ML19256E001
| ML19256E001 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 10/23/1979 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | Rubenstein L Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7910250278 | |
| Download: ML19256E001 (1) | |
Text
{{#Wiki_filter:. e TENNESSEE VALLEY AUTHORITY CH ATT ANOOG A. T ENNELSCE 374: 400 Chestnut Street Tower 11 October 23, 1979 Director of Nuclear Reactor Regulation Attention: Mr. L. S. Rubenstein, Acting Chief Light Water Reactors Branch No. 4 Division of Project Management U.S. % clear Regulatory Commission Washing?on, DC 20555
Dear Mr. Rubenstein:
In the Matter of the Application of ) Docket Nos. 50-327 Tennessee Valley Authority ) 50-328 Enclosed are forty copies of a report titled " Preliminary Results of Sequoyah-1 Internals Vibration Measurement Program." This information is forwarded for your review in accordance with Regulatory Guide 1.20,
" Comprehensive Vibration Assessment Program for Reactor Internals During Preoperational and Initial Startup Testing."
Very truly yours, TENNESSEE VALLEY AUTHORITY k i s.a L. M. Mills, Manager Nuclear Regulation and Safety Enclosure (40) i Yo \\ 1210 191 7910250 3 4 An E c ." 0:f or * 'E-: , G{
) PRELIMIllARY RESULTS OF SEQUOYAH-1 INTERNALS VIBRATION
- MEASUREMENT PROGRAM
~
~
~
?00RDl1GINAL 6
The UHI upper internals prototype vibration measurement program is described in Reference 1. Data for this program were obtained from strain gages mounted on upper support columns and guide tubes during hot functional testing of the Sequoyah-1 plant. From a preliminary analysis of these data it is concluded that the upper internals have adequate factors of safety against flow induced vibrations.* Data were acquired at five coolant temperature plateaus with four reactor coolant pumps (RCP) in operation, at four coolant temperature plateaus with several combinations of three, two, and one RCP in operation and during pump start-up and shutdown transients. The near zero to 1000 Hz strain levels for nominal reactor conditions (approxi-mately 545 F and 2250 psi) were less than [6pc rms]b,c for guide tube strain gage signals and less than [5pc rms]b,c for strain gages mounted on support columns. , The frequency content of signals frca lower guide tube strain gages is shown in Figure 1. The response corsists of broadband random strains that have the highest levels near zero frequency, narrowband random signals centered on the guice tube natural frequencies, and nearly sinusoidal RCP-speed related cocp rents. The rajor RCP-speed related responses are at 19.8 Hz (rotating speed) and at 277 Hz (second harmonic of the blade passing frequency). The 277 H: component will be discussed further, later in this report. A summary of the response characteristics of the lower guide tube is shown in Table 1. The first beam mode natural frequency is 71-75 Hz in the 0*-180
. 1210 192
. 9
-- EY Shh ,_
-e --
-..Q,4 ' ** * " ' 11 ',"f $*[ f l *,
,, y 5 -p * ' ;/;* , 9 p% 4 erM y J w ;
~- .
,__...=........._.._.._-.__.._...._(..._-.1..__...._;_,_....a.g.~., . .
.l. .,. l ,. . .. .
,.g.
-. ,. l . ,. ..
- i. . ...
_ . . . _ . . . . _.,._._.i.....__._ .._._,.
- 1 h- . : t: :l: .i. I~. ' r.y .-t w 1l.'. -
..i. l l
} . ... . !
..g,;
..... i . ,. .,. mee m:
, .. 2xamwxcx__._Q,. 1
;T .l
. o -M. :. ,. J:
y _ _ . :. . . ,.
,1
_..g_.___',_.. f.13p't-
. g .. .
.l '
....__,_:......_.i__.,_...._....l
.]
._.__ _ __ , f }3 s
- l s - - . .
. j. .!-
.:. -l .
l
. .A Aor.er4SAcwl, i - ~ :!' . -
.l. .
_;.L g)lpg yl aydl - .
