ML20046C907

Forwards Viewgraph Presentation Matl That Util Staff Presented to Region I on 930630 Re Erosion/Corrosion & SG Tube Programs & Insp Planned for Refuel Outage Planned to Start in Aug 1993.List of Attendees Encl

ML20046C907
Person / Time
Site:	Maine Yankee
Issue date:	08/03/1993
From:	Durr J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:	Frizzle C Maine Yankee
References
NUDOCS 9308130011
Download: ML20046C907 (50)

Text

{{#Wiki_filter:bD e AUG 0 31993 - Docket No. 50-309 Mr. Charles D. Frizzle President Maine Yankee Atomic Power Company 83 Edison Drive Augusta, Maine 04336

SUBJECT:

MAINE YANKEE EROSION / CORROSION PROGRAM AND OUTAGE PLANS, PRESENTATION TO REGION I ON JUNE 30,1993 This is to document that on June 30,1993, members of the Maine Yankee staff presented information to the NRC Region I staff on their erosion / corrosion and steam generator tube programs and inspections planned for the refuel outage planned to start in August 1993. Other significant outage activities were also discussed. These included mechanical projects, and electrical and I&C projects. Attached are copies of the view graph presentation material used by the Maine Yankee staff. A list of attendees is included as Attachment 1. I Your cooperation in providing the outage overview is appreciated. Sincerely, Jacque P. Durr, Chief Engineering Branch Division of Reactor Safety f OFFICIAL RECORD COPY G:MY93OUT.AH f l 930st30011 930803 PDR ADOCK 05000307 l P PDR R v

AUG 0 31993 Mr. Charles D. Frizzle 2 cc w/ encl: G. Ixitch, Vice President, Operations P. L. Anderson, Project Manager (Yankee Atomic Eiectric Company) R. W. Blackmore, Plant Manager J. A. Ritsher, Attorney (Ropes and Gray) P. Dostie, State Nuclear Safety Inspector Peter Brann, Assistant Attorney General U. Vanags, Maine State Planning Office C. Brinkman, Combustion Engineering, Inc. First Selectmen of Wiscasset Maine State Planning Officer Public Docrment Room (PDR) Local Pub'ac Document Room (LPDR) Nuclear f,afety Information Center (NSIC) K. Abr*. ham, PAO (22) SALP Reports and (2) All Inspection Reports NRC 'lesident Inspector State of Maine, SLO Designee l'ec w/ encl: Region I Docket Room (with concurrences) bec w/enci (VIA E-MAIL): V. McCree, OEDO E. Trottier, LPM, NRR W. Butler, NRR r 1 RI:DRS RI:DRS d(:D S Durr H, es 07/2*/93 07//J93 p / 93 OFFICIAL RECORD COPY G:MY93OUT.AH J

O ATI'ACHMENT I NAME ORGANIZATION TITLE W. Lazarus NRC Chief, Reactor Projects Section 3B J. Durr NRC Chief, Engineering Branch, DRS H. Gilpatrick Maine Yankee Mechanical Engineering Section Head T. Gifford Maine Yankee Assistant Manager, Corporate Engineering R. Nelson Maine Yankee Manager, Corporate Engineering G. Whittier Maine Yankee V.P. Licensing and Engineering C. Shaw Maine Yankee Manager, Plant Engineering R. Maurer ABB-CE Manager, NDE Technology L. Speed Maine Yankee Senior Reliability Engineer P. Mehlhorn Maine Yankee Senior Performance Engineer R. McBrearty NRC Reactor Engineer E. Gray NRC Chief, Materials Section M. Modes NRC Chief, NDE Mobile Lab J. Linville NRC Chief, Projects Branch 3 R. Harris NRC NDE Technician i t

t AGENDA NRC/ MAINE YANKEE MEETING JUNE 30,1993 INTRODUCTION D. WHITTIER EROSION / CORROSION PROGRAM P.MEHLHORN STEAM GENERATOR INSPECTION PROGRAM L. SPEED OUTAGE MECHANICAL PROJECTS H. GILPATRICK OUTAGE ELECTRICAL AND I&C PROJECTS T. GIFFORD CONCLUSION D. WHiTflER - l L : \\ gd=\\06309 3. e g d

