L-76-281, Proposed Amendment to Facility Operating License DPR-67. Proposed Change Concerns Deleting Condition of License J. Which States That CEDM 44 Shall Be Replaced at the Next Extended Reactor Shutdown Expected to Last at Least Two Weeks

Proposed Amendment to Facility Operating License DPR-67. Proposed Change Concerns Deleting Condition of License J. Which States That CEDM 44 Shall Be Replaced at the Next Extended Reactor Shutdown Expected to Last at Least Two Weeks

ML18096B510
Person / Time
Site:	Saint Lucie
Issue date:	08/03/1976
From:	Robert E. Uhrig Florida Power & Light Co
To:	Ziemann D Office of Nuclear Reactor Regulation
References
L-76-281
Download: ML18096B510 (12)

Text

r NRC FonM 195 U.S. NUCLEAR REGULATORY COMh ON DOCKET NUMBER Iz-vB) 50-335 r'JRC Fll E NUMBER DISTRIBUTION FoR -ppRT 50 DOCI(ET MATERIAL To: FROM: DATE OF DOCUMENT Florida Power & Light Company 8/3/76.

Mr. Dennis L. Ziemann .Miami, Florida DATE RECEIVED Mr. Robert E. Uhri 8/4/7.6 ETTE R NOTORIZED PROP INPUT FORM" NUMBER OF COPIES RECEIVFD 0 ORIGINAL PflPNCLASSIF I ED One signed copy

.QCDeX DESCRIPTION EN CI.OSU RE I

Ltr'. notorized 8/3/76 ~ ~ .requesting .that section J, of Enclosure 1'o the Unit No'.

'1 Operating'L'icense'e deleted a's a condition of k

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a, j PLANT NAME: (4 P)

ACKNOWLE9GED

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St, Lucie gl DO NOT REMOVE SAFETY FOR ACTION/INFORMATION 8 4 76 RJL ASSXGNED AD: ASSX NED BRANCH CHIEF: Ziemann AD'RO

~OJECT MANAGER: IIANA LIC, ASSTo: Diggs L INTERNAL DISTRIBUTION 6 FI SYSTEMS SAFETY SITE SA NRC PDR HEINEMAN ENVI 0 N I&E SCHROEDER 8ENAROYA EN OELD GOSSICK & STAFF ENGXNEERING IPPOLITO MIPC MACCARRY K RKIJOOD CASE KNIGHT SDMEIL OPERATING REACTORS ES PAMLXCKI PROJECT MANAGEMENT REACTOR SAFE'IIY OPERATIN C BOYD ROSS EISENII P COLLINS NOVAK SHAD HOUSTON ROSZTOCZY PETERSON'ELTZ CHECK BALER GRIiifES HELTEMES AT&I SKOVHOLT SALTZMAN RUTBERG EXTERNAL DISTRIBUTION CONTROL NUMBER LPDR: Ft. Pierce Fl NAT LAB: BROOKHAVEN I TIC: REG VIE ULRIKSON ORNL N

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August 3, 1976 E.-76-?8l OEX'ice of Nuclear Reactor Regulation Attn: Dennis X.. Sie.'!~ann, Chief Operating Reactors .srrnch No. 2 Division of Operating Reactors REcgyg U. S. Nuclear. Regvlatory Commission bash3.ngton, D. C. 20555 Deax'r. 7.iemann:

Rc: S t. Lucio Un it No.

Opec;ati ng License DPR-67 l ~Nil-~'-"

Condition of T,iconse Iegule ory Docket File Florida Po! rer s X.i ght Company (="PL} hereby re.guest.s that Section J of Fncloaure l to the St. Eucic Unit. No.

Operating L'icense bc relet.cc's a Condition of License.

l As cRiscussec: herein, PPX believes that this Condition been sat,isfiec'. and i, no longe" recuixed.

'L'he subject Concition of License reads as fo3.louis:

Control Element. Drive E'.c:chanism (CEDN) 44 shall be rcaai ed oz replaced at the next ext:enrage@ reac" or shvtaose expected to last qg.S at least tL~'o vmer.s."

