ML19289C509
| ML19289C509 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 01/12/1979 |
| From: | Utley E CAROLINA POWER & LIGHT CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| GD-79-116, NUDOCS 7901170214 | |
| Download: ML19289C509 (2) | |
Text
{{#Wiki_filter:. Carolir-Dower & Lignt Company January 12, 1979 FILE: NG-3514($ SERIAL: GD-79-ll6 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation r ited States Nuclear Regulatory Commission n Washington, D. C. 20555 BRUNSWICK STEAM ELECTRIC PLANT, UNIT NOS. 1 AND 2 DOCKET NOS. 50-325PAND 50-324 p LICENSE NOS. DPR-71 AND DPR-62 SEISMIC MONITORING PROGRAM
Dear Mr. Denton:
Since July 1977, the National Oceanic and Atmospheric Administration (NOAA) has been collecting data from the Southport, North Carolina tidal gage station in accordance with the leveling portion of Phase I of Carolina Power & Light Company's " Brunswick Steam Electric Ilant Program for Seismic Monitoring" dated June 10, 1975, revised June 27, 1975. Attached to this letter are five (5) copies of an interpretive report prepared by the National Ocean Survey (NOS) of NOAA based on their data col-lected at Southport, as well as supportive information from tide gaget at other locations. Their conclusion is that the Southport area has been undergoing sub-sidence for several decades at the same general rate as other East Coast sites. This corroborates the results of the seismic monitoring program which also showed no evidence of any anomalous conditions. In light of these conclusions, CP&L requests that the NRC staff authorize termination of the leveling portion of Phase I of the "BSEP Program for Seismic Monitoring" dated June 10, 1975, as revised June 27,1975 (i.e., Appendix A to Amendment No. 3 of License DPR-62). The NRC's authority for taking this action is established in the Facility Operating Licenses, Condition 2.C(3) which states that CP&L would " undertake a program for seismic monitoring for a minimum of two years unless termination is earlier approved by the NRC Staff." It is evident that the original concept of the seismic study would allow for modification to the program as factual information became available. Since the authority to make the requested modification is included in Appendix A to Amendment No. 3, a license amendment is not necessary. g u- .m _ - ~ m_. m 411 Fayetteville Street
- P. O. Box 1551
- Ra!ergh. N. C. 27602 RP@
7 9 0117 0 2li ur= - =a
.Mr. Harold R. Denton, January 12, 1979 As stated in our September 21, 1977 letter, the leveling portion of Phase I could be deleted prior to completion of the two-year period if the staff concurs that the tidal data is not indicative of uplift in the Southport area. Since this is the conclusion reached by the National Ocean Survey, we request that you approve termination of the leveling portion of Phase I of our seismic program and that it be effective as soon as possible. Should you have any questions regarding this request, please contact us. Yours very truly, Et E. E. Utley Senior Vice President Power Supply JAM /mf Attachment cc: Mr. Thomas S. Erwin
e ,f%h., O $T f UNITED STATES DEPARTMENT OF COMMERCE g M.?q(f%pf..e, /; National Oceanic and Atmospheric Administration NATICNAL CCE AN SLAVEY acc s e.M3 acasa C3311/JRH 617-D.Oll7 October 31, 1978 Mr. Gary Forrest CaInlina Power & Light Ctrupany P.O. Box 1551 Raleigh, North Camlina 27602
Dear Mr. Forrest:
