Text

Discusses Which Submitted Relief Request RR-ENG-2-8 Which Requested Relief from ASME Code Based on Provisions of Code Case N-491-2.Requests That Encl Be Placed Into PDR
	ML20207E896
Person / Time
Site:	South Texas
Issue date:	06/03/1999
From:	Alexion T; NRC (Affiliation Not Assigned)
To:	; NRC (Affiliation Not Assigned)
References
	TAC-MA5464, TAC-MA5465, NUDOCS 9906070194
	Download: ML20207E896 (48)
	v • d • e

{{#Wiki_filter:n, 1 J '4p June 3, 1999 MEMORANDUM TO: File FROM: Thomas W. Alexion, Project Manager, Section 1 ORIG. SIGNED BY Project Directorate IV & Decommissioning Division of Licensing Project Management

SUBJECT:

BACKGROUND INFORMATION PROVIDED BY THE LICENSEE IN SUPPORT OF RELIEF REQUEST RR-ENG-2-8 (TAC NOS. MA5464 l AND MA5465) By letter dated May 17,1999, the licensee submitted Relief Request RR-ENG-2-8, which requests' relief from the ASME Code based on the provisions of Code Case N-491-2..The NRC staff asked the licensee if it had done any comparisons between Code Cases N-491, N-491-1, , and N-491-2 that it would be willing to share with the staff. l The licensee indicated that it had and provided the attachment.DThe purpose of this memorandum is to place the attachment in the Public Document Room. . Docket Nos. 50-498 L and 50-499 i

Attachment:

' As stated bk 4 k' DISTRIBUTION: { and 50-499) i ((l00N f ~ DOCUMENT NAME: G:\\PDIV-1\\SouthTexas\\MEMA5464.WPD

To,.o.w.. coo r or m. ooeum.nundo = m m. = c. copy wro.ii.cnm.nv.ncio.u s. copy wan nii.cnm.nv.nclosur. N = No copy OFFICE PDly-1/p pE PDly.D/LA

'E / .TAlebd ICJamerson d/ NAME. DATE/ 6/b 6/T'/99 Jh OFFICIAL RECORD COPY; [ 4 99 P PDR . (. ~

g. 0

k. '

f ***oq,k UNITED STATES g g l NUCLEAR REGULATORY COMMISSION wAsnimorou, o.c. sness.coes June 3,1999 MEMORANDUM TO: File FROM: Thomas W. Alexion, Project Manager, Section 1 Project Directorate IV & Decommissioning Division of Licensing Project Management

SUBJECT:

BACKGROUND INFORMATION PROVIDED DY THE LICENSEE IN SUPPORT OF RELIEF REQUEST RR-ENG-2-8 (TAC NOS. MA5464 AND MA5465) > By letter dated May 17,1999, the licensee submitted Relief Request RR-ENG-2-8, which requests relief from the ASME Code based on the provisions of Code Case N-491-2. The NRC staff asked the licensee if it had done any comparisons between Code Cases N-491, N-491-1, and N-491-2 that it would be willing to share with the staff. The licensee indicated that it had and provided the attachment. The purpose of this memorandum is to place the attachment in the Public Document Room. Docket Nos. 50-498 and 50-499

Attachment:

As stated 1

SOUTH TEKAS PROJECT NUCLEAR OPERATING ~ COMPANY M!h wp. m NUCLEAR LICNNSING I i P. O. Box 189 (I 'ThI l ~ Wadsworth, Texas 77483 {'1g;pt fax 512G728298 ~ ~ ~ t r' n s m i-t t a 1 To: % QgmE i Fax #: %%g%he.c TFJ RPHOFE #/EX1N. -a-9n-g3n i Date: spy 9.3 Re: Q.n-E9s 7

Pages [ 2t

. including this cover sheet p ll NOTT:S: % zw l e coda e-es M-W/; n -v91- #,m a u-vst >. i t f Qs.ut_se A & e ac k w b o w circlerI. J l VERIFICATION # (512) 972-8124 ) Attachment

Ga An9tomme azn*cn s >- varR e , UOJFcalunho; o ] i l

SUMMARY

OF CHANGES BETWEEN CODE CASES N491, N491-1 AND N491-2 Paragraph -1220 Paragraph -1220 in N-491 references the requirements of IWF-5000. Paragraph -1220 in N-491-1 and N-491-2 references the Section XI edition ano addenda specified in the Owner's ISI program. - Paragraphs -3112.3 and -3122.3 These ho paragraphs were revised in N-491-2 to clarify that a support containing a relevant condition could be put into service (or b'ack into service) if it were found acceptable by evaluation or test. Also, these paragraphs in N-491-2 allow a support with a relevant condition found acceptable by evaluation or testing to be restored to the original design condition without performing the examinations specified by -2200. l i i -ee e.eww w. ,sgs, ggss, arrse,vt. m ?.e man.,s..iy.,m,

. a7-P1F5LTWG Ua %nmsMa aznaemwr vet e m o bMa>E N-491 CASES OF ASME 50!LER AND PRESStlRE VES$tL CODE Approvel Date: Moreh 14,1991 See knerieelh, des for angeneen and any reeWemehen deaes. ^ Case N.491 3000 STANDARDS FOR EXAMINATION Alderaative Roles for Pva-l== tion of Class 1,2,3, EVALUATIONS and MC Compemens Supports of Ught Water 3100 Evaluation of Examination Results Cooled Power Flames 3110 F.w/.se Examination Secties XI, Divialen 1 3111 Oeneral 8 -3112 A ~*'**ar* Inquoy: What alternative examination require. 3120 Inservice Examinations ments to those stated in Section XI, Division 1, Sub. 3121 General section IWF may be used when determining the com. -3122 A=; ance - ponent supports subject to examination and -3200 Supplementa1 Examinations establishing requirements for component supports? -3400 Acceptance Standards 3410 A~* **ar* Standards - Component Jhp&: It is the opinion of the Commines that the Support StructuralIntegrity folkyring alternative rules may be used for determin-TM ing component supports subject to examination and -2410 1 Inspection Program A for establishing examination requirements for Class 2410-2 Ir.spection Program B 1,2,3, and MC component supports under Subsec- -2500 1 Examination Chtegories , tion IWF, Section XI, DMsion 1. 1000 SCOPE AND RESPONSIBIIIIY TABIE OF CONIENTS 1100 SCOPE 1000 SCOPE AND RESPONSIBILITY -1100 Scope This Case provides alternative rules for inservice -1200 C-:--;-:==t Supports Subject to Exam-inspection of Class 1,2,3, and MC component sup-ination and Test ports. -1210 Examination Requirements 1220 Snubber f=i+=m Requirements 1230 Supports Exempt from Examination 1200 COMPONENT SUPPORTS SUBJECT 1300 Support Pnmination Boundaries TO EXAMINATION AND TEST 2000 EXAMINATION AND USPPON ' 1210 Examination Requiressents 2100 Scope The examination requirements shall apply to the 2200 Preservice Examinaten -2210 Initial Examination following: 2220 A-0 -st, Repair, and Replacement (a) piping supports; 2000 Inspecsion Schedule (b)su other than piping supports. -2410 Inspection Program 2420 Successive fa"* -1220 Snobberlaspection Requisements -2430 Nh 2500 Examination Pg--Lz ^ The inse:vice inspection requirements for snub- -2510 Si.yy.i. Selected for haination bers shall be in accordance with the requirements of -2520 Method of Examination IWF 5000. SUPP.10 - NC 834.1 -g-. e wee ,%-w, vs.,,,,

wwrwtu casseaue enertta,em o T-N-491: CASES OF A$ME BOE5t AND PRR$$URE VESSEL Coot ( E 1220 Suppens Esempt trem irma-I== ties - aqusted in accordance with 3000, repaired, or re-Component supports esempt from'the examination P requirements of 2000 are those connected to com-ponents and items exempted from examination under greater than 200'F during normal plant operation, IWB-1220, IWC 1220, IWD 1220, and IWP-1220. In the Owner shall perform an additional preservice ex-addition, portions of supports that are inaccessible amination on the affected component supports dur-by bemg encased in concrete, buried underground' ing or following the subsequent system heatup and or encapsulated by guard pipe are also exempt from cooldown cycle unless determined unnecessary by the examinadon requirements of M evaluation. This examination shall be performed dur-Ing operation or at the next refueling outage. ' 1200 SUPPORT EXAMINATION BOUNDARIES Support.exarnianham boundaries shall be in ac- -2400 INgPECTTON SCHEDULE cordance with IWF-1300. 2410 . Inspection Program (e) Inservice camminations shall be performed 2000 EXAMINATION AND either during normal system operation or plant out-INSFECTION ages. -2100 SCOPE III

**9
- ""' * *II * " "P ***

I in accordance with the i=aaa% zhedule provided The requirenants of this Case apply to the ex-in Table -24101 or Table -2410 2. amination and inspection of component supports, but (c) The inspection period specafled in (b) above not to the inservice test requirements of IWF-5000. may be decreased or extended by as much as one year to enable an inspection to coincide with a plant outage, within the limitations of IWA-2400. -2200 PRESERVICE EXAMINATION (d) Following completion of Frogram A after 40 2210 Initial halamb years, successive inspection intervals shall follow the 10 year laspection interval of Program B. (s) All examinations listed in Table 25001 shall be performed completeJy, once, as a preservice ex-2420 Sucesssive Inspections amination. Dese preservice exammations shall be extended to include 103 of all supports not ex-(e) De sequence of component support exami. - empted by -1230. nations established during the first inspection inter- -(b) Examinations for systems that operate at a val shall be repeated during each successive inspec-temperature greater than 200'F during normal plant tion interval, to the extent practical. operation shall be performed during or following in. (6) When a component support must be subjected itial system heatup and cooldown. Other examina-to conective measures in accordance with 3000, that tions may be performed prior to initial system heatup support shall be reexamined during the next inspec-andsec,14-m tion period listed in the inspection schedules of the inspection programs of 2410. 2220 A@ssement, Repair, and Replacement I#l

- "d required during the next inspecten period as a result (e) Prior to return of the system to service, the of the examinations required by (b) above, the in-applicable examinations listed in Table 25001 shall -

spection schedule may reven to the requirements of ber4vi.ed on component supports that have been (a) above. supp.So - nc SM.2 Em ~+,W.*

ve"""'*

~ ' " " ' + * * * - q

Gih7-FM-bi) &GJ (759Ef;CTDMKdK9 bETMET500 v. W N-491 CAsss or Asur solLER AND PREssUn1VBasEL CODE -2430 Additional Examinations (a) When component supports must be subjected to corrective measures in accordance with 3000, the component supports immediately a4acent to those { TABLE 2410-1 for which corrective salon is required shall be as-INSPECTION PROGRAM A amined. Also, the czaminations shallbe extended to include additional supports within the system, equal yp,,, in number and of the same type and function as those M I scheduled for avaminatian during the inspection po-Cann sent % Crestet % e inwrvat. Piant savlee riod. 1st 3 too loc (6) Wnen corrective measures in accordance with -3000 are required as a result of the additional ex-i and ss 67 aminations, the remaining component supports with- ,p, in the system of the same type and function as in (a) above shall bc==inedc s,d is to y 17 4e so (c)(1) When corrective measures in accordance E to 66 7s with 3000 are required as a result of the additional 88 18' 1'8 examinations in (b) above, examinations shan be ex-tended to include all nonexempt supports potential $ 3, subject to the same failure modes that required cor-n as y rective measures in accordance with (a) and (b) 33 so 67 37 ts too above. (2) These additional exam *mations shall include 1# nonexempt component supports in other systems when support failures requiring corrective measures indicate non system-related support faGure modes. (d) When corrective measures are required by (c) aW the her shan exambe ease emany e TABLE -2410-2 Ponent supports that could be asected by the same INSPECTION PROGRAM 8 observed failure modes and could affect nonexempt canPonents. ineo.csi.e Pertes I Calendar Years of Plant swviet Minimwn Manwnum inspection Wimin the ~ Examinations Eneminations 2500 EXAMINATION REQUIREMENTS laterval Inweval Complets4 % Credhs4 % The fonowing shall be examined in accordance 1st 3 16 M with Table 2500-1. (8) mechanical connections to pressure retaining 7 s0 67 I' 188 1" components and building structure; (6) weld connections to building structure; se 3 3, 3 (c) weld and mechanical connections at intermo-7 m 67 10 too 100 diate joints in multiconnected integral and noninto-gral supports; (d) clearances of guides and stops, alignment of supports, and assembly of support items; (c) hot or cold settings of spring supports and con-E stant load supports; (/) accessible sliding sudaces. supP. to - NC SHJ E r. v.--** o-anc es,. m w w =-(.w +p em ww=,, a w s-..orm r,*. . +, ~ - -

