Text

02 Re-Evaluation for Vibration Induced SG Tube Fatigue.
	ML20045B713
Person / Time
Site:	Beaver Valley
Issue date:	04/30/1992
From:	Pitterle T, Yant H; WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
To:	;
Shared Package
ML19303F620	List: ML20045B695; ML20045B707; ML20045B710; ML20045B713; ML20045B718;
References
	WCAP-13350, NUDOCS 9306180331
	Download: ML20045B713 (12)
	v • d • e

- .

. . - -- .- , , , m y., .

. w;c ^ - .,

.v4 ,. , '-

s.

[' ,

3 [ , 3.( i y [. ,

. hm

~.

cc a .,-

/ 4 .'M . y.. k. .

^

r[yl Ny,9,;- , 'l -

3 C. u '

, y t ,

/.. , , 3 ,g, , ,

6-y d

'i ;P- ji l q'.1 ; r y i e , f.

e gau.waw s gg;

.. 3 c

1 g..

9i..U:. .

t

. w/ v.

wg. . . , m-< .

J9;}

u r ,

n l !:j mw n, + em yw[y

(

e e

, m c

.f):: -

,~,

,e , ,

, a <

. ,- +

J.T 1

s ti n

+

a hg 4 .,. , , , , .

i s: k-) ? ;,_

m,- ,

( ' ,'

j' ,

, gy,* i m' (g 'L 1

%l 4 4 .f.

a

.5 "u L: , j)

I w < L r :%G $ s En e%- ll C I,e .h U,.QO.eiv. S& - ,uLb M

,q _. : i a: my ^, %&." , y y

>i. v.

t .: rd p ;, ', w '

r- .

s ,

.__ 5

m"- s. ;P, o y +1 o

. - ,. t.; ..

~ , -

r. - a..

mn ,

p n,- f* cc .a d

[

'l- T, T g

.n .

w

" J4 d

R

.g g i.

, - e ,

s. . L-n: '

+ g y s -

c O

p.

, t F ,

, .C ,

/3 ',

~~

i _

, e ,~

.,. s , , n e .a 1.$ S (t.

v <

r . . 1 r .

s C

. - r / >

.z en r n my g g , mpp..: e v up w c?,

y, -

n , .p, n

' 5 s

q'

v p- Q gy v ;r, C

Yi?

"< - , r, ; -

, .u

,. s -

o

, , 4 hC

, ,y 4

4 * ; "c.

% -:o c

1

+d(

r l 5 y 1 t.

p. ; 2

' k .': b / .g 4 1

. ? -

, , e t

-a/V

' , , 4

. , 3

..,y _, :q. ' '~ ij x . . . + -

~ -.N 1

,. '+ / I i .,

, . . 4 s ,.c yn

f. \. ...

, ',; i'n.

'E' Jg 1 g

} ' ,_

a r i ,

J '..

+y4, g ..:O.

62

. '~

- g, 4,. ,g" , y , M.p

,' G& ,.

i

q w-c-

$ 'l L ' %

4 M

i t,

$. m 1q e

] _

f. s

' ; h

< s e

l}

r ,

p *3;

. ;m4

~

t ,

TE: ,

, l.[

s s . . , J

~

s 3w ,.>_ 7[ Jl gl ' ,, r

._ hl qc i s ,

'< f&'l':_ 1 s

...j... ..s -

+ s +

j ']-l. , , _

'N -

q !

.: }; _'.. l t

[.

s < i*

m.,

, i ,m.d-e, 3>.n '

,y ;

r 7 y, ,. .w, ,q (A '.n 3

1.-. -j -

s

...<s x i s u3

,S 330 ,. , a ,..g,.g, ._;

y ;.

+

m,o

..: c .

4 ,

y .:i

- fwh%

3 w.w w.. . o v- = ~

k n -

y 4 ' '(-f;' ., # { 't 4 ,m ,

9 i% .'

'4-

.].,

1,

, . ,.ys/N '

e / i f, o ,

s ,

-w %*

,' O V m, h'd y y' fA3 d

l<. ( ,

,, G 4 , ,

f .,

}m ."t .

