ML16168A361

Revision 34 to Updated Safety Analysis Report, Section 12, Plant Structures and Shielding

ML16168A361
Person / Time
Site:	Prairie Island
Issue date:	06/03/2016
From:	Northern States Power Co, Xcel Energy
To:	Office of Nuclear Reactor Regulation
Shared Package
ML16168A332	List: L-PI-16-049, Revision 34 to Updated Safety Analysis Report, Appendix L, Requirement of Renewed Operating Licenses ML16168A330 ML16168A342 ML16168A344 ML16168A345 ML16168A346 ML16168A347 ML16168A348 ML16168A349 ML16168A350 ML16168A351 ML16168A352 ML16168A358 ML16168A360 ML16168A361 ML16168A362 ML16168A363 ML16168A364 ML16168A374 ML16168A375 ML16168A376 ML16168A377 ML16168A378 ML16168A379
References
L-PI-16-049
Download: ML16168A361 (314)

Text

0 ..... t-2. V1 V1 w ex: t-V1 Cl LLJ N ..... ...J a: Cl z 1. OWN T. ND...L.ER CHECI<ED 0 10 0.2 X £ \1 20 STRAIN, % 30 40 TYPICAL STRESS STRAIN CURVE STANDARD ASTM TENSILE TEST MATERIAL:304 STAINLESS STEEL TEMPERATURE 600° F DATE 6-23-99 SCALE* NONE t \1 CAD U12201.DGN NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT RED WING HDtESOTA FIGURE 12.2*1 REV. 18 FILE 5.0 4.5 4.0 <I) <I) w 3.5 0 ....1 w 3.0 "' 2.5 z "' t-z: 2.0 w "' t; 1.5 1.0 0.5 0 OWN T. MILLER CHECKED -3.5 DATE CAD FILE IS y =0.0 -2.5 6-23-99 U1222A.DGN

-1.5 -0.5 0 0.5 1.5 STRESS FROM AXIAL FORCE /YIELD STRESS MATERIAL:

SA 376 Tp 316 CROS5-SECTION:

HOLLOW-CIRCULAR HOOP STRESS: 0. 90 S y COMPARISON BElWEEN DESIGN AND COLLAPSE CONDITIONS NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT RfD WINC MINNE.'>OTA

5.0 COLLAPSE

CURVES 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 2.5 3.5 SCAlE: NONE FIGURE 12.2-2A REV. 18 5.0 4.5 4.0 ., ., 11.1 3.5 0 .... 11.1 3.0 t ii") 2.5 z w I-z ., 2.0 ., 11.1 Cr<! t;:; 1.5 1.0 0.5 0 OWN T. MILLER CHECKED -3.5 DATE CAD FILE IS y =0.0 -2.5 -1.5 Ul2202B.DGN

-0.5 EMERGENCY CONDITIONS 0 0.5 STRESS FROM AXIAL FORCE /YIELD STRESS .o'MTERIAL:

SA 376 Tp 316 CROSS-SECTION:

HOLLOW-CIRCULAR HOOP STRESS: 0.00 S y COMPARISON BElWEEN DESIGN AND COLLAPSE CONDITIONS NORTHES:N STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT RED WING MINNE.'>OTA

5.0 COLLAPSE

CURVE 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 1.5 2.5 3.5 SCALE: NONE FIGURE 12.2-28 REV. 18 OPEN A v SHELL / INTERNAL CONCRETE y / --,.---. . _,!>-r.,t 4 . . L TANGENT LINE <l a:: \ C'll ll. 'l 4 STIFFENERS .

..,._, <l PLACEMENT OF . <l INTERNAL

<I BLDG. <I 4 <I * <l <I <I * <I <l <I "' <I * . <I <I .... <I .. <I 4 <I 4 .

