ML20006A584

Requests That Util 890216 Request for Relief from ASME Section XI Hydrostatic Testing Requirements for Mods on Nuclear Svc Water Sys Be Extended to Include Mods MG-12243 & MG-22243.Inadequate Boundaries Make Testing Impractical

ML20006A584
Person / Time
Site:	McGuire, Mcguire
Issue date:	01/22/1990
From:	Tucker H DUKE POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9001290152
Download: ML20006A584 (6)

Text

{{#Wiki_filter:hYh ?fh: Y h Nkl fyfV f eQ & c ge a p% y, jy; g-w m n -s m m v,, m~ ry g:w;tj ng m. r y g,, s y-e _a wy 3 1 s _;) y .4 9M n;hY:fi %glDet hww Company ( %, ; kf ?,,11% lW i $y &W%0,Bar331M!:;Ri%$ 'yd g k W W

• fl fd M

WhNh ^ s Vice Prnidenti. D QMQ@$$ [&Q Chadotte;NC!$MY ' $4% !NuclearProduction i .D gp B.Lw4[4 ~ 4

M @ W, q (70f)3.734531)

N pl $ 1 s e ~,; W w ', 3 s, .c q @[jp w w m y 3g 1 Ks %@_ ; W ', ^ i ~2 ^' D $W

DUNKPOWEW' M L

$1 M/BM - w "^ W@, A W WpffQ ' '& r Mny'kp fW 4 E H .~' .l S,Uhy 4 x ~:. y!Mg;g/ [Januar.g2h1990? w g My ,,y*x q fl a En g@[ $y..., r r s s., [ [ - N U' c.SbNuch.A 3 argRegu"atory Commicsion^ q --.s.. N l M ATTNh Documut(Contro1r Desk O [ f M{@g Washingtonn D y g 20555T ? yed jd@h 8@ % djecti? McGuNNucles6Stationf Units 1 and =21 1 h" m s; Of

Dodket?NosC 50-369

andL50.-370,

? ,i %D JASME;Section/XILHydrostaticlTesting? Requirements-g dmp% 4 A@f.. LRelief: Request nog 89-02,, Revision n' x, y x J '- ~, *, ~ nm, ~ v y;n y a n. ~' men : 1 'w w. Wp ', Gent 1e i Y # o e,A PW?

- eq s

-V n

g-y ~ ma6, c

.,_s 01. ,t... v, ~ M@f i@f ' thydrostaticitesting]requi rements, pertaining: toi mo 4'. d 'l 14 By;litteKdated? February 16, 1989,.:we reque'sted relieftfrom ASME:Section XIi, ij B c?i %n '[.@7 Subseq~uent ito zyo6rn approval, sand -prior. to c ourrim uWrehuestbyMette6datedNune;29,11989(s~eesAttachment'NoC2).f' i 'f.', ',Q i f dk,( f G y K /modificationsy changesytoltheLmodification"plansV(MG-12243,~; Unit?1iandT 3 s ^ ~ E l M MG-22243 5 Unit +2)swere1necessary.. 7c w~ - M wa .w MNdU Mhrihal)sh6ffthe nbdifications, Ewe _. planned;to;replaceLan' ) afn'ew st' inless steeli(SS)Evalve4 dfvthe'same) sizeT(209 L@ LO / foxisting7 valve with(11nch71engthiofiSS@ipeltontheloutlet sidei of3thefvalvey a ~ p;t: y.djnch),landtsddfall2 M g j Stoimitigaterthe @ffectslofferos_i.onL(seetAttach'me_ntsNo.71;); JOUR [ subsequent {s ' 1 "' M s QMW t pl ans ? arettok use ?a /16 TinchiSSiv21 ventwo t 1611 nch !by 2011 nchT SS E redu~cers F an @* A <G M!h y@all211 nchE S S Tpi pe si n stal l ed "onkthei nl et b s i del ofi the Yval ve ',W MRM M l i;9f sma11erisizedivalveTist based ?on bimproved ; valve' performanheScurrentlyJwhen ! W Q j M opp atingithis Jystemh the 20?inchfvalvelisithrottled atiapproximately;15% d i WohetWThei165inchhalveican beithrottlediopeniatigreateritharf 15%ireducing! <H $n,MlQfL, n. - ? wflowlimpingementVoni the^ outlet /sideJof Lthelvalve,itherebp(reducinglerosion;L 2 nye S ' ^ ~ ~ ~ ^ i N W M. ^- ~ v... -. , et J@V 'MMWetrequestj that,NRCistaff?ap'provalbof?ourLoriginal? Relief Request b+e>. "i a O Textendeditolincludeitheichanges:to modifications >MG-12243:and:MG-22243 : JThe-k[#Worigirnalf basisifor16urirequest?for' relief tfrom hydrostaticitesting M )%p @Ssboundarsiesk jThe hfMostatic:testdboundary iso

validMHydrostatiCtes' ing7isiimkactical due to the inadeiuaci ofH heltestc

'T t t h j hl 20 Rnch Mandf18.:inchLbutterfly valves. These valves: have' a history of ? j Q L Q MleakageTand do?not.~ offer. adequate'; isolation'to permitta hydrostatic test., j ~ c MMW9 s 9, Sy } D ds ; F y w %fY' ij yta { .s } h ? -,8 h . m, _[ ? _. . m. m

