RBG-47272, Supplement to RBS-ISI-016 and RBS-ISI-017, Requests for Relief from ASME Code Section XI Inservice Inspection Requirements for Pressure Retaining Welds in Control Rod Housings and Pressure Retaining Welds in Pumps and Valves
| ML12234A399 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 08/02/2012 |
| From: | Clark J Entergy Operations |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| RBG-47272 | |
| Download: ML12234A399 (20) | |
Text
--- Enter. River Bend Station 5485 U.S. Highway 61N St. Francisville, LA 70775 Tel 225-381-4177 Joseph A. Clark Manager, Licensing RBG-47272 August 2, 2012 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555
SUBJECT:
Supplement to RBS-ISI-016 and RBS-ISI-017 Requests for Relief from ASME Code Section XI Inservice Inspection Requirements for Pressure Retaining Welds in Control Rod Housings and Pressure Retaining Welds in Pumps and Valves Docket No. 50-458 License No. NPF-47
REFERENCES:
- 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 Section XI Inservice Inspection Requirements for Pressure Retaining Welds in Control Rod Housings and Pressure Retaining Welds in Pumps and Valves (RBG-47166)
- 2. NRC Email dated February 1, 2012, River Bend Station Request for Additional Information Regarding RR RBS-ISI-016 and RBS-ISI-017 (ML11221A164)
- 3. Entergy Letter to NRC dated April 16, 2012, Supplement to Request for Relief RBS-ISI-016 and RBS-ISI-017 (RBG-47233).
- 4. NRC Email dated July 12, 2012, River Bend Station Request for Additional 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 ASME Code Section XI Inservice Inspection Requirements for Pressure Retaining Welds in Control Rod Housings (CRD) and Pressure Retaining Welds in Pumps and Valves (examination Category B-O, Item Number B14.10 Welds in CRD Housing and C-G, C6.10, Pump Casing Welds).
In Reference 2, the NRC Staff requested additional information concerning this request, which was supplied in Reference 3. On July 12, 2012 an additional request for information was received. This letter is in response to the July 12, 2012 request.
/
(34`7
RBG-47272 Page 2 of 2 This letter contains new commitments. If you have any questions or require additional information, 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 Administrator U. S. Nuclear Regulatory Commission Region IV 1600 E. Lamar Blvd.
Arlington, TX 76011-4511 NRC Senior Resident Inspector P. 0. Box 1050 St. Francisville, LA 70775 U. S. Nuclear Regulatory Commission Attn: Mr. Alan Wang MS 0-8B1 One White Flint North 11555 Rockville Pike Rockville, MD 20852 Louisiana Department of Environmental Quality Office of Environmental Compliance Radiological Emergency Planning and Response Section JiYoung Wiley P. O. Box 4312 Baton Rouge, LA 70821-4312 Public Utility Commission of Texas Attn: PUC Filing Clerk 1701 N. Congress Avenue.
P. O. Box 13326 Austin, TX 78711-3326
ATTACHMENT I TO RBG-47272 SUPPLEMENT TO REQUESTS FOR RELIEF RBS-ISI-016 and RBS-ISI-017
Attachment 1 to RBG-47272 Page 1 of 15 SUPPLEMENT TO REQUESTS FOR RELIEF ENTERGY OPERATIONS, INC.
RIVER BEND STATION - UNIT 1 RESPONSE TO NRC REQUEST FOR ADDITIONAL INFORMATION REGARDING RELIEF REQUESTS 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 CRD Housing 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 pitting and corrosion. Entergy stated it removed the bolts and replaced them. The question is did Entergy 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 the Corrective Action Process. The level of classification of the conditions did not warrant the performance of root cause or apparent cause evaluations. The conditions were characterized by use of a supplemental examination method (eddy current), then evaluated against pre-established acceptance criteria and found acceptable. The conditions were corrected by replacement of the subject fasteners under the Work Management Process.
