ML20132F408

Forwards Evaluation of Worst Case Scenario for Jet Impingement on HPCS Suction Line,Per 841219 Request for Addl Info Re SEP Topic III.5.a.Two Branch Lines Unacceptably Close & Will Be Rerouted

ML20132F408
Person / Time
Site:	La Crosse File:Dairyland Power Cooperative icon.png
Issue date:	07/26/1985
From:	Taylor J DAIRYLAND POWER COOPERATIVE
To:	Zwolinski J Office of Nuclear Reactor Regulation
References
TASK-03-05.A, TASK-3-5.A, TASK-RR LAC-11053, NUDOCS 8508020258
Download: ML20132F408 (11)

Text

- _ _

p.m 3

D DA/RYLAND h [k COOPERAT/VE

• P.O box 817 2615 EAST AV SOUTH LA CROSSE WISCONSIN 54601 (608) 788 4 000 Jtly 26,1985 In reply, please refer to LAC-11053 DOCKET NO. 50-409 U. S. Regulatory Commission Attn. Mr. John Zwolinski, Chief Operating Reactor Branch #5 Division of Nuclear Reactors Washington, DC 20555

SUBJECT:

DAIRYLAND POWER COOPERATIVE LA CROSSE BOILING WATER REACTOR (LACBWR)

SEP TOPIC III.S.A EFFECTS OF PIPE BREAK ON STRUCTURES, SYSTEMS AND COMPONENTS INSIDE CONTAIhMENT

REFERENCE:

(1) Telecon of December 19,1985/

Ilene McKenna to Christians Gentlemen:

Your request for additional information (Reference 1) on SEP Topic III.5.a. specifically, jet impingement effects on the HPCS suction line, has been reviewed. Enclosed is the evaluation of the worst case scenario for jet impingement on the HPCS suction line. During this evaluation, it was found that, although the HPCS suction line proper would not be adversely affected by any postulated jet inPingement, two branch lines attached to HPCS suction line are routed unacceptably close to the main steam line to shutdown condenser. These branches are the 2 inch line that supplies emergency makeup water to the seal injection system and the 2 inch line that provides for rejecting primary water from the purification system to the overhead storage tank. A steam jet induced failure in either of these pipes could cause water  ;

to be diverted from the HPCS system. DPC will prepare a facility change to l re-route the 2 branch lines to a- location thet will eliminate them as a potential problem. When this is accomplished,'the most limiting case i scenario appears to be a break in the high energy portion of the ACS line at the point of minista separation between ACS and HPCS. This is the scenario analyzed in the enclosure to this letter. By demonstrating that no adverse consequences can be expected for this most limiting case, jet impurgement concerns for other locations can be dispatched easily using geometrical or effects type arguments using the analyzed case as a basis.

8508020258 850726 I gDR ADOCK 05000409  !

PDR '

\

PCl-8 1. '

l

W---

Mr. John W. Zwolinski, Chief July 26, 1985 Operating Reactor Branch #5 LAC-Il053 If you have any questions, or if we can be of further assistance, please call.

Very truly yours, DAIRYLAND POWER COOPERATIVE WW://M James W. Taylor General Manager JWT: REC:sks Enclosure cc: James G.Keppler, Region III NRC Resident Inspector Walter Paulson, LACBWR Project Manager l

PCI-8 2

_ _ - _ . - __--- .. _ _ _ _ _ _ - _ _ _ _ _ - _ _ _ _ _ _ - _ _ _ _ _ _ _ _ - _ _ _ _ _ _ - _ = _ .- _ - _ - _ _ - _ _ _ - - - _ _ - - _ _ - - - - - _ - _ _ - _ - - _ _

i

(

EVALUATION OF JET IMPINGEMENT EFFECTS ON HPCS SUCTION LINE DUE TO BREAK IN ADJACENT ACS LINE ASSUMPTIONS a break occurs in tha high energy portion of the ACS line break occurs at powt of minimum separation between the two lines steam jet impinges directly on the HPCS line, i.e., the jet axis is normal to the pipe axis j

steady state thrust is considered for reactor pressure = 1265 psia.

drag coefficient C D

f r HPCS pipe = 1.5 jet load on pipe is considered to be a concentrated load a dynamic load factor of 2 is applied in the determination of load on the pipe to account for sudden loading.

