ML17277B340

Requests Approval to Use Portions of Later Addenda of ASME Section XI Requirements Re Selection & Exam of Class 2 Piping (Category CF Only) for Inservice Insp Program. Proposed Code Case Encl

ML17277B340
Person / Time
Site:	Columbia
Issue date:	03/20/1984
From:	Sorensen G WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	Schwencer A Office of Nuclear Reactor Regulation
References
GO2-84-156, NUDOCS 8403270118
Download: ML17277B340 (17)

Text

REGULATORY 1@ORNATION DISTRIBUTION SYSl (RIDS1 ACCESSION NBR:8003270110 DOC,DATE: 80/03/20 tlOTARIIED: NO DOCKET ¹ FAGIL:50 397 HPPSS Nuclear Pr ojectr Unit 2i ltrashington Public Powe 05000397 AUTH ~ NAME -

AUTHOR AFFILIATION SORENSENiG>>C, Nashington Public Power Supply System RECIP ~ NAME RECIPIENT AFFILIATION SCHNENGER¹A>> Licensing Branch 2

SUBJECT:

Requests approval to use portions of later addenda of XI requirements re selection 8 exam of Class 2 ASM'ection piping (Category CF only) for inservice- insp program, Proposed code case encl.

DISTRIBUTION CODE: Bools COPIES RECEIYEO:LTR ENCL SIZE:

TITLE: Licensing Submittal: PSAR/FSAR Amdts 8 Related Correspondence NOTES:

RECIPIENT COPIES RECIPIENT COPIES IO CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL NRR/OL/ADL 1 0 NRR LB2 BC '1 0.

NRR LB2 I A 1 0 AULUCKrR~ 01 1 INTERNAL: ELD/HOS2 1 0 IE FILE 1- 1 IE/DEPER/EPB 36 3 IE/DEPER/IRB 35 1 1¹ I E/DQAS IP/QAB21 1 NRR/DE/AEAB 1 0 NRR/OE/CEB 11 1 1 NRR/DE/EHEB 1 1 NRR/OE/EQB 13 2 NRR/DE/GB 28 2 2' NRR/OE/MEB 16 1 1 NRR/DE/MTEB 17 NRR/DE/SAB 24 NRR/DE/SGEB 25 1 NRR/DHFS/HFEB40 1

1 1

NRR/OHFS/LQB 1,1>>

NRR/DHFS/PSRB 1 32'RR/Dl./SSPB 1 0 NRR/DSI/AEB 26 1 1 NRR/DSI/ASB 1 1 NRR/DSI/CPB 10 1 1 NRR/DS I/CSB 09 1 1 NRR/OS I/ICSB 16 1 1 NRR/DSI/METB 12 1 1 NRR/OS I/PS B 19 1 1 NR 8 22 1 1 NRR/DSI/RSB,23 1 1 G FIL 04 1 1 RGN5 3 R ~ I/MI8 1 0 EXTFRNAL: ACRS 41 6 6 BNL(AMDTS ONLY) 1 1 DMB/DSS (AMOTS) 1 1 FEMA~REP OIV 39 1 1 LPDR 03 1 NRC POR 02 1 NSIC 05 1 1 NTIS 1 1 TOTAL NUMBER OF COPIES REQUIRED>> L'TTR 53 ENCL 46

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Washington Public Power Supply System P.O. Box 968 3000 George Washington Way Richland, Washington 99352 (509) 372-5000 8403270'B 05000397 840320 March 20, 1984 PDR ADOCK G02-84-156 8 PDR Docket No. 50-397 Director of Nuclear Reactor Regulation Attention: Mr. A. Schwencer Chief Licensing Branch No. 2 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Subject:

NUCLEAR PLANT NO. 2 USE OF PORTIONS OF LATER ADDENDA OF ASME SECTION XI EXAMINATION OF CLASS 2 SYSTEMS The Supply System requests Nuclear Regulatory Commission approval to use paragraphs IWC1220, 1221 and 1222 and Table IWC2500, Category CF from the 1983 Edition, with Addenda through Winter 1983 (W83) of the ASME Boiler and Pressure Vessel Code,Section XI (attached). The require-ments will be used for selection and examination of Class 2 piping (Category CF only) for the WNP-2 Inservice Inspection program. These requirements will be used in lieu of the mandatory requirements which according to 10CFR50.55a are ASME Section XI 1980 Edition, with Addenda through Winter 1980. For Emergency Core Cooling and Residual Heat Removal System, the mandatory Code is the 1974 Edition, with Addenda through Summer 1975.