MAINE YANKEE EROSION / CORROSION (E/C) PROGRAM UPDATE PROGRAM GOAL 1 ZERO FAILURES DUE TO E/C THAT COULD CAUSE PERSONAL INJURY, A PLANT TRIP, A SAFETY SYSTEM ACTUATION, OR A PLANT SHUTDOWN. BACKGROUND JULY 22,1992. 2" D MSR VENT LINE ELBOW FAILURE i [ SEPTEMBER,1981 16" SECOND POINT EXTRACTION LINE FAILURE t R:\\ PED \\PJM\\93 29 .-.-...- ~.-: . -. =

LONG-TERM CORRECTIVE ACTIONS (PRESENTED JULY 30,1992) e UPGRADE PROGRAM DESCRIPTION e IMPLEMENT INDEPENDENT REVIEW OF SAMPLE PLAN e DEVELOP FORMAL METHODS TO CAPTURE INDUSTRY EXPERIENCE e INCORPORATE CHECMATE INTO PROGRAM e INCORPORATE PERMANENT GRIDS INTO PROGRAM CONTINUE PLANS TO INCREASE pH e e. CONTINUE PLANS TO CONVERT TO MORPHOLINE e CONTINUE RESISTANT MATERIALS AS REPle. CEMENTS R:\\ PED \\PJM\\93-29 i m m a m-4- v r-i-

i INDEPENDENT PROGRAM REVIEW - DEFICIENCIES-i e DOCUMENTATION WEAKNESSES BASES SELECTION GUIDELINES EXPANSION GUIDELINES INDUSTRY EXPERIENCES . R:\\ PED \\PJM\\93-29 4 .,,., -, + _. .,*,-n - i - - - --_ _,-__ -,-e-,--., - m-m. m. m. m..

E/C PROGRAM REWRITE e SCREENING e ANALYSIS e SELECTION e DATA COLLECTION e DISPOSITION OF DATA e EXPERIENCE e LONG TERM STRATEGY R:\\ PED \\PJM\\93-29 l l. 1FP" m-% bv4 &ma--e' =me-raw w+W->-mee*#e

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SCREENING CO.MPLETEpATABASE E X C. L. U S I_O. N_S T B A..._S. E D.f.0. N_ I E_P R_ii N S_A C /2020 ~ Al.l? EXC LU.SIO. N. ? B,ASES! D.O. C.U MENTED. ~ ALLIllN_ES7 NOTJEXCLUDED'A.n.RE' ANALYZED .w. R:\\ PED \\PJM\\93-29

e I i 1 ANALYSIS pOALITATIVElRECATIVElgNN;KINGIOFiSOSCEPTABILITY; RISK'OF PERSONNEL INJURY RISK OF PLANT RELIABILITY ISOLABILITY STEAM QUALITY FLUID VELOCITY CONFIGURATION i HISTORY TEMPERATURE .T_OTA,..._EP, H_IGHE_MODER_AT, E._ff t. o._WrSOSCEPTABILI..T.Y, AlflT. E.M_SID_'O,COM.ENT._EDilN_!D, A. T. ABASE.. .m ~ PARA LLEffCHECM ATEMNALYSISl(OFJ HIGH TRAN KEDILINES R:\\ PED \\PJM\\93 29 -,m, .,w .-,-,.,--e.,-e.-_.-,,,,-,-..---.-.---, ,. -.,... - -,+ ---... - -w..,.,c.,w.....m-v. ..,...%...r.. ~, r......m.,.,%.. <-w-..,,.--m--,4-. .%r. ,.mm...... m.,-

=. 1 1 SELECTION KEY TO EFFECTIVE PROGRAM S A_M PLE?SlZElWEIG_HT_E_DI BA$_ED'O N.. T R A N KIN G s-m 'G UIDE LIN ES?EO R?SELECTIONI B ASEDIO N! HISTO RY7C ONFIG U RATION ! QU.E._ilT. Y_iflNd,. D5_IRY_!ENP.ERlE.N. C, E, EETC[ ~ ^ ^ ~ ~ ~ CHECMA_TE?S.E_LE_C_ TION BX_$ESiF. O_ RISE _LEC,T_I_Off.D.UC'.O_M,ENTED, m E 3 i i s R:\\ PED \\PJM\\93-29 i i ..,_.--_-._.._._m ...,.m_.. ...--.m- .... -.._.._-. ;~_.,,, _.. _.

