ML20149L899

Revised Technical Specification Pages for Plant Units 1 & 2

ML20149L899
Person / Time
Site:	Farley
Issue date:	11/06/1996
From:	WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
To:
Shared Package
ML19353D993	List: ML20149L884 ML20149L888 ML20149L899 ML20149L903 ML20149L911
References
NUDOCS 9611190267
Download: ML20149L899 (23)

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1 Revised Technical Specification Pages 9611190267 961106 PDR ADOCK 05000348 P

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asAc?ce coeLAar? BYSTEst i.

SUovttLLAsoct nagurmeerts (Centanuede l

J1 4.4.6.4 Assestense Criteria I

A used La this Speelfasettes a.

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asene as eseepties to the diseastems, ea w eenteer er a tee w elsewe gren smet required by f abrisetten drawinge er spectiteetions.

j edey-surrent teettag tadieettene below 394 et the maakael we11 thiekaeos, at deteetehle. may be i

semeldered se taperfeettene.

3.

Dealedettes means a service-tadeeed steektog, wastage, wear os general corresten oecessing an either instee j

I et esta&de of a tube er sleeve.

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amene a tee, testadies the sleeve 18 sepsised, that aseteine

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seenfeettens gratu een u e,sel to get et the acatant we11 thgetases enesed by degredottaa.

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asees es pereestege of the see og i

e un l

etaees affected et removed by dogsadotaes.

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amene en lepea$esties of eesh neweetty that at the plegglag as sepose 1Antb A tee or i

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eleeve esotasatag a desset is essestsee, s

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ac 4 % % Wskeek below 6"*",,,*g3 g,'*g* "g*,7

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d nweem = semoved fam e=W br pies,1 g aw 1.

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9)tNo k8d \\#'#f WMded Sk88/f pseetos them et egent to 494 et the asetaal tube well y

thieteses. pet a tee that has been sleeved with a 1

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r* 7*f g g ?g#S$9 4 4M asehea&eal je&at sleeve, $"[elease sans=1 all t

me11 penettetten of eneetw thea = e, t to Eco led -Ne. iv she.\\\\eE stesve w

atmem as me ele==

gesses the see te n.

g rec 4b *gg Skd8Vg Eg L"$fQ removed from servles plegglag. See a tee that hee I

been sleeved utth a jetas eleses, thace$ well 4A pe.etmue gn=ter es. = egent = s**

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J moetest unal th&eheses &a the e&sete hetueen the weld 4

3.ame t

me see t...es ww f.es.=*= br i

plagstas. Taas eessaatsen enes not apply to see suppest ptees teosseestaans ser uhte the settege-t n

d p1 eestessa ue besag egelses. nefw te

4. 4.g. 4. a. 1 the plegging 11mit app 1&seble to j

these&atessestaans.g

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deseentes the esadst&an of a tube or a

e oeve teste se aesta&a a defeat lasgo seesch

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to afgest its stancessel 1stagetty &a the event of as 4

j eyesating Reste Beethgsahe, a lese-of-seeleet i

sesidset, se e steam 11ee os feedustee 1&me broek as speetfied la 4.4.6.3.e, above.

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suavt;;Lnoct agog! AmsDrfs (centansedi

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me u.aeu.ee.....,,e.,emene, m,te M e. d ea.E M g,

g. aerates twee~ free the potet og essay thog tog egge templetely erewed the U bend to the to i

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y*A7 eetd tes a en a tee th.t ha b..e

.p support et the sleeved pestice of the tube.sleevtet, the tee tespe

,new h, g

ifee. A i

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te. o....e.. to es mie.

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. tee.at..

desstated By Westleghouse report ocAF-11110. env or laser welded sleeving,.a dess 1hed by seattagn 1,

g% /,4. 4 h-1.ent seas-lionante a. e..d u teua. t.ose.

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f t,e. e.a e =r,=14..o. u.=vs eerroetave se proveettwo enesere. t.ne.s n

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Pro.eavise 1-^

3t= esame as tospeettee of the tvil Irp et seem tune le ese steen generator perfeamed I

by addy eussent tede& gees petes to servies to i

m in.pe.o.a eeestohitok a hose 1&as emedattee of the tub".

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b,d.estone to.n he,eu.e.ned..te., e,iJd,.-its ee to.

e. e disstag subsogeest &aservtes taspections.us AbA W

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/ Af} & hyM9 d"$ O so. 4e.e eersesten esesmag,e uea ade== ~

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satteed utth&a the th&ethsas et epp1&eeble te, testee as tee esopost plans ' - mt eyeSe sely.

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ape &r laaet Se beoed en -a-a-

_ stema setas tehe oeswiseab&11ty as deser,thed Degradet&as attaiheted to sets &de dienster a.

etsees cessestes eseektag estthis the heuede d the ttske them er piste enth behh&a weltage less to 3.0 welta en11 he e&&ound to sema&a &a soevne.

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Begradetaes ettelbuted to seaside etaseter essees eneses&m weettes esthsa the houses or the **e siepost pteen utek a hebbsa vetuge greates een 3.0 sente us24 he repeases es pliseged eseeps as ested &a 4.4.4.4.e.11.e helse.

Ied&estaans ei potest&al dogsadettaa estettsted e.

to oute&de d& assess stones sesses&am eseek&eg with&a me besses et me see segpost place wie i

e both&a sottogs geestes them f.e sette het toes than se espan to 5.s sette mer remasa sa wavses i

18 a seteeseg peceshe se&& &aepostaan dose met i

deseet dessedetase. redteettees og eeuten diameter essess meses&as seachtag deseedettee wtth a bath &a vettego geseter thea S.8 welu v111 he plugged w repeased.

FM1 3/4 4-32s N e#. M.IU t;

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RFAC'Ich COOLANT SYSTEM SURVEILIANCE REQUIRD(ENTS (Continusd)

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6.