The W-83 Addendum has not yet been referenced in 10CFR50.55a(b) as an approved Code. Therefore, specific approval is required to use the W-83 provisions.

The above paragraphs of Section XI (W-83) have been incorporated into a Code Case which is currently in the approval cycle. In February, this proposed Code Case passed ASME Subcommittee XI. However, we expect it to take another 6-12 months for it to be approved by the ASME Main Committee and be referenced in NRC Regulatory Guide 1. 147. This schedule will not allow use of this Code Case by the Supply System for the WNP-2 Inservice Inspection Program.

1$

Mr. A. Schwencer Page Two EXAMINATION OF CLASS 2 SYSTEMS The W-83 Addendum differs from W-80 as follows:

o Selection criteria is based on more of a random sampling of a smaller percentage of welds in a larger number of systems and portions of systems.

o A volumetric and surface examination is required instead of a surface examination only.

It is expected that the NRC will approve the use of the applicable paragraphs of Section XI, 1983 Edition (annotated on the proposed Code Case - attached). The NRC representative on Subcommittee XI voted affirmation on this action on February 2, 1984.

Your prompt approval is requested to support the submittal of the WNP-2 Inservice Inspection Program, scheduled for March 31, 1984.

Very truly yours, Mr. G. C. Sorensen, Manager

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Regul atory Programs TFH:shm Attachment cc: R. Auluck NRC M. Humm - NRC W. Chin - BPA A. Toth - NRC, Site

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Proposed Code Case Alternative Rules for Examination of Class 2 Piping Inquiry: 'hen determining the components subject to examination and estab-

'ishing examination requirements for Class 2 piping under Section XI Division 1, what alternative exemptions to those stated in IMC - 1220 and what alternative examination requirements to those stated in IMC

-2500 Cateaory CF, may be used?

Reply: It is the opinion of the committee that the following rules may be used for determining components subject to examination and establish-ing examination requirements for Class 2 piping under Section XI Division 1:

1. The following components (or par)s of components) of RHR, ECC and CHR systems (or portions of systems) are exempt from the volumetric and c2+~ I+Au'rface examination requirements of IMC-2500:

(Eddy /2 2/) -(a.) Vessels, piping, pumps, valves and other components NPS 4 and smaller in all systems except high pressure safety injection systems of pr'essurized water reactor plants. /

(b) Vessels, piping, pumps, valves and other components NPS 14 and smaller in high pressure safety injection systems of pressurized water reactor plants.

(c) Component connecti'ons NPS 4 and smaller (including nozzles, socket fittings, and other connections) in vessels, piping, pumps, valves and other components of any size in all systems except. high pressure safety injection systems of pressurized water reactor plants.

(d) Component connections NPS 14 and smaller (including nozzles, socket fittings, and other connections) in vessels, piping, pumps, valves and other components of any size in high pressure safety injection systems of pressurized water reactor plants.

, and ystems are t e Residual Heat Removal, Emergency Core Cooling, and Containment Heat Removal Systems, respectively.

(e) Vessels, piping, pumps, valves, other components and component connections of any size in statically pre~surized, passive (i.e., no pumps) safety injection systems of pressurized water reactor plants.

(f) Piping and other components of any size beyond the last shutoff valve in open ended portions of systems that do3not contain water during normal plant operating conditions.