(" }

u ..

s .m

. cyf 4- o

,i-

' r s

'^ *' s

, g3 < 3 s

y -

n p +, y y ,

4 >

s ,

.k, 4

h/

^

+ < M 1-Q e >

m s

w

, e 4

= ~b- ,. .

^

t,g a

, y .

p.: e , ,- 1 t < 04 n+ 4 s s .p ' $' i

+g s yk#Q' ') ;

g, s

,w i >

, ,- : - y

.i m

2 :6 f i $ t

.) h$ ~ ' ' '

4

.n 1 - , -

1. .y . .

. g, . , , ',d',

, ,m_ _

, $ %.3 .,P W.

[ gems.Lehn ' '

/ s ,

km4 9306180331 930608 p i, ; '

4 PDR ADOCK 05000334 PDR

- fs, 3A , :c , w, v ,

, dM)!

&m p ut: w. . t q; _ ---- -nmem ~ v c

' ' Mii

5

. assm,a.s.s.REEEE.E.aE.E uE

.a,gewe%$a@4%yf' wg mM q%gdr8$@%gggd e

s94kW Qpgwssw w a 4 yg+gv ew$

gg sw@Sk M

sg%pe Kktg rwa g gg yg E $y w

'. ig$

p3j@! Meg %gdte p*,dvd{g%ggwhpfayd;$s,#

A+

%jq l g%$P

%n JMgd$g#wim y%syf-m&yt$MNp$w;9p fii e +S s

7 d1?po e 9;,

4 M y ,g h~m$d;p%Mde$ep

' M ,eypd bdmomm,.

E L. 4 y tmz c#85$*

y gg4WSbM % wmzhwW .) ? hag?j4 yi 1 kn " %

- ' < I ,j Rgp$$6#tes$$$E$$$Mes'f-e:hMgg$$,;$w4'i g__us,32.da.nW 1 i:n88:9sr_

h beal

WESTlNGHOUSE CLASS 3 WCAP-13350 4

BEAVER VALLEY UNIT 1 "88-02" RE-EVALUATION FOR VIBRATION INDUCED STEAM GENERATOR TUBE FATIGUE APRIL 1992 Verified by: bM H. W. 7 apt '

Verified by: Id ODa T. A. Pitterle Engine W, Consulting Engineer, Steam Generator Steam Generator Technology and Engineering Technology and Engineering-l i '

I I

"88-02" Re-evaluation of Beaver Valley Unit 1 SG's Ref: W. J. Johnson ltr. NS-NRC-90-3498, .. Tube Fatigue Evaluations Update", March 27, 1990 WCAP-11799, WCAP-18800 " Beaver Valley Unit 1 Evaluation for Vibration Induced Tube Fatigue", April 1988 j 1

Beaver Valley Unit 1 has been listed as a " category 6" plant in the referenced letter, requiring re-evaluation of the eddy current test data and the flow peaking interpretation of the same. The re-evaluation process has been completed, with the conclusion that four tubes in SG A and two additional tubes in SG C require action; and four tubes previously plugged in SG C may be returned to service.

Published in April of 1988, the Tube Fatigue Evaluation performed.

for Beaver Valley Unit 1 preceded the mos* recent eddy current interpretation of [

]

The AVB data for Beaver Valley Unit 1 has been reviewed to evaluate the possibility that the more recent methods would lead to different AVB placement (and flow peaking results) than were given in the original WCAP reports. In this review process, detailed AVB signal maps have been made for approximately 650 of the 1850 tubes originally considered, and the eddy current evaluation has been repeated for approximately 300 tubes.

The interpretation of AVB positioning when [

J In the Beaver Valley Unit 1 SG's, this condition occurred most often in the proximity of Columns 35 and 60, and resulted in several additional tubes in SG's A and C being identified as " unsupported".

The revised AVB placement maps are attached as Figures 1 thru 3.

Examples of the results of the updated AVB mapping technique are the relocation of the AVB's shared by columns 34, 35, and 36 in SG A. A large scale map of this region is shown in Figure 4.