The following is a prelinnnary NOS report on sea level trends at Southport, North Camlina, 1933-1978: 1. Historical Infonnation Tidal measurements were made at Ecuthport, North Carolina for 21 years, 1933-1953. Mean sea level values were detennined based on the 1941-1959 National Tidal Datum Epoch. The control station used for simultaneous comparison was Charleston, South Carolina. The plotted curves of nonthly and annual sea level show both Southport and Charleston t: have similar sea level variations, with a slow secular rise in sea leve.; relative to land between 1933-1953 (see Figs. 1 and 2). II. Reinstallation of Southport Tide Gage A tide gage was installed by NOS at Southport, North Carolina in 1977, at the request of the North Carolina Power & Light Ccmpany. To date,10 nonths of tide record have been tabulated and reduced to mean values based on the 1941-1959 National Tidal Datum Epoch through comparison with the control station at Charleston, South Carolirat. Thmugh differential leveling to existing tidal bench marks and tide staff, a connection was unde between the historical tidal series and the latest 1977 infornation (see Table 2). III. Conclusion After comparing the sea level value detennined fmm the 1933-1953 period at Southport with the latest 10 nonths of record in 1977, and taking into account the + 0.1 ft. variability expected from a 10 month tidal series, '.7
2 we find that no significant change in sea level has taken place during the last 25 years. This fact is substantiated by sindlar sea level tmnds observed at C1arleston and other long tenn contml stations along the east coast. Annual sea level curves have been plotted for Boston, Massachusetts; Charleston, South Camlina; and Miand Beach, Florida (see Figs. 3, 4, and 5). The annual sea level tmnd at all thme stations show a grndimi secular rise in sea level relative to land but with a reduced rate of change during mcent years (see Fig.1). Fmm the tidal infornntion available, it is reasonable to assume that sea level changes at Southport over the last 25 years wem generally in the sam direction and magnitude as other east coast stations, such as 01arleston, South Camlina. Sea level changes am influenced by many factors but are chiefly due to the conbinaticx1 of eustatic rise (wrld glacial mlting), and local tectonic mvement (subsidence or emrgence). At this time, them is no conclusive evidence fmm our tidal masuments to show any dramatic tectonic changes occurring at the Southport gage site. Sincerely, hin z. A v Jams R. Hubbard 011ef, Tidal Datum Section Tides and Water Levels Branch Oceanographic Divisicn Enclosures
9-I ? b o O 0- "l ~> l i e v 2 t z! - f s a 1 w-s g N ~ f / W ,s ~ --- r - x W ~ x 1 ~ T F f r l -w 2 l' 'b S-C s i / 3 l g 2 7 L L g f ~ ~ ~ ~ d 1 b b f ~ w l J e J 5 ~ s ~' [ T i 5 i o 3(i I g h k 0 0 g g g y o O w a 7 g 7, d o M Q y g 3 j T 7 o m m J s J J J J 2 f,wQh /L'AACT W 90 memi mo s we
a 05 rwo i.d. isso. - 655 -.=t=r-y <--e$u=.1 mi= t= =u =. =- +.m-m=-.z-rT-- p-- t.- .dy ~-~m = = -- =: :-. = p.~_~^~_~~.~~^'~~~~....l.._..-__--..-_^_~~.._~~.3:',i~-~~J'.~_ ~ ~:- + ~= W'_ _ r'-_-_---------____._--._.._-;_-_-_-...__.__--.=_.1..y-- _ _=__: = - _._ = = =_, -..--- /___...y__..._.,_._ 4- %l*--~.----.--.-~_-'--~-r-'=: ,^^___',.-e.. -. - ~-" 1 ~= T .? --
- L...
- -~
T-~ mmm r. .r ix . _ _._..-_.---_-..m-..-. --- -~ = -N;_ - - -- - j _ _ _-.- --_. -- --- - g.._ - j_,,, _ $ _,A = 3 _1_ - - =:-=~ :.-t 4 o g:- :_. =.=- -- y_ _ -. g _-==== v =: __ _4_ _. g;=3 p--gzy ----- w ;7, -.__.-- y =r. - = c.- m.. -, ___ =~_ _ e -. h _ - *: g g. _._,. ..i- 't - z m cww.wa- - _ t- -- a O.-_ ms - -- -r s- ---a ee. -r-x= r dttnuFi i A -.- l=~ - = -. - - m - =_= A T. -= Q .-+-.& ',^g listSt g,I N x' -.Q - +. _ _4 N.^
- =
--- --b L L,: U .- 2 43 ~Z %w-a ._..-.- _,- + - - .=.e-. e--*..-m. e m 't.i . ;. _:~~~~~ g_ g, a_% = _.. c m-p ;-- ' OEF-b.---- = ?--- :-- I-~j ___g _ . -- gn... _ =.. mf t-fMYM*j N^=iG =:^ _==_m__ o x7 Qf. ':-i= / g - i_1EE_ -.e g .L-- 'ik??