- ._ : :I :i- .l l. gre m e ove .!: I Ir!- !- i
- )- . I _ _ __: ! ._;L _.,._.._
,/. -.!:__ - l_ ..N. Eseb.. ass! . : ! .1
-. .y . ,
, -' (
.-i.
- l' t. .j .. . . .. .
1./%g::: t__i* l ..l .-j____;__. . l- . . s _ _ _ . _ . . . ____ ____l (: . - .--
- i: 1 ..' . : :.
f._ ,_ _. j . Y.M 4.:ig...__.!t-1:, __\._.._.....:i ..:_;.;. _ _ .i
~
,(V.4
. s. .
f.
.}'
.1 : !. .
. i. :l,. 1. "I .i:.,. y. !-- '. . t ;
.. .: 1 l i n:.. . . . . . ; .
._ .:.a_x- : . .\:. % jJ... _ . _ ::._ . . .._x _. . _. . - :_. t--
l: 'j. 1 -! : l: .!: .
. W~-
' :!j.
,/ J' i :_..
- [.
_ l _ . _. _. j -.
.l , i ':I.,.-l; . il i.l O so to 3a 40 .So t. o ** go yo '
go sou + fx!.egwM:7 (f/t.)
.p .. .._.y- . . _ . _ _ . _ . ~
.. ., .. t_ ,. . 1. .
i ..
.J. !' 'l~. _ r___ . l' , .i: l - I
- .:l- :I: [. .. .; l . .
, _ , ," " : 3 ." .. !
- . . - - 1: :- r
.j- ._I: ..l---
- i. . _ . + ._. __.L _ _ _.}_.._. s
. . _ ._l . '
- _ . . . _ _.* ._1. .
! n I: r } .q tr.
- : d_. .-l : . i- .
1 ,
=)l . - . _ . .
i
..=. lj . p_
7l .I
._ L ._
[ ,g , y. 1
. = r.
q
>_... ;._ _. ___ q ; c_ p _._..q____ _ _. ;
- -- ___ :_;_.. .7...L_,.!c._.
-. :l: :l- l; ;;;j:.. : . :. . :_ _' u :~r n g _' g _._ .__ ! -
.i... ..
.- .. . 4 .. .
_: y _- {__- : _ _ :g,9.,
~.
l j; ' tuor mssms raqus,q. _. :l:.i:3 .:;n p ..U 6 :
. ?- - - . ... - :. .. ....
{,
'N '
jl.
. : . .. . - 1. Z_. . j. - II l f._-
j.{ .]:; gj '. {' ._ I. : I . :n. . . n *
- . 4 :$: -" '1-
.l.-l:..
n: .. . . .i ..I :- l : - l . , ~. l . ' '
- " q-* l* I ; ;.W j.d.
5.: f' n
.. ., -- -4 t
., ., . . 3. ..
3 .. . . _3
.i .: I' , r/ fMAl ' ;-' - ,l. ,
L,. : .i. I ._.a... ._ l _;. .. '.f. tNEMl_eyf__').L., __ _.2 , l ,,;i_- 3._.....
- . .2. g: .;. .i &, s j j1e
.[.
a. l u
... j.
s i
\
.l... n . l.
.l
...;. .. ....: ;I,,...p ,.A,t,,; i i-4 o roo z.co 30o ec o .wo w gn g,n, yn p ,,
,- m P00R ORGM .
hw.<n.mem 9 era a dowm gwoe ms J s+xdGm r &wnL > ff W.s/ 5.39 "fi R6ms1 ' 3210 195 .
.,<.=.*,.w,. M2.