m i U.S. Nuclear Regulatory Commission ATTN: Document Control Desk January 22, 1990 Page 2 In lieu of hydrostatic testing, all welds in the modification will be subjected to a dye penetrant or magnetic particle examination on root pass and finished weld. In addition, an in-service leak test will further verify.the new connections do not leak. As you know, our Unit I refueling outage was started early due to turbine problems. We had planned to start our Unit 1 outage in March 1990. Since I this modification was planned for this outage, we request approval of this i request by March 1, 1990. 1 Should there be any questions concerning thit matter, please contact Steve LeRoy at (704) 373-6233. Very truly yours, hkCtk b. 4 Son M Hal B. Tucker SEL508 Attachment xc: Mr. S.D. Ebneter Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta St., NW, Suite 2900 Atlanta, GA 30323 Mr. Darl Hood, Project Manager U.S._ Nuclear Regulatory Commission Office.of Nuclear Reactor Regulation Washington, D.C. 20555 Mr. P.K. Van Doorn NRC Senior Resident Inspector McGuire Nuclear Station l l

y;;

s E ' "A*

-f.S; Nuclear' Regulatory Commission ATTNi Document Control Desk-b January 22, 1990 e r-t 5 l a u .e m- 't n' Attachment No. 1 .-.'.k a )r . f + g_ 4 r i ? n I f i

f..1 t

j. x k 4 ,5 k - i e h 4 ? 4 4

( e i

if f 4 i ? l ^ 1 1 4

(

~~ ^^ ^~ f -U.S. N cisar R gulctcry Cosumissidn- -l'. . ATTN:. Doctament C:ntrsl Dsck

• N, Duke /buer Company Jc;uary 22,-1990

., i .7 ~ : to Bar R/98 ATTACBIENT NO. I 1./~ Charlotte \\ C 2*:42 '.y l t I O-~ t February _16, 1989 7 U.S. Nuclear' Regulatory Commission - Document Control-Desk Washington,JD.C. 20555 p

Subject:

McGuire Nuclear Station, Units 1 and z Docket Nos. 50-369 and-50-370 ASME Code Section XI Hydrostatic Testing Requirements-Relief Request No. 89-02 q Gentlemen:. Pursuant to 10 CFR;50.55a(g)(5)(iii), find attached the subject relief request- ' thatLapplies for exemption from ASME hydrostatic testing requirements as they. pretain to modifications on the McGuire Nuclear Service Water system. There are a total ~of'six modifications. The first modification is scheduled for' implementation around July.1989; therefore,:it is requested that NRC review and - approval.be obtained prior to that date. Should there be any questions concerning this matter, please contact S.E. LeRoy at' (704)'373-6233. - Very truly yours,- s h,fBS i Hal:B. Tucker SEL/ relief 3/sel TAttachment xc: Mr. M.L.~Ernst 4 Deputy Regional Administrator, Region 11 ,U.S. Nuclear Regulatory Commission 101 Marietta St., NW,' Suite 2900 =At1anta, GA 30323 -Mr. Darl Hood U.S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Washington, D.C. 20555 Mr. P.K. Van Doorn .NRC Resident Inspector i McGuire Nuclear Station .O ?? IN

b a U.S. Nuclear Regulatory Commission February 16 1989 DUKE POWER COMPANY McGUIRE NUCLEAR STATION, UNITS-1 REQUEST FOR RELIEF FROM ASME CODE SECTION XI REQUIREMENTS RELIEF REQUEST NO. 89-02 '1. Component For Which Relief Is Requested: A. Components: 1) Welds and flange connections on NSMs MG-12233 Rev.0 and MG-22233 Rev. O, (see attachment 1). 2) Welds and flange connections on NSMs MG-12243 Rev.0 and MG-22243 Rev. O, (see attachment 2). 3) Welds and flange connections on NSMs MG-22130 Rev.0, (see attachment 3). 4) Welds and flange connections on NSMs MG-52128 Rev.0, (see attachment 4). These modifications are being installed as part of McGuire Nuclear Station's continuing effort to improve the reliability and maintainability of the Nuclear Service Water system. (See attachments 5-10 for flow diagrams.) 8. Function: The Nuclear Service Water system (RN) is a nuclear safety related, Class C system that provides assured cooling water to various station heat exchangers during all phases of plcnt operation. In conjunction with Lake Norman and the Standby Nuclear Service Water Pond, the RN system is designed to assure cooling for normal plant operation, and to provide cooling for safe shutdown normally, or as a result of a postulated Loss of Coolant Accident. The purpose of each NSM listed above is discussed below: 1) NSM MG-12233 Rev. O and NSM MG-22233 Rev. O replace flow elements 1RNFE5370, 2RNFE5360, and 2RNFE5370 which provide flow indication for RN system to Component Cooling (KC) Heat Exchangers 1B, 2A, and 2B respectively. 2) NSM MG-12243 Rev. O and NSM MG_22243 Rev. O will replace valves 1RN-89A, 1RN-1908, 2RN-89A, and 2RN-1908 which are 20 inch Fisher Butterfly valves used for flow regulation and isolation of RN system to KC Heat Exchangers. 3) NSM MG-22130 Rev. O will replace expansion joints 2RN4A and 2RN48 which are used to minimize pump suction casing loading on RN Pumps 2A and 2B respectively.

