River Bend Station Unit 1 - Supplement to RBS-ISI-016 and RBS-ISI … · 2012-08-29 · attachment 1 to rbg-47272 page 1 of 15 supplement to requests for relief entergy operations,

--- Enter. River Bend Station5485 U.S. Highway 61N

St. Francisville, LA 70775Tel 225-381-4177

Joseph A. ClarkManager, Licensing

RBG-47272

August 2, 2012

U.S. Nuclear Regulatory CommissionAttn: Document Control DeskWashington, DC 20555

SUBJECT:

REFERENCES:

Supplement to RBS-ISI-016 and RBS-ISI-017Requests for Relief from ASME Code Section XI Inservice InspectionRequirements for Pressure Retaining Welds in Control Rod Housings andPressure Retaining Welds in Pumps and ValvesDocket No. 50-458License No. NPF-47

1. Entergy Letter to NRC dated August 03, 2011, Requests for Relief RBS-ISI-016 and RBS-ISI-017, Requests for Relief from ASME Code SectionXI Inservice Inspection Requirements for Pressure Retaining Welds inControl Rod Housings and Pressure Retaining Welds in Pumps andValves (RBG-47166)

2. NRC Email dated February 1, 2012, River Bend Station Request forAdditional Information Regarding RR RBS-ISI-016 and RBS-ISI-017(ML11221A164)

3. Entergy Letter to NRC dated April 16, 2012, Supplement to Request forRelief RBS-ISI-016 and RBS-ISI-017 (RBG-47233).

4. NRC Email dated July 12, 2012, River Bend Station Request forAdditional Information Regarding RR RBS-ISI-016 and RBS-ISI-017

Dear Sir or Madam:

In Reference 1, Entergy Operations, Inc. (Entergy) submitted requests for relief from ASMECode Section XI Inservice Inspection Requirements for Pressure Retaining Welds in ControlRod Housings (CRD) and Pressure Retaining Welds in Pumps and Valves (examinationCategory B-O, Item Number B14.10 Welds in CRD Housing and C-G, C6.10, Pump CasingWelds).

In Reference 2, the NRC Staff requested additional information concerning this request, whichwas supplied in Reference 3. On July 12, 2012 an additional request for information wasreceived. This letter is in response to the July 12, 2012 request. /

(34`7

RBG-47272Page 2 of 2

This letter contains new commitments. If you have any questions or require additionalinformation, please contact me at (225) 381-4177.

Sincerely,

IA~b

Attachments:

1. Supplement to Requests for Relief RBS-ISI-01 6 and RBS-ISI-01 7

2. List of Regulatory Commitments

RBF1-12-0110

cc: Regional AdministratorU. S. Nuclear Regulatory CommissionRegion IV1600 E. Lamar Blvd.Arlington, TX 76011-4511

NRC Senior Resident InspectorP. 0. Box 1050St. Francisville, LA 70775

U. S. Nuclear Regulatory CommissionAttn: Mr. Alan WangMS 0-8B1One White Flint North11555 Rockville PikeRockville, MD 20852

Louisiana Department of Environmental QualityOffice of Environmental ComplianceRadiological Emergency Planning and Response SectionJiYoung WileyP. O. Box 4312Baton Rouge, LA 70821-4312

Public Utility Commission of TexasAttn: PUC Filing Clerk1701 N. Congress Avenue.P. O. Box 13326Austin, TX 78711-3326

ATTACHMENT I TO

RBG-47272

SUPPLEMENT TO REQUESTS FOR RELIEF

RBS-ISI-016 and RBS-ISI-017

Attachment 1 toRBG-47272Page 1 of 15

SUPPLEMENT TO REQUESTS FOR RELIEF

ENTERGY OPERATIONS, INC.RIVER BEND STATION - UNIT 1

RESPONSE TO NRC REQUEST FOR ADDITIONAL INFORMATION REGARDING RELIEFREQUESTS RBS-ISI-016 AND RBS-ISI-017

Question 1:

In the RAI we asked if Entergy had performed any other examinations in the area of the CRDHousing welds. Entergy responded in saying that in the 2 nd 10-year IS[ interval it performed VT-1 visual examinations of CRD bolting and found some with some of the bolting that had pittingand corrosion. Entergy stated it removed the bolts and replaced them. The question is didEntergy determined what was the root cause of the pitting and corrosion of the bolting?