• • * * <I * <l EXTERNAL . * <I <I <I SUPPORT . <I CONCRETE 1:::]" <I <I 4 4 4 4 .Q 4 4 " -SHELl TRANSITION ZONE AND INTERNAl STIFFENERS DRAWN BY: VLSI DATE: 02-02-07 I I SCALE: NA I REVISION:

29 PAGE. NO. NA I CAD-FILE U12203.DGN I'

...... o.,.****or.."""'"'" "IJ'\J" I FIGURE 12.2*3 CAD FILE: J I CAD I PRII UBARS I U12203.DON

..,. CD 0 Ol CD 0 ..-0 OWN T. MILLER CHECKED SHIELD BLDG. 4 DATE T -RING GIRDER (REMOVED AFTER ACCEPTANCE PRESSURE TESTING) 4 . <l <I L.U <I c::: <I <l 4 4 4 <l 4 4 4 4 <l 4 4 4 <l <J 4 4 I I 4 I I I 4 I I SHELL INTERNAL CONCRETE 4

• 4 . 4 . ___________

[ _________________

_ TANGENT LINE JOINT 4 4 <l <l 4 PIPE COLUMN 4 CONCRETE 4 4 FILL 4 SUPPORT 4 TEMPORARY SUPPORT STRUCTURE NOirrHERN 5TATE5 POWER COMPANY NONE PRAIRIE ISLAND NUCLEAR GENERATING PLANT CAD FILE U12204.0GN RED WING MI NNE:.OTA FIGURE 12.2-4 REV. 18 OWN T. MILLER CHECKED DATE CAD FILE 6-23-99 U12206.DGN I iii M 42 61 80 62 43 2 305 23 86 3oK roo... 67 / ........ 48 I I I I /"'-. By \ \ 4"49' 45i-I I / /'......-29 47 \ 17'11/// 210 28 IIIII// 209 91 90 72 \

71 53 52 \ 'lf!IF1-(46 ° 29' 38") \Jf" 34 33 115 114 96 95 77 76 58 j z 57 39 38 20 19 MODEL FOR FINITE ELEMENT ANALYSIS OF DOME NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT RED WING In 00 0.:

• cr

• 0 @) In II In

• M a-0

• 00 N II J In

• N 0 N @) -o -X --SCALE: NONE FIGURE 12.2*6 REV. 18 1(2;: 218 217 Ill 247 It:;) 4n fr46 229 216 r215 231 1230 0: 228 200 199 -210-226 212 16al) 209 1207 193 12 191 0 190 80 79 164 163 Ill Q 1188 174 1 172 146 II 171 644)* 169 = 153 0 155 152 28 151 150 16 1B 1J4 @! Q2gl@ @I o9 Ill 133 7 it. 115 131 @ Ill 9R 97 114 96 o-113 112 ,..... @ 95 93 79 7R 77 0 @ @ @ 75 74 60 59 II 76 58 0 @ @ "' @) 57 ::J6 41 40 59 '() @ @ @ 38 37 J 22 21 20 @ ,-CD 19 llR-117 116 115 114 113 12 111 10 9 Ia 17 16 Is 4 I? 1 X MODEL FOR FINITE ELEMENT ANALYSIS OF DOME OWN T MILLER DATE NORTHERN STATES POWER COMPANY SCALE, NONE I CHECKED CAD PRAIRIE ISLAND NUCLEAR GENERATING PLANT FIGURE 12.2-7 REV. 18 FILE Ul227.DGN RED WING MI NNE.'>OTA OWN T. MILLER CHECKED DATE CAD FILE U12208.DGN z z X MODEL FOR FINITE ELEMENT ANALYSIS OF DOME NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT RED WING MINNE:.OTA SCALE: NONE FIGURE 12.2-8 REV. 18

. tw"OOE l Pellroo : . f'ltatOO(T) *. o. I I OWN T. HILLER

• PER.IOO * . -n. *a -*-.. ---. X'l"\.&.e.Tieo..l A.:.oo..I(S

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ANALYSIS OF DOME USING DYNAMIC VERSION OF SAP DATE SCALEa NONE CAD FILE U122M.DGN NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT RED HrnNNESOTA FIGURE 1 2.2-9A REV. 18 Vcoc:*'Z ........... r f i1 I *MOPE' Z ., I ..

