ML19269C584

Forwards Draft Revisions to Fsar,Sent in Response to 790117 Request for Addl Info Re Tornado Missiles.Oversized Drawing Encl

ML19269C584
Person / Time
Site:	Sequoyah
Issue date:	01/25/1979
From:	Gilleland J TENNESSEE VALLEY AUTHORITY
To:	Varga S Office of Nuclear Reactor Regulation
References
NUDOCS 7902060171
Download: ML19269C584 (6)

Text

.

. TENNESSEE VALLEY AUTHCRITY cur c.c:a t Tcv.csscr 37 :ct 500C Chestnut Street Tower II JAN 2 51979 otWMg @COBThW TN 9eos @d3 vh Director of Nuclear Reactor Regulation Attention: Mr. S. A. Varga, Chief Light Water Reactors Branch No. 4 Division of Project Management U.S. Nuclear Regulatory Co= mission Washington, DC 20555

Dear Mr. Varga:

In the Matter of the Application of ) Docket Nos. 50-327 Tennessee Valley Authority ) 50-328 In response to the request for additional information concerning tornado missiles by Harley Silver of your staff during a telephone conversation on January 17, 1979, enclosed are draft revisions to Sequoyah Nuclear Plant Final Safety Analysis Report. This material justifies the TVA position that tornado missile trajectories through the auxiliary building blowout panels at elevation 791.75 feet cannot impact the essential control air compressors on elevation 734 feet.

Very trul:z yours,

• f /

o.u,,a-f.4c(

g

[ .Assistant E. Gilleland Manager of Power Enclosures (5)

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17opoloa(7f +. == ~ .

SNP-53 If. 1.(5) Upper Portion of A5 and All Line k' alls. Reference Figures

1. 2-1 and 1. 2-3.

These valls protect the auxiliary control air co pressors and spent fuel pit from tornado missiles. The redundant

! air co: pressors are separated by approximately 40 feet and are protected f rom horizontal tornado cissiles.

1.(7) A/C Equipment Rooms. Reference Figure 1.2-1.

The train 3 air conditioning equipcent roces on roof eleva-tion 763 are separated by 113 feet. The air conditioning equiptent for the redundant train of equiptent is located on the floor beneath this roof and is laterally separated from the rooms on the roof.

1.(9) Roof Elev. 763. Ref erence Figures 1.2-1 and 1.2-2.

The vital equipment below this roof includes the 125V bat-teries, chargers, and inverters, the 480V transfor=ers and electrical boards, and air conditioning equipment. All of this equipment of dif ferent train assign =ents is separated by reinforced concrete block walls. In the vicinity of the 480V shutdoun board transformer roocs there are eight 4' x 8'

, air intsge openings and fourteen 4' x 4' air exhaust open-y[ q ings in the roof. In the vicinity of each train A air con-f J f - (~~ y c's fy I, j dicioning equipment roos there is a 2' x 6' and a 50" x 50" ventilation opening in the roof. In the area under the Ff "] elevation 763 roof the Class lE conduits and cable tra'/s of 5 *J < different train assignments are laterally separated excepg

1. @U o for five locations. 53

'N t-[S Ey 1.(10) Roof Elev. 778. Reference Figures 1.2-1 and 1.2-2. ,

s , #>

---p L -

The hydrogen recombiner power cabinets are located in the rooms d <, y b - $ under these roofs. The redundant cabinets are separated by

_.} - y " 6j spproxi=ately 8 feet. There are four locations under both t' ',u.1 ,

- ,.c roofs where Class lE conduits and cable trays are not laterally r m: n (.;yC separated.

1 Q C'~ c"

(

'-1~~

)- '

g'l . (ll) Roo f Ele'. . 791.75. Reference Figures 1.2-1 and 1.2-3.

