ML17221A686

LER 88-002-00:on 880218,reactor Containment Bldg Polar Crane Power Supply Breaker Found in Tagged Open Position.Caused by Personnel Error.Reactor Containment Bldg Polar Crane Power Supply Breaker Locked open.W/880321 Ltr

ML17221A686
Person / Time
Site:	Saint Lucie
Issue date:	03/19/1988
From:	Conway W, Mendoza V FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
L-88-140, LER-88-002-03, LER-88-2-3, NUDOCS 8803280152
Download: ML17221A686 (5)

Text

,ACCEIZRLTED DISHUTION DEMONSTRX'N SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:8803280152 DOC.DATE: 88/03/19 NOTARIZED: NO DOCKET FACIL:50-389 St. Lucie Plant, Unit 2, Florida Power & Light Co. 05000389 AUTH. NAME AUTHOR AFFILIATION MENDOZA,V.N. Florida Power & Light Co.

CONWAY,W.F. Florida Power & Light Co.

RECIP.NAME RECIPIENT AFFILIATION

SUBJECT:

LER 88-002-00:on 880218,reactor containment bldg polar crane power supply breaker found not locked.

W/8 ltr.

DISTRIBUTION CODE: IE22D COPIES RECEIVED:LTR ENCL SIZE:

TITLE: 50.73 Licensee Event Report (LER), Incident Rpt, etc.

NOTES:

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD2-2 LA 1 1 PD2-2 PD 1 1 TOURIGNY,E 1 1 INTERNAL: ACRS MICHELSON 1 1 ACRS MOELLER 2 2 AEOD/DOA 1 1 AEOD/DSP/NAS 1 1 AEOD/DSP/ROAB 2 2 AEOD/DSP/TPAB 1 1 ARM/DCTS/DAB 1 1 DEDRO 1 1 NRR/DEST/ADS7E4 1 0 NRR/DEST/CEB8H7 1 1 NRR/DEST/ESB SD 1 1 NRR/DEST/ICSB7A 1 1 NRR/DEST/MEB9H3 1 1 NRR/DEST/MTB 9H 1 1 NRR/DEST/PSBSD1 1 1 NRR/DEST/RSB 8E 1 1 NRR/DEST/SGB 8D 1 1 NRR/DLPQ/HFB10D 1 1 NRR/DLPQ/QAB10A 1 1 NRR/DOEA/EAB11E 1 1 NRR/DRE P/RAB1 OA 1 NRR/DREP/RPB10A 2 2 G FIX@

I NRR/DRI S/S B9A1 02 1

1 1

1 NRR/PMAS/ILRB12 RES TELFORD,J 1

1 1

1 S jjDE/EIB 1 1 RES/DRPS DIR 1 1 RGN2 FILE 01 1 1 EXTERNAL: EG&G GROH,M 4 4 FORD BLDG HOY,A 1 1 H ST LOBBY WARD 1 1 LPDR 1 1 NRC PDR 1 1 NSIC HARRIS,J 1 1 NSIC MAYS,G 1 1 D

S A

D TOTAL NUMBER OF COPIES REQUIRED: LTTR 45 ENCL 44

NRC Form 3$ $ U.S. NUCLEAR REGULATOAY COMMISSION 1$ .$ 3 I APPROVEO OMB NO. 3150-010(

LICENSEE EVENT REPORT {LER) EXPIRES: SI31ISS FACILITY NAME (1) OOCKFl'UMSER (2) PAGE 3)

St. Lucie Unit 2 0 5 0 0 0 3 8 9 1 OF 0 3 TITLE (e)

REACTOR CONTAINMENT BUILDING POLAR CRANE POWER SUPPLY BREAKER FOUND IN ITS REQUIRED TAGGED OPEN POSITION BUT NOT LOCKED DUE TO PERSONNEL ERROR EVENT DATE(5) LER NUMSEA ($ ) REPORT DATE (7) OTHER FACILITIES INVOLVED ($ )

MONTH OAY YEAR YEAR SEQUENTIAL grin Ae VerON MONTH DAY YEAR FACILITY NAMES DOCKET NUMSERISI NVMSEA NVMSSA N/A 0 5 0 0 0 0 2 18 888 031 988 0 5 0 0 0 THIS REPORT IS SUSMITTEO PURSUANT T 0 THE REOUIREMENTS OF 10 CFR ()! ICnece one or more of tne fogowingi (11)

