ML20217K313

Forwards Partial List of Attendees & Handouts Provided During Conference on 970620.Decision Re EA Forthcoming by Separate Correspondence

ML20217K313
Person / Time
Site:	Byron
Issue date:	08/01/1997
From:	Grant G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:	Graesser K COMMONWEALTH EDISON CO.
References
50-454-97-05, 50-454-97-5, 50-455-97-05, 50-455-97-5, EA-97-200, NUDOCS 9708150193
Download: ML20217K313 (29)

Text

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August 1. I TH a.e

-n-CA 97 200 ] ](T D Mr. K. Graesser Sito VsCO Pr05idOnl Byron Station Commonwealth Edison Company 4450 N. German Church Road Byron, IL 61010

SUBJECT:

NRC PREDECISIONAL ENFORCEMENT CONFERENCE REPORT

Dear Mr. Graesser:

This refers to a Predecisional Enforcement Conference conducted by Mr. A. B:ll Beach, Regional June Administrator, end other members of the Region 111 and Headquarters staff on 20,1997.

The sub}ect of this conference was the apparent violations at Byron Station identitled in NRC Inspection Report Nos.

50 454/97005(DRP): 50 455/97005(DRP) concerning the blockage of the Unit 2 containment floor drains. We have enclosed a

' partiallist of attendees (Enclosure 1) and a copy of the handout you provided during the conference (Enclosuro 2).

You will be notiflod by separate correspondence of our decision regarding the enforcement action based on the information presented and discussed at the Predocisional Enforcement Conference. No responso is required until you are notified of the proposed enforcoment action, in accordance with 10 CFR 2.790 of the Commission's regulations, a copy of this letter and the enclosed report will be placed in the NRC Public Document Room.

We Conference.

will gladly discuss any questions you have concerning this Predocisional Enforcement Sincerely,

\

/s/ M. Dapas for Geof froy E. Grant, Director Division of Reactor Projects Docket Nos. 50 454; 50 455 Licenses Nos. NPF-37: NPF 66

Enclosure:

NRC Predecisional Enforcement Conference Report SAqAltached Olstribution and Concurrene_q 1.DOCUMENT  % . n . w. NAME: 4 G:\BYRO.lR\BYR97005.ENF wa v . m. n w v wi c - con .*i i .a-e- au..a t . con e .a.a .u.aa..

OFFICE Rill Rlli Rill Ritt Rill NAME- TTongue:nh RLanksbury HClayton BBorson DATE 081 /97 GGrant 081 /97- 08/- /97 08/ /97 08/-/97 OMICI AL fiEUDhD~CDFY OR

e N e August 1, 1997 I l

EA 97 200  !

1 fAr. K. Grausser 1

Sito Vice President i ilyton Station -  !

Cominonwealth Edison' Company 4450 N. Gerrnan Church Rnad j Byron, IL - 61010 i t

SUBJECT:

NRC PREDECISIONAL ENFORCEMENT CONFERENCE REPORT

Dear Mr. Graesser:

This refers to a Predecisional Enforcement Conference conducted by Mr. A. Bill Bea Regional June Administrator, and other members of the Region 111 and Headquarters staff o 20,1997.

, The sub}ect of this conference was the apparent violations at Byron

. Station identified in NRC inspection Report Nos. 50 454/97005(DRP); 50 455/97ii concerning the blockage of the Unit 2 containment floor drains. We have enclosed a -

~ teport surnmarizing the discussion. ,

4 .

You will be notified by separate correspondence of our decision regarding the enforcI action based on the information presented and discussed at the Predecisional Enfor Conference.

action. No response is required until you are notified of the proposed enforcemen

~

In accordance with 10 CFR 2.790 of the Commission's regulations, a copy of this letter  ?

and the enclosed report will be placed in the NRC Public Document Room.  ;

We will gladly discuss any questions you have concerning this Predecisional Enfcrcem Conference.

