ML033350343

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Framatome Anp, Inc. Document 31-5029337-02, Examination of Reactor Vessel (Rv) Head Degradation at Davis Besse, Figures 3.5.6 - 5.3
ML033350343
Person / Time
Site: Davis Besse Cleveland Electric icon.png
Issue date: 11/30/2003
From: Hour K, Hyres J
BWXT Services
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
1140-025-02-24 31-5029337-02
Download: ML033350343 (31)
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Text

BWXT SERVICES, INC. 1140-025 02-24 72 BWXT SERVICES, INC. 1140-025-02-24 72 Clad Profile - Bottom Surface 4.21 14

-0.16

-0.18

-0.2

-0.22 y -0.24

-0.26

-0.28

-0.3

-0.32

-0.34

-2

,Q, X 2 Figure 3.5.6: Colorized representation of bottom surface of cladding (RCS side).

Red area denotes area of maximum deflection.

5

.. X~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

BWXT SERVICES, INC. 1140-025-02-24 73 0O 30" 0.29" 0.28" U I026 0.27" 0.25" 0 24" U 0.23" 0.22" 0.21i 0 20" U

Figure 3.5.7: Exposed cladding surface with superimposed colorized thickness data.

The thinnest areas of cladding occurred adjacent to the J-groove weld toward the 90° (0.202") and 270° (0.208") locations. U U

U U

U

U U

BWXT SERVICES, INC. 1140-025-02-24 74 U

U U

U U

U U

Figure 3.6.1: Photograph showing crack in exposed cladding in deflected region. U Red dot indicates (0, 0) coordinates for thickness measurements.

U U

U U

U U

BWXT SERVICES, INC. 1140-025-02-24 75 Figure 3.6.2: Mosaic showing cracking in exposed cladding. 2X

BWXT SERVICES, INC. 1 140-025-02-24 76 BWXT SERVICES, INC. 1140-025-02-24 76 Figure 3.6.3: Higher magnification view of cladding crack in bulged region. -4X

BWXT SERVICES, INC. 1 140-025-02-24 77 BWXT SERVICES, INC. 1140-025-02-24 77 Figure 3.6.4: Higher magnification photograph of crack near center bulge. 25X

BWXT SERVICES, INC. 1140-025-02-24 78 BWXT SERVICES, INC. 1140-025-02-24 78 Figure 3.6.5: Low magnification photograph of the cavity underside. The red circle shows the area of maximum deflection. The white dots were applied at Davis-Besse for the UT thickness measurements. The two parallel lines toward the left indicate the Nozzle 11 position, which is outside the photo on the left. This maximum bulging area is shown at higher magnification in the next figure.

BWXT SERVICES, INC. 1140-025-02-24 79 BWXT SERVICES, INC. 1140-025-02-24 79 Figure 3.6.6: Higher magnification photographs of cavity underside in area of maximum deflection. No cracks were observed in this area.

BWXT SERVICES, INC. 1 140-025-02-24 80 Top view of J-groove weld crack near 100. -. 4X Figure 3.6.7: Photographs showing axial crack in nozzle #3 J-groove weld near 10°.

BWXT SERVICES, INC. 1140-025-02-24 81 BWXT SERVICES, INC. 1140-025-02-24 81 Figure 3.6.8: Axial cracks located on J-groove weld bore near 1800. 0.75X

BWXT SERVICES, INC. 1140-025-02-24 82 BWXT SERVICES, INC. 1140-025-02-24 82 LOOuUMI9 LuWa[uraIu -U.;7A Figure 3.6.9: Low magnification photographs of cavity sidewall.

BWXT SERVICES, INC. 1140-025-02-24 83 BWXT SERVICES, INC. 1140-025-02-24 83 Figure3.6.10: Highermagnification photographs taken nearthe nozzle#3 bore.

BWXT SERVICES, INC. 1140-025-02-24 84 Figure 3.6.11: Photographs showing the cavity sidewall near 2700 (top) and looking up at the cavity nose (bottom).