Response:

The subject indications were documented on inspection reports and addressed under theCorrective Action Process. The level of classification of the conditions did not warrant theperformance of root cause or apparent cause evaluations. The conditions were characterizedby use of a supplemental examination method (eddy current), then evaluated against pre-established acceptance criteria and found acceptable. The conditions were corrected byreplacement of the subject fasteners under the Work Management Process.

Pages 3 - 15 are a sample of an unsatisfactory examination, a supplemental examination, theassociated evaluation and a page from the Work Order that replaced the subject fasteners.

Question 2:

The other issue is in one of the RAI questions we asked Entergy if it had considered using aremote camera to examine the CRD welds since there have been improvements in quality of theequipment, Entergy answered no. Will Entergy consider using a remote camera for the nextinterval; in this case for RBS it would be the 3 rd 10-year interval.

Response:

Entergy will continue to investigate and evaluate for suitability alternative inspection methods,such as the remote camera suggested by the NRC, for the third and subsequent ISI intervals aslong as the impracticality remains. It should be noted that Entergy fully understands that use ofany examination method other than the volumetric or surface method specified in ASME Code,Section XI, Table IWB-2500-1 will require relief approved by the NRC.

Since the ISI scope for the upcoming refueling outage (RF-17) has been selected,implementation of alternative methods determined to be suitable would begin Spring 2015, whichcorresponds with refueling outage RF-18.


VISUAL INSPECTION VT-IINSPECTION REPORT

Q-A O~(

?age .L of~

rr,- p2V?

%TDE- le-0 1O 1 KAI .351466 e-e 29&I't &C~A 8-jcv.is[ ) Cd

Q OTHMR _ _ _

Lli -coi'A /th Aefte 9:T& a/ Mix Rcw

TOTALOBSERV. XM~IBUTE DESCRIPTON S/TYW

- Boltinn~5-0170

REMAiC:ý A,

LEVEL lit IVALUNIiJON (FOR LINSAT CONDMrONS ONLY) SAT'114. UNSAT

LIXSAT CLOsSUMVý TRACKING DCJC¶~'X.T.N

UVE *(CDATE


031R20506Page 2 of 2

A VT- I examination was perforrmted on 120 CRD boils. 50 bolts had lincar indicationsthat require supplement (ET) examination. The Ibl1owing art CRD locations inspected

tith the numlber of bolts wilh linear indications.

Location / Namber o. Linear Indleationj-

12-45/240-531420-21/736-13/320-13 / 552025 1 5[2-091 704-37/512-211216-53 / 020-05 / 144-371236-531124-13/036-37/7


Repwt No:I________ENTERGY ____axe__

CONTROL ROD DRIVE CAP SCREW EDIDY CURRENTr REPORTr MM. ISOIIJWG: QA RECORD: NON QA RECORD:

355 4TI i ^ ao. I OA[Other Trace Dcc: CRD ID-. RT RT GGIS J? US Dafte

I to U 4 I ,. ,ECT lnstnimens No: [Ustnment Noi i %t. Pps nia

Probe:- Ipfobe S% ,tndr M(

Probe Extensian Length: Recording Nvyke- Jrunwtinj N*J 9Mv. M.

Conflonvrati No.: samnple. Pate. Materiak q/h_ _EMS.__________________ 41

GaiVn Oute I I Callbratioa[asilai Cal b~d

CIO* A. 0

1 190 1_.___ Final Cal 03o

.70.4 1 -

2-2___ __ __ __2 osw ___ ___ __

Comn uA114

E~e~ge~ ~ . DIrsiticaed By Ij j QlnlReview.'~~Q 13i..

E~~~aM~: e.me goN. o P


CONTROL ROD DRIVE CAP SCREW EDDY CURRENT REPORTMM: ISOJDWG QA RECORDh::NON QA RECORD:

,95549S 1 ak/.I 11AOtber'nTract Do w IM: UTT GGNS: IF 5.85 1 Dse:

F~CT Insuwuest No: Inutrumeut No. No. Pitee 1wklall

prwProbe SNq: StaadardMoc

Probe, Euusfun [*ngtb: Recording D&Atca Intuto o t

Conflurstian Mo.; Samplo Rau;P~triL

______re Gain Phas V/H PMU sic Out CalibnatlueI -T -CkI InitialCal *C'%w

component ID ladication No, os et

-12- 9-t - I. A __ _ _ _ _ _ _ 1.7 joils"

I_ I-____________ Isy*12-cgn-I 2_14_____I______

I-X -0I _______

Comiment= 1* OtapUfttf~

~imne~'cvd~ae~ ~ud( iqpesiitoned B . Q e,4Anew._____IIM il-S L. 0,6.00~

Flmd -evoDim: L~f~~.