Pages 3 - 15 are a sample of an unsatisfactory examination, a supplemental examination, the associated 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 a remote camera to examine the CRD welds since there have been improvements in quality of the equipment, Entergy answered no. Will Entergy consider using a remote camera for the next interval; 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 as long as the impracticality remains. It should be noted that Entergy fully understands that use of any 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, which corresponds with refueling outage RF-18.
to RBG-47272 Page 2 of 15 VISUAL INSPECTION VT-I INSPECTION REPORT Q-A O~(
?age .Lof~
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 TOTAL OBSERV. XM~IBUTE DESCRIPTON S/TYW
- Boltinn
~5-0 170 REMAiC:ý A, LEVEL lit IVALUNIiJON (FOR LINSAT CONDMrONS ONLY) SAT
'114. UNSAT LIXSAT CLOsSUMVý TRACKING DCJC¶~'X.T.N UVE *(CDATE to RBG-47272 Page 3 of 15 031R20506 Page 2 of 2 A VT- I examination was perforrmted on 120 CRD boils. 50 bolts had lincar indications that require supplement (ET) examination. The Ibl1owing art CRD locations inspected tith the numlber of bolts wilh linear indications.
Location / Namber o. Linear Indleationj-12-45/2 40-5314 20-21/7 36-13/3 20-13 / 5 52025 1 5
[2-091 7 04-37/5 12-2112 16-53 / 0 20-05 / 1 44-3712 36-5311 24-13/0 36-37/7 to RBG-47272 Page 4 of 15 Repwt No:
I________ENTERGY ____axe__
r MM.
CONTROL ROD DRIVE CAP SCREW EDIDY CURRENTr REPORT ISOIIJWG: QA RECORD: NON QA RECORD:
[Other 355 4TI Trace Dcc: CRD ID-.
Ito U4 i ^
RT I ,.
ao. I RT GGIS J? US OA Dafte 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 I I Oute Callbratioa
[asilai Cal b~d CIO* A.0 11_.___
190 Final Cal 03o
.70.4 1 -
2-2
__ __ __2 ___ osw ___ __
Comn uA114 E~e~ge~ '~~Q ~ . DIrsiticaed 13i.. By j Ij QlnlReview.
E~~~aM~: o P e.megoN.
to RBG-47272 Page 5 of 15 CONTROL ROD DRIVE CAP SCREW EDDY CURRENT REPORT MM: ISOJDWG QA RECORDh::NON QA RECORD:
,95549S 1 ak/.I 11A Otber'nTract Do w IM: UTT GGNS: IF5.85 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 Calibnatlue I -T -CkI InitialCal *C'%w component ID ladication No, os et 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 o.lnbe.- DOW OU0 ~J. iqo 77asc to RBG-47272 Page 6 of 15
'ECT ?~ 3f1 I
Report No:
ENTERGY 103-x~ -96L6,30 CONTROL ROD DRIVE CAP SCREW EDDY CURRENT REPORT MAk ISOJDWQ QA RICORJ)- Off QA RECORM 365q8S Other 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 ýý PoProbe: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 -t __7_ __ _ I'ý _ _ __ _
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, 060 0710Vt1 A0 to RBG-47272 Page 7 of 15 ECr ReotNo:
ENTERGY C CONTIROL 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 Ar Probez P~robe -,N-: Stsandrd Noc Probe EXteG8dI.Aloni~gthk Rewtiso+/-n Device- totriuetion Noi ev 101 PCAPwNS . 0q Coafiluraslon.No.: Samnple RaWe Materiah "VAk Chain. FM "am Mae. WE PI'D &C Out Calibration IZ o Z fl 69Iidai [a2IMCA qC2o 14 el lbhjuqo 1Finual Cd Pdf Component ID Indicatlio No. I VONta Depth
.3;L-17 %66* . 1.1 M.3 . a0 2,L- 17 - & tZI 1.141 .__
___5 __ __
S ~7 - I&OA. I _ ___ ___ 0 36 ILL4LL7 3 .
1 346 - B53t _ _ _ o.3___ _ _
Co'raeute- &N- M 4~~*106%j 0teoa9 Exaxnfer7 edeev f IiA v0e M
-%xam in=e RkWvNo. Dm aI
______ ~
1 IV7 ASAL to RBG-47272 Page 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 oPiecL*am$4 Probr. Probe SN: Sadr Nw 5- 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 OiCalibraiaiu out
_______it fl Cal O*~.
C_ _ _ __ _ _ Bep4b 130 L+ -4 2*
251!6L Z~*~. I t.2s 4-7S &La64A .:?1 .011 4-12 .7' mtor/L~d(ate)Dspouitioned Bltaq4a)u QA Ftna) Review-To*nu&"LIIA -41ol EzaM Tiaae: RWPNIL DOMePg 07?0 qoo -s a I to RBG-47272 Page 9 of 15 o13 L."