y 1 ~U.S. Nuclear Regulatory Commission February 16, 1989 Attachment Page 2 4) NSM MG-52128 Rev. O will add piping and valves to allow RN system water to the Control Area HVAC/ Chilled Water system (VC/YC) chiller to be discharged to the common 36 inch RN header between Unit 1 and Unit 2. This modification will aid RN system work on Unit 1. 'I C. ASME III Code Class: Equivalent Class 3 D. Materials: Se6 attachmented drawings. 1 2. ASME Code Section XI Requirement That Has Been Determined To Be Impractical: ASME Boiler and Pressure Vessel Section XI, 1980 Edition through Winter 1980 addenda, Article IWA-4400 and Article IWD-5000 3.- Basis For. Requesting Relief: For the modifications listed, we have determined that hydrostatic testing is impracticle due to inadequate test boundries. The hydrostatic test boundary isolation valves include 36 inch, 20 inch, and 18 inch butterfly valves which have a history of leakage. These valves do not offer adequate isolation to accomplish a hydrostatic test using conventional hydro equipment. The RN system is a low pressure, low temperature system with a design pressure of no more than 135 PSIG and design temperature of no more than 150 degrees-F. Hydrostatic test pressure for the RN system is 110% of the design pressure.or approximately 150 PSIG._ NSM MG-22130 Rev. O involves an additional concern of over-pressurizing and damaging the bellows assembly of the expansion joints while attempting a hydro. The expansion joints have a design pressure of 35 PSIG. Hydrostatic test pressure for this section of piping would be 38.5 PSIG. The alternate testing offers less chance of pressure damage to the bellows assembly because inservice inspection pressure at the expansion joints would be approximately 1 to 5 PSIG. 4. Alternative Testing: All welds will be subjected to a dye penetrant (PT) or a magnetic particle (MT) examination on the root pass and on the finished weld. An in-service i leak test will also be performed at normal system pressure. L i l^ l l' l L

^ t c.- ~, ', a 'U.S. Nuclear Regulatory Commission February 16, 1989 Attachment Page 3 l 5. Why The Alternate Proposed Testing Will Provide An Acceptable Level Of Quality And Safety: The ASME Code requires a dye penetrant (PT) or magnetic particle (MT) examination on the finished wcld surface for greater than 4 inch NPS. Wo will have imposed an additional MT or PT on the root pass weld which will detect any defects in the root weld. The inservice leak ir.spection will verify the new flange connections do not leak..It is our position that the alternate testing is comparable to hyirostatic testing for finding defects in the welds and mechanical flange connections. 6. Implementation: The'following are the approximate dates far' implementation of the modifications: a) 'NSM MG-12233 Rev. 0 - January 1, 1991 b) NSM MG-22233 Rev. 0 - September 1, 1990 c) NSM MG-12243 Rev 0 - January 1, 1990 d) NSM MG-22243 Rev. 0 - July 1, 1989 e) NSM MG-22130 Rev 0 - July 1, 1989 -f) NSM MG-52128 Rev 0 - September 1, 1989

(

r p., o t _;

F 4 Februcry 16, 1989 f fi,,- Relief Request 89-02 j v 1 l /-- 20' IRurf537o IA"IE 5 3 4 Cpttsu s?t[L,,, PsPi ZAuff $ 370 i i _ pg gSE M *T PI P I M & EOMYI OO \\ Cf.E M PTio u ptrbfb cs(

r. eta f' re mec eMeJt C A L towuft.T naj N

) ~ ~ d- \\ ,/ g 1 Au FE J 37o --\\- ) f,L_ / 1 Ru F F J 3 (s o rest,99 2' "##A* ygygepy C Agn a u b'EfL typa sn gtL, Fit ( Pief STAiutDe STEEt (Thf STAoMass aftTrop wws GE MYDio'p EtEnt P Tt'. J MGn6Wb fox

• FLb 5 cowwit7e J(,

F( A Nk(S To av e A re n,- Pe>ar. (q 3,} AETE?. IN5 7Att.47 t o *J of modi r'c Ate o va 1 Y f *i 8 3 DRAuJi W APPLIE S To uimh M (,.l2Z33 R,g,o

4. g t,. 2. 2 2 3 3 L,. o.