..=g*.% ,
.g s av .g . ..c. .g r*g -t % e*au . g g %W W M *.E "MT
Table 1 SUMM/sRY OF RESULTS FROM PRELIMINARY DATA ANALYSIS-- ,
- b ,c-RMS Amplitude Damping [2]-
i 1st Mode Min. Factor of
- Component Core .datural Frecuency (in. x 103)g)) (% C/Cc ) Safe y (4 Pumps)
Location . Direction in~TRE)' Lew 7rea.Hst Moce__ _ _ _ _ m. _ q O 0 -180 71-72 1.3-5.9 6.7[3] c Lower Guide Tube M-2 .34 .22 1.5 4.2 3.2 E43 N 90 -270 65-66 . _ _ _ _ _ _ _ _ _ _ _ .. .___________ _______ 1.3-1.7 10.3 y Lower Guide Tube K-2 0 -180 74-75 .24 .20 _ 5.3g43 CT3 90 -270 65-66 1.2_4.1
.41 0.6 1.3 12.6 ,3,::=
Upper Guide Tube M_2 33-39 .05 P ___________________ l________ ______ .. ._______ 100-150 .10 .19 0.3-1.0 8.7[5] 5 i.nch Upper K-1 Support Column .___________________ 100-150 .18 .48 0.3-0.6 8.2[5] 4 inch Upper N-2 Support Column .
- EI3 Square root of the sum of the squares of the ampi.itudes in two perpendicular directions, fcur pumps in operation, full temperature.
j N [23From various temperature and pump operation ccmbinations. .
- e [3]At fatigue test failure point.
'[4]For locations at which failure did not occur in the fatigue ' test.
l t [5]To design allowable stress levels.. ' 9/1979
l l direction and 65-66 Hz in the 90 -270 direction. This difference is consistent with previous test results and is due to unequal support stiffnesses along these ' axes at the lower end of the guide tube. - The damping of the lower guide tubes inferred from the bandwidth at the first mode natural frequency for several plant conditions is 1.2 to 5.9 percent of critical damping, Four pump, hot vibration amplitudes are approximately [0.0002]D'"' inches ras for this mode. Factors of safety for the lower guide tubes for four pumps in operation, 548 F (see Table i), have been determined using the data acquired at Sequoyah-1 and As expected, the guide tube fatigue test results reported in Pcference 1. higher responses were measured on the guide tube at coce location M-2 than on the guide tube at core location K-2. For the guide tube at core location M-2, the factor of safety to failure at the failure point of the fatigue test is 6.7. . To determine the factor o safety at other locations on the guide tube at which there was no failure during the fatigue test, the procedure was as follows:
- 1. The moment distribution, shear, and end forces of the guide tube were calculated for the mode shape and maximum vibration amplitude of the fatigue test.
- 2. The moment distribution, shear, and end forces for the guide tubes instrumented at Sequoyah-1 were calculated from response levels and made shapes indicated by the hot functional strain data.
- 3. A factor of safety at key locations was determined by forming the ratio of the moment or force determined from the fatigue test data (extrapolated to plant lifetime) to the corresponding moment or force determined from the hot functional data This precedure is conservative from the standpoint that it assumas that failure was inminent at all locations analyzed.
1210 193 -
/ .
With this approach, the minimum factor of safety for the four pump, 548*F case is 3.2. Factors of safety for other cases reviewed are higher than those given algove. . , Spectra typical of signals from upper guide tube strain gages are shown in Figure 2. The spectra show that the major response of this component is in cantilever beim modes. Since the upper guide tube is essentially an axisym-metric structJrc, several modes occur between 33 and 39 Hz. The flow velocities anund the upper guide tube are icw resulting in low vibratory amplitudes JPJ.00005 inches rms)]b,c , low damping (approximately one percent), a'nd a high factor of safety (12.6 to an allowable stress of 16,300 psi). Signals from upper support column strain gages -(Figure 3) indicate broadband random responses, narrowband random responses centered on structural natural frequencies, and RCP-speed related responses. The major res,,onse is the low frequency (near zero to 50 Hz) random response. Narrowband responses at
.,tructural natural frequencies are in the 100 to 150 Hz frequency band.
Results of mechanical-dynamic testing carried out on the upper internals at Sequoyah-1 prior to hot functional testing show that the support column deflection shape in these modes is that of the [first mode of a beam with nearly clampad ends].b,c As shown on Table 1, the damping of the upper support columns is 0.3 to 1.0 percer.t of critical damping for the small vibratory amplitudes (approximately
'[0.0005]b,c inches ras) of-the support columns.
