ML14160A783
| ML14160A783 | |
| Person / Time | |
|---|---|
| Site: | Watts Bar  |
| Issue date: | 06/03/2014 |
| From: | O'Dell J Tennessee Valley Authority |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML14160A783 (3) | |
Text
IMARIM/2#141 (/l/04US.
Nuclear Regulatorv Conmmission On erationn.
Center Event Reonrt Paa e I Power Reactor Event # 50166 Site: WATTS BAR Notification Date I Time: 06/03/2014 14:15 (EDT)Unit: 2 Region: 2 State: TN Event Date I Time: 06/03/2014 (EDT)Reactor Type: [1] W-4-LP,[2]
W-4-LP Last Modification:
06/03/2014 Containment Type: ICE COND NRC Notified by: JIM O'DELL Notifications:
SCOTT FREEMAN R2DO HQ Ops Officer: CHARLES TEAL OMID TABABAI NRO Emergency Class: NON EMERGENCY PART 21/50.55 GROUP EMAIL 10 CFR Section: 50.55(e) CONSTRUCT DEFICIENCY Unit -Scram Code RX Crit Init Power Initial RX Mode Curr Power Current RX Mode 2 N No 0 Under Construction 0 Under Construction WATTS BAR UNIT 2 POTENTIALLY DEFECTIVE FUSES INSTALLED"WBN [Watts Bar Nuclear] Unit 2 (under construction) determined that Littelfuse Part Number FLAS005.T fuses manufactured under three date codes are potentially susceptible to nuisance opening according to Littelfuse letter dated April 30, 2014. Littelfuse Part Number FLAS005.T fuses are commercial grade and dedicated by TVA for use as a basic component in safety related systems. No confirmed examples have been identified that would have created a substantial safety hazard at this time. The potentially defective fuses were purchased for WBN Unit 2 and have been installed on WBN Unit 2 only. No potentially defective fuses have been installed on WBN Unit 1, SQN [Sequoyah]
Units 1 or 2, or BFN [Browns Ferry Nuclear] Units 1, 2, or 3. At this time, there is no safety significance because fuel has not been loaded on WBN Unit 2. Installed and potentially defective Part Number FLAS005.T fuses will be replaced prior to obtaining a WBN Unit 2 Operating License. This issue has been documented in TVA's corrective action program as Problem Evaluation Report 878252 and is being conservatively reported by WBN Unit 2 under 10 CFR 50.55(e)." The licensee has notified the NRC Resident Inspector.
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NRC FORM 361 U.S. NUCLEAR REGULATORY COMMISSION (12-2000)
OPERATIONS CENTER REACTOR PLANT EVENT NOTIFICATION WORKSHEET EN #NRC OPERATION TELEPHONE NUMBER: PRIMARY -- 301-816-5100 or 800-532-3469*, BACKUPS -- [1st] 301-951-0550 or 800-449-3694*,[2nd] 301-415-0550 and [3rd] 301-415-0553
- Licensees who maintain their own ETS are provided these telephone numbers.NOTIFICATION TIME FACILITY OR ORGANIZATION UNIT NAME OF CALLER CALL BACK #-------- Watts Bar Nuclear Plant 2 Jim O'Dell See below.EVENT TIME & ZONE EVENT DATE POWER/MODE BEFORE POWER/MODE AFTER N/A 4/30/2014 N/A N/A EVENT CLASSIFICATIONS 1-Hr. Non-Emergency 10 CFR 50.72(b)(1)
[: (v)(A) Safe S/D Capability AINA E] GENERAL EMERGENCY GEN/AAEC 0[ TS Deviation ADEV E] (v)(B) RHR Capability AINB[] SITE AREA EMERGENCY SIT/AAEC 4-Hr. Non-Emergency 10 CFR 50.72(b)(2)
[] (v)(C) Control of Rad Release AINC El ALERT ALE/AAEC El (i) TS Required S/D ASHU El (v)(D) Accident Mitigation AIND[l UNUSUAL EVENT UNU/AAEC [] (iv)(A) ECCS Discharge to RCS ACCS [j (xii) Offsite Medical AMED E 50.72 NON-EMERGENCY (see next columns) (iv)(B) RPS Actuation (scram) ARPS El (xiii) Loss Comm/Asmt/Resp ACOM El PHYSICAL SECURITY (73.71) DDDD (xi) Offsite Notification APRE 60-Day Optional 10 CFR 50.73(a)(1)
E MATERIAL/EXPOSURE B??? 8-Hr. Non-Emergency 10 CFR 50.72(b)(3)
