ML17249A778

Forwards Safety Anaylsis of Interim Actions Taken to Eliminate Feedwater Piping Cracks. Repair Program, Nondestructive Insps & Leakage Tests Adequate Until Further Recommendations Evaluated

ML17249A778
Person / Time
Site:	Ginna
Issue date:	02/26/1980
From:	Ziemann D Office of Nuclear Reactor Regulation
To:	White L ROCHESTER GAS & ELECTRIC CORP.
References
TASK-05-04, TASK-5-4, TASK-RR NUDOCS 8003240305
Download: ML17249A778 (9)

Text

jg(g'Ig egg t < copy Docket Ho. 50-244 Me find that the repair program, 'the nondestructive inspections and leakage testing performed following the repairs are adequate to8nsure the integrity of the feedwater piping will be maintained until the recommendations of your Owners'roup and the tlRC's Pipe Crack Stug Group have been evaluated.

Should we determine that further actions are required after that evaluation, you will be notified.

Sincerely, DTSTRTBUTIOI'I

~Docket t)RCPDR-Local PDR ORB Reading HRR REading D. Essenhut RVollmer Nr. Leon D. White, Jr.

OELD Vice President Electlic and Steam Production DLZlemann FEg 2, 6 1980.

'ochester Gas 5 Electric Corporation ~~~~"~

89 East Avenue JShea I

Rochester, thew York 14649 HSmi th Vfloonan

Dear Hr. i<hite:

DCrutchfiel d The tlRG Staff has reviewed the actions you'have taken to correct the cracking that was found in the fee4cater system piping at your plant, as summarized in Table 1 of the enclosed safety analysis.

Enclosure:

Safety=Analysis of Interim Actions Taken to Eliminate Feedwater Piping Cracking original sign~

Cqf Dennis L. Ziemann, Chief Operating Reactors Branch 82 Division Of Operating Reactors cc w/enclosure See next'age

=

8$ 0a 24 OI'I'ICKW OUIINAMNW OATC3N DOR.:..ORB..

JShea:

cc 2g/80

.DOR '.ORB..82."

DLZiemann 2/$4/80

~ ~ ~ ~ ~ ~ ~ \\

~ 0 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

NRC PORN 318 (976) NRCM 0240 I

II U C OOVCNNMENT tNINTINOONNICNI I ~ 1 ~

t0$

10t

,t S

v

~ g gv) 1

~<<~>~~~la vli,ill~(/li) fi

Mr. Leon D. White, Jr Fe-ruary 26, 1980 CC Harry H-Voigt, Esquire

LeBoeuf, Lamb, Leiby & HacRae 1757 H Street, H.

M.

Washington, D. C.

20036 Mr. Michael Slade 12 Trailwood Circle Rochester, New York 14618 Rochester Conmittee for Scientif'ic Information P.obert E-Lee, Ph.D.

P. 0-. Box 5236 River Canqus Station P.ochester, Hew York 14627 Jeffrey Cohen New York State Energy Office Swan S.rect Building Cor 1, Second Floor Ettt ire S"ate P1aza

Albany, New York 12223 Director, Techni cal Development Prograr~

State of Hew York E neray Office Ag n"y Building 2 Er;ire Sta e Plaza

Albany, New York lZ2Z3 Rochester Public Library 115 Sv~th Avenue Poches er, New York 14604 Supervisor of the Town o, On.ario 107 Ridg Road West On-.ario, Hew York 14519 Director, Technical Assessment Division Of.ice of Radiation Programs (AV-459)

U. S. Environmental Protection Agency Crys al Mall ~2 Arlington, Yirginia 20460 U. S. Environmental Protection Agency

?egion II Office EIS COORDINATOR 26 Federal Pl azz

!i'ork, Hew York 10007 Herber." Grossman, Esq.,

Chairman Atocnc Safety and Licensing Board

".. S. Nuclear Regula ory Comnission

~'ashington, D.

C.

20555 Dr-P.ichard F. Cole Atomic Safety and Licensing Board S. Nuclear Regulatory Comnission

'dash;nc".on, D.

C.

20555

~r. Erme"h A. Luebke Ato."..c Saf ty and Licensing Board S. Nuclear Regulatory Corwission

~ash'.ng. on, D.

C.

20555 4r.

Tho.-.~s B.

Cochran

!ia=u. a'i Resources Defense Council,

.725 I 5=rect, H.

W.

Su-.te 600

<<ash::nc.on, D.

C.

20006

n".

0 0

SAFBilNLYSES Gr.

l ~=iiIH <<iIGK TQN TO ELIHIHAtE FEED~~I-. Pili'iG CP~

Or

>-"y 20, 1979, Indiana and Hichigan P~ r Company notified the NRC of cracking in i~'o feed~~ter lines at their D. C. Cook L~i 2 =acility.

The cracking was discoY-red folluring a shutdown on Hay 19 to inv s igate leakaae inside contain L aking circumferential cracks wer identified in the 16-inch diaster

,-eed watet elbows adjacent to t~o stoam genera;or nozzle to elbow welds.