~
The factor of safety of support columns has been calculated usir.c allowable , stress levels given in Reference 1. The minimum factor of safety has been determined to be approximately 8 to these allcuable levels for 548 F, four RCP cperation. For other temperature and pump combinations, support column strain levels are lower so that higher factors of safety will result. The RCP induced frequency comoonent at 277 Hz (which has been detected in all previous plar.t data) has a significant invel in the lower guide tube response and, to a lesser extent, in the support column response. The levels of this 1210 i96
- = . = _ . _ ._. _ . _ . , _ _ . _..;
1
._,-),. . ....y_..
i' ~8 l i _i l 8
.. . . i. . .
, 9
.l . ..,
...- l. . .. r..-
. .. 8
...I.... . . _ , . .. . . . . . .
.l
, 1. 6 .
g'....
. i
'I
~- .-
l . . . . .
. ?_.. _.............;...,...'..t.. . . . , ,' , .
. e ,
. . +. .
.v -
l . 4 . a --...
..e t _ . . . ..); . - , .9fA . f. Lo,' .t n ; ,
b i . i r )
.:.E .. . ._I. - .: _. ... _ _ . .-
I aGw6 az zt.W.ddyM.: _ _. \ . __._x. '.: ..) _... .: b ,. se,se .#aa r.u_: : i a : _..i.... ...l......_ , l /KGGWNCASS . I .
. l ._*
\
....l.s .
l.
.[.
.s.
n
. ... - y. .
I . , ; i i l- .
' I :l: i i
. .. .._._ _.._I . . . _ . . . .
ti :' 8 y.Q,w W syv6 ye/ , .: ;
~ ~j 8 .. .
.I
}
8
. . ' . . . ._..i .....
~ #0/T6 .
.l. .l. .'.
...[_......l. ..li' ';.'
.cfg/ d g/ w/;7M-)
i : !. .i .i. ll .. I , ., j .I ,
._.. .. ,. _.sf4.EO_ . . . i . . - . . ,
.l.
s_ .. . e.4. . g. .. .. _. 4 91 l 8 l....l- -k :: -
.l: I
...._.}
.p _ . . . .. ._. _ .. ,.
' - j j dii___k
' h. _. . . .^_
._ c .._. s d ..O.J._. i e - _..,.. ;'Li-90 13 0
" M Bo H.s so da gp 90
- /,c-cp.5 acy (pa)
=--~w-
. (. -, :. . . . < _ .
_7_
. - . " .-..-.--s-_.. . - --... ~
['- 6 1
.l
; g 3,
i i
.j l - -l- -
i*- . l
.,J-~ ;
'-~ , !-- .
g i , . . . ! .. i .I ..
- a. ..
_l_.,..__.l._._.__..._.._......_... i .
'.. .. , _ . . ) .. g
. :. . . I,l
- j. :l.l I
1 !- 1 l' I. .l t
-6 i .
. . 1. .. i
._.l.
- .i_.. -.; - . .. . j.. . ,
I. .
. , .y
- _ [ ._
.g.. ..l. . _ _ . .e...
t
.l i : .!
.l !'. .I .
.. i' 1: I l .,
I .- 1 .
;.__.._.I_._........_....-....,.u.
1 . .
. l t !.
. r.
^; : I .
. 'l:
- .i i
. l _.
.l. .
l e _ _ a; .e.-
. -l - _ .
-_ . _ . : . . J ' .'! j
- .l.. .l. .y 1 . :I.j . : l:.g.... ..
~'i ..1
...-o_...
..g , . ,...
.l.
l kl a........-
/dWAW/C c'/~N/y .
~
'_..'.... ' ,.- ; j j . ' _. . d
- - ' - * :.-[=,.
,' j a.
. ,Il. --. ..&
SMcent.oMQ mqmucr. . --
;.:..' . .: :I: iJ .