1 Sincerely, i

/s/ M. Dapas for >

Geoffrey E. Grant. Director Division of Reactor Projects Docket Nos. 50 41,4; 50-455 .;

Licenses Nos. NPF 37; NPF-66  :

Enclosure:

NRC Predecisional Enfcrcement Conference Report See Attached Distribution '

- i.m.i DOCUMENT NAME: G:\BYR

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. .,m.- me Om lRtBYR97005.ENF m.e. e c m .e-,

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OFFICE Rill Y. Rill : y, Ritt .

NAME TTongue:rhet Alanksburg HCleyto" AC.,

.Q IR- -/ Rill - ( .,

I DATE 08/or/97.

BBerg GGrantg@

'08/d//97 ' 08/*l/97 7/97N {

OFFICIAL RECORD COPY . 08// /97

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, s K. Graessor 2-cc w/o encti T. J. Maiman, Senior Vice President Nuclear Operations Division D. A. Sagor, Vice President, Generation Support H. W. Keiser, Chief Nuclear Operating Officer K. Kofton, Station Manager D. Brindle, Regulatory Assurance Supervisor- -

l. Johnson, Acting Nuclear Regulatory Services Manager cc w/ encl: Richard Hubbard Nathan Schloss, Economist Office of the Attorney General State Liaison Officer, Wisconsin -

State Liaison Officer Chairman, Illinois Commerce Commission Document Control Desk l.icensing i

DJstribution:

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Docket File w/enci OC/LFDCB w/enci SRI Byron, Braldwood, Zion w/ encl QRP w/enct Project Manager, NRR w/enct fUBLIC IE 01 w/enct

, A. B. Beach, w/enct CAA1 w/enci (E mail)

. Rlli Enf. Coordinator, w/enct RAC1 (E Mail) w/ encl Deputy RA, w/ encl  ;

Rlli PRR w/enct TSS w/enct DRS (2) w/enci -

J. Lieberman, OE DOCDESK (E-mail)

J. Goldberg, OGC R. Zimmerman, NRR  ;

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I Enclosure 1 i

1.

Dttial List of PQfiQns. Pros 20t at Conference Commonwo3htLEdison Comnany (Comed)

K. Graesser, Site Vice President I

K. Kofron, Plant General Manager "

T. Gierith, Operations Manager D. Wozniak, Engineering Manager D. Brindle, Regulatory Assurance Supervisor U..SmNucleaLBagulatorv commlanlon A. B. Beach, Regional Administrator, Rlll G. Grant, Director, Division of Reactor Projects R. Capra, Director, Project Directorate 1112, NRR -

J. Jacobson, Acting Deputy Director, Division of Reactor Safety

- B. Berson, Regional Counsel R. Lanksbury, Chief, Projects Branch 3 T. Tongue, Projects Engineer '

N. Hilton, Resident inspector K. Selburg, Radiation Specialist During the meeting the apparent violations identified during the inspection were discussed, along with the corrective actions taken or planned by you. The apparent violations involved: (1) failure to meet the Technical Specification action statement when the Unit 2 containment floor drain system was inoparable; and (2) failure to conduct a 10 CFR 50.5g safety analysis for a modification to the Unit * ~ '

2 containment floor drain grates that were not as described in the UFSAR.

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j Byron Nuclear Power Station i

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i CONTAINNIK5T FLOOR

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DRATN SYSTEMISSUES i i

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l PRE-DECISIONAL ENFORCEMENT CONFERENCE .

JUNE 20,1997 REGION III

1 AGEXDA -

f Opening Remarks K. Graesser 4 -

RF System Description, D. Wozniak 50.59 Issue and System Operability Issue Operator Identification Issue T. Gierich LERIssue D. Brindle Conclusions K. Graesser .

