ML20024C835

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Lists Addl Items to Be Considered as Possible Recommendations or Areas Where Further Action Advisable Re 781107 Trip.Pressurizer Water Level Should Be Increased to 240 Inches During Normal Operation
ML20024C835
Person / Time
Site: Crane  
Issue date: 11/20/1978
From: Herbein J
METROPOLITAN EDISON CO.
To: Arnold R
METROPOLITAN EDISON CO.
References
TASK-*, TASK-03, TASK-GB B&W-0878, GM-0634, NUDOCS 8307130391
Download: ML20024C835 (7)
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Reference (A) n a 017 dated 11/17/75 t

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Isci (1) and (2) Oavis Bess, Cecidov=s Isel (3) BW Re::._ e.isti::s f r Teed P.-:ps and Yalve Controls -

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. )4, Reference (A) pues 13 and 11 ;rovide ree:..e=1stiens for further action L.

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  • 1 Belev are some alditi: cal ite=s ttist we =ay vtch to consider as possible recec=enhtions or aren: In whi:h.^.Lrther eff. rt mm;r be advisable.

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?.:rbire '4.-ar s Vs!-* "?!'-il Air furely Lice:=?

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,7 future fallar.he to rig;id =sesting.

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an?. bu'sle e::*.r.;,1 design ve c:7 ded.de to replace the ':"C-? sFray v31V' with a "?.sek 7m.rces Valve"- si=ilar to the one 3:enee 1:: in:talled i

following.repes*ed probicas with the?r spray valve.

Davf: Yesse Loss er Trescur! er level l.

Ces attached Teless - vertal ec unicc'.icts for=s l

We should contiiice to exch*:Ge Inf8?:2'l'c c: what =sy or nay no,. be zisilar preb* c=s

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It's no.ed that D3 loses P;, a yti=e they in?tiate cu=111a.y,eed

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Errerte sh cid he initiated te have Br. advise us of other 177 P ants vith similar, lese of Pg, pret'e:2.

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Future Te _eersture Oce f fleient l'+SMP"*"t*.-

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!.!:e need to be evaluated _

Existind cesh e:ent 7p )hs ::.f nould be determined.

rev ?.. II.*te fer nensk.c 4

r,e nc. h !!=!!: sh.:ufd't-ee.fi-.e.1 by a lynchbur; simulator nn StacE Ie "P e'ure ->rt.aguttens.r.ced to address ope [a,-ien at eMaM N

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T;,Y for te.persture eccfficient messure:ent 8

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for the c=all pressuriser en tne n:I 1 and 2 plants 7,

[1 Kev bypn s vs'.ve_ e.nd Itne rise sheuld b= revievad carefully for 4

necropriate sizing i.o enaM e.rspid P.akeup during future cooldovu

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Reco==e.ds-ions c:i Reterecce (A) should be cimrified ressrding those which j

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" Teed P x-- **.teker" a.-f "A r.ossherie 'J.t=o" Chntrol Modifiestions

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S'JO*.'.Rf 07 DISCUSSION:

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s I called Fred to'discuse Davis-3cs;se 1.co,oldowns.

Fred infor=ed me that their first cooldown was in Sept. 1977 vNen the E2! relief valve, stu:k open. During that cooldovn the RC pressure dropped to 900 ps.f very rapidly, and exceeded tha-ceoldova rate contained in the TSAR. ? tier to returning to operations they rc:cived that Trad c. alls "an imediate a-tien letter" from I&E, which requiral severs 1 analysis. Fred ch racterized ILY as having put them through the ringer.

' Bob 1.in'es. 35*.I. did r.ost of the analysis for D5.

The NRC still questioned Davis

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i Eesse hased on Design Criteria 13 vhich it.E clai=s requires the range of all instru=en:s should =ce: all transien:s conditions. They still have difficulty

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i with their systc= any:1.me auxiliary feedvater is used - they tend to loose Icvel in the prenurizar frcn cooldovn. "The pressurizer Icvel instrueent is listed in their " Hot Shutdown" list.* DB's cooldern c'xeceded maxi =um cooldown rate in the FAR of 100' an hour agd they were required to analysis. Their cooldown was 1400 psi in 15 ninutes. 62 T in 15 minutes.

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c 11-8-78 Dates.

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2;A*.S OT OTHG PACI IJ."3 HIS ORGA'!IZATIcit: Ceorge Hurl - Toledo Edison Co= pony SU3Jy.07 Oy CO*M.':*ICATICI:

I 51:201ARY 07 DISCUSSIO!:

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I called Cearge to disruss the runot I,had he:rd that DB-1 had been required by the I:RC to do certain n.slysis based on having lost 1cvel 'on the pressurir.er during a tranr.icat. George had scee IIcited f amiliarity with this analysis, he inforsed ne that they had lost indication of water level in the pressurizer and vere

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' required to do an analysis by Region I&E..which eventually showed that in fact leva.1 was not lost. Es'.: perfor=ed the analysis for DB vith considerable assistance fron Toledo Edison perse.-L e1..Re suggested that I talk to Tred ?! iller since he vould be core familar.

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He Note on The Above

?N. ? tiller was not in his of fice at the tinte I en11ed.

vill call me later.

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Ti!E B1BCCCK & t'It.C0X COMPA!;T r..

POWER GE! ER1 TIC!! GROUP y,

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c. F. Mille, Station Superintenient fj, q Froe V

.r L.' c. Ror.ers, cite operat to..e :.S:s 'e.r Se5 **2 s i

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File No.

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Date

.A Turti e Tr!e Tr nef er.t "rfe-ts 13/8/78 3,

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-a In an: lent h1 story (Unit I startup), a procra. that enhaned the ICS abilit;- to override a severe se< ont.:ry.;.lant trancier.t. such as T/G '

.,., trip, frz.s hich 3.over level: vs: es=picted.

M*.* cffered this program

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to CP'J Ma.~ir.e=ent early in the I.lant startup. T.e i=p. ovc=ent field chance v s totally reje:ted then and at: sin

  • vhen EV Prcject Msnaccment (G. **'ard n=d L. Picthe) at,te:pted to (;:ather the interest of C11.1 in
p. :

having a better trar.:lest overrJde e scility.,

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Duris'- the trancie=t of T ::o'vc=r~,:r.:the ICS t aces showed ths.t if t"ne"

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ferd ;n=p liche " c *. rui t cad "t.t=c:p!.cric d =p' circuit: vere imort Jo.ated, the transient could.have been le.ss severs.

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j (*. f Also 'di: covera!durinc po t tran:ient, che:h'ir.c va:.he probics of

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=upportiac the turbine typn=s valves. EV h attempted to a::ist the I

q site in* repair ar.d in.c'sticatics' et the*gs1ve asse.blies. Eovever,

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-i the ta:ic prohl'es vill not be corre:tei u.blems the =cthod of supporting *

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. the oper: tors is chanced. Afte. prope.- =:rGr.tir,: of the typa=s valve.

  • j;- 'j operatore, the, valve stroke adjust =ent =sy elimisste unseceptable 7-
q leakace thrc1.sh the seats.

If you initiste she proper setier., EV ess a::f:t Met-T.4 in icecrporati g i

the fiald c:=r,:;e I=pr=ve=este to the IC0; and in conjunction with proper

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..e bears vrdre operatien ;1sr.t operation: can be i= proved.

. If you haie any further questi:n:. T.lesse do r.st he=Itr.te to' ecstset rae.

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