- "i ~~ j ' l.
M " ".' ..'..!'.'-
. !, . l. !-
l - rhv_t i yttjf,e 4&p]yead>', -
.J i "D- 7
-,.l. :
.j; ... ... ..
3,
.i
; .l.
. ... ---Ti _. ' ~I..
i_ . . . . . . . . . . .
.....).-....-.-
!. .l.
,. 1 . . l .,
..T....,._.._ ._ .
). l ;. .....I......$_
- l. .. i I
t
- h. -i-L .l M;*;
11 .l. ; '
. __ m Q ..... A,.h t
__6
- I/ h,D. _ . . ~ _m . . . - [s . f ' ' . ~ . . . MC .
M Y
$O Sco (OO ]D) g.30 e l00 y to C ,1no
}~~ca;&Edcy f//2)
I!NE AR /ks-@ E Mcy .{PECW) 0.C MI hYCo h /O6 kBG d freekG/e;e.25km,. Mmi .& B7Y news 2 - P00RBRGNM .---.--....-.~..m,, _ .
,,_,,,,..q..,
-1 um , .. .s u.., __.ma.._--
e p.
.7..
..,....e_--..;,__ ..... 9..._
... n._...
. . . . . . . .._w.
.....,J7_,
- p. . .
p
... , f_..r- . , . _ , .- A'.p 8-r._.
.d. l, L. .. .g -4.
3 m t.... . .
._...l... ...,.:.._
- 4. . . _ . ._
L.L.p 4 . ...i....a , . . . . . . ...
. , _ . . ._ .. , a . .
vg> ~..
. . _ ; _. ._ . b . . . p _. . . m . --,
L.D..
- d. r*- ...'e....-.*
__p._
- -- i . - ---
----a- ---'ee- ' -
. .-t- ..-.,-
L~. a..
. _. ; I :-- 2 3, . "-.".
, _ . L. . ..
,- . H.. . ,....I .
J ..a. .&.. . . _,_ D C. ____.4.._.I-.,
..;... i . ., u.
...a__ _..._._.,.I._._,
- a. ..._.
.__.g.
4_ : . .. _ .
.e_ L. _.t. ... .._
[
... . . .uQ.. ,& . _...--
.,.. _ . . .1..
s.- y.. y}-4,_._ r... . _
-,.s. ,.y~ .y. an, y,,eY:
7.
. . s__
.a ._
% }CS 1 , -
. . . /. #
...l......~..
s_ _ _ . . .._.g.... '_.... .e a / M._.. . _ . . -
._ . l . . . _ . . . .
..4 ,,_
. .., j./ f c..g. ., ,.___
.(g. ....
. N. . _ . . .. . . . . . , . . , . .. .._.
a 7.I . ; _. gj . ., 9...... . . _ .
. ._ _ , e. . .y _ . . _ . . . a . ._ _ 4 . . ,
. g.gg .. . _ ..l ,.. . .. . . ...e ...g _. _. _ _ . . . . . . . . _ . ..,_.
.____..r._. . . . _ ..l...
6 _.
. . . ......_.a.._. ...
.. . . _ . . . , . _ .p. ., e . .
.nu-4
+p .%, n, ~. .. . . .
- 0 E
_1 , a-I~.~*r ---i-l...- _ . _ . . . - . . . - . . _.s.. -
~_.
-_. m4,4,IsW.
.,C4. _
..._._..e... . .. ___-
- -t s .>......
_- V_- u
'.f,..~_........
. . , , . . , \. .__ ...i ..- . .
...,-m _. _..y., g... ,
, p. . . l ._ . . _._ _ . .. .' . ..._.1,__...
p,
.g. ..
. - . . .g. .. ..
_ pr g,.n_ ._ .. ggj . . ,
, .. ~. ..
3, ._
.r.fy gg.y, . .
y_
.. p. . ..f +_ . . .. _ _ . .
e..... i e . . 3,..__.g.__...........{_~
.__g...... .- _ ... .
r
.__.{..