Plugging or Repair Limit means the imperfection depth at or

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beyond which the tube shall be repaired (i.e., sleeved) or removed from service by plugging and is greater than or i

f4t echkiOA. Dr equal to 40% of the nominal tube wall thickness. This l

g "f/u/ Q definition does not apply for tubes that meet the F*/L*se M

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criteria.

For a tube that has been sleeved with a j

% hery*e/[ Y M mechanical joint sleeve, through wall penetration of greater k

than or equal to 31% of sleeve nominal wall thickness in the l

sleeve requires the tube to be removed from service by gh ge d)f8M plugging.

For a tube that has been sleeved with a welded j

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joint sleeve, through wall penetration greater than or equal l

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4 to 37% of sleeve nominal wall thickness in the sleeve b

between the weld joints requires the tube to be removed from j [hpah g

service by plugging. This definition does not apply to tube support plate intersections for which the voltage-based

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g repair criteria are being applied. Refer to 4.4.6.4.a.16 1

O fortherepairlimitapplicabletotheseintersections.g j TYM 1

7.

Unserviceable describes the condition of a tube or sleeve if it leaks or contains a defect large enough to affect its l

structural integrity in the event of an operating Basis Earthquake, a loss-of-coolant accident, or a steam line or t

hC. g/kd feedwater line break as specified in 4.4.6.3.c, above.

M Tube Inspection means an inspection of the steam generator g/

If tube from the point of entry (hot leg side) completely gM around the U-bend to the top support of the cold leg.) For a f

pM tube that has been repaired by sleeving, the tube inspection i

/pg/enJ hN should include the sleeved portion of the tube.

9.

Tube Repair refers to mechanical sleeving, as described by l

Westinghouse report WCAP-ll178, Rev. 1, or laser welded I

sleeving as described by Westinghouse report WCAP-1267,

f which is used to maintain a tube in service or return a tube

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to service. This includes the removal of plugs that were installed as a corrective or preventive measure.

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f L* Criteria is applicable to Cycle 11 only.

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FARLEY-UNIT 2 3/4 4-12a AMENDMENT No.115 l

4 4

j REACTOR COOLANT SYSTEM SURVEILIANCE REQUIREMENTS (Continusd) i-15.

Tuba ExpSneien is that portien of a tubs which has bacn increased in diameter by a rolling process such that no J

crevice exists between the outside diameter of the tube and

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the hole in the tubesheet. %

16.

Tube Support Plate Repair Limit is used for the disposition of an alloy 600 steam generator tube for continued service that is experiencing predominately axially oriented outside diameter stress corrosion cracking confined within the thickness of the tube support plates. Attubesupportplatel l

intersections, the repair limit is based on maintaining steam generator tube serviceability as described below:

Steam generator tubes, whose degradation is attributed l a.

to outside diameter stress corrosion cracking within the bounds of the tube support plate with bobbin j

voltages less than or equal to the lower voltage j

. repair limit (2.0 volts), will be allowed to remain in service.

1 b.

Steamgeneratortubes,whosedegradationisattributedl j

to outside diameter stress corrosion cracking within the bounds of the tube support plate with a bobbin voltage greater than the lower voltage repair limit j

(2.0 volts), will be repaired or plugged except as j

noted in 4.4.6.4.a.16.c below, i

c.

Steam generator tubes, with indications of potential i

degradation attributed to outside diameter stress j

corrosion cracking within the bounds of the tube j

support plate with a bobbin voltage greater than the i

lower voltage repair limit (2.0 volts) but less than i

or equal to the uppet voltage repair limit *, may i

remain in service if a rotating probe inspection does I

not detect degradation. Steam generator tubes, with I

indications of outside diameter stress corrosion j

cracking degradation with a bobbin voltage greater

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than the upper voltage repair limit *, will be plugged l j

or repaired.

sw aho ref=cs A NWk *f" d***

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The upper voltage repair limit is calculated according to the methodology in Generic Letter 95-05 as supplemented.

FARLEY-UNIT 2 3/4 4-13 AMENDMENT No.115

REACTOR COOLANT' SYSTEM SURVEILLANCE REQUIREMENTS (Continued)

'4.4.6.4 Acceptance Criteria

a. As used in this Specification:

1.

Imperfection means an exception to the dimensions, finish or contour of a tube or sleeve from that required by fabrication drawings or specifications.

Eddy-current testing indications below 20% of the nominal wall thickness, if detectable, may be considered as imperfections.

2.

Degradation means a service-induced cracking, wastage, wear or general cotrosion occurring on either inside or outside of a tube or sleeve.

3.

Degraded Tube means a tube, including the sleeve if the tube has been repaired, that contains imperfections greater than or equal to 20% of the nominal wall thickness caused by degradation.

4.

% Degradation means the percentage of the tube or sleeve wall thickness affected or removed by degradation.

5.

Defect means an imperfection of such severity that it exceeds the plugging or repair lindt. A tube or sleeve containing a defect is defective.

6.

Plugging or Repair Limit means the imperfection depth at or beyond which the tube shall be repaired (i.e., sleeved) or removed from service by plugging and is greater than or equal to 40% of the nominal tube wall thickness.

For a tube that has been sleeved with a mechanical joint sleeve, through wall penetration of greater than or equal to 31% of sleeve nominal wall thickness in the sleeve requires the tube to be removed from service by plugging.

For a tube that has been sleeved with a welded joint sleeve, through wall penetration greater than or equal to 37% of sleeve nominal wall thickness in the sleeve between the weld joints requires the tube to be removed from service by plugging.

This definition does not apply to tube support plate intersections for which the voltage-based plugging criteria are being applied.

Refer to 4.4.6.4.a.ll for the plugging limit applicable to these intersections.

For a tube with an imperfection or flaw in the tube sheet below the lower joint of an installed elevated laser welded sleeve, no repair or plugging is required provided the installed sleeve meets all sleeved tube inspection requirements.

7.

Unserviceable describes the condition of a tube or sleeve if it leaks or contains a defect large enough to affect its structural integrity in the event of an Operating Basis Earthquake, a loss-of-coolant accident, or a steam line or feedwater line break as specified in 4.4.6.3.c, above.