A5vLT
.- m " + ' ' N: .'T"' .a = L: 4 -.= e.-.. v i yME e 9.a.m e um Gv.N C.
~I ,,. : j.., ! t .+'. ' 19 [191,0 l9,2.0 \\90 19,40 19,50 1 60 (9 0 ii. 4 - i. j 90 8.B _ m gw mEnns igs3_,5 OF i SIin LEVEL., (FEGT.) 86 _ ( 19 21-193 ) I i l9 YEDR MENhl6 6F SEQ hENEL. 4 8.0 _ SEA LEVEL CURVE BOST0bt iJ21-1m5 r,y~.d
41 98 St Pt ft C 66 C: 6 0 --..r-I -.-._-_..'.y,... _. _ ,_._..a.. 4 .q +_. 4 H g I -_+ _.a _ _. -. _.,... _ _. - _a. .._ _ y L:_ _. ;._._ L. _m 4... _. -_._-**F..+. e ., a i r g _L. _'.'--.,_-._4__..;. -J... ._.3g -~ ) ) (_ __.,;_.. .a g.~. . )- y. ...r.___.__. .+...n_.L.. g .4_...--...4.r_
- 9.,
g__._+-n...... d , _ g... s (.. t ~ p _. yl. _ _ _. 4 \\.. _ _ p
- ._ y - __ '_..-y_
j _,A .4 g-- ... g.. _4.... _ L._, _ _._.... L,.. _i... _.t . q..._4..... _.. _.,. ...i___. q _.- ..A--..._._ c,-.. y.G 4.....,...-. _ r..__ 4..t. -.......'_....a- _.a.,_.._ y h'. _ e._
- p. g.......-.......
Q 4.. p c._-... . _.. + - g c . c __a,_.-...._. _ _ y.. _._... L_' _....J. v_.._-n._. ._4._ . a. u -3 _..g._.j.._.... _, y _._ _ __:. .\\ . _. _u _.. a ,_ --"_.'g. - t*~g_~.~. D. - - ~ ' ~ D ~h-- ~"~@- L. p ' ry;
- 7. ] ~ ~'Jp'
~~ ' 4 'X_ ' T_Z. s., +_ ._. y _... q..._....m____. p. .. O y. __a s ... _ y_..__.4..%., 4..._.., -3 _ _ j _. p_ -,u _. :. p. _ -.... _..,_ p - _,. Q _.. _ . _. _.I _, ___.e _u_ v. M_ 3 --.._,. _._. 4. d( .._.4_. g.._. p - a p. _._. u.., _. - . _. a ..... g.. _.. _ 4.