Fitam lnbe.- o. DOWOU0 ~ o J. iq 77asc


'ECT ?~ 3f1

I Report No:ENTERGY 1 03-x~ -96L6,30

CONTROL ROD DRIVE CAP SCREW EDDY CURRENT REPORTMAk ISOJDWQ QA RICORJ)- Off QA RECORM

365q8SOther Trace Do=t CRD ID-. RT RT GG-NS:- VISAS Daft:

C-1 see- e-colom

ECT Tn~et No0: Inmurmet No: No. Paw-IMtai

M -& ,43 10 b cs ýýPoProbe:e N Standard Nar

Irobe zilessiva Lenzib: Recerding D-4eif: [oashicitim NnJ REtr

Conlaguratfun r~m. Sample Raft: "IaleriahkA~~l

Chan. AI Gain Phane VH PID w~ OwLa1ubradan

IjMks I -Lvil-i Cal a 3co

Coinpmieu MD K&lais n Vohsi Depth

__ __ __ __ _ I'ý I -t 7_ _ _ __ _

3!j0 all_

ComnenA .1- ý 0032

l~imiet~eelDaje J. ~i~J.-DftpeuIt~ooed3yt~x 4?4j) QA FInaxJRaew~e

Evamine el(Dak-T~~f~w

Exam Time: RWPNO, 0600710Vt1 A0


ECrReotNo:

ENTERGY CCONTIROL ROD DRIVE CAP SCREW EDDY CURRENT REPORT_

MAI: LsOJDWC. QA RECORD. NON QA RECOMD

~.~'eDoc CRD 1D. l RT GGNS: F &85 Dow.

-1CT utnMMt Nr4( fnomrmeul No.- No. pagm ~ Initials

M1142 * 1ba I~ a ArProbez P~robe -,N-: Stsandrd Noc

Probe EXteG8dI.Aloni~gthk Rewtiso±n Device- totriuetion Noi ev101 PCAPwNS . 0q

Coafiluraslon.No.: Samnple RaWe Materiah "VAk

Chain. FM "am Mae. WE PI'D &C Out Calibration

IZ Z fl [a2IM o 69Iidai CA qC2o

14 lbhju el qo 1Finual Cd PdfComponent ID Indicatlio No. I VONta Depth

.3;L- 17 %66* . 1.1 M.3 . 0 a2,L- 17 - & tZ I 1.141 .__ ___5 __ __

S ~7 - I&OA. I _ ___ ___ 0

36 3 ILL4LL7 .1 346 - B53 t o.3_ _ _ _ __ _ _

Co'raeute- &N- M 4~~*106%j 0teoa 9

Exaxnfer7 edeev f Ii A v0e M

-%xam in=e RkWvNo. Dm aI______ 1 ~ IV7 ASAL

Attachment 1 toRBG-47272Page 8 of15

ECT Report No:

CONROLRODENTERGY oZ~~CONROLRODDRIVE CAP SCREW EDDY CURRENT REPORT

MAI: ISOIDWG: QA RECORD NON QA RECORD

355s"f5 K )Z,! IP).kerTaeDcc CIRD rg: UT RT GGNS: F 5.05 09C.

se cL*am$4 oPie

Probr. Probe SN: Sadr Nw5- IS - 033 ItM4-S S

Probe Extension lAnob: Recoding De~.ce: !ontnactin ou RM

conftguratdou N*.: Swmpl Rate: Material: A"

Cban. Fr Gain Phan VIlE P/I out OiCalibraiaiu

_______it fl Cal O*~.

C_ _ _ __ _ _ Bep4b

130 L+ -4 2*25 1!6L Z~*~. I t.2s

4-7 S &La64A .:?1 .0114-12 .7'

mtor/L~d(ate)Dspouitioned Bltaq4a)u QA Ftna) Review-To* nu&"LIIA -41ol

EzaM Tiaae: RWPNIL DOMePg07?0 qoo -s a I


o13

L."

