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Rev 0 to Procedure GE-UT-307, Procedure for Ultrasonic Exam of Reactor Pressure Vessel Closure Studs
	ML20058C350
Person / Time
Site:	Cooper
Issue date:	11/15/1993
From:	Miller W; GENERAL ELECTRIC CO.
To:	;
Shared Package
ML20058C322	List: ML20058C319; ML20058C333; ML20058C350; ML20058C373;
References
	GE-UT-307, NUDOCS 9312020429
	Download: ML20058C350 (27)
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3, ; ?$~ *,f-iect Cooper Nuclear Station fqject go, TA161 Us# No.* NPPD-91-35 Date 11 91

&aanent to Be O.anged Pro'cedure for Ultrasonic Examination of Numbec GE-UT-307 RPV Closure Studs Rea:om Change h Bequerred To Meet NPPD' Requirements l

l hopc:af Change.

fi-Delete--Paragraphs 5.3.1, 5.3.2,,.5.3.3, and.5.3.4.

Replace with new 5.3.1, 5.3.2, l

5.3.3, 5.3.4,- tol read as follows:

5.h.1 # Sweep' Range Calibration.. Using.a suitable Calibration Block,. adjust the instrument sweep to display a minimum of 50" of Metal Path.

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5.3.2-System Calibration and construction of DAC's shall be performed using

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Field Revision Request yect Cooper Nuclear Station sctNa TA161 / RRNA _NPPD-91-35 Date 11-15-91 t-I 5.3.3 (cont'd) response to 801 FSH. Mark the signal's position and amplitude on i i f the CRT. Without changing gain, obtain a response from the remaining slot. Mark the position and amplitude on the CRT. Connect these points and extrapolate them to cover the examination range. This is primary reference level for Zone 1. Mark a second curve 20% of primary reference level on the CRT. Record instrument settings and DAC's on the Calibration Data Sheet. ~ 5.3.4 The Zone 2 DAC shall be obtained using a 10.0.MHZ nominal frequency transducer from the flange end of the block? Obtain-signals from. slots A and D in the calibration block. - Set.the, higher amplitude response to 80% FSH. = Mark the signal's position-and amplitude on the CRT. Without changing gain, obtain a response. from the remaining slot. Mark the position and amplitude on the. CRT. Connect these points and extrapolate them to cover the examination range. This is primary reference level for Zone 2. Mark a second curve 20% of primary reference level on.the CRT. Record instrument settings and DAC'.s on the Calibration. Data Sheet. ,,,c,.. .7 .,y.,s... ..p.,,...n,.,..m.,..... ,. g,g j y,.3 4 4 f 4 .. q c.s.. f2 Delete-5.3.4.1, 5.3.4.2,.5.3.4.3, 5.3.4.4,.5.3.4.'i,.5.3.4'.6. I l f3 Change 6.1.1 to read as follows: l For Zone 1, the examination should be performed with search units ..~.~with a,frequencytwithin.the. range.of.2.-25.MHZ,,,5.0 MHZ...pFor, Zone,,,,,,,,. 2,1the examination should be performed using search units.with; L, ..,,... thin the range of 5.0 MHZ - 10.0 MHZ. a frequency wi i .,, g,,. 3 c m. r,_... ;. g,.,,,,,, .,,,..y ..n.. - Change 6.1.2.to read as follows: 54 >~iwr :, Sgtsp r. j._ s. g %.e.n.myg.:;.y2 r.;eqJ5;i.f y,* ..,g.: Qg,;"-;.. % :#fAS!: "f ' - Scan at a ' gain setting of twice _(2X)1 primary reference l'evela ~ ~ l Record at primary reference level. ~. w ;;-wm;r. n. :. ~.si.. s.:.;5 4 ~... p r.: w.:.m:,9gdyp, 3.; p zz9. g y. 3 Change 6:1.4 to read as follows. .s 1 . W /The examinations.shall'be performed.in Zones that corr,espond to i " 'to those established during~ calibration.' -