ATTAc H PIE WT I i

e; [ F February-16. 1989; P' E!l :: L 4

1. s Relief Rsquest 89-02 9

/ c. Ve t- -( Pr ow s r e v 4 N t a d ti A, 4 4d 190 8 l a w f i A,1 a,w ti o g PR ESE d T pr e n M V c o a ts s k u d.k T L o + l (TYN 1-- > 0' t/ h V s%,v" p W f {l,/,/ e 'b f LOW t d MAia LM

r. s t M II '

Egid)PtecaJ ii W(l0Eb f (4N ig4,, g g, N A. ALL W EL b 5 Awh i I "N I i A,1 A.w i g o g ' is A Mtra - C09u tsiso M L Myc ss rEO Wif M tu es t"' .< oo s Pi( ATI*d 3 P syg u ta. AFTEL e n t s.cMMT A T IC M OF Pf op g Ft C ATIO MS (yyp) 4 h TMt k buwsu> A PhtEL, To H L *1 's M ir ' n2 2 4 5 b.o e &% E l l'f 3 R.u. o AT7 4c H 01e 97 2

i"c: m* }et g) .P w< w Ja*r 'e I P f' 't ' 21 5 t

• w

' ", W ' \\ e e ~ i / to W v f I February 16 1989 Relief Request 89-02. n e d nas V 2 4w V A, 2 Aw's 8 D'AN 4 80 d 3Cidf5 wtLetb 'N - P' L A c i PResear c o n F u Gu/a. A r t e d Y S .. o t.* &pSg e b

• ) g

%b EY O' ' c( \\ 4' f' 3 65 4cg* 7 (' L' N ~ ~ s N g T fv% 1 Ete MPT o en

• L MEEbE0 Fen. at L wgios Ans 7'

)- utw p s. p u s.g cauagerosJ3 ~~ s J Assoc t ATt b - wve "I* evo c- -f-NEw n u as,o g soiwr wif H ' c owatAo t T e 6 4 ifA#WLg51 p yg g g, hab y LA uwlk lsuM6CnosMs FI FING-co n VI& v e-A T food A (:T 6 A'. 6400 t$ thtPGs'MO.tTc$, d THe A O *L A w t M G~ applies To ns m m v. 2 2, g o g,a, o ATTAc t4 MEU T 3

c t 1 ST6L P iPi W k gppoa te February 16, 1989 f Relief Request 89-02 ,j Fuw / fro m c c. et j T N \\ ggg gi * (RNde gygfL pip e* g,p.3 N u / ftew F RoaA Vt/YC CWsLLrt i fRgig M*f' P 1 P i W (r CON f I&OSAT'ON I* l NW 'g6K / T \\ g AN Si A, IAMiiO I Wt f ) ,ra. a vc/ve l l ! ', rc.~ o ' e. a i t u e q i N o f-r r,w um g NifbED FeA w& L b 5 Asa vAcyrs +GG lrQR. FL A dst genu tc7t s M 4 O k T n's k o b f op we as w vs Lur nsa e.ec a v fr myota's wt w P iPIN 4 FJ fwl PI Ps H (e Co n F(&UR Af!O A A F 'fC R. nob ( Ty p, Fo d. EtrMEA TAA'M Tut t bt Aw sub A ?Pt e c s to Ntm Wr - 5 2 t z t Rs.O A TT AC. 8 M ENT y

~.. -.. Y... ..-.- -_.._-_~. N'

• ^

e s.* My.= 1 g/ V. Februsey 16, 1989

• ~

' ~ Relief Request 89-02 M b mi,.... Cibh..Eh w.* ) r sg;. p e n ) p 5 ao Cl. O. EWITWt mar e[e j EZ S2E a v. u.. ;

• f '/

4,;, 8 S ,,;;,, G ,c T' F 2 t. m, Ez f % %1 g:

g 1

i gasus c M.* W ) <,. 3 EZ 2E4 c v ,_j-o EE E,_,, G S a U

u. * >

o c n b b ( t' -4 1/2* ) ( 1/2* P= i: 1/2* ) ( t/2* ] {Hi, @= lHis ....Q G---- c"EZ ZEc" l

g 3;

o 1 I t/2+ ) I 03 09 I t=L o w >s AGR A n -,su.o 3, ~ gr w e~r e Yr'W*" e=we--,y ,,+q

i February 16. 1989 Relief Request 89-02 ~ ters= 1 e 'r O8 t F9 ...gg WM..B i = F35n

===4 n e y 41D= - 4 b OD' 3 sectasm Essect cH.s assesa N ur P (~n. p h b: w.= j n. t i o o 6.o v G 8 g,,, G "" T4 O "' S 4,,G &. 1... EE = = ~ a.. N., z 4 m -s l i 7 6 g HQlCi O O 3L

==. 7 2E'" _3, u i 53 2B W. 1 m i. .e ...] e".,.> b i 22 ZE L W.., i. g p, L e s,rm. e s ,. v u ..........e ( .rR* ] \\[ ap2* 1 j iiil i 7, .3 = ' m -i a / -e

r-

=mm E w' i een, e g(_) c w> U u 4 g. pt.. w tnAirt A M h$ E M C. - l.5 7 4

• 8 ' l

~ ATT4c AMEWT 0 M f M.* We

• 1 s'

. ~. g _ _ _____ _ _

February 16. 1989 Relief Request 89-02 C14 {]C14

• e*

) /* dr g wrs s G-( an* p-i1 1/n') ( VF A w ram 4 E~, e C _ !" }-" ( an* F-(1 1/t= g g n..., ( 53 t grr r r ( ( >* ; c 257[4 7 0 zpg; 1900 ..n m-L-- )._____p-I p,. r p (1 1/m+ >- 160 45 g 7HO 1901 l g,, g l h ---4) --( 1* ) l i ( we* j i

4,,r.

