ML20024B294

Preliminary Generic Plant Comparison

ML20024B294
Person / Time
Site:	Crane
Issue date:	07/06/1983
From:	ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY
To:
References
TASK-*, TASK-06, TASK-07, TASK-6, TASK-7, TASK-GB GPU-2425, IEB-79-06, IEB-79-6, NUDOCS 8307080291
Download: ML20024B294 (19)

Text

_ __

9,,

,.h.,..-..._......_-.

1/UU spo Mzg i

..]_.

(,j'/ C.c rower systems To 2 h..l.In 3

t, rem =

, p; es, n..,.. c,......, im

• tr/.; Prc.mt h.:. I6:02

. :!{d vt.ncsv. C(,nnce icut c;:05

./

r-ei

[ ' N1 yf,{POV/ER i

- g

_ :# SYSTEMS

/,).?

.%v/s}/

i j

YQ'//,'

N'i.y/d.4 W & *.%

m

-f y

s w%x (.4*'

' fr

![

.F P

Y p

7 Enclosure (1) provides generic design differences bet >:een a typical C-E Ve are providing operating plant and SW Three Mile Island Unit 2 (T::1).

?

this esterial as background, kncwing of your need to res;cnd to regulatory L

inquiries. Since this infor: ation is generic and was gathered fre. services 1

at Windscr we recc:::end that you check the specific validity with respect 1

to your unit.

{'

Part a of Enc 1csure (1) provides a listing of design features of C-E oper-ating plants which w:uld tend to citigste an event similar to the 1. css of Feedwater Event which occurred at TMI.' Such design features in ccnjunction with improved o:erating and emergency procccurcs will give c:nfidence that p.

an incident similar to t*:e TM! event has a very Icw :rotability of cccurrence

. F at a C-E d:sigr.ac c: crating unit.

C.-E will c:ntint.2 to evale:te ptr.inent

E A

design featurcs and pro ptly rec ::.end any. design ecdifications a'nd/or procedural changes which ennance c;erating plant safety.

)-

p Part b of Enclosure (1) provides systen descriptions uhich form the basis' r

Part c of Enclosure (1) crovides

[.

for the cenclusiens stated in Part a.

a C-E cngin:ering evaluatien of the sequence'of events which would transpire t.

if an event simiitr tn the TMI 1.:ss cf Feec: ter incident were to cccur on

[

a C-E operating plant. Part c of Enclosure (1) is a generic descriptien of r,

expected C-E plant response to avents.similar to these experienced at TMI.

?.

Co.bustion Er.ginccrir.g studs retdy to assist you in ressending to I.E. Bul-1ctin 79-0G. If you should require such assistance fres C-E. please contact r

me.

t h

I

~

Sincerely.

i.

C If

/c k i

/

V..:.th c l'anagte, Engineerin-) Services t

P',.'K:nts l

l 8307080291 830706 h

PDR ADOCK 05000289 P

HOL

..4...._._..._

~.

l

.m.

i.cl o.

f"41

. IQ C

ENCt.05URE(1)

_-E/Bf.1 c

~

PRE 1.ll'.1:a2.Y GE!:IP.!C PLA*:7 CC:7.*P.!S0?[

e W

i l

The infer:ation presented in this enc 1csure is based on prelictinary i

!j information cencerning the nuclear incident at Three Mile Island f

f

' /

The results stated in this enclosure t

t j

Nucicar Power Plant i:ueber 2.

c C-E engineering judgement of events which transpired t

are based on The information and esterial discussed >and durtrig. the accide'nt.

presented by C-E with respect to the Three Mile Island Nuclear Pcwe P

f l

Plant d: sign has been obtained frem the Preliminary and Final Sa ety E

Analysis reports and personal knewledge. '

p.a t

s E

l e

i.

g 1

tj j

x L

g-

[.

,.y.

b

....i.

(

L v

,y

.,-w I.

..l',,

o pl

..n il l!

=

'GEllCRIC DESIGft FEATURE 5 UllICH GIFFER DETifEEN C-E AND Tit!-2 CO:: TENT

)

i I

t.

DESIGIIFi'ATURE s

The combination of a low steam generator watcr

~

~

)

.a) C-E p' ants have a low steam generator water level RPS trigil '

trip and higher steam dump capacity prevent l

Tc-a loss of fced ater, Ol'J plants trip on high

- significant primary system pressure excursions en The Dati trip signal also lifts '-

ri

ary sysica pressure.

the pressurizer relief valves.

~

C-E plants.

b).C-E pl.:nts have 40% steam duinp/ turbine 1[ypass capacity.

ei S5:!. plants have 15% steam dump / turbine liypass capacity.

i

'j There is more time availabic to estabilsh c.ccrgent C-2 s*.:am generators have a larger secondary stater inventory

• feedsater af ter loss of main feedester in the C-E th.tn the lill steam generators.

system and less likelihood of lif ting a primary relief valve.