~ h 4 DATA COLLECTION UT, VT, RT, IR - PRIMARILY UT DETAILED] PRO.CEDO.RAllZED[GRIDDINGJINSTRUCTIONS;TO ENSURE CONSTANT [ GRID) LOCATION, UPSTREAM %DOWNSTREA;MiOF{ FITTING e 100% SCAN - LOG LOWEST READING PER AREA R:\\ PED \\PJM\\93 29 L L

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I i DATA ANALYSIS QUALITY CHECK PE_OT_?GR_E_ATEST_m._EA.,, R, _IR..A,T,_E. 0W a. ' e PLOT WEAR RATE AT THINNEST AREA 4 4 i R:\\ PED \\PJM\\93 29 -_.__..-._...,~.._.._...~.__.m._,~.,,~,....._,-.-

DATA ANALYSIS .20 .19 7 .23 .22 .2 B .18 B .20 I.25 A A F 1 2 1 2 1988 1990 At At Al .20 Al .18 .02 A2 .25 A2 .20 .05* B1 .19 .01 B1-.20 B2-.23 B2 .22 .01 .300-k -O-- wear' rate @ Thinnest Area .200-A -#- Greatest Wear Rate .100- '88' '90 '92 '94 '96 '98 'd0 .... ~ .. _. _... _.... _ _.._.... -. -.. _ _.. ~ -.. _. _.,

~ b DISPOSITION OF DATA MINIMUM WALL DETERMINATION _S A M PLE!EXPA N SIOl%G UIDElliN ES] BA S E D! ONIN S AC/202LTWITH A D D ED ! M AIN E l{YAN KEEj;CO N S E RVATIS M. SAFETY CLASS PIPING ANALYSIS REVIEW = REPAIR / REPLACE CRITERIA DOCUMENT ALL DECISIONS R:\\PEDiPJM\\93-29

t DISPOSITION OF DATA .20 .19 - / .23 '. 2 2 / .2 B .18 B .25 . 2'. A A 1 2 1 2 1988 1990 At At Al .20 Al .18 .02 A2-.25 A2 .20 .05* B1-.20 B1 .19 .01 B2-.23 B2 .22 .01 .300- ---O-- wear rate 0 Thinnest Area N -#~ Greatest Wear Rate _~~_ 70% tnom 'N '~ .100-N tmin i e i i i 7 '80 '90 '92 '94 '96 '98 'do

8 ] EXPERIENCE [ L REVIEW INDUSTRY EXPERIENCES FOR APPLICABILITY i DO'CUMENT. M_IIE_REV..I_EWS INSPECT APPLICABLE LIKE COMPONENTS DO'CUMENT;MAlNEWAN.KE_E.!EX_PE,RIENCESMPROVIDE_TO?.CH, UG ~ ~ 3 I 1 i, R:\\ PED \\PJM\\93-29

I LONG TERM STRATEGY REPLACE WITH CHROME-MOLY pH INCREASED TO 9.6 MORPHOLINE coni!NQGHEgM6TEMf@fIlpN INVESTIGATING FLAME SPRAY & OTHER TECHNOLOGIES R:\\ PED \\PJM\\93-29 J w g- ,y_%,-v4- ,,e,w,,,--, c w-sw-+ -,e-- w -.w,.+ rw-- - rw v-m w w e+ + -w a,c*w e.- ,---=i, w y---r,