2. The following components (or parts of components) of systems (or portions (gpss-]22~$ f systems) other than RHR, ECC and CHR Systems are exempt from the volumetric and surface examination requirements of IWC-2500:

(a) Vessels, piping, pumps, valves and other components NPS 4 and smaller.

(b) Component connections NPS 4 and smaller (including nozzles, socket fittings, and other connections) in vessels, piping, pumps, valves and other components of any size.

(c) Vessels, piping, pumps, valves, other components and component connections of any size in systems or portions of sytems that ~

operate (when the system function is required) at pressure equal or less than 275 psig and at a temperature equal to or less

'o than 200'F. ~ % i ~ s ~

(d) Piping and other components of any size beyond the last shutoff valve in open ended portions of systems that do3not.contain water during normal plant operating conditions.

3. For welds in austenitic stainless steel or high alloy piping the require-ments of attached Table 1 Examination Category CF-1 Pressure Retaining Welds in Austenitic Stainless Steel of High Alloy Piping shall be used as an alternative to the requirements of Table IWC-2500-1 Examination Category C-F, Pressure Retaining Welds in Piping.

'LS<<11yp surized water i*d,p i f yi i reactor plants are typically called y<< fp by such names as:

Accumulator tank and associated system Safety injection tank and associated system Core flooding tank and associated system

3. Normal plant operating conditions include reactor startup, operation at power, hot standby, and reactor cooldown to cold shutdown condi-tions, but do not include test conditions.

(e) Vessels, piping, pumps, valves, other components and component connections of any size in statically pre~surized, passive (i.e., no pumps) safety injection systems of pressurized water reactor plants.

(f) Piping and other components of any size beyond the last shutoff valve in open ended portions of systems that do3not contain water during normal plant operating conditions.

2. The following components (or parts of components) of systems (or portions g-lggtgf systems) other than RHR, ECC and CHR Systems are exempt from the volumetric and surface examination requirements of IWC-2500:

(a) Vessels, piping, pumps, valves and other components NPS 4 and smaller.

(b) Component connections NPS 4 and smaller (including nozzles, socket fittings., and other connections) in vessels, piping, pumps, valves:

and other components of any size.

(c) Vessels, piping, pumps, valves, other components and component connections of any size in systems or portions of sytems that operate (when the system function is required) at pressure equal to or less than 275 psig and at a temperature equal to or less than 200'F.

(d) Piping and other components of any size beyond the last shutoff valve in open ended portions of systems that do3not.contain water during normal plant operating conditions.

3. For welds in austenitic stainless steel or high alloy piping the require-ments of attached Table 1 Examination Category CF-1 Pressure Retaining in Austenitic Stainless Steel of High Alloy Piping shall be used Welds as an alternative to the requirements of Table IWC-2500-1 Examination Category C-F, Pressure Retaining Welds in Piping.

~14p'd,p' l I surized water reactor plants are typically called by such fp names as:

Accumulator tank and associated system Safety injection tank and associated system Core flooding tank and associated system

3. Normal plant operating conditions include reactor startup, operation at power, hot standby, and reactor cooldown to cold shutdown condi-tions, but do not include test conditions.

4. For welds in carbon and low alloy. steel piping. The requirements of attached Table 2, Examination Category CF-2, Pressure Retaining Welds in Carbon and Low Alloy Steel Piping shall be used as an alternative to the requirements of Table INC-2500-1, Examination Category CF, Pressure Retaining fields in Piping.

5. The examination requirements of Figures 1 and 2 shall apply to all surface and volumetric examinations including piping less than 4-in thick.

6. The examination requirements for pipe branch connections provided in Figures IWC-2500-9 through IWC-2500-13 of the 1983 Edition of Section XI shall apply to pipe branch connections HPS 2 and larger.

A 1icabil it This case is applicable to Section XI Editions beginning with the 1974 Edition and through the 1983 Addenda.

A lication Justification Inservice Inspection Requirements for Class 2 Systems were fi rst included in the 1974 Edition. The provisions of this case will not be issued as part of the code until the Winter 1984 Addenda.

