ML14134A184

04/30/2014 Summary of Public Meeting to Discuss an Apparent Violation Identified at Wolf Creek Generating Station

ML14134A184
Person / Time
Site:	Wolf Creek
Issue date:	05/14/2014
From:	Mark Haire Plant Support Branch-1
To:	Heflin A Wolf Creek
P. Elkmann
References
Download: ML14134A184 (16)

Text

May 14, 2014 Mr. Adam C. Heflin, President and Chief Executive Officer Wolf Creek Nuclear Operating Corporation P.O. Box 411 Burlington, KS 66839

SUMMARY

OF PUBLIC MEETING TO DISCUSS AN APPARENT VIOLATION IDENTIFIED AT WOLF CREEK GENERATING STATION

Dear Mr. Heflin,

On April 30, 2014, members of the U.S. Nuclear Regulatory Commission (NRC) staff met with representatives of Wolf Creek Nuclear Operating Corporation at the Region IV office in Arlington, Texas, to discuss an apparent violation identified at Wolf Creek Generating Station. The apparent violation concerned the accuracy of the licand was discussed in NRC Inspection Report 05000482/2013502 (ADAMS ML14092A618). The licensee presented its perspective on the circumstances of the violation and the safety significance. The list of attendees and enclosed. made available electronically for public inspection in the NRC Public Document Room or from the NRC's Agencywide Documents Access and Management System (ADAMS), accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html. To receive a summary of future meetings and other plant-specific e-mail distributions, you must subscribe to the Operating Reactor Correspondence electronic distribution for this plant via http://www.nrc.gov/public-involve/listserver/plants-by-region.html. Once subscribed, if you wish to discontinue receiving electronic distribution, you may unsubscribe at any time by visiting the same web address above. Sincerely, /RA/ V.Gaddy for Mark S. Haire, Chief Plant Support Branch 1 Division of Reactor Safety Docket No. 50-482 License No. NPF-42

Enclosures:

1. List of Attendees 2. WCNOC Presentation Slides

SUNSI Review MSH By: Non-Sensitive Sensitive Publicly Available MSH Non-Publicly Available Keyword: OFFICE DRS/PSB1 DRP/PBB DRP/PBB DRS/PSB1 ACES DRP/CPBB DRS/CPSB1 NAME P. Elkmann C. Peabody D. Proulx G. Guerra R. Browder MHaire/VGaddy SIGNATURE /RA/ /RA/ /RA/ /RA/ /RA/ /RA/ /RA/ DATE 5/6/14 5/8/14 5/6/14 5/8/14 5/7/14 5/7/14 5/9/14 Enclosure 1 List of Attendees NRC Mr. S. Reynolds, Deputy Regional Administrator Ms. K. Fuller, Regional Counsel Mr. J. Clark, Acting Division Director, Division of Reactor Safety Mr. T. Pruett, Deputy Division Director, Division of Reactor Projects Mr. M. Haire, Branch Chief, Plant Support Branch 1, Division of Reactor Safety Mr. N. O Ms. V. Campbell, Branch Chief, Allegation and Enforcement Branch Mr. R. Kahler, Branch Chief, DPR, Office of Nuclear Security and Incident Response Mr. P. Elkmann, Senior Inspector, Plant Support Branch 1, Division of Reactor Safety Mr. C. Peabody, Senior Resident Inspector, Branch B, Division of Reactor Projects Mr. S. LaVie, Senior Specialist, DPR, Office of Nuclear Security and Incident Response Mr. D. Proulx, Senior Project Engineer, Branch B, Division of Reactor Projects Mr. J. Wray, Senior Enforcement Specialist, Office of Enforcement Mr. G. Guerra, Inspector, Plant Support Branch 1, Division of Reactor Safety Ms. R. Browder, Senior Enforcement Specialist, Allegation and Enforcement Branch Wolf Creek Nuclear Operating Corporation Mr. R. Smith, Chief Nuclear Officer Mr. M. Westman, Manager, Regulatory Affairs Mr. T. East, Superintendent, Emergency Planning Mr. W. Ketchum, Supervisor, Engineering Mr. W. Muilenburg, Supervisor, Licensing M. D. Michel, Instructor, Chemistry W o l f C reek Nu c lear O p e r atin g C o rp o r a ti on

R egu l a t o r y C on f e rence Inspec t i on R epo r t 05000482/201 3-5 0 2 P reli mina r y W h i t e F i nd i ng Enclosure 2 W ol f C r ee k Rep r e s en t a t i v es

• R usse l l Sm it h - S it e V i c e P r es i dent

• M i k e W es t ma n - Manage r R egu l a t o r y A f f a ir s

• T i mo t h y East - Supe ri n tenden t E P

• B il l Mu ilenbu r g - Supe r v i so r L i cens i ng

• B il l Ke tchu m - Supe r v i so r Eng i neer

• D a n M iche l - I nstr uc t o r I I Enclosure 2

NRC's Preli m i nary f i nding

• An appa r ent viola tion of 10 CFR 50.54 (q)(2) w as iden t i fied in v ol ving t he f a i lu r e t o ma i n t a in adequa t e me thods f or a ss e ssing t he a c t ual or po t en tial c on sequen c es of a r ad i o l ogi c al eme r gen c y be t ween S ep tember 2012 and N o vember 2013, in a cc o rdan c e w i t h t he r equi remen t s of 10 CFR 50.47 (b)(9).

• The ina cc u r a t e c al cula tion w as c o rr e c t ed on Feb r ua r y 25, 2014.

