ML033350349

Framatome Anp, Inc. Document 31-5029337-02, Examination of Reactor Vessel (Rv) Head Degradation at Davis Besse, Figures 5.3 - 6.1.1.1

ML033350349
Person / Time
Site:	Davis Besse
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: ML033350349 (16)

Text

BWXT SERVICES, INC. 1 140-025-02-24 103 BWXT SERVICES, INC. 1140-025-02-24 103 Figure 5.3 (cont.): Piece A2A5 after sectioning, looking down on the front face of previous photo. The mounted surface on sample A2A5C is indicated. This area contained the thinnest measured cladding (0.202").

BWXT SERVICES, INC. 1140-025-02-24 104 Table 5.4: Sample identification listing for Piece A2A6.

Piece ID l Location Test Plan ] Met J SEM U

A2A6A1 RV head near 900 No plan -- --

I 2A6A2 Lower portion of Contains lower U l (see below) J-groove weld and clad from portion of axial 3 2 (see below) crack at -1 00 and2 3500l700 circ cracks (0°o45°)

A2A6B Upper portion of Contains upper U (see below) J-groove weld from 350-700 portion of axial 1 2

__ ______ ______ crack at_-1 0 _ __

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U Figure 5.4: Piece A2A6 was first sectioned into Pieces A2A6A and A2A6B. Piece A2A6A was further sectioned into Pieces A2A6A1 and A2A6A2. Both cuts were U made on the same plane, parallel to the paper. The first cut line is partially visible; Piece A2A6B is the upper portion of the weld. The second cut line between Pieces A2A6A1 and A2A6A2 is obscured by Piece A2A6A.

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BWXT SERVICES, INC. 1 140-025-02-24 105 BWXT SERVICES, INC. 1140-025-02-24 105 Table 5.5: Sample identification listing for Piece A2A6B.

E Piece ID Location Test Plan Met SEM A2A6B1 Upper portion of J-groove No plan -

weld at -350° Nopa___

A2A6B2 Upper portion of J-groove Lower surface weld axial crack at -100 mounted for _ 1_3 A2A6B3 Mid portion of J-groove weld Open crack axial crack at -100 SEM sample 1 A2A6B4 Upper portion of J-groove No plan =

-1 weld from 300-700 Figure 5.5: Piece A2A6B after sectioning. The bottom surface of mounted. The axial crack in A2A6B3 was opened up for SEM.

p BWXT SERVICES, INC. 1140-025-02-24 106 Table 5.6: Sample identification listing for Piece A2A6A2.

Piece ID Location Test Plan Met SEM p

A2A6A2A Lower portion of J-groove No plan --

weld and clad at -700 p

A2A6A2B Lower portion of J-groove Contains circ crack 1 weld and clad at -450 near 450 A2A6A2C Lower portion of J-groove Open circ crack --

weld and clad at -300 sample for SEM A2A6A2D Lower portion of J-groove Contains circ crack 1 1 weld and clad at -200 near 20° A2A6A2E Lower portion of J-groove crack and circ1 A2A6A2E lLweld and clad at -10g cracksan =

A2A6AF Lower portion of J-groove No plan --

weld and clad at -0 p

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Figure 5.6: Piece A2A6A2 after sectioning. Additional sections were made on A2A6A2B, -C, -D, and -E. Refer to the following four tables and figures.

BWXT SERVICES, INC. 1 140-025-02-24 107 BWXT SERVICES, INC. 1140-025-02-24 107 Table 5.7: Sample identification listing for Piece A2A6A2B.

l Piece ID Location Test Plan Met SEM A2A6A2B1 Lower portion of J-grooveNopa weld at 450 (includes bore) No plan _ ll A2A6A2B2 Lower portion of J-groove Contains circ crack 1 l_________ ] weld and clad at -45° near 45° A2A6A2B3 Clad at -45' No plan -

Figure 5.7: Piece A2A6A2B after sectioning (side view of Figure 5.6).