This Condition was added by AlMACTtlc.'nt 4 to Di'R-67 be-cause FPL was unahlo to comple e the cold rod drop time testing requi rm'. by a preceding Condition of Ei cense. 'i'he testing as recoiree1 to preclude the reactor being made criti cal under conti tion (i. e., coLd) which had not. fix'sK been te" ted for roc drop t imcs, since it was conceivable

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that t.he plant would bc in a cold critical conait.ion at. some time. during i ts expected se'vice lifetime. Thi s testing was not co!npletod due to oifficvlty experienced ia ~~.ithdx'awing the rod controlled. by CEDE 44 Ln cold condit5.on. The test procedure recuircd. that the two tastes rods be tested several times at various Xlov conditions. It the second fastest rod. was that controlled by CE'Dt< 44. Al-happened that.

thour>f} the rod cauld not be withdra! n successively in a cold condition in order t-.n coalpl.ate the leqoircd number of tests, xt operated sati sf Bciorily at hot opckatincf conditio7ls e Accordingly, the Zi cense eras conditioned to add. Section J to Enc?os@ra l of DPR-67 anc~ t'ai delete t: he authorization for low temperature critical.i ty containcB in Technical Speci f ica-tion 3. 10 3.

t'o STAT= GP ." LQ>7. N' ss

( COU-'.<TY Q" QZ DK Rober ~ '. Uhrig, being" irs+ Buly s'~~ore, serosa@ aa6 says-That he is a Vice Presiciont of'lor'Qa. Po~~er & Light Company~

the L'ensee he sin; That he has execu e8 the -foreco'nc~ aocamen"; that tne st<"-e-Rc3T s IQ" QG B. thi s saS.Q document are true and, correct. to the best Qf .ale kGO'19C@e ( X,:liolaHP t1OQ ( an'8 bali& BliQ that -le is au=hori ed to execute "'he c=.ocv~e~t on behalf of sai8 f g Licessae.

Rober" R. Uhr q Svasc ihec'.".c: swor. to before me th's CQ J~'f NOT'ABY PU~>X C, in am'x'l~f~fhe County of Da&e, S'tD 0 0 Pluri IMV $ TATc Qf f~~g p7 ~~

5!j coDAissz.on QY.pirgs:

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l TQ Ponrx,r s L 7 xema~ln August 3r i&76 Re: <.8 I,uci q Linc t.:4o. 3, Page i Opcx'8.ti 1lg I col'c OPS- 67 Candid.ion of License J Since the i-suance of Amenc":mont 4 to DPH-67, the pcx'formance of.'he CHDM has improved considerably. Althougtr it x'eclui red beati J>g the RCS to approxima tele 360<F before the CEDN initially coul<'. bo withdrawn, consis "cntly, it now reaches this level of operation at approxirretel.y 290oi'. 'She rod has been tested on several occasdons "S.nce the initia3. colo rod cxrop time testing-On June 3.2, 3 9 I 6, during a maintenar.ce shutdown, and fol Lowing

,'oo3c'.own to 260oF, the rod v:as <<Kthr3x'own three times in succes-sion anQ dropped once to verify it.s previous timing. Xt was thes'x v:i thdrae,n and dropped nine times '-n succession un8er various flow conditions in accorr3ancq v.'ith the test, procedure. During the heatup bacF". to 'pov er on June 18, 1976, the rod v;as again tested and was v~ithara~in successfully at. 260oF. fowever, on $

July 10, 1976, during the shutdown to inue.tigate an observed power di stribution anomaly and fol logic cooMo~m to 260oF, t.he rod ~~as successfu3.3y vi thdre.wn on t.he first, at tempt, but. cou3.d not be ful3y vi thdrawrx on succeeding a'tempts. '1'bus, although considerable improvement has been observed in its v;ithdrawal at 3.ov ternpercat<<re, the Cabot'ontinues to shove some inconsis-teTxcy 5n its perforrnarrce.

Despite this i neon".i stency successive r,'ithdrawal o f the rod the test. t.en~perature has occurred suf ficieot.l y to a11o~ cov~pletion of the cold roc~ r3rop time testing. These tcs s c.. tablish the rod cont.ro3.led by CRD~1 44 a, the Ca test. rod during successive drops z~t low temi~czntnze u."idler vari ous flovr conditions These

<>ate> .3iave been revie>>c'.c'. by the Faci 3 it y Reviev'roup and are ava$ 3ob3e on "ite for re+'vI by Region IL 26K personnel.