Reevaluation of the EC data for this region resulted in the

" withdrawal" of both AVB's and produced an increase in flow peaking for the unsupported tubes R10C35 and R11C35 to the unacceptable values indicated in Table 1 and Table 2.

Conversely, in SG C, reevaluation resulted in the " withdrawal" of the AVB shared by columns 48 and 49, and " insertion" of the AVB shared by columns 50 and 51. The net result was increased support for tubes R12C51, R10C60, and reduced flow peaking for tubes R11C51 and R11C52. (See Figure 5) All four of these tubes may be returned to service.

The flow peaking models used are shown pictorially in Figure 6, and flow peaking interpretation in Table 1. The resulting stress ratio values are listed in Table 2 and the stress ratio plots in Figure 7. These figures and tables supersede those originally supplied as a part of the "WCAP" reports.

In conclusion, in SG A, tubes R10C43, R9C60, R10C35 and R11C35 require action. In SG C, in addition to the previously identified R11C47, tubes R9C60 and R11C53 require action. Also in SG C, tubes R10C60, R11C51, R11C52, and R12C51 may be returned to service. All other tubes identified as being unsupported are.

judged to have acceptable flow peaking values.

The evaluation documented herein is based on the full power operating conditions of 3,900,000 #/hr steam flow at 837 psia, used as analytical input to the referenced "WCAP" reports.

Operation at a lower pressure or a higher power level may make these tube fatigue assessments non-conservative and would require additional tube fatigue analysis.

t l

{

J

eeeee :: l 9999e : :

e9eee = = : i 99999 : : _eeeGe ((I GeeeG -

I 99999 -:

eeeee :: 19409 sij Gese3 -

OeseG eeeee : eeeee 11: GeGet seeee : eseeG 11_eeee.

s = -

~~-

8 999e9 8 : eeeGe E1_ eeees 98989 -

seeee : :

Ge : 99999 s -

eeee9 : : e@e iI eseGe l

eseeG : :

eGe iII ^ e9999 e : - I 89999 : : 490 II GGQ9e ?i i i eeeee 99999 73 eee iII 2 2 'I I }

eeeee li: ese ill eeeee Ei- !!I e99ee -

ese : I seeee = =

99999 GGG TI lI e :

[I[ OeeeG t EGG 9e Gee s e9999 :

8 j esees : 000 i7 eeees Fi 1 i

eeeee Ti -

Ges ii[ eeeee j]1 ] }

eeeee T : s GOGe s eeees [ei[

liii1

-~

QGG99 SGG II- Geeee ii-99999 7-- GOO il- eeeeO Fi !!} ! 'i eeeee T-- _ ese il eeeeo ii_-

Geeee s EGO s eeeeG : :

eeeee EI- OOOe 99898 1 eseee iii eeees : il eseeO 11_

eGeee 8 98899 8 eseee 111 0080e 8.__ -

ees : : eeeee eeeeG z i 2

--eeG III eseee T _

seeee Ei[

seees =

eeee@ : : eseee # 2 ! l'1

..]

See90 1_ eGeeG i(( 99990 11 } i j

eGese li j GeGGe 11 [

j {jl

-iziei.i- j f f -iziei.i. j f f -i=iei-i- j

- - - __f _ f g. j 3 f3 Figure 1 Beaver Valley Unit 1 SG A - AVB Positions 3

l eseee =:

eeeee : :' eeeee : : :

GeeeG : : eeeee eeeee s ': eeeGe ((:- seeee

. Geese -

eeeee : : eeGee Geese -

eeeGe s : eeeee ((:[:seese : -

Geeee s: eseGe m s eGees .

eeeee : Geeee : Geese n -

eeeee : : eeeee s t eGeee . :

eseeG : :

eeeee eeeee :

eseee : eeeee 11 eeeee

= = , r ,

eGeeG : :

eeeee : : oeGee : :

Geeee eeeee : : 0999e : : B h eseee : eeeee : 0e90e seeee : Geees T oeeee i:

s

~ ~

- - I I I !

