ML20205P922
| ML20205P922 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 04/01/1999 |
| From: | Sorensen J NORTHERN STATES POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9904210032 | |
| Download: ML20205P922 (42) | |
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i Northern States Power Company Prairie Island Nuclear Generating Plant 1717 Nakonade Dr. East Welci . Minnesota 55089 Apnl i,1999 10 CFR Ped 50 Section 50.65a U S Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 PRAIRIE ISLAND NUCLEAR GENERATING PLANT Docket Nos.50-282 License Nos. DPR-42 50-306 DPR-60 Request for Relief No. 8 for the Unit 2 3rd 10-year Interval inservice Inspection Program On November 15,1994 we submitted for review our third 10-year Inservice Inspection Examination Plan for Unit 2 and, on April 19,1995, relief request revisions associated with that plan. The NRC issued its evaluation of the 3rd 10-year Interval Program Plan on February 22,1996.
The purpose of this letter is to submit a relief request for " limited examinations" associated with that plan. Attached is Unit 2 Relief Request No. 8, Revision 0 which addresses those limited examinations. We are requesting relief pursuant to 10 CFR Part 50, Section 50.55a(g)(5)(iii) due to the impracticality of obtaining "100%"
examination coverage for the affected items.
In this letter we have made no new Nuclear Regulatory Commission commitments. 1 Please contact Jack Leveille (651-388-1121, Ext. 4142) if you have any questions related to this letter.
~
oel P. Sorensen Site General Manager Prairie Island Nuclear Generating Plant j c:(see next page) Oi
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e USNRC NORTHERN STATES POWER COMPANY April 1,1999 Page 2 c: Regional Administrator - Region Ill, NRC Senior Resident inspector, NRC NRR Project Manager, NRC J E Silberg
Attachment:
ISI Relief Request No. 8 (Rev. 0) l l
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NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN
. ISI Relief Request No. 8 (Rev. 0)
Limited Examination SYSTEM: Various Class: 1 and 2 Category: Various item: Various impractical Examination Requirements:
ASME Section XI (1989 no addenda) Code requires full examination of inservice inspection (ISI) components per Table IWB-2500-1, and IWC-2500-1. Reg. Guide 1.147 endorses Code Case N-460, " Alternative Examination Coverage for Class 1 and Class 2 Welds." This code case allows greater than 90% coverage of a weld to meet the " essentially 100%" requirement.
NRC Information Notice 98-42 " Implementation of 10 CFR 50.55a(g) Inservice Inspection requirements" Dec.1,1998, states "The NRC has adopted and further refined the definition of "" essentially 100 percent"" to mean greater than 90 percent " in 10 CFR 50.55a(g)(6)(ii)(A)(2) for required examination coverage of reactor pressure vessel welds. This standard has been applied to all examination of welds or other areas required by ASME Section XI.
The Prairie Island construction permit was issued in 1967. This facility was designed and constructed with limited accessibility due to component configurations and/or physical barriers for which 100% coverage is not achievable on some ISI components examined for the Third Ten Year Interval.
l Basis for Relief:
The following 10 CFR 50.55a paragraphs apply to the inservice inspection of components in accordance with the ASME Section XI code:
50.55a(g)(1): For a boiling or pressurized water-cooled nuclear power facility whose construction permit was issued prior to January 1,1971, components (including supports) must meet the requirements of paragraphs (g) (4) and (5) of this section to the extent practical.
50.55a(g)(4): Throughout the service life of a boiling or pressurized water-cooled nuclear power facility, components (including supports) which are classified as ASME Code Class 1, Class 2, and Class 3 must meet the requirements, except design and access provisions and preservice examination requirements, set forth in Section XI of editions of the ASME Boiler and Pressure Vessel Code ... to the extent practical within the limitations of design, geometry and materials of construction of the components. ,
50.55a(g)(5)(iv): Where an examination requirement by the code or addenda is determined to be impractical by the licensee and is not included in the revised inservice inspection program as permitted by Page 1 of 40 u >
NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN paragraph (g)(4) of this section, the basis for this determination must be demonstrated to the satisfaction of the Commission ...
Prairie Island was designed and constructed prior to development of ASME XI and therefore design for inspectability and inspection coverage is not in many cases, sufficient to permit satisfying the current Code requirements. Limitations to inspections are primarily due to obstructions and interferences.