OPERATING MODE ISI 20.e02($ ) 20.$ 0$ (cl 50.73(el(2)(ivl 73.71(e)

POWER 20.$ 0$ (e)(I ) (Il 50.3$ (el(1) 50.73(e) (2 l(el 73.71(cl 1 0 0 20 $ 054)(1)($ ) 50.3$ ( ~ ) (2) 50.73(el(2)(vr)l OTHER ISpecify rn Apt(rect oelow end in Tent, iYRC Form 20.$ 05(e) (1)(XII 50.73(e) (2) II) 50.73( ~ ) (2) lriiil (Al JSSXI 20AOSlel(1)((vl 50.73(eH2) IS) 50.73( ~ ) (2)(viiil($)

20.e0$ lel (I I (vl 50.73(e) (2 I(ill) S0.73( ~ l(21(el LICENSEE CONTACT FOR THIS LER (12I NAME TELEPHONE NUMSER Mendoza, Shift Technical Advisor AREA CODE V. N.

COMPLETE ONE LINE FOR EACH COMPONENT FAILUAE OESCRISED IN THIS REPORT 113) 30465-3550 MANUFAC. EPORTASLE MANUFAC EPORTASLE CAUSE SYSTEM COMPONENT TO NPROS CAUSE SYSTEM COMPONENT TURER TUREA TO NPAOS tetr'> 'r) jQ)

SUPPLEMENTAL REPORT EXPECTED (Ie) MONTH OAY YEAR EXPECTED SUSMISSION DATE II 5 I YES IIIyer, compNte EXPECTED SVSMISSION OA TEI NO ASETAAGT ILimit to Ie00 tpecee, i.e., epproeiinetely Iiheen ingle epece typewrfnen Iieet) (1$ )

On February 18, 1988, St. Lucie, Unit I2 was in Mode 1, 100% power and at steady state conditions. During a. routine surveillance inspection by plant Quality Control personnel, the Reactor Containment Building IRCB) (EIIS-NH) polar crane power supply breaker was discovered to be in its required rendered inoperable open position, tagged in the open position with a controlled clearance tag, but was not locked in the open position. This constituted a violation of the plant's Technical Specification and plant operating procedure.

The root cause of the event was a cognitive personnel error on the part of the Assistant Nuclear Plant Supervisor who reviewed the surveillance procedure performed on the RCB polar crane power supply breaker, by misinterpreting that the clearance tag hung on the breaker had met the intent of the Technical Specifications as well as the plant operating procedure. A contributing factor to the misinterpretation is the fact that the RCB polar crane power supply breaker for St: Lucie Unit I)1 is not required by procedure nor by the Technical Specifications to be locked open, but rather only required to be tagged open by means of a controlled clearance tag.

As an immediate corrective action, the RCB polar crane power supply breaker was locked open. "

St. Lucie Unit N2 remained at mode 1, 100% power during the event. At no time was the plant safety nor the health and safety of the public endangered.

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NRC Fort 880 p iR 3280gg2 IS $ 3r

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05000389, DCD

NRC Form 366A U.S.'NUCLEAR REGULATORY COMMISSION (983)

LICENSEE E T REPORT (LER) TEXT CONTINUA APPROVEO OMS NO. 3150&104 EXPIRES: 8/31/68 FACILI'TY NAME (1) OOCKET NUMBER (21 LER NUMBER (6) PAGE (3)

UENTIAL REVISION YEAR NUMBER NUMBER St. Lucie Unit 2 o s o o o 3 8 9 8 8 0 0 2 0002 OF 0 3 TfxT llfmors s/Moo is r/q/rr)od, uso sdd/I/oos/Ill(C Form 3/)84's/ (IT)

DESCRIPTION OF EVENT.

