ML18142B878

LER 1975-009-00 for R. E. Ginna, Pinhole Leak in Cap Attached to Magnetic Control Rod Drive Rod Travel Housing K-7

ML18142B878
Person / Time
Site:	Ginna
Issue date:	04/22/1975
From:	White L Rochester Gas & Electric Corp
To:	O'Reilly J NRC/IE, NRC Region 1
References
LER 1975-009-00
Download: ML18142B878 (4)

Text

NRC'TRIBUTIQN FOR PART 50 DOCK MATERIAL (TEMPO A A R Y Fo RM)CONTROL NQ: FILE.XNCXDEHZ REPORT AXLE CLASS UNCLASS XXX PROPINFO FRQM:Rochester Gas 6 Electric Rochester, NoY, Co.TO:.Tames P, O'Reilly 4-22-75 ORIG 1 Signed INPUT 5 5 75 CC OTHER No CYS REC'D'1 DATE OF DOC DATE REC'D LTR TWX RPT OTHER XX SENT AEC PDR SENT LOCAL PDR DOCKET No: 50-244 DESCRIPTION:

Ltr.trans the followingo

..~PLAN1 NAME.RE Ginna ll 1 ENCLOSURES:

Abnorm.Occurr.5 75-09, on 4-10-75, concern-ing Pinhole leak in canopy section od cqp above seal weld of cap to housing,.c,.e

'3 i 1 cy.Encl.+AC'd) n,'gQ~.r i,.k<~" FOR ACTION/INFORMATION VCR 5-8-75 BUTLER (L)W/Copies CLARK (L)W/Conies PAAR II I W/Copies KNIEL (L)W/Copies SCHWENCER (L)W/Copies STOLZ (L)W/Copies VASSALI.O Il)W/Copies EMPURPLE (L)'W~/opies ZIEMANN (L)W/Copies DICKER (E)W/Copies KNIGHTON (E)W/Copies YOUNGBLOOD (E)W/Copies REGAN (E)W/Copies LEAR (L)W/Copies SP(-I S W/Copies W/Copies-G.Jk: TECH REVILW PDA DISCI.IAOEDER OGC, ROOM P-506A A'I/iACCAAY GOSSI CK/STAF F KNI G HT~CASE PAWLICKI GIAMiBUSSO SHAO BOYD+~~ST E L Lo MOORE (L)~HOUSTON DFYOUNG (L)"""~NQVAK SKOVHOLT (L)~ROSS GOLLER (L)(Ltr)~IPPOLITO P.COLLINS rd'TEDESCO DENISE LONG AI=G OPR LAI NAS~FI I E 5 REGION (2)BENAROYA~.'<PC/~~f3)~VOLLME R STEELE INTERNAL DISTR I BUTIoiN D E NTOI"II LID ASST~G R IMiES R.DIGGS ILI GAMMILL H.GEAR IN (L)KASTNER E.GOULBOURNE (L)BALLARD P.KREUTZEA (E)SPANGLER J.LEE (L)M.MA I G R ET (L)ENVI Ro S.REED(E)MULLER M.SERVICE (L)DICKER rS.SHEPPARD (L)KNIGI.ITON W M.SLATEA (E)YOUNG BLOOD I-I.SMITH (L)REGAN S.TEETS (L)PROJECT LDA G.WILLIAMS (F)V, Wll SON (L)HAR LESS A.INGRAM (L)EXTERNAL DISTRIBUTION A/T IND.BRAITMAN SALTZMAN iVIE LTZ PLAh-ACRS SEi;r TO LX" ASST~<SEND OKY TEil DAY REPOiRTS'0l 1-PD R-SAN/LA/NY 1-BROOKHAVEN NAT LAB 1-G.ULA IKSQN, ORi'J L 1-AGMED (RUTH GUSSMAN)Am B-127 GT 1~J.D.RUNKLES, Am E-201"-..GT c////////////

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ROCHESTER GAS AND ELECTRIC CORPORATION