Summary of the limited examinations are described below and also included in Table 1.
Part A: Category B-A, " Pressure Retaining Welds in Reactor Vessel,"
Reactor Vessel Closure Head Weld (W-6): Volumetric coverage is limited to 58.70% . Inspection limited due to flange configuration prohibits UT exam from flange side and lifting lugs limit UT exam from head side for 17.5 inches. (See Figures 1 and 2)
Part B: Category B-F, " Pressure Retaining Dissimilar Metal Welds" Pressurizer Safety B Weld (W-1): Volumetric coverage limited to 78.00%. Joint configuration prevents UT scanning more than 1 inch on either side of weld.
(See figure 3).
Part C: Category B-G-1, " Pressure retaining Bolting , Greater Than 2 in. In diameter" Reactor Vessel Closure Head Nuts (RV Nuts 1-48): Surface examination coverage limited to 82.50%. Inside diameter of nut prohibits induction of two directional fields when utilizing yoke. (See Figure 4 and 5).
Part D: Catgory B-J," Pressure Retaining Welds in Piping" Reactor Coolant Loop A Weld (W-6/2LSU): Volumetric coverage limited to 29.50% Pump configuration prohibits UT examination down stream of weld centerline. (see Figure 6).
Accumulator discharge B Weld (W-6): Volumetric coverage is limited to 83.80%.
Joint configuration prohibits UT scanning from downstream side and vent line l prohibits UT scan from 39 inches to 1.5 inches of circumference. (See Figure 7). )
i Page 2 of 40 i
NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN Pressurizer Safety B Weld (W-2): Volumetric coverage is limited to 76.70%. Safe end configuration prohibits UT exam on upstream side. (See Figure 8).
Reactor Coolant Loop A Weld (W-5): Volumetric coverage is limited to 68.00%.
Nozzle geometry upstream of weld limits UT examination. (See Figure 9).
Reactor Coolant Loop A Weld (W-1): Volumetric coverage is limited to 47.90%.
Joint configuration prohibits UT scanning nozzle from side. (See Figure 10).
Reactor Coolant Loop B Weld (W-1): Volumetric coverage is limited to 84.00%.
No UT scan on upstream side of weld due to configuration. (see Figure 11).
Seal injection B Weld (W-12): Surface examination coverage is limited 50.00%.
Box restraint limits access from weld centerline to beyond exam area, upstream side. (See Figure 12).
Pressurizer Surge Weld (W-1): Volumetric coverage is limited to 87.00%. Two circumferential scan limitations at 90 degrees and 270 degrees for 12.7 inches due to hot leg and surge line configuration. (See Figures 13 and 14).
Reactor coolant system Drain down Weld (W-1): Volumetric coverage is limited to 60.00%. Joint configuration limits scan. (See Figure 15).
Part E: Category C-B, " Pressure Retaining Nozzle Welds in Vessels,"
Steam Generator #21 Nozzle (N-1): Volumetric coverage limited to 86.11%. UT scanning limitation due to nozzle configuration. (See Figure 16).
Part F: Category C-F-1," Pressure Retaining Welds in Austenitic Stainless Steel or High Alloy Piping" RHR Pump B suction Weld (W-20/LSU): Volumetric coverage is limited to 83.30%. Flange configuration prohibits UT exam on downstream side. (See Figure 17).
RHR Pump B suction Weld (W-21/LSD): Volumetric coverage is limited to 82.30%. Flange configuration prohibits UT exam on upstream side. (See Figure 18).
Page 3 of 40
NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN RHR Pump B suction Weld (W-19/LSD): Volumetric coverage is limited to 83.30%. Flange configuration prohibits UT exam on upstream side. (See Figure 19).
Reactor Vessel Safety injection Weld (W-6): Volumetric coverage is limited to 85.87%. UT exam limited to the pipe side and weld crown only due to pipe to valve configuration. (See Figure 20).
Reactor Vessel Safety injection Weld (W-1): Volumetric coverage is limited to 77.80%. Valve configuration prohibits scanning on valve. (See Figure 21).
Safety injection 21 Discharge Weld (W-7): Volumetric coverage is limited to 77.50%. Valve configuration prohibits UT scanning on valve. (See Figure 22).
Part G: Category C-F-2, " Pressure Retaining Welds in Carbon Steel or Low Alloy Steel Piping,"
Main Steam B Weld (W-27): Surface examination coverage is limited to 72.20%.