..t Only 2(1-25% of RCS fluid is needed to cover C-E i

. l C-E core cicvation is relatively lower in the tiSSS.

A significant fraction of the Tiil RCS fluid, once core vs 40-45% of RCS fluid for I;ll,

~ '~

Izjout thar. lill core.

C-E st:am generator elevation does not form a cold Icg there is void in the RCS, will collect.in the

~

t i Icep scal.

steam generator / cold Icg loop seal.

?

The higher elevations result in a better potential C-E steam generator elevation.is higher 'than Tiil steam to initiate and maintain natural circulation.

n

~

generator.

~~"

U-tube steam generator design allows reflux corden C-E U-tube steam generator design vs,TH[once through 7'sation of RCS fluid in hot Icg vs only cold Icg return of condensed RCS fluid for OISG desinn.

straignt tbbe (OTSG) design.:

• U-tube steam generator also allows more uater invc tory.

l.

.1here is more potential for water retention in the 11111 'stca:n generators have score primary..if de water

' ~

1111'SGs uith conscr;uent unavailability of the state f

j'.

Iinventory than the C-E stcan generators.

to cool the core.

-l s

A surge line lool seal allows uater or (teo-phase i

.

• The TTil design has a loop seal in the pressurf rer fluid retention in the pressuri:cr with t.:e prf r The C-E design.has no loop scal.

system volded. This will produce an indication h

sure.e line.

the reactor vessci is not voided based on a false pressurizer 1cvel Indication. The C-E systea uithout the surseline loop seal is Icss p

su-;ceptibic to this falte indicatien.

-v~$#

n

.w,, w

~

),'..... w,

~.n..,.-.

.~v-i t.

l

1;

.lf

+

e.. n.H i o.... i. e e t......t.

j i

draining the pressurizer uhen the hot icg is'voidec l:i The increased clevttien increases the likelihos c' Tt:c C-E pressurizer is at a higher elc0Nions than the 9.

TlIl pressurizer.

10., The C-E P. PSI shutoff head is lower kli$n {he TMI IIPSI The lower shutoff head will not result in liftir?g if the pressurizer relief or safety vlaves if the liPSI ji

,i shutoff head.

, pumps are lef t on.

4 f

e l

~ -.

't

.t t

f t

\\_

1

,e e'

'e 3

.l

't

- I i

~

~

r 3,

l

l. *W ',

1 1

i e

ee-r i

O e

p

{

O O

e e

a ? " 7 ? '-

- - 4 g M =* a a re i -

wy.

y

,-,/-

FT'"y e.[,

F 5- - -a dir ;

"1 P

8 4

G.B

')'

}g J.

l E

ll ::.:

. -... - -. - w..-

?.---

-~.~.. -. -

~-

','.l h

.l k

M.

1 -...

'6 r.

g ia%l 1

..d l

[

t..... g'l.... l....., l 1

' Ib,l

. f g,

of.

s g.;

I

....l!_llr.... j i....,'.

2 :.-

==

p.

11

-- _' ~/l

1. -

,.. W.

.. 2-o-

. a..a..

=

M *:': r.;.; :: "

Q c

h 9

t.

n

• /

&J W

~

i

= U

==

.4 -

cc:c

=

E e

s A

o g

=

?

(.

.t' g

v o

JA

l. {_

tb s.

g.. t.

3.*

~

.a

.c t

Ps :

• t. :

t.

-.2 ; gu

.rtt L

e 3

I.:

==

:. :. 2_.. :.

_ v.

e e

---.:...3-n..a-a

... m...%,S.,

n

}hij

,i 353 i A

.f *

- -).r i*

(7 r,

'C) UJ a..

s l

I) v l

l!l I

l' t

t t.

...g.

t.

4 c

.+

n

g... -

gt I

m.

,, G

e..

f

=

=

?'

,f,,.,-

4

=

t t

,m v

t 4

-A

. e--

E u

e,. ~. i w". //

T.

1+~s.,i.

e=-

===-= ::

., -. =

i u.

- _).

: ::S nf F.

~

8

\\ < L--e.,J.J

. c x. -. ~ ~

-, t i

g n---- pa. 4./., 4,

n..=,

(

~

t o

w g.

t

%.o e

.n

.a. _.

JlJ. g m pi l9I il V r, I

e.

1 g

. e s.s

.a. - 3. -3., '

e. d.. I..

... Cn..- d- ).!,i I

ll1 f ia

., - ~

o I

76 7,

b I. E r - a'8"*

I. @*

= 2 a

n v ' L.r:.,j N.. J.,mW,e.ce:.:: : ::s r

i:.

r.