N-491 CASES OF ASME BOILER AND PRES $URE VESSEL CODE ( j llll till ij s!!! 1111 iji } -t a i t I' !!!! lf!!]I = g l s!!! }. } ll l }] ::::e : il lj lg 1l1gj g j g s I isis "W -}i J g !g 1111 }{fa 2 .l:11l I i IfIl fle iiii 118 i i t-li,II 2 !.alal R jIgr [t l-lllsils il } ! I] 1 1 'IE i I i i i lII. P it d!h i 3, Is s s e e e c j . - ne

( M MfWu. N-491 cases OF AsME DoILER AND PRESSURE VEssEt, CODE 2510 Supports Selected for han=I==da= (2) improper hot or cold settings of spring sup-ports and constant load supports; Component and piping suppotts shall be examined l#l "I'*U8""*** 'I '"M in accordance with Table -25001. %.ent sup-ports to be examined,shall be the suppons of those and components that are required to be examined under . (6) repair in accordance with IWA-4000 and reex-IWB 2500, IWC 2500, IWD.2500, and IWE-2500 by amination in accordance with -2200; volumetric, surface, or visual (VI'-1 or VT 3) exam-(c) replacement in accordance with IWA 7000 and laation -M Pipmg supports to be===ined reexamination in accordance with -2200. shall be the supposts of piping not exempted under c ,m y IWB 1220, IWC 1220, IWD-1220, and !WE-1220. 3112.3 Acceptance by Evaluation er Test. As an alternative to the requirement of -3112.2, a compo-nent support that is unacceptable for service may bc ,g gg g,,,,% analyzed or tested to the extent necessary to sub- 'Ibe methods of examination shall comply with stantiate its integrity for its intended service. Records i those in Table -2500-1. Alternative methods of ex-and reports shall meet the requirements of IWA-amination meeting the requirements of IWA2240 6000. may be used. 3120 Inservke hamlastions -3000 STANDARDS FOR EXAMINATION EVALUATIONS 3121 General Inservice nondestructive examina-E tions performed during or at the end of successive 4 100 EVALUATION OF EXAMINATION inspection intervals to meet the requirements of Ta-RESUI.T8 ble 2500-1 and conducted in accordance with the 4 110 Preservice Rwa =Ima*Eama. procedures of IWA 2200 shall be evaluated by com-paring the results of examinations with the accept-4111 General The ps.Js examinations per-ance standards specified in 3400. formed to meet the requirements of -2200 shad be evaluated by comparing the an=%ation results with 3122 Acceptance acceptance standards speci5cd in 3400. 3122.1 Acceptance by Examination. Component E -3112 Acceptance supports whose examinations do not reveal condi. 4112.1 W--ee by Examination. Component tions described in 4410(a).shall be acceptable for supports whose examinations do not reveal condi-continued service. Verified changes or conditions tions described in -3410(a) shall be acceptable for from prior examinations shall be recorded in accord-ance with IWA 6220. service-4112.2 Acceptance by Cemetion. Cvent 4122.2 Acceptance by Correction. Component. E supports whose examinations reveal conditions de-supports whose examinations reveal conditions de-scribed in -3410(a) shaU be unacceptable for service scribed in 4410(a) shall be unacceptable for conti-until such conditions are corrected by one or more nued service until such conditions are corrected by of the following: one or more of the fo!!owing: (a) a4ustment and reexamination in accordance (a) adjustment and reexamination in accordance with -2200 for conditions such as with-2200 for conditions such as (1) detached or loosened mechanical conneo-(1) detached or loosened mechanical connec-tions; tions; SUPP.10 - NC 834.5 -w %..a m p.e-

pag. %we-ar

.m.g..+..eid>=amm "~

h M +1J h J A m (7JLA%%RWdRD N ~, t,Aact (continuec) N-491-casas OF ASME 808tER AND PRES $1RS VESSEL CODE ( _'(2) improper hot or cold settings of spring sup. 3400 ACCEPTANCE STANDARDS v (3 m

or g

g gy . (4) improper displacement settings of guides and stops. ~ (s) Component suppon conditions which are un- ~ 6) repair in accordance with IWA-4000 and recz-acceptable for continued service shall include the fol-( amination in accordancewith -2200; lowing: (c).. _ tin accordancewithIWA-7000 and (1) deformations or structural degradations of reexamination in accordance with.2200. . fasteners, springs, clamps, or other support items; -E' 3122.3 Acceptance by Evaluatio'n or () 88

- - *. W nc NPPon g'

alternative to the requirement of -3122.2, a compo-

- t WPP0" W Poh d a component appen J) arc strikes, weld splatter, paint, scoring, which is unacceptable for contm, ued service may be -

roughness, or general corrosion on close tolerance analysed and/or tested to the extent necessary to sub-machined or sliding surfaces'- stantiate its lategrity for its intended service. Records (d) Improper hot or cold settings of sprm.ssup- ' E an reports shall meet the requirements of IWA-P (y g,,g,,,,g,p res; (d) improper clearances of guides and stops. (6) Except as defined in (a) above, the following are exampics of non-relevant conditions: E 3200 - SUPPLEMENTAL EXAMINA110NS. II)I* (*'8 fr m Peching, lay-out, bending, rolling, and machining); Examinations that detect conditions that require (2) chipped or discolored paint; evaluation in accordance with the requirements of (J) weld splatter on other than close tolerance -3100 may be supplemented by other examiantian machined or sliding surfaces; teethods and techniques (IWA-2000) to determine (#) scratches and surface abrasion marks; the character of the flaw (i.e., size, shape, and ori- , (5) roughness or general corrosion which does entation). Visual examinations' that detect surface not reduce the load bearing capacity of the support; flaws that exceed -3400 criteria shall be supplement-(6) general conditions acceptable by the mate-ed by either surface or volumetric examinations. rial, Design, or Construction Specifications. 4 e,. se - c. 834.6 ._..m.,_._,_.. _. _. _.. _ ~..

CASE (, It ' N-491-1 CASES OF ASME DOILER AND P5SSSURE VESSEL CODE . Approval Date: April 30,1993 See Nwneneet ksdex Apr espireden and any memotion dem. Case N 4911 -1000 SCOPE AND RESPONSIBILITY Alternative Rules for h=I=eks of Oass 1,2,3, and MC Component Supports ofIJaht Water 1100 SCOPE Cooled Power Plaats This Case provides alternative rules for inservice 8*88888 XI. Di'i83** 1 inspection of Oass 1,2,3, and MC component sup-ports. 1200 COMPONENT SUPPORTS SUBJECT f4,y: What alternative examination require. ANN AND N ments to those stated in Section XI, Division 1, Sub-section IWF may be used when determining the com-1210 Examination Requirements Ponent supports subject to examination and The examination requirements shall apply to the establishing requirements for component supports?. g,gg (a) piping supports; (b) suppons other than piping supports. Jteply: It is the opinion of the Committee that the 1220 Snubber Inspection Requirements following alternative rules may be used for determin-ing component supports subject to examination and The inse vice inspection requirements for snub-for establishing examination requirements for Oass bers shall be in accordance with the Section XI Edi-1,2,3, and MC component supports under Subsec. tion and Addenda specified in the Owner's Inservice tion IWF, Section XI, Division 1. Inspection Program. TABLE OF CONTENTS ] -1000 SCOPE AND RESPONSIBILITY -3000 STANDARDS FOR EXAMINATION 1100 Scope EVALUATIONS -1200 Component Supports Subject to Exam-3100 Evaluation of Examination Resulu ination and Test 3110 Preservice Examination ~ 1210 Examination Requirements -3111 General j -1220 SnubberInspection Requirements -3112 Acceptance --1230 Supports Exempt from Pmamination -3120 Intervice hminations -1300 Support Examination Boundaries 3121 General 4 -2000 EXAMINATION AND INSPECTION -3122 Acceptance 3200 Supplemental Framinations -2100 Scope -220 Preservice hamiaanan 3400 Acceptance Standards -2210 Initial hmination 3410 Avec Standards - Component .** - Repair, and ReN= =Et Support StructuralIntegrity -2220 Inspection Schedule 2400 -2410 Inspection Program 3420 Successive Inspections 2430 Additional Examinations TABLES -2500 h=In=tian Requirements 2410 1 T'=l=*3aa Program A 2510 Supports Selected for h=ianeian 2410 2 f% Program B -2520, Method af Examination 25001 hminahan Categgrigg 913 r _.. _ _ _._.~ _

L .N N " CASE (continued) '~ - N-491-1 cases or AsME son.sa AND PREsstJRE Vx8SeL CODE 1230 Supports Esempt from Examination adjusted in accordance with 3000, repaired, or re-P Component supports exempt from the examination requirements of -2000 are those connected to com-greater than 200'F during normal plant operation, ponents and items exempted from examination under the Owner shall perform an additional preservice ex-IWB-1220, IWC 1220, IWD-1220, and IWF-1220. In aminadon on the M wrt suppe duo ' addition, portions of supports that are inaccessible ing a follom,ng the subsequent system bestup and by being encased in concrete, buried underground, cooldown cycle unless determined unnecessary by or encapsulated by guard pipe are also exempt from evaluat

- tan Sh*H c Pedormed dw-the examination requirements of-2000.

Ing operation or at the next refueling outage. -1300 SUPPORT EXAMINATION DOUNDARIES j Support==ina'taa boundaries shall be in ac- -2400 INSPECTION SCHEDUIK cordance with IWF 1300. -2410 Inspectica Program (a) Inservice examinations shall be performed -2000 EXAMINATION AND either during normal system operation or plant out-INSPECTION ages. (6) The required examinations shall be completed -2100 M PE in accordance with the M;+4= schedule provided ne requirements of this Case apply to the ex-in Table 24101 or Table -2410-2. amination and inspection of component supports, but (c) The inspection period specified in (b) above not to the inservice test requirements of IWF-5000. may be decreased or extended by as much as one year to enable an inspection to coincide with a plant outage, within the limitations of IWA-2400. 2200' FRESERVICE EXAMINATION (4) Following completion of Program A after 40 years, successive inspection intervals shall follow the 2210 Initial R===I=ation 10 year inspection interval of Program B. (s) All examinations listed in Table -2500-1 shall , be perfbrmed completely, once, as a preservice ex-2420 Successive Inspections ammation. These preservice examinations shall be extended to include 100% of all supports not ex-(s) The sequence of component support exami-empted by -1230. nations established during the first inspection inter-l (b) Framinations for systems that operate at a. val shall be repeated during each successive inspoo-temperature greater than 200'F during normal plant tion interval, to the extent practical. operation shall be performed during or following in-(6) When a component support must be subjected itial system heatup and cooldown. Other==ina-to corrective measures in accordance with -3000, that tions may be performed prior to initial system heatup support shall be r "-d during the next inspeo-and cooldown. tion period listed in the inspection schedules of the inspection programs of-2410. (c) When additional corrective measures are not -2220 W Repair, and R@ cement required during the next inspection period as a result (s) Prior to return of the system to service, the of the -minations required by (b) above, the in-applicable examinations listed in Table -25001 shall spection schedule may revert to the requirements of be performed on component supports that have been (a) above. 914 .L . ~ ~