Component support prohibits examination of a portion of W-27. (See Figure 23).
Part H: Category F-A," Supports" & Category C-C " Integral attachments for Vessels, Piping, Pumps and Valves" Main Steam A Hanger (H-2): Surface examination coverage limited to 83.52%.
Examination limited to 76 inches of weld length due to configuration of restraint.
(See Figure 24).
Main Steam A Hanger (H-1): Surface examination coverage limited to 69.63%.
Examination limited to 188 inches of weld length out of 270 inches total due to configuration of restraint. (see Figure 25).
Main Steam A Hanger (H-3): Surface examination coverage limited to 85.97%.
Examination limited to 49 inches of weld length out of 57 inches total due to configuration of restraint. (See Figure 26).
Safety injection Pump #21 Hanger (H-3): Surface examination coverage limited to 75.40%. Configuration prohibits examining weld at base of support. (See Figure 27).
Page 4 of 40
NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN Safety injection Pump #21 Hanger (H-4): Surface examination coverage limited to 75.40%. Configuration prohibits examining weld at base of support. (See Figure 28).
Safety injection Pump #21 Hanger (H-2): Surface examination coverage limited i to 75.40%. Configuration prohibits examining weld at base of support. (See Figure 29). l Safety injection Pump #21 Hanger (H-1): Surface examination coverage limited to 75.40%. Configuration prohibits examining weld at base of support. (See Figure 30).
Additional Means of Establishina Intearity:
In addition, hydrostatic tests are performed during regular inspection intervals to ensure the piping system is capable of maintaining pressure integrity. System integrity is monitored continuously during normal operation by many direct and indirect methods, e.g., containment radiation monitoring, containment air monitoring, containment sump monitoring, containment temperature monitoring, etc.
Alternate Examination:
l The nature of the limitations have been noted on the ISI examination reports and are included in the ISI Outage Summary Report. NSP will continue to document the limitations.
All in-service inspection at Prairie Island Unit 2 have been done to the greatest extent practical. When limitation to required inspections are encountered M&SP procedure ISl-LTS-1 is applied which requires altemative examination techniques be considered, or applied to gain the maximum obtainable inspection coverage practical. In all of the above items identified this procedure was used and the maximum inspection coverage was achieved.
i Limitations are due to design, geometry, and materials of construction of the components or ALARA concerns. NSP will continue to utilize the most current techniques available for future examinations.
The Reactor Vessel Head Nuts (Part C: Category B-G-1 " Pressure Retaining Bolting greater than 2"in Diameter") requires surface examinations under 1989 ASME Code Sec. XI, Table IWB-2500-1, item B.6.10. Because of the limitation of examination methodology on the threaded region of the nuts, future examination on this item (RV Page 5 of 40
NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN Nuts (1-48) will be performed according to the requirements of 1992 ASME Code Sec.
XI, Table IWB 2500-1, item B 6.10, which requires a visual, VT-1 inspection of the surface area of the nuts.
l Page 6 of 40
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- f iA 1 1510 2,. 7< 7 ,,r. z . . , .
1,fie y,;w c ,3 4 f.nj * // s,g , l g a 2sC21.t/,p,,,/9729 3 , r*h*4 o~ts.ae=** %
~~*~~ s N Zaseos csas s (..c s 7Ts /tif*
l n s,t* /t.ts*> 7 175's / 4 7 4 4 ^9 '" } vapasss p /11sy s //*y* l f v r. ././ - // 8 f.7 7,./ # c 4*k idis4os soeN l 9 * 'y* v- l l l g \ 11sh N' w /t CG* 21t*
- K4,7 ,q aua ,m l
rr. 6)' . 9 9 rr , z r. as -4 3 6; sz,.14 2 r.v v- . s e.sx.:v ... , ,. . , T.es. ,
,9n, .
1 f r.* o J Sted A s4A s /91.2 %*e d s .s tr.sj o w+g;og e c s. /y1.J4, g, s 57 f 48, sue,:os a ssa e n1 4vea a v=sa eds. 4< d=<a /JZg,48
- IJ 7 .,
top 4.,. = a r. ;,e,,z ss. u , r.e .... u ..> = - rc .%, grw A4aa : r t. t.' e 1 - TL 9 ch tr4 A a e4
- r 77 s s. ss 9 g.,
Ce 4 44n it?0lmy 'fek de CM fof.1
% -ro**L .* a.sa e . . ua 1an.