= 1------+i) rau o i i i (1 1/2* F-( 20* F-l 0 I ---e l M b. - 2 2 Z I 3 2.w, 0 g- .... y MDTE 2 ~ D

a r---

u.... b l FL.* w bi o s.4 M D Th c '15 ~19

3. o (1 1/ 2

• ATTACHM W T'?

p.... by COIRMNT M CDR.!FG tet. ( 20* F- --=4 WA* ) ~ ( ~5 4 I= = g ( ( .4 q; e o = F m c

- - ~ g 12 ' 13 - g. February 16, 1989 ' Relief Request 89-02 3

• • I is.- j.

fam E-1 CCN: n^ W \\ ac-e574-t.1 M na

• 1 anPETY INJECTION bb j;T * ~~3 J

b. T.R".* C - A ec-2574-2.1 % i* ) g, -) c uz- ) d (smsrc w an* ) -{: m; a. 15DJT24 J

ZKMM@

3 3 ( r -)$@ -- c an' ) 0911 7 s % ZZ. 2 93 ' O M h -~~~ = ~ 3 ! l ' ZitN507 88 j 2AM'. 081' ( ED* )--- M ( 1* F= o sees u 'l ( We* ] ) MIA ( nS* F---

== I ~l' M tr.42 L 3 1 L,0 5D ~ Ll71 N um e p - =- Flow bi Afr A AM e N rot. 2.574 -

2. O

---

l --

Ai v A cumERT C 1

---

4

. 3 (,

Ll. Tp f February 16 1989 1_ o e p' e ~. ..Ra l.ie f R e q u o s t 8 9 -GF _ f.-- - ,e . - s,. m 1

• b' 4O p. g t,i L $

J.J ) i a GP *18' i - pg 3.- ,p _..g u n y .-~ - - e .e. m. u........ <.... y g 1 ~ 2*,, r..*y --y. e,

• H

.t s, y----

, - -g.

t a C. ".......L.siem958 r,. g - - -. g ,g e + ..m*.<: . F.

e. gy 3 i

T.a'~ ---+j'[~ h*A. h g i1.%1 b 3 ?.;4i"od. 4.

• w : -

l ,J, "+ S

e,..

.su... 3.. 1 qg Mc 26 .l A :nft t4 1

• r e=-

4-e' ..-_ p j .g e. 0 '1 'A>g----; y- .% n:... f a i i f. e i 3,g 1 .2*- n .w e x......... y .,,e . 3::

si:

/ / g. ,,.1.. 4 r 1 e. ) a y T :n t.. 1W.... 4.5 a M 3 s 4.. . n t' :.s \\ e 5370 w.

>e

) .F f H,c# w;:n C 3./ ** ) r. 1 1 ~ ms X ,w.,, j L s s3 v o

nex... 4 as w.

. 3.. u..,. Q"s . a. * ). ....q pc. ~ o e n E. A M c:4 9 s' UlO M C. 85*7 4 .g O i,.,... A f y A C H M 6 V'I 9 g tSWRS

s '. 's g-~

ip v__ _ v . 3/, e r-* A ~ 3f f g x.cc

1. A

,.t s ":,. t n s,. n:, e 'i.L :~! 0 4 : - g.. g . g ( .: - M, - -- - 3 Y

p...

me .s.L' ccn C fYl. C.k'iO44 N "e . xx. t ei'g, g

• ~--&,, - ' -. -
• ors.F..c 8,3

-:[I ,pyh: :. Ai' 1.4i HK. g. ~-. w.. ?-_ - _, _ _ -.. _ _ _ _ _ _ _, _ _ _ _ _ _ _ _ _ _ - _ _ _ _ _ _ _ _ _ - _ _ _ _ _ _ _ _ _ _

U4 4.1 .H .y* ~, a ..,F_._..--.- February 16, 1989 r- 'y' ar,_~1pf.] Relief Request 89-02 r,u,.,,.- -.. .,-_,_.-.n. F 4-4} {tmece , p. s u i f As~ 0 (.Tif m-o

• ._t*

31.._ i CPI.D T'_"4,. n +. - _..._..._ 4._. g g; g

h. 4 u.. n. - :.1,.

L. P. ':t s ' :

m. e. ;~--~ y n.-

g.. s-

b..

a _..-- e " t l ,__4,*.- - ",' '.aub ~ .--< _e-ar g . 2 * '- t y-- .=c..A useen -w ro

• J

._,.4 a.c/ % /. r. m % r. J, - - - -.- $ w.+4s l8CWE;l l g 3,,,g_ p..', r ,j m t,. i 2. t G 4. o ami. 2 ~ c s= s.5 f 6** j i p %.U t t i.:_. i l fupri . 3. tares e E i L'- - -s n' r a-m ..M.4 g i E'- g r 'T' m w*r. yy--- l gL' a s-r i

k:0T, 4

%Lf1 + ", 5 W C,- ' Y, ' a a._. t_.__.c t__:- .( ---E rcTt 2 4~ tEsb. 30 +-dF$1MW \\ 5p, 8 m 7 mar g.------i (3/4* .-4 E! M, ye ha :.'b: 2 e ,yf=33, . y ------i 1 (D, L -----e -eq v 1,] ice "u~~' f t. o W .2 3;,