• The in s pe c t o r s de t e rmined t he failu r e t o ma i n tain a D o s e A ss e ss me nt P r o c e s s capab l e of p r o vid i ng a t e c hn i cally adequa t e e s tima t e of o f f s i t e do s e. This i ss ue has been en t e r ed in t o t he li c en s ee's c o rr e ct i v e a c tion s y s t em as Condition Repo r t 2013-0076 2 47. Enclosure 2 Roo t Cau se Ev alua t io n Findings

• R OO T CAUS E - I n f o rm a t i on S ys t e m s (I S) p rocedu res and gu idance d i d not r equ i r e co m p r ehens i ve ve r i f i ca t i on and va li da t i on f or r i sk s i gn i f icant so ft w a r e.

• C O N T R I BU T I N G CAUS E 1 - Less t han adequa t e E P ove r s i ght of r i sk s i gn i f icant d r ill-i den t i f i ed issues.

• Also de t e rm i ned t he EDC P C on t a i n ment S p r ay F il tr a t i on T ogg l e was not f unc t i ona l.

• D e t e rm ined t he EDC P de f i c i enc i es w e r e i n troduced wi t h V e r s i on 3.6 issued i n Feb r ua ry 2003. Enclosure 2 K e y Co rrect i v e Act io ns

• I m prov e E mergenc y P l ann i n g o wnersh ip o f r isk s i gn i f i can t i ssues.

• I m prov e C o m pu t e r Soft w ar e ver i f i cat i o n and va li da ti o n (V&V).

• EDC P w a s correc t e d an d i ssue d Februar y 25, 201 4 i nc l ud i n g bo th f il te r facto r an d con t a i n ment spra y togg l es. Enclosure 2 EDCP Field Team Data 1 1Other Event Trees Calculated Value SGTR Rad Mon Unit Vent & RWVent Rad Mon DBA Meteorology EAL

Enclosure 2 V en t R a d Monito r Detai l (no r ma l mode) Enclosure 2

V en t R a d Monito r Detai l (a cciden t mode)

Enclosure 2 A f f e ct o f t h e De f i cien c ies

• Iodine c on c en t r a tion c an be o v e r e s tima t ed by a f a c t or of t en

• H o w e v e r , c on c en t r a tion is not t he only input t o c al cula ting do s e

• The EDC P de f i cien cies a f f e c t t he do s e

• C on tainment S p r ay ope r a tion > 30 minu t es

• Unit V ent is in a ccident mode w i th ope rable H E P A

• I n t he s e c a s e s , t he I od i ne c on c en t r a tion is de t e rmined u sing an Iodine t o Noble Gas r a tio

• S o, t he r e s u l t is dependent upon t he N ob l e Gas c on c en t r a tio n r a ther than t he iodine c on c en t r a tion Enclosure 2 A f f e ct o f t h e De f i cien c ie s (c on t.)

• T h e ten D e si gn Ba si s Acc i d e nts i n ED CP w e r e r e viewed t o d e t ermi n e the si gn i f i c a nce of t h e d e f i c i e nc i e s. o L O CA a n d Fu el Ha nd li n g Acc i d e n t o N o c r e d i b le s c e n ari os f or c o m b i n i n g d e f i c i e nc i es C o n t a i n m e n t S p ra y T E D E F a c t o r C D E F a c t or L O CA 1.5 1.5 U n it V e n t Filt r a ti o n T E D E F a c t o r C D E F a c t or Fu e l H andli n g Acc. 1.0 1.1 L O CA 3.0 3.8 Enclosure 2 S ummary

• EA L de c i sion ma king w as una f f e c t ed by t he s e de f i cien cies o I n o r de r t o ha ve a dose a ss e ssm en t la r g e enoug h t o c au se an EAL de c la r a tion , plan t c ondi tion s w il l d r i ve de c la r a tions o E DC P c al cula tion s la g plan t c ondi tions

• P AR de c i sion ma king w as una f f e c t ed by t he s e de f i cien cies o I ni t ia l P A R s are plan t c ondi t io n ba s ed o Do se a ss e ssm en t i s u s e d f o r follo w-u p P A R s o r t o p r o ve ini tial P A R s

• One of f i v e EDC P c al cula tion me thods w as a f f e c t ed w i t h t he la r ge s t impa c t in v ol ving a LO C A o Ha d t hi s e v en t a c tuall y o cc u rr ed , a G E woul d ha ve bee n de c la r ed ba s e d o n plan t c ondi tion s and a c o rr e spondin g plan t c ondi tion P AR e v a c ua t in g 0-2 m ile s a r oun d an d 1 0 m ile s do w n w in d w oul d b e m ade o T h e E DC P de f i cien c ie s woul d no t ha ve an y i m pa ct be c au se they woul d no t ha ve bee n u s e d t o de velo p t he se P A R s Enclosure 2 Wolf C r eek Cl os i ng R e m a r ks Ru ss el l S m i t h - Si t e V ice P r e siden t & CN O O

Enclosure 2

A c ro n y m li s t

• EP - E mergen c y P l ann i ng

• EDCP - E mergen c y D o s e C a lc u l at i on Program

• H E P A - H i gh E f fici en c y Part ic u l ate A i r

• L OC A - Lo s s of C oo l ant A cci dent

• T E D E - Total E f fe c t i v e D o s e Equ i v a l ent

• CDE - C o mm i tted D o s e Equ i v a l ent

• EAL - E mergen c y A c t i on Le v el

• P AR - Prote c t i v e A c t i on R e c o mmendat i on

• G E - General E mergen c y

• CNO O - C h i ef N u cl ear Operat i ng O f f ic er Enclosure 2