(W7 b ,
to RBG-47272 Page l0of 15
- 1.Ente-y ] CONDITION REPORT 7CR-RBS-2003-01606 origintor: WilliamsBobby R Origixator Phone: 4690 Originator Group: QA InspecnonsiNDE Staff Supeu-isor Name: exhampDamid W Discovered Date. 04,02r.003 16:41 Imtiated Date: 04"202003 16:43 Condition
Description:
3 13-RDWFDbOO MA 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 36-53-.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 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 Descripdioaw Notified Eugneeemg Suggested Action Des*tion:
Eagineering to evaluate EQUIPMENT:
Tau Name Tax Suffix Naenu Cmponaent CodeProcess Syteom Code 050 REFERENCE ITEMIS:
Tve Code Descripton LCO TLCO-03-1457 NMT . NONCON0ORMANCE YI.S OUTAGE Q CLASS Q1 to RBG-47272 Page 11 of 15 EnteW 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 to RBG-47272 Page 12 of 15 Entergy A S S I G N IME 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.iion o.ly An appa-max cause znalyus is not required.
to RBG-47272 Page 13 of 15 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 to RBG-47272 Page 14 of 15
@Enteiy CORRECTIVE ACTION CR-RBS-2003-01606 CAINumber. 1 Gro2p I Name I Assigned 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 the VT-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. This exam.aiaon was being perfomed to meet M3 Program reqwrements. As discussed in Engineering Report EP-98-,03-01 dated September 1998, shallow surface flaws are common in C.D cap screws and %1Mnot affect their design fncrton
- rowe, rthe report reconma.nds ta Eddy Current Testing should be conducted to veuify flaw Section 6.0 of the
$eyb report staes that scope expanson is NOT required if flaw depth is <0107". Eddy Current Testing was conducted on dhe cap screws exhibiting linear indicaans mad due deepest faw iele ed was 0.0735" in depth 3ased on the above, no scope expansion is necessary.
-:n!Lperig Report ER-99-003-01 In.pectno Report No. 03.U.0530 NAX 355485 Subresponse:
Closure Comments:
RBG-47272 Page 15 of 15 I
I Entergy Operations, Inc.
Maintenance Action Item MAI 355485 MECHANICAL B13-RDMFDO08 3.9 WHEN obtaining any material from the warehouse, THEN remove the FME covers and any additional shipping or packaging materials prior to installation.
3.10 Sections of this MAI may be performed out of sequence with supervisor approval provided the intent remains unchanged and adequate plant and personnel protection is present.
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 in accordance with ADM-0068, Heat Stress Program.
4 SUGGESTED PARTS STOCK NUMBER PART NUMBER DESCRIPTION CIY RBN 1M447008045 768E534G001 CONTROL ROD DRIVE MECHANISM 15 RBN1P447007317 CR28 DRYWELL SIDE CRD HATCH O-RING 1 RBN 1P447007335 CR2C & CR3-16 DRYWELL & CONTAINMENT CRD HATCHES O-RING 2 RBN 1P447007531 CR3-15 CONTAINMENT SIDE CRD HATCH O-RING 1 RBN2P447008226 158B763P007 CRD MOUNTING FLANGE O-RING 30 RSN2P447009488 159A2816P001 METALLIC O-RING 15 3,
.RBN2P447009503 159A2816P002 METALLIC O-RING 15 RBN4P91 5008173 N/A CASTOR OIL' 1 RBN4P915015753 D50YP ANTI-SEEZ THREAD LUBRICANT 1 5 WORK INSTRUCTIONS 5.1 Check the following preliminary requirements are established:
NOTE New fasteners are requiredper 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-VER.3 t(gC 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, 21
/0 :0211/0 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 to RBG-47272 Page 1 of 1 List of Regulatory Commitments The following table identifies those actions committed to by Entergy in this document. Any other statements in this submittal are provided for information purposes and are not considered to be regulatory commitments.
TYPE (Check one) SCHEDULED ONE- CONTINUING COMPLETION COMMITMENT TIME COMPLIANCE DATE ACTION Enterqy will continue to investiqate and X evaluate for suitability alternative inspection methods, such as the remote camera suggested by the NRC, for the third and subsequent ISI intervals as long as the impracticality remains.