I ttPot!# 97- Cli3 pf P.J[4 9 1 1 s Page 15 of 40
NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN Figure 6 (MP MATERMLS & SPECML PROCESSES INSERVICE INSPECTION NONDESTRUCTWE EXAMINATION PROCEDURE Limitation Data Sheet innial enarr report c 07 00G2 Procedure $ ISI-UT 1IAf r21 Iso s 2-ISI-32B tsern s W-e 9 Deect16on at Unitation PUMP cnNFIGURA TtoM PROHIBITA EXAMINATinN DOWHRTREAM OF WELD CENTFRt INF. , PJM ;- EL w i roaa l ; Sketch of Lirrvtshon Umantien temovst roquwemenen NONE - enMPA NEN T GEnMF TR Y PRFrL tlDFR AT TAINING /,DDITIONA L COVFRAGE. Radiaton te6d 50-GCmrArr i Page 16 of 40
NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN Figure 7 f6iP MATERIALS & SPECIAL PROCESSES INSERVICE INSPECTION . NONDESTRUCTIVE EXAMINATION 1998 PRAIRlE ISI.AND UNIT 2 OUTAGE Limitation Data Sheet incal E; tam Report No 98-0298 Procedure No. ISI-UT-16 (Rov.12) 60deg Exam Rpt No: 984299(A) ISO No. 2-151-22B ltem No. W-6 Descnption of Limrtacon: Joint configuration prohibits scanning from downstream side. Maximim coverage attained using 1-1/2 Vee Cal. Vent line at TDC prohibits scan i from 39.0" to 1.G". , Weld length =40.5". Sketch of Urnr*ation: q ven1line I ks.
?lOW m1 W-$
Urnitation removal requrements: None. Radiation field; 60-140mrlhr 1 l Page 17 of 40 i I
NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN 1 i i Figure 8 GSiP MATERIALS & SPECIAL PROCESSES l INSERVICE INSPECTION - NONDESTRUCTNE EXAMINATION PROCEDURE Limitation Data Sheet initial exam report s 9?-O/6S Procedure # /SI-U T-/6 /r //I l 150 0 2-l$l-30 R l tem 6 W-2 Descnption of Urnitation SA FE END CDNPIGUU A T/ON PDCHIp/ TS i EXA MINATION GN UPS TREAM SLOE. AXfA L CO VERA G E A TTAINED WITH I 1/2 vcf CXAM. .. 3
/
[ W 2 &*-2 AK i 2 's SAFE EtJD I,; l i d -.- __ .._ _ ELBOW flow Sketch of Limitation Limitation removal requrements N O N F Radiation field 3 0 - 5 O mr.+ r Page 18 of 40 f L
NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN I Figure 9 GEP MATERIALS & SPECIAL PROCESSES ! INSERVICE INSPECTION - NONDESTRUCTNE EXAMINATION 1998 PRAIRlE ISLAND UNIT 2 OUTAGE Limitation Data Sheet inmal Exam Report No: 98 0296 Procedure No ISI.UT 11 (Rov. 4) ISO No. 245132A ltem No. W4 Descripten of Lirnstabon: Nonle geometry upstream of weld. Sketch of Lignitation: G
. 'C:Le U,eL. ~
< ..- T,
. . .L . . . . . . . y ELECw l ten Limitation removal requirements:
None. l Radiation Acid: 2040mr/hr } i i 1 l l t Page 19 of 40 i i
NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN Figure 10 l M MATERIALS & SPECIAL PROCESSES INSERVICE INSPECTION . NCNDESTRUCDVE EXAMINATION PROCEDURE
- 1 Limitation Data Sheet '
inkal exam repor*. s 97-OO72 97-0073
- Prxea:.re >St.ur.II A (r 2 s ISO t 2 191-32R ltem s W-I Description of Limita$cn JOINT CONCIGURA TinN PROHIBITS' SCANNING FROM NQZ2L E SIDE . MA TERIAL CHARAC TER-IS TICS PREVEN T URING I //2 VEE CA L . *'.
t i r i _ _ _ ,I. _ _ _ ., s * ,
! l l w.