FARLEY-UNIT 1 3/4 4-12 AMENDMENT NO.

~... - - - - -...~ - - - -

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REACTOR COOLANT SYSTEM SURVEILLANCE REQUIREMENTS (Continued) 8.

Tube Inspection means an inspection of the steam generator tube from the point of entry (hot leg. side)fcompletely around the U-j bend to the top support of the cold leg.

For a tube with a tubesheet sleeve installed, the point of entry is the bottom of the tube sheet sleeve below the lower sleeve joint.

For a tube f

that has been repaired by sleeving, the tube inspection should i

include the sleeved portion of the tube.

9.

Tube Repair refers to mechanical sleeving, as described by Westinghouse report WCAP-11178, Rev. 1, or laser welded sleeving, l

as described by Westinghouse report WCAP-12672, or, for elevated sleeves, Southern Nuclear letters dated August 23, 1996 and i

November 6, 1996, which is used to maintain a tube in service or

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return a tube to service. This includes the removal of plugs that were installed as a corrective or preventive measure.

i 10.

Preservice Inspection means an. inspection of the full length of l

each tube in_each steam generator performed by eddy current techniques prior to service to establish a baseline condition of

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the tubing. This inspection shall be performed after the field.

i hydrostatic test and prior to initial. POWER OPERATION using the j

equipment and techniques expected to be used during subsequent inservice inspections.

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i 11.

Tube Support Plate Plugging Limit is used for the disposition of a.

)

steam generator tube for continued service that is experiencing I

outside diameter stress corrosion cracking confined within the thickness of the tube support plates. These criteria are q

applicable for the Fourteenth operating cycle only. At tube support plate intersections, the repair limit is based on maintaining steam generator tube serviceability as described j

below:

a.

Degradation attributed to outside diameter stress corrosion

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cracking within the bounds of the tube support plate with

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bobbin voltage less than or equal to 2.0 volts will be allowed to remain in service.

b.

Degradation attributed to outside diameter stress corrosion cracking within the bounds of the tube support plate with a bobbin voltage greater than 2.0 volts will be repaired or plugged except as noted in 4.4.6.4.a.11.c below.

c.

Indications of potential degradation attributed to outside diameter stress corrosion cracking within the bounds of the tube support plate with a bobbin voltage greater than 2.0 volts but less than or equal to 5.6 volta may remain in service if a rotating pancake coil inspection does not detect degradation.

Indications of outside diameter stress corrosion cracking degradation with a bobbin voltage greater than 5.6 volts will be plugged or repaired.

FARLEY-UNIT 1 3/4 4-12a AMENDMENT NO.

,..,.. -., -.. -. ~ ~

. - - - ~ -. - -

- - - ~ - - _ ~. -.. - - ~. +. ~. ~, -

j i.

REACTOR COOLANT SYSTEM

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SURVEILLANCE REQUIREMENTS (Continued) l 6.

Pluqqing or Repair Limit means the imperfection depth at or beyond which the tube shall be repaired (i.e., sleeved) or j

removed from service by plugging and is greater than or equal to 40% of the nominal tube wall thickness. This definition does not apply for tubes that meet the F*/L*n-criteria.

For a tube that has been sleeved with a mechanical joint sleeve, through wall penetration of-greater j

than or_ equal to 31% of sleeve nominal wall thickness in the' i

sleeve requires the tube to be removed-from service by j

plugging..For a tube that has been sleeved with'a welded l-joint sleeve, through wall penetration greater than or equal 1

to 37% of sleeve nominal wall thickness in the sleeve j

between the weld joints requires the tube to be removed from j

service by plugging. This definition does not apply to tube j

i support plate intersections for which the voltage-based l

repair criteria are being applied.

Refer to 4.4.6.4.a.16' l

for the repair limit applicable' to these intersections. -For a tube with an' imperfection or flaw in the tubesheet below

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the lower joint of an installed elevated laser welded i

sleeve, no repair or plugging is required provided the j

installed sleeve meets all sleeved tube inspection i

requirements.

i j

7.

Unserviceable describes the condition of a. tube or sleeve if i

l' it leaks or contains a defect large enough to affect its structural integrity in the event of an Operating Basis

{.

Earthquake, a loss-of-coolant accident, or a steam line or l

feedwater;1ine break as specified in 4.4.6.3.c, above.

8.

Tube Inspection means an inspection of the steam generator tube from the point of entry.(hot leg side) completely

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around the U-bend to the top support of the cold leg.

For a tube with a tube' sheet _ sleeve installed, the point of entry i

is the bottom of the tube sheet sleeve below the lower i-sleeve joint.

For a tube that has been repaired by j

j sleeving, the tube inspection should include the sleeved portion of the tube.

i 9.

Tube Repair refers to mechanical sleeving, as described by i

Westinghouse report WCAP-lll78, Rev. 1, or laser welded sleeving as described by Westinghouse report WCAP-12672, or, i

for elevated sleeves, Southern' Nuclear letters dated August i

j 23, 1996 and November 6, 1996, which is used to maintain a j

tube in service or return a tube to service. This includes

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the removal of plugs that were installed as a corrective or preventive measure, f.

1:

j' a

i L* Criteria is applicable to Cycle 11 only.

4 1

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FARLEY-UNIT 2 3/4 4-12a AMENDMENT NO.

j 1,

s.

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REACTOR COOLANT SYSTEM SURVEILLANCE REQUIREMENTS (Continued) 15.

Tube Expansion is that portion of a tube which has been increased in diameter by a rolling process such that no j

crevice exists between the outside diameter of the tube and the hole in the tubesheet. Tube expansion also refers to that portion of a sleeve which has been increased in diameter by a rolling process such that no crevice exists between the outside diameter of the sleeve and the parent steam generator tube.

16.