.m.
.- ._l_... ,-.
.Wt._s...] ._.
c_. y.-.. . .. .. . . p - - 4 I . _- b = h. . .t -c-
- ,. -.---q
**-..~_.~.-l..-F.,-~ __. . ' ... *. _ . . _ _ . - =
"...~.--
., _ . - _-r.
i
- p. _ . . 42 g. ,,.. F_. ..-,._.._.
- f. 8 8 -
[4. . s. ,.. .s)s ._
. . _ _ . _. I . . . p. . - . ._-..
._.....;..._ ., . , .. . _ . . _. . _ _. a. . . . t . ... .
-s. y
.L ._, .
_- 5 _. [j. - - 4.JA .._ . I a ;.
.p..u
_a
..-h ,. 7.pe ,_...
. o,.i..
.d.. . L. , , . . . . . . , .
.t.... _...L.... .
.-7..' .ra .a....,
. .i
._t,. a , .I.
. ... 5 . . . ..s. . _ . .
- _ p_. -. .
[.4_ i . . _:. . .,-. 26 p f.,.. .n .
.q i ' '. .". '-
] _ .C ..p u,i+. S.;. y a r, .l.a.. . . . .. - - .
. . r, -_
c.9.__:i,,.
~d_*
j;. t . . _ . .. . t . hv- ~i '
'.? ' .
.. .q .1 . . . _ _ y _'.. . t . . - t
. .t . ..'.. . " g"...l.- -{..v,_.; ; e ._ ; ... g g ....,.,
.. .. l ..
gy. .. 12 0 tw /W Go y o go 40 to w /w
/%dq.w vCy.Y
_w., , u.m - _ - -m=.=- e ===n=_> '
+w
. - .F., . .=, . ., p_ _ , _ - t, .. ,.
_p.m._ , u _ _ J'__. - p __ _w__..___..d__..._...r.._. ._
- k. J _. _ -,- e., , f-_.r;-rr.
u. y .L. . .. _.
. 2.__ o
.__.:.__.. L.__.._a
._t_ . . _
_. J._._y..__ _._ -__ _ L.-.._. 1
.__J_,._~._____.._
_ . _i _. -
,-. ~.-
, -a-
.-p___>___i.
_ _. .I ...__ .,_ _- - _ _ .m __
.7 _ >_. '
~ . . . *~,____4._.".4*-'
.u-_
yfsa ~. .. ._ y. m.. 4_.
. _ ,, ____ L__
p__ _ _.t,...~._.
......_._,2.... . e, , . -- _t+E L- u.
i
.__r_.__t u.._ .____. .
._._.___.._r___.__ ; _ .. , _ _ . . + _ _ .. ._.
.....___6___..f.-___.q____:......
.. g ,,,-..- ..-._n_.-*-? 7,e.r_i -
tr wi . I {i.L .. ..
.,_. ___ .g.~..- .. ..
- g. p__ q. _ .. .__.____.-.._..g.-_.g,~_
t .,__. _ _ . ._ . . . m._ ; .
.___p._...... *
, a . _r _ u-r---
r-- - . .r. . 4._,f..-
%r_7_ ,.. ._. . j _ ..__. , , . . ._
y,p .
. . - _ 1. .. . ga . _ ,
y2 )._ _ . . __-.,L._.. _p.... ._
- f. . . . ..- ..y y l,z. y.. _
.t._ .. h . i.... ....~.
, .. , w_ . -l.. . .
.t a ..6._.a._ . . ... y 4.y+. .-
_ t.A.
- - ..n.g"q. <... __r
.p_.
___L._ ..,n__. c , _
- '. .D m... . . eg. ,y rp . <f . .
},
..-,~__.s___..-
..-p,4 N. .. _. .. - . -
- . .L.__ . . _ -2 , .ag ~~. ;p_- q .
- p. - _q
. n._u_ . - im f_XX. CDT;*.CZ',.*.*. ~.' . 5 m. . .. g. .&. ._. ,. . _i '.*:.."'_.1. j% j- _ _. L_4-wtu
- 6. a. .