OWN T, MILLER CHECKED oc-...ec:T,o-...

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ANALYSIS OF DOME USING DYNAMIC VERSION OF SAP DATE CAD FD...E 6-23-99 U1229B.OGN NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT RED WING MIHNESOT Ill SCAlEI NONE FIGURE 12.2-99 REV. 18 OWN T, MILLER CHECJ(£1) 1iCO.U!.Z 1*:. !10"-o r

• l'fiODE 10: .!I:. I . f"' : "94 OEFLECTION At.ON Go X2*

SC:.O.LIJ:

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I" * :0'-Q (COI!CWC:T,..y) r I "' ANALYSIS OF DOME USING DYNAMIC VERSION OF SAP DATE 6-23-99 SCALE! NONE . . .:x. CAD F1LE NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT RED WING HJNNESOTA FIGURE 12.2-9C REV. 18 OWN T

• MILLER CHECI<ED UQOE I ?I *.

• eEC .1 I-* ,':'1.. .

O.L.O"-'G -x;-X s::. ....

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ANALYSIS OF DOME USING DYNAMIC VERSION OF SAP DATE CAD FILE NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT RED WING HDI£SOTA SCALE* NONE FIGURE 1 2.2*9D REV. 18 OWN TAM CHECKED ----* . I> GROUT / " / .. _,-'/Jl.11!Q9". *ll!Q12'

• 111!:16'

• 11(013' I' 2_LAYEA lD TYPICAL SECTION FOR BASE SLAB & WALL (f) *111!:16'

_J w ;;= 0 0 1-z w co 1-1-z z c., w w 9 N co *9!Q12' c.o co -* 0 I 0 (f) (f) --_J :---_J

• w ..,.

• w 0 ;;= ;;= N 0 0 -0 0 -* DETAIL "A" SECTION OF BASE SLAB & WALL REINFORCEMENT DETAILS DATE 6-23-99 CAD FILE U12210,0GN NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT RED IIMl MINNESOTA SCALE* NONE FIGURE 12.2*1 0 REV. 18 I I I I I I OWN GEW CHECKED DATE CAD FILE U12211.DGN PLAN SHOWING ARRANGEMENT OF TOP REBARS PLAN SHOWING ARRANGEMENT OF BOTTOM REBARS PLAN OF BASE SLAB REINFORCEMENT DETAILS NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT RED WING MINNEoOTA 5CAI.E, NONE FIGURE 12.2-11 REV. 18 OWN GEW CHECKED DATE CAD FILE 4-#9 ADDL #4@12 "' i Ill ""' u ::::; a.. Ill 0 ""' 0 --J ""' -o i l CIO :;;; 0 m DENOTES #11 BARS WITH WELDED SPUCES 2'-6" DETAIL "B" SECTION OF DOME SLAB & WALL REINFORCEMENT DETAILS 4-17-0:l Ul2212.0GN NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT RED WING MINNESOTA SCALE* NONE FIGURE 12.2-12 REV. 25 OWN G'<W CHECKED DATE CAD FILE #9(cv12 #9(<4>18 #9((\118 PLAN SHOWING ARRANGEMENT OF TOP REBARS PLAN SHOWING ARRANGEMENT OF BOTIOM REBARS I I 8'-0" DIA. PLAN OF DOME SLAB & WALL REINFORCEMENT DETAILS NORTHERN STATES POWER. COMPANY 5CALE: NONE FIGURE 12.2-13 REV. 18 PRAIRIE ISLAND NUCLEAR GENERATING PLANT U12213.0GN REO WING OWN GEW CHECKED DATE CAD FILE Ul2214.DGN r , 7 I L{#9@12 O.F.} #6@12 I.F. {#9@9 O.F. #6@10 I.F. TYP. WALL REINF. ELEVATION (OUTSIDE VIEW) LARGE OPENING IN WALL (TYP. ARRGMT. OF REINF.) NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT RED WING MINNESOTA . SCALE. NONE FIGURE 12.2*14 REV. 18 OWN: LAB CHECKED: FORMING MATERIAL EXTERIOR FACE OF WALL CAULKING COMPOUND JOINT BETWEEN AUXILIARY BLDG.AND SHIELD BLDG.WALLS SEALING COMPOUND FORMING MATERIAL SHIELD BLDG. WALL TOP FINISHED FLOOR --11---...