1 I 2

Opening Remarks Apparent violations

-No safety evaluation Agree

-RF system inoperable Disagree

-Opportunity to identify inoperability Disagree

-Inaccurate LER Disagree i

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CONTAINMENT BUILDING FLOOR DRAIN SYSTEM BLOCK DIAGRAM I

i UWTAMENT OUTER TRENCH Elev. 377'

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\ WERBOK OLSTORAGE VAULT

Lack Of 50.59 For Missing Grating '

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Self-identifiec FSAR description does not match as-built plant No 50.59 safety evaluation performed Floor drain bar grates not installed per drawings Several different type drain grates installed Condition existed since original construction Plant configuration must be consistent with FSAR 5

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Lack Of 50.59 For Missing Grating - cont.

t Corrective Actions

- Lessons learned from SX event -

- Operability assessment was performed

- RF system was determined operable ,

- Long term actions to be completed during each unit's next refueling outage i

4 6

Lack Of 50.59 For Missing Grating - cont. -

4 Safety Significance -

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- Health and safety of public not impacted

- Safe shutdown systems not affected

- Safe reactor conditions maintained t

7  !

Degraded RF System -

RCFC Surveillance

- Investigated surveillance dates

- Investigated chart recorder traces

- Data shows atypical characteristic curves 4

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RF ALARM & CHART RECORDER ACTIONS FOR PERIOD OF 10/27/96 -04/18/97 Page 1 of 2 .

DATE EVENT SER CHART POINT SUMP sunu nec. msr. s.Even.

REMARKS RESPONSE CHANGE 10/27/96 Monthly Surveillance NO NO NO l 0.0 gpm l 11/10/96 UNUSUAL YES YES YES l 1.7 gpm l Performed 2BOS RF-1/ Containment entry /P!F 455-201-96-0681 11/25/96 Monthly Surveillance YES *NO YES l 0.6 gpm l *Recorderwas not inking 11/27/96 RCFC Starts and Stops NO *NO YES l 0.2 gpm l

• Recorder was not iniung for Chi!!er work l l 12/02/96 RCFC Start for Chi!!er NO YES YES l 0.3 gpm l Chart recorder indicated max input of 0.6 gpm work l l 12/09/96 RCFC Start NO NO NO l 0.02 gpm l Short duration run, no level increase detected 12/27/96 Monthly Survaillance YES YES YES l 0.3 gpm l Chart recorder showmg approx. 0.65 gpm 01/22/97 Containment Release m YES- YES~ YESn ~ l: - l Chart Recorderincreased approx. 0.5 opm to 1.0 gom 01/24/97 Month!y Surveillance YES YES YES l 0.3 gpm l Chart Recorderincreased approx. O.3 gpm to 1.0 gpm l l l (Alarm came in from 1030-1512 & 1758-1836) 01/28/97 Containment Release ? YES YES YES9 311 m l Chart Recorder increased approx 0.45 opm to 0.75 gom

~01/3Of97 Containment Release : .YESt YES  ?" YESjg ~^

Chart Recorder increased hoprom 0.5 gpm to 0.8 gpm i-

, , QT ~ L j* ^j ** .A X PF 455-201-97-0046 generated due to continued reading of 1

,a. %x j ne - ~ "

' _~ 0.6 gpm on recorder .

01/31/97 Containment R*8a=== ' YES; YESw + YES<:15 - "I Chart Recorderincreased approx. 0.3 gpm to 0.9 gyc '

024Mt97 Containment Release YESU YES ~M YES?l:

'l Chart recorder increased =aarox. 0.45 mm to 0.75 com 02/04/97 Alarm @ 0709 YES YES YES Chart recorder increased appicx. 0.15 gpm to 0.9 gpm /

Perforrned 2BOS RF-1 02/05/97 Stop/ Start 2C RCFC YES YES YES l 0.1 gpm l Chart recorder increased approx. 0.15 gom to 0.9 gpm -

02/05/97 Alarm @ 1422 YES YES YES l '-e l Chart recorder increased approx. 0.15 gpm to 0.9 gpm 02/05/97 Restart of Cntmt Chiller YES YES YES l r+'-' l Chart recorder increased approx. O.15 gpm to 0.9 gpm 02/06/96 Alam @ 1439 YES YES YES Chart recorder increased approx. 0.15 gpm to 0.9 gpm .