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H I FEEDBACK e PROGRAM DESIGNED TO EVOLVE & BE UPDATED AS MORE 1 ACCURATE INFORMATION IS ACCUMULATED LINES EXCLUDED AS REPLACED W/ CHROME-MOLY RANKING ADJUSTED AS HISTORY DICTATES e ETC. R:\\PE0\\PJM\\93-29 .e ..w,...ww,,.w.,, ,+-u-.., - ~,,,m -*-v<..J-.- -v-wa,,,----+,,,v., ,,..w,....wi-4.., w. -v,4w w-nr<. v.%,- orwwiw wrr-w,- ,r-~i-+ s,e..,.,.,5=

1 t f Y t i SCHEDULE IMPLEMENT DURING 1993 OUTAGE - R:\\ PED \\PJM\\93-29 i ~ -! ~.1 . - _. -. -..., -... -... _ _...... ~.., . -. _,... _. _., _ _,. ~. _... _.. -......,,..

MAINE YANKEE UNIT 1 s b ECT Ih SPECTION PLAh k 1CC we OUTAGE h ABB/CE l I

1993 S/G SAMPLING PLAN PERFORM BOBBIN EXAMS ON 20% OF THE TUBES IN EACH OF THE STEAM GENERATORS (APPROXIMATELY 1140 TUBES /S.G.). (TECH. SPEC. EXAM = 172 TUBES /S.G.) PERFORM MRPC EXAMS ON 50% OF THE HOT LEG ROLL TRANSITIONS IN EACH OF THE STEAM GENERATORS (2852 Tubes /SG). PERFORM MRPC EXAMS ON AT LEAST 25 U-BENDS TO CHALLENGE BOBBIN COIL SENSITIVITY. PERFORM MRPC EXAMS TO CHARACTERIZE DISTORTED BOBBIN COIL SIGNALS (IF PRESENT). LEAK TEST STEAM GENERATORS THAT SHOW A POSITIVE IDENTIFICATION OF IN-SERVICE LEAKAGE. PERFORM DIRECT AND REMOTE VISUALS ON S G-1. R:\\ PED 4iLJS'.1993SCIP

I SAMPLE MAKE-UP (Based on Previous Experiences with Maine Yankee, CE, and West. SGs) L ALL PREVIOUSLY DEGRADED TUBES TUBES NEAR SUPPORT STAYS TIGHT U-BENDS STEAM BLANKETED AREAS AT LOWER BAT WING ASSEMBLIES TUBE SHEET EXPANSION TRANSITIONS AREAS OF PITTING AREAS WITH A HISTORY OF HEAVY DENTING OR DEFECTS AT SUPPORT PLATES, EGG CRATES, OR SCALLOP BARS TUBES WHICH INTERSECT THE EDGE OF PARTIAL SUPPORT PLATES ALL OF THE PREVIOUSLY UNINSPECTED TUBES SHOULD BE EXAMINED, APPROXIMATELY ONE HALF OF THE TUBES NEVER INSPECTED WITH DIGITAL EQUIPMENT SHOULD BE EXAMINED. (SHOULD COMPLETE 100% DURING THE FOLLOWING REFUELING) R:'. PED 4\\LtS\\1993SGIP

PLUGGING CRITERIA PLUG ALL DEFECTS GREATER THAN 40% THRU WALL i e STABILIZE AND PLUG ALL CIRCUMFERENTIAL CRACK-LIKE INDICATIONS PLUG ALL CRACK-LIKE INDICATIONS PLUG ALL TUBES THAT WILL NOT PASS A .540 IN DIA PROBE REPLACE LEAKING PLUGS i NOTE: STANDARD CE MECHANICAL EXPANDED PLUGS OF INCONEL 690 MATERIAL WILL BE USED FOR TUBE PLUGGING, UNLESS A WELDED PLUG IS ALREADY INSTALLED. WELDED PLUGS SHALL BE REPLACED WITH STANDARD CE WELDED PLUGS MADE FROM INCONEL-690. ) i l R:\\ PED 4tLJS\\1993SCIP I

