ML20117P443

Describes Proposed Enhancement to Portion of Flood Protection Features in FSAR Section 24.55.Minor Slope Variation Proposed to Maximize Available Width of Rocks Road Which Runs Parallel to Revetment Between Slope Tow & Marsh

ML20117P443
Person / Time
Site:	Seabrook
Issue date:	06/03/1985
From:	Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE
To:	Knighton G Office of Nuclear Reactor Regulation
References
SBN-807, NUDOCS 8506060343
Download: ML20117P443 (6)

Text

fI SEABROOK' STATION Engineering Office PENHI June 3, 1985 SBN-807 Pub 5c Service of h 6 T.F. B7.1.2 NEW HAMPSHIRE YANKEE DIVISION United States Nuclear Regulatory Commission Washington, DC 20555

' Attention:

Mr. George W. Knighton, Chief Licensing Branch No. 3 Division of Licensing

References:

(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 adn 50-444 (b) Seabrook Station FSAR Section 2.4.5.5,

" Protective Structures"

Subject:

Seabrook Station Flood Protection Features Enhancement

Dear Sir:

The purpose of this letter is to describe a proposed enhancement to a portion of the Seabrook Station Flood Protection Features. This enhancement entails changing the slope of the northeast fill revetment. This slope is presently defined in Section 2.4.5.5 of the FSAR as varying from 1 on 1.9 to 1 on 3.4.

The modification will be to change the slope to a nominal slope of 1 on 2.5 that varies from 1 on 1.9 to 1 on 2.5.

~ The purpose for this minor slope variation is to maximize the available width of Rocks Road which runs parallel to the revetment between the tow of the slope and the marsh. All other design aspects of the northeast fill revetment would remain unchanged. This modification necessitates emendation of the FSAR and we have attached those annotated FSAR pages, for your. review.

Per present design, Rocks Road would have a width of about 8 feet along the approximate 600 foot northeast revetment length. This charge in slope would allow us to provide a wider Rocks Road - to about 12 feet in width along approximately 400 feet of revetment - limiting the length of the narrow 8 foot roadway. This enhancement will provide better access for normal and emergency use along Rocks Road than that afforded by the present design.

We believe this minor slope adjustment will have no adverse effects on the performance of the northeast revetment, and we are therefore requesting your approval of this enhancement to the Flood Protection Features described herein. To assure smooth and efficient incorporation of the Flood Protection Feature's enhancement into our overall scheduling and construction activities, a response to this request would be most appreciated by June 28, 1985.

I g6% Bas!Bi8%3 a

i Seabrook Station Construction Field Office. P.O. Box 700 Seabrook, NH 03874

[~

1 1

LUAited Stctes ~Nuclcir Reguletcry Cosmicaicn Pagn 2

~

.c

.Attentient; Mr.~Georgn W. Knighten i

We will amend the FSAR per the attached annotated pages to. reflect the enhancements which will be made to the northeast revetment af ter NRC approval.

Should you or your staff have any concerns regarding this matter during your evaluation, please do not hesitate to contact us.

Very truly yours, ohn DeVincentis, Director Engineering and Licensing Attachments cc:

Atomic Safety and Licensing Board Service List

SB 1 & 2 Amendment 53 FSAR August 1984 h he design f the east s pe fill reve ment consis of compact tunnel cu tt ings ith a slope

1. on 3 (des *gna ted Reve nt B, Figu 2.4-20).

For er sion protecti the fill r etment wil e faced wit stone as d ined[

' 98 in T le 2.4-13 an on Figure 2.

23.

The no heast fill vetment is ne i

as that for he east slop with th'c ex otion that t e slope var

• s (saom 1 on 1.9 d l' on 3.4. { Wave action against the fill revetments during peak PMil surge would be minimal and would have no adverse impact on any plant safety-related structures, systems, or components.

2.4.6 Probable Maximum Tsunami Flooding Tsunami activity related to underwater geoseismic activity is extremely rare on the U.S. Atlantic coastline. The only recorded activity on the northeastern U.S. coast resulted from the Grand Banks Earthquake of 1929. Although localized flood damage was experienced in the south end of Newfoundland, the southward propagstion of the tsunami was insignificant.

F A

0 9A C U C 0 0 0 4>

30

$Be3*~m3m 4N4y*gj k0H C 0 3 4A O>

CH C uOw dAOHH

&

• 1 ' u ~ 3l t 88**d8eoS 3 * # ; 3: BB&a oue i eu-=

8oB"."8m"a mmoN9% 099 p >

C 4 C4 amooouuo3 82"2B**B4 oC eoC 04, 40

-P>

O4 >t N

h C k N $ 8 I!

