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

NRC FonM 195 Iz-vB) r U.S. NUCLEAR REGULATORY COMh ON r'JRC DISTRIBUTION FoR -ppRT 50 DOCI(ET MATERIAL DOCKET NUMBER 50-335 Fll E NUMBER To:

Mr. Dennis L. Ziemann FROM:

Florida Power

& Light Company

.Miami, Florida Mr. Robert E. Uhri DATE OF DOCUMENT 8/3/76.

DATE RECEIVED 8/4/7.6 ETTE R 0 ORIGINAL

.QCDeX DESCRIPTION NOTORIZED PflPNCLASSIFI ED PROP INPUT FORM" EN CI.OSU RE NUMBER OF COPIES RECEIVFD One signed copy 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 license~,

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PLANT NAME:

~ St, Lucie gl (4 P) a, j ACKNOWLE9GED DO NOT REMOVE SAFETY ASSXGNED AD:

BRANCH CHIEF:

~OJECT MANAGER:

LIC, ASSTo:

Ziemann Diggs FOR ACTION/INFORMATION ASSX NED AD'RO IIANA L

8 4 76 RJL INTERNALDISTRIBUTION 6 FI NRC PDR I&E OELD GOSSICK & STAFF MIPC CASE ES SYSTEMS SAFETY HEINEMAN SCHROEDER ENGXNEERING MACCARRY KNIGHT SDMEIL PAMLXCKI 8ENAROYA IPPOLITO K RKIJOOD OPERATING REACTORS SITE SA ENVI 0 N

EN PROJECT MANAGEMENT BOYD P

COLLINS HOUSTON PETERSON'ELTZ HELTEMES SKOVHOLT LPDR: Ft. Pierce Fl TIC:

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ACRS CYS HOLDXNG REACTOR SAFE'IIY ROSS NOVAK ROSZTOCZY CHECK AT&I SALTZMAN RUTBERG EXTERNAL DISTRIBUTION NAT LAB:

REG VIE LA PDR CONSULTANTS OPERATIN C

EISENII SHAD BALER GRIiifES BROOKHAVEN I ULRIKSON ORNL CONTROL NUMBER 77@&

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i::S SAG" FRQL's Florida P car

& Iigh" PO Bar'13100 Niani, Florida 3310l QP B.Ylj'F PAGES

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PLUS INSTRUCT'XOc" SHEET f

{305) 552-4640 X<<:ROX ~il0 - Unatteacle8 automatic machi I

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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 U.

S.

Nuclear. Regvlatory Commission bash3.ngton, D. C.

20555 Deax'r.

7.iemann:

REcgyg Rc:

St. Lucio Unit No. l Opec;ati ng License DPR-67 Condition of T,iconse

~Nil-~'-"

Iegule ory Docket File Florida Po! rer s

X.ight Company

(="PL} hereby re.guest.s that Section J of Fncloaure l to the St. Eucic Unit. No. l Operating L'icense bc relet.cc's a Condition of License.

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 at least tL~'o vmer.s."

qg.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 critical under conti tion

~ (i.e.,

coLd) which had not. fix'sK been te" ted for roc drop t imcs, since it was conceivable that t.he plant would bc in a cold critical conait.ion at.

some time. during its 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 happened that.

the second fastest rod. was that controlled by CE'Dt< 44.

Al-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.ity containcB in Technical Speci fica-tion 3. 10 3.

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( COU-'.<TY Q" QZ DK ss 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. this saS.Q document are true and, correct. to the best Qf.ale kGO'19C@e (

X,:liolaHPt1OQ (

an'8 bali&f g BliQ that -le is au=hori ed to execute

"'he c=.ocv~e~t on behalf of sai8 Licessae.

Rober" R. Uhr q Svasc ihec'.".c: swor.

to before me th's CQJ~'f 5!j coDAissz.on QY.pirgs:

NOT'ABY PU~>X C, in am'x' he County of Da&e, S'tD 0 0 Pluri l~f~fIMV $TATc Qf f~~g p7 ~~

Pff<<Qh'h',t5$ 4>$ f<+~',$ p~g, po ~gyp

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August 3r i&76 Page TQ Ponrx,r s L 7 xema~ln Re:

<.8 I,uci q Linct.:4o.

3, Opcx'8.ti 1lg Iicol'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 initially x'eclui red beati J>g the RCS to approxima tele 360<F before the CEDN

, 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 I6, during a maintenar.ce

shutdown, and folLowing

,'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:ithdrae,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 vithdre.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 ineon".i stency successive r,'ithdrawal of the rod the test.

t.en~perature has occurred suf ficieot.ly 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 ity Reviev'roup and are ava$ 3ob3e on "ite for re+'vI by Region IL 26K personnel.

Hilviog sate sf actor i1) co%pl 6 ted the regvircd te tilip g the repair o~

CERN 44 loses any signi r.icgnce it may have had as a Condition of Licar c.

Di.faculty in witMrav:a3. at low temperature now has onl.y operat.ional significance "incc a Sully inserted rod is inhex Qn'tly sa fe Thus the repaix.

0f CHON 4 4 bee orucs more appropriately 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 ificance since FPL has no i.ntenti on of reinstat.ing Technica3.

Speci. ficat: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. ition 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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VOXt Ope;a -ir.r Lice:is'e DPR-C7

'8a".~x.C ion of lex cenGC Aug<-',

1976 boroscopi.. to Qe+cr:.n ne @bethe anv ivat.eria3. obstructions ox'ari icjYsL.'zi.ticMAoiv2.its cg st.

Thc CEQYi co) IH wil3. then be cnc~rgiaad an~ 'he gripocrs

.~ii3.3

'.je exercisac3.

~'he horoscope vill be urea to obsess've their

m. nner of operate on.

Flushing vil1 be x>ader t.aken a, red,ui roc~.

Upon compl.etymon of thi s in-spect 1 0'0 and QQ

~ !Yf the s 948 cogent

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CEDN l 4 vile agan 0 be tested a"

260 P.

The its-ection efforts for CEDN 44 are expect.ed to xequi re one wee ~.

Since replacement t may

. necks

.ax'y, and since reolace~cnt

~oui@ require t~:a weel:s to

cor!)piete vhich wool(',, ',hereby, interfere with the present

, reactor inspectien and t.es in'rop am (the reactor head >rill be o f 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 vill be tea ed during

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

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.

Yours verjj t:x-uly, Robert E. Uhrig Vice President On.

t he basis e f the forcqoi n-,

F'PL believes that it has sat is-fied the reoiii >eriients leveeing to the unco-"r Qratxon of Scctxon 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 ciiffez'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 Iicense be de le ted..

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Nolan C. Noseley, Region XI J ack R

Nemnan, Esq.

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