Tube Support Plate Repair Limit is used for.the disposition of an alloy 600 steam generator tube for continued service 3

that is experiencing predominately axially oriented outside j

diameter stress corrosion cracking confined within the thickness of the tube support plates. ~At tube support plate intersections, the repair limit is based on maintaining steam generator tube serviceability as described belows i

a.

Steam generator tubes, whose degradation is attributed to outside diameter stress corrosion cracking within j

the bounds of the tube support plate with bobbin voltages less than or equal to the lower voltage repair 1 Lait (2.0 volts), will be allowed to remain in service.

j b.

Steam generator tubes, whose degradation is attributed to outside diameter stress corrosion cracking within the bounds of the tube support plate with a bobbin voltage greater than the lower voltage repair limit

[2.0 volts), will be repaired or plugged except as noted in 4.4.6.4.a.16.c below.

c.

Steam generator tubes, with indications of potential i

degradation attributed to outside diameter stress corrosion cracking within the bounds of the tube support plate with a bobbin voltage greater than the lower voltage repair limit [2.0 volts) but less than I

or equal to the upper voltage repair limit *, may remain in service if a rotating probe inspection does not detect degradation.

Steam generator tubes, with indications of outside diameter stress corrosion cracking degradation with a bobbin voltage greater than the upper voltage repair limit *, will be plugged or repaired.

The upper voltage repair limit is calculated according to the methodology in Generic Letter 95-05 as supplemented.

FARLEY-UNIT 2 3/4 4-13 AMENDMENT NO.

a i

1 I

.I Westinghouse letter NSD-JLH-6202, Summary of Farley LWS Lower Joint Development -

TM & C Qualification / Testing, dated June 25,1996

)

p28

. NSD-JLH-6202 l

l FROM: Steam Generator Design and Analysis WIN:

224 5689 DATE: June 25,1996

]

i

SUMMARY

OF FARLEY LWS LOWER JOINT DEVELOPMENT - TASK C QUALIFICATION TESTING i

To: G.Whiteman EC W M D.Kaniowski Cc: B.Nair L.Markle j

R. Gold s

i,

References:

1.14tter ALA 96-527,E, D.Kaniowski, to D.Morey, Southern Nuclear Operating Company, " Southern Nuclear Operating Company Joseph M.Farley Nuclear Plant Units 1 and 2 Elevated and Tube Mouth LWS lower Joint Development", 3/5/96 1

4 l

2. STD-QP 1996 7740 Rev. O, Farley Laser Welded Elevated Tubesheet Sleeve: Lower Hard Roll Qualineation Procedure, 5/96 4

1

3. Handout at Southern Nuclear Operating Company Westinghouse Meeting at Pittsburgh, L.A. Nelson, 3/16/96 4

I

4. Ietter NSD-JLH 6135, Summary of Farley LWS Lower Joint Development - Task C Scoping Testing, 4/30/96

5. WCAP-11178, J.M.Farley Units 1 and 2 Steam Generator Sleevmg Report < Mech==ir=1 Sleeves, 5/86 y

i 6.14tter, NSD-JLH 6209, Farley ETS Contact Pressures, A.Thurman, to L. Nelson, 1

6/26/96 4

l This letter summarizes the en=line= tion of the lower joint for sleeves elevated in the tuh==haat (ETSs) for Farley Unit 1. This task is shown in the Srst three references as Task C.

4

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Background:

l Reference 1 provided the technical description of a program to develop three mechamcal interference fit (MIF), two-roll pass, non welded sleeve lower joints. One of the MIF joints will be used for fulllength tubesheet sleeves (FLTSs) and two will be used with ETSs.

Both types of sleeves will be used in both units. The engineering part of this program is being performed in four tasks. (There is a separate part of this program, i.e., the i

licensing information such as the Safety Evaluation Chaelrliat, being performed by Regulatory and Licensing Initiatives { Nuclear Safety.})

i Task C, the subject of this communication, is being performed first and it addresses the i

1

1 4

l lower joint in Unit 1 for a tube which is undegraded in the joint area. (Degradation of a tube in the joint area is defined as tube ID corrosion at the elevation of the portion of the joint which provides the pullout and leakage resistance, i.e, the roll expansion.)

Development of the lower joint for this ETS.is based on selection of the "rglilapt" sleeve installation sequence. In this sequence, the sleeve-to-tube weld is performefbefore the lower joint roll expansion. Based on development of previous elevated joints for laser welded sleeves (LWSs), the " roll first" sequence was known to produce lower joints of greater tightness than those made by the reverse of this sequence, i.e., by the " roll last" sequence. The roll last sequence was selected because installation productivity for that sequence is higher than for the roll first sequence. In the rolllast sequence, the sleeve is immobilized by the weld earlier in the process, thereby facilitating some of the subsequent process steps. In the two-roll pass process selected for this design, the lower elevation pass is performed first, followed by the upper pass.

Reference 2, the procedure written for the qualineation test, specifies criteria for three types of tests for the lower joint,1) primary to-secondary leak resistanna testing, 2) secondary to-primary " onset of sigmficant leakage testing" (OSL) and 3) sleeve pullout testing. h purpose of the primary-to-secondary leak resistance testing is to determine the leakage for normal operation, ihr feedline break /stearniina break (FLB/SLB) and br a higher pressure which approximates the SG initial primary side hydrostatic pressure test.

b secondary-to-primary OSL test is performed to determine the sleeve-to tube interference fit radial contact pressure (CP). It involves the use of fluid pressure to determine the MIF, " metal to-metal" pressure, or simply, " metal" pressure, between the sleeve and tube. At the pressure level where the fluid pressure equals the metal pressure, and in the absence of mi-aine=at axial scratches or other axially linear degradation on the sleeve OD and/or on the tube ID in the roll expansion, ai-=ineant leakage will occur. b higher pressures used in this test are far higher than any pressures in the SG during any Techmcal Speci5 cation condition. b MIF pressure is multiplied by the area of contact of the sleeve with the tube and by the appropriate coefEcient of friction, based on pullout tests for this joint and on previous tests for the i

same materials, to provide the sleeve pullout resistance.

i Sleeve pullout testing is a direct determination of the resistance to pullout of the sleeve joint.

