ML083540469

Duke Energy Carolinas, Llc., Deficiency Report on Defective Digital Optical Isolators

ML083540469
Person / Time
Site:	Catawba, McGuire, Mcguire
Issue date:	12/18/2008
From:	Effinger J Duke Energy Carolinas
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
44732
Download: ML083540469 (4)

Text

12/18/2008 Power Reactor U.S. Nuclear Regulatory Comnnission Operations Center Event Report Paze I Event# 44732 Site: MCGUIRE Notification Date / Time: 12/18/2008 15:54 (EST)Unit: 1 2, Region: 2 State

• NC Event Date / Time: 12/18/2008 (EST)Reactor Type: [1] W-4-LP,[2]

W-4-LP Last Modification:

12/18/2008 Containment Type: ICE COND ICE COND NRC Notified by: JIM EFFINGER Notifications:

JAY HENSON R2 HQ Ops Officer: MARK ABRAMOVITZ WILLIAM RULAND NRR Emergency Class: NON EMERGENCY PART 21 GROUP 10 CFR Section: 21.21 UNSPECIFIED PARAGRAPH Unit !Scram Code RX Crit init Power Initial RX Mode Curr Power Current RX Mode 1 N Yes 100 Power Operation

.100 i Power Operation 2 N Yes 100 Power Operation

.100 Power Operation DEFECTIVE OPTICAL ISOLATORS"Duke Energy Carolinas, LLC (Duke) herein makes the following notification under 1OCFR21.21(d)(3)(i) of defective digital optical isolators.

The isolators are Commercial Grade Items dedicated by Duke. Failure analysis, conducted by the manufacturer, determined that a manufacturing defect with the isolator capacitor will cause the output voltage to drop when the isolator is not energized and there is a very light load on the output. The subject digital optical isolators are Model 175C180, manufactured by E-max Instruments (also known as Electro-Max) 13 Inverness Way, South Englewood, CO.80112.

These digital optical isolators could be utilized in a variety of applications at Duke's McGuire and Catawba nuclear stations.

There are no known applications for these digital optical isolators at Oconee. )Initial Safety Significance:

None. Defective digital optical isolators were never installed.

Duke protocols require the conduct of a pre-installation bench test and a post installation test to assure these isolators perform satisfactorily in service. E-max Instruments has issued a Model 175C180 recall for all uninstalled isolators.

Duke has returned all uninstalled digital optical isolators to the supplier.

Duke is the only known nuclear utility purchasing E-max Instruments Model 175C180 digital optical isolators."The McGuire and Catawba Senior NRC Resident Inspectors were notified of this Part 21 notification on Dec 18, 2008."

DEC 18 2008 16:57 FR MCGUIRE CONTROL RM 704 875 4888 TO NRC P. 01/03 Enclosure 4.2 NRC Event Notification Worksheet RP/O/A/5700/010 Page 1 of 2 STATE: 1THIS IS THE Mý;GUlRE NUCLEAR SITE IN NRC REGION 2 MAKING AN EVENT NOTIFICATION REPORT" NOTIFICATION UNIT CALLER'S NAME CALLBACK TELEPHONE

1. NRC OPERATIONS TIMEIDATE 11A FN S-, 1 -. ] EN 4LZ~10j)I 7(- OPFICER CONTACTED rOEM- or [704),,_8J.9.§L"4 r'V.NT TIME & ZONE EVENT POWER/MODE BEFORE POWER/MODE AFTER 4J4 DATE" (time) (zone)E2VENT CLASSIFICATIONS I-Hr Non-Emerency 8-Hr Non-Emergency IOCFR 50.72(b13 GENERAL EMERGENCY (50.72 bI (a) TS Deviation (72.75)(el)

Spent Fuel Storatge SSC defect.SITE AREA EMERGEFNCY (72,75.)e2)

Spent Fuel Storage depradation.

ALERT (10,52) (a) and (b) Accidental Criticality Fuel Storage related offaiti mndical.OR (72.74) (n) LoDss or theft of SNM UNUSUAL EVENT (50.72 b3 (XID)' Offsitc Medical TRANSPORTATION (10 CFR 20) 4-I Ir Non-Emefency (50.72 b3 (1')(A)) Degradcd Condition MATERIAL/-X POSUR E (10 CFR (5(1,72 b2(I)) , TS Required S/D (50.72 b3 (IAMB)) Unanalyzed Condition 20)OTHER (50.72 b2 (IV)(A)) ECCS Discharge to RCS (50.72 b3 (IV)(A)) Valid Actuation of System o, Id-k 4, .z Icd)c3NLt c ____,_,. listed in Encl. 4.3.(50.72 b2 (IV)(B)) RPS ACtualion

-critical (50.72 b3 (V")(A)) Safe S/D Capability scram (50.72 b2 (XI)) Offsitc Notification (50.72 b3 (V)(8)) RHR Capability (72,75)(bl Deviation from ISFSI (50.72 b3 (V)(C)) Control of Rad Release T.S.f70.50(.)]