J 1->---+---1

'/.o" JOINT JOINT BETWEEN AUXILIARY BLDG. SLAB AND SHIELD BLDG WALL DATE: CAD FILE: 8-11-15 Ul2215.DGN DETAILS FOR JOINTS BETWEEN REACTOR & AUXILIARY BUILDING WALL NORTliERN STATES POWER COMPANY SCALE: NONE (l Jfce1Erlflf9Y" t-------'-----1 PRAIRIE ISLAND NUCLEAR GENERATING PLANT FIGURE 12.2-15 REV. 34 REDWING MINNESOTA CD 10 ... ! ... 0 A=l0.7 V = Volume ft3 A = Area ft2 V=112,240 A=2.5 A=6.8 DOME v = 1,207,305 UNAMED COMPARTMENTS ARE PIPE ANNULI A=12.2 A=513 VOLUME AND FLOW PATH SCHEMATIC OF REACTOR CAVITY REGION OWN GEW CHECKED DATE CAD FILE U12216.DGN NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT RED WING MINNESOTA SCALE: NONE FIGURE 12.2-16 REV. 18 OWN GEW CHECKED DATE CAD FILE #ll(HORIZ.)

1. ll(VERT.)

TYPICAL STIRRUP DETAIL IN WALLS 3'-2" #ll(HORIZ.)

1. ll(VERT.)

SECTION A-A PLAN VIEW AND SECTION OF WALL SEGMENT SHOWING STIRRUP (,..23-99 Ul2217.DGN NORTHERN 5TATE5 POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT RfD WING MINNESOTA SCALE: NONE FIGURE 12.2-17 REV. 18

• *..

• il I t f t I I.YIO --*o ... __ !__ , ... r_ ... i -*: . -;; ; I -*. :'!. t .. -... .. -...

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.......... , ...... \*-.... , ....... , . ::..:.* .. _ = : : ..

----_. _ -=---*1: . "'!I '**-* ! ._;., E ------i e ' .,. ,_, . .. ."!' --,; ,:. " . :a ** ':. .... .. v

• E ... ... . *' '!' *-.. --- ;. . " ' ;. -' ...... .:. .. . : ... .. * ----."t--------PLAN VIEW OF STRUCTURAL MODEL OF STEAM GENERATOR COMPARTMENT (HEIGHT 68 FT.) ---/. :;-;-. ------.:Y.J OWN T. MILLER DATE 6-23-99 NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT RED WING MINNESOTA SCALEa NONE CICEO CAD FILE Ul2218.DGH FIGURE 12.2*18 REV. 18 OWN GEW CHECKED . . . CONTAINMENT VESSEL REFUELING FLOOR OPERATING FLOOR MISSLE MEZZANINE FLOOR & R.C. PUMP COMPARTMENT REFUELING POOL . . .. . . , l"J I ::0 N * <;> Co -o * :? c;; REACTOR VESSEL CAVITY COMPARTMENT STEAM GENERATOR AND REACTOR CAVITY COMPARTMENT CONFIGURATION-SECTION DATE CAD FILE 6-2::1-99 U12219.DGN NORTHERN POWER COMPANY NONE PRAIRIE ISLAND NUCLEAR GENERATING PLANT RED WING MINNE!iOTA FIGURE 12.2-19 REV. 18 I / I I I ')( * .. NOTES: OWN T

• HILLER CHECJ<ED 1. Inside Face: 2. Outside Face: 3. axx,ayy ,azz : Facing Steam Generator and Reactor Coolant Pump. Opposite of Inside Face of Wall. Positive for Tension and Negative for Compression.