8sD#

8"Ca N Ot O mAH O 4

C CUNC N

N C-N 4

40M 0 04M C

C H

d W = O M M W W

&W 4 Ou4 0 owm dCO> >

4NO O M d

9 M C M U D m4 C 0 0 04 De H ute*3CB 0

C

.t wa

.u m~

n emg

-.me

&E&N85N

-))

" ; t.C 8 C.01 ooeaw CO U k h

3 OdH E

/

2.4-33 d U

7

]

4 L

t.

g!-

EmEP.a 7

I

(

J h

L

>cEa eE 2

YoY,-

'1

/

k 2

1

(

[

C E

~

P

, o,,,

T O

N L

E S

M P

T A

c" p

E R

V P

2 E

I R

R A(

j c,

.R R e P

s H

CE Fu gT M g AU gVP 8

l' C

X T'

3 5

g M G

+

NLD I

L#

AB E"

T UFi J 2 S

LL AL 1

' j CA h

i TW Lg G I

i L

RA S

OG RP EE E

RTD VS 6

R NLB U

O T

C C

)

L U P L

G E

G R U S

M

%D T

D TN G

A S

L L

L (.

QB WB L

U F R AT O

WF E

5 A

SV L

G0 6

LA N2 AW N

W I L O

E ST IAP MG W

E lR EO ND T

T T

t L

E A C AB E

RT W

2 E

2 UF'B O

7 7

/

C 1

I J

DB 4

5 T

G

+

N U D

1 I

S N

A R

L M u

m RN E

h L

E O

I O

T P RG P B O

m N O 2

TD L

=

Nt c

E S E

OB l

M C

P l

T A

E E

l G

V R

T gBD E

I O

P R R N

L B

N

(

g> m 3$gA6z al5 gm Om OO

>z< Om z I)g]I'D 2

n nm gg z$ >h i$E>r n

my OO*(

Oz'Cz tn'Pm n

l 0i c> m4 z>rNg o

D-2z n

l1 l

I l

2OC m = >

a e

===.

a. '

gt +

N DD u

L-

.j. [ =.-

==

+

==-

( Ls ee-eniu sm m m e

PF/1Tutut B'.TYP Spcu o stapt

( ***f m e

y

.n

__q M

I l

l sv

.~;

9.G NS 948 96TA WIO39 4 29 d SECTsOed 1002_l B

. _..... ~

i l.

472 6

I I

.ee.,..

<=

.cottse 6

l s ees I

. w,.

I esee m

'x chv/

ervst.eur a s

MOM

'N%m_ _

J 3

7,m. c.-._J.

(EXTRACTED FROM 9763-F

Amendment 53 Augrst 1984

+

TA.T.'l=

F c--

m,.

In h>

bj *N,J

.c%

E>

gp.

l_,

n

~ w

-\\

<f s I. 'M l 1

-p-

""~

f

,.;,,.j::..;,.}..u ;..,1-$,4 T/.'i.*"

Maa

=

3

. ~.,

f~

7 etevw.

9'

. R'".

l. wm.,.

e,,

/

\\

i

.,m u w,.. u m.e.oc..

14y

. w.s.s.

,.,, L

.',;f::tA*n,J M/*.?#

(.l

.c.

E5M,.,1,.. i

\\

p.= = a..

7, m., p es

=c

• ~

m

.- m a,, )

aa<s.-

w-RivtTM U.

L CT ON

.ioes e sw n

.m. c6.

e

-T_T _., mT....

t --

..m g 3.%

,' eg _. _. _...a.._.

,W6l,i.5.t.Co

-W6.. ).,1.

' I m.-

.. ~

" " " "' "'l'"

..u w

(v w.

. -,. - ~

-1 j m 3,g.. g g:

s,,.

. =.

,e

~

bv::.,.% /Lt.z:

. n::::.~.:=':~ K

_~

sg g--- -- - /......~ ' ' " ~. ~ "

m-4+- fx

=a,...

' v5 v>

c....,_.