Design Aspects ofImrer Joint:

i For the sake of commonality, it is desirable that all three of the FLTS and ETS lower joints be of the same axiallength. On this premise, the effective axiallength of the joints would be determined by the axial space available in the vicinity of the tubemouth of Unit

1. (The effective l#ngth of a roll expanded joint is the' finished axiallength of the inner structure (for instance, sleeve) which is in high pressure contact with the outer structure

{for instance, tube). In this example the finished, rolled, inside surface or diameter (ID) of the sleeve will be essentially undarm throughout the effective length; the transitions from the expanded { rolled) to the unexpanded {non-rolled) portions of the sleeve are excluded.) brefore, the sleeve roll common effective length for the entire project would be essentially limited by the length of the tube partial depth roll expansion of Unit 1.

2

This is because a uniform sleeve ID will generally be unattainable if the effective length 4

t is partially placed in the factory rolled portion and partially in the explosive expanded (WEXTEX-ed", or simply WEXTEX) portion. The nominal axiallength of the Unit 1 tube factory roll expansion is 2.75 inches. However, pc.rt of that length was rolled to a small amount of thinning and part of that portion is also below the bottom face of the tubesheet

)

i and adds a smaller amount ofintegrity, compared to the hardrolled portion of the tube, j

to the sleeve-to-tube joint. Therefore, the actual effective length of the sleeve-to tube j

joint is limited to approximately 2.56 inches and 0.125 inch was subtracted from that to accommodate variability in the 2.75 inch nominal, tube factory roll, value. Therefore, the j

actual maxunum effective length of the sleeve joint is approximately 2.43 inches. Above j

the factory rolllength, the remainder of the tube within the tubesheet hole of Unit I was WEXTEX-ed. b tube wallin the roll portion is thinned several percent; the tube wall i

in b WEXTEX portion is thinned to a lesser extent. Similarly, the rolled portion was j

coldworked to a certain extent in the factory; the WEXTEX portion was coldworked to a lesser extent. Due to the diGerence between these two processes, and especially due to the differing resulting ids, it is good practice to avoid attempting to make a higher j

integrity MIF joint by locating it partly in both portions of the tube and that's why the sleeve joint will be located in the rolled portion.

h h elevated joints of both units are not limitad in axial effective length by being in two l

l different types of factory joints. In Unit 1, the elevated joint will be completely within the j

WEXTEX; in Unit 2, the elevated joint will be completely within the factory tube roll expanaian. brefore, although bre are implementation advantages of a common joint j

length, there were compelling reasons to make the elevated joints somewhat longer than j

h joints in b vicinity of the tubemouth. h effective length of the elevated joints is i

2.65 inches.

l Everything else being equal, it is expected that the integrity of the joint installed in a WEXTEX tube, the subject of this task, will be higher'than in a rolled tube. brefore, f

the mformance of b joint made in & WEXTEX tube is expected to bound the performance of the same joint made in a rolled tube and the rolllast, undegraded, factory l

rolled tube configuration was not scheduled for testing. (The "same" joint is defined as j

the joint made unmg the same roll expander, torque, roller rpm, roll pass sequence, j

effective length, as well as tube, tubenheet and sleeve material and strength parameters.)

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Primary Side Testing:

Rolled Joint Geometry and Torque:

l A larger amount of coldwork is required to minimina primary to-secondary leakage in this l

joint because of the lack of coldwork in the WEXTEX tube. b large amount of coldwork can be best accomplished with a high coldwork roller and a high torque.

Everything else being equal, a three pin rolling tool provides sigmficantly more coldwork i

per unit of torque than a four-pin tool 1

A roll expansion torque of 145 inch lbs was selected as the nominal value. This selection i

was based on the results of " scoping" testa documented in Ref. 4. W " nominal" torque is bounded by a range of +/ 10 inch lbs. This torque is applied to a three pin roll expander ~

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having an effective rolling length of 2.00 inches.

Two rolling passes were made with a roller overlap of 0.75 inch. The nominal rolled joint is made with the top of the upper roll pass positioned 2.65 inches above the top of the sleeve eddy current taper, thus producing i

an effective length of 2.65 inchea. This roll expander positioning lesves 0.60 inch of the i

roller extending below the sleeve eddy current taper during the initial roll pass. This i

rolled joint geometry is identified as "2.0/1.4-2.65" on the attached test data sheets.

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A small number of tests were made with rollers having an effective rolling length of 1.4 l

inches, and an overlap of 0.15 inch. Not a baseline geometry, leak test results for these joints, identified as "1.4/1.4 2.65", are listed for companson, but are not included in the data averages. Individual test samples were also made using a single pass with a 1.4 inch roller, two rolling passes at a 120 inch lb. roller torque setting, and an " embedded roller" condition producing a joint having an effective rolled height of 3.15 inches.14ak test results for these joints are listed for comparison, but are not included in the data j

averages.

j Primary to-Secondary Sido IAakage Testing:

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Twenty three pnmary-to-secondary side " process qualikation" leak tests were performed using a total of 19 test samples. Because the primary side testing tends to be non-j destructive of the samples, four of the test samples were rerolled at a higher torque, and

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leak tested a second time. All samples exhibited small amounts ofleakage.

IAak test results should be compared with the leak rate criteria value of 0.500 drops per minute per sleeve (dpm) specified in Ref. 2.'"

(There are approximately 75,000 drops in i

one gallon.)

The maximum leakage recorded at the primary-to-secondary differential l

pressure applicable to normal operation (1900 psi) was 0.100 dpm for the "nominaP l

tubesheet hole diameter (as compared with an overall average leak rate value of 0.045 i

dpm).