X y Global Coordinate System STRESS OUTPUT FOR THREE DIMENSIONAL BRICK ELEMENT IN LOCAL COORDINATE SYSTEM DATE CAD FIL£ 6-23-99 U12220.0GN NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT RED WING MINNE:SOTA SCAL.Ea NONE FIGURE 12.2-20 REV. 18 l"'"c;"' bAAt.S) ,.,.

..... a UOQIZONTAL 5EC:TIOU ---

TO EL. 71o

--** r<?6 (WOOP e,.o.25} ,.,.

\ . \'.

SEL:TIOlJ 1="120U TO 7'2 9 """' GEW Jo..n 6-23-99 OIQoiFICNfr NO. OtECKED GIOUP ..oJOCT "() . ETNSUR REVISIONS .WO

• CBT. REACTOR VESSEL BIOLOGICAL SHEILD TYPICAL REINFORCING CAD "" U12221.DGN NORTHERN STATES POWER COMPANY 1CA1.E NONE PRAIRJE ISLAND NUCLEAR GENERATING PLANT RED -.c:i, MINNESOTA FIGURE 12.2-21 REV. 18 OWN GEW CHECKED STRUCTURAL TE HORIZONTAL TIE BRACING WELDED TO BAND RING DATE <.AD FILE 6-23-99 U12222.DGN COLUMN CAP PLATE AND BRACING GUSSET VENTI LA TED SUPPORT PADS (AIR SUPPLY AND DISCHARGE DUCT SYSTEM NOT SHOWN) EMBEDDED STRUCTURAL STEEL COLUMNS (CONCRETE EMBEDMENT EMBEDDED COLUMN BASE PLATE AND ANCHOR BOllJ!l REACTOR VESSEL SUPPORTS NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT REO WING MINNESOTA . ,. .. -----*----

AIR FLOW SCALE NONE FIGURE 12.2-22 REV. 18 OWN GEW CHECKED (3) TIE BARS -----' DATE CAD FILE 6-23-99 Ul222J.DGN REACTOR COOLANT PUMP SUPPORTS NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT RED WING STRUCTURAL STEEL COLUMNS SCALE: NONE FIGURE 12.2.23 REV. 18 OWN GEW CHECKED *[> l>. p/::.l> .. . . [> *-4as* TlB BIOLOGICAL SHIELD WALL *11 D TlB *4 n a 41 *

• A1 (0 *uas* I .. N BENT *11a5* BENT *4 U a INTERIOR WALL TYPICAL FLOOR SECTION *4 n STIRRUPS *a7 BENT * * . . * * * * * *

• __.f"' I 1*11 CBENT7 -*4 ...... -3 u STIRRUPs!

I

• 3 U STIRRUPS DATE CAD FILE SECTION A-A CONCRETE BEAM FLOOR (TYPICAL ARRANGEMENT OF REINFORCEMENT)