6 N ~ [4 CASE (oondnued) N-491-1 Ca:Es OF AsME BoEJR aND FNtssUsE VESSEL CODE 2430 Addideaa! Ewa=n8=a*Aame (a) When component supports must be subjected to corrective measures in accordance with -3000, the component supports immediately a4acent to thoes TABLE 2410-1 for which corrective action is m.J. 4 shau be ex-INSPECTION PROGRAM A amined. Also, the camminations shan be **w to include additional supports within the system, equal . Inessem pened, Minismm Mais""* in number and of the same type and function as those d E" "" scheduled for aramination during the inspection po-c riod. la 3 too too (6) When corrective measures in accordance with 3000 are required as a result of the additional ex-ans 7 ss 6' aminations, the remaining component supports with-to an 1" in the system of the same type and function as in (a) above shall be examined. sed is 16 3 17-so so (c)(1) When corrective measures in accordance to 66 7s .with 3000 are required as a result of the additional as too too araminations in (b) above, examinations shan be as-tended to include all nonczempt supports potentiaHy 3, so as 34 subject to the same faHure modes that required cor- 'ss so 67 rective measures in accordange with (a) and (b) 37 7s too abows. de loo (2) These additional aramina'iane shall include nonexempt component supports in other systems when support failures requiring corrective measures indicate non-system-related support failure modos. (d) When corrective measures are required by (c) above, the Owner shall examine those exempt com-INSP N OG MB Ponent suppons that could k abod by &c same observed failure modes and could affect nonexampt I components. Calendar Years of Plant Service Minimum Maaknum leapsedan Wieda ee' Examina0 ens Esamhedens -2500 EXAMINATION REQUIREME!G1 Insenal laterval completed, % credited, % The following shan be examined in accordance 1st 3 16 M with Table -25001. 7 so 67 (8) mechanical connections to pressure retaining to tw too components and building structure; g% 3 g, p (b) wc!d connections to bunding structure; n 67 (c) weld and mechanical connections at intermo-to too too diate joints in multioonnected integral and noninte-gral supports; (d) clearances of guides and stops, alignment of supports, and assembly of support items; (e) bot or cold settings of spring supports and con-stant load supports; (f) accessible sliding surfaces. 915 I

wMRIJhj~%Mb e earwnras vazrm ~ [- CASE (continued) N-491-1 CASES OF ASME BOILER AND FRESSURE VESSEL CODE I 1111 1 lill as } 3!!! ~ 1111 i 15==*'I !p< ! i ug s i Iggt g jl3i 8 j

Ni}l l

All p1W l y = !3 -= f $! l.gj **fi i] 1tl 1 w w

os s E

BBBB u }<

g

.}g g B ! till l}la .h'>{I I f i}I b lisi l1' 18,Iji iiii ili] 1 igiall e ilt,}! Ej k' l l 1 !. IijlE l-1iiih 1 I iii}II Ph !!}ik{I tt a , e, e c p e iseas 916

, w#r3P&u/~wML essn5WLee a r cu rera s~ v.w x o .,L-CASE (continued) N-491-1 Cams of AsME Bon.ER AND PRESSURE VESSEL CODE -2519 Supports h'for Examinatism (2) improper hot or cold settings of spring sup-Omnponcat and piping supports shall be==laed Pwts and constant load supporm; in menordanos with Table -25001. Component sup. (J) mWignment M suppma; a ports to be examined shall be the supports of those )if Pmpw displacement sonings d guides ""d **P components that are required to be examined under IWB 2500, IWC 2500, IWD-2500, and IWE 2500 by @ repair in accadance u.m IWAm and reen-I" *""d'"" "I* ~#' vohunstric, surface, or visual (VT-1 or VT 3) exam-(c) F8P acement in accordance with IWA-7000 and l Wmh m be exa g reexarn tion m accordance th 2200. shau be the supports of piping not esempted & IWB-1220, IWC 1220, !WD 1220, and IWE-1220. -3112.3 Acceptance by Imaties orTest. As alternative to the requirement of 3112.2, a compo. A881 WPpwt that is u=~pble h ses snay be 2530 Method of hamina86a= analyzed or tested to the extent necessary to sub. The methods of examination shall comply with stantiate its integrity for its intended service. Records those in Table 25001. Alternative methods of ex-and reports shall meet the requirements of IWA-amination meeting the requirements of IWA 2240 6000. may be used. 3000 STANDARDS FOR 4 120 Inservice haminations EXAMINATION EVALUATIONS 3121 General. Inservice nondemwve mmian-4 100 EVALUAT10N OF EXAMINATION tions performed 'during or at the est :1 successive RESUITS in8Pection intervals to meet the requi.euits of Ta-ble 2500-1 and conducted in accordance with the 4 110 Preservice hamtmations procedures of IWA-2200 shall be evaluated by com- ' 4111 General. The preservice examinations per-Paring the results of examinations with the accept-fonned to meet the requirements of -2200 shall be ance standards specified in M. evaluated by comparing the examination results with 3122 Acceptance 8888Ptance standards W h -M -3122.1 Acceptance by haminattan C+5+Eent 4112 Acceptance supports whose examinations do not reveal condi-4112.1 Acceptance by Pa=Imation. Component tions described in M10(a) shall be --y#* for ' supports whose examinations do not reveal condi-continued service. Verified changes or conditions tions described in M10(a) shall be acceptable for from prior examinations shall be recorded in accord- ) service. ance with IWA-6220. l ~ 4112.2 Acceptance by Correction. Component 3112.2 Acceptance by Correction. Component supports whose==inations reveal conditions de. supports whose mminations reveal conditions de-serbed in M10(a) shall be unacceptable for service scribed in 4410(a) shall be un=~yable for conti-untu such conditions are corrected by one or more nued service until such conditions are corrected by of tbs fouoming: one or more of the following-(a) a4ssement and reexamination in accordance (a) adjustment and reexamination in accordance . with -2200 lbr conditions such as with -2200 for conditions such as - (1) detached or loosened mechanical connee. (1) detached or loosened mechanical connec-tions; tions; 917 v l

WMARh#~W@J RiewrtgLeans ~ ? CASE (continued) N 491-1. casas or AnsE notum AND FRE88URE VESSEL C048 (2) improper hot or cold settings of spring sup- -3400 ACCEFTANCE STANDARDS Ports ud constant load supports; -341e Acceptanee standeds - Compement i (J) misaligmnent of supports; or 88PPort StructuralIntegrity (4) haproper displacement settings of guides and stops. (e) Component support conditions which are un-(6) repair in accordance with IWA 4000 and roez-acceptable for continued service shall include the fol-

==In=*ian in accordancewith 2200; lowing:- (c) @ ztin accordancewithIWA 7000and (l) defonnations or structural degradations of r accor -2200. fasteners, springs, clamps, or other support items; ) g, d W, w h ad W ^--- 7 by Evaluation er Test. As an 3 3122J F alte

6e t d 3M a canPO-(3) are strikes, weld splatter, paint, scoring, sont suppen w W W a canponent appwt roughness, or general corrosion on close tolerance which is unacceptable for continued service may be W

lidi v u % t--W and/or tested to the extent necessary to sub-(4) Improper hw w dd W d sW g stantiate its integrity for its intended service. Records pets constant appats reports shall meet the requirements of IWA-(, p_ g (d) improper clearances of guides and stops. (6) Except as defined in (a) above, the following are exarnples of non-relevant conditions: . (1) fabrication marks (e.g.; from punching, lay-3200-SUPPLEMENTAL EXAMINATIONS out, bending, rolling, and==^=, =-); Pr==Instians that detect conditions that require (2) chipped or dieratared paint; evaluation in accordance with the requirements of (J) weld splatter on other than close tolerance 3100 may be supplemented by other awamination machined or sliding surfaces; methods and techniques (IWA-2000) to determine (4) scratches and surface abrasion marks; the character of the flaw (Le., sire', shape, and ori-(5) roughness or general corrosion which does estation). Visual ara =Instions that detect surface not reduce the load bearing capacity of the support; Saws that exceed 3400 criteria shall be supplement.- (6) general conditions acceptable by the mate-ed by either surface or volumetric ernminations. rial, Design, or Construction Specifications. 1 918 t I

h;E-tLPtherJ~W70PJ iga 9%DSINL%91WJ h l. N-491-2 CAS8$ OF ASME BOILER AND PRESSURE VESSEL CODE Approwel Date: Marsh 12, 1997 See Numeric Index tier espiraden and any reetfirmadon detes. Case N 491-2 Alternative Rales Ear Rwa =4eelan of Ones 1,2, 3, and MC C, - - t Supports of Ught Wate-Cooled Power Plants - Secties XI, Division 1 Inquiry: What alternative examinadon requirernents to those stated in Section XI, Division 1, Subsection IWF may be used when deternuning the ergi-:-nent supports subject to exanunation and establishing re-quirements for component supports? Reply: It is the opinion of the Comminee that the i following ahernative rules may be used for deternun-ing - ;== supports subject to ernmination and ) for establishing exammation requirements for Qass 1, i 2, 3, and MC (+-.-:=^ supports under Subsection IWF Section XL Division 1. i I \\ 667

c w w&ar,mse aawnswsaw en-muurwnwm 1 l CASE (continued) N-491-2 1 l CASES OF ASME BOILER AND PRESSUaE VESSEL CODE CONTENTS 1 1 1 -1000 Scope and ar; " '"ty............................................... 671 1100 Scope................................................................... 671 l -1200 Cosmponent Supports Subject to Fn- =etion and Test................. 671 1210 Fr aminadon Requirements............................................... 671 1220 Snubber Inspection Raquirements......................................... 671 -1230 Supports Exempt fkom Fnmination...................................... 671 l -1300 Suppott Examination Boundaries................. 671 -2000 F===l==8 Ea= and Inspecties............................................ 671 -2100 Scope................................................................... 671 -2200 Prese:vice Rwa =lantica................................................. 671 -2210 Initial Exauunenco...................................................... 671 -2220 Adjustment. Repair. and Replacement..................................... 671 -2400 Inspection Saadale.................................................... 671 -2410 Inspection Program...................................................... 671 -2420 Successive Inspections................................................... 671 2430 Additional Krammations................................................. 672 2500 Examination Requirements............................................. 672 -2510 Supports Selected for 9== =%....................................... 672 2520 Method of Fr amination.................................................. 674 -3000 Standards for Exandnation Evaluations................................. 674 3100 Evaluation of S==i==% Results....................................... 674 -3110 Preservice Framinations................................................. 674 3111 General................................................................. 674 -3112 Ac=t===.............................................................. 674 3112.1 Acq==== by Examination.............................................. 674 -3112.2 Ac=;=+ +- by Correction................................................ 674 -3112.3 Acc+,==== by Evaluation or Test........................................ 674 i l -3120 Inservice F = =mi==r===.................................................. 674 -3121 General................................................................. 674 -3122 A=;===............................................................. 674 -3122.1 AE+/ : E by F ramination.............................................. 674 -3122.2 A = -f -- = by Correction................................................ 674 -3122.3 A e ;==== by Evaluation or Test........................................ 674 l l 4 300 Supplemental Exandnations............................................. 675 l -3400 A--*--~ Standards.................................................. 675 l 3410 A e -,-== Standarth --{+=i-:=^ Support Structural Integrity............. 675 i N l ~. - - - - _ _ - ~ _. - _,. _ - _. _ _

GX&=rJP%eT~&T*'8s 9JL992AZLQtLa9AGRD h%Cf4 MsE % v M CASE (continued) N-491-2 CASES OF ASMS DOELER APW PRE 85URE VESSEL CODE Tables 24101 Inspecdon Prograta A................................................... s t'd -2410 2 Inspection Prograin B................................................... 672 -2500 1 Fu ami nation N%................................................. 673 \\ 670