W83 TABLE IWC-2500-1 (CONT'D)

EXAMINATION CATEGORIES CATEGORY C-F-l, PRESSURE RETAINING WELOS IN AUSTENITIC STAINLESS STEEL OR HIGH ALLOY PIPING tnp Item Examined'xamination Requirements l Examination Acceplance Examination'XAMINATION Examination

gib No. Parts Fig. No.& Method Standard(p Extent of C5.10 Piping Welds ~% in. Nominal Wall Thickness for Piping > NPS 4 C5.11 Circumferential Weld I WC-2500-7 Surface and I WC-3514 100% of each weld requiring Each inspection volupnetric examination interval C5.12 Longitudinal Weld I WC-2500.7 Surface and I WC-3514 2.5t at the intersecting Each inspection volumetric circumferential weld interval C5.20 Piping Welds ) '/s in. Nominal Wall Thickness for Piping R NPS 2 and < NPS 4 C5.21 Circumferential Weld I WC-2500.7 Surface and I WC-3514, 100% of each weld requiring Each inspection volumetric examination interval C5.22 Longitudinal Weld I WC-2500-7 Surface and I WC-3514 2.5t at the intersecting Each inspection voiumelric circumferential weld interval C5.30 Socket Welds I WC-2500-7 Surface I WC-3514 100% of each weld requiring Each inspection examination interval C5.40 Pipe Branch Connections of Branch Piping a NPS2 U C5.41 Circumferential Weld IWC-2500-9 to Surface I WC-3514 100% of each weld requiring Each inspection

-13, inclusive examination interval C5.42 Longitudinal Weld I WC-2500-12 Surface I WC-3514 2.5t at the intersecting Each inspection 0 and -13 circumferential weld interval NOTES:

(1) Requirements for examination of weids in piping N NPS 4 apply to PWR high pressure safety injection systems in accordance with the exemption criteria ofgg~))x > z"h/4 +<>e- . gA/s cctse (2) The welds selected for examination shall include 7.5%, but no ess than 28 welds, of all austenitic stainless steel or high alloy welds not QIW Cd ~exempted b - (some we(ds not exempted by ~ are not reguired tobe norssestruxttretyexamined per Exantination category C-F-1. The welds, however, shall be included in the total weld count to which tlbc 7.5% sampling rate is applied.) The examinations shall be distributed as follows:

(a) the examinations shall be distributed among the Class 2 systems prorated, to tie degree practicable, on the number of nonexempt austenitic stainless steel or high alloy welds in each syslem (i.erp if a system contains 30% of thc nonexempt welds, tlx:n 30% of the nondestructive examinations required by Examination Calegory C-F-1 should be pcrfornef on t tet syslem);

(b) within a system, the examinations shall be distributed among terminal endsi see Note (3)j and structural discontinuitiesjsee Note (4)j prorated, to the degree practicable, on tfbe number of nonexempt terminal ends and structural discontinuities in that system; and (c) within each system, examinations shall be distributed between line sizes prorated to thc degree practicable.

(3) Terminal ends are the extremities of piping runs that connect to structures, components (such as vessels, pumps, valves), or pipe anchors, each of vdhich acts as a rigid restraint or provides at least two degrees of trar>slationai restraint lo piping thermal expansion. (Xt (4) struclural discontinuities include pipe weld joints to vessel nozzlcs, valve bodies, pig(up casings, pipe fiUings (such as cllpows, tccs, rcduccrs, flanges, etc., conforming to ANSI Bl(p.9), and pipe branch connections and fittings.