G-23-99 Ul2224.0GN NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT REO WING MINNESOTA SCALE: NONE FIGURE 12.2-24 REV. 18 OWN GEW CHECKED DATE CAD FILE 6-23-99 TYP. ARRGMNT. OF STIRRUPS ENCLOSURE WALLS FOR STEAM GENERATOR AND REACTOR COOLANT PUMP (TYPICAL PLAN OF REINFORCEMENT) 4 STIRRUPS NORTHERN STATES POWER COMPANY SCALE: NONE U12225.DGN PRAIRIE ISLAND NUCLEAR GENERATING PLANT 1:£0 WI NG MINNE:.OTA FIGURE 12.2*25 REV. 18 OWN GEW CHECKfD HYDRAULIC BUMPER PAD (3) BUMPER BLOCK (4) LOWER LATERAL SUPPORT GIRDER DATE CAD FILE Ul222G.DON CABLE RESTRAINTS UPPER LATERAL RING SUPPORT GIRDER STEAM GENERATOR COMPARTMENT BUMPER PEDESTAL (6) STEAM GENERATOR SUPPORTS NORTHERN STATES POWER COMPANY STRUCTURAL STEEL COLUMNS SCALE: NONE PRAIRIE ISLAND NUCLEAR GENERATING PLANT FIGURE 12.2-26 REV. 18 lfD WING MIN N ESOTA OWN GEW CHECKED DATE CAD FILE lll2227.DGN PRESSURIZER SUPPORT NORTHERN STATES POWER COMPANY SCALE* NONE FIGURE 12.2-27 REV. 18 PRAIRIE ISLAND NUCLEAR GENERATING PLANT lEO WI NG MINNE:.OTA OWN GEW CHECKED DATE CAD FILE . . .. . .. :* *.*.* . * ! ... . . .. ANCHO;/ BOLT CONTROL ROOM EQUIPMENT NSS CONTROL PANEL SUPPORTS G-H-99 NORTHERN STATES POWER COMPANY NONE FILLET WELD PLUG WELD Ul2228.DGN PRAIRIE ISLAND NUCLEAR GENERATING PLANT IUD WING FIGURE 12.2*28 REV. 18

. , . .

FRAME WELDED TO .A-----BASE PLATES ._*** .. . . . . . . . J.. . . .-.... _ .. -* * * . * * *, ...:t. . . . ... CONTROL ROOM EQUIPMENT MOUNTING FOR PROCESS CONTROL RADIATION MONITOR AND NIS CONTROL PANELS OWN T. Hn.LER DATE 6-23-99 NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT RED WING MINNESOTA SCALE* NONE CHECKED CAD FILE U12229.ooN FIGURE 12.2.29 REV. 18 OWN GEW CHECKED I .........

"" , I SELF-DRILLING PHILLIPS REDHEAD TYPE S48 SWITCHGEAR MOUNTING DETAILS DATE CAD FILE U12nl.DGN NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT R!O WING MINNESOTA NONE FIGURE 12.2-31 REV. 18 OWN GFW CHECKED DATE CAD FILE 6-23-99 U12232.DGN

' ...... ' .... I PLUG WELD ANCHOR BOLTS SWITCHGEAR MOUNTING DETAILS NORTHERN I'OWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT RED WING MINNESOTA SCALE: NONE FIGURE 12.2-32 REV. 18

OWN GEW CHECKED DAle CAD FILE CASE I U12234.DGN DIRECTION OF HQUAKE <JL--C> AIRLOCK EFFECT OF AIR LOCK ON SEISMIC ANALYSIS NORTHERN STATES POWER PFIAIRIE ISLAND NUCLEAR OENERATINO PLANT 1m) 'MNCJ MINN!!OTA.

CASE II SHELL REV.18 c \ \ ... \ 1\ \ \ \ ,.., (I) 0::: \ <t LLJ ... ' \ N _J 1\\ <I: > 0::: LLJ .... fi3 I-i '\ z ...... z CD \ 0 i\\ ...... I-u CD LLJ ... Q.. (I) z ...... N ' ... " c LIJ LIJ Q.. (I) 0::: CD LIJ c > LIJ 0 LIJ z 0.. C) en ...... en 0 LIJ ... z c ...... z ;:..: z 0 ;:::) N 0::: -c I I I .... 9 c ... I c ... ... I I I I I I I I I&J I&J I&J LIJ I&J LIJ I&J -... ... ... -... ...

PROBABILITY OF TURBINE RUPTURE DUE TO STRESS CORROSION OWN TAM DATE 6-2a-99 NORTHERN STATES POWER COMPANY SCALE: NONE I PRAIRIE ISLAND NUCLEAR GENERATING PLANT CHECKED CAD FIGURE 12.2-38 REV. 18 FILE U12230.DGN RED WING MINNESOTA