, EM-tD&dT WG8 NLKIELWMs envIWser mere CA0E (continued) N-491-2 cases or AsME nosuen AND PnBeSUnE VEssEE. CODE -1000 SCOPE AND RESPONSIBILITY tion. These preservice examinations shall be estandad to include 100% of all supports not exempted by -1230. -1100 SCOPE (b) Ena=laations for systems that operate at a teinper-his Case provides alternative rules for inservice atuse greater than 200*F during normal plant operadon laspeedon of Class 1,2,3. and MC -P supports. shall be performed during or following initial system heamp and cooldown. Other n==laations may be per-formed prior to inidal system heatup and cooldown. -1200 COMPONENT SUPPORTS SUBJECT TO EXAMINATION AND TEST 2220 A4ustasent, Repair, and

5-t

-1210 Eannimation Requiremsans (a) Prior to return of the system to service, the

PP cable er====hons listed in Table 25001 shall li h -i-nM shan gly a te be perfonned on component suppens that have been fonowing.

aqusted in accordance with 4000, repaved, or replaced. I* (6) For systems that operate at a temperature grosser 6 than 200*F during normal plant operanon, the Owoor 1220 Smibber Inspecdon Wu Shau perform an addidonal g4 exanunanon on abe affected - --; - supports during or following The inservice inspection requiremems for snubbers the subsequent system heatup and cooldown cycle unless shall be in accordance with the Section XI Edidon and duermined unnecessary by evaluadon. This examination Addenda speci6ed in the Owner's Inservice Inspection shall be performed during operadon or at the next Program. refueling outage. -1230 Supporu Ensept from Examinosien t' ar suppens exempt from the =*=aaaaa 2400 INSPECTION SCHEDULE sequineems of -2000 ase those canaaramat to compo-noms and leems exempted fuesa=====atian under -2410 Inspection Program IWB 1220, IWC 1220, IWD-1220, and IWE-1220. In (a) Inservice n==Inariana shall be performed either addition, ponions of suppens that are inaccessible by during normal system operation or plant outages. being escased in concrete, buried underground, or en-(6) De required ev==matiane shall be completed in capsulated by guard pipe are also exempt from the accordance with the inspecnon schedule provided in examination seguirements of -2000. Table 2410-1 or Table -2410-2. (c) The inspeedon period specified in (b) above unay i be dec2 sed or extended by as much as one year io -1300 SUPPORT EKAMINADON enable an inspeedon to coincide with a plant outage, BOUNDARIES within the limitations of IWA 2400. Support===inastaa boundaries shall be in accond-(d) Pouowing completion of Program A after 40 anos whh IWF-1300, years, successive inspection maarvals shall follow the 10 year inspection interval of Program B. -2000 EXAMINATION AND INSFECTION 2420 Secesssive Inspections 2100' SCOPE (a) The sequence of component support ern=Innhons The requisements of this case apply to the examina-established durmg the first inspection imerval shall be tion and inspecmon of component supports, but not to 88Peeted dunng each successive inspeedon interval, to the extent a*=~'a=1 the laservice test requnements of IWF-5000. (6) When a component support must be subjected i to conective measures in accordance with -3000, that -2200 PRESERVICE EXAMINADON support shall be rana =iaart durmg the next inspection Pened hstadin &cinspeedon MW6einsA -2214 InisialIr = =Imass programs of -2410. (a) All===iaas'a== lissed in Table 25001 shall (c) When addedanat corrective measmes are not to-be perfonned completely, once, as a pseservice examian-quired during the next inspection period as a result of 571

, GXA7-tMEJ W8BO E991%fD93REMAJD bEYWIME-VOSMf3 CASE (continued N=491-2 cases OF ASME DOEma Ate PnBAStRE YEasst, CODE TABLE -24101 and of the same type and funcnon as those =^aadad INSPECTION PROGRAM A gar examina, ion dwing the inspeedon period. (6) When corrective ameasures in accordance with 3*I tions,'the remamag cosaponent supports within the Impection Periet E inet ses Maximum laspectiea calender years of complete 4 Emannotions Imenal Plant sonnce credite4 % system of the same type and ibaction as in (a) above shall be ah 1st 3 loo too (c)(1) When corrective naeasures in accordance with 2nd 7 33 67 3000 are required as a result of the additional examma-10 100 100 tions in (b) above, *raminatiana shall be attended to include all nonexampt supports potennally subject to 'd y y the same fhilure inodes that required corrective measures M in accordance with (a) and (b) h ao 66 75 23 10o 100 (2) These additional *warmaneinna shall include nonexempt component supports in other systems when e 27 s 16 support failures requiring corrective sneaswes indicate y y y non-tystem-related support failure modes. 37 7s too (4) When correctiw measmes are required by (c) ao too above, the Owner shall examine those exempt compo-near supports that could be affected by the same ~ observed failure modes and could affect nonexempt cosnponents. TABLE 2410-2 INSPECTION PROGRAM S 2500 EXAh0 NATION REQUIREMENTS calender Y The following shall be er,miaed in accordance with . Plant Service Mininunn Maninum Table -25001. Impaction Wein the Examinations Emminations (a) mechanical connections to pressee retaining com-Intenes amenei compient % creditet % ponents and bul!dag structwo; 1st 3 16 y (6) weld connections to buskhag structure; 7 so 67 (c) weld and =ad==ical raaaaeaaae at intermediate i le 100 100 joints in multiconnected integral and nonintegral sup-l I l N y clearances of guides and stops, ali a=*=' of f to too too supports, and assembly of support items; (t) hot or cold settings of spring supports and con- = stant load supports. (f) accessible slidag swfaces, -2510 Supports Selected for Fr==I=assa= the - -. -./, required by (b) above, the % schedule may severt to the,=, *_ of (a) above. Component and piping supports shall be examinad ^ ,g in accordance with Table -2500-1. Ce supports to be examinad shall be the supports of those compo-(a)When component supports must.be subjecaed nests that ase required to be avaminad under IWB-2500, so conessive measures in accordamos with -3000, the IWC-2500, IWD-2500, and IWE-2500 by volanetnc, component suppers 3===A=*=ly a4acent to those for surface, or visual (VT 1 or VT-3) eraminarian, methods, which corrective action is required shall be exasnined. Pipes supports to be examined shall be the suppens l Also, the *=ami= aria== shall be eva==d=d to include of piping not ensempted under !WB 1220, !WC 1220, addaia-a8 suppens wittua the system, equal in aanbar IWD-1220, and IWE 1220. 672 ~

u-m m CASE (continued) N-491-2 c = o,

u. a. m co E'S-3li l 1111 1I ig }

>} } } ,s af j[ill} } ! 'l 1lI]1 is i ja a 5 !! !! !I I I I I ).I >}*II i ! Il iiii n!'f1l _pli ipt e_ jj 1111 e. e e g i lq f a hj i 2 1 E g j j j j 1))=

i i i i

5llha al h. i, If 1- {i l 1 I i 15 3 111 i i 11: i r! i i i III i l{ l II il p;Il "l :: !! 673

~ U , GRf-t4-6 G W 80 OGaYlifEKWMt bMMcThsM @Nf3 1 ~ CASE toontinusen N-491-2 casas or Asnes son.sR A19 FREsSURE VtaeR8 CODE 2520 Method of Esaadasdse (6) If a component support or a portion of a compo-n*nt 8uPPwt. has been evaluand a tested and deta-De methods d er==inasian shall comply wis those la Table -2500-1. Alternative methods of examination nmed m k @le h h in accadance wie ~3I M *

- Y N""

?" g, of IWA-2240 may be used. to restore the component support to its engmal design condition. De requirements of-2220 are not applicable after corrective measures of -3112.2(a) are performed. (c) and span shah meet the mqh 3000 STANDARDS FOR REAMINATION d AM EVALUATIONS 3100 EVALUATION OF EXAMINATIOlv -3120 Inservios Ir===I==*8a=a RESULTS -3121 General Inservice nondestructive examina-3110 Presserlee Esaadandens de perfamed ddag w at &c and d smeWw inspecdon intervals to sneet the requirements of Table 3111 GenereL De p.ee.d.ee **=laa'=ons per* -25001 and conducted in accordance with the proce-formed to meet the requisesnants of -2000 shall be dures of IWA 2200 shall be evaluated by comparing evaluased by compenng the e===inasian results with the rer.ults of ernminatinae with the =r~ *-- ? stan-acceptance standards specined in -M00. derda specined in -3400. -3112 Acceptance -3122 Acceptamos 3112.1 Aseeptmace by ar*==8==88a= Compo-3122.1 Aeoeptance by P===a-asca= Compo-neat supports whose examinations do not seveal condi-reent supports whose examinarians do not = veal condi-tions described in M10(a) shall be aaaar'ahl for does described la -3410(a) shall be acceptable for service. condnued service. Veri 6ed changes or conditions Acen 3111.2 Acesplance by Correction. Component Priw exanunedoes shan k 'M in ** supporn whose e==ianciaan aveal conditions de-wis MA4220. scribed in -3410(a) shall be mace *peahte for servim 3122.2 Acceptance by Correcdon. Comporant until such conditicos are corrected by one or enore of supports whose eraminations reveal conditions de-the sonowing-scribed in 3410(a) shall be unacceptable for continued (a) a4=*maar and raar==ination in accordance with service until such conditicas are corrected by one or -2200 for condideas swm as more of the following: 1 (1) detached or loosened mechanical connections: - (a) aquatment and reexarniancian in accordr.nce with (2) improper hot or cold sostings of spring supports 2200 for condidons such as; and constant load supposts; (1) detached or loosened mechanical connections; (S) =ht of supports; or (2) ; r. r. bot or cold sesdags of spdag supports e (4) improper displacement settings of guides and constant load supportsi and stops. (3) misalignment of supports; or (6) repair in accordance with IWA-4000 and reexami-(4) improper displanament nation in accordance with -2200; and stops. settings of guides (c) replacennent in accordance with !WA-7000 and (6) repair in accordance with IWA-4000 and reexami-

=a==lanetaa in accordance with 2200.

nation in accordance with -2200; ~ 7 (c) replacement in accordance with IWA 7000 and -3112.3 Acesplance by Evaluation er Test reexamination in accordance with -2200. . (a) As an absenssive to the requirements of-3112.2, a componset support or a portion of a compensat -3122.3 Acceptance by ties or Test support containing relevant conditions that do not meet (a) As an alternative to the requirements of -3112.2. ihe acceptance standards of -3410 shall be acceptable a component support er a perdon of a component for service without conective menswes if an eyelustion support containing = levant condidens that do not meet i er seat demonstrases the component suppost is acceptable , the acceptance standards of -3410 shall be acceptable i forservice. for connaued service wisboot corrective measures if an 674 l 1

n nu-oAsturww m M [- CASE (continued) N-491-2 cons or==.oan an masuns mesi,caos evaluadon or test demonstrates the carapanaar support 4400 ACCEPTANCE STANDARDS k acceptable for condnued h -3410 Acceptance Standards-C__ _ Et (6) If a component support or a pordon of a compo-Support Structural Integrity ment support, has been evaluated or tested and deter-mined to be Wu-for condnued service in accord-(a) C,-+ support conditions which are unac-ance with 3122.3(a), the Owner may perfonn corrective captable for continued service shall include the fol-measures to restore the component support to its original lowing-design ea-A'iaa 'Ibe requiresnenas of 2220 are not (1) deformations or structural degradations of fas-apphenble after correedve measures of -3122.2(a) are teners, spnngs, cJamps, or other support isems; i perfonned. ] (2) mis:ing, #=e5=t. or loosened support items; (c) Records and reports shall meet the requirements d (3) arc strikes, weld splatter, paint sconng, of IWA 6000. raaf =aa, or general corrosion on close tolerance me-chined or sliding surfaces; (4) improper hot or cold settings of spring supports and constant load suppons: (5) misalignment of suppons: (6) improper clearances of guides and stops. (k) Except as denned in (a) above the following are examples of non-relevant conditions: (1) on (e.g M Punching, layout, 4200 SUPPLEMENTAL EXAMINATIONS bending, rolling, and machining); Pr==tamaaae that desect condidons that reguue evalu-(2) chipped or discolored paint-, ation in secordance with the rega