~

y O V s .i

'd 19 The spent fuel pit is located 57 feet beneath this roof. The y 'Q f i- w redcadant auxiliary control air compressors are located under t_hi.s...r_oo.f and are separated by approxiestely 2 6 f e e t . -( Mis-

- ,7 - afa f

$ Q3 T g'tvC c{ - siles entering through the tornado pressure relief panel openings on the east end of the El. 791.75 roof and traveling C

u -t' d '

, in a straight line have only a very small angle of intersec-o J

,J q h. tion with the stored spent fuel u shown on rigure Q3.27-1.

s d, Missiles entering through the tornado pressure relief panel i h#5h3 L openings on the west end of the El 791.75 roof and travel- _,.

2 u.g )' ]  ; ing in a strai;;ht line would not h asog by) intersect any

• L do a  ! essential equiptent. The HEPA filter roon is not essential f j :j$jh $

3- lI 1

for safe shutdoun and is constructed of steel angles and plates. The Component Surge Tank is protected bv the El.

.* w* C ef N-a i 763 reinforced concrete slab (see Figure Q3.27-1) with the C -(

1 NEIA filter enclosure and a 2" steel grating providing

' ' ~

w s/.

Q3. 27- 3 April 12, 1978

w ~2

1. (5) Upper Portion o f A5 and All Line b' alls. Reference Figures 1,2-1 and 1.2-3.

These walls protect the auxiliary control air compressors and spent fuel pit from tornado =issiles. The redundant t air cecpressors are separated by approxi=ately 'O feet and are protected from horizontal tornado cissiles.

1.(7) A/C Equip =ent Rooms. Reference Figure 1.2-1.

The train B air conditioning equipment rocas on roof eleva-tion 763 are separated by 113 feet. The air conditioning i

equip: 't for the redundant train of equiptent is located on the floor beneath this roof and is laterally separated f rom the rooms on the roof.

1. (9) Roo f Elev. 763. Reference Figures 1.2-1 and 1.2-2.

The vital equip =ent below this roof includes the 1257 bat-teries, chargers, and inverters, the 480V transfor:ers and electrical boards, and air conditioning equipment. All of this equip:ent of dif ferent train assign =ents is separated by reinforced concrete block valls. In the vicinity of the 480V shutdown board transformer roocs there are eight 4' x 8' air intake openings and fourteen 4' x4' air exhaust open-9 ' Gy b, q ings in the roof. In the vicinity of each train A air con-ditionin;; equipment room there is a 2' x 6' and a 50" x 50" r-3

'~ y ug.; '

ventilation opening in the roof. In the area under the elevation 763 roof the Class lE conduits and cable trays of

+>u1 1'- -) ]-

5 different train assign =ents are laterally separated except

n r p.<r

for five locations. 53 0s _s Z jE.{ -

g 1.(10) Roof Elev. 778. Reference Figures 1.2-1 and 1.2-2.

t-s .#.>

76 L* -

The hydrogen recombiner pcuer cabinets are located in the rocas jj ' 5 4- S under these roofs. The redundant cabinets are separated by

't~.,-,-,y'T" dj ,r approximately 8 feet. There are four locations under both roofs where Class lE conduits and cable trays are not laterally

-e<

-r '; 3 g .,F, t separated.

1Q C' '

f

.T, ?g' d ' U1.

s (11) Roo f Eles . 791.75. Reference Figures 1.2-1 and 1.2-3.

5 0F g d3 ~~

d g y':' The spent fuel pit is located 57 feet beneath this roof- The yw h redundant auxiliary centrol air compressors are located under

-- J D $ , this, roo,f_and are separated by anproximately 26 f eet._ f ':is-

$ c- 33; [silesenteringthroughthe tornado pressure relief panel f f / crenings en the cast end o f the El. 791. /5 roof and traveling

~u-<g e(j. v C* ,1 in a straight line have only a very small angle of intersec-o 'J tion with the stored spent fuel as shown on Figure 13.27-1.

- ,J g" ff _

' g -g y , '!issiles entering thrcuch the tornado p ressure relief panel

. 9 ej b ,d

, g

, openin;;s on the west e nd o f t h e E l -_

_7_9_1_._7 5_.