^

b i A ir R A M 4 e 4 s y,, - - - - M me. - i r w - 2. o u e. g 4 rar. s ATtAt. Hrs 0t1T IC ~ ~ - " ' ~ i m l (-~**. 74 4, **

• g

^ l 'Is d c!4 g f J/ ** / rls i,,,+ w ] 3 c g.4., .A..'.4 ,g i = '9 a J %, c4 .s s 7: . A. Si 1,,, 7 : J s v N f 3148 ] . iji' S 7 ',iaj s af .g' MCM MM m&' g..eN \\ t as J usn u.:xw n ( Im u

.e - .S. Nuclear Regulatory Commission ATTN: Document Control. Desk January 22, 1990 I l j. l Attachment No. 2 i r i l {- I. p 1 f'. l

U.S. CuclOCr R:g'alctcry Comunicsion j ATN: Docume:t Control D xk l J::::ry 22, 1990 } ATTACMT NO. 2 l [(joase ,h,, UNITED STATES / i NUCLEAR REGULATORY COMMISSION l 3 WASHING TON, o. C,20666 lune 29, 1989 i Docket Nos. 50 369 t 50 370 v Mr. H.,B. Tucker, Vice President 14uclear Production Department Duke Power Company 422 South Church Street Charlotte, North Carolina 28242

SUBJECT:

REllEF FOR HYDROSTATIC TESTING AFTER flVCLEAR SERVICE WATER SYSTEM MODIFICATIONS - MCGUIRE NUCLEAR STATION, UNITS 1 AND 2, RELIEF REQUESTS 88-05 AND 89-02 (TAC 68972, 68973, 72215 and 72216) Py letters dated June 27, 1988, and February 16, 1989, you requested relief l from the hydrostatic pressure testing requirement of Section XI of the ASME Boiler and Pressure Vessel Code,1980 Edition through Winter 1980 Addenda, !WA-4400 and IWB 5000. The requests (Nos. 88-05 and 89-02, respectively) are associated with modifications to the fluclear Service Water System for McGuire Nuclear Station, Unitt 1 and 2. Specifically, the modifications are those identified by your following nuclear station modification (NSM) nunbers: NSM MG-12233. Revision C !!SM MG-52128, Revision 0 NSM MG-22233, Ptvision 0 NSM MG-12107, Revision 0 NSM MG-12243, Revision 0 NSM MG-22107, Revision 0 NSM MG-22243, Revision 0 NSM MG-12129, Revision 0 i NSM i:C-22130, Revision 0 NSM MG-22129, Revision C In lieu of the required hydrostatic test, you proposed non-destructive exam-ination consisting of dye penetrant or magnetic particle examination of the i welds and inservice leak tests. The staff agrees that the specific requirementc of Section XI of the ASME Boiler and Pressure Vessel Ccde, 1980 Edition through Winter 1980 Addenda, are impractical in these cases, so that relief from the inservice hydrostatic tests required by Section XI is justified. Your alternative non-destructive examination and inservice leak testing will provide an acceptable level of structural integrity. Our Safety Evaluation is enclosed. ~h9Y71YYM3.[ t -, - -. ~ ~ - - -

Mr. H. B. Tucker June 29,1989 Accordingly, relief f rom the hydrostatic test requirements is McGuire Units 16nd 2 as requested, pursuant to 10 CFR E0.55a(granted for g)(6)(1). This relief is authorized by law and will not endanger life or property or the common defense and security and is otherwise in the public interest giving due consideration to the burden upon the licensee that could result if the requirements were imposed on the facility. Sincerely, David B. Matthews, Director Project Directorate !!-3 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation

Enclosure:

As stated cc w/ enc 1: See next page 1 a

4 ) cc: Mr. A.V. Carr, Esq. Dr. John M. Barry Duke Power Company Department of Environmental Health P. O. Box 33189 Mecklenburg County 422 South Church Street 1200 Blythe Boulevard Charlotte, North Camlina 28242 Charlotte, North Carolina 28203 County Manager of Mecklenburg County Mr. Dayne H. Brown, Chief 720 East fourth Street Pediation Protection Branch I Charlotte, '4crth Carolina 28202 Division of Facility Services Department of Puman Resources 701 Barbour Drive Mr. J. S. Warren Raleigh, North Carolina 27603-2008 Duke Power Company liuclear Production Department Mr. Alan R. Herdt, Chief P. O. Box 33189-Project Branch #3 Charlotte, North Carolina 28242 U.S. Nuclear Regulatory Cosmission 101 Marietta Street, NW, Suite 2900 J. Michael McGarry, !!!, Esq. Atlanta, Georgia 30323 Bishop, Cook, Purcell and Reynolds 1400 L Street, N.W. Ms. Kart:n E. Long W6shington, D. C. 20005 Assistant Attorney General N. C. 0(portment of Justice Senior Resident inspector P.O. Box 629 - c/o U.S. Nuclear Regulatory Connission Raleigh, horth Carolina 27602 Route 4, Box 529 hunterv111e, North Carolina 28078 Regional Administrator, Region II U.S. Nuclear Regulatory Conniksion 101 Narietta Street, N.W., Suite 2900 Atlanta, Georgia 30323 Ms. S. S. Kilborn Area Manager, Mid-South Area -ESSD Projects Westinghouse Electric Corporation MC hest Tower - Bay 239 P. O. Box 355 Pittsburgh, Pennsylvania 15230

e2

• \\,

UNITED STATES E' NUCLEAR REGULATORY COMMISSION e i. I wassmotoN, D. C. 20555 s ,E %,..... / SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION REQUEST FOR RELIEF FROM REGULATORY REQUIREMENTS DUKE POWER COMPANY DOCKET NOS. 50-369 AND 50-370 MCCU1RE NUCLEAR STATION. L' NITS 1 AND 2