scale e I12 Sketch of Limhatien . Limitah remeval requirenwnts NONE, __ 1 Radiah neid 50-!20 mr/hr . Page 20 of 40
NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN Figure 11 G5iP MATERIALS & SPECIAL PROCESSES INSERVICEINSPECTION NONDESTRUCTNE EXAMINATION 1998 PRAIRIE ISLAND UNfT 2 OUTAGE Limitation Data Sheet Instal Exam Report No: 98-0287 Procedure No. ISI-UT 11 (Rev 4) ISO No. 2-ISl-33C flem No. W-1 Descripton of Limitatort No scan on upstream side of weld. Sketch of Limitation: tdC $ 2,1 " Onernas J
\ '
s s Raouceo 66*68 LLThation removal requirements: None. Raciaton field: <150mr/hr Page 21 of 40
i NORTHERN STATES POWER INSERVICE INSPECTION l PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN i l Figure 12 GFr) MATERIALS & SPECIAL PROCESSES INSERVICE INSPECTlON . NONDESTRUCTIVE EXAMINATION 1998 PRAIRIE ISLAND UNIT 2 OUTAGE Limitation Data Sheet Imtial Exam Report No. 98-0183(A) Proceduru No ISI.UT-16 (Rev.12) ISO No. 2-ISI.19 Item No. W-4 Desenpuon of Limitation. No sc.an 1,1S,25, due to reducor. Limited scans 2,3,4,3S,4S, for 3.5" cire, on elbow due to short radius. 3T Cal used and scan on weld to achieve code coverage for scan 1. Sketch of Lirnitation: 1V gls ~
\
M 4
/
' hjC
- 4+$
LWnitation removal requirements: None. Radiaton field: <150mrlhr i Page 22 of 40
NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN i Figure 13 UEiP MATERIALS & SPECIAL PROCESSES IN$ERVICE INSPECTION NONDESTRUCTIVE EXAMINATION 1995 PRAIRIE ISLAND UNIT 2 OUTAGE Limitation Data Sheet trut!al Exara Report No: 984069 Procedure No. ISI-UT 16 (Rev.12) ISO No. 24SI-31 Itern No. W-1 Desenption of Umitation: l Scan 2 was not performed due to weld configuration.100% of code volume was I achieved using a 45deg 11/2 Vee. Sketch of Limitation: 1 1
- W.,, . , ,,aw <*e cm *' * *W L I
l acr us l l l g I sontse u
;- ..\ l . ; I \l a f I_ s N 1 i
1.srutacon removal requirements: l None. I l Radiation fwd <25-50rnethe e l l l Page 23 of 40 L
r . NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN Figure 14 03HP MATERIALS & SPECIAL PROCESSES INSERVICE INSPECTION . NONDESTRUCTIVE EXAMINATION 1998 PRAIRIE ISLAND UNIT 2 OUTAGE Limitation Data Sheet initial Exam Repcrt Nc: 98-0059 Procedure No. ISI-UT.16 (Rev.12) ISO No. 2-153-31 Item No. W-1 Description of Lirnitation: Two Circ. scan limitations at 90deg and 270deg for 12.T' each due to hotleg and surge line configuration. Sketch of Urndation N
\ $b Wei LEb
$' war ta Wb A
N A/ Limitaten removal requirernents: None. Radiaten fleid: <25-50mr/hs <f l Page 24 of 40
NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN Figure 15 G2ip MATERIALS & SPECIAL PROCESSES INSERVICE INSPECT 10N . NONDESTRUCTIVE EXAMINAT10N 1998 PRAIRIE ISLAND UNIT 2 OUTAGE Limitation Data Sheet Inibal Exam Report No: 98-0202 Procedure No. ISI-UT-16 (Rev.12) Supplemental Exam Report No: 96-0203 ISO No 24SI-19 Item No W-1 Description of Limitation: Joint configuration: No scan 1, IS,28. Limited scana 2,3,4. 3T Cal ud and supplemental 60deg 2T exam performed to increase code coverage Sketch of Limitation:
$ca4 l SS g f /** I f
J.
, 4- 1 4,/{%
- I rWL< ] g:JV
/
ggow.eo slauC Lanitation removal requirements: None. Radiation neid: <150-300mrthr Page 25 of 40
( .