O s EXPANSION PLAN FOR BOBBIN EXAMS T RESULTS RESULTS RESULTS OF FIRST FIRST OF FIRST SECOND OF SECOND THIRD SAMPLE EXPANSION EXPANSION. EXPANSION EXPANSION EXPANSION C-2 2S C-2 4S C-2 NO EXP. C-3 A C-3 A C-3 A l THE FIRST SAMPLE IS 20% OF THE TUBES IN EACH SG (1,141 TUBES /SG). THERE WILL BE NO EXPANSIONS UNLESS SAMPLE RESULTS ARE C-2 OR C-3 i (C-2) RESULTS FROM A SG SAMPLE WITH 5-10% DEGRADED, OR 1 TUBE TO 1% DEFECTIVE (C-3) RESULTS FROM A SG SAMPLE WITH OVER 10% DEGRADED OR OVER 1% DEFECTIVE ~ SECOND AND THIRD SAMPLES ARE BASED ON S EQUALING 3% OF THE TUBES IN THE AFFECTED SG (S = 172 TUBES /SG) (2S) IS 6% OR 344 TUBES IN THE AFFECTED C-2 SG (4S) IS 12% OR 688 TUBES IN THE AFFECTED C-2 SG (A) IS ALL UNINSPECTED TUBES IN THE AFFECTED SG. AN ADDITIONAL 2S AND/OR 4S SAMPLE IN EACH OF THE OTHER GENERATORS IS PROVIDED FOR IN THE INITIAL 20% SAMPLE. IF AN EXPANDED SAMPLE IDENTIFIES AND BOUNDS 100% OF A DEFECT AREA, FURTHER EXPANSIONS WOULD NOT BE INITIATED. MRPC EXAMS, OTHER THAN AT EXPANSION TRANSITION ZONES, WILL ONLY BE USED TO EVALUATE DISTORTED BOBBIN SIGNALS AND EXPANSIONS WILL BE IN ACCORDANCE WITH THE BOBBIN PLAN. mw sams.

J I EXPANSION PLAN FOR MRPC EXAMS OF EXPANSION TRANSITION ZONES THE EXPANSION PLAN FOR MPPC EXAMS OF EXPANSION TRANSITION ZONES (ETZs) IS EQUIVALENT TO THAT SPECIFIED BY MAINE YANKEE TECHNICAL SPECIFICATIONS. THIS PLAN IS ONLY APPLICABLE TO ETZ EXAMS AT THE HOT LEG TUBE SHEET. PITS WILL BE ADDRESSED IN ACCORDANCE WITH THE BOBBIN EXAMINATION PLAN. 1 THE INITIAL SAMPLE WILL BE 50% OF THE TUBES IN EACH SG (2,852 ] TUBES /SG). THIS SAMPLE SIZE PROVIDES A HIGH LEVEL OF CONFIDENCE THAT A DEFECT MECHANISM (IF PRESENT) WILL BE DETECTED IN EACH I GENERATOR. DEGRADED TUBES ARE THOSE WITH ETZ INDICATIONS LESS THAN 40% l AVERAGE THRU WALL (%ATW) PENETRATION, AS DETERMINED BY MRPC I EXAMINATION. ALL TUBES WITH CRACK LIKE INDICATIONS WILL BE PLUGGED 1 ' AND THIS CLASSIFICATION WILL ONLY BE USED TO DETERMINE EXPANSION j REQUIREMENTS. DEFECTIVE TUBES ARE THOSE WITH ETZ INDICATIONS OF 40% ADV OR GREATER. l TUBES WITH GREATER THAN 45% ATW ARE WITHIN REG. GUIDE 1.121 ^ ALLOWABLES (59% ATW) BUT LARGE ENOUGH TO PROVIDE A RISK OF i LEAKAGE DURING THE NEXT CYCLE. A GENERATOR WITH AN ETZ INDICATION OF >45% ATW MAY REQUIRE ADDITIONAL EXAMINATIONS TO MINIMlZE THE RISK OF MID-CYCLE LEAKAGE OR UNDESIRABLE CRACK GROWTH. THE ATTACHED " EXPANSION PLAN FOR BOBBIN EXAMS" WILL BE APPLIED TO MPPC EXAMS OF ETZs, WITH THE LIMITATIONS SPECIFIED ABOVE, TO ASSURE TECH. SPEC. COMPLIANCE. ( i R:\\PEDCLJS119935C:P

