Text

Procedure EP 1202.29 Pressurizer Sys Failure
	ML20024C588
Person / Time
Site:	Crane, Davis Besse
Issue date:	05/03/1974
From:	Cherry J; TOLEDO EDISON CO.
To:	;
References
	TASK-02, TASK-2, TASK-GB EP-1202.29, GPU-2015, NUDOCS 8307120845
	Download: ML20024C588 (17)
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~ ~@!?%t tic reliaf, 3C2A, does not operate when it should.

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?

fallowing'semputer point. alarms any be actuatad 3LY 002 ' DIP

at 200*F.

n., m.... ;;.

'ah"S'quC3TKLYL*at11'98

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?.i-Wc

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.s,w;is::.g :,qEETE *tI3tF" at 200*F

' #.82522.

l Waaaame4arae alara "FRZ1 QN2 TK LvL HI" at 8'9" r,

nf2;.;-QJc' ' Y ~-

k-lL4.f,Vuemani.ve'Esaster Coolant makaup flow I

. W6;,:.%*.'., il*T.*

' a - 4a.Astians

'Ev e '.sYf,.. ".Y.:,.

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t===Ji=*= Operator Actica 3 ?df,i.

.1;,Close the slactromagnetic relief block valve, RC-11.

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terions 'a' laak rata data =i==riaa of the RCS per ST 5064.70,

~2sakasm.Eurveillance Test.

T. .V.' C '. -

hnr?.that';ths.elastramagnetis Ialiaf block valve, 3C11, ia hk.f: ~

. M $ foreAmesmandrT temperature on the electromagnetic relisi s:.,(.:...,:.i 773).

J 2C veas handae (computar point

~Coolame'8ystaa laakass shall be limited to 10 Grx mv.12AEACE during 70blIR OPERAT108, STAR 2UF, BOT STANDET

- ~~

--m

,f1532.83E!!DGal. With any RCS identified laakass greatar than

redaca the laakage rate to within limits within four housa'er be in C01D SEUEDOWE trithin the next 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.

Y[

' a Work Order for the regiair of the faulty valve.

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'V7,'.,,,7 ;, 3025: The===4=== allowable Quech Tank temperature is 350*F.

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mise!to opezata ~asy be caused by a loss of pilot actuator

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Qaast' e nskr. 430), binding of the valve or actuator or

.&c.W,%,,therpilacaatuacN.

G-smay.-M;eaused by a failure of the valve to ressat properly or

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_===tia re11af opens at 2255 peig and closas at 2205 peig.

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_ _ v% quanch tank high 2avel alarm is at 3 it. 9 in. and the M%'*--~'ars, alara fa at 200 F.

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u%V..'s%ve discharge high temperature alara is at 200*F.

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'saolant makaup flow is indicated on FT NU31 (Iow ranze) or

.0Ligh range) makeup flow matar on control room panel C5703.

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' alarm "2Iza quca 2K LE RI" at 8'9".

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ww ~ T4, 4 ive reactor ecolant makaup flow.

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-a laak,zata datazmin= tion of the Ecs per ST 5064.70,

%s.,,. - Serv =411==e= Tast.

. a e.

shall be "-**M to 10 GPM ZZEITIFIED LEAXAGE during

~----j'emN.;32ARIUP, M STANDET and B3T SEUTDOWN. With any 2ankass greater than 10 GPM, reduce the leakage rate

'limite withis four hours or be in CDG SSU:DOWN within man ( 36 house.

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a Ta Uszk Order for the repair of the 9-' 4== code relief valve.

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luar invdoensmiant to' be inoperative, the ' reactor

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'1 eto sesgly 'with Tech. 8pec.' 3.1.1.3.

7 W

.high camparature alarm is at 20087.

-^ P k.q;uench, tank.high level alarm is it 8 ft. 9 in.

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ggr ;----*MQuanski,. Tank' high temperature alarm is at 200'F.

f

' - Iklow'is !~H--*M on FT NU31 (low range) or

) makeup flow matar on control room panel C5703.

rx wM,. 4' eg.8 pie E*11st;walves open at 2500 peig and close at 2450 pois

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%%Q_Qc-Q.4alvm31s :9l ret!* whea it should be closed.

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1l m

m.

k:. 5 % W & M 5 Q f b';'V.i.':

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'taczasses to 2255 peig, the Electromagnetic fl l'

C.l~~ - ; 4 SC' 2A) will op**.

f Wgg

~

are decreases to 2135 peig, Easter Bank f2 N

at,2 pe Esac Ram k 3 comes os and at 2105 peig l,

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+. _ _.