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,. Field. Revision' Request \\ c p,og Cooper Nuclear Station TA161 i Psoject No. fgg ya NPPD-91-16 Dare 9-16-91 -l .i Document to Be Changed Procedure for Ultrasonic Examinations of Nurnber-CE-UT-307, Rev. 0 Title-RPV Closure Studs l Reason Change is Requestet ? To meet customer requirements. j r l 6 hoposed Damge- [ Chan[e' the last sentence in paragraph 4.5.2 ' to read: Total residual'; sulfur:and. halogen content shall not' exceed the: following: ~ ' l [

Fluorine - 300 PPM j
Chlorine - 500 PPM i

Sulfur - 700 PPM

Halogen Ciange'sbute'nceT. inE'paradiph' 5.511t'o lr' ad: ' ' Move the? pnhn' away 'fr' $thefno%g f

l ' ".y e o until the amplitude'of.the signal is,50% (-6dB) from"the mad num. e.pg:sg ygg.. j m - u ~ .g Ik Add new Ultrasonic Calibration ~ Data Sheet, Exhibit I. ' f[.)y,, ... t, 9 y l v' Add new Ultrasonic Eramination Data Sheet, Exhibit II. e X ulp;).4 ds w.i

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t .} O* i 3 NUtW!1: GE-UT-307 REV. O ~ PAGE 16 OF 19 1 TITLEi PROCEDURE FOR ULTRASONIC EXAMINA-TION OF RFV CIDSURE STUDS l GENuclear Energy .. we.am-i ~ I t } i CALIBRATION ELOCK SET - - I l FOR STRAIGHT BEAM EXAMINATION l FROM THE END DF THE STUD i e e 5 1 l 9 I i 1 t - llU k 3 1/8 LENGTH ~ 1 i { +1 o FLAT BOTTOMED HDLE DIMENSIDNS l j 3/8' X 3.00' DEEP ' ~ j _. iff i A.._.h 1/4 LENGTH j i 1 e.. a / II tfl! i e i Mk[l ---J 1/2 LENGTH l f!LA ) ll-. ll [Ll l I lij ] hh 9 ; 3/4 LENGTH 1 0 l ; t..y /

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i i l ~ NUMBER: CE-UT-307 REV. O PAGE 17 OF 19 TITLE: PROCEDURE FOR ULTRASONIC EXAMINA-MN OF RW @SEE SMS GENuclear Energy .) CALIERATIDH ELDCK ll FOR ANGLE EEAM EXAMINATION FROM THE EXTENSIDMETER HDLE s u - ?A 4F_C =_ r r n = _:/=::--: : ji

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j t, r I l NUMBER: GE-UT-307 REV. O PAGE 19 OF 19 I ( TITLE: PROCEDURE FOR ULTRASONIC EXAMINA-l TION OF RPV CIDSURE STUDS \\<, GE Nuclear Energy i i FIXTURE FOR EXAMINATIDNS PERFDRMED FRDM THE EXTEllSIDMETER HDLE i LDCKING CDLLAP r--- - - - - - - 9 3 I O j _ FULL j CDLLAR (TDP VIEV) LENGTH ? SCRIBt. j 'TERING _-} lI TERG DN FORE FACING l1 SEARCH / ,Y UNIT l / f l i t I I I l.: !l / 00 DN COLLAR RDT5TED / ~~ } AND.LDCKED TD THE [ /:~~ + INDEX HARK DN THE STUD - + = ANGLE MARKS AT 50 h INCREMENTS GRADUATED IN.1# INCRE-t--) i HENTS VITH l' P.INGS l t. FDRE l AFT ]LFORE ~ FACING m, FACING 4, FACING SEARCH UNITS FIGURE 4 ) I i +,. ,,.,.,-,...,--e.-- .----en. --n... , -,}}

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