- w 4....-_
.y.._. <g p_. _ / u... p e. _ p _ y., .Q )_-.._.,, _ -.' o' _. _,,_].~_~ i _ _. yy.. ,. H 9 L, _. (+.M. s,__
- . _ _. L
_. ~.., _., -_.__.t. l.L1~. I __.' _ D: _ _. + y_ _ _.. - p.L N_4 Q.L . m,._. 7.._._ _. C. _4._._ y._ F...p. g.. _4,. 4. a., 4. -._1. g 4 .y. 9 g _..._...._t_._ O_* J._._-. a _g- .1. "_., O..M_._. #.._... J~. , a+_ T _.g..,_y__- .p 4 1 ll d.[ ' \\~~~~*i- ^ ~ - - ' - -, ". -...,-.e-_e....,.-4_-i... , _.r. - - lJ \\ 4- - - -.'- q - l
- I f,,-g
- i-1 r- -- r
~ a e ._4-my t-+- -- p _p.__L.__._,.. - d Et._- j p-_ g a ..p...,J__,.p 7 a 6 I :._._. 4._.,. 3 (,,, 4 _ -. O - {r--- - _q_,.,_.__,_ .....1._. g,f. e F --.-- W _..-4-. j a N.. l 1 =_ -
== 1 __. a.- M _ f 4-4.+ =g .q-- 8 2_44--(...-._y._Q -{ { g 4 _. T - ---H ,_ +. _.. ?j o _.- , in .M.. _1. _n,._,_t I L. ._..{_,-_ 4 g w q q _ _ gym a_ p q .,. ~. -. + - 4 .,. _.._j. .._ p 4_L 9-p 4.4 _[ i _-_4 ."--,4 -(_ p t + L ...,.s 4- ' ' l J... h.' 4 4. A d, . f_
- _. 2._ _ -
g) _T -_m'- _. t,. r H r-1 -+ _ .m.-.-.__.t... i JMW y.. u__t _.-t1,_. g.m_3 4_._. o i 1 ._4 a._ _7,. -._.. 4,_. .L ___u.. a 6
- y
_,w. -~t m-N J L._4_ + t-4--- U),- _- - - _.__4___.,. i -a c,,,, b. -. ~, } +_-, -l.. - _. H.-. ' M.-4--'J'.;** F i' 1J .,M... q 6+ 4.j. pi d v. i.. 4 -... _4'.; a_..__. a. yp. ._m.. o e_ .-u_._ _y.....__..__._....._.._~... ' _. _.__ _..44. ~ y .. 4 $ aa_ w E., ._.,-_._3_=.a .e. .a 2 ..__4_2._.n.u-...' '1 l .,L....l4 . Ja '4-l j. __-..._4_. .7 _L '_.4._ .p .2 J. _e A_. a.. t. {- .r 4.. _~. J .4_l u r-m? g Q;._ ~,- _, m ,_y y s . 4. 4
- .v.. p. a W -- + -
-~.A -.. ~.1-l.a -, 9 y -._.-. __y ' t l w o- -t r-w o A O o .d-o. O. o. 2 e s &) iO y n &--m V ~
.':i,.:- -i i 1900 1910 1920 19 3 o 1940 195b Iq(,o 1970 i YEARW 14ERES q,0 OF 19 EB-1976 l SEA LEVEL 13 YEAR Ment 1S seaSvet_ f 38 f / 1932-19so i ( g 4) 4 a 3.G, s l 3.H 3E SEA LEVEL CURVE MIAMI BEACH I?.)32-loJ76 Re,ue s . S.0
~ ~ E, N5 a y, a ~_ t s L u ~ f l a f M {* .T# f, I ?, ( ; f' 5 llL fIl Z, .t, ~ l iU m / 5 / D o. M s t S. _ (r r d o 7 l i a 0 3 t r 3 r w 0 a n L. e, S te I p i1 2 3, \\ t s s e o l i o g 4 m g s r t c' p e i c t tt r.i f r I o I t p a 5 /h N o t / c r. o e g m 3 . /# t ws m 6 u i p t 7 s f U/ .,'c 3 [f a L n a c / 0 1 r' n y 7 e t s . 0 s 3 a ts p a p 0 m I 2 ) il b' H i 6 8 2 so n I o 6 9 s 1 3 it [ t a t. t. r f t f s i u S t m au o n o o s i v t p n f H p i l y S i a q E _ t 35o6qu1 031 a L e
- t. C 014 a-33 N.
