plant site area during a relatively short monitoring period.

f

~

~

P

'll I

t '

t E

I F

KEY,TO ATTACHED SEISNIC DATA Develocorder Screen Display Trace Sequence High Gain Station:1 Low Gain Station 1

High Gain Station 2

Low Gain Station 2

High Gain Station 3

Low Gain Station 3

High Gain Station 4

Low Gain Station 4

High Gain Station 4N Low Gain Station 4N High Gain Station 4E Low Gain Station 4E Develocorder Screen 0 eratin Ma nifications Station High Low High Low High Low High Low High Low High Low 1

2 2

3 3

4 4

4N 4N 4E 4E 134,000 7,000 213,000 7,000 67,000 7,000 169,000 7,000 34,000 7,000 34,000 7,000

+All magnifications at~ 1 Hertz

k 4

5 r

I ~

(UNCONFIRMED)

,:4'. "" -"

""%+

-=

14:21:eo r,.

I

,.rg' r>>r n

.: 4n I

nrnr ~y'r ') '<<'~)k't ~"; ~ cg!II)l'" t<<":,))

r(r rrlrr

.r

)I)( [~ tgllr)ry +Jgq()pJ' 1.,

I.

P, W~

tt) 4 (j '-

f(>>

Qr4 err 'j~, +)fly

.rr~

II<<

'g:I r<<

. '0 n<<q,

. <<<<tbl'<'( Q>>

<<<<<<'~r

~ ',g~+!!'

~

rgb

<<!)

+~

<, + <( ,

'p;>>

gr~

I '<<',.'l'~

+t<<jr'f3j:rp

,'l

. 't r?

n".

*-,"'4,r c

C

~r I

l r<<,~

lr '~l<<r"

.t

<<P <7)

"I;

"'-<<I/ppw+PP mr rI < ". In

(

~ l t

<<l r.

I

,g.l.

l

LOCATION:

MONCURE QUARRY (CONFIRMED)

I

.0 I

DATE:

6-6-79 LOCATION:

LEMON SPRINGS QUARRY l,'UNCONFIRMED) 16:24:10 I

.'iaafI 3kkA5L

4y

~

~

+

+ il1

~ k 1

'I

~ llp('I

DATE:

6-14-79 LOCATION:

LEMON SPRINGS QUARRY (CONFIRMED) 16:22:50

ATE:

6-23-79 L.!

I

, i 4V'h<<

LOCATION:

HIGHWAY CONSTRUCTION (UNCONFIRMED)

-.r.er

~ "

..-h.:.

l

.I

<i

~.<

<< ';-[P

':h),"Q$'l<i I'g g<<if<'

<<<< f)

I 0

0 1

0 0

U 0

0 0

U I

t'-

I 0

I I

t0 0-0 0

Cl' DATE:

7-4-79 LOCATION:

HIGHWAY CONSTRUCTION (CONFIRMED) 0 II 16:0>l:5Q "1'

I I

I U

0 Qh0

9; I

r DATE:

2-11-79 LOCATION:

NORTHERN COLUMBIA 12: 2:10

+pc E

c 3.2:22:20

" t)l ()

if'c I

il

~ -.,~

')

t 3.,

7 j Xc I-I EE(

I.

"I'ic

0I

i I

I 0

c

"(~

4@~(~pf

~

l2:07:10 I

~ ff((:

', W.-i g;;.

, fljt(f 0'I'" 'll (ll~~

g

"(I;=-ill (I,

(I0 fl II p(

'I 4

'I'4'=

~

I LOCATION:

GERRERO, MEXICO I

JU

I'l

$, '"'QO "p'(r0(4j'ap

(

= ":ill.

4 0

lj)

JI,)

,;. /j(

9"'v

~k'L(IIQ=-

t""lfffl), t( I(llll[lll"

, j I

0 4

lJ '>

0 ((0 I

II 0

0 n

0 0

rt 0

0 0

0 0 0 0

0 0

~-(r4,, ~g

~P 0

I I

~ I(4 (I

0' 0

r'O 0

VVI p

U 0

0 I

U 0

('

0 0

f]

I 0

0 rr 0 V I

11

'I I

II, PJ pr'I 0

f 11 0

0

'I 0

(1

':0 il I

1 g

{.1

~ i-0 I

tt r.

.I 4 I')

IJ t

~1 L

\\,

I Z,PCATION:

OAXACA, MEXICO (Page 1 of 2) 0\\

'I

".vt{

Ii 0'I,

~ D

-1.

,J J I

2

'.,- j, A

{I'"){tr(it)f,tf't{/Ay s{( 4(->>

{I{(D{(g(t f

~ JI i

I

'1 3:51: 30 I

t2 1

V I

'1"I

'r.p 1.,('j

, srt 4

v)~ '

%at t

ss hi'g hk is,

! Pgi({ )r,r"(it) (itin

'I-I t!(ppFipitI

!Il(IIIPPVIIt(I' I

0-n D

I 0

(i 0

fl D

0 I

r D

nt

,I I

D 0 I

D i

J L

r>

D J

.oft)a J

I D

L 0

'D

{I

)

.I 0

D,J n

f 0

D it I

{i

~

,o nn

,I I

0 0

o n

UD I

t

{P 0

0 0

{>> '

I o,t r>~>r)~~J) s ~s)JD&Ak(((JDJ)( Drfturks ~~~2>>v(Dtus. ~it rts>>w<) ~snoop p2A-ca ~s gfsr~~ JI12Du( g J2prt Q~a 2'~r ii 0

ln r1 I

J 0

0 I

L r{1 I

0

'D, 0

'I I 0

1 J

'0 n

,0 r

('

I.

0

>> s 0

0 0

,0 II DD n

I J

I" I

u'.'t tf I I tlto

'I

{)

'I

'r

'rt 0

- u

'I 0

J 0

t'0 0

tl I

n

, o

{J r.

I n

J D

/2

'I

0 r

P

DATE:

4-2-79 LOCATION:

OAXACA, MEXICO (Page 2 of 2) 3:51 50 I

0

~ I X

~ tt v

DATE:

4-9-79 LOCATION:

NICARAGUA 14:34:40 X4:34:3O

DAT.. 5-20-79 LOCATION:

NORTHERN CHILE 19:48:10 I

19;48:20 I.

'0 r