24= 5 23E53 Ti:?.$D r.

i

&, N.M.. e

.t u..a.

2 m:1 f

i

~~~~

?*

' o.,ji:

l G.

II.f i

s.

a./

r ?.s.:--.

+

a.

L,.

.t l

O e

/r V'

M

=-Nm.a.,'y g

e asw g_.

r.

.. ~.

.~-

r J,.

\\j, -

-(-

(

ys

,e

s E

\\

"NI

/

s h _...

7_

e 3

/

I 2

.o c

e.

m d

W Q

uw

~

1 e

a a E_

W 5

25 sz a

o-e w

{

W pw O

w Tl _p W

c ma e

e c.

c tr r

um

< W->

1 t

1 w.

_b.

.o o

p w a.

M

,./ -

t;

.3 t

1 f...L.r l.w. -

h..._.,. _.

u L._

-e..

11.

t j.

l 7'

Il li II o

7 4

lt-g e

y g:

i. N

_,J-

+

s.,

.%-y w.-

t -l s s --

Q lo R'

, l:

-o h.-

l

x. - _ -..T'='+'.U:..yT J

-- I \\\\..

l L1 F

h.

l y

C 4

w o

,.Il *.1L-s.

r-r 4

6 P

k 8

15 l'.

h w' u

-f'"

i 1.

o w

c.i o.

w

u. u o.

e r

C" l-p-

-o.

c5 C

N o

w

.C-4 4'

I@

5 i

Cf I ti:ii we w

e e

si3. n

~

W O

D Q

M

.==Y-w 3e g

y,

[.

<w.

a o

M wm.

. T.i~.I. _ I

s..(s

.1 k-s.

pwo N

e-mou

..1

,-r

.1_i _.-.l i

u o

g, g. __.

1. .5,, /

,f

'2 G

t

... /.

-~~

l 1

1 I

i g

= = -

,g

~

g jg.

q

,,p

M'. \\

.. l i..

IP.I y

.i t;

t

)

i-O;;-

j

,.i 2 7

'E I

I.

t.:

e '.

I i.

.E v.

1 s,

S,.,.

a Id

4--

y i

i,.

E i

}

3 2

i u

e e

c ~.~:

&CCl

-n

~

t

\\

2

.\\. "-.

I e,==c,

.. f-.

'1...__

u g..

.,,s..(......,.....-..........}.,s.,.

, a.

.......,s...

.. m:u. :.t;;s;;....

.a...

',. i. i.,) - 4. -

f,.

.. f,,., ).

.i t :E /'

,$,1, r

u o

9 g,s..

)/

ut.(

8

.r l

.p i.. i g

.t n..

~,i,, -

- N-.;,

3-.- j -

-...,.....n.

r

.. w:

v.

,m. -

i.:.1.

s.

j.

t c.

s

, !q...:p.~6. s;.:...:

3 g'

.a 3 y-F._~

? r /.3.,.:.,;.i. f.' ' ~ i.

3

...t n n.

f.. 3. h...

e,

...a T

r."-

-4

[

}

a

_ Q,- ;T.,(2 p

l l

w

g

. ~

I

'.gy _

6

=.

s.._

e

=

y 2..a i

- 1.!

,3 i

a : :=

=g 8tt d

i s 53 N(

le a

i r

i =

i.

.u _

?.

7. :

n. s s

s c

o

.r e

t L

j i

,l.

3,.

l

.s

}

~~- N N d L

./4

.'s-e sa A

1;..!_

-/

[

2;

-.1 )

a g.

• 1. g t

s

-_.a.

1 l';

I.*.

..a.

. m' s,

2 3 ::

1 L

a s

i

-s L. p e

. '%-'W-h.

.r' -

.. h.

N,. 7. '. 5.

c

f

.i F

., e.

r.

e

. t.

?

e 0

. i -,

s: =s L

~

s sl:

js \\ &g l

~M.,.I,.

s i_ !

i., _a _se i I

8

~

=

P W T.r' =-]: C.;

2

' - ~

1 ba

.-7:

1

>s i-s,

.e

. :.s g.

-T a

.L.

g..-

t

{

.s i

1 9

3 11 'T. ;t

,, 5 - r2 : :

s

we i

.i f !

3 a'-

• J

• t 8

F 13 -' 3 8

a

.! : R. :. 9:

i

~;

r %-

4 3

S.

_ _1. t.:.

L

..r.

p.

ri e

I

%~

,.s

.v_

.. s -.

l 1,

e. ;;

, i g; 3

3.

i i

g a

5,..

F gF

?. ::

i.g... e u,

g

'- 4

.x s

I

~

l k

m U

,-v-.w.~..y...~.,

........ ~ -.

- w.

S J

.g e

t.;...

ie t

• 4 Q.{

+Td O

s.*.

L E

e" en a e.

5 II

^

d.I s

m

\\ @v.%

~

e I

a.

r

- p es e

• a s.

t e-l u-a S e

y

,.e.

W d

~ ~ -

L. -

r o

o u.

Ia $

A.' * -

t **.

A e,

A e-g

^

g-V

~~~

.s -:

I g

,O so o --

S 0".

b b

[

g

.s

• e g, g,- e t 7, gg C,. ;;

. g 3*SZ dw-a -., 1.g ;;

2 p

c t o..

e t,,,

.s e.

uw a e

1 y

c.