,!!)j eeeee : esee@ Ei >eeee : C :

eeeee : 2 esee@ e : ( )eeGe eeeee s eseee s : t reeee : :

l. i eeeee s a seese n o seee ri a

I eseee : eeese s.i o eese :

l li 3 .

eeeee :

eeeee m jjl eeeee : : seese gi oo eeee eeee i s s

] !

eeees : eeese s : o seee a:

s i

iij l seeee s : eeees s a n eeee : ~

<J ~

eeeee li eeeee [i t ieeee El ! !I eseee 3 eeeee: : : o eeee EE eeeee : 1 eeees ti; o eeee =_i -

000#

seeee s : eseeen s : o seee : :

seeee T3 eesses.ti o seee i _

seeeG 8 : : eeeeen s ; o eeee s_ : e i , .,

eeees Tii eeees iII o eeee ri j h:

I eeeesti l seeee sa i ti;

,,=,- ..... j,-} jl} ,,=,. ... il j 1il 1l!

, ,,=,. ...

9 l

J i

Figure 2 Beaver Valley Unit 1 SG B - AVB Positions '

l

! 4 l

l i

eeeee :::'

eesee = = :eeeee ::::

.@S009 : : : GeeeG ilt: OGeee -

eeeee r :: eeeGe sil eeGes a e80ee : : : eseGe s eeeee : Geeee :: :lGGOss s

m E esees *

.2 @Je e e :8 : : eseGG Gesee -

Osa ~ ~ :

S$OGG E : GeeGe -

EGG 9- :

GGG ! GeGee .

eGese li _ GGG li Geeee _

9e089 11 OGG 11 eeeee s eesee : : _

OGO s OGeee

I {

g GeGee _II[

eeeee : : OGG ii 89999-GGG l i l eeeee :

!3gj] S I EGO ee f! _ OGe r r : eeeee.- = =

...i

ees tee -

- OGGG : ; eeese : :

{

EGG iTI eeeee 2 :

eeGleG i eeeeG II EGG ! : eeeee FF -

1

' I i u .

eGeee T-~ -- GOGG iii eseee Ti -

!l #

Geeee I ~

@GGe s s ; eGeee Ei 1 I I Geese 8 GOGG g ! i Beeee Ti 3 3 3 lA Geeee l__ GOGG EI GGOee a : _

}

GeGGe l__ esGG ail eseee : :

3 3j [

eeeee 8 99999 : 2 Basse : :

fe 6 G S, !(( eeeeG ii eeeee : :

desee8 eeeee= = eeeee s : oeo, ,

eeeee i- eesee Vi eeeee ri eeeee n eeeee 1 :; eeeee 11 GeeOO li _

,Q,@,@99s 14 OOeGe 11 l ,'!

GeeeG

!!]

8 1 _ O- eG e G s s -

eseGG :

GeGGG li _ eGeeGEO eeeee TF -

t_ ; eeeees : : eeeee- : I l!!i l ,,=,.....

=

j } } ,,=,=2,... j} ,,=,:,. .

=

j.- }t g< ;ll' ,

i Figure 3 l

Beaver Valley Unit 1 SG C - AVB Positions ,

5 1

d I: 2 e Q a is

g a e e ie) (e~ c) (e) (e-)

& P s (Q;) 2 $a (ds) i (O) ;

D .

C, s

D (:C) l S S O 1-

' ci xd ,

$) kv c

?) e(S) te) 535)

V s a am )(S)(S)tP) a 2 C D D C Q P

< gHW' cef)(w@;)(%)F%) e a - 3 G *G 7

~J O S a : W D )(D)(h)<h)Ie; a

V W C )

D;,L O ^-

s (rv ?) I? ) (_ d ;) k Ss )I' 6A) o .C O

x (A) e E (O) o i ? k?) F6, d)(9) o C

r A 6'

<-e m) g- ) (C::)(9)C-)

o o o c' _-

I O) (P) (S)_

C C C

_ )