(W7

b ,

Attachment 1 toRBG-47272Page l0of 15

•1.Ente-y ] CONDITION REPORT 7CR-RBS-2003-01606

origintor: WilliamsBobby R

Originator Group: QA InspecnonsiNDE Staff

Supeu-isor Name: exhampDamid W

Discovered Date. 04,02r.003 16:41

Origixator Phone: 4690

Imtiated Date: 04"202003 16:43

Condition Description:3 13-RDWFDbOOMA 1355485

CRDM bolts listed below were found to have rejectable indicatioas during the VT-1 examinaton per Section .a of the.4ME code. Acceptance criteria is as follows:

A.Ncn-a•i flaws less =n or equa to ?" in length-3.. Atia flaws less than or equal to " in length.

CRDM Numbers

3 6-53-.318 long limea indication in ta circtumferential direction in the head to s1tan area QTY 1 bolt

12-21-. ? inch inear in the Axial direction. Bolt labeled 12-21-1

36-13-. inzr indication entire ckrcumireace of bolt (loca3on Head to Shank). Bolt labeled 36-13-1

36-37- Liner indiation 5/16" long in the mon-axial direcion on the bolt -:hank Bolts labeled 36-37-1 sand 36-37-5

50-25-. inea indication 318" Long in the non-axial direction on dte bolt -hjk. Bolt Labeled 50-25-3

04-37-.1Liar indi tion 5/16" long in die non-axial direction on the bolt shank Bolt labeled 4-37-5

Immediate Action DescripdioawNotified Eugneeemg

Suggested Action Des•tion:Eagineering to evaluate

EQUIPMENT:

Tau Name

REFERENCE ITEMIS:

Tve CodeLCO

NMT . NONCON0ORMANCE

OUTAGEQ CLASS

Tax Suffix Naenu Cmponaent CodeProcess Syteom Code

050

DescriptonTLCO-03-1457

YI.S

Q1


En teW ADMIN CR-RBIS20034)1606

Imtiated Date: 40Y2003 16:43 Owner Group :Rng Out3g. NMfg

Current Contact:

Current SiVifiance: C

Clowd by• Hu-.Kerry P 417M003 19:33

Summary Description:

Remarks Description:

Closure Description:

The dual CA&A review for cosure has been caopteted with satidsfactory resuhL


Entergy A S S I G N IM E N T S CR-RBS-2003-01606

Version 1

Sigificanae Cod*: C

Classification Code: NON

own"r Group: Eng OilagMgan

Performed By:. BamRobex G 04j'04(2003 11:26

Assign•nmt Description: 1ý

Tbe CRG has directed tb= dm CR be desigtated as a categy "C - CORR ACTION" to com'ct the ideniied comii.iiono.ly An appa-max cause znalyus is not required.


Aj .E,,t ,Zy I REPORTABILITY CR-RBS-2003-01606

Rapra~bilityVerinwa 1

Report Number:

Report Code: NOT REPORTABLE

BaiIkrpb~teCode: NON RPT -=EQlIP

PerfaruzedBy: Wflliamso2LDrmy H '24V0312003 0"7:17

Reportabiliy Deuription:This ccenditboa imelves equximae= ismnu dwa m~e not repomtble. This c-,qi on wss fotind &dm~ig scbadWiWed matnne.=nd the bolts weze replacedL


@Enteiy CORRECTIVE ACTION CR-RBS-2003-01606

CAINumber. 1

Gro2p I Name IAssigned By: RBS Refuel Forced Outage FredieuAnthony 0

Ass•ged To: Eng Outage Mr GamesTimothy W

Subassigued To: Eng Outage Staff DunlkebergJohu R

Originated By: Fredie'u,AnrnhoyO VI3 17:4.0:29

Performed By: Fo0PehlC1riS E 4.3,03 05:20:18

Subperformed By:

Approved By:

Closed By:. McGeejatmas M 463i03 0603:14

Current Due Date: 0031003 TaidJ DueDate: 04C"0-4-003

CA Type: NON-SIG DISPOSUON

Plant Constraint: RP-11 VESSEL HYDRO

CA Description:Determinze if an incream u sampling is required based on CRDM bolts were fkad to bave repertable indicaoans dming theVT-o exnminstion per Sectona M of the ASME code

