ML20085A626
| ML20085A626 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 07/19/1991 |
| From: | Schnell D UNION ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| ULNRC-2440, NUDOCS 9107250233 | |
| Download: ML20085A626 (4) | |
Text
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Donald F. Schnell e UNIOiN, sena ,. ,; new^ ^s n, blECTRIC '
w, h3 July 19, 1991 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Station Pl-137 Washington, D.C. 20555 ULNRC-2440 Gentlemen:
DOCKET NO. 50-483 CALLAWAY PLANT ADDITIONAL INFORMATION CONCERNING Tile CALLAWAY PLANT INSERVICE INSPECTION PROGRAM PLAN This letter transmits Relief Request Q to the Callaway Plant Inservice Inspection Program Plan. NRC staff approval of this submittal is requested by December 1, 1991 so that this inspection may be performed during the Refuel V outage which is scheduled l to begin in March, 1992. A similar relief request has been approved for Wolf Creek Nuclear Operating Corporation.
If you have any questions concerning this letter, please contact us.
l Very truly yours,
,/ g, 4 Donald F. Schnell WEK/ dis Enclosure d<$0d 83 8 \
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cal.l.AWAY 181
- ,: ItEl.1EI' REQliEST Q Component: 2RHB01-01, 02, 03, 04
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LCatngotyi F-A 4
LDoncrIptiont : Ronc tor Pressurn Vossn t' Support s
-Codo Requirement:
Section XI Tablo IWF-2500-1, item No. Fl.40 requires n i visuni exnmination (VT-3) in accordanen with the requirements .
of IVF-2510.
4 Dasis-for Polior:- Complotn examination of t he NF por t.f on o'r tho above support s is hindorod by high radiation, the insulnt ion surrounding thn s nactor pr ossure vossel and the surrounding concrot o at ructer o. In .
o visunIly examinn tiusso supports, tho Insulation nud wnik pinton would have to be removed tmenuso no portion of the air cooled box and attachment botting to the building structuto is visible. 'Even after removing tho ;
insulation, only a limit ed portion of the unids on the nir- >
cooled box could bo inspected. The bolting to the building.
structure would still bo inaccessiblo. The radiation-level
~
i in this aren is grantor t.hnn 1,5 R/hr, it is estimnted thnt the removal and reinstallation of the insulat.fon and walk .
platos, combined wit h t ho actual inspect ion of t he accessible portion of the air cooled box, would result in npproximately 36-man-rem-exposure, Therefore, permanent rollof is-requested to only porform inspect. ions on tho visible portions of the support s without removal of the wnik plntes and .;
insulation.
Alternato Examination: A'visuni inspection of thn shoo nasombly and wonr pinte will
, bn porformed to thn maximum exteut prnrtIcal during iho noxL ,
refueling without rnmoving tho insulnt lon nnd walk plat es.
TASME Codo Section III: Support shoes and air cooled-box structures roccived tff or PT, trr and VT oxnmiontions prior to installntion. The installat ion was nico luspncted to sito quality cont rol proceduren.
Evnluntion of P)nnt. St.r tngont. ASilE Section- III, Subsect ion NF rpinlity assuranen -
Safet y: programs worn ut.1117.ed in the donign, Inbrientlon,.nnd
. Installation of thenn Clann 1 components. Section Ill examinations confirmod support integrity during construction.
Thn air cooled box, supporting the Reactor Pressuto Vossol, i is a rigid 9tructurn. The intornni atructural mnmbnrs with innecessible wolds are in compression. .The absence of tensile, or bonding moment lands diminishes the importancn of wold inspections. *lho main function of thnso volds 1s- to
- hold -the members in pinen rathor than t rnusint direct 'londs ;
- to thn hullding structuro.
Unsed on the_nbove, n satisfnctory level of sofoty is
-provided without requiring comploto oxnminntion of t he NF partion of thnse supports. Any nignIfiennt-dogrndntton to the support structurns will bn identilled by t.ho l imi t ed inspect lons, nnd approprint o cor r oct.tvo nctions wouId then be taken to ensurn at ruct urnI integrity,
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4 STATE OF MISSOURI )
Donald F. Schnell, of lawful age, being firnt duly sworn upon oath says that. he is Senior Vice President-Nuclear and an officer of Union. Electric Corupany; that he han read the foregoing document and known the content thereof; that he has executed the same for and on behalf of said company with full powel and authori ty to do so; and that the f acts thereiri stated are t rtie and correct to the bent of his knowledge, information and belief.
By k(
Donald F. Schnol1
.1 Senior Vice President Nuclear SUBS RIBED and nWorn to before me thin NII day of _ d i- , 1991.
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.A/ $ b".YM y BARGAHA ). PFAFF ~ F NOTARY PUBUC, STATE Of MISSOURI YY C09Miss10N [1/lRilS APRll 22* 19'33 ST. LOUIS COUNTY
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T cc i- T. A. Baxter, Esq.
Shaw, Pittman,_Potts & Trowbridge 2300 N. Street, N.W.
Washington, D . C .- 20037 Dr. J,-0.-Cermak CFA, Inc.
18223-A' Flower 11111 Way .
Gaithorsburg,-MD 20879-5334
-R. C. Knop Chief, Reactor Project Branch 1 U.S._ Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Bruce Bartlett Callaway Resident Office U.S. Nuclear Regulatory Commission RRit1' Steedman, Missouri 65077 M. D. Lynch (2)
Office of_Nuctear Reactor Regulation U.S. Nuclear Regulatory Commission-1 White Flint, North, Mail-_Stop 13E21~
11555 Rockville Pike Rockville,-MD 20852 Manager, Electric Department
' Missouri Public Service Commission P.O. Box 360-Jefferson City, MO 65102 r t- 'f--* <--'r-*ww-- v*s= wry w *
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