Subsequo~

"adi "maphic e"amin~'ions revealed cracks in all i=ht steam generator fe dwa~-

ii es at this location on both units 1 an"-'.

On Y'y 25,

1979, a letter was s nt, to al1 Pk? lice sees by the Office of Nuclear Reactor Reguiat'ion which informod licens w of the D.

C.

Cook failures and r~qested sp cific itlforamtion on feedwatar system". c sian, fabrication, inspection and oper

=-'--n"- histories.

To further explore the c r ric r. ture o-. the cracking proble-m=

Gi ice of inspection and Enforcement cJomted lic nse s of PIER plants in cu.

~ ent outag s to irin~ediateiy conduct vo:.-.i~t."i'exa>>iriztion of carta. in feed-~~or

.Ig w lds.

As a r sul 0

these aetio-..s.-ever-l othot ir'".":=- steam generator'e dwa er nozzi - c-pipin= w ld vicinity.

On June 2c',

1979

-"~i lotirt 7S-13 was issued.

The Sul lo=ir: reoi.iir.: inspection of the s

eat;, -one; a=or nc~~le-to-pioe welds and a'jacent ar=-as. wii:.-,i-.~ 90 days.

if flaws were found iri those welds, the feedwator'piping wal"'5 z th=-. firs

support, the feedwa,or p',oing

'" c."a~ainnlorit penetration and'the auxiiia.y feoMI= e to Iialn feeowatel piplro conine=ion were required to be insp ct

.'n c".norman"e with the Builetin, the ii"e"<<sa s cf =h planets listed in the..

a--~"ac( Tablo 1

Cnmai o od )ho racligaranl:iC e

a-., ',n--iOns anil fnunri CraCL inn

. e Gyrate.

D I D1 ng 5 vs elIE.

!::=-e-..".=5 and/or t iephone cotlferer,co c:-:5

~

-,=-

.".= c with the respectiv "is "55 he oi 1 owi nc i -.ems reg ardir"

=.-::=-

i eed.=--er pi "ino>> cracks

=--'. theoi.

1o>>

I<<

I

~ l>>s5<<

si

<<>> ~

a I lu 7

1 I

as".G

<<<<>> 1 of i<<ho ai evaluation crackirig.

~

~

~

~

a>>a n

o>>

~l>> <<<<o>>

>>>>e>>>>

~ << I

<<C i

~ =- 0'h'a7.

l y5o c; his>>O. v a

1 ons ii"ations

~

~

enso'oS 'nte lm reDG tS COrl alnl

~

..= i. C.:a; iOn

=- =": by the s-aprior to ii ni='5 -.=="r.-.'.n= -.o ow

!=i s cis"usse'n his analysis; i.=.- =-.===-=--'-,-

ue ass.s:e v CO, Osloti QOvo woro a-OOe OT Tel lui o a

o-, Yankee Row= was

-',-=

aclil y tiad c, oss an

<<'i

~

~

iC>>

~

~ i a

r i

I

~ ~

Cf i.".S:r;.; n a iOn i-,.s=a

'llo<<

~ ~

Group, significant cyclic stresses have b

n ider. i-,ied tI-.a occur in the fe~~~ter p<ping in tfz vicinity of the steam genera or no+1

.ronmixing and strati)i a ion cold au"iliary feedwater wi h hot wzter fred h

s=en generator during lop low condi ions.

The Owners Group is expe

~d to ~1= e their investiga i>s znd iriake reco~dations for chang s in design znd op r= ~n p".c"edures in February lgQQ.

.The license have repaired and/or replam~ the z<.e~>> piping in rest cases with.

improved designs to minimize stress risers.

In addi ion, ate licensees have cp-m'i ted to reinspect the steam aenerator m fe dwzt

. plpirg veld vicinities z", ~

subsequent refueling outage.

Although t¹ piping has been repaired zt the

, aciliti~w 1ist d in Table 1, the s zii ft ls that cracking could re-ocul in th f~~i.-.e ~t th se facilities.

the staff and Owners Group both have p rfo.-ed ind=-endm~ analyses and have deter ined

"~zt Tlawed fe dwater piping could ~-'",s znd "'i=-li r.'

from opera ing znd a"1 -d loads including seis-,ic and li-.i-t wz o".

1

~ 's wi hout loss of piping i"

equi-y.

Pipe breaks have occurred in ~.a past i.-..em~ter piping as the result of waier hz~r loadsi However, design chan".~s su

.. as w

'UD s have b en -~e op

<<t'1onal changes'av=

occurred ic min-,mize

=:na p=ssibil iiy oi wzier h~r.