. i NORTHERN STATES POWER INSERVICE INSPECTION ]
PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN I , i l Figure 16 1 ( (MP MATERIALS & SPECIAL PROCESSES . ! INSERVICE INSPECTION - NONDESTRUCTIVE EXAMINATION l 1998 PRA!RIE ISLAND UNIT 2 OUTAGE i Limitation Data Sheet i Inmal Exam Report No: 98-0077 Procedure No. ISt 'JT-3 (Rev. 8) I l i ISO No. 2-ISl-37A ltem No. N-1 l Description of Limitation: l Scanning limitation due to nozzle configuration. Sketch of Limitation:
. m_
" '5" '
l l I w want. + l l \
\ / m maa.s 4 Limitation removal requirements:
Removal not possible. Radeten Held: s.Smrlhr .. l l l l Page 26 of 40 l I
NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN Figure 17 G5iP MATERIALS & SPECIAL PROCESSES INSERVICE INSPECTION . NONOESTRUCTNE EXAMINATION PROCEDURE
~
Limitation Data Sheet irstial exam report # 95 m/4 Procedure # /S/-UT-If Ir. S 1 tso s 2 -ISI-$ r stem s W-20 Descnp6on ot Limitation FL ANGE CONflG UQ A TION PDCHIRITR EJ A MINATION OH DNS TREA M SIDE A X t A L COVERAGE ACHIEVEO WI TH I 1/ 2 - VEE FX A M - 3
/sg j j I --* y l 2/1 '
4 b __ l - , a FL ANGE pipe Wr -- - -i- 3- _ _ _ rio, Sketch of Lirrwtaten Limitation removalrequirements N O N E
.- i Radiation fleid 2 -20 /n r/hr ,
Page 27 of 40
NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN l 1 i l Figure 18 G2ip MATERIALS & SPECIAL PROCESSES INSERVICE INSPECTION - NONDESTRUCTIVE EXAMINATION PROCEDURE Limitation Data Sheet initialexam teport # 95 0015 Procedure s !SI-U T-16 ie 11) ISO # 2-/S/- S / ltem # W.? / Desctletion ot Umitattu PL A NGE COMP!G U R A TIO N RRf v M T 9 EXA MIN ATION ON UPS TREAM SIDF AX(AL COVERAGE A CHIE VED WITH I //P VVF EX AM ' l l l 3 l/ '2 e = 1
"\
j .
' 4 i -
FL ANGE )II. . . . . ,/Kl REDUCER
~
flow Sketch of Umitation . Limitation removal requwements N O N E Radiation fleid 2-20 mr/hr , l Page 28 of 40
l NORTHERN STATES POWER INSERVICE INSPECTION ! PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN Figure 19 M MATERIALS & SPECIAL PROCESSES
, INSERVICE INSPECTION . NONDESTRUCTNE EXAMINATION PROCEDURE Limitation Data Sheet initist exa.m report # 95 0016 Procecure s ISI- U T-IG tr 91 ISO s 2 /SI-5/ Item s W /9 Descrtption of Umhtation FL A NGE C ONFIGIJR A TION P 9 0HIR!TR F/ A MIN A Tin N ON HO C TRF AM SID E. A YI AI COVCOAGE A CHIE VE D WITH I I/2 VES EXA M.
- 1 4 l
,/
N l-l N -2 3s 3
\
E FL A NG ,
'll b
flow ----,f \ fpg Sketch of Limitation Umita6on removal requirements NONE l Radiation Seld 2- 2Omr/hr Page 29 of 40 l
I ' NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN l l l Figure 20 , ! 1 g l [
.4 Ei? MATERIALS & SPECIAL PROCESSES I INSERVICE INSPECTION . NONDESTRUCTIVE EXAMINATION ,
t 1998 PRAIRIE ISLAND UNIT 2 OUTAGE - ( Limitation Data Sheet l Initial Exam Report No. 98-0219 Procedure No ISI-UT 16 (Rev.12) , j i ISO No. 2-1S1-70 item No. W-6 l Descnction of Lirnitation: Exam limited to the pipe side and weld crown only due to pipe-to-valve configuration. 85.87% code coverage achieved. Greater than 90% code coverage is not achievable with supplemental exams due to Circ. Scan limitation (00 configurathon). Sketch of Limitation: l l 'tS*> t YW
- w h n.r l
~( s I i f )
'] i\
s F~ f\[ Limitaten removal requirements: None. Radiaten field: <5mrlhr l i i Page 30 of 40 i j
1 NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN Figure 21 I fe9 MATERIALS & SPECIAL PROCESSES INSERVICE INSPECTION NONDESTRUCTIVE EXAMINATION PROCEDURE Limitation Data Sheet ; 1 indial enam report # 97 Ol?/ Procedure # (SI UTIR fr.III i l lSoi 2 - ISI.'P ttem s W-I Descnotion of Limitation VA LVF CONPiGURA TION PROHiQlTR EXAMINATION OM VALVE ECDY. ; AX/AL COVERAGE A T TAINED U TILIZING / //2 VEE EX AM ? l CIRC EXAM LIMITED TD SC ANNING ON WEL D CROWN A ND , EL B O W. - l E fh l
- n VALVE .