_ -_ .r oo f an.d.

_ - _.t._r.a.v.e l-

,_ g' g 2 u _ ' sj j ing in a strai;:ht line vculd not(reasonably) intersect any 8 Ju s essential equirtent. The HEpA filter roca is not essential f j j 'z j h Y # for safe shutdaten and is constructed of s teel angles and

-~1 plates. The Conrenent Surge Tank is ;'rotec ted bv the ~1.

_ . $ >3 w -- - I.

A. IL c) n - c  ?.

- I 763 reinforced concrete slab (sec ?i:;ure Q3. 2 7-1) uit h the

%r '. f p, l HEPA filter enclosure and a 2" steel r.rsting providing H~ - ._) l

\\\

v/ Q3. 2 7- 3 April 12, 1978

ShT-53 b 1. (5) Upper Portion o f A5 and All Line %' alls. Reference Figures

1. 2-1 a nd 1. 2-3.

These valls protect the auxiliary tontrol air compressors and spent fuel pit frem tornado missiles. The redundant

! air cocpressors are separated by approximately 40 feet and are protected from horizontal tornado cissiles.

1.(7) A/C Equip =ent Rooms. Reference Figure 1.2-1.

The train B air conditioning equipment roces on roof eleva-tion 763 are separated by 113 feet. The air conditioning equiptent for the redundant train of equipment is located on the floor beneath this roof and is laterally separated from the rooms on the roof.

1.(9) Roo f Elev. 763. Reference Figures 1.2-1 and 1.2-2.

The tital equip =ent below this roof includes the 125V bat-teries, chargers, and inverters, the 480V transfor=ers and electrical boards, and air conditioning equipment. All of this equip =ent of dif ferent train assignrents is separated by reinforced concrete block walls. In the vicinity of the 480V shutdoten board transforner rocas there are eight 4' x 8'

, air intake openings and fourteen 4' x 4' air exhaust open-

_ ;q ings in the roof. In the vicinity of each train A air con-

_9 _' G y' ditioning equipnent rooc there is a 2' x 6' and a 50" x 50" 4 57" .) . ventilation opening in the roof. In the area under the

,M

• elevatien 763 roo.' the Class lE conduits and cabic trays of

.-+--

5 .>;u 1s -)]e .

different train assignments are laterally separated except V, .t e d .

for five locations. 53 t)-,

Z 3 ~-~ I s 1.(10) Roof Elev. 778. Reference Figures 1.2-1 and 1.2-2.

C ]~~j

-T- I w- The hydrogen recombiner power cabinets are located in the roces j under these roofs. The redundant cabinets are separated by

,_$ $ y.h'3 -( j$ approximately 8 feet. There are four locations under both

-t ~ 7, ~. ew-c T ,.,,. roofs where Class 1E conduits and cable trays are not la terally C separated.

-n 153 yl C' "

t I

h/J U 791.73. Reference Figures 1.2-1 and 1.2-3.

-i h c d ')l. (ll) Roo f Eles .

6 '

d 19 The spent fuel pit is 'ocated 57 feet beneath this rcof. The g L redundant au::iliary ceatrol air compressors are located under r--r '~

~J - J' '

' this roof and are separated bv anoroximatelv 26 feet.]':is-gQ33; #

[silesenteringthroughthetornadopressurereliefpanel f

3 s'tU -? / openings en the cast end of the El. 7?l. 75 reo f and traveling

-u_-t' d,h / in a straight line have only a s ry small an;;1e of intersec-

)

- - o. , .) m g> tion with the stored spent f uel u shown on rigure Q 3. 2 7-1.