0 (5) The welds selected for examination slatl be reexamined during subsequent inspection intervals over the service lifetime of the piping component. O Q pty(ry c s(nt yrdrz dn ceb mpPryxtcc<tast'm ty s ybeymm 1 sp y It(ps(. yyp dmm6yny Q lYiyrfcr l><slAr+

W83 ~pgz + g TABLE <WC-2500-1 <CONT'Dy EXAMINATION CATEGORIES EXAMINATIONCATEGORY C-F-1, PRESSURE RETAINING WELDS IN AUSTENITIC STAINLESS STEEL OR HIGH ALLOY PIPING Examination Item Requirements I Examination Acceptance No. Parts Fig. No.& Met)rod Standard& Extent of Examination*

Examined'iping Examination'ach C5.10 Wejds a % in. Nominal Wall Thickness for Piping > NPS 4 C5.11 Circumferential Weld I WC-2500-7 Surface and I WC-3514 100% of each weld requiring inspeclion volu<netric examination interval C5.12 Longitudinal Weld I WC-2500-7 Surface mxf I WC.3514 2.5t al tl>> intersecting Each inspection volomelric circumferential weld interval C5.20 Piping Welds > '/s in.,Nominal Wall Thickness for Piping a NPS 2 and ( NPS 4 C5.21 Circumferential Weld I WC-2500-7 Surface and I WC-3514 100% of each weld requiring Each inspection volun>>tric examination interval C5.22 Longitudinal Weld I WC-2500-7 Srrrface and I WC-3514 2.5r at the intersecting Each inspeclion volumelric circumferential weld interval C5.30 Socket Welds I WC-2500-7 Surface I WC-3514 100% of each weld requiring Eaclr inspection examination interval C5.40 Pcpe Branch Connections of Branch Piping a NPS2 C5.41 C(rcumferential Weld IWC-2500-9 to Surface I WC-3514 100% of each weld requiring Each inspection

-13, inclusive examhatlon interval C5.42 Longitudinal Weld I WC-2500-12 Surface I WC-3514 2.5r at tl>> intersecting Each inspection and -13 circumferential weld interval NOTES:

(1) Requirements for examination of welds in piping x NPS 4 apply to PWR high pressure safely injection systems in accordance with lhe exemptforr criteria o(Q~M~ fh/S r-"<>0- . )"Ais 0, d$

Tl>> vdefds selected for examination shall include 7.5%, but no ess than 28 welds, of all austenitic stainless steel or high alloy welds not 8'2)

Qfs Ce c~exenpicdb - idonreneldsnosexearpsedby - arenoirca i xssobcuordcssrusdrelyexatriudper<xnarinaiioncaiedory C-F-1. Tl>> welds, however, slall be included in the total weld count to which ll>> 7.5% sampling rate is applied.) Tl>> examinalions stall be dislributed as follows:

(a) ll>> examinations stall be distribuled among lhe Class 2 systems prorated, to tl>> degree practicable, on tl>> number of nonexempt austenitic stainless steel or high alloy welds in each system (i.e., if a system corrtains 30% of ll>> nonexempt welds, ll>>n 30% of U>>

nondestructive examirations required by Examiralion Category C-F-1 slrould be perforn>>d on tlat syslenr);

(b) within a system, tl>> examinations shall be distributed among terminal eels I see Note (3)I and slruclural discontinuities I see Note (4) I prorated, to tl>> degree practicable, on tt>> number of nonexempt ternrinal ends mal structural discontinuilies in tlat system; and

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(c) within each system, examinations slall be distributed between line sizes prorated to ll>> degree practicable.

(3) Terminal ends are the extremilies of piping runs tlat co<acct lo structures, components (such as vessels, penps, valves), or pipe anclrors, each of which acts as a rigid restraint or provides at least two degrees of translalional restraint lo piping ll>>mal expansion.

(4) Structural disconlinuities inchxle pipe wel(l joints to vessel rrozztcs, valve tpo<ties, pu<rrp c;<birr<@, pil>> fittings (suet< as cltpsrbvs, teL>, red<Kcls, llanges, etc., conforming to ANSI B)6.9), arel pipe branch con<>>ctions mxi fittings.

(5) Tl>> welds selecled for exanrinalion slall be reexamined during subsequerrt hrspeclion intervals over ll>> service lifetin>> of the piphrg component.