El Invalid Specified System Actuation AINV E FITNESS FOR DUTY HFIT El [(ii)(A) Degraded Condition ADEG Other Unspecified Requirement (Identify)
El OTHER UNSPECIFIED REQMT. (see last column) El (ii)(B) Unanalyzed Condition AUNA 2[ 10CFR50.55(e)
NONR El INFORMATION ONLY NINF E]l (iv)(A) Specified System Actuation AESF ,1 NONR DESCRIPTION Include: Systems affected, actuations and their initiating signals, causes, effect of event on plant, actions taken or planned, etc. (Continue on back)WBN Unit 2 (under construction) determined that Littelfuse Part Number FLAS005.T fuses manufactured under three date codes are potentially susceptible to nuisance opening according to Littelfuse Letter dated April 30, 2014. Littelfuse Part Number FLAS005.T fuses are commercial grade and dedicated by TVA for use as a basic component in safety related systems. No confirmed examples have been identified that would have created a substantial safety hazard at this time. The potentially defective fuses were purchased for WBN Unit 2 and have been installed on WBN Unit 2 only. No potentially defective fuses have been installed on WBN Unit 1, SQN Units 1 or 2, or BFN Units 1, 2, or 3. At this time, there is no safety significance because fuel has not been loaded on WBN Unit 2. Installed and potentially defective Part Number FLAS005.T fuses will be replaced prior to obtaining a WBN Unit 2 Operating License. This issue has been documented in TVA's corrective action program as Problem Evaluation Report 878252 and is being conservatively reported by WBN Unit 2 under 10 CFR 50.55(e).Licensing Contacts: Jim Odell (423) 365-3818 Gordon Arent (423) 365-2004 Tom Metzler (423) 365-7754 Technical Contact: Steve Hilmes (423) 365-3286 NOTIFICATIONS YES NO WILL BE ANYTHING UNUSUAL OR YES (Explain above) NO NRC RESIDENT 2 El El NOT UNDERSTOOD?
STATE(s) E_ El []El DID ALL SYSTEMS YES NO (Explain above)LOCAL [ [] El FUNCTION AS REQUIRED?
YE OTHER GOV AGENCIES MODE OF OPERATION ESTIMATED ADDITIONAL INFO ON BACK OEl UNOE COFPERATIN RESTART DATE: N/A MEDIA/PRESS RELEASE El [ El UNTIL CORRECTED2 N/A (MM/DD/YYYY)
[] YES NO NRC FORM 361 (12-2000)PAGE I OF 2 NRC FORM 361 REACTOR PLANT (12-2000)EVENT NOTIFICATION WORKSHEET (CONTINUED)
ADDITIONAL INFORMATION RADIOLOGICAL RELEASES:
CHECK OR FILL IN APPLICABLE ITEMS (specific details/exelanations should be covered in event description)
II LIQUID RELEASE JEIZ GASEOUS RELEASE F- UNPLANNED RELEASE D--I PLANNED RELEASE El ONGOING [--I TERMINATED
[] MONITORED ILIIUNMONITORED
[ OFFSITE RELEASE lizi T. S. EXCEEDED 1w RM ALARMS I IAREAS EVACUATED PERSONNEL EXPOSED OR CONTAMINATED LI OFFSITE PROTECTIVE ACTIONS RECOMMENDED
- State release path in description Release Rate (Cilsec) % T. S. LIMIT HOO GUIDE Total Activity (Ci) % T. S. LIMIT HOO GUIDE Noble Gas 0.1 Cilsec 1000 Ci Iodine 10 uCilsec 0.01 Ci Particulate I uCilsec I mCi Liquid (excluding tritium and 10 uCilmin 0.1 Ci dissolved noble gases)Liquid (tritium) 0.2 Ci/min 5 Ci Total PLANT STACK CONDENSERPAIR EJECTOR MAIN STEAM LINE SG BLOWDOWN OTHER RAD MONITOR READINGS ALARM SETPOINTS% T. S. LIMIT(if applicable)
RCS OR SG TUBE LEAKS: CHECK OR FILL IN APPLICABLE ITEMS: (specific details/explanations should be covered in event description)
LOCATION OF THE LEAK (e.g., SG #, valve, pipe. etc.)LEAK RATE UNITS: gpm/gpd T. S. LIMITS SUDDEN OR LONG-TERM DEVELOPMENT LEAK START DATE TIME COOLANT ACTIVITY PRIMARY SECONDARY AND UNITS: LIST OF SAFETY RELATED EQUIPMENT NOT OPERATIONAL EVENT DESCRIPTION (Continued from front)NRC FORM 361 (12-2000)PAGE 2 OF 2