BWXT SERVICES, INC. 1140-025-02-24 85 S s A Xr ES , a, e # U AS' okX ail /i ' _ r qr Ma S

<Inkin ;Sm J 'is<,

' t _ 5 M i.*' 4/

  • f E .4 S =

,,,..liN 6

,,C..0< ,SME,, l w . - w it. no, t Atn k our 4 =° lay l w - l *_ _

Figure 3.6.12: Photographs showing undercut regions of cavity near 300 (top) and 3150 (bottom).

p C031

BWXT SERVICES, INC. 1140-025-02-24 86 Pc.1 _

o.5".I Pc.B2 SS Cd I 0.25T Side View I Weld 28 . 22 5AP C . PcB2C1 L t.+PC.62C283 Direction 2.25-'

I PC.B2A ,-- -- -- - -- -- - --- Pc.02B

/~~ ~ ~~~~~~~~~~~

_-*TP.2C2B3t

/ t Pc.82C2A * -B C2122

.- :PCB2C2tal Top View of Pc.B2 I - 3.5" 12.5" Section Line - - -

Orawig not to Scale Figure 4.1.1: Schematic showing section locations and sample identifications for Block "B".

BWXT SERVICES, INC. 1140-025-02-24 87 Polished Surface I  ! ! ,  ! ', X' Pc.B2C2B3

~~~~~~~~Pc.B2C2B2 i Pc.B2C2 Top View Pc.B2C2B1 I ~~~~~~~~~~~~~~i; Low Alloy Stool O.75-i_.._........._......_.._.._.._.._.._..iI Specimen B2C2A2 -

J- e-@@-......................

Specimen B2C2AI - SS Clad l_.._._........ ...... ..... ..... _.

Pc.B2C2 Side View I1Z I

-3.0" - + 0.5"H-Weld Direction Section Liic - - - -

EDM Section -*-

Drawing not to Scale Figure 4.1.2: Schematic showing tensile specimen locations. The polished surface of piece B2C2B3 (met sample) is also indicated.

BWXT SERVICES, INC. 1140-025-02-24 88 BWXT SERVICES, INC. 1140-025-02-24 88 Figure 4.2.1: Macro photograph of Sample B2C2B3 showing the low alloy steel stainless steel interface and various grain structures within the low alloy steel HAZ.

BWXT SERVICES, INC. 1 140-025-02-24 89 BWXT SERVICES, INC. 1140-025-02-24 89 Figure 4.2.2: Typical low alloy steel microstructures near bond. 2% nital

BWXT SERVICES, INC. 1140-025-02-24 90 BWXT SERVICES, INC. 1140-025-02-24 90 Figure 4.2.3: Typical low alloy steel microstructures 1/4" from bond. 2% nital

BWXT SERVICES, INC. 1 140-025-02-24 91 1140-025-02-24 91 BWXT SERVICES, INC.

Figure 4.2.4: Typical low alloy steel microstructures -1/2" from bond. 2% nital

BWXT SERVICES, INC. 1140-025-02-24 92 1' r= . *-r .- *.. V

".5.

..-i.. 3 ,.....* *

5. -

V..

  • 4--- -%

PS V 33 (45VV IV

. 5..# tJ*. *

  • =.*-

I OOX 0* * . . -. . . Si

  • 4 V 90 I d.

a

- .V5.Z*t 43

- '55. -

-.5-

.3

.-0 1

55

.fs-- -

  • S * , . 4' I . -.. *.%*

.. f* - Si. J . . -

4. .4 .- . .

I

  • I * *i..-' N... .

- L) 1** '4

- /44 .44 4,

--4.

1

(.5 375X Figure 4.2.5: Typical cladding microstructures near bond.

(Acetic-nitric-hydrochloric etch)

BWXT SERVICES, INC. 1140-025-02 24 93 1140-025-02-24 93 BWXT SERVICES, INC.

Figure 4.2.6: Typical cladding microstructures away from bond.

(Acetic-nitric-hydrochloric etch)

BWXT SERVICES, INC. 1140-025-02-24 94 BWXT SERVICES, INC. 1140-025-02-24 94 Knoop Hardness (500 gram) 350.0 -

300.0-

= 250.0 c200.0- Al i 150.0-0 Stainless Clad Low Alloy Steel

,, 100.0 -

50.0 -

0.0 - l l l 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 Distance, inches

.6 w It oy" teel 4o Figure 4.2.7: Microhardness data and low magnification photograph for Sample B2C2B3.