'd>Cf~I.I I'"'t lI0!Nd1 4>>>>~0>>l>>110 I'Idld'I I.IIAI~o 89 EAST AVENUE, ROCHESTER, N.Y.14649 I.EON D.WHITE.JR.VICE PRESIDENT TEI.EPNONE AREA COOK Tld 546-2700 Pprili~23,$+75 EC r IIIE IISSa<Mr.James P.O'Reilly, Director U.S.Nuclear Regulatory Commissi n Office of Inspection and Enforcemen Region I 631 Park Avenue King of Prussia, Pennsylvania 19406@gal IP*I A"lt p/rd.oI~'~

Subject:

Abnormal Occurrence 75-09, Pinhole leak in cap attached to Magnetic Control Rod Drive Rod Travel Housing K-7 R.E.Ginna Nuclear Power Plant, Unit No.1 Docket No.50-244

Dear Mr.O'Reilly:

In accordance with Technical Specifications, Article 6.6.2a, the attached report of Abnormal Occurrence 75-09 is hereby submitted.

Two additional copies of this letter and the attachment are enclosed.Very truly yours, L.D.White, r.Attachment cc: Mr.Donald P.Knuth (40)

LICENSEE EVENT REPQR CONTROL BLOCK: (PLEASE PRINT ALL REQUIRED INFORMATION)

UCEN SEE NAME Qg N Y.R 5 G I 7 89 14 15 LICENSE NUMBER 0 0-0 0 0 0 0-0 0 25 LICENSE EVENT TYPE TYPE 4 1 1 1 I~01 26 30 31 32 REPORT REPORT CATEGORY TYPE SOURCE DOCKET NUMBER EVENT DATE[oagcom'MI T L 0 5 0-0 2 4 4 0 4 1 0 7 5 7 8 57 58 59 60 61 68 69 74 REPORT DATE 0 4 2 2 7 5 75 80 EVENT DESCRIPTION toad]Visual inspection of caps on CRD rod travel housings revealed a powdery deposit on 7 8 9 (80 I the K-7 cap.Subsequent dye penetrant examinations revealed a pinhole leak in the 7 89 80 tOOj4 canopy section of the cap above the seal weld of the cap to the housing.The PORC 8 9 recommendation of replacement of the cap was carried out.Abnormal Occurrence

@75 50-244 75-09.7 8 9~~06 COMPONENT MANUFACTURER 1 2 0 48 7 8 9 Jog omega seal, the threads, and ultimately through a machining defect at the thinned 7 8 9 FAME SYSTEM CAUSE COMPONENT CODE CODE COMPONENT CODE SUPPLER VIDLATGN~CA~E C 0 N R 0 D N N 7 8 9 10 11 12 17 43 44 47 CAUSE DESCRIPTION Jog A parently insufficient torque down of cap permitted path of borated water up through 80 80 80 7 8 9~10 wall section of the cap.OTHER STATUS NA AMOUNT OF ACTNITY NA NA NA 7 89 FACIUTY STATUS 55 POWER~oo o 7 8 9 10 12 13 FORM OF AcrrvrrY CDATENT RELEASEO OF RELEASE Qg H z 7 8 9 10~.11 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Pg Locoo I 8 7 8 9 11 12 13 PERS'ONNEL INJURIES NUMBER DESCRIPTION

~~~~oo o ,7 8 9 , 11 12 METHOD OF DISCOVERY b 44 45 46 44 45 DISCOVERY DESCRIPTION visual and dye penetrant test LOCATION OF RELEASE 80 80 80 80 80 80 OFFSITE CONSEQUENCES

[<is]7 8 9 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION

~16 7 89 10 PUBLICITY pi~]7 89 ADDITIONAL FACTORS[ice]7 89 NA NA NA NA 80 80 80 80 7 89 NAME: Charles E.Platt PHONE.3 1 5-52 4-5 35 1 80 GPO 881 88T V-"I P~I t cr~~~'c<" E~