In h

unlik=ly even 0

a f Bdwater pip": 3 ""ak s

v

~

wet r hair, -qe conseauences have been an-lyzed zs a desic-.

base ac='~e..

zr'cceptable me s res io d z )

wjti th e'veni, hav 5

Qn establ: 5na" ~

t n=

4?C nzs 1nst17UTed ln"-..- Ooii' ln Pr:R s

~

co~i

=:=- i=s work by J

-.=--.icn bv lie nsees, as a

Pip=- Crack Study

=r."up =c. '".: i

~ -';".is and oth r pip ',zck I ~ is an-.i "ipai ='hat

-:.he..ir "raw 5--uoy Group wi<<

une 1980'nd provid

- co.. -.=a=icos for review an"'

i~en

~=-

=co= i ude =hat repairs

~

.,c..=== zn= sch duled,

= i=inc inteari ~y wi l

~ <<

'i

<<QI W 0\\()8 v

~ >>>>

~ >>>>>>ii<>>><<l to>>he feeowa B.

an: -'ne a.nalys

=-

t 9=" liialn7z 1 neo S>>uo v G. oup hav=

I Cv i

~ >>>>

I on's,

he i ', cans

=i".in".

-.;

none s-.'ru ivy inso ctiio-.:-

o....== -."". -.;a~"'ipinc ensuria

-r,=t i

v=! '=

'10" IG h

5 zi i vi ca k 0'i i

~ ~

i '

>> C>>

<<na i

L. Illi

~

I iil)lc I " Sc>>H)1);))'y c)l I IJIt I

1 ~ 1 <<Iw>>t 1 ~ i.

I I tiliift (.)')!c:k!)

I'.AI II':.xl'I:.Ill'll,1th(;KlIIII (IIII).f).I'. VI(:rtll.'I'Y)

)'ll'Itl(l (',I)tll'01ll;tll 1'1101)Al)le)l CAllOF)

COHH!H'l')

~ II(1 8.

Ilc~

11 I I!

I.ii)'.1) I: I i))1

)'Iic)o.

II)'tiI I)

(r I. II1'.k tlci.

ci I I. I ii( i) t.) llc:kc'ct tfc ~!)! I 1) I

~ tic)1)ii)~

I I). (:.

(.'c)c)lc I /2

'I'Iii'11 wc) II II c)r fl el I)c)w Corrool.on hooio ted 2 crocko thru wall Fnt'))un Ilc'>>vc )'c) I lc y

.0. 1)t)(I>>

c) 0)(:loci(

1 c)I

3 e I.b()w

('.ortooiun Aooiotcd 13 tt(l(lltlotttt1 fttb.

I I'ci (.'

I;1io joel lcot I.c>>i!t rc: i>>

Kc)wc)<<>>c 1 ~

0.050" 7 0'clock 2 c!f I)ll)c

('orrpnion hooiotcl 3" clio. au)(,

food nc Fati uc SG inlet 1't:.

Itc'>>cli I/7.

0.01)7>>

3 0'clock 2.of 7.

rccliicer Corrooion hooioted I'otj8()e 3>> dio.'aux.

feed n

SC inlet II.It. Itcil)I)i!)1))) 2 t). 7.')tl" 9 t)'c.l.ork

.I c)I.

3 vccliiccr-(Iorroo ion hooio t:od UI)c)liow cracking in FntiGua ttnda>> tltert))ttl tjlaev

!Ic) I c )il I

(). 7 I'!"

ccI'>I tlclw r(.(l(t(:(.r

(.'cii rciri.t.c>>! h>>c) in tod I'0tiI,(tc

.It(it ()tt() r I'(..1 I), IOI)>>

jow(tr. ItnI.I:.

)il rc'.clc)cc! r 3of 3

rc(I(tet!t l)I:ref(It Aftflioted (lc))'

pi)J 1>>)

'Httlti))lc brtttt<<i)cd c

cvlclcitco Af ()c)t))c r

I)ttt'I'g

.1./2 0.000" 2 ond 5

0'cln<<k G

AE G

r eel(ic'c r.

(lorrooion hooiot:ed P(tI;i iuc (Il.Ill))I

/ lice)

I /7 0.10>"

II,I 1 fill"

/I Il ('

t)I'tt II

1) I fl 0 I 30 0' I.ocl(

2 1)f 2 elliow (t II)()(4 I) I I)(!

S I.reoo boo io ted Crocko oloo a t decl

(.'orrooiott/Corrooion mocltlttlttg t)tttrl(o

~l'ritI 'ue 4)t I ()oloft /tfnflnI:t))l I'(ll:I I)(tc 5>>) I'('cc II()l'I(!

~~

~

%l ~

6) OSS fnt)rtCIItlOII defects In p) p Ing

7.

I'I,AIII.X')'I'.llI')I':llA(:((.(tt()(tt(r'/).)i V I(:It)).'I'Y)

I'.l'.tt() ()Otlt'()llI'.tlat 1'I(OI)hl)I<Bi CAVO'OtltIINXII t la x, I)< I< I ls I.uca (. I ou

<la(x ~

I)ep('I( (lrnrk t'Io,

<) I I> I lien

(:moke<l

(.<< I<<I<<<a I I <<<1 I'.<Il, I <1<;<'<

I

<Ii'll I I<<I <<ll<!

7

(), f. <0 12 0'cio<:k 2 of 2 p j.pe Hot nnalyzed I':< I I.<:<<I < ~. <

(). I 1()"

1. <<<i<I 9 0'r.lock

7. ol 7.

p1)<e

(!orroaion Aaaioted Crncka found nlno n I'nL'.gue viciniL'y of l)01 1zol)

)i )i))