3

\\

s i

1 t

=

l t

w e

1 c

c

[

e e

e e

.eea

• e M

a ae m e

e.

m, 9

g r

,e 4

g g

j e

m.-

y p.

q-P tg as f.

.I n

.c, g

I y

5 u.

c O'*

~

• jb 3

y

,3-w

.s-i:

=

\\.

a

?~*

1 lll IC r.

g a

=. =.

2.*.

e f

if O

O O

... =

n cf O

i p

g4 o

. =.

e.

v%,,

i c. t

~~

\\ a ur

.3

., _3 u

40 9 19 ' "

• ...e

,,,p t

s g.

• % *4 i

J e

J

~2L

( O *4 t.. * -

aw-l 2

p, sa

• a 1

,,I

. g g.j e a

o I

\\

r 2

'J (e

l-c.~ -1,,: : - f-i

~

J

<. r a

.a s

M I *h 7U P

a 2

-l *, * --.{ p.

, 1 j

=

e.

Y.

=

hNw.e

i

- )

1 1

1

~1 r

1 a

<<3 j

lg%:

l

.J

.i...

!.it

.s..

I!

f s s

Cdl

?

',s

,[.

kil H

{.

v

.{?

L gi.

g,

...n i

1 Q-

=

Q r

r All W

.I

=,

_.1!

r.

5

a.._n,,.,,.

.a

. }*

1..

I e.

s

.i.

a g_

.I c.

tu s

o u

y g

h

%.4

~*

g s

~

1e s. *.

e m

• 2 I

j 3

= g T.

) J ? q ;* I,

[

o s.........

3 d'

'. %w.

I

..s.

w

== - :

).

{

t.

. t t.

r a

...t 3,,-:i.s w

,g

(

E g

3

.g..........

r 1 a.

.. _ :. w -

....,.. e e

t

- ~.., -.

t

....... Nw{g.

1

... (.

....:.........,.~.-.__-_..:

1........

.'..4_.-

.t r-lt..

.tt-s:.... g :t *

.j: j..... I t :..

r.. {.

• i

..I.4... ; ;

g

", ;,

• s.

.=

r

. I: *e

..; W

- ) {y d

(.

(.

..).3s

. l...{

y 4e g

,. I *. !.

• 4.dg s

... '.... '... ;. s.J. 1 -

I t

(

c.

c

. a..

~.

...,.,.. g. g g. ~.

g g

.gA.

..,...a..

t

.c 1

t,,

s.

. a...

.,. i

,l j..... i... i.. t. t.....-..,....m.

i,,

c.

... i s

,[

,3, -.;s

..=

....g-s.

...t

........{

• f

.......a...

r s

e :.1 :. -

g i-

....I t '.

e

..s. -.q,.

S,...e.s n.

s..,....... t..t.,-

t i

6

..s........

t

.6 e

s..

L

,e -

4. 4. g r

.. 2.L;t. 1 8

..3,.g..

g.

e i

.s

(.

....i g

.g 1

....Avt:..* ; :.*~

r, /

r I

• 1 e.

%q...

.=.

e.

g

.g g

g

..r.

y g:

t-1 42 c

f-h.

r.2

..w t

......, t.

r :3 t.

g a

g 1

C

• • ..t

]..

,3$.

- )4....... <..... I..; I, 2 I,

t i

g

.t s.

J

<qs a

s.

.gr,....

; ; 3.;

t, e

g

].

1.

.... ~..

e ta

\\.

.i y-4 I

t.

f.

^%

..,w,-,,

m-

..i

.t t s

=.

,3..

i.<l s

w. l s

s i

e t

t 1

i i

i 1

l fi 8

yi

{.

4 s

{

g 3-a s

~

I t

I a

I 1

-t.5; a

1 g.

e 1

1.:

\\s i

s t

t-t.

,. { *5 s I

}

.ii U.-.

-'.-:.L

_ _ di.: 3 ~

O' ;. :.: 3 - 'r-m e

.a

- c s

ty!11

/!

!. ~.!-

.r ut e

a.s 2

a i

a 2' ' 3 3 ':

~

i-e

!3 T

I" /~~~f

'k'y< f$..':: ;l.::l:. g.