The maximum leakage recorded at the primary to secondary di5srential pressure l

applicable to normal operation (1900 psi)* was 0.160 dpm for the " maximum" tubesheet i

'" This leakage criterion is conservatively taken as a fraction of the leakage criterion j

proposed in Ref.1. The criterion proposed is an average of 1.22 dpm per sleeve, an arbitrary allocation of one-third of the 140 gallon per day (gpd) primary to-secondary Td*M Specifications limit, apportioned to 2,000 of these sleeves per SG. The 140 i

spd limit applies to the boundmg unit, Unit 1; the Unit 2 limit is 150 spd.

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• This pressure differentialis used as the normal operation (N.Op.) value; it is used in this room temperature test so that direct companoons (not shown bere) can be made.

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with data previously recorded at prototypical temperatures for the N.Op. condition for i

tubemouth joints. The 1900 psi primary side pressure resulted in the water being I

subcooled as it, entered the potential leak path between the sleeve and tube. In some l

previous testing, two-phase entering flows potentially caused inaccuracies. These i

potentialinaccuracies were avoided in this testing. Allleak testing was performed at j

room temperature. This has been determmed to be conservative, relative to prototypical, elevated temperatures, due to a lack of beneficial effects for joint integrity j

at room temperature. This effect is shown for the sleeve lower joints in Ref. 5, a joint i

which is very mi=dar to this joint.

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hole diameter (as compared with an overall average leak rate value of 0.056 dpm).

1 The following test geometries and torque values are well outside the tolerance band, but are presented as an indication of the overall effectiveness of the " baseline" joint. The low l

torque value of 120 inch lbs produced a leak rate of 0.062 dpm at 1900 pai. The short (2.15 inch roll height) setups produced leak rates of 0.056 and 0.042 dpm at 1900 psi.

The embedded (3.15 inch roll height) setup produced a leak rate of 0.094 dpm at 1900 pai.

i A single 1.4 inch roll pass produced a leak rate of 0.118 dpm at 1900 pai.

In the laboratory room temperature leakage testing, the most stringent location in the tubesheet, where the upward bending causes the most tubesheet hole dilation,0.65 inch i

l below the elevation of the sleeve joint top, was addressed. In this testing, the thermal i

growth mismatch contribution to increasing contact pressure and the decrease in contact pressure due to tubesheet bending loosening, in going from the as-installed condition to normal operation (N.Op.), were absent. The differential pressure tightening was present.

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Therefore, the test joint was approximately ( 788 - 895 = 107 psi) 107 psi"too tight".

i This is a non conservative effect. However, the 107 paiis a small fraction of the average i

as installed interference fit contact pressure, expected to approximate 5,000 pai, plus the i

788 psi N.Op. effects, for a total contact pressure of approximately 5,788 psi; the 107 psi is less than 2.0 percent of this value. brefore the effect on leak resistance would be negligible and no adjustmcat needs to be made in leakage prediction. (The as instaDod contact pressure, 5,000 pai,the average of all of the OSL testing, is shown in the appropriate section below.)

4 Contributions to Sleeve-to-Tube Contact Pressure l

for Companson of Laboratory Test Configuration with Plant Configuration 4

i Parameter

• Contact Pressure, psi Note Thermal growth mismatch

+921 Beneficial effect Differential pressure

+1033 i

tightening

?

l Tubesheet bow loosening

-1166 Detrimental effect i

Net Effect

+788

' tacataan in thW At===um-rotataos redine han bundle vertacal conterline, 0.66 inch below top of elem jeest.

3 See Reference 6.

i Ieakage Testing Conclusions i

i A torque of 145 +/ 10 inch lbs is suitable, based on minimization of primary-to-secondary leakage.

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Pullout Testing:

1 Pullout test results should be compared with the criteria of the larger of three times the i

maximum endcap load during normal operation, ( 3AP) or 1.43 times the endcap load durmg FLB/SLB. b larger of these two loads is usually the N.Op. case and for this l

summary, this load will be used for comparison with the test results. For this plant, the maximum N.Op. pressure differential is 1506 psi; therefore, the maximum endcap load i

durmg N.Op. is approximately 2,892 lbs. Six pullout test samples were fabricated, all at torque values of 145 inch.lbs. All of the four samples rolled at the 2.0/1.4 2.65 had pullout " breakaway" values between 3,850 and 4,150 lbs. force. The "short" sample rolled

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at 2.0/1.4 2.15 had a breakaway of 3,250 lbs. force, while the " embedded" sample rolled at i

j 2.0/1.4 3.15 had a breakaway of 4,150 lbs. force. All of these test values exceeded the criterion of approximately 2,892 lbs. bre is ample margm in this design, as determined j

by direct pullout testing, insofar as pullout resistance is concerned.

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I h testing was performed on sleeve / tube /tubesheet unit cells (collars) at ambient i

pressure and room temperature In the RT testing, all of the N.Op. effects, i.e., the +921 pai for thermal growth mismatch, the +1033 pai for differential pressure tightening. and the -1166 pai for tubesheet how loo 6ening, were absent. brefore, the test joint was "too loose" relative to the plant condition; this is a conservative effect. b joint would have j

more resistance to pullout in the plant than in the laboratory. Refer to the contact pressure table above.

Onnet of Sinni&=nt Imakage (Contact Pressure) Testing:

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Secondary Side Pressure Testing-1 i

Secondary Side leak testing does not prototype any operating condition, but is performed to determina, conservatively, the interfacial contact pressure between the rolled sleeve i

and the tube. bee results are then used to calculate sleeve rolled joint pullout forces.

i As the interfacial contact pressure of the rolled portion of the sleeve is approached, a min ih==t increase in leak rate will be observed. In this type of test, the leak test pressures are raised to exceed the onllapse pressure of the sleeve away from the roll expansion, collapse initiates and propagates to the rolled portion of the joint, resulting in i

premature failure of the joint. In order to remove this artifact of the test method and to measure the OSL, the current test uses a loose fittmg internal plus to reinforce the nieeve in the region away from the rolled joint. This prevents the interference of collapse with l

measurement of joint integrity. b summaries of the results are shown below.