e 3
**~~t j 3s gLeow 4 4 m
I O elev view Sketch of Limitation Limdation removalrequirements NONE- MA Y/ MUM Radiation need /5 mr/hr Page 31 of 40
NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN Figure 22 GEP MATERIALS & SPECIAL PROCESSES INSERVICE INSPECTION . NONDESTRUCTIVE EXAMINAT10N 1998 PRAIRlE ISLAND UNIT 2 OUTAGE l Limitation Data Sheet initial Exam Report No: 94-4025 Procedure No. ISI.UT.16 (Rev.12) (For supplemental 60* see Rpt. 98 0026) ISO No. ISI.90A Item No. W.7 Desenption of Lrnitation:
- Valve configuration prohibits scanning on valve. Used 1% Vee calibration to
! maximize coverage for axial scans. Circ scan limited to scanning on weld crown i and elbow 74% coverage. Drain line on elbow from 6" to 8.7" limits scan 2 Wold length =14.5" minus 2.7 limit =11.5"i14.5" = 81% coverage. Sketch of Limitation. 1 i ' l 4
~
m: =- 2
/ l O
~T .4 4 ./ .,, 35 j m Q --t 45*
W . / .<.. . A / ,..,, 4 flow Limitation removal requirements: None. l Radiation field: <2mrlhr - l l l l Page 32 of 40
( - NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN i i Figure,23 l EEP MATERIALS & SPECIAL PROCESSES INSERVICE INSPECTION NONDESTRUCTIVE EXAMINATION PROCEDURE Limitation Data Sheet i Initsal exam report t 97 01G0 Procedure 8 f$l-M T-1 (v 21 ISO M 2 IRI-47R \ tem t W27 Descnption ct Limrtation CCMPONENT SilDorRT PRDHIBITS EX A MIN ATION OF A POR TION O' W 2 7. WGt D LENGTH 72" WEL D CROWAI WID TH = 2.0" L iklf TA TION L FNC TH = 20 S W 27 l I I
=
Sketch of Lirmtatum Umitation removal requirements DIS A SSEMB L E SUPP OO T Ann u,mue A e w rru ra; /mrana,,a.w .1st cauwm m rw
._ r a na--an;17uans r-um rw rar r>m / + / # n W. m e ns. e ze 2
%b raw car, A.ns me= wuaew uf Asistark m!W />>*
nmtion nesd < 2mr/hr l i l Page 33 of 40 L
r . i l* NORTHERN STATES POWER PRAIRIE ISLAND UNIT 2,3RD INTERVAL INSERVICE INSPECTION EXAMINATION PLAN l Figure 24 I i i G55P MATERIALS & SPECIAL PROCESSES j INSERVICE INSPECTION NONDESTRUCTIVE EXAMINATION ! 1998 PRAIRIE ISLAND UNIT 2 OUTAGE I Limitation Data Sheet ' In;tial Exam Report No: 98 0273 Procedure No. ISI-MT 1 (Rev. 9) l 150 No. 2 ISI 46A ltem No H-2 l i Desenption of Lrnitaten: 1 Exam limited to 76" weld length out of 91" total weld length due to configuration of I restraint. J Sketch of Limitation: i l
... _ j
.1 f
R 1
\
1 aumenthasa!!4Lst.F..jfi~r i I
. .. . . . M ,
)
l I i Limitation removal requirements: l None. Radiation 5 eld: <2mr/hr l 1 Page 34 of 40 i
NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN Figure 25 ZHP MATERIALS & SPECIAL PROCESSES INSERV!CE INSPECTION - NONDESTRUCTIVE EXAMINATION 1998 PRAIRIE ISLAND UNIT 2 OUTAGE Limitation Data Sheet instal Exam Report No; 96-0274 Procedure No. ISI-MT 1 (Rev.9) ISO No. 2-ISI-46A ltem No. H-1 Desenpeon of Limitation: Exam limited to 188" wid length out of 270" total wid length due to configuration of restraint. Sketch of Limaation:
..i 1 1 TW: L , a an = = ' 7" w Ax "Di l l
,,, s w\&n \ T 3'~
I Lsnitaten removal requirements: None. Radiation flew: <2mr/hr Page 35 of 40
NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN Figure 26 i GC.9 MATERIALS & SPECIAL PROCESSES j IN$ERVICE INSPECTION . NONDESTRUCTIVE EXAMINATION - i 1998 PRAIRIE ISLAND UNIT 2 OUTAGE Limitation Data Sheet inmal Exam Report No. 98473 Procedure No ISI-MT.1 (Rev,9) ISO No. 2-ISI 44A Item No. H-3 Description of Limdatorr Exam limited to 49" weld length out of 57" total weld Imgth due to configuration of restraint. Sketch of Limdation:
. ., . s l
h N \,*r
-:--s__c ..,
a 4-NNN(I%et?W.,.