9 I=flu("C cfog(4r'4 oO QcC CpfancC ~7+Wc a' refer to /ltaXZ rrl ~r.(:4jpfgy /9I'SA~

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W8 TABLE lWC-2500-1 CATEGO (CONT'AMINATION EXAMINATIONCATEGORY C.F-2, PRESSURE RETAINING WELOS IN CARBON DNO LOW ALLOY STEEL PIPING I lent Exaolloed'xamination Requiremeotsl Exantioatioo Acceplaoce Frequency o(

No. Parts Fig. No. > Metled Staafard Ex(ent of Examfnation2 5 Examination'5.50 Piping Welds ~ B/B in. Nominal Wall Thicklless for Piping > NPS 4 C5.51 Circuo1lere>>tial Weld I WC-2500.7 Sul filCe iux) I WC-3514 100% of each weld requiriog Each instx:ctioo volumetric exao1IIlatl 011 interval C5.52 Longitudinal Weld I WC-2500-7 Surface alxl I WC-3514 2.52 at tile intersecting Each inspLction volun1ctrlc circulnferentlal weld interval 5.60 Piping Welds > '/, in. Nominal Wall Thickness for Piping R NPS 2 and ( NPS 4 C5.6) Circumferential Weld I WC-2500.7 Surface aal I WC-3514 100% of each weld requiring Each inspection voluotelric exaottoation Interval C5.t 2 Longitudinal Weld I WC-2500-7 Surface and I WC.3514 2.5t at the intersecting Each inspection volunletric circumferential weld Interval C5.70 Socket Welds I WC-2500-7 Surface I WC-3514 100% of each weld requiring Each iospeclion examination interval C5.80 Pipe Branch Connections of Branch Piping R NPS2 C5.81 Circtxoferentfal Weld I WC.2500-9 to Surface I WC-3514 100% of each weld requiring Each inspeclion

-13, inclusive examination interval C5.82 Longitudinal Weld ) WC.2500.12 Surface I WC.3514 2.52 at the intersecting Each inspection and -13 circumferential weld interval NOTES:

(1) Requirements for examination of weids in piping < NPS 4 apply to PWR high pressure safety injcclioo systems io accordance wilh tile th]s exemption criteriao@g322Dr~ this ( Ey s C. jhis ccrc <

(2) The welds selected for examination shaN Include 7.5%, but no ess ()lan 28 welds, of all

~ (Some wetds oot exeo>pled by .122 Ce.t'4 o&

'r~alloy LOVL) e not required to be noafestructivcly examined per Examination Category welds not C-F4 These welds, I'".vever, shall be included in tlvf total weld count to which Ilx. 7.5% saolpliog rate is applied.) Tile examinations shall be distributed as fotiovs:

(a) the yam tfons shall be dgtlibuted among tile class 2 systems prorated, to the degree practicable, on the number of nonexempt

~teel or(ug(Nolioy welds in each systeoT (l.e., if a system contains 30% of the nonexempt welds, then 30% of the oondestructive exaodnattoos required by Examination Calegory C-F~IToutd be perfornTed on tlat systeoT);

(b) within a system, tIT. examinations shall be distributed among terminal eals I see Note (3) J aal structural discontinuities I see Note (4) I prorated, lo the degee pracllcable, on the nuolber of nonexempt terminal ends alxl structural discooliralities in that system; olid (c) within each ystem, Examinations shall be distributed between line shes prorated to the degree praclicable.

(3) Terminal eals are the extrenitles of piping runs that connect to structures, coro pooeots (such as vessels, puolps, valves), or pipe anchors, each of which acts as a rigid reskatnt or provides at least two degrees of translational restraint to piping thermal expansion.

(4) Structural disconlinuities flcfude pfpe weld joints to vessel oonles, valve bodies, prnop casings, pipe fittings (such as etoows, 'tees, reducers, flanges, etc., conforming 0 ANSI 816.9), and pipe branch cosu1ectlons and filtings.

(5) 'The welds selected for 'Tminatton shall be reexamined during subsequenl iospeCIIon intervals over tlx.'ervice lifetime of the piping component.