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l h minimum interfacial contact pressure value is calculated on the basis of a coefficient of friction of 0.2, a typicallarge tube ID of 0.800 inch and the SAP value of 2,892 lbs l

(from above). The~resulting minimum allowable contact pressure value is approximately 2,171 pai. (The consideration of end effects on the sleeve portion in contact with the tube in the joint would increase the 2,171 poi slightly, reducing the ample margm slightly.)

i b test results are summanned below.

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Onset of Signi6 cant Leakage (Sleeve to-Tube Contact Pressure) l For i

Nominal Diameter Tubenheet Hole Sizes:

3 l

i Torque, inch lbs.

OSL, pai, Mimmum Note:

• =

)

l 135 All >5,000 i

145 One 4,000 & one >5,000

-Nomu torque case j

-4,000 psi case was out of l

range; with a short i

effective rolllength l

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l 155 All >5,000 i

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Onset of Signincant Imakage (Sleeve-to-Tube Contact Pressure)

For Maximum Diameter Tubesheet Hole Sizes:

i a

Torque, ineh Ibs.

OSL, pai, Minimum Note:

135 One >4,500, Two @ 5,500 145 One 4,000 & two @ >5,500 Nominal torque case l

155 All >5,000 I

All secondary side OSL test values exceed the limiting criterion value by a wide marsm.

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Conclusion on Contact Pressure Quali6 cation Test Results:

Adequate pullout resistance, with anequate margin, will be provided by this joint at the

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nominal torque,145 inch lbs and within the torque range of 135 through 155 inch lbs.

Y Conclusion on leakage and Contact Pressure Qualine= tion Test Results:

l The test results show that the "2.0/1.4 2.65" joint identi6ed above meets all design criteria. It is to be installed with the speci6c roll expander used in the quali6 cation and a l

roll torque value of 145 inch lbs. +/- 10 inch lbs.

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If you have any comments on this summary, please contact us ASAP.

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L.A. NELSON H.W.Y SG Design and Analysis SG Design and Analysis i

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SG Design and Analysis mnm 8

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%eendary Leak Petsery Rom idet Apper.WfT Technhyse Fores Bev.ter Ret Hl.

1910 pel 2850 pel 3110 pel 3110pel 4000 pel 4800pel 0000 poi $500 poi 6000 poi l

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least$se lusit$m lealt $se losic gen tonit $m lesit $m iseit dpm losit dpm lesit $m CeGar R.1 are 9 l

Tee 81614 9 0.7818 TdeHyd. 30114pel Simove 40017-7 3.2051 Str. Hyd. 19040 pel Steeve 40017-7 S.4238 80v. Ret 135h8 13 Simeve 4e017-7 4 Ages Sey. Reg 135 hs 2A 1.4tt.4 2.e5 0230 0.0 2 0A30 0.000 0.044 0.050 0 058 ost.

I Sisewe 40017-7 S.2914 Re Rc8 195 h8 1A Steeve 48017-7 4.9000 Re Rc5 195 kW 25 10ff.4-185 0.022 OD38 0.034 0 022 OD38 0.036 0.035 0.054 OSL i

Ceser R.1unt10 Tube 9453-48 0.0000 Tube Hyd. 30037 pel Sleeve 4e017-32 2.1980 Siv. Hyd. 18011 pel 80seve 40017-32 5.3143 Bev. Reg 135 hewei 15 Bloove 4e017-32 4.7985 80v.ReE 135h9use 2A 101.42A5 OD18

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Tde 8191 32 0.1783 TdeHyt 30035pel 81 move 40017 2 3.0013 SIv. Hyd. 1RHSpel Sleeve 48017 4 4DB18 Sev. Ret 120h8 15 Sessve 4E01720 3.8508 80v. roe 120k#

15 1.4ft.4 2A5 ODB2 0.000 0.005 0.118 0.178 0.744 OSL i

Sleeve 48017-20 5.0053 RefleE 145 h8 15 Sleeve 40017 3 44083 Re Re5 145 h5 2A 2.0fl.4 2A5 0.000 0.080 0.082 0A72 0.118 0.140 0.188 Da I

Ceter t.1 unk 12 Tube 8101 30 1A138 TeeHyd. 30330pel 81eeve 4E017-21 2A001 Str. Hyd. 19031 pel Sleeve 40017-21 4.7244 Spv. Rag 145 h5 15 Sleeve 40017-21 4.9932 Sev. Ret 145hs 25 2.0ft.4195 0 040 0.054 0.088 0.082 0.004 0 098

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Cater R.1unt13 i

Teo 8161 33 1 Ages Tde Hyd. 30400 poi i

Sleeve 48017-24 2.9840 80v. Hyd. 1905B pel I

Simove 40017-24 33148 Str. Rc5 145h8 1A Simove 40017-24 2.1883 Siv. Ret 145ks 2.5 2.0ft.4 2.15 0.088 0.082 ODF2 0.138 OSL

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Tee 73eNO 1.4313 Tee Hyd. 30051 pel Sleeve 40017-28 2.1907 Siv. Hyd. 19033 pel l

Siseve 40017-26 5.2989 80v. Ree 145 he use 1.5 Sleeve 48017-26 5.1383 Siv. Rc5 145 h 6use 25 2.0fl.42A5 0.030 0.024 ^

0.038 0.048 OD75 Pug Tear toestmeer -4150 s force l

l Cater R.1unt15 l

Tde 7385 31 0A351 Tube Hyd. 30005pel i

Steeve 40017-2B Sites 8Br. Hyd. 19041 pel Simove 40017 3B 8.2708 81v. Reg 135 hew 1A Siseve 40017-28 4.5545 Siv. Rc5 135 he w 2.5 2Dft.4 2.85 ODIS 0.048 0.050 0.000 0.000 0.082 0.000 OSL i

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1910pel 2880 pel 3110pel 3110 pel 4000 pel 4500 poi 5000 poi 5000 pol 8000 poi A w rsomme.