Missiles entering through the to r- ado p res sure relie f panel

i

fs c) , -3 '

openings en the west end of the El.. __R. 7 5, ,rc o f an d ,tme l- ,

,.,f, u.y Q'  ;

ing in a straight line would not(~re_asonabije) intersect any I dV s '

essential equiptent. The HEpA filter room is not essential f J }_-2 $ j'. h J3' # f 1,

for safe shutdo"n and is constructed of steel angles and p l a t e <; . The Compenent Sur ;c Tank is Protected bv the El.

s U C a a' s 763 reinforced concrete slab (see Figure Q3.27-1) with the

% Q>- {. c-.fp, IIEEA filter enclosure and a 2" steel r. rating providing

) i j q3. 2 7- 3 \\\ April 12, 1978

% ./

SNP-33 b' 1. (5) Uprer Portion of A5 and All Line 'Jalls. Reference Figures 1.2-1 and 1.2-3.

These : calls p ro tect the auxiliary control air coepressors and spent fuel pit f rom tornado =issiles. The redundant

! air compressors are separated by approximately 40 feet and are protected f rom horizontal tornado missiles.

1. (7) A/C Equipment Roces. Reference Figure 1.2-1.

The train B air conditioning equipcent rocas on roof eleva-tion 753 are separated by 113 feet. The air conditioning equiptent for the redundant train o f equipment is located on the floor beneath this roof and is laterally separated from the rooms on the roof.

1. (9) Roo f Clev. 763. Reference Figures 1.2-1 and 1.2-2.

The vital equiptent below this roof includes the 1:57 bat-teries, chargers, and inverters. the 480V transfor=ers and electrical boards, and air cor..itioning equipment. All of this equip =ent of dif ferent train assign =ents is separated by reinforced concrete block walls. In the vicinity of the 480V shutdoun board transformer roocs there are eight 4' x 8'

, air intake openings and fourteen 4' x4' air exhaust open-y q ings in the roof. In the vicinity of each train A air con-f _3 . '[;-*~~ y' dicioning equipnent roon there is a 2' x 6' and a 50" x 50" 4 g .i ,

ventilation opening in the roo f. In the area under the

,~d '7 elevation 763 roo f the Class IE conduits and cable trays of 5 i L -J 7 different train assign =ents are laterally separated except

1. @ 3.fd'

.g t- s

~

for five locations. 53 Q )-~}.E g 1.(10) Roof Elev. 778. Reference Figures 1.2-1 and 1.2-2.

76

+--

L W -

The hydrogen recombiner power cabinets are located in the rocas j 4

.b- $ under these roofs. The redundant cabinets are separated by J 0 6j approxicately 8 feet. There are four locations under both

't ~ 7_<_,..,t

~e'.-

,n ,y 0 roofs where Class 1E cenduits and cable trays are not la terally f': - yCp

• separated.

-r a

g -q~r-a

(

)/'d Gl. (ll) Roo f Elev. 791.73. Reference Figures 1.2-1 and 1.2-3.

-" ' OY q d3 5 g The spent fuel pit is located 57 feet beneath this roof. rne y 'w' f,2l-'O "

redundant auxiliary control air compressors are located under

,.7 t_ woroximately 2_6 _ fee _t g {]a >d ?s e d] b"is-

[s. iles h i s. . _r o.o. f a n. the

.d.._a..r_

tornadoe pressure s.e_p a r.a._t y entering through relief panel e

f h<g ' dt v / openings on the cast end of the El. 791.75 roof and traveling l in a strai;;ht line have only a very small angle of intersec-

-o_ud ,.

tion with the stored spent fuel n shoen en rigure Q3.27-1.

.T C Missiles entering through the tornado pressure relief panel

k [ " b b 3 openings en the vest end of the El. 7 31. 75 roo f and travel-

- *u dyv , }' v V' ,

-  ; ing in a strainht line would not(_ reasonably) intersect any 4 s - l essential equip =ent. The HEPA filter room is not essential f j_.$$"y i ', j U N ' f I

for sa fe shutdoun and is constructed of steel angics and plates. The Carpenent Surge Tank is protected b" :Sc El.

.L Ca>- l 763 reinforced concrete slab (see Figure Q3.27-1) vith the h f h([) !