@U

• *=:.

.3 $

I

.:i $ = 'O.' :~- b d'/ E r

-r s

.2 ::

- N'.

....o 1

./

3 e

ez g ! ! = 1 ; ;.

I r l 3 -

I l

I u

I 5

1' 3{

j 5'

g 8

g

]

I 5

s : (

t i

\\

i F*

3 E

4 2

l

}

I t

.}

}

1] }

}1 g

.i

) 1 i

8 y

8,..-

e 3

1

.:)1 t

) *t

-E

/

t 1.

3 y

i

{

1 i.t,..:

5 t

p

.s t

a..

3

.(_a a 1 a l' E. !

. r v la

{ 3 3-7 I 1 I l

aa

{. e si e 1 i.I l t

• IpsTII t a.

1 -3 s

l-r

.3 w

....s.

,e l

s 5,.r....

I.

r 3

1 r

1 Glib d il-

-i, F; M,

~

I.

~

n,

.o_, = & o.. a u......o h..

'a

=%::..

a -

2

i g :. E 5 i!

p.

t s:

=q c.[I

,y, izT.R'% ',u'=P f'" i=6,@g

~-

t.3

,i i c_... _. _i,

Ilh 9,;i a. 4 { 7. t '.g,- -,. =..

v. j,,)

> 2. 3 y g g

'.i,,,, i. y w %..

iI p, 1 ;3 I. !g '

g[a g 4

i.~--_---.

.3s

.i u ;,

Ii

.;*1 j s1 8sr.' ' _', '

z ' _' J l

'\\

IJi2g1 ght, V,4. a.'i.

-~

p 2.I g g 6.

.4-

, e,,jyk:r.r

- - - rv,h < t s

'ej I

83. s l,

[.

..-,b.e t

1s.sst3{j.

3

, -m.

-s : is 2

}1 g

i U

N' Y ::'N DI !]: -

f 3

"3

!!!III !

t li t

%i Jfi

• s ~ Q. ;.h.

1Qys 7

l O-

.v

(-_,___,m I 3,,

f e,.(, ::,

.s l

g g,,.,

p O

{.

'A t,t I * *,

y 15

8 C.N t'I l (.6 3"

h-f s.,

". I

/

i

{

.k

,i,-

. i

. i. t t. 4

$k gi$

• d n,

( *j

!T $

1.4 -i Ja.

et:

8 af3

! J t

. :d I I I I I';*

• 4 g

I r

.c r a..s l

y l

-[ - -

~ - - - - ~ ~ ~ - - *

~

~

M e

1 D,

~

m.

e

_________m__

i..1 b l'N1 7

.i m

d o..

I$g e

u N

I i

/*

.=

,4 0 < *)

t.

o d..

I.,e (\\;)

j

.s

- 2 l

• e.

• 3 i

n....,.

s 1 v3 AG =.

c:

I w.1 O

== a

- su

~~

. :: =.M

- :: -:t l.

t:.' r

=

3 I

co v '. s E

== -. to 7 -- e t "

=

_ u.n.

-o

.t u c : b* -

d o

=

c-e a a.

==

m a

w o

_a

+

s su

e. e.,a

.c.

u x

x r:

m. n n a s n. = = -

._e

~. -

u

=

% 09 l

.c c.. t _

I a.

e

~

~

d

~

n

=

=

5 a

~

c.

=

=

=

3 2 1.,

4

(

3 !;

u

r= gs3 a

s.a c;

u w

61.. b6 g

=m v

og z

=

e r<

3 a,.

,. _ _... _......... ~....

..=... :............,......,.

.s

.,_.~.~._......s.............

t e

E*.

<C u

\\

\\

s, m.

v

,e 33..

=i03[

E!.

'. W g3/.

H r.

v a.

=a 07 t

e e

g

. *. =s...

3. n 3

• a F-

=.

== c 3

s.

. p.

==..

=

1

x. w:.: :1

=

w 4.

d. T 2 %,

i.n d

'A P

a.

-6 05 6 OM W

-~ -- * * =

r i

p g

F

\\.

k 3

g 3

5 t.

)

=

.. :g 1

3.2 F

L g.

s

- w v g-LJ.

p t.

Du, g s

.". 2.. I i

t 4

t 4

L =

i

,e, %.

w i

e

,g 88*

t 9

'i

e. _..

Lj

.v. 3 j 7, e

6 e

V

. *i t.

,6Ng

• i.

--.--b+,

a e

1. *I+ !

Wj { : 4)

..1

• M-rf

,:g 14:

3 rL 4

it' i II:

j.

!N.1 1

**]..

i C;;

- j

s....n 31

.h

,a e

f

.I s

t

? i

(

Ms E-f,

[

c a

1 E

- i.