. of -3100 (3) weld splatter on other than close tolerance i

may be supplemented by other===ia=* ion methods machined or sliding surfaces; and 'd ~r (IWA-2000) to determine abe character (4) scratches and surface abrasion marks; of the Saw (i.e., size, shape, and orientadon). Visual (5) roughness or general corrosion which does not czaminadons that detect surface saw that exceed 4400 reduce the load bearing capacity of the support, criteria shall be supplemented by either surface or . (6) general conditions acceptable by the material, volumetric examianhane Design, or Construction Specifications. 1 $15 l TOTAL P.22 Y l

June 3, 1999 MEMORANDUM TO: File FROM: Thomas W. Alexion, Project Manager, Section 1 ORIG. SIGNED BY Project Directorate IV & Decommissioning - Division of Licensing Project Management

SUBJECT:

BACKGROUND INFORMATION PROVIDED BY THE LICENSEE IN SUPPORT OF RELIEF REQUEST RR-ENG-2-8 (TAC NOS. MA5464 AND MA5465) By letter dated May 17,1999, the licensee submitted Relief Request RR-ENG-2-8, which requests relief from the ASME Code based on the provisions of Code Case N-491-2. The NRC staff asked the licensee if it had done any comparisons between Code Cases N-491, N-491 1, and N-491-2 that it would be willing to share with the staff. The licensee indicated that it had and provided the attachment. The purpose of this memorandum is to place the attachment in the Public Document Room. Docket Nos. 50-498 and 50-499

Attachment:

As stated DISTRIBUTION: Docket Files (50-498 andDtf400)7 PUBLIC DOCUMENT NAME: G:\\PDIV-1\\SouthTexas\\MEMA5464.WPD TO recelVe e cop r Of Ihis document hdicate in the bor C-Copy wlO attachment /enCbsure E-Copy web attachment /encbsure N = No copy f OFFICE PDIV-1/PWE PDIV-D/LA E TAlexihn-ICJamerson h/ NAME DATE 6/ /99 6/ 3 /99 [ i OFFICIAL RECORD COPY

r-p* ~ s% y3 UNITED STATES g NUCLEAR REGULATORY COMMISSION ~ WASHINeToN, D.C. asse64eM l June 3, 1999 MEMORANDUM TO: File FROM: Thomas W. Alexion, Project Manager, Section 1 l Project Directorate IV & Decommissioning Division of Licensing Project Management

SUBJECT:

BACKGROUND INFORMATION PROVIDED BY THE LICENSEE IN I SUPPORT OF RELIEF REQUEST RR-ENG-2-8 (TAC NOS. MA5464 l AND MA5465) By letter dated May 17,1999, the licensee submitted Relief Request RR-ENG 2-8, which requests relief from the ASME Code based on the provisions of Code Case N-491-2. The NRC staff asked the licensee if it had done any comparisons between Code Cases N-491, N-491-1, i and N-491-2 that it would be willing to share with the staff. l The licensee indicated that it had and provided the attachment. The purpose of this memorandum is to place the attachment in the Public Document Room. Docket Nos. 50-498 l and 50-499

Attachment:

As stated l I l l l i 4 i ~ \\ j

s SOUTH TEXAS PROJECT NUCLEAR OPERATING ~ /MA COMPANY f =$i! ! sh a NUCLEAR LICENSING "'7h.h k ,f) ff f' g f P. O. Box 289 Wadsworth, Texas 77483 fax 5110718298 r a. t r' a n s, m 1t t a 1 . (- To: L QWean i Fax #: %Mg\\%b=e TRLEPHONE #/EXTN. -Sn-9 n.-r35z Date: $7w/e Re: 0.n-E9 s T

Pages it

. Induding this cover sheet NOTES: 0.EN1 - coda ~ es U"'MI; M-49i-t '- 4 M-v'I-' - Du.rm A, 6 bow cLrcleA l VERIFICATION # (512) 972-8124 ) Attachment

r-

SUMMARY

OF CHANGES BETWEEN CODE CASES N491, N 491-1 AND N491-2 Paragraph -1220 Paragraph -1220 in N-491 references the requirements of IWF-5000. Paragraph -1220 in N-491-1 and N-491-2 references the Section XI , edition and addenda specified in the Owner's ISI program. Paragraphs -3112.3 and -3122.3 These th paragraphs were revised in N 491-2 to clarify that a support containing a relevant condition could be put into service (or tiack into service) if it were found acceptable by evaluation or test. Also, these , paragraphs in N 491-2 allow a support with a relevant condition found acceptable by evaluation or testing to be restored to the original design condition without performing the examinations specified by -2200. 1 'b ._ ; ' ' ~ ~ ' ~_Z J~.Z _. " TZ ~~ _ _. ~ ~~ ~ ~ '~

m r-bMt>c N-491 CASES OF ASME sorLER AND PRESSURE VESSEL CODE ~ 1 1 Approvel Date: Ma,ch 14,1Mt See NumeAcalindes for anpireden l end any mmnnarian dean. I '3000 STANDARDS FOR EXAMINATION i Case N el Alternative Rules for Enamination of Class 1,2,3, EVALUATIONS j and MC Component Supports of Light Water 3100 Evaluation of Examination Results Cooled Power Flames 3110 Preservice Examination Section XI, Division 1 -3111 General -3112 A = ;*= = Inguhy: What alternative examination require-2120 Inservice Emnina'hns ments to those stated in Section XI, Division 1 Sub-3121 General section IWF may be used when determining the com- -3122 Acceptance ponent supports subject to examination and 3200 Supplemental Examinations establishing requirements for component supports? 3400 Acceptance Standards 3410 A~pe== Standards - Component & ply: It is the opinion of the Committee that the Support StructuralIntegrity foliqping alternative rules may be used for determin-ggg ing component supports subject to examination and -2410 1 Inspection Program A for establishmg czamination requirements for Class 2410 2 Inspection Program B 1,2,3, and MC component supports under Subsec- -25 @ 1 htion Cap ' tion IWF, Section XI, Division 1. 4 -1000 SCOPE AND RESPONSIBILITY, TABLE OF CONTENTS 1100 SCOPE l -1000 SCOPE AND RESPONSIBILITY 1100 Scope his Case provides alternative rules for inservice -1200 Component Supports subject to Exam-Inspection of Class 1,2,3, and MC component sup-ination and Test ports. 1210 Examination Requirements 1220 SnubberInspection Requirements 1230 Supports Exempt from Examination 1200 COMPONENT SUPPORTS SUBJECT -1300 Support Examination Boundaries TO EXAMINATION AND TEST -2000 EXAMINATION AND INSPECTION 1210 Examination Requirements 2100 Scope -2200 Preservice Examination ne examination requirements shall apply to the 2210 Initial Examination following: -2220 Adjustment, Repair, and Replaecment (a) piping supports; -2400 Inspection Schedule (6)su orts other than piping supports. 2410 Inspection Program 1220 SnubberInspection Requirements -2500 Examination Requirements The inservice inspection requirements for snub- -2510 Supports Selected for Examination bers shall be in accordance with the requirements of -2520 Method of Examination IWF 5000. supr. to - NC 834.1

:.~2

~~T~ T

L

am-m.om N-491 CASE $ OF ASME SOttEt AND PRESSURE VESSEL CODE ( ~E 1230-Supports Esempt from r===laation a4usted in accordance with -3000, repaired, or re. Component supports exempt from the examination p requirements of 2000 are those connected to com-ponents and items exempted from exammation under greater than 200'F during normal plant operation, IWB.1220,1WC.1220, IWD4220, and IWB 1220. In the Owner shall perform an additional preservice ex-anunat n on the afected wmponent suppwts de addition, portions of supports that are inaccessible by being encased in concrete, buried underground, Ing w foi g the subsequent systern heatup ami or enesysulated by guard pipe are also exempt from cooldown @c dess deteded unnecessary by the examination requirements of 2000. u8 tion-is exa8ninat 8 AH e Pedormed de Ing operation or at the next refueling outage. 3 1300 SUPPORT EXAMINATION BOUNDARIES Support. examination boundaries shall be in ac-2400 INSPECTION SCHEDUI2 cordance with IWF 1300. 2410 Inspection Program (a) Inservice czaminations shall be performed 2000 EXAMINATION AND either during normal system operation or plant out-INSPECTION ases. 2100 SCOPE (6) The required examinations shall be completed in accordance with the inspection schedule provided The requirements of this Case apply to the ex-in Table -24101 or Table -24142. amination and inspection of component supports, but (c) The inspection period specified in (b) above not to the inservice test requirements ofIWF 5000. may be decreased or extended by as much as one year to enable an 8-Won to coincide with a plant outage, within the limitations of IWA-2400. 2200 PRESERVICE EXAMINATION (d) Following completion of Program A after 40 2210 Initial E===lastion p, m6e pe e

M kb b 10 year inspetetion interval of Program B.

. (a) All examinations listed in Table 2500-1 shau be performed completeJy, once, as a preservice ex-amination. These prese vice examinations shall be 2420 Successive Inspections extended to include 100% of all supports not ex-(a) De sequence of component support exami-empted by-1230. nations established during the first inspection inter-(b) Examinations for systems that operate at a val shall be repeated during each successive inspec-temperature greater than 200*F during normal plant tion interval, to the extent practical. operation shall be perfonned during or following in. (6) When a component support must be subjected itial system heatup and cooldown. Other examina-to corrective measures in accordance with 3000, that tions may be performed prior to initial system heatup support shall be reezamined during the next inspeo-and cooldown. tion period listed in the inspection schedules of the inspection programs of 2410. 2220 Agustment, Repair, and Replacement (c) hen adenal cod measures are w 1 required during the next inspection period as a result (a) Prior to return of the system to service, the of the examinations required by (b) above, the in-applicable examinations listed in Table -2500-1 shall spection schedule may revert to the requirements of be performed on component supports that have been (a) above. suPP. ie - sec 834.2 ~~ ~ ~ ~ mmy e .sewom * ' ~ ~

O W18 972 8298 P.05/22 ~ N-491 l., CASES OF ASME BOE2R AND PnE8sUnEVEsSEL CODE 2434 Additlenal Examlastions (a) When component supports must be subjected to corrective measures in accordance with -3000, the component supports immediately agacent to those TABLE 2410-1 for which corrective action is required shall be on-INSPECTION PROGRAM A amined. Also, the examinations shall be extended to include additional supports within the system, equal lasputw Periet Mivaman Mani"" in number and of the same W and function as those Inspection CalendarYearsof Examinahens Esaminalises scheduled for mmination during the inspection po-leimal Piant smice ceasinet s ceasset s riod. la s too too (6) When corrective measures in accordance with -3000 are required as a result of the additional ex-l and 7 3s 67 aminations, the rema!ning component supports with-in the system of the same type and function as in (a) 1 abooe shall be==fW - i sev ts u y av eo so (c)(1) When corrective measures in accordanos E so 66 75 with -3000 are required as a result of the additional 1 l as tw su examinations in (b) above, examinations shall be ex- ) tended to include all nonexempt supports potential $ 3 i subject to the same failure modes that required cor-so as y 33 so 67 rective measures in accordance with (a) _and (b) 37 75 200 above. (2) These additional examinations shall include l 1" nonexemp: component supports in other systems when support failures requiring corrective measures indicate non system-related support faGure modes. (d) When corrective measures are required by (c) a the her shan exambe nose exemp TABLE -2410 2 Ponent supports that could be affected by the same INSPECTION PROGRAM g observed failure modes and could affect nonexempt , =A g.3,,,,,,g calendar Years of Plant Servier Minimum Maximum inspwelen whhin vie-Examinaisons saaminations 2500 EXAMINATION REQUIREMENTS Intereal Inimes complete (% cement u. De following shall be examined in accordance 1st 3 16 M with Table -25001. (e) mechanical connections to pressure retalning 7 so 67 se see too components and building structure; (6) weld connections to building structure; s,,,,,w 3 a u y so or (c) weld and mechanical connections at intermo-to too too diate joints in multiconnected integral and noninte-gral supports; (d) cdearances of guides and stops, alignment of supports, and assembly of support items; (c) hot or cold settings of spring supports and con-E stant load supports; (/) accessible sliding surfaces. i SUPP. to - NC 834.3 wi 19m n.msm'% Ma-2 me.re