?,M 'a l t
i Limdabon removal requirernents: None. Radiation fold; <2mr/hr i-l t l Page 36 of 40 i
- j.
- i NORTHERN STATES POWER INSERVICE INSPECTION
' PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN Figure 27 G2P MATERIALS & SPECIAL PROCESSES INSERVICE INSPECTION . NONDESTRUCTIVE EXAMINATX)N PROCEDURE f Limitation Data Sheet initial exam report # 98-00/G Procedure # /SI-M T-/ (r 9 /
ISO s 2-IS t-60 A stem s H-3
%Q o(Llmitation CO NFIGUR A T!n Al POCHIPITS FX A VINthtm Wrt n AT RARE of suppnot IIll
--- J INACCESSIBLE PORTION i
Sketch of Umitation Limaation removal requrements NONE Radiation fleid < 2mr/hr Page 37 of 40 i
I. i
~
NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN i Figure 28 M MATER!ALS & SPECIAL PROCESSES INSERVICE INSPECT)ON .MONCESTRUCTIVE EXAMINAT10N PROCEDURE
- Limitation Data Sheet Initial exam repcet # 96-001 7 Procedure # 15/ - M T- / fr. 9 /
IS0 0 2-ISI-6C A \ tern # H-4 Description cf Lmtation CO NFIGlJn A TIC A) PRCMI:!TC C/,1VINIMC wet n AT 9ARE 05 CrippnpT II Il ( j INACCESSIBLE PORTION Sketch cf Lirnitation Linvtation removat requirernents NONE Radiacon Seid 4. 2 mr/br I-1 Page 38 of 40
, 1 NORTHERN STATES POWER INSERVICE INSPECTION i PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN l
l Figure 29 LGiP MATERIALS & SPECIAL PROCESSES l INSERVICE INSPECTION . NONDESTRUCTIVE EXAMINATION PROCEDURE l l Limitation Data Sheet ; tr 6tial exam report s 9S 005i Procedure s lSI-M T-l (r 81 tso n 2-1Sl-60A stem e _ H-2 Descngtson of Llmitation CONFIGl1GA T10H PDnHLClTE SY Akt!NIN2 . WrL D A T 9ARE C5 RI)POnR T Il lI 0 _ 7 , INACCESSIBLE PORTION 1 1 i Sketch of umtadon l Lmtauen remeval requirements NONE Radiation Geld < Pmr/hr I Page 39 Of 40 l
r .. NORTHERN STATES POWER INSERVICE INSPECTION PRAIRIE ISLAND UNIT 2,3RD INTERVAL EXAMINATION PLAN l s-Figure 30 _. l tsp MATERIALS & SPECIAL PROCESSES INSERVICE INSPECTION . NONDESTRUCTIVE EXAMINATlON PROCEDURE l Limitation Data Sheet Instial exarn report c 95-DOS 2 Procedure s ISI- M T-1 (r e)
- Iso e 2-1Sl-60A Item s H-I Deecnption of Lkm6tation CONFIGURA TInM PDnHIPlTC SXAV!HIM2 Wft n AT G A SE Of RUPPOR T l
i t iI l k - d INACCESSIBLE POrtTION Sketch of Limitation Limaation removal requirements NONE Radiation fleid < 2mr/hr l Page 40 0f 40}}