! HEPA filter enclosure and a 2" steel crating providin;;

n_

%/

/ Q3. 27- 3 h\ April 12, 1978

SNF-53

. l.(5) Upper Portion of A5 and All Line Walls.' Reference Figures

1. 2-1 a nd 1. 2-3.

These ' calls protect the auxiliary control air corpressors and spent fuel pit from tornado cissiles. The redundant air compressors are separated by approximately 40 feet and are protected from hori: ental tornado cissiles.

1.(7) A/C Equip =ent Roccs. Reference Figure 1.2-1.

The train 3 air conditioning equipcent races en roof eleva-tion 763 are separated by 113 feet. The air conditioning i

equiptent for the redundant train of equiptent is located on the floor beneath this roof and is laterally separated from the rooms on the roof.

1.(9) Rcof Elev. 763. Reference Figures 1.2-1 and 1.2-2.

The vital equip =ent belev this roof includes the 125V bat-teries, chargers, and inverters, the 480V transfor:ers and electrical boards, and air conditioning equipment. All of this equipaent of dif ferent train assignments is separated by reinforced concrete block valls. In the vicinity of the 430V shutdoun board trancformer rooms there are eight 4' x 8'

, air intake openings and fourteen 4' x 4' air exhaust open-ings in the roof.

- _9 -G 'j, .;yq In the vicinity of each train A air con-f c1 v T' Q ,'

ditionin:; equipnent room there is a 2' x 6' and a 50" x 50" ventilation opening in the roof. In the area under the

,'~ .:.! ' " ] elevation 763 roof the Class lE conduits and cable trays of

&2 5 l ' -J 3 *J p e different train assign =ents are laterally separated except

• e .r :' .ct' for five locations. 53

-a a

Q5s- 1. E y 1.(10) Roof Elev. 778. Reference Figures 1.2-1 and 1.2-2.

Pg L -

The hydrogen recombiner power cabinets are located in the rooms j4'N$ under these roofs. The redundant cabinets re separated by J $ y 4(j approxicately 3 feet. There are four locations under both

-t-~ ' 0, _e< .,,. -c_ T.,r.. roofs where Class lE conduits and cable trays are not laterally

.f : 3 y r p" separated.

?5 C

Z / I'd U 791.75. Reference Figures 1.2-1 and 1.2-3.

--i OY c )l . (ll) Roo f Elev.

-' g NL s r

'd O The spent fuel pit is located 57 feet beneath this roof.

redundant cuniliary control '*- - essors are located under The O 21

,7'-a,.'J a

t. h. i s. . _r o o.f _ a n. .d..a..r_ e. . ..s.e.p ar.a._t.e_d___o v _a. p o. .r_o.nr_a._.t__e l v. _. 2 6_f e e t . ] "is-p- p' d -:" f'siles entering through the tornado pressure relief panel

+

f* j g ;aC

/ crenings on the east end of the El. 7?l.75 roof 2nd traveling

' u -C' d j ,1 in a straight line have only a icry scall angle of intersec-

-o; -JD .. ,2

-9 ,, tion with the stored spent fuel as sho.n on Figure Q3.27-1.

, Missiles entering through the to-. ado pressure relief panel iu b  ; openint;s en the vest end cf the E,1 ,__'d ._75_. roof and.,t g e_l-w ~ = .

na anv

--+--

dV 2'v i

.n 2 stra cht line veuta no t( r en no._ nab. - . . el

. - in te rsec t essential ewircent. The HEPA filte, - -- roon is not e s s e n *_ 'lal f jj',jUN'l for safe shutdoun and is constructed of steel ang1cs and

_.2 ') 3 The Conronent Sur ;c T nk is prote-ted by the F.1.

.' ?. C ,.I' _.,'J-l plates.

3 , a i 763 reinforced concrete slab (see ri;ure Q3.27-1) rith the

@r , $ {1] ,

IIEFA filter enclosure and a 2" steel crating providing

.---~~-._.)

k_/

/ Q 3. 2 7-- 3 h\ April 12, 1978

. .