1

=

.g g

C.} 1'W U

1

.c r.r s

kU

[

1.e.

S o

c:

J

:; : 5 C

7

$ w(a..

22 i

-1 *1 C

E gO 2

a f.g m.* =

$d N

• O

=l' e..g (H ! - ) ni

.N.

l f

I. )

8 I.

Ai

'-G,.h

.'.~

e m.s nw

[

J r'

\\

OO c

Cf. ::~-

sh a yy Q

?

g.

> >E $

CTA 0 a.

s E-s n-s O*

= u $

er C

k

'E E

O, x e

l cn _

4 s.

h.

4 r

s a

sj%

3 p'

-. R%

1 1

1 1

n 3y

-<w

• 1

q g

I h

I X'X i

j- (~

5 i.4g m

4 t *,

t

.a

. ~...

s t '.

E5

.?.

. s.

f,.

ge""

~

g r-r k

O O),

,E, # A y

0^

=

N i

" e.

a

~..

i i

tJ *J * )

I g

)

(

N (3

60 e

a a.

a t

o.Yp.Y N7N-

^ ^

[

f

a.. n.

?..

J.- -

g b

w.

s

]

4

L t, g; 3

.** 4 l

.A-t

\\

t, -

i I

l

y _7.

e 1

i *wl t,

w... l 3475 INI

~~ E lTt1R nP: (14/1LCU.P) f@p I

2603 4

toi.

trti$rt ;6c g

=o IN.ta? %1V0l n

u

n 1740

~

o

o..

o i

e==

l 3

wovemt cces e ~ ~ ~ ~s g

a G

870 gDDW g-p,g _.-...Pewtsrcs

~ ~

tt PSr. C'.LI10

. i r

i t

1 3o0

'too too eco

(

. 9 Capacity, sp:::

3000 -

I HP1 - HPSI system Celivery i

2503

.P;.h.f..V..a.l.v.e.. setting

.1 l

l IT

• 2000-.l

. c6 I

mE t!PE i

I (sti;KFup)

T-pui4 P t

R 1500 " l I

~

. o I~ ~ ~

s.

a.

Y m

10*3 ~

"C Y

'*m I.

G m

(

'as %

C.E t.-

'N r

ter Pttr47 s

503-L

\\

.g i

.s 0

C3 203 403 C03 P

t Ocitvery Rste, c;: /pt: p

.a

\\

. i % n -.. ~uz.

...=:., -:.". ~ --. -.:-:=...r.

.... -.. -- -... - -- - - ~

. - - ~ - - -

m f'

is.;a I,

it.:;(

r-'

r=

-.i-y H

.6

t..

2 e

i

a..

s

,,,.e.

, s. -

. r.

....n..o.

s c..

u I

a i

g 3

7

?

=

.E

~

~

i L*

-t

=

=

=-

t w

e.

_=,-

.x 4

6

. s..

oc

.. a. s,

6

.t.

j

• p

4.

• 3 F

L

• t,..:. : T a t.

.r.t..-.

.. a.

..2..

t.

...,. ~.32 g,*...'

.. a, a m

, f 4

J A

A J

L.

.a e

su e u we e smas news t,

s r

p L

O O., o ~

,v Ae g

• ~,3

~.

l.

3 e

l.

?.

r.

r, g

=

E=

• i

< d

. #s I.'

e E

i l

• 6*

o a

u

.=

c..

g

.a 2

3

~':

.t.p.,,

s s.

4 c.

y

,..c....

o o

oce

.a.c.,,..a...e..

a

..e s

o c.

4 g

a,,

p t

, tg e

0. e.2 r

4>c t"

o 4.;:

U o

- u T.

p u,e

.?

g

a A..

k.. -

i

== -

c C.

C' f

f NO r A.

.e O:

i e

c r

o

..e...

.=.

t

. =.

3..g r...

7,, r. r.. :.....r.,

i

i... / r51..;..;.

r.. :

~

n T

,3,....

o

.=6 g

g 4

A A

0 g

A g

}

f P

I g

kk g';8, M

N O

P".1 "I PM M

~ _ ~ ~ ~ -

e g

g*

l I

t 1

I

.e I

r..

..~.-.

n.--s--n~-.--

..... ~...

- ~ * ~ - * - ~.

• ~ * - *-- w n **

~

2. 0.

• L*-*-

• .ba.

--. ".I

.w,t t

. I '* i,1 s

al s.c sn G

2..

.i e t

.,. 2 s.

.,Q ]

.c. s 1.

t a

v t

.m

.P e.

s.

g

c. 7 V.,

.s.

C.

ts

.t i

c ll 6

A*.L.",

t s

e.

u 6

n o

.r U

t s: n g

s n;

e..-..

t o - r...a a

g

f.