.~

1, i.

p!

y t

.s re f.;.e.-

.- u ~........... 2 w.m....

m e. -......,. n

-+

=>

9 9

j t

-,2 %...e_%.ye,._15, ACY.ttur,N.T

. Tvp.....ECT Q a

~ f..,

s m

.I 4%

I,q% t~ --n:::C v'.f

's

"'"t*"'**

'*.S*

2"";

.tw, ;. _L,.._...

p%.9(h s

xww I

i t

2 e

m-- ~:;

l

. %.m J ts y m

• T. ;~..w,,f=.n..

g..,,

m

(= =

IN, o

• -.am - W.

y'd;> 4 -

. ::p.,7 2*re. eq t

• g,

i. w 1

4

..u1

,s nz a. d a..

. cin

.,3 sse ou.

j...

t(

rp@s,

.w m.y.

r.

I

\\%\\ /

\\(. T l

[i,, h.tm3,' ~

g y.

j i

1

, e,%,,(,ft,:.* '= n"=

m

4. -

. g g ~.?

l; I "W

'. h,,/

.m.

~

s, j

y

- ~ {g*

T J

CT..Gl.

~

s'

.. m, p I

_y

.,.*"':'t M '***'

!}

I

\\_e n

\\ % [.4#

o..e.o. L. r.s... n.t=.ar.D* ", L*':fr '

l

\\ gf 3

"***8 q

m.

g\\ (g g gvE..NT.r. _fvo it Tcq

..p

.e_

i

,1 ~.J 3

y

.l I

s'W

% h* o'i ]t!

l

]

l j

i.h_m *=MQ@c

!]

Aho Available On pi.-,....

~iv-

.=

VApatm Cad

[y

/

i T1 4,,_.y / m.

Es,y m.m e

l m.-M;p m@s.m..->

APERTURE

=:=

I F E E e= =._.

CARD i

1

.i

.I

3. '

Jf 101023)

PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE TYPICAL SECTIONS I

SEABROOK STATION - UNITS 1 & 2 REVETMENT A. B & C l

FINAL SAFETY ANALYSIS REPORT l

FIGURE 2.4-23

VJ

-e, J,3 William S. Jordan, III Donald E. Chick

-Diane Curran.

Town Manager Harmon, Weiss & Jordan Town of Exeter 20001 S.' Street, N.W.

-10 Front Street Suite'430 Exeter, lui. 03833

. Washington, D.C.

20009

- Brentwood Board of Selectmen Robert G. Perlis RED Dalton Road Office of the Executive Legal Director-Brentwood, NH '03833

-U.S.l Nuclear Regulatory Commission Washington,' DC 20555 Richard E.- Sullivan, Mayor City Hall Robert A.LBackus, Esquire -

-Newburyport, MA 01950 116 Lowell Street lP.O. Box 516 Calvin A. Canney :

Manc hester,. NH ' 03105 City Manager City Hall Philip Ahrens, Esquire 126 Daniel Street

Assistant Attorney General Portsmouth, NH 03801

' Augusta, ME- 04333 Dana Bisbee, Esquire Mr. John. B. Tanzer Assistant Attorney General Designated -Representative of Office of the Attorney General the-Town 'of Hampton-208 State House Annex 5 Morningside Drive Concord, NH 03301 Hampton, NH 03842 Anne Verge, Chairperson Roberta C. Pevear Board of Selectmen

Designated Representative of Town Hall the Town of Hampton Falls South Hampton, NH 03827 Drinkwater Road Hampton Falls, NH 03844 Patrick J. McKeon Selectmen's Office Mrs. Sandra Gavutis 10 Central Road Designated Representative of Rye, NH 03870 the Town of Kensington i

RFD 1 Carole F. Kagan, Esquire i~

- East Kingston, NH 03827 Atomic Safety and Licensing Board Panel U.S. Nuclear Regulatory Commission Jo Ann Shotwell, Esquire Washington, DC 20555 Assistant Attorney General

(~

Environmental Protection Bureau Mr. Angi Machiros E

Department of the Attorney General Chairman of the Board of Selectmen

~0ne Ashburton Place, 19th Floor Town -of Newbury

Boston, MA '02108 Newbury, MA 01950 l.

^

Senator Gordon J. Humphrey Town Manager's of'fice l

RU.S. Senate Town Hall - Friend Street l

Washington,' DC 20510 Amesbury, MA 01913 l~

_(ATTN: Tom Burack)

Senator Gorden J. Humphrey i

i.

Diana P. Randall 1 Pillsbury Screet

[

70 Collins Street Concord, NH 03301 l-Seabrook,.NH 03874 (ATIN: ' Herb Boynton)

I:

!=

l k'