4 RESULTS pipe thrust load on HPCS line - 2606 lbs.

maximum bending stress - 26.75 ksi allowable stress per ASME Code,Section III Subsection NB, for Level A Service Limits = 1.55,= 30 ksi therefore, stress from applied thrust less than allowable stress

( HPCS JET IMPINGEMENT THRUSTLOADS JET THRUST LOAD ON HIGH PRESSURE CORE SPRAY SUCTION LINE DUE TO BREAK IN /.CS LINE

1. STATEMENT OF PROBLEM -

Determine the load on the HPCS suction line due to jet impingement from a postulated break in the adjacent high energy section of the alternate core spray line.

2. ASSUMPTIONS -

2.1 One dimensional, steady-flow 2.2 Steam behaves as ideal gas with specific heat ration k = 1.3 2.3 Assumed break is a circular break with flow area = transverse flow area of ACS pipe.

(

2.4 Results steam jet is oriented such that it impinges directly on the HPCS line (axis of steam jet normal to axis of HPCS pipe.

2.5 The drag coefficient for the immersed pipe (cylinder) is conservatively taken to be CD = 1.5 (Perry's chem. engr. hdbk, 5th Edition, Page 5-62)

r m' ,. m

- .r p - - -

Ni} CLEAR ENERSY SM nPCS 'rPT -- ,CrucvT TVrd5 T- uv19[.

IMPirl(

( ..

. ST&bY- SmiC THtt/ST pogna t. ro Pu1NE'or BrE M Te As (Pa tf fc.

$h dere Aa* bAj( ov 4reA.

<P, pesee 4 k n d a r 3e a n."

V, ' avern$e velocAy acnz brsn$ openh 5 f = lensih R>& 5 Awes 7Fb STEnm , ASST /M/MG CHOKh^b FLOW ,

CRmCAt. EY/T V R OC/TT * $ = h R T' I

( r= Aa (' # )fs /

E-@

1 SincE CRdscAL Flow CowbrTwwS Risr RT CIT 4/j -

• /Po d I40 ey -(D 3

Co ne vin Eaus (D f, (D

>- m /

r -g' I=f,{4qI+]j/2l'd+g)___

T= L 2 (a P, A lusin k- D ) qQ vetociry v z y

F =- Sh Ay Eq . &

i m , es ,1,u,

• @ f3 !. 7 Q i' 4:".Tdfi.'*.,j'ff ,l'*:!g ;.*h;;f',4pf,t,'g ,'Rtj - r . , f a . 3 . . m. _. s . , .

NUCLE.AR ENERGY SERVICES - 4Ns 1ET /nP/NAFMOJ!" T717 us7;1,;j ,3, m I

( -- -_ -

1 Salv:,3 b g_b*

C.

, @ 9 tells -

18 , c r- vo Q be- Rs y

7 nr, as ms iaw k , ve v dca A3

,s 4L aca- sea %d era of +4.

54ea- jd 4& Aych 2 -

1

= s2 es = n+ y

. . p$c- 9c A j' Prs Af Sul3Eh,3 in 6.0 9

( '2-F- d '( P PS Ab'iA4 j3^P' Since. P:

3 P,[a /(k,) 4' M = /,3

. and T= 1.u na s 1

-- / febh eb g ~ .hh o g F= @ (.714 PA ) d or E tO 7=CL2 (.sq T ' s P2u AJ Aj 4

E y mokshin) kNIS krm 4 m a ct o u n h So r-

& lod b e i 5 3"A#'"I ^-

f 6P' icd r " Si" $

( L'., w h loal C a b o f 2 , rie  % ave  :  ;

F :.

z (fy2 )(.5v7 T ) g. gj.

e. @ -

=-

{

fif 5105 (2/ 74)

o NUCLEA2 ENERGY EERVICES #' '" '

PtPf4 ARRM/Ge1mr , ? arf 1At. PL4M AT 6L6"4 004 ['84 ~8" __. '.

._ 3 w cnmov w raca. vezet '

. coarFurtr$w w 'I TA 6x471*N

, '~',/ 3'# MfC5 $yCUDH

,e

• p- (," At.Y CofE SPRAf I

/'

/

'g '/ ).* w

(, ,, . ' #

N

(  %

9

6. b .

• m SEcrioN ' A - A" 4

A urs ios .

_ fj!!!(![b.h[ungk[If.h.h fhh.k5h[ b5}b !O-i hhika' kNd '

I

Ed ' Est naammiy 6--u ._ _ _ ._ _.. . -,e -. . . . . . . _ . . . .  ;

" M PCS W'T- tMf'1t36 F M 6 W T _T)) Kws,C LM.[, ;

NUCt.T.AR ENG40Y[ERVICES _

t

/ ms ,

( = ,

Ini M 3el <res = in a k k ,<v m e a m o f G'_'

sel,elule Ivo pipe = a l.u r 2 (A-S.I6%)

grger lac.tlhn, assam:n{lo*%ICql[

A A+

etpa nsu o n

/M;d #= '/ =Q.89<

-- L ii

_x t

--=____.7

/6.4

.',

• 5. IS 9 + 2(244), 2..2E Q4.3' = 2;

/4). d 4 r$e f ;_ 4 ,__._

L /097"

(

. 3." secs suction vue W/MMMA C I

' ~

g l fi e,c , wm w=2 -

vn a I

-Nf*n+(figs-){Qt.15',

F= M-QN. . .. k. .*.* j - ~..  %.....,,. . . , ,.