L. tGeahn5MasdR9 bttancNs> t/.tO9td N-491 can or uus.om u. u= = co. ( 'l 1111 1111 = 1 iiii 4 l.i1 h j=l.I<II il Iii; I li1g {1! j-l n ~ 1 ld-l1 i'i i i !! 'l. } i f,l i g jj teit litt la a I Ii t Nj jl 1le i liii 8 1111 }1.-> I1!,11 i li'u' 5] 111,1: il l l I iu1 jji133 pId.q I 1, 1 in e+ vee. w eee weemp - e,--e,m-4 w.

etxuurmutu m rtm n.2cr,n w tc N-491 CASES OF AsME 305.2R AND PREssUar VEssIL CODE 2514 Supports Selected for Examinaden (2) improper hot or cold settings of spring sup. ports and consunt load appats; O=~=ent and piping supports shall be examined ' 0) 8nl88H nm*nt of SUPPOM # 8 in'acocIrdance with Table -25001. Component sup. ports to be' examined,shall be the supports of nose and " @ components that are required to be examined under .py repalt in accordance with IWA 4000 and reen. IWB-2500, IWC-2500, IWD.2500, and IWE-2500 by gg g, g, g g volumetric, surface, or visual (VT-1 or VT4) exam-(c) replacement in accordance with IWA-7000 and methods. % wppats to be examined reexamination in accordance with -2200. shall be the supports of piping not exempted under y nw j IWB 1220, IWC 1220, IWD 1220, and IWE-1220. 3112.3 Acceptance by Evaluation or Test As an alternative to the requirement of 3112.2, a compo. nent support that is unacceptable for service may be 2520 Method of ha=l=ah= analyzed or tested to the extent necessary to sub-The methods of examination shall comply with stantiate its integrity for its intended service. Records those in Table 2500-1. Alternative methods of ex-and reports shall meet the requirements of IWA-amination meeting the requirements of IWA.2240 6000. may be used. 3120 Inservice haml==tions 3000 STANDARDS FOR EXAMINATION EVALUATIONS 3121 General. Inservice nondestructive examina. E tions performed during or at the end of successive 3100 EVALUATION OF EXAMINATION Inspection Intervals to meet the requirements of Ta-RESUI,T8 ble -2500-1 and conducted in accordance with the 3110 Preservice h==8=a*Ea=a. procedures of IWA 2200 shall be evaluated by com-Paring the results of examinations with the accept-4111 General. The presetvice examinations per-ance standards specified in -3400. formed to most the requirements of 2200 sha!! be evaluated by comparing the examination results with 3122 Acceptance acceptance standards.34&d in -3400. 3122.1 Acceptance by Examination. Component E 4112 Aw,'.m supports whose examinations do not reveal condi. -3112.1 Acceptance by Examination. Component tions de. scribed in 4410(a).shall be acceptable for j supports whose examinations do not reveal condi-continued service. Veri 6ed changes or conditions tions described in 3410(a) ahall be acceptable for from prior examinations shall be recorded in accord-service. anee with IWA 6220. -3112.2 Acceptanos by Correction. Component 3122.2 Acceptance by Correction. Component E supports whose examinations reveal conditions de-supports whose examinstions reveal conditions de-scribed in 3410(a) shall be unacceptable for service scribed in 4410(a) shall be unacceptable for conti-until such ~he are corrected by one or more nued service until such conditions are corrected by of the following: one or more of the following: ) (e) a4usement and reexamination in accordance (a) adjustment and reexamination in accordance with -2200 for conditions such as with -2200 for conditions such as

) detached or loosened mechanical conneo-
) detached or loosened mechanical connee-tions; tions; SUPP.10 - NC 834.5

.-.m

tWW-24-1999 15211 63sLSU LWa3L1Kd %WS 6 bMD3 Leontinute) N-491 .i. ~ CASES OF AsME DORI.ER AND M388tas VESSEL CODE ( ~ (2) leproper hot or cold = :' ; of spring sup. - -3400 ACCEPTANCE STANDARDS ports and constantload supports; (J) misalignment of supports;or gg g,,g gg, i______ ,,, g ,,,,,,,g,,,,,,,, .. -(d) Improper displacement settings of guides ' and stops.. (s) Component support conditions which are un-(6) repair in accordance with IWA 4000 and reen-acceptable for continued service shall include the fol-amination in accordance with -2210,. lowing: (c) mplacement in accordanoe with 1WA 7000 and (1) defonmations or structural degradations of reezamination in noe with -2200. fasteners, springs, clamps, or other support items; t E 3122.3 Acceptance by Evaluation erTest. As an I} 8* g" alternative to the requirement of 3122.2, a compo-ment support or portion of a component support (J) arc strikes, weld splatter, paint, scoring, ,,g,% which is unacceptable for conte, ued wrvios may be - analysed and/or tested to the extent necessary to e machinh % s% stantiate its integrity for its intended service. Receds (#1 imPr8Per hot or cold uttings of spring sup-E and repotts shall meet the requirements of IWA-Pons PPMW. m@ n ofM (d) improper clearances of guides and stops. (6) Except as defined in (a) above, the following are examples of non-relevant conditions: E 3200 SUPPLEMENTAL EXAMINATIONS. (1)fa dos marks (e4, h punchhg,5 out, bending, rolling, and==chla' g); m Examinations that detect conditions that require (2) chipped or discolored paint; evaluation in accordance with the requirements of (J) weld splatter on other than close toleranos -3100 may be supplemented by other examination machined or sliding surfaces; methods and techniques (!WA-2000) to detennine (#) scratches and surface abrasion marks; the character of the flaw (La., size, shape, and ori- , (5) roughness or general corrosion which does estation). Visual araminations that detect surface not reduce the load bearing capacity of the support; flaws that exceed -3400 criteria shall be supplement. (6) general conditions acceptable by the mate-ed by either surfsos or volumetric examinations. rial, Design, or Ccs L 2ien Specifications. 4 SUPP.to =ssC 334 4 f 7 3~ --- -.

~ CASE N-491-1 CASES OF ASME DOILER AND PRES $URE VESSEL CODE Approves pow: Apre so.1ess see Numedees e,nar Av espreesise end enynoemenen neeen. Case N 4911 -1000 SCOPE AND RESPONSIBILITY Alternative Rules fbr hamination of Cass 1,2,3, and MC Component Supports of Ll6ht-Water 1100 SCOPE Cooled Power Plants This Case provides alternative rules for laservice

II' N I' inspection of Cass 1,2,3, and MC component sup.

Ports-1200 COMPONENT SUPPORTS SUBJECT Ingssy; What alternative naamination require-ments to those stated in Section XI, DMalon 1, Sub. TO EXAMINATION AND TEST section IWF may be used when determining the com- -1210 Examination Requirements ponent supports subject to aramination. and b mhh @mu M g a b establishing requirements for component supports?. g,7g,,g,,, (s) piping supports; (6) supports other than piping supparu. Sahbba Ins W % h Jtepp: It is the opinion of the Committee that the 1220 following alternative rules may be used for determin-ing component supports subject to examination and The inservios inspection requirements for snub-for establishing examination requirements for Cass bers shall be in accordance with the Section XI Edi-1,2,3,- and MC component supports under Subsee-tion and Addenda speci5ed in the Owner's Inservice tion IWF, Section XI, Division 1. Inspection Program. j TABLE OF CONTENTS 1000 SCOPE AND RESPONSIBILITY 3000 STANDARDS FOR EXAMINATION 1100 Scope EVALUATIONS s -1200 Component Supports Subject to Exam-3100 Evaluation of 9==i== tion Results 3110 Preservice Laminatian inntion and Test ~ 3111 General 1210 F_mamination Rg=*. 1220 Snubber!= +T-:= Requirements 3112 Acceptance 3120 Inservice Examinations -1230, Supports Exempt from Pmaminadaa -1300 Support Examination Boundaries -3121 General 2000 EXAMINATION ANDINSPEC110N -3122 Acceptance 2100 Scope 3200 Supplemental h=Inadaan -2200 Preservice hmiandan 3400 Avoe Standards M10 Aeoeptance Standants P=,---- . 2210 Inidal heinada. -2220 Acquatment, Repair, and M*P aramaar Support Structural 1ntegrity l l 2400 Inspection Schedule 2410

- p - r,osrum 2420 Successive Inspections

. 2430 Additional Psaminations TABI28 -2500-hmination Req _* - 2410 1 fv*~ Program A 2510 Supports Selected for h=3= asian 2410 2 Inspection Program B -2520, Method of h=landam -2500 1 h=inadaa Categories 915 e--p., +-r-9i ,,1sem-mawgge% sm E**me, ee e _ w agm=p-e gag,., 9 m-e--- --w

E .N CASE (continued) N-491-1 CASES OF ASME SoEER Mn FatssUna VESSEL Coot . 1230 Supports Esempt frass F===l==*8= aqusted in accordance with 3000, repaired, or so-Compment suppons exempt from es examW For systems that operate at a temperature requirements of -2000 are those connected to com-ginter than 2007 during normal plant opemtion, ponents and items exempted from examination under the Owner shall perform an additional preservice en-IWB-1220, IWC.1220, IWD-1220, and IWE.1220. In ,.made a se h et e dur-addition, W d suppons est an Mle ing or following the subsequent systean bestup and by being encased in concrete, buried underground' cooldown cycle unless determined unneccesary by or encapsulated by guard pipe are also exempt from paluh.M Muh salt be #d dur-2e don reqhts W-2000. Ing operation or at the next idA outage. -1300 SUFFORT EXAMINATION BOUNDARIES Support==Imadan haaada ies shd be in ae-2400 INSPECTION SCHEDUIZ cordance with IWF 1300.- -2410 Inspection Program (a) Inservice examinations shall be i id -2000 EXAMINA'110N AND either during normal system operation or plant out-INSPECITON ages. G) The required examintions shall be completed -2100 SCOPE in accordance with the 8 W= schedule provided 2 The requirements of this Case apply to the es-in Table -24101 or Table -2410 2. amination and inspection of component supports, but (c) The inspection period Waad in (b) above not to the inservice, test requirements of IWF 5000. may be decreased or extended by as much as one year to enable an inspection to enlacide with a plant outage, within the limitations of IWA-2400. '2200' FRESERVICE EXAMINATION (d) Following completion of Progrant A after 40 l years, successive inspeedon intervals shan foDow es -2210 Initial t===laation 10 year 8Pa= interval of Program B. (a) All examinations listed in Table 25001 shall be performed completely, once, as a preservice es- ,,, g,, amination. These preservice examinations shan be extended to include 100% of all supports not ex-(a) The sequence of component support exami-empted by -1230. nations established during the first==,+++n inter-(6) haminations for systems that operate at a val shall be, repeated during each successive inspoo. temperature greater than 2007 duriang normal plant tion interval, to the extent practical. operation shall be perfonned during or following in. (6) When a component support must be subjected itial system heatup and cooldown. Other==Ima-to corrective measures in accordance with -3000, that i tions may be pedormed prior to initial system heatup support shall be E==!=M during the next inspeo. and cooldown. tion period listed in the inspection schedules of the laspection programs of 2410. (c) When additional wi.,,A measures are not M E8 Pair, and Esplaesamt required during the next inspection period as a result (a) Prior to return of the system to servloe, the of the examinatkas required by (b) above, the in. applicable examinations listed in Table -25001 shall spection schedule may revert to the requirements of . be performed on component supports that have been (a) above. 94 ~.. : ~.~.'.L ~ ~:

~ T:"~

~

w A3PetuJ wwns tac w nsusa n m CASE (continued) N-491-1 casas of AINE 50tum AND PatssURE Vs3sIL CODE 200 Additiesa! Eraml=nesana (a) When component supports must be sut=jected l to corrective measures in accordance with -3000, tbs component supports immediately agacent to thoes TABLE 24101 for which corrective action is required shau be es. INSPECTION PROGRAM A amined. Also, the examinations shall be ewa=AmA to include additional supports within the system, equal D. 3'unealm WYM# N scheduled for avamination during the inspection pe-neinimen asemi"""" la number and of the same type and funaion as those I riod. na s see too (6) When corrective measures in accordance with 3000 are required as a result of the addirla==1 as-ans ? ss 6' aminations, the remaining component supports with-in the system of the same type and function as in (a) sed u u u above shall be examined. 27 4e se (c)(1) When corrective measures in accordance to M 7s .with -3000 are required as a result of the additional as too tu araminations in (b) above, examinations shall be as-tended to include all nonexempt supports potentially a n as y subject to the same faDure modes that required oor. 3: so 67 rective measures in accordange with (a) and (b) 37 7s too abows. 1# (2) These additional examinations shall include nonexempt component supports in other systems j when support failures requiring corrective measures indicate non-system-related support failure modes. I s (d) When corrective measures are Ics .4 by (c) above, the Owner shall examine those exempt com-INSP C N Mg Ponent suppwts that dd k ageded by &c sans observed fauure modes and could affect nonesempt inspeeden Perle 4 calendar Years of Plant Sorelse Mielman Masinum Inspeanen wieds ne' Examinacens Examinadens -2500 EXAMINATION REQUIREMENTS Interval Interval campieted, % crediast % The following shall be examined in accordance ta 3 u M with Table -25001. 7 so 67 (e) mechanical connections to pressure retalning a tm zu components and building strucsure; seesness : s u u (6) weld connections to buuding structure; u er (c) weld and mechanical connections at intanne-se see see diate joints in multiconnected lategral and noninte-gral supports; (4) clearances of guides and stops, alignment of supports, and assembly of support iteshs; (e) hot or cold settings of spring supports and son. stant load supports; (f) accessible sliding surfaces. M5 ,2 .w 9 - .e ag me,umaka- ,+re ,e,F$wg hdum.e ie-m u p.

case ( e N-491 ' cm. or u=.oaa n. -==, co l 1111 111i f 3.111 jIil l l j. g l5558 1il I i 11 i ll siii i .I lI I i l ~' aj l l1 l l-l l l'1 i 1: i lb iiii i l 118 iiii } I I ! l1 i II } } } Ils 3 11 i i i }II. { ig 14 l!!I il.I m

---=-

=

T

ut.%rttuto CASE (continued) N-491-1 cases ormm.oumn, am w c o. Supperss alacead 8st had==% (2) improper hot or cold settings of spring sup-s 4 519 F =t and % W shd be awadad ports and constant load supports; in asocIrdance with Table -25001. Component sup. NI "I'"I'8""**' 'I M ports to be examined shall be the supports of those H)ImPF0Per dWnt sonings d guides g 880 P8-components that are required to be examined unde, .@) NPair in accordance with IWA6 and reex-IWB 2500, IWC 2500, IWD-2500, and IWE 2500 by volumetric, surface, or visual (VT-1 or VT 3) exam. re t withIWA4000 and instion methods. Piping supports to be==iad reexam tion in accordance th -2200. . shd be the supports of piping not caempted under IWB-1220, IWC 1220, !WD 1220, and IWE 1220. -3112.3 Acceptsace by laaties orTest. As alternative to the requirement of 3112.2, a compo-neat support that is unacceptable for service may be

4gy,

,g,,,m analyzed or tested to the extent necessary to sub. The methods of examination shall comply with stantiate its integrity for its intended service. Records those in Table -25001. Alternative methods of ex-and reports shall most the requirements of IWA-amination meeting the requirements of IWA-2240 6000.' may be used. ~ 3000 STANDARDS FOR 4 120 Insavice n=adnations EXAMINATION EVALUATIONS 3121 General. Inservice nondestructive examina-4 100 EVALUATION OF EXAMINATION tions performed during or at the end of successive RESUI,TS inspection intervals to meet the requirements of Ta-ble -25001 and conducted in accordance with the 4 110 Preservice R===t=ations procedures of IWA 2200 shall be evaluated by ocas. 4111 General The preservice examinations per-paring the results of examinations with the accept-formed to meet the requirements of 2200 shall be ance standards speafied in -M00. evaluated by comparing the examination results with 3122 Acceptance standards W in M -3122.1 Acceptance by F==Imaties.C~ raat 4112 Aseeptanee supports whose examinations do not reveal condi. . 4112.1 Acceptanee by Examlastion. Component tions described in 4410(a) aball be===*=m for suppons whose amaminations do not reveal condi-continued service. Verified changes or conditions tions described in 4410(a) shall be acceptable for . from prior examinations shall be recorded in accord-sewice. ance with IWA 6220. 4112.2 Acesytance by correction. C-aa---t 3122.2 Acceptance by Cornetloa. CP' supports whose examinations reveal conditions de-supports whose examinations reveal conditions de-scrhed la 4410(a) shall be unacceptable for service scribed in 4410(a) shall be uns,-ele for conti-untB such conditions are corrected by one or more nued service until such conditions are corrected by of the following: one or more of the following: ~ (e) equstment and ressamination in accordance (e) aqustment and reezamination in accordance with 2300 $pr conditions such as with -2200 for conditions such as (1) detached or loosened mechanical conneo-(1) detached or loosened mechanical connec-tiens; tions; i 917 3-

i~***b'WM R

wm.g_an -oL-6 rm 9 + -m

o CASE (continued) N-491-1 3 cases or AsuE sonza AND FREsSURE VEsSSL C048 p) improper hot or cold settings of spring sup - 3400 ACCEPTANCE STANDARDS Pats and constard load sp 3410 Aeoeptman standeres - component - (J) misaligninent of supports; or S*PPart StrossaralIntegelly (4) bnproper displacement settings of gddes (a) Component support conditions which are un-and stops. acceptable for continued service shall include the fol-(6) repair in accordance with IWA 4000 and rear-

==l==*ian in accordancewith 2200; lowing:- (c) replacement in accordanos with IWA 7000 and g) deformations or structural degradations of ra-==8-*8a= 1n accorda th -2200. fasteners, springs, clamps, or other support items; )m detached, w w appat 3122.3

^- n by Evaluation erTest. As an g

alternative to the requirement of -3122.2, a compo-(J) are strikes, weld splatter, paint, scoring, J nent support or portion of a component support. . hich is unacceptable for continued servios may be machined or slidi"I surfanos; .w analysed and/or tested to the extent necessary to sub. I#l " -- _0Per hm or mid W W spring 9 "r- . stantiate its integrity for its intended service. Records Pats uns a reports shall meet the requirements of IWA. {, gg (d) Improper clearances of guides and stops. (6) Except as defined in (a) above, the following are examples of non-relevant conditions: g) fabrication marks (e.34 from punching, lay-3200 SUPPLEMENTAL EXAMINATIONS out, bending, rolhng, and ma*=ta-); Examinations that detect conditions that require (2) chipped or discolored paint; ~ evaluation in accordance with the requirements of (J) weld splatter on other than close tolerance 3103 may be supplemented by other -mination machined or sliding surfaces; methods and techniques (IWA 2000) to determine (4) scratches and surface abrasion marks; the character of tbs flaw (i.e., sire', shape, and ori-(5) roughness or general corrosion which does entation). Visual examinations that detect surface not isduce the load bearing capacity of the support; Saws that exceed 3400 criteria shall be supplement-(6) general conditions acceptable by the mate- ) ed by either surface or volumetric mminations. rial, Design, or Construction S,W*tions. ) 1 l 918 -.7 7

.m m ca.rtn.n.ser viv-A:.> l CASE N-491-2 CASES OF ASME BolLER AND PRES $URE VESSEL CODE l l Approwel Date: Marsh 12, 1987 l See Numerie Indes not espJressen and any sentfirmation deten. Case N 4912 l Alternative Rules for Examination of Class 1,2, 3, and MC Component Supports of Ught Water j Cooled Power Fleets i Seedos XI Divisien 1 Inpiry: What altemative examinadon r%4w to those stated in Seedon XI, Division 1. Subseedom l IWF inay be used when hoJidag the -:c =;=" supports subject to examinadan and establishing as-i l quirements for component suppens? j Reply: k is the opinion of the Committee that the following ahernative rules may be used for determin-lag _ ;===" suppests subject to naminatian and for establishing examination requircanents for cass 1, 2, 3. and MC component supports under Subsecdon IWF. Seedon XI. Division 1. l l l. 1-HT i -.e%.,.s%-

I-- ~ ~ ~ m CASE (continued) N-491-2 CAsss or AsME morLER AND PRE $sURE VESSEL CODE CONTENTS -1000 Scope and ReeponsibGity............................................... 671 -1100 scope................................................................... 671 1300 C4-- Supports soldeet to Essamination and Test................. 671 -1210 Mraminadon Requirements............................................... 671 671 1220 Snubber Inspection P=p' - -1230 Suppens Exempt Aom Examinados...................................... 671 1300 Support Fr==l== tion Boundaries....................................... 671 -2000 Fwaminanna ABd Inspecties............................................ 671 -2100 Scope................................................................... 671 -2200 Preservice F===Imada=................................................. 671 -2210 Initial Examination...................................................... 671 -2220 Adjustment. Repaar, and Replacement..................................... 671 -2400 t; M : Schedale..................................................... 671 -2410 Inspection Program...................................................... 671 -2420 Successive Inspections................................................... 671 2430 Additional Examinations................................................. 672 2500 F===t=ation Requiremments............................................. 672 2510 Supports Selected for F= amin ariaa....................................... 672 m 2520 Method of Examination.................................................. 674 3000 Standants for Examination Evaluations................................. 674 3100-Evaluation of * =tadan Results....................................... 674 3110 Pinervice Fu==iaariaan................................................. 674 -3111 General................................................................. 674 -3112 Acceptance.............................................................. 674 -3112.1 A=j'a= by R= amianhaa.............................................. 674 3112.2 Aspr - by Correction................................................ 674 -3112.3 Acceptance by Evaluation or Test........................................ 674 -3120 Inservios F===tada=,.................................................. 674 -3121 Oceerm1................................................................. 674 -3122 Accepenace.............................................................. 674 -3122.1 Acceptance by Framinariam.............................................. 674 -3122.2 A, by Correctica................................................ 674 = 3122.3 Acceptance by Evaluation or Test........................................ 674 3300

; '- e Examinations............................................. 675 3400 Acceptance Standards.................................................. 675 3410 Amy-- Se=' -i.-

C+-- C^ Support Structural Insegrity............. 675 i e.+nd--ae-- -,,w.<---e,m.es. e. - a w ess m-e--as min eers-- y-eeng4'* d J>=60'WsW=> m -.cp W,mi.mmaw i s-+1W> a Me h e

N e '"" N CASE (contimsed) N-491-2 CASES Of AsMS D0staa Are FREssURE VESSEL CODE Tables 24101 Inspection Prograsa A................................................... 672 -2410 2 Inspeedon Prosrain a.................................................. 672 -25001 R u mminadaa Casesories.................................................. 673 4 4 610 l MA-' -W-- WW+* w .ww.p.mw ..,me,,,p#p, ,,., m,,, ,gi