Hilviog sate sf actor i 1) co%pl 6 ted the regvircd te o~ CERN 44 loses any signi r.icgnce it have had ti lip the repair as g

a Condition may of Li car c. Di.faculty in witMrav:a3. at low temperature now has onl.y operat.ional significance "incc a Sully inserted rod iappropriately s inhex Qn'tly sa fe Thus the repaix. 0 f CHON 4 4 bee orucs more a rovtiJ)e maintenance item rather than a Condition of License. Furthermore, the perfornarxce of the rod at. low tempt- ra tvre doe not <<vezx have oper a tional si on i f icance since FPL has no i.ntenti on of reinstat.ing Technica3. Speci. f icat:i on 3.3D. 3 which ivogld allow 1ow temperature criticality.

hl.though FPE beLievcs that Section J is no 3,anger a necessary Conc. i ti on of' icense, FPL does plan to undex't.ake inspection of the rnechani.sm during the'resent outage Vpon .r emoval of the CEDM upper <guide structure, the extension shaft of CEDH 44 ail.1 bc visua) 3y inspected. Following x'erriova3. o$ the reactor head, the mechanism ail.1 be inspected internally using a

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~~UN'T.~ VOX t Aug< -', 1976 I

Ope;a -ir.r Lice:is'e DPR-C7

'8a".~x.C ion of lex cenGC boroscopi.. to Qe+cr:.n ne @bethe anv ivat.eria3. obstructions icjYsL.'zi.ticMAoiv2.its cg st.

cnc~rgiaad an~ 'he gripocrs .~ii3.3 '.je exercisac3.

I Thc CEQYi co) H wil3. then be ox'ari

~'he horoscope vill vil be urea to obsess've their m. nner ofcompl.etymon 1 be x>ader t.aken a, red,ui roc~. Upon operate on. Flushing of thi s in-spect 1 0'0 and QQ !Yf the s 948 cogent }Jeat Qp ~ CEDN l 4 vile agan 0

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be tested a" 260 P. The its-ection efforts replacement for CEDN 44 are expect.ed to xequi re one wee ~. Since necks .ax'y, and since reolace~cnt ~oui@ require t~:a weel:s to t may cor!)piete vhich wool(',, ',hereby, interfere with the present

, reactor inspectien and t.es be o f in'rop am (the reactor head >rill for only one. v eR}, replacement of CEDt4 44 is not

'plan'net ciu in@ this ovta~e. Should the ef fox ts dux'in@ t hi..

ovta~e prove unsccccs=-;..x~1, the roecnani Gw

,the next scheduled refueling outage and. replaced 5.f necessary.

vill be tea ed during All indications are the CFOG 44, which is located in t.he

'norther quadrant of t.he core, is not a factor in the pone" distribution anomaly which has been observed in the nor" hi~'est qua6x'ant of the core.

On. t he basis e f the forcqoi n-, F'PL believes that fied the reoiii >eriients leveeing to the unco-"r Qratxon of Scctxon it has sat is-into the St. Jucie Unit Yo. l Operati>>g I icense and that.

futu-e. repair or repla<QK" lt of CFTJM 44 i a routine maintenance lnatter. This repair is no ciif fez'oned, from that of. any other CEDN vL>ich fai3.s to opera"e prod lv during t he service life o the rcactox. Repair or rep3.acescent. of CF.D! l 44 vril3. be undertaken in a Nanne which vill not impact the present.

schedule for inspection. anc'. test.in'o resolve t.he observed poi ex'.x.s ribtxtion inc.maly. Accordingly, FP?, reaues s that Section J of. Enclosure ) to the St. Lucie Unit. Yo. l Operating I icense be de le ted..

n Yours verjj t:x-uly, S {p~

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Robert E. Uhri g a Vice President REV/I LI./hlc cc: Nolan C. Noseley, Region XI J ack R Nemnan, Esq .

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