ML13066A331

Regulatory Conference Presentation 3-12-2013

ML13066A331
Person / Time
Site:	Kewaunee
Issue date:	03/07/2013
From:	Dominion Energy Kewaunee
To:	NRC/RGN-III/DRMA
References
EA-12-272
Download: ML13066A331 (20)

Text

KewauneePower Kewaunee Power Station NRCRegionIII NRC Region IIIRegulatory Conference Loss of PPCS Indication For SPING RMs© 2007 Dominion A g enda g*O p enin g remarks pg*Event descriptionRltiifi*R egu l a t ory s i gn ifi cance*Conclusion

• Closing remarks 2© 2007 Dominion O p enin g Remarks pg Dominion is committed to preserving the health and ftfthbli sa f e t y o f th e pu bli c 3© 2007 Dominion O p enin g Remarks pg*Preliminar y Violation y*10 CFR 50.54 (q)(2) & 10 CFR 50.47 (b)(4)

-Kewaunee Power Station's unidentified loss of SPING indication on the PPCS and RADSERV stations precluded action to restore the ca p abilit y to classif y EALs RG1.1 pyy and RS1.1*Agree performance deficiency existed

• Differwithsignificanceoffinding

• Differ with significance of finding 4© 2007 Dominion Event Descri p tion p*Hardware failure

• RADSERV*Interface between SPING units and PPCS

• Additional Data Acquisition Modules lost

• Local SPING indication remained available

• Upon discovery of RADSERV failure, restoration completed same day 5© 2007 Dominion Re g ulator y Si g nificancegygRADSERV failure-Hardware issuePihdfilhb P rev i ous h ar d ware f a il ures h ave b een evaluated under 10CR5047(b)(8) 10 CR 50.47(b)(8)6© 2007 Dominion Re g ulator y Si g nificancegyg5.8 10 CFR 50.47(b)(8), Emergency Facilities and Equipment PLANNING STANDARD: *Adequate emergency facilities and equipment to support the emergency response are provided and maintained.

PS FUNCTIONS: 1.Adequate facilities are maintained to support emergency response.

2.Adequateequipmentismaintainedtosupport 2.Adequate equipment is maintained to support emergency response.

7 Re g ulator y Si g nificancegyg*NUREG 0654

• H. Emergency Facilities and Equipment

• 5.b. radiological monitors, (e.g., process, area, emergency, effluent, wound and portable monitors and sampling equipment);

8© 2007 Dominion Re g ulator y Si g nificancegyg10 CFR 50.47 (b)(8)()()*White threshold

-Equipment necessary to implement the E-plan is not available or not functional

• Period of longer than 7 days from time of discover y y*Without Compensatory Measures 9© 2007 Dominion Re g ulator y Si g nificancegyg10 CFR 50.47 (b)(8)()()*Green threshold

-A significant amount of equipment necessary to implement the E-plan is not available or functional to the extent that any key ERO

member could not p erform his/her assi g ned pgfunctions, in the absence of compensatory

measures.10© 2007 Dominion Re g ulator y Si g nificancegygIMC0609Basis IMC 0609 BasisNot all hardware failures under control of licensee Assessed by scope of outage from discover y*RADSERV failure*Hardware failure y*Restored same day of discovery 11© 2007 Dominion Re g ulator y Si g nificancegyg*Industr y OE y*Columbia Generating Station (05000397/2012502)FidiStddSiifi Fi n di ng St an d ar d Si gn ifi canceEffluent Monitor Classification Thresholds10 CFR 50.47(b)(4)WhiteInaccurate methods for assessing the offsite consequences of a radiological release were inaccurate10 CFR 50.47(b)(9)White Reactor Building High RangeExhaust monitor was unavailable 38 of 149 months and corrective actions were ineffective in restoring the availabilityandreliabilityofthe10 CFR 50.47(b)(8)Green -Licensee Identified 12© 2007 Dominionavailability and reliability of the monitor Re g ulator y Si g nificancegyg*Columbia Green Findin g g*10 CFR 50.47 (b)(8)

• FailedtoprovideandmaintainRXBuilding Failed to provide and maintain RX Building High Range Exhaust RM

• Unavailable 38 out of 149 months

• Planning Standard determined to be degradedCittildl*C aus i n g po t en ti a l d e l a y s*Classification and radiological assessments 13© 2007 Dominion Re g ulator y Si g nificancegyg*Columbia White Findin g g*Finding*10 CFR 50.54(q) and 10 CFR 50.47(b)(4)

• Failure to maintain a standard EAL scheme

• Inappropriately calculated and changed RM thresholdsforSiteAreaEmergencyand thresholds for Site Area Emergency and General Emergency 14© 2007 Dominion Additional Information

• Actual duration of vulnerabilit y y*Fast breaking LOCA

• RCS>350°Fon3/24/11at0300 RCS 350 F on 3/24/11 at 0300*Six days*ClassificationMethodology

• Classification Methodology

• Shift Manager perspective 15© 2007 Dominion Additional Information

• EAL scheme diversification

• NEI 99-01 Rev. 4

-Fission product barrier challenges

-Effluent ICs do not stand alone

-EOPs and CSF reduce ambiguity and time

• NRC Regulatory Analysis of NEI 99-01

-Plant conditions more timely than radiologicalmeasurements radiological measurements 16© 2007 Dominion Root Cause Evaluation RC-1Absence of a programmatic requirement to pe ri od i ca ll y m o ni to r RAD S ER V a n d topeodcayotoSVad PPCS RC-2 RC 2System platform is obsolete and difficult tomaintain to maintain 17© 2007 Dominion Conclusions

• RADSERV failure was a hardware issue

• Restored same day as discovery

• 10CFR5047(b)(8)GreenFinding

• 10 CFR 50.47 (b)(8) Green Finding*Precedence of the Columbia finding 18© 2007 Dominion Closin g Remarks g*Dominion Acknowled g es g*Degraded planning standard

• ImportanceofequipmentassociatedwithEP Importance of equipment associated with EP*Violation has occurred

• Correctiveactions Corrective actions 19© 2007 Dominion Closin g Remarks g Dominion is committed to preserving the health and safetyofthepublic safety of the public 20© 2007 Dominion