SNM Protective action(s)

_ (50.72 b3 (V)(D)) Aecidvonl Milignafion PHYSICAL SECURITY (73.71) (50.72 b3 (X)(III))

Lost ENS (50.72 b3 (X)(I11))

Lost Other Assess./Comms (50.72 b3 (X)(Ill))

Emergeny Sien INOP 24-1 fr. Non-Eniergency Moterial/Exnosure (IOCFR20)(72.75)(d I) Fuel Storage equipmenl failure.(73 App () safeguards vuIlncrabilitics 26,73 Significant events involving fitnos for duty.(70,50(bl))

Contamination event restrictions, (70.50(b2))

Equipment failure (70.50(b3))

Unplunncd medical treatment (70.50(04))

Fire/explosion damage to licen.ed materizo ISFI Certificatc ofCompliance EVENT DESCRIPTION Include: Sysltems a(i~ctd. u.lioatlon's

& their initiating signals, CauLses, Tffuct of wev¢t on plant, actions taken or plunned, etc, Continue on Enclosure 4.2 page 2 of 2 if necessary.

NOTIFICATIONS YES NO WILL ANYTHING UNUSUAL OR NOT UNDERSTOOD?

0 YES 0 NO________________

____ BE NRC RESIDENT (,_ _Explain above)STATE(s) DID ALL SYSTEMS FUNCTION AS YES 0 0 NO REQUIREDi LOCAL -(Explain above)OTHER GOV AGENCIES MODE OF OPERATION EST. ADDITIONAL INFOR ON 1ACK RESTART MEDIA!PRESS RELEASE 2 _ _ UNTIL CORRECTED DATE: 0 YES___ 0 NO APPROVED BY: ______Z.'fIME/DATF:_6C_______/____(caniter) m m dd yy Opcrationa Shift ManagEr/Emergency Coordinator DEC 18 2008 16:57 FR MCGUIRE CONTROL RM 704 875 4888 TO NRC P. 02/03 Enclosure 4.2 NRC Event Notification Worksheet RP/O0A/5700/0 10 Page 2 of 2 RADIOLOGICAL RELEASES:;

CIIECK OR FILL IN APPLICABLE ITEMS (spciric detail./cxplanations should be covcrmd in evcnl description)

[QID R.2LEASE IASEOUS RELEASE UNPLANNED RELEASE {PANNED RELEASE fINGOING rEMNAE ONITORED 1UNMONITORED FSITE RELEASE S."EXCEEDED ALARMS )'VACUATED

'ERSONNFL EXPOSED OR CONTAMINATED FFSITE PROT"CTIVE ACTIONS RECOMMENDED tate rcicatr path in description NOTE: Contact Radiation Shift to obtain the following i9formation.

ILthe notification is due and the infoollation is not available, THEN mark "Not Available-and complete the notification,'Release Rate (Ci/sccl / T.S. LIMIT 1100 GUIDE Total Activity (Ci) % T.S: LIMIT HOG GUIDE Noblc Gas 0.1 Cil/sec 100 Ci Iodine 10 uCi/srx 0.01 Ci I'zrltsrIetc I uCi]a¢e I mCi Liquid (excluding ilnsiiii 10 uCi/miri 0.1 Ci Sdisolved sable ,ases )Liquid (trritum) 0.2 Cilmin 5 Ci;ECORD MONTMOR)s PLANT STACK CONDENSFR/

MAIN STEAM LINE SQ BLOWDOWN OTHER IN ALARM (EMF 35, 36. 37) AIR EJECTOR (UNIT I-EMF 24,25.26.27 (EMF 34)(LMF 33) UNIT 2-EMF 10. Il. 12.13)AD MONITOR READINGS: LARM SL'TPOINTS3 TRIP II'0 T.S.I LIMIT (If applicable)

NOT APPLICABLE NOT APPLICABLE

--mm -RC S OR SO TUBE LEAKS; CHECK OR FILL IN APPLICABLE ITEMS (.qpecific details/explanation.

should be covered in event description)

LOCATION OF THE LEAK (e.g. SG#, valve, pipe. etc.)-LEAK RATE: gpm/gpd T.S. LIMITS EXCEEDED:

SUDDEN OR LONG TERM DEVELOrMF.NT:

LEAK START DATE: TIME: 4OOLANT ACTIVITY:

PRIMARY' SECONDARY (Last Sumple) Xceq oCiiml Xe eq mCnilml LIST OF SAFETY RELATED EQUIPMENT NOT OPERATIONAL; Iodine eq. mci/ml Iodine C9. mCi/rn ENTNT DESCRIPTION (Continued from Enclosure 4.2 page I of 2)

DEC 18 2008 16:57 FR MCGUIRE CONTROL RM 704 875 4888 TO NRC P. 03/03 Duke Energy Carolinas, LLC (Duke) herein makes the following notification under I OCFR21.21 (d)(3)(i) of defective digital optical isolators.

The isolators are Commercial Grade Items dedicated by Duke. Failure analysis, conducted by the manufacturer, determined that a manufacturing defect with the isolator capacitor will cause the output voltage to drop when the isolator is not energized and there is a very light load on the output. The subject digital optical isolators are Model 175C180, manufactured by E-max Instruments (also known as Electro-Max) 13 Inverness Way, South Englewood, CO 80112. These digital optical isolators could be utilized in a variety of applications at Duke's MeGuire and Catawba nuclear stations.

There are no known applications for these digital optical isolators at Oconee.Initial Safety Signifiaance:

None. Defective digital optical isolators were never installed.

Duke protocols require the conduct of a pre-installation bench test and a post installation test to assure these isolators perform satisfactorily in service. E-max Instruments has issued a Model 175C 180 recall for all uninstalled isolators.

Duke has returned all uninstalled digital optical isolators to the supplier.

Duke is the only known nuclear utility purchasing E-max Instruments Model 175C 180 digital optical isolators.

The McGuire and Catawba Senior NRC Resident Inspectors were notified of this Part 21 notification on Dec 18, 2008.)C 88 TOTAL PAGE.03 8*