lease dpm inesc dpm insk:em immac dpm inesc gen insic dpm seest dpm ineseem inesc $m CeBar R 2 unR 9 Tube 73eHe 1.5400 TdeHyd. 30005pel Sleeve 40017 18 3.98D1 80v. Hyd. 1503 pel Simeve 48017-18 S.3105 est. Reg 135 h6 15 80seve 40017-18 6.3185 Sly.ReE 135 h8 22 1.4N.4 2A5 0 038 0.022 0232 0.030 0.000 0.050 0.054 OSL j

80seve 40017-18 S.7154 R M les 195h8 1A I

Sloove 48017-18 S.0005 RWteE 195 h8 22

2. Ort.4-2 85 0D30 0 040 0.042 0D38 0.000 0.054 0 000 0.134 OSL Cater R.2 wit 10 Tde 730833 OA795 Tube Hyd. 30000 pel Steeve 48017 19 5.4313 80v. Hyd. 19002pel Steeve 40017-19 4.1002 Sev.Rc8 14 h6 1A i

80seve 40017 19 4.3243 Sev.ReE 145 h6 2A 2.0ft.4 2.5 0.070 0.004 0.000 0.182 OSL N Teor tweetnemy-3650 8 force i

t Casar R.2 unt 11 Tde 73e N4 1 A353 ' TeeHyd. 30000 pel stoove 40017-22 3.8488 80v. Hyd. 18113pel i

Sleeve 40017-22 5.0037 80v.ReE 145 k# w 15 l

Sleeve 40017-22 4.5354 80v. Reg 145 hf w 2A

2. ort.4-3.15 0.004 0.118 0.118 0.150 0.232 N Tear tweshaser-4150 8 force i

Caser R.2 unt 12 N

Tde 73 ENS 0.4082 Tde Hyd. 3012T i

Sleeve 40017-23 4.W50 alv.Hyd. 1938 pel L

eloove 48017 23 1.08e5 81v. Reg 145 h6 15 80seve 40017-23 5.3BF2 ser.Ree 145 h6 22 11.4 - 1.4 U.110 0.102 0.104 0.104 0.182 0.248 OSL Sleeve 40017-23 5.2525 RMtet 145 h8 1A t

Simove 48017-23 5.3072 R M ted 145 h5 23 2.0ft.4 2.85 0.100 0.200 0.198 0.185 0.300 0.400 0.520 OSL Cesar R. 2 unt 13 r

Tube 73eHE 1.2123 TdeHyd. 30386pel Sleeve 48017-25 3A198 Siv. Hyd. 150FB yel r

Sleeve 40017-25 5.4094 Siv. Rag 145 hs 1A i

Sleeve de017-25 5.7540 Siv. Rc8 145 hs 2.2 1.4fl.4 2.15 0.042 0.042 0.000 0.080 0.000 0.078 0.112 OSL l

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Ceter k.2 unt 14 l

Tube 738544 1.8001 TubeHyd. 30204pel i

Simeve 4e01727 3.s383 Siv. Hyd. 19085 pel l

Steeve 40017-27 5.7181 Siv. Rc0 135 hf w 1A Sloove 48017-27 4.5213 Siv. Rc5 135 he w 23

2. ort.4-2.05 0.064 0.000 0.006 0.125 0.196 OSL l

Coeur k.2 ure 15 Tube 73eH5 0.4288 TubeHyd. 30005pel Sleeve 48017-2B 3.2010 Str. Hyd. 1903Bpas semove 40017-23 58217 elv. Ree 185 hf w 1A Steeve 48017-23 4.8300 Sev. Re5 155 n s w 22 2.0ft.4-2.85 OD34 0.038 0.038 0.044 0.058 0 006 0.074 OSL l

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1910pel 250pel 3110pel 3110 poi 4000pei 4500pel 5000 pet 5500 psi 8000 poi A w T m ean.

insic dpm immic dpm insecdpm issac dpm insic dpm iseac dpm insac dpm insscdem tesdcdpm j

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Ties 730848 0A2T7 TiteHyd. 300T3pel i

80seve 40017-31 4BN1 Str. Hyd. 1910Bysl asseve an017-31 sAsE2 av.sesE 14s h essa 1A SIsove 40017-31 4.7302 80.pleg 145 heun 15 1071.4 2.05 0.016 E022 0.0E0 0.000 0.0E0 Pie Tsar tuneemmer-40508 9erce j

Ceemr R. 2 modt 17 Tihe 94G 42 17129 Time Hyd. 30055 poi 80sewe 43017 34 2A001 Shr. Hyd. 1 5 00 pel 80seve 40017 34 S.1980 80v.fteE 195 k f uen 1A 80seve 40017-34 5.5118 80v.ptog 195 kseen 2A

2. ort.4 2.5 0.016 OA3D ODIS SABO 0.000 0.000 0 84.

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Ceest k.2 ure 18 Tihe 948345 1.0005 Time Hyd. 30022pel Sleeve 40017-35 19412 Str. Hyd. 18 5 5 psi l

80seve 4E017-35 5.13B3 Ser. fees 135heun 13 80seve 40017 35 4.8113 Elv.fteE 135 hseen 22 1071.44.05 OA3D 0.030 0A30 0.018 OA3D 0A30 0.000 OSL l

4ASF3 Aussess eE 1351riA 1Euus. Ola? 10ft.4 sses 0.0430 0A500 SONO EST10 OAIID 0A500 0.0000 4A105 Aessays e5145 h51Eust Ok'2. ort.4 seen OAF 94 0.0552 0.W52 R1NS 0.1715 0.2550 0.3100

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5.815B Aveseen eE 185 h51Aust. OIn'2. ort.4 seen OA357 OA330 R053D 0.0473 0.0853 0.0000 OA513 s

p 5.2517 Avenge sE10 set Din'2 Art.4 sets ROSSO O.0000 OAF 30 E00E0 0.1255 0.1220 0.1885 I

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Steam Generator Sleeving Integration Report, WCAPs 13115 and 13116 i

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