1.0 INTRODUCTION

j Technical Specification 4.0.5 for the McGuire huclear Station, Units I and 2, states that the surveillance requirements for inservice inspection of ASME Code Class 1 2 and 3 components shall be performed in accordance with SectIon,XI of the ASME Code and applicable Addenda as required by 10 CFR 50.55a(g), except where specific written relief has been granted by the Comission pursuant to 10 CFR 50.55a(g)(6)(1). Pursuant to 10 CFR 50.55a(g)(5), if the licensee determines that conformance with an examination requirement of Section XI of the ASME Code is not practical for the facility, informatior. shall be submitted to the Comission in support of that determination and a request made for relief from the ASME Code requirement. After evaluation of the determination, pursuant to 10 CFR 50.55a(g)(6)(1), the Connission may l grant relief and may impose alternative requirements as it determines to be authorized by law, will not endanger life or property or the common defense and security, and are otherwise in the public interest giving due consideration to the burden upon the licensee that could retuit if the 1 requirerents were imposed. In letters dated June 27, 1988 and February 16, 1989 Duke Power Comparty (the licensee) requesteo relief f rom hydrostatic testing requirements of Section XI, 1980 Edition, incluoing Winter 1980 Addenda, of the ASME Code, Article IWA-4400 and Article IWD-5000, for the McGuire Nuclear Station, Units 1 and 2. These requests were identified as Relief Request Numbers 88-05 and 89-02. respectively. Both requests are associated with modifications to the McGuire Nuclear Service Water (RN) System. The requests ano supporting information have been evaluated by the NRC staff, as noted in the following description and evaluation, h(YN hth

2.0 DESCRIPTION

RELIEF REQUEST HO. 89-02 In its letter of February 16, 1989, the licensee requested relief from ASME Code requirements for six mootfications proposed to improve the reliability and maintainability of the RN system. This system is an ASME Code, Class 3 system, providing cooling water to various heat exchangers during all phases of plant operation. The relief request is for weld and flange corrections associated with six nuclear station modifications (NSM). These six nodifications and their planned dates for 1 implementation are: (a NSM MG-12233, Rev. 0 - January 1,1991 ~(b NSM MG-22233 Rev. 0 - September 1,1990 c NSM MG-12243, Rev. 0 - January 1,1990 d NSM MG-22243, Rev. 0 - July 1, 1989 e NSM MG-22130, Fev. 0 - July 1,1989 (f NSM MG-52128, Rev. 0 - Septent>er 1,1989 i The purpose of each NSM listed above is discussed below: 1) NSM MG-12233 Rev. 0 and NSM MG-22233 Rev. O replace flow elements 1RNFE5370, 2RNFE5360, and 2RNFE5370 which provide flow indication for RN system to Component Cooling (KC) Heat Exchangers 1B, 2A, and 2B respectively. 2) NSM MG-12243 Rev. O and NSM MG-22243 Rev. O will replace valves 1RN-89A 1RN 190B 2RN-89 A and 2RN-190B which are 20 inch Fisher butterfly valves u, sed for flow re0ulation and isolation of RN system to KC Heat Exchangers. 3) NSM MG-22130 Rev. O will replace expansion joints 2RN4A and 2RN4B which are used to minimize purp suction casing loading on RN Pumps 2A and 2B respectively. 4) NSM NG-52128 Rev. O will add piping und valves to allow RN s water to the Control Area HVAC/ Chilled Water system (VC/YC) ystem chiller to be discharged to the connon 36-inch RN header between Unit 1 anc Unit 2. This modification will aid RN system work on Unit 1. For the above modifications the licensee requested relief because testing . is impractical due to the inadequacy of the test boundaries. The hydrostatic test boundary isolation valves include 36-in., 20-in., and 18-in., butterfly valves. These valves have a history of leakage and do not offer adequate isolation to permit a hydrostatic test.