._...-,_a_
a /.,,. ,+c_ _ __ m:.
,_.-_.4._ t _- ,.. . _._.6
. . L__.,.. .,g
,. p. _ . . . .
%_ _ m a .
r p--
._..__..-{.-*--r
_- ., r . -tr -rr rE aac & . ___.__._..._..._. _ . _ -u. .[.._.____ I, _1._. e. _,2..___r._ ,
. us
. .. q _, s ._ _ _ m. L,.__ _ v .__ ..a.,_-.. ..
.._ .J. . : p._ ...
_~r_.~.._ >~ ~j -;\~~ I g* _ i . .. . L.___
, %. J .. ._. .. i . _._tr..
. - ,_ . ! . . _.>.. .- ._..s_-,..... i.t..._._.. . 4._- --- ). .._
_ _ ., . f.-,n._..,t _ . L, _ .u_w : =__ d --- . _.i._.a. p: . =..a...1 =, - .. t _ .-g
.--._,_j..__.-.r,.-_... ._ . _ _ __....7..,,_._...
'..m. ._. . - , , , , #.
__ ,.: ..a y__7
. , .. 3.,
w _i .__i j., _ [ , ._ l
.L
,._....._..(.__
..u . 5___ .
[' J . .n._. . g . _ . . ___ w. t . . ._g. .-.
- o. 6 ,_
p.c.-_ g.~n
.. g .__ .___i .. __.i,--_._... g, .._ t
,_ _ _.,i...
a_. li. g . .a_ > .__.7 __._> u. _ m E.u I-
. ._. . . _. g__,. . . - . .__
g.._ _.._a..__ _..__i ;
._+ t, ,_. A m. ,.,._ M aw o ..u F, T*-
. L.. i , . .
,_____L. __p.....
_._.....s
.... __p_. -% w
.__.La , _.
_ _ - _....p.._. p_..l.___.l.._ a u_ A..a ...,_
......i.
.,u... .a.
,____.,v______ . _ _. _.__ _ ~ _ . . . __ . _ _ _ , __g ._i_ _ _. n_
Ii _. l,-_.... , . . _ m._ a _ _. . . .._..)....
..._.J...,. .m.__._
. . . 7 u.
._i. li ., .. .._i__,.__. _ . _ . . . .
._ ._ p_ ... a. i. L.y
' . . . ....a.. , .m..
.. _ ...l
. , . . . .b.. ; ,
_ ..4 . ._ _ _
...e.._.
. _. .. . . i . b _. . ,__.. .. ...
. . i. .).
_ ___.,.... . . .._,l2._a p.n.,
..,... - u_~_.
- .u _p a ;[u , .
- t. , i
., . .f% L . - - e
... i -
._ .q .i._...%...'.
7co Sw Wo Ico am Sw o tw 2m % No.) R?squriocy (H2)
.%./
a GLonwSawGmwsc% q %s,SM0F
" ~
P00R BR8M
frequency component are temperature dependent with the highest levels occurring in data taken at 539 F and 548 F. These maximum levels, which are included in the' computation of the safety factors shown on Table 1, correspond to a maximum
~
vibration amplitude of [0.00032 inches]b,c res. Previously, data have shown that internals responses due to this frequency component are generally reduced by the addition of the core and drive lines.. In conclusion, the preliminary analysis of the hot functional data show random responses and natural frequencies that are in good agreement with expected resul ts . Factors of safety are acceptable for the life of the plant. . As done for other plants in the past, further guide tube data will be acquired during the initial heat-up. These measurements with the core and drive lines in place will provide further information on vibration respenses of guide tubes. l References
- 1. WCAP-8516-P (and WCAP-8517, non-proprietary), "UHI Plant Internals Vibration Measurement Prcgram and Pre- and Post-Hot Functional Examinations," C. N. Bloyd, H. R. Singleton, March 1975.
- E g .}}