~ ~

g p

t u

u s

2 s.

m e

y y

I.

s..

e t

.s t y.

g a

w

..a s

t. es.e a

[s it : E.::-

6> -

-g E

o,,

G' -

p, g<

~>

t r

=g a

r, r

L-j s.......

Z..

y a

, y. : y g

g;gs,g

, L-P. t. e t.

d E

s..

. c-

, 5 > g Sg 3

' c

s..s 4 -

a.

Qt

..I r

% 4 7

.; =

E I.. y 8 r

.4.

4 5

e..

o

..4 t.1

.o k>t 4.

a.

a r

=

i.

3 a

o.

L

. F'"* 7. s,.l..

e r

5

., c.

L s

.e

(

1.

s. *(..

e R. e.c t.

.Q

.d

.O.

F 6-

. Q.%

(

g(

e g

e.

I

• 83 e.

.o

.6.g -

3.

.c -

e

.oo 6

.e mE T.

6

'.a O

b W

U r

b j

g F

i

.s

• .1.

t

?>

E.

• Q 4

..e.

%y 4

m..M I.

)

g 9

$,l y Y

r i

l e

.p6 I

I L_

, - - ~. -

...v Lr s

11 y

i

}

s re:

'... W... - s -

e t

t i b;pWl i:i;,"

ri ti t "C 5.. 5,,..

' h h !! N -

• 4 p

.c.

a. - ?

J g

l EH

.A T-

.I t

I

,.t W

r 5

a

/I

t 5

t.,

is.

II' I

t, y

'N

. = = =

o II I

er=

a l

le E

C r

1 4:

,F

-=

T

• l y' t '/.

i,

~Ea3 (

g o

1 Ei,"'7 I

a

'4 i

1

=

5 t'

.5 r.. II )~o..

• -~^

%G I j j '] j -

iS* ! p. 4 ta c

4.

.: 2..:

Q,A

4: 3 i

A.

ie nmu n it

a.

l 7

y c.

l v

n.

e t.,2..

t u=:.-

J a

n.:

a r<

l

>e

. f.8

,L

)

D r'

f g,

f

,1.{.

nl.

3 6-!,

_; y,5 4

'g l..,.

.1

.n..,3 -

.a s w.

t*_

12 ll 1

z

e. a tii

+ius w.

aa55e i

~

+r f --

r

.i. 5 :

I

..r 4

u.,

l f

.l s 9

t M

.f

{

- 3 ;*.

~

re:

l. :. :.t.

e

, e: :

c ).

... _t 1

o i.

I

a i

tf,

(

i 3 5 5 i i.l w i*

3:

13. m e:1,-

p*

c e

M.,

u r

i stu n,

FM

• Y

{

.c J t-

,?.t o *=

s.s 1

3 i

k

y._

j n.

c

-l 4 g

s i s

=

..l

.o e..,.

=.. t..

s..

r w

sv

==

-.=

u a

TT..TTt.

y

= a n h-a t

l 4

3

,h i

.c.

t :.

,i

.. E ** 2 77. *.*

1. ,e

7. ~

t De S

6 4;

• • a

.69 N

E',

N, 3.*

n i

M d

8 **

n i

"=

'.g

~

80 g

e s

ess s

e.

t.

U g

7

.o.

o

.e

..w

=

e-

.I.

.I.O 2

.'o E

.R 4

o.

~n~

n w

a Ae e., s Ps w

.w.

e d :p

.g r

.1,,l l4g

• i..l l 2.,a 335 *.

em e,,

a,,

s

-a,

'M a

g '-

• -1 l'

1..

t

=..*

4 g

a

,4,s

~

i

=

g as =-

n I

l. #, el l'.8

[

18. f f

d y

-I li; s

P~

.s

~

=~

g

=go-

=

=

.s a

t.3 e'2 1

~

J:

p

.~.

w l

..c......-

F s

2

..5 5o s

-s'

=

y a:

r sa

- ['

s

• s 4,

s L,.

s.

g 2"

e 4

r.;.

J

=

n I-rw W

k a

h.a g

4,,3 b

=.

....~

• 3 i.

~

l s

e e

e.

e n

• 3 La t.t S

3 i.

L k

0 A

O C'

r

.t E

t.-

~

s

. ~~

yn y

m a

w 3

l

. s., g 4,: g e

,a w

~

r u *~

o i j

.., 1 1

w E

i x-P t.

b fa r-A

>g__

..s i

z.:_

(

i

w..c.

_2...

4.....,.

-_r.

O

~.,

Part C

'v-W i

.. cs!