3,j,,,,

LR W

. s-l

r@:.g:a. '. Opes:. ttempt to close the Spray Valve i

, ~.

l 3 _

i

.-gl41 unable to close the Spray Valw mesually, c b,.'j ;..

., i.m.a.Zeelatica valu EC 10.

l

}.

to normat

=

,(Eassas,psmesurinerhastarsreturaE.C.passaurs c} r.w'Claced

. =

R

"~ M.?..

.'open the sycay valve using the Control Room switch.

R-

=rit= plaat at steady stata conditima and operate the 7,q il 31 ant asitE cauttaa.

2.5.hCr.

e !%.'t'. :.

,... Opem-

(

.p...y,Caatsel pressuriser syssy manually with the Spray Line Iso-J:- 'Istian valve, BC 10.

l Zeese a Besk Order to determias and correct the failure.

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.B.

f 1.

I

.3.4.1* Failed Claced If plant peuer chsmssa aus sacassary, ma t

3

..i.

.h '

A.

aar Sysay Valve sypass).

Centzel ECS Pressure by the operation of the pressurd

+=e

?...i D ;. / ~-

C.

3.

h i sfh l

=

hasters.

Issus a Mark Order to datermine and corre 4

I

3t.

C.

m

- - - - - - ~. -..

'~

l 5..

l.

-[gg ~M'tMAshfpray.'va{'lva can result from a valve moto

,.i tadias',.a;eostrol' contact fault, or loss of power to ths MC-t

mgi,

--L

,,x.toiths.vahs,setor is supplied from 3CC-F21-A with

/

M@ m -

,g sp;g....':~

i grisar Spray Valw Bypass) ta manually operated inside the

'g "

-1,

-5 =.ths'.640.ft.. law l.

Opezata RC 262 as necessary to maintain

_ Z,._ t,W,diffarseca bartesa spray tamperatura (Cr?-r Point

~

m

_, ~ %,Mt.sansan..ciaar.'stamparatstas (Computer Points T-776 and T-777)

-1

.g ; *. s :~' i..

t s.-..

2.

T-gf

.'ititaInnessaary to opera $a RC 262 as necessary to maintain 3

!100'.*pga.borea.differsace betwena.the pressuriser sad the RCS.

' GY'

. ~

3,hi + - -M==* spray valve opens at 2205 psig and closes at 2155 pais.

prisar. spray valve fails "as is" os a loss of motor operator

penset.'i/*E. /.I' u j; : r.

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Fi H 5 W W'"

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cp w _-e m_{*mmm-S t.

.i i

bank, control. room switch fails to indicate W for

"'PssssuasibeLaw astpoint.

Q&.t:U.

l e

.E.C. pi: essure response when beaters are energized.

-n.e.< - {iN}. j,f..n i*:.. *.

f ineguential hastar bank will energina as 1.C. prassure j

__c_- _ge__ _

.n.- m. -

,y, y

=.

~

QiR'.-f.e...

..m y}he.a*4:%%.'i a

- '^

93. pggesuge cOSEr01 system, Operate the affSCtad

- J

@l g..,.. hank usamm117

.... v.n..

k l h

,Q.'.J. &

~*

-,*?+

f 48aamuser ytant with caution when heaters have been placed out g;Kassvies,eheervingR.C. pressure.

=:=n-,

i a % Grdar to datazmine and repair the fault.

~

1-$-'11y inelata defective beaters.

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^"-

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W.

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.a.

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AM.

. ",.iWh 41smattz btedlas'.". Ons group"of:9 heatars is '

w -

Ja*u

!C- '"7'NMt@p,Mteppissauriser heat.ar banks of 56 hastars pegasume7sontrol during plant transiasta. A heater i]EE ry]L%--

- wa%s7;sybued when 19-20 heater *! aments are not functional.

C r"'*~${Wient.*.'.< zes possa is diwinished.E;a arentar lou of heaters will not cama a jmi DRE t

,-M

. The absoluta mini-

~

-. :,--=== tota 3. heater aapacity of 126 EW aust be maintatas4 to

'l k

' 'stata;.plaat operation. This capacity is equiva2 sat

, beak;to ocsynasate for normal heat lessoa and ayray

+

' f.','.*.. ' z;';

I N ' -*

control schens is se follt.w f

e, n _

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. U.l'?..U?

Y P

- ',.1fg if,,

sca contrated

'N p"

n, ui f

sy;'.N 2135 pe2g

. 2155 psf.31. - ~ 20s.

- * * ~ -

g.j';%' ;* 4. !. '

~~

3-2120 psis-s 2140 psis

' s504

. f...

2105 psit '- N 2125 pais 504 s

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.,.MM* p^74=d9-*4 ; from all three' apaors, as indicated by'128 FC 14 es? " 2l('j. :

.M i1 ih !