Performed 2BOS RF-1 02/07/97 CwL,e..i Release F y YES< = YES'r T - Chart Recorder increased approm 0.4 gpm to 1.0 gpm -

02/08/97 Alarm @ 1300 , YES YES Chart Recorder increased approx. 0.15 gpm to 0.9 gom t I

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M' RF ALARM & CHART RECORDER ACTIONS FOR PERIOD OF 10/27/96 - 04/18/97 Pagelof 2 -

DATE EVENT SER CHART POWT SUMP AuRM REC. MST. 1.EVEL REMARKS RESPONSE CHANGE 02,09/97 YES YES '

Alarm @ 0507 YES ~ Chan Reccrder maintamed appicx. 0.7 gpm / 1 2BOS RF-1 Performed 1 02/09/97 Alarm @ 1351

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YES YES YES Chart recorder increased appicx. 0.1 gem to 0.7 gpm 02/10/97 CvinJod Reisase YESJ YES~ YES :lr =- - l Chart recorder mcreased marwox. O 45 pn to 0.9 gom L i

02/12/97 Containment Reloose YESS YES: ^ YES F l + a =il Chart recorderincrsesed maaror 0.4 @n to 0.9 gom 02/13/97 Alarm @ 1113 YES YES YES Chart Recvider slight increase / reading 0.65 gpm (0.65 - 0.75 i gpni has been baserine since 01/30/97) Perferined 2BOS RF-1 02/14/97 Contamment Release. YES 1 YESa ( YES~ ' ~ ^ i Chart recorder mcreased approx 0.45 gom to 0.9 ppm 02/16/97 YES YES YES Chart Recorder shows a x. 0.9 .

/ Performed 2BOS RF-1 02/17/97 Alarm @ 0334 YES YES YES Chart Recorder shows appror 1.0 gpm / Performed 2 SOS RF-1 02/17/97 Containment Release " YES- YES: YES: " Chart Recorder increased approx. 0.4 w i 101.2 gr u 02/17/97 Alarm @ 1802 YES YES YES Chart Recorder reading is approx.1.05 gpm 02/18/97 Start 2A RCFC Fan / YES YES YES l 024 gpm [ Performed in attempt to clear weir of debns /

Stop 2B RCFC Fan l i

l Flow increased from aoprox. 0.9 gom to 1.2 gom 02/20/97 Containment Release YES YES c YES : : l: - > l Chart Recorder meressed approm 0.3 gpm to 1.1 com 02/21/97. Containment Release YES5 YES- YES : 11 F;1 Chart Recorder increased approx. 025 gpm to 1.0 ppm 02/21/97 Monthly Surveillance YES YES YES l 0.13 gpm l Chart Recorder increased approx. 0.2 gpm to 0 9 gpm / (Atarm l l came in from 1538-1622 & 1916-2210) / Performed 2 SOS RF-1 02/24/97 Alarm @ > 01 YES YES YES Chart Recorder increased appicx. 0.4 gpci to1.0 gpci /

Performed 2BOS RF-1 02/25/97 Cci&Vi=4 Release YES' YES1 YESCl+ ' l Chart Recorder irx:ressed approx. 0.4 apm to1.2 gpm 02/25/97 Alas @ 0317 YES YES YES Chart Reccider increased approx. 02 gpm to1.0 gpm /

PerfenTE-d 2BOS RF-1 i

03/08/97 Sic' 2A'RCFC Fan / NO YES YES l 02 gpni l Chart Recorder increased approx. 0.2 gpm Start 2B ROFC Fan l l 03/21/97 Monthly Surveillance YES YES YES l 12 gpm l Chart Recorder increased approx. 2.0 gpm / i l ] (Alarm came in from 1300-1334) l 04/18/97 MiEly Surveillance NO YES E l 0.S gpm l Chart Recorder increased to approx. 0.75 com 1

}

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e Degraded RF System - cont.