(6) For welds in car@' steels, only those weids slewing reportable preservice transverse ialications reed to be examined for transverse reftec(2

~AWi~r~iyc Etre a s ding.

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WB TABLE IWC-2500-1 CATEGO (CONT'AMINATION EXAMINATIONCATEGORY C.F.2, PRESSURE RETAINING WELDS IN CARBON f)NO LOW ALLOY STEEL PIPING Examination Item Requirementsl Examination Acceptance Frequency of No. Parts Fig. No. ~ Method Standard Extent of Examination'4 Examined'iping Examination'ach GS.50 Welds R /z in. Nominal Wall Thickness

)

for Piping NPS 4 C&51 Circumferential Weld I WC-2500-7 Surface arrd I WC-3514 100% of each weld requiring inspection volumetric examination interval C5.52 Longiludinal Weld I WC-2500-7 Surface arxl I WC-3514 2.5r at tire intersecting Each inspection volumetric circumferential weld interval JC

'"5.60 Piping Welds > '/s in. Nominal Wall Thickrress for Piping R NPS 2 and ( NPS 4 C5)61 Circumferential Weld I WC-2500-7 Surface and I WC-3514 100% of each weld requiring Each inspection volumetric examination interval C5.e 2 Longitudinal Weld I WC-2500-7 Surface and I WC-3514 2.5r at the intersecting Each inspection volumetric circumferential weld interval C5.70 Socket Welds I WC-2500-7 Surface I WC-3514 100% of each weld reqmrrng Each inspectiorr examination interval C5.80 Pipe Branch Connections of Branch Piping R NPS2 C5.81 Circrxnferential'Weld I WC-2500-9 to Surface I WC-3514 100% of each weld requiring Each inspection

-13, inclusive examination interval C5.82 Longitudinal Weld I WC-2500-12 Surface I WC-3514 2.5r at the intersecting Each inspection and -13 circumferential weld interval NOTES:

(1) Requirements for examination of welds in piping < NpS 4 apply to pWR high pressure safety injeclion systems in accordance with the exemption criteriaof(Qg;~t ghgS gya'r., /fjtq r.-ps' Co,rbo~ '

(2) The weids selectedkr'examination shall include 7.5%, but no css than 28 welds, of all orhigh alloy welds not ph')s +~exempt (Some welds not exempted by -122 e not required to be nondestructively examined per Examination Category C-F4 These wclds, IC".xever, shall be included in tlrrr total weld count to which tire 7.5% sampling rate is applied.) Tire examinations slrall hatt'kexaminations be distributed as followers:

(a) tire pfrmigation's shall be dj'tributed among tire Class 2 systems prorated, to tire degree practicable, on the number of nonexempt arrsterrrIWQ~xmteel or ffj@altoy welds in each system (i.e., if a system contains 30% of the nonexempt welds, tlren 30% of the nondestructive ejrrnrinations required by Examination Category C-F~hould be performed on tlat system);

(b) wilhin a system shall be distributed among terminal ends I see Note (3)I and structural discontinuities I see Note (4) I prorated, to the derf ee praclicable, on the number of nonexempt terminal ends arxf structural discontinuities in that system; and (c) within each systerrt,,')xaminations shall be distributed between line sizes prorated to the degree practicable.

(3) Terminal ends are the extrenities of piping runs that connect to structures, components (such as vessels, pumps, valves), or pipe anchors, each of which acts as a rigid nsvafnt or provides at least two degrees of translational restraint to piping tlrernral expansion.

(4) structural discontinuities Irclude pipe weld joints to vessel nozzles, valve bodies, punrp casings, pipe fittings (such as eloows, tees, reducers, (6) For welds in carbi transverse ref lectr flanges, etc., conforming tt'ANSI 816.9), and pipe branch connections and fittings.

(5) The welds selected for. ~q'ination shall be reexamined during subsequent inspection intervals over tire service lifetime of the piping component.

steels, only ttrose welds showing reportable prescrvice transverse indications need to be examined for

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