'7 _

9 4

O k

(

I NES 10$ gir74)

, .,,o., _

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

b M g ......a. _ , , , . ..- .. . . . . _

• llfE4 TI5f fMpiAnf#ff/Glir 7144rirsr- LaMnf NUCI. EAR ENEEtGY BERVICES -

- . ;. > 'i ';'y

• i 9- -* %r , s'

> I./ns,;

• T;t oglg'e ,4 ,. ,.

. - ' .~,; i y -- -

, 3. .

m'g, , .<f -

( s k.

1}

.c -R.EFEtENCES

?. . .1- -

i. . . y

. .y u:.

.,+ . . i s.; . . ,. 4,; v.c

. ri S: :,. " t.,'

' .; y :: .

c .

Y

[

IM hlARE6 ' Odh..; GM*!bA9D 26%6h/.l'NNM/j .

[F .A f-f o.

i>

.'7 "

4ECn04/

34.2.

i Wi EttYS h it.11t. EN$1NGEnt I; liANN$40t" . {

~$f EA:hf_hh; - O5 '. . . 't f. "$f. .[h.... .*fjf. .

(l.N2i

, , ~-

ve 3.' IkACbw9, TIPWC, "bRAwnJCgs

- r 4!- 5'o35/e3 l _L AI- Tonio -

,i

,e .

~

(M. 4. !jSRP 3, Mt+ (.see Rer..i.) w ye a: '~ ...

+

1

...p y f. {'

. d's. ,* ?, ; s. g 4.e g; .'9 .. ' g. .

, . , , .g , . . . . , , , , , ,, ,

0

. E e

0

• k

's

,n

.0 .. - . *

~

(

EFFECT OF ACS PIPE BREAK IN HPCS LINE STATEMENT OF THE PROBLEM:

At El. 693.5' in the Containment Building, the 3" HPCS line is 1" above the ACS line. A break in the ACS line at this location will induce a steam jet which causes a thrust load at mode 50 (in the attached model).

Configuration of the HPCS piping at the area of interest is attached. To simplify the analysis, HPCS line is assumed to be fixed at two ends, mode 10 and mode 80. Along the horizontal pipe, there is a support at mode 40, which supports the pipe in vertical and lateral directions. The steam jet will hit HPCS line at mode 50, which is 7' from the support.

Thrust load caused by the steam jet, estimated by Craig Finnan experienced a magnitude of 2,606 k. Effect of this thrust load on HPCS line is evaluated on next page.

nus.uuu4 ervesu v ctwwcto - - . - . .

n+ecT OY bc5 f ttC BRO K ou HPc5 Lt VE  !*t

-_._...3

( l

(

4.58' 7' J, 'Y

oo 1,

k Tg. r i

.g @ @ v 9g 4 4- @ g(, g ni j

\

s. .

4 I

% 9 ex I u- u

~

/

• r m e" g ~)" Sar Ao istE .

1 304 55 ' i

$= l.7M in'- l 10, So : Fid 5offWeM9, g }

no -p in waal(Y) % fdtd(E) d/rechen j

' Model we tua kg EIPEsp to se effect og i un,t- Imd. a.t wcJe @ l  !

tn ~vertilafhkdid ,'

( '

Erom putpt SGl.ootAC y wqg benSsq wemmt occatS ah mode Sb M = t7,dqq-16-in 217,699 k-in (  ;

.. Mu..}.cading Stiess cetted hp. ik ,

lod tk gide, [fC _

_j

.o = . - M= )7, 69 9 : to.266 k'Si I  !

9 17st -

l From atg Vimmt Mmfu j& cA[culahoh) p5S) bit +/pugt fgg., l li I

ak uccle so t9 : F - 2.6o6 k.  ; l i

, Ac1baljeding 5tterg at node 70 -. i i maw C- : 10 266 x 2.6o6 = 24,753 kg)  ! j i Adowalle Strerr- 15 5 : 1,5'xio ksi : 3 0 k(l i 0: 2.6.753 k5i < 3e ks' OK s ..,,2,u, . . . .

1 l

.t. A- .