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For each event received response from either the Significant Events Recorder, chart recorder, or alarm '

For single RCFC starts / stops, we expect to see no l

change Shift noted chart recorder not functioning l

Actions taken to verify aroper weir operation l

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Degraded RF System - cont. -

Root Cause

- Debris in floor drain system

- Flow control device restricted 4

- Drain bar grates missing or deteriorated

- Drain bar grates not installed according to design requirements

- Containment floor drain trough not according to design i

drawings d

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Degraded RF System - cont. ~

Safety Significance

- Health and safety of public not impacted

- Safe shutdown systems not affected

- Safe reactor conditions maintained i 12

Degraded RF System - cont.

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Corrective Actions

- RF System Activities (3/15 - 21/97 & 5/31 - 6/3/97)

Inspected and cleaned floor trench drains inside/outside missile barrier Visually inspected and cleaned weir box, oil separator, sump Flushed flow control device and associated piping Calibrated instrumentation 13

Degraded RF System - cont.

Corrective Actions - cont. -

- RF System Activities (11/07/97 & 4/5/98)

Hydrolaze floor drain system Install new bar grates Flush flow control device and associated piping Remove oil from oil vault .

Inspect and clean oil separator, weir box  ;

Dewater sump to support replacing sump pumps Verify system response following cleaning activities I

I 14 i

Degraded RF System - cont.

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Corrective Actions - cont. -

- Other RF System Activities ,

Submitted Training Revision Request 97-952 to review operator training package on RF system.

Submitted Preventive Maintenance program change, Loe  !

Number 97-117, to add PM activity.to boroscope the Flow Control Device at outage completion and as a final step in hydrolazing activities of RF drains.

Submitted Drawing Change Request (DCR 970069) to change drawings accordingly to identify the flow control box Revised Containment loose debris surveillance and RCFC monthly surveillance procedures 15

Prior Opportunity To Identify

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L Operztor response to indications  :

RF008

- Recorder .

- Alarm 16

Normal and Historical RF008 Response

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Recorder changes

- performing containment release

- performing RCFC surveillance ~

- restricted weir

- steam generator secondary side leakage Alarms responded as expected during this perioc.

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t Operator Response To Alarm -

Byron Annunciator Response Procedure

- Determine leak location

- Verify redundant indications sump pump run times radiation monitors Volume Control Tank (VCT) level Containment pressure

- Perform R.eactor Coolant System Water Inventory Balance 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> surveillance (BOS 4.6.2.1.d-1).

- Perform Containment Floor Drain Monitoring System ,

Non Routine Surveillance (BOS RF-1) .

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Operator Response To Alarm - cont,

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BOS RF-1

- Used if alarm in.without corresponding RCS leakage

- Look at RF sump level changes over time, RCS leak '

. rate

- Calculates new limits for baseline data

- Monitors RF008 every 30 minutes 19

~

e 2RF008 Reasonable Opportunity to Identify

- 2RF008 recorder Located behind the Main Control Board

- Qualification not quantification Good trend indicator Nuclear Station Operator must be relieved to check 1 gpm leak easily detectable on the VCT level recorder Leak detection alarm indicates >l gpm increase Recorder checked at least once per shift 20

, _ ___ ____ _ l

T Operators Opportunity To Identify System Problems

Recorder and alarm alerted operators to changing

.ea(age Operators verified indications with redundant  !

indications or procedures Operators wrote PIFs when input changes were

verified Operators verified containment status monthly during performance of the RCFC surveillance When alarms were received, operators responc ed per procedures Operators took actions to verify RCS leakage eaca time an alarm was ac clowledged

. . _ _ - _ _ _L

l l LER Quality I

Findings .

- Containment floor drain system not declared inoperable

- Information not considered complete and accurate  ;

- Safety Analysis was considered weak G

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LER Quality - cont.

l l

' Corrective Actions

- Implementing collegial Plant Operating Review Committee (PORC)

LERs will be reviewed by PORC

- Training sessions with major OSR reviewers and Root Cause. Experts

- Submit supplemental LER 23

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