On February 18, 1988, St. Lucie Unit II2 was at mode 1, 100% power, and at steady state conditions. During a routine surveillance inspection by plant Quality Control personnel, the Reactor Containment Building (RCB) (EIIS-NH) polar crane power supply breaker I)2-40514 was found tagged in the open position with a controlled clearance tag but not locked, The plant's Technical Specifications as well as plant operating procedures require that this breaker shall be rendered inoperable by locking the power supply breaker open, while the plant is in modes 1 and 2. St. Lucie Unit I)2 had just completed its refueling outage November 21, 1987, and by procedure the RCB polar crane was to have been verified as being rendered inoperable by having its power supply breaker in the locked open position and have a controlled clearance tag to be in the open position prior to entering mode 2. Furthermore, a monthly surveillance is performed on this breaker to ensure The latest surveillance performed was on February 16, 1988.

it is inoperable and locked open.

Investigation revealed that there was no reason for removing the breaker lock from the time of its last performed surveillance to the time of discovery. It was conservatively presumed that the breaker was rendered inoperable by means of the controlled clearance tag only but not locked. It could only be speculated that the breaker was never locked since November 21, 1987.

CAUSE OP THE EVENT:

The root cause of the event was a cognitive personnel error on the part of the Assistant Nuclear Plant Supervisor who reviewed the surveillance procedure on the RCB polar crane power supply breaker. He misinterpreted that the clearance tag hung on the breaker had met the intent of the Technical Specifications as well as of the plant operating procedure. A contributing factor to the misinterpretation was the fact that the St. Lucie Unit IIl Technical Specifications as well as the'Unit I)l operating procedure do not require the Unit I)1 RCB polar crane breaker to be locked. It is only required to be in the open position with a controlled clearance tag. This 'personnel" error was a result of not adequately following an approved procedure. There were no unusual characteristics of the work location that directly contributed to this error.

NRC FORM SBBA ISS)31

NRC form 3ddA U.S. NUCLEAR REGULATORY COMMISSION (943)

LICENSEE'EV T REPORT (LER) TEXT CONTlNUAT APPROVEO OMS NO. 3(50M(04 EXPIRES: 8/31/88 FACILITY NAME ll) OOCKET NUMSER (3)

(.ER NI)MSER (8) PAGE (3)

YEAR SEOVSNTIAL rr 8 v rs lo N NUMeee NUMedll St. Lucie Unit 42 o s o o o 3 8 8 8 0 0 2 00 03 OFO. 3 TEXT ////rroro oAooo /o ror/oiror/. o>> ///Ooro//YRC %%drrn 3////A9) (17)

ANALYSIS OP THB EVENT:

The as found condition of the breaker being in the unlocked position has no significant impact on the safety of the plant. In some cases where certain equipment is required to be in the locked position but can not be physically locked, the controlled clearance tag is considered as an acceptable alternate for the locking device and considered as meeting the intent of the locking requirement. In this event involving the RCB polar crane power supply breaker, the unlocked condition of the breaker would not have any impact since the controlled clearance tag serves the same purpose as the locking device. By plant procedure, no equipment rendered inoperable under a controlled clearance tag can be operated without releasing the clearance and approved by the Nuclear Plant Supervisor or his designee. At no time during the event was the health and safety of the public as well as the safety of the plant endangered.

CORRBCTIVB ACTIONS =

l. Operations personnel immediately locked the RCB polar crane power supply breaker.

2. The individual was advised of the proper interpretation of the Technical Specifications as well as of the procedu're.

3. The Operations Supervisor will assess the need for further training of operations personnel on this item.

ADDITIONAL INPORlQLTION8 Failed Component Identification:

There was no component failure during this event.

Previous Similar Event:

This was the first event where a breaker was found .to be in the unlocked position.

NAC FORM 3edA (94)3)

P. O. BOX '4000, JUNO BEACH, FL 33408 0420 MARCH 2 1 1988 L-88-140 10 CFR 50.73 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C. 20555 Gentlemen:

Re: St. Lucie Unit 2 Docket No. 50-389 Reportable Event: 88-02 Date of Event: February 18, 1988 Reactor Containment Building Polar Crane Power Supply Breaker Found in Its Required Tagged 0 en Position But Not Locked Due to Personnel Error The attached Licensee Event Report is being submitted pursuant to the requirements of 10 CFR 50.73 to provide notification of the subject event.

Very truly yours, W. P. Conw y Acting 4~~ice Nuclear Energy President WFC/GRM/gp Attachment cc: Dr. J. Nelson Grace, Regional Administrator, Region II, USNRC Senior Resident Inspector, USNRC, St. Lucie Plant GRM2/029. LER an FPL Group company