BWXT SERVICES, INC. 1140-025-02-24 95 1140-025-02-24 95 BWXT SERVICES, INC.

Figure 4.3.1: Tensile specimen design (dummy test specimen shown).

BWXT SERVICES, INC. 1 140-025-02-24 96 Tensile Test Comparison 60

_50 -

t 40 a)

"O 30 C

CD 20 -

101 0

0 5 10 15 20 25 30 35 Engineering Strain (%)

l-B2C2A1 -B2C2A2 B2C2A1 B2C2A2 UTS 54,800 psi 57,100 psi 2% Offset YS 30,500 psi 31,300 psi Elongation 28.7% 28.7%

Reduction in Area 39.3% 34.3%

Figure 4.3.2: Tensile test results for specimen B2C2A1 (near RCS) and specimen B2C2A2 (near low alloy steel).

C-3g

BWXT SERVICES, INC. 1140-025-02-24 97

m~~~~~t m~~-.
  • ~

~C?' ~.'i"' -~~ --

~~ i ~ ~ ~~ *

  • T - -J r ip e Specimen :C2A1 -1.8X Specimen B2C2A2 1.8X Figure 4.3.3: Low magnification photographs of tensile specimens after test.

BWXT SERVICES, INC. 1140-025-02-24 98

. :. " I .--1-, .1II "'

B2C2A1 5X

.t1.-,

I,-ti.,- ..1.'.7 1I.

I

-, %,I

1. , ,

E C . a v S.. a.; .'

  • r* - .. ~ +> I 1 . A

!. ~; -, : Ks ' , ,

B2C2A2 5X Figure 4.3.4: Higher magnification photographs showing fracture location of tensile specimens.

BWXT SERVICES, INC. 1140-025-02-24 99 Table 5.1: Sample identification listing for Piece A2A.

Sample Location Test Plan Met SEM A2A1 A2A section at -2250 No plan l A2A2 A2A section at -170°-1 900 Axial cracks at -1800, see 1 Table 5-2 A2A3 A2A section at -1350 No plan -

A2A4 A2A section at -240-350° No plan -

A2A5 A2A section at -900 Thin area of clad at 900 (met), see Table 5.3 1 Axial crack at 10°; 4 (2 open A2A6 A2A section at -3500-700 circ. cracks at 20-450, see 4 cracks, 2 Table 5.4 through Table 5.10 mounts)

A2A section, contains Clad cracks; undercut regions, 6 4 (2 open A

lA7 exposed clad see Tables 5.11 and 5.12 cmounts)

A2A8 A2A8 A2A section, contains cavity nose No plan --

A2B l Trimmed comer No plan

p p

BWXT SERVICES, INC. 1140-025-02-24 100 p

p p

p p

p p

p Figure 5.1: Sectioning of Piece A2A (lower portion of cavity) showing new sample identifications.

p p

p p

p p

C9J

BWXT SERVICES, INC. 1140-025-02-24 101 Table 5.2: Sample identification listing for Piece A2A2.

PieceID Location Test Plan ] Met [SEM p

A2A2A Upper portion of nozzle #3 No plan bore A2A2131 Lower portion of nozzle 0 #3 No plan- - p bore at -190 A2A2B2 Lower portion of nozzle #3 No plan bore -1800 p

Contains axial cracks at 180° Met sample A2A2133 in the J-groove weld. through axial 1 in the J-groove weld. cracks p

A2A2B4 Lower portion or nozzle #3 No plan bore at -1700 p

p p

p p

p p

p Figure 5.2: Sectioning of Piece A2A2, looking at the ID of the J-groove weld bore.

p p

BWXT SERVICES, INC. 1140-025-02-24 102 Table 5.3: Sample identification listing for Piece A2A5.

Piece ID F Location Test Plan Met SEM A2A5A RV head near 900 No plan -- --

A2A5B RV head clad near 900 No plan -- --

Thin region of Met sample A2A5C clad near 900 through 1 --

l 2AlC thin region A2A5D J-groove weld and No plan -- --

clad near 900 p

p p

p p

p p

Figure 5.3: Piece A2A5 before sectioning. The mounted surface is indicated.

p p

p

'Lq-3

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