_. _._.. =. l 3 June 1993 I CHG 930603-01 r MAINE YANKEE 1993 REFUELING OUTAGE MECHANICAL PROJECTS BY CORPORATE ENGINEERING DEPARTMENT (CED) i t i' l. SERVICE WATER ANNUBAR PROJECT 2. STEAM GENERATOR INSPECTION PROGRAM (SEPARATE PRESENTATION) i i 3. STEAM GENERATOR PRESSURE LOSS MITIGATION PROJECTS 4. REACTOR THERMAL SHIELD INSPECTION AND REPAIR PROJECT F 5. SERVICE WATER PIPE LINING PROJECT 6. REPLACEMENT OF HELB ISOLATION VALVE FOR LET DOWN SYSTEM (LD-M-2) i 1 i 1

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SUPPORT 4 s m' y i PIN ..M v' ? A~T..y; L W} A.,. j mug j q , 4 , y; f' t [/ y 'C: ? .J . J. [ [ [ 3 -.'Owlkp Wg l qw 3 qy e I f I hi.. ^ v j m.< --.,d'. .. b[g b 'k g .::W' , kdp%yy? g .pt : - M \\ a 3;/a i Igbe, Mba,1.. 35$5 jNt.. j k 4 49 ) \\' - + NTHERMAtlSHIELWW l i !SUPPCRThM.hWM[iA j F r Lw},t iS:,$g, 4 SHlM ; NWd,, M 4 +g S wn ge-f- %gy:n 2 i x 44 041# j Ni3 M h{73 i LOCK BAR J \\ f'.. %g algas a .y - -..~ -JR.y-- gf ' A2 - a! Tf a s&,YD' PIN :* c POSITION;NG ?,.. Y$ N . ' -lup J f M9 Q ~ &&? $$.n,i>RW ~^~ 1 g7*i ."w...'. n: a r M. irf. ;n.-.:ts !c t:c.gagjp a .n yaggy C3 . aMn w R.X 1-G.p[,R

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u 6 h SHIEL f) ( ) \\ f i 1 n i / 1 I i \\ Y CORE / Il SVPFOA T BARREL i L 4 i DETA/l B

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l @lNSTALLATION l l The Product i I i

• The Insitutubet product is custom manufactured Imm l

.mN an clastomeric coated. Dexible. fiber felt material to the specified diameter, length, and thickness required for a project. The Insitutube material is then saturated with p a liquid thermosetting resin. Next. the tube is imened. j (stage 1) or turned inside out. using hydrostatic pressure. into the damaged pipeline through an access point. l a 1 d r w" " j w i

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L . I,_ J L'm% _., s j The water used for inversion pushes the tube through the notpa.s cecuuciou damaged pipeline (stage 2). The hydrostatic force tums the ,PE 2 tube inside out and holds the resin saturated side firmly llNVERSION z against the inside w211 of the old pipe. As the tube moves iHALF CO ~ l forward, it pushes any fluids standing in the pipeline ahead M.. l I ( of it. Because the Insitutube material is flexible, it can ~ 'Q negotiate changes in elevation, bends, and offset joints, and l conform to the size and shape of the old pipe. The smooth coated side of the Insitutube material becomes the new interior pipe wall. <... p a kY. ? u w., KS.' = I

• i When the tube is fully inverted over the length of the pipe to

( re ~ be repaired (stage 3) the water in the pipe is heated to cure ,e' the thermosetting resin system. creating the Insituptpe, a pipe 'W, within a pipe. The resulting pipe is structurally sound and ) .L f c. jointless..and because the new interior wall is smoother l I" than the original the flow capacity can ty pically be inereased. l 1-It j ^

4 In gravity flow applications. lateral imes are reopened w ithout t"

digging from the inside of the new pipe by an Insitueuner? a i J remote controlled robotic cutting des ice. A finai inspection ~~ d is made via closed circuit sideo The et: tire procedure. start

to finish, can be completed in hours u ithout excavation. and l

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