Respons.:Several CRD cap sc•me, e•x•hbed ]=ear indicatons during a 'vT-I visal imjecncu per N,*ý4M IDEI0.0l. Thisexam.aiaon was being perfomed to meet M3 Program reqwrements. As discussed in Engineering Report EP-98-,03-01dated September 1998, shallow surface flaws are common in C.D cap screws and %1M not affect their design fncrton:rowe, rthe report reconma.nds ta Eddy Current Testing should be conducted to veuify flaw $eyb Section 6.0 of the

report staes that scope expanson is NOT required if flaw depth is <0107". Eddy Current Testing was conducted on dhecap screws exhibiting linear indicaans mad due deepest faw iele ed was 0.0735" in depth

3ased on the above, no scope expansion is necessary.

R.efree: GE SL No. 483 Rev. 2-:n!Lperig Report ER-99-003-01In.pectno Report No. 03.U.0530NAX 355485

Subresponse:

Closure Comments:

Attachment 1RBG-47272Page 15 of 15

I Entergy Operations, Inc.

Maintenance Action ItemMECHANICAL

MAI 355485B13-RDMFDO08 I

3.9 WHEN obtaining any material from the warehouse, THEN remove the FME covers andany additional shipping or packaging materials prior to installation.

3.10 Sections of this MAI may be performed out of sequence with supervisor approvalprovided the intent remains unchanged and adequate plant and personnel protection ispresent.

3.11 Use the identified low dose ALARA waiting areas.

3.12 Heat stress is a concern for this work under the vessel and should be monitored inaccordance with ADM-0068, Heat Stress Program.

4 SUGGESTED PARTS

STOCK NUMBER

RBN 1 M447008045

RBN1P447007317

RBN 1P447007335

RBN 1 P447007531

RBN2P447008226

RSN2P447009488

.RBN2P447009503

RBN4P91 5008173

RBN4P915015753

PART NUMBER

768E534G001

CR28

CR2C & CR3-16

CR3-15

158B763P007

159A2816P001

159A2816P002

N/A

D50YP

DESCRIPTION

CONTROL ROD DRIVE MECHANISM

DRYWELL SIDE CRD HATCH O-RING

DRYWELL & CONTAINMENT CRD HATCHES O-RING

CONTAINMENT SIDE CRD HATCH O-RING

CRD MOUNTING FLANGE O-RING

METALLIC O-RING

METALLIC O-RING

CASTOR OIL'

ANTI-SEEZ THREAD LUBRICANT

CIY151

21

3015 3,1511

5 WORK INSTRUCTIONS

5.1 Check the following preliminary requirements are established:

NOTE

New fasteners are required per the GE OE recommendation.

5.1.1. Notify QC to perform a VT-1 inspection of the new fasteners being installed.

A% O -jZDI& Vr-1 i apcBo' [H] ýiw 54-

t(gC VER.3

5.1.2. Record the ASME information of the replacement flange fasteners with QC verification.

ASME REPAIR/REPLACEMENT PLAN No__________________

PART DESCRIPTION SERIAL NO. P.O. NO. R.I.R. NO. TRACEABLE ID NO. CITY

~2- /0AA A/l

te Pri-ted; 9, /0 11/0 21 :02 t Page1• 27o5f

Da te Printed: 9/'11 /02 9:09:24 A M Page 2 of 13 •[

Attachment 2

RBG-47272

List of Regulatory Commitments


List of Regulatory Commitments

The following table identifies those actions committed to by Entergy in this document. Any otherstatements in this submittal are provided for information purposes and are not considered to beregulatory commitments.

TYPE(Check one) SCHEDULED

ONE- CONTINUING COMPLETIONCOMMITMENT TIME COMPLIANCE DATE

ACTIONEnterqy will continue to investiqate and Xevaluate for suitability alternative inspectionmethods, such as the remote camerasuggested by the NRC, for the third andsubsequent ISI intervals as long as theimpracticality remains.

Documents

River Bend Station Unit 1 - Supplement to RBS-ISI-016 and RBS-ISI … · 2012-08-29 · attachment 1 to rbg-47272 page 1 of 15 supplement to requests for relief entergy operations,