Figure 4 Beaver Valley Unit 1 SG A AVB Insertion: C34,C35,& C36 6

- .__ ,i) c e -

L c c 4 (ad) v w6::) %u (a) e ) (p)

U e (Q.) u ds):a(e)'

v ne v

i

% Ls) v e o e c (c=l) e c

&) ,o 1 Lt ) Le ) (G) e &' c s n (sea) v v (1d) e (:c) v Lr) (e) o e p A'n r

- :: as:)

e (w;)

4 r- :) rw ) (v)

] Q a -

c' e r o a O

) (d:)

m a Lo)tc)Le) e C S\,SN

\

~

o 4 T if vl (f t= lf,C) Vl C') \D}

\_ 1

\_

W _

C C S

($:)N

~

4 :

(D), tD)(D)(@)

D p o L

ws:)1cri)' -

G a)E ) C_)

w a v Pn kes ) & )s n

o ,r-s

'( e as s -

v)

- 1 -

v)

=

o D -

) _

4 Figure 5 Beaver Valley Unit 1 SG C AVB Insertion: C48 thru CSl 7

TYPE OF AVB PEAKING TYPE OF AVB PEAKING TYPE OF AVB PEAXING INSERTION FACTOR INSERTON FACTOR INSERTON FACTOR s 3,b, c.

4 Figure 6 Flow Peaking Models 8

y l

l Figure 7 Beaver Valley Unit 1 Plots of Stress Ratio 9

4

Steam Type of AVB Generater Peaking Peaking Row No Column No Conficurahon Factor Ba$L_,

A 8 31,30 -Sa f 9 5 Ae C 60 -l e, <1 m, >4f 10 60 -8o, -8t 43 -de 35 ~1m 11 51 4b 35 -Sp Allof the remaining B 8 61 -5 60 -11. -8a I 35 -5g,-Sh 34 -Si 9 60 8e 53 da 35 -1t. <8n. <8o All of the remaining C 8 66 <4q,<1x 60 -le,~1g 35 -4f,-4s.-8a 9 60 -1 m 35 8o 10 53 Sf 11 53 Se 52 <7c 47 la Allof the remaining s

Table ~l Velocity Peaking Factors and Peaking Ratios for Beaver Valley Unit 1 U-bend Flow 10 J

S.O ROW COL F.P

' ALLOW RSR*FP STRESS RATIOS

- F.P ,Oc A 8 31 W/ DENTING W/O DENTING 0.581 -

0.11 0.10 30 0.580 0.11 0.10 9 60(35) 0.942 1 1.33 1.22 i

10 60(35) 0.735 0.28 +

0.25

~43 1.074 > 2.0 > 2.0

'35 1.103 > 2.0

' i > 2.0 i

' l 11 51(44) 0.883 '

O.64 1 0.59 q

35 1.135 !

I I > 2.0 >

> 2.0 i !

i B 8 61(34) {

_0.621 !- 0.16 1 0.14 60(35) 0.695 1 0.29 t 0.27

'35 0.594 ;

1 0.12 ! 0.11 4

34 0.621 i !

6 0.16 i 0.14 i

9 60(35) 0.628 0.14 1 0.13 t

53(42) .0.769 0.42 1 0.38 i ;35 i

0.628 0.14 ! 0.13 i

l i

C 8 66(29) 0.676 i

0.25 1 0.23

'60(35) 0.531 0.07 1 0.06 i 43 5 0.750 0.44 i 0.41

! I l-9 !60(35) 0.942 1.33 t 1.22 i :35 0.628 i

0.14 ! 0.13 l

1 i i10 153(42) 0.893 i

0.81 i 0.74 i i f

ill +53(42) 1.376 >>>2.0 i

i > > > 2.0 iS2(43) 0.883 0.64 1 0.59 14 7 1.298 > > 2.0 f > > 2.0 i ! ) i i

! f s I i 4

( )* - An axisymetric model (with symetry about C47/C48) is used. The ' mirror immage' tube has been analyzed.

Table 2 Stress Ratios for Beaver Valley Unit 1 11

______ _________ _-- -- ~ ~

ML20045B713

Text

Navigation menu

Search