..,W.gM antars 0.Z E14-3 and LZ RC '14 4 on ge hWC57C4) or.all three camputer 4~'4--* ions

'l.

ca gr __ _ m - -- - -

. disagrees by more than 7 inches.

O y.

(,*4. : i.,..

WM

a-A --Mh.a'dications on the remota 4~8<- t> r when san-m r._, ---*"* disagrees with the compensated indicatico by J.sy..

s%wsi. g'f,.:

f. WirEtashese.-((pear. ta=>. 60a r es 670*r>

a

?

%,gy.iinsbes.:... pear. ta-p. lana than 6coar) it;;

20 pe.i?. '.;;..:.<

T for. Iasel ea-r=== aria = differ by more than

. Ersn 218. de*e not mai. main pressuriser law 1 YGST.i.-

hys. '.

p,..

l m

.. g, m

bj'f: G.."..

g.

--"an'.oposabla level and/or camparature eransmittar. Ensur.

asturasa

.Q~&%{i~,,pamasuriser level to no

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with thalevet camp.asating

,1 trier o.c se that preestriser level be controlled amanally.

.]

fygasaariner.lavel estag Figure 1 (attached).

frn=== of a pressuriser level / temperature channel can be

. decasted by y=d-d.=e chanael comparison and the fault may be r -

'.h,

?' isolated using the following, e.achaiguas g

?*

M

.hp A '-7Pmpava level indications using each temperature transmitter

?

[B_S2

&.' &,i',f

., te locata a prohlma in the element or transmitter.

1 l

.MN.7 5.. Check makeup valve position demand to locata a problem in W :- Q.'

,the amplifier or recorder.

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Mjphb C.

Compaza uncompensated indtrations to locata e transa:

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951De ?ID 32. n2haraform, the faib of a h1

_--n-,@:.:'.avel. w~ tion'and makaap control ta'wca '

, sittim faulty.en=f==*ir. La a 1aveL instrument 4-- - _- _

AM

,h. ~ Planclac' steady staca emeditions to.eliminata

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i.'hThe-method'of"dacac. tion (redundant chaansi i

i 1 to k functioning properly.

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indicattaa

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4 1%'

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, drift apart by more than 37 (9 taches).

tus&*Mankooppsalva' taile 'stosed if the lavel inwtrummat faila

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--- - R b '*, p'gaggas kx,* me-a jsn Q-

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1boniths',pressuriser level controllar hand / auto station la l

and@tiths adsaap flow plus seat in-leakage flow equal

~

c daus.22,ow.J'..

~

eGodanaf

)peuer to sare and shot down.

gQs,iqJ. a.

s

--rsatias.

,it Y:...a ', '

e - ; A'with. step 6.3.2, add water to the 1.C. system from

~;*? tank.*. e=1-S=*e the quantitias

_s asins Figurs 2 (attachsd) the;~. sal /ta.;af the M.U. taak (30.86 sal /ia) 4:hs.' reactor

> y: :'.:n.;.

h 6'

.t

,i a.masps and ea.e4==. cooldova concurrent with M.U.

~#,n,.mp.).

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.:i,,, -

saro Isakage from the R.C.S.

Cassful l

~ '==labouldjbaWlte.1.C. pressure to detect any sign of a

.'- = -91a R.C. pressure may indicate the pres-t i

m l6 mdicatalthe'psnaseriser to be solid.-7ampciadssCaesarea

~ dghr 1 s

.y%#N'!WA:ME .:.'

<a'.uesk onder to determine the cause of and corrset the mal-tias>.Reaster operstiea with the level aa=p==== ting amplifier m - --

.y..,.- - -

..n requires that pressuriser level be controlled

.&.F.

MpT'.y,',,j 23: If passeuriser level instrummatatism failed lov (below 40

, 30 inches), a level tatarlock will prevent beater energisation.

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t N glazamlple,*amplains the method.suttaar.lavel'.s

' ' ': t m6-

' beats knowing the BCS shrfakaas as a l

' x.g

sw: #.

'y ?t!;. Eameple'..

'52Gno) 3 82*F.*psaseurisar level at 180 inches 5

l 2,#r > 4. ty...;,. -

i sat

.t i s72*F, add 2000 sal. of water. ( a.

.y 3

9

}

372*F to 531*F add 2000 gal. of water.

add 1000 Sal..of water between asch of the fol-

ia.*F;..

g 12-373-336-291 241-183-103 I

N r*

17 G(Dal CO. k.,' iaChas Of

. 'Zhia Wil eliminate the danger of m e-

.ar soing solid dua starting from 180 inchas fasegurtaer!1msel, flhpp.-

. ~. :. r.

xs *;

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