GEfiERIC FESPC:;5E CF A9 03 ERAT!!;C C-E PLA!IT TO LOSS OF FEED,:ATER GR A Sii.:~r. PRESSURIIER RELIEF /5AFITY VALVE

),

In the event of a. complete 1:ss of feed. tater, the it ediate resp:nse of a C-E fl555 would be a de:resse in s:ea generater level. The Icss of sub::cled E

feedsater flo.e would result in a r.ocerate reducticn in steam generat:r heat rceoval capability and a sica rise in react:r c: lant system (RCS) :ressure and temperature. '!ithin 15 te c0 seccads, a reac::r trip sign:1 uill be produced by lou steam genera:sr le.el, resulting in a resc cr trip and a turbine trip t

(for a plant with a canually initiated auxiliary feet. tater system). -After trip, 4

r'i.he du.p and bypass (if in the n:real autcratic ::de) will regulate steam gener.*

r.tdor and RCS pressure and tcrperature :: hot s: ncty c:nditions and the power operated relief valve would not open.

The stean generater pressure will stabiliae within a couple of minutes; decay f

heat util be re :ved thro.;n :he 6.20 and by; ass. This c:::itien could exist for 10 to 20 minutes tef:r,e the hea: tr:nsfer ca; ability w:uld start te decrease

~

due to an ex:essively Icu steam genera:ce level, thereby resulting in an increase

[:

in RCS temperature and pressure. If auxiliary feed.:::er is initiated within ~

this time perf 0d, the pr.er ; crated relief valve will not open.

y 2

For an event which d:es open stie ph:er operated relief or safety valve and which is followed by the unanticipated failure of a pressuri:er relief or safety valve v

to rescat, the,RCS ulll rapidly capressuri':e..If the relief valve d:es not' l

rescat, the c:wnstres: isola:ica valve c:uld be ranually closed once the RCS pressure drops below :he relief valve closing set;oint. If the valve is not, or cannot be isola cd, the de:ressurizatien uill c:ntinue. In this sitdationi A

the pressuri:er surge tank rupture diskawill fail, releasing fluid to the.

4 containment and the pressuri:cr bubble may be' lost, resulting in liquid relief 2

thr vsh the valve. The release of significan: RCS fluid to the centainment

=s:M.:sult in a cer.: sir.tcr.: is;la:icn signal.

3 "r.5re the RCS pressure appret.ches the saturation pressure of the hot leg, a

'g 5.5::y injecti:n si:.1 uill ec:ur, aut:ratically s:artir.; the high pressure E fety injection (hPSI) p*.: s.

If the ficw of the MPSI pump is sufficient to increase RCS pressure, there is no incentive for the operator to : Urn off these

(

pumps to prevent overpressuri:stien since the MPSI shu:sff head is below the s,b pruer opera:cd relief valve setr: int.'

If only mini-. : s'afe'euseds are availabic 2

h (i.e., one HPSI purp) due to 1 css of offsite p:wcr anc a failure of a diesel or p

HPSI pu:p to start, the HFSI ileu will be ade;uate to keep the core ccoled. If r

the reactor c:ol:nt pur:s are trip;cd, the core will be adequa cly cooled as long

(

as the ECCS (1cu is : in:ained anc the s:ca: concraters c:ntinue :o re=ve decay i.

heat. The layout of the RCS cnhances core c0oling t'ecause the core is essentially,,7 l-at the lo..cs: cic a:ica ei :he sys:c:a, thereby, rc;uiring icss th:n 25" of the i

RCS inventory to Lecp the core covered.

p

• Tht: sitter:r.: c:s n:t crply to ":ine Y;.nt: which has high shut:ff head pu M.

(

r l

~_

's t

e

~

=<:.g.:::= r: =~ n r.t.: ~':-. - :- - -

~ ~ ~ -

^ ~ ~ ~

~

~

~ ~ * ' '

i, 2

C.t t.u k 1

' :c.;:

Subsequent coold:un of the PCS e.st be regulated within rates specified by existing procccures, by canual ::ntrol cf auxiliary fecc.sater flow, and dump k

i valve ficd. The coole:wn cust n:t de so ra;id as to also cause a

~

depressuri:ation beloit the saturatien pressure of the hot leg.

h Depressuri:ation cust be c:ntrolled within the a;:propriate existir.g pressure-tc:;erature guidelir.cs by talaneir.; cf the ECCS ficw with the stuck pressurizer :

UJ valve fir.r.t and Other fic.is out of the P.C5. as well as the shrinkage of the RCS \\{-

as it cools d:un; again, to assure that the RCS pressure remains above the N

hot leg saturation pressure.

W9 r

b.

r

'r t

7 t=

r' k

F.

r

{

c r.

L L.

t i'-

i P

ee g

C' e

4

.d F,

b i

o i

e O

gg gg

-g

..S-

,m 4

I'

<