3-The RN system is a low pressure, low temperature system cesigned to a pressure of 135 psig and a temperature of 150' F. The requireo test pressure is 1.1 times design or approximately 150 psig. NSM MG-22130, Rev. O, contains an expansion bellows assest>1y having a design pressure of 35 psig. The required test pressure for this section of piping would be 38.5 psig. In lieu of hydrostatic testing, the licensee proposes that all welds in the nodifications be subjected to a cye penetrant (pT) or magnetic particle (MT) examination on the root pass anc finished weld. An in-service leak test wculd also be performed at normal system pressure. REl.!EF REQUEST NO. 88-05 In its letter of June 27, 1988, the licensee requested relief for four additional modifications to be ude in the RN system. Eight welded butterfly valves will be replaced with flange end connection valves four each in the Cuntainment Spray and Conponent Cooling Systems. Relieffrom the hydrostatic test requirements was requested for all welds associated with the valves being replaced. The welds connect new flanges to existing pipe. The four modifications and their planned dates for inplementaion are: a) NSM MG-12107, Rev. 0 - Februar" 1,1990 b NSM MG-22107, Rev. 0 - August 1,1989 c NSM MG-12129, Rev. 0 - February 1,1991 d NSM MG-22129, Rev. 0 - January 1,1991 13M NG-12107, Fev. O will replace Unit I valves 1RN-134A and 1RN-235B and NSM MG-22107, Rev. O will replace corresponding Unit 2 valves 2RN-134A and 2RN-235B. These four valves provide inlet isolation to the four Containment Spray System heat exchangers. NSM MG-12129. Rev. O will replace Unit i valves 1RN 86A and 1RN-187B and NSM MG-22129, Rev. O will replace corresponding Unit 2 valves 2Rh-86A and 2RN-187B. These four valves provioe inlet isolation to the KC System heat exchangers. The nocifications for which relief has been requested will be made during refueling outages. The RN system prcvices coolant for the Residual Heat Removal and Spent Fuel Cooling Systems, both of which are needed during the outage. During the cutage, the supply and discharge beacer for either train can be drained and avail ble for work for six days on Unit I and ten days on Unit 2. Unit 1 is more restricted because the control room ventilation and chilled water system discharge to the Unit I discharge header only. Thus, when this header is drained, these systems are inoperable, which places Unit 2 in a seven day operability constraint in compliance with Technical Specification 3.7.6. allowable time to that required for the modifications. p These short time A hydrostatic test is impractical and would acd days to the outage scheoule. 1

1.

• Since the isolation valves on the system are 36-in. butterfly valves, the valves would leak at hydrostatic test pressure. To replace the valves would involve a major undertaking.

The licensee stated that the additional manpower, planning, execution expense, and burden required to perform the tett would not provide a commensurate increase in operational quality. In lieu of hydrostatic testing the licensee proposes that the welds be subjected to a liquid penetrant or magnetic particle examination on the root pass and the final welding pass. An inservice leak test at system pressure and temperature would also be niade on the welds involved. The licensee believes that the alternative testing that is planned is adequate to ensure safe ano consistent reliability of the system. 3.0 EVALUATION We have reviewed the licensee's submittals inclucing crawings and descriptions of the m difications. We concur with the licensee that the ASME Code requirements of Article IWA-4400 and Article IWD-5000 are impractical to perform on the modifications at the McGuire Nuclear Station, Units 1 and 2, and that the alternate testing provides an equivalent level of confidence in system integrity. We also find that due to design contraints, compliance with the Code would result in a burden on the licensee.

4.0 CONCLUSION

We conclude from our evaluations of the information submitted by the licensee in support of F,elief Request Hos. 89-02 and 88-05 that the Section XI ASME Code requirements of Article IWA-4400 and Article IWD-5000 are impractical for McGuire huclear Station, Units 1 and 2. The alternative weld examinations and inservice leak tests proposed in lieu of the ASME Code requirements will ensure acceptable levels of inservice structural integrity for the RN system. Accordingly, relief from the hydrostatic test requirements is granted as requested, pursuant to 10 CFR 50.55a(g)(6)(1). This relief is authorized by law and will not endanger life or property or the common defense and security and is otherwise in the public interest giving due consideration to the burden upon the licensee that could result if the requirements were imposed on the facility. Principal Contributor: D. Hood, PD#11-3/DRP-I/II F. Litton, D'EB/ DEST Dated: June 29, 1989

0.S. Nuclear Regulatory Comission ATTN: Document Control Desk January 22, 1990 Attachment No. 3

4 + U.S. Nuclear Regul: tory Comunirsion ATTN: Document Contr:;l De:k j January 22, 1990 ATTACHNENT NO. 3 P.penq(zo " Cge bou A lo(o l) n.- l (. Y lvt i RM F9 A, I Rh)19eB, 4 a RN N A ; n z.Rh3 RO B 3csed b 's $ don [i wadie'u p ) IL" of 314dl%s 5-}<< \\ cens brac$in eJ, N e o vetive.s a re. 4*e I RM19 A s i RW 19o8, AR4 8cl A, mel I RAJ 190 B g.2, v l, n3 S k b ks s 5 b'I p, ' s A anz / TT' ,4), wgq fasbn.y 0pon.y 2 *d, ('ardew M0lo h N- . / f) M*w [~*~~\\ I /'P 6pbhin3 pik fla y% get sA13I Fao4, ao*d, C eko AIOl> 160,1b. s4ct. Udl. ) weld nu.k rAlsed fnec_ /?colueers ace. 20 *x a" g4ainless sla! SA 40 3 p p 3o4. d), war bri

• E kNet Spyftsten a ch I I Igxts to mc.- m e c.) ma.2zz e a, M & s 1

SEL _}}