M M CASE (continued) N-491-2 Casas OF AsME DOE,En AND PanesUnE VIssnt, CODS -1000 SCOPE ANI) RESPONSIBILITY tion. These preservios examinations shall be extended to include 100% of all supports not exempted by -1230. -1100 MPE (6) F.xam n4tions for systems that operate at a temper-1 bis Case provides alternative rules for inservice ature greater then 200'F during normal plant operadon inspeedon of Class 1. 2,3, and MC component suppons. shall be perfanned dunng or foHowing initial system bestup and cooldown. Other naminations may be per- -1200 COMPONENT SUPPORTS SUBJECT TO EXAMINATION AND TEST -2220 Aquetement, Repair, and Replaceument -1210 E===laation Requirements (a) Prior to return of the system to service, the APP cable er==inations listed in Table -25001 shall li h aA =* - shu gly a se be perfonned on component suppens that have been foHW adjusted in accordance with -3000, repaired, or replaced. l'I N " (6) For systems that operate at a ky~.cs grenser 6Lp

suppens, than 200'F during nonnal plant operanen, the Owner

,g,,,,,,,,i,,,,,,,,,,,i,,,,,,, ihan perform an addidonal premrvice examiami= = the affected +-;--- = supports during or foHowing The inservice inspection requiremaan for snubbers the subsequent system heatup and cooldown cycle unless shall be in accordance with the Section XI Edition and determined unnecessary by evaluation. This ex==iantiaa Addenda speci6ed in the Owner's Inservice Inspection shah be perfonned during operation or at the next Program. refueling outage. -1230 Supports Exempt from P===8=aeta= cv supperis exempt from the===iaariaa -2400 INSPECTION SCHEDULE requirements of -2000 are those eaaaarnad to compo-nents and Isens exempted from examination under -2410 Inspection Programi IWB 1220, IWC-1220, IWD-1220, and IWE-1220. In (a) Inservice amminariaan shall be performed either addition, portions of supports that are lawaaible by during normal system operation or plant outagm being encased in concrete, buried underground, or en-(b) The required examinations shan be compleW in capsulated by guard pipe are also exernpt from the accordance with the 6=,='= schedule provided in examinadon requirements of 2000. Table -2410-1 or Table -2410 2. (c) The inspeedon period speci6ed in (b) above may be decreased or extended by as much as one year to -1300 SUPPORT EXAMINATION m b@ m mincide wit a plant omage, BOUNDARIES within the limitations of IWA 2400. Support===inarion boundades shan be in accont-(d)Pouowing completion of Program A after 40 anos with IWF-1300. years, successive inspection intervals shan fouow the 10 year laspeedon interval of Program B. -2000 EXAMINATION AND INSPECTION 2420 Snocendte Inspections -me SCOPE (s) The aquence of component support av==laarions lhe requirements of this case apply to the examinn-established dunas the Arst inspection interval shnu be tion and inspecnon of component supports, but not to 8ePeared dunng each successive inspeedon insarval, so ihe inswvi= met.e.:. of IWF 5000. the utent pW r (6) When a component support must be subjected to corrective measures in accordance with -3000, that -2200 PRESERVICE EXAMINATION suppoet shan be raa==taad during the next inspecdon Period Ened in te inspeedon sch of te inspeedon -2210 Initial Wama as programs of -2410. (e) AB a=ai==taas lisand in Table 25001 shau (c) When addnional corrective measures me not n-be perfonned completely, once, as a preservice examina-quired during the next inspeedon period as a resuk of 671

CASE (continues 0 N-491-2 casas OF AsME Dogusa Ate PaESSURE YES$at, Coos TABLE 24104 and of the same type and function as those scheduled INSPECTION PROGRAM A for examination during the inspection period. (6) When corrective sneasures la accordance with h -3000 are required as a result of the addidonal exannina-Impaction Calendar Years of completed, Examinations tions, se % compons suppons @ &c Innenal Plant Service Creditet % system of the same type and function as in (a) above shall be avamiamt I'" I (c)(1) When corrective measures in acconlance with and 7 33 67 -3000 are required as a result of &c additional examine. 10 los 100 tions in (b) above, eraminannas shall be - *andad to include all nonexempt suppens,M "y subject so 8'd is 16 M the same failure modes that sequired corrective messees N in accordance with (a) and (b) above. 7 as too too (2) *!bese additional ar==iandaan shall include nonexempt component supports in other systems when 4th 27 s 16 support failures requiring corrective measures indicate 30 as M non-tystem related support failure modes. (4) When correedve measures are required by (c) 37 y, goo ao too above, the Owner shall examine those exempt compo-neat supports that could be affcceed by the same observed failure modes and could affect nonexempt ~ ~."""~~" TABLE -2410 2 INSPECTION PROGRAM 8 I g i,,,, y The followag shall be examined la accordance with . Plant servlee Minimum Maximum Table 25001. Impeetles withis the Eraminations Examinations (a) mechanical aaaaerions to pressure retaining com. Intenal intenal Cenoletet % Creditet % ponents and building structure; ist 3 16 y (6) weld connections to building structure; 7 so 67 (c) weld and =arhanical raaaedaae at intennediase to too too joints la multiconnected integral and nonintegral sup-l N clearances of guides and stops. alipameae of to too too supports, and ane'aMy of support teams; (e) hot or cold settings of spring supports and eco-stant load supports. (f) accessible sliding surfaces. the====iaadaaa seguind by (b) above, he % 2310 Supports Selected for Fra=I=ada= schedule may revert to the r, ' - of (a) above. Component and piping supports shall be *'ad=ad g la accordance with Table -25001. O-- -g----- supports to be esaminad shall be the suppons of those compo-(a) When component suppons innst be subjected nests that are required to be avaminad under IWB-2500, to cetractive measmos la neoordanos with -3000, the IWC 2500. IWD-2500, and IWE-2500 by volumetric, component suppens i==adia*aly a4acent to those for saface, or visual (VT 1 or VT 3) er==ination methods. widch cornetive assion is required shall be examined. Piping suppans to be evaminad shall be the suppens Also, abe====iaadaan shall be ***= dad to include of piping not - -atad under IWB-1220, !WC 1220, additional suppens within the systesa, equal la number IWD 1220, and IWE-1220. er2 7 - [-

,a - w CASE (continued) N-491-2 - o, - 3 2 2 ~ l 1111 :lj j'l ,!lill jhil 1 8 8 8 8 '111 l isizi:!:I III]{ ] aj jI j ! }l ii i jll id 'l s i I.!N r ,,5 5 si s I IIIII 5 5 I gf* lill l 3 1 ))4 1iii 2 I I, 11' iiii I i i 11 I ~ 1 1 1 1: i i 3 111ii1 1 i i i Ill il{ { I !!!.gl{i .I'i : 5 .1, l ] ... _... ~. _.

, FM-9-1G2 WeWJ METDEFRd h&. CASE (continued) N-491-2 cases oF Asus so lea AND FREssimE VEssFL CODE -2530 Method of Esaminatism (6) If a component support or a portion of a compo. "*nt suppat. has k evaluated a ese and data- %e mesods of a===iandon shall comply with those ."# " N I* I" I" ***"d'"'* "'" ."3112Xa). &c h may #wm canedve measmes in Table -25001. Alternadvs methods of examinaden meadng the requirements of IWA-2240 may be used. to restore the component support to its original design condition. De requirements of 2220 are not applicabic after corrective measures of -3112.2(a) are performed. (c) and upwts shall meet te #mmmu 3000 STANDARDS FOR EXAMINATION 'I #A#* EVALUATIONS -3100 EVALUATION OF EXAMINATION -3120 Insenice h=I=ah RESULTS -3121 General Inservice mondestructive *=aiaa-3114 Presenice h=s ela-a dons performed during or at the end of successive inspeedon intervals to meet the requirements of Table -3111 General The preservice *wa=*=admis per* -25001 and conducted in accordance with the proco-formed to meet the requirements of -2000 shall b8 dures of IWA-2200 shall be evaluated by comparing evaluated by comparing the e===taneiaa results with the results of examinations with the acceptance stan-acceptance standards sooedied in -H00. dards specited in -3400. -3112 Acceptanen 3122 Acceptance 3112.1 Acceptance by M=elam Compo- -3122.1 Acceptance by Erandmation. Compo-neat supports whose exarnisations do not reveal condi-nent supports whose examinadons do not reveal condi-tions described in M10(a) shall be acceptable for tions described in -3410(a) shall be acceptable for servios. condnued service. Verised changes or condidons from 3112.2 Acceptance by Correcties. Component Prim examinadoes shan be recorded in & supports whose examinadons reveal conditions de-with IWA 6220. scribed in -3410(a) shall be naampraw for service 3122.2 Acceptance by Correction. Cs p---" undt such condidons are corrected by one or more of supports whose examinations reveal conditions de-the foDowing: scribed is -3410(a) shall be unacceptable for continued (a) a(justment and reexanunation in accordance with service until such conditions are corrected by one or -2200 for condidons such as more of the following: (1) detached or loosened mechanical connections; (a) adjustment and reexamination in accesh wie (2) ' y.,r i bot or cold seatings of spring supports 2200 for conditions such as; e and constant load supports; (1) detached or loosened mechanical connections; j (3) 'a8aHea=-at of supporu; er (2) 1.i.r por hot or cold setdags of spring supporu o (4) improper displacement settings of guides and constant load supports; and stops. (3) misahgnment of supports; or (b) repair in accordance with IWA.4000 and reexami-(4) improper displacement settings of guides andom in accordance with -2200; and stops. (c) replacement in accordance with IWA 7000 and (b) repair in accordance wis !WA-4000 and reexami-reexandnation in accordance with 2200. nation in accerdancc with 2200; N (c) replacement in ecwid.i,64 with IWA 7000 and 3112.3 Accepisoce by Evaluaties er Test reexamination in accordance wim -2200. (s) As as alternative to the requirements of -3112.2' a component support er a portion of a component 3122.3 Acceptance by tion er Test support ecotaining relevant conditions that do not meet (a) As an alternative to the requirements of -3112.2. the acceptance standards of 3410 shall be acceptable a component support or a portion of a component o for service without corrective measwas if an evaluation h support containing relevant conditions that do not meet er sest demonstrates the component support is acceptable , the =,=--q standards of -3410 shall be acceptable for service. for continued service without corrective measures if an 674

CASE (continuesD N-491-2 ^ - cus. n. u a u m = =imavs m.co. r evaluados er east dancesinnes the component suppost 3400 ACCEPTANCE STANDARDS is accepenWo for dd h 3410 Aeosptamos Standards-C- ----- ^ (6) If a component support er a pordon of a compo-neat suppoet, has been evalented or tested and deser-mined to be accepentus for aandanad service in acoasd-(a)C, ^ support ocedidons which ase unac-anos widi 3122.3(a), the Owner may perfonn correedve septable for continued servios shall include da fol. snessures to restese the compensat support to its original lowing: design osodities. The :,_'. of 2220 se not (1) deformations or structural d -h of far appliceMe after onnecdvs measures of 3122.2(a) me isoars, springs, clamps, or other support laces; perfonned. (2) missing, W or loosened support items; . (c) Records and repons shall meet the seguireamss (3) are strikes, weld splaner, past scoring, of IwAaio00.

7. or general conosion on close tolerance me-chined or sliding surfaces; (4) improper hot or cold settings of spring supporm and constant load suppens; (51 misalisnment of suppens:

(6) improper clearances of guides and stops. (6) Except as de6and in (a) above, the following are examples of non-relevant condidnes: 3200 SNA1, EMATIOPts (1) fabdcation inada (e.g. fresa punching, layout, bending, rolling and==chtningF 8'va=landa== that detect conditions that seguire evain-(2) chipped or discolosed pales; ation la accordance with the g@ ^ of 3100 (J) weld splatter on other than close toleranos anay be suppla== sad by other====landa= methods machland or sliding surfaces; and techniques OWA-2000) to detannine the chancter (4) scratches and surface abrasion snarkr. of the tow (La sise, shape, and crimaradam) Visual (5) roughness or general conomica which does not

===i-ada-that dienot swface saw that exceed -3400 reduos dw load bearing especity of the suppen; criesria shall be a,,'--- 2 by either surface or (6) general conditions acceptable by the anatorial, volanstric examinations. Design, or Construction Specineadaan 4 TOTAL P.22 m in m sunmumi 4 mm -}}

v t e Letter Sequence Approval
TAC:MA5464, (Approved, Closed) TAC:MA5465, (Approved, Closed)
Initiation Request Acceptance... Administration Questions Answers Results Approval, Approval Other:
MONTHYEAR1999-06-03 [Table View]

ML20207E896

Text

SUBJECT:

Attachment:

SUBJECT:

Attachment:

SUMMARY

SUBJECT:

Attachment:

SUBJECT:

Attachment:

SUMMARY

=

Navigation menu

Search