S L E I I U_ r
- h. M N
I 4155,ss33S L 5. '5 6 L r l A6 l 'n U p A i f s V __ A A U O __ V L L I T t. D I h S T_ i f C p 1 A_ TS V_ I o J P a,CR_ E .Q 8 L t. C 1 E C t S _ f f D ) D I A T d O_ S F e lQ n r. A F 8. s 1 u , D n , i p y
- n. _ k T
C n S n 1 I D h t n I f t w l T s n m. i f w r L a k l7,ti N O r. r S p w _[ w G r r k k _Q-I L N D A . s j, t t U"g w I f n n b $" W C r v R i It h b l_ l r r (s w w o h i. o s i s f a t h s n u r o w. u w. c N a ni N I t h. Q S_ C 3 2 w_3 o 3 ' C h i I L C. r Lt 2 e r t e l, 1 M t "l_e M 't_ta%n%T M a t 5 1 e w a v sA t w s t_ e l
- t. 1 t.
cc 1 dit ig lgd i i m o o 2_33.LSm#D_ 's E 'S p a \\ i ii i cl C t l S E s r l t t, 222 3 6 i e e t a H\\M' L r_ l_ 't_- r i i a n i t o
- r. _
!i9f C l e lg lg c c 3 '1 i y r. l i i i 1_ l_ s I t l i t a i 1_ si I l h h t l s M m O @_)( L E*- ) @I O "' o O _ W J UO O ) ) I ) 3 t I a a
99 %m-a t r b 1 v (t m s e l E~ i &n Co e 4 N 4 Rv 8 mb E E. I C Ma A D D. Mr M E as T M E Oi F i U fe O A C ~. D O O-mA
- IL F
L C o t S cow Ta N E c c Mai 0 I l 4 ll ll l te i a Ts i t D R~ ^ s e Ae w 1 1 Ps 3 Eo 1 Ou l I l .v d tm s W S. a e r b 8 i o L 1 o Uo I t l r L w ~ l r t I A n l 5 4 1 i l l l i T lL a S ci g T
- n. 1 1 6
6 n I A ~ I O T t e t f a n th h H s a 1 i i l n r L l l I 61li l j i O o l l: 9} l{ pI t s t. 5 d. s n g e o w t t h I, 4 it f a t f 1 ad Oi' a s T ts oi R l 2 aS D 3 l ra r b A 't s t t 1 ,Mf ig ( h L" e a . A ( A, t w f H 9 3 h 8 H t l M s 1 r yl t l l l .l II f. t e p pr s h e t g t. w P S f t ha s u o n o L l l's g l a s a s 2 u o t t k q E C r a se L h
- t. h h
O f ig I t. R t t r-H 0 Y S l l8 C i i' i E R S / L U L E Q A L t H. 0, 1 U S b 11 A h 4 L O M V l 8 1 A M A O L 4 D 4 N V /L Q U'. I T H 0 I t. I 9 E f S T 1 D SW 1 4 T A V j l E L 1 P R E Q C E c-S L A C / S I tf h DT D U A O S IT F L F A .Q I A A I L r W r l l R L T k D e E S TN 1 I l E M T m A I A D L I .D / c W T A r 0 k h I L H l' N c i i l l O M I S B I W G W r r L n k A L A L N I R wa D E rg S-t W Og W E T s, A A 'n N L ay I r r O h t n 1 I H 1 ta 0 l l I I l { l ll I l G t r s W. r I o W o o g a L a L r t h t b ht n n r u u o o W. r o W N a N H lI p 2 S. 3 g-1 r i t e l, r, r, e r u 5 h I le w w e a t e l e t w a v e t w c v a a c d S 6 g, S e c c y I d S it ig h o it B h ig d a w w A 2 b g* o e o g t h i s l l t s r t 7 j e e n n n n e r s 7 n 3 y fc h h a a n a M o g ta ig w w t 1 i H ig e e c e i 3 o n, R l 9 q M M M M L i o a g a l 1 S l i rl Ma ) ) ) ) ) ) ) ) ) ) ) ) T a D. 0 2 3 4 5 6 7 S D 0 1 2 ( ( ( ( ( ( ( ( 1 1 1 Nsi ( ( ( >}}