The top surface of A2A6A2B2 was mounted.

BWXT SERVICES, INC. 1140-025-02-24 108 BWXT SERVICES, INC. 1140-025-02-24 108 Table 5.8: Sample identification listing for Piece A2A6A2C.

Piece ID Location Test Plan Met ISEM l Lower portion of J-groove A2A6A2C1 weld and upper surface of No plan _

clad at -30 (includes bore)

A2A6A2C2 Lower portion of J-groove Circ crack near 300 1 weld and clad at 30° bent open for SEM A2A6A2C3 Lower portion of J-groove No plan _ =

weld (RCS side)

Figure 5.8: Piece A2A6A2C after sectioning (side view of Figure 5.6). The circumferential cracks were bent open for SEM.

BWXT SERVICES, INC. 1140-025-02-24 109 Table 5.9: Sample identification listing for Piece A2A6A2D.

l Piece ID IF Location I Test Plan I Met l SEM l A2A6A2D1 Lower portion of J-groove N ln-weld at -200 (includes bore) No plan A2A6A2D2 Lower portion of J-groove Contains circ crack 1 1 weld and clad at -200 at .2001 (Lower srface -

circ crack at .

Figure 5.9: Section photo for Piece A2A6A2D (side view of Figure 5.6). The mounted surface of Piece A2A6A2D2 for optical and SEM examination is the lower surface (not visible) in the photo.

BWXT SERVICES, INC. 1140-025-02-24 110 Table 5.10: Sample identification listing for Piece A2A6A2E.

p Piece ID ll Location I Test Plan Met SEM A2A6A2E1 Lower portion of Lower surface 1 J-groove weld at -100 mounted for met A2A6A2E2 Contains clad at -200 No plan --

I~~~~~~~~~~~~~~~~~~

A2A6A2E3 Contains clad at -0° No plan --

A2A6A2E4 A2A6A2 Lower portion of LwrprinoJ-groove e ci rcPContains cracksaxial at - and 100 -- -

weld (RCS side) I(PNL Sample)

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Figure 5.10: Section photo for Piece A2A6A2E (side view of Figure 5.6).

The mounted surface of Piece A2A6A2E1 is indicated. Piece A2A6A2E4 is reserved for PNL.

BWXT SERVICES, INC. 1140-025-02-24 ill BWXT SERVICES, INC. 1140-025-02-24 111 Table 5.11: Sample identification listing for Piece A2A7.

Piece ID Location Test Plan Met J SEM A2A7A RV head and clad near 3500 No plan l _

A2A7B RV head and clad near 3400 No plan _ l A2A7C RV head near 3450 No plan -

A2A7D Undercut region near 3450 Met mount 1 A2A7E RV head and clad near nose No plan -

A2A7F Undercut region near nose Met mount 1 A2A7G RV head near nose No plan -

A2A7H Clad prior to nose No plan -

A2A71 RV head and clad near 50 ° No plan -

A2A7J RV head and clad near 400 No plan -

A2A7K Undercut region near 400 Met mount I A2A7L Center portion of clad cracks SEM open crack _

sample A2A7M Adjacent to center cracks Met mount (center 1 1 portion)

A2A7N Clad cracks toward 2700 Met mount (2700) 1 1 A2A70 Clad near 0" No plan -

A2A7P Center portion of clad cracks Reserved for PNL -

A2A7Q Clad near 40 No plan -

A2A7R Clad near 400 No plan -

A2A7S Clad cracks toward 900 Met mount 1 1 A2A7T Clad near 600 No plan --

A2A7U Clad near 100 No plan

BWXT SERVICES, INC. 1140-025-02-24 112 Figure 5.11: Section photo for Piece A2A7. The mounted surfaces

-M, -N, and -S samples are indicated by the white arrows. Further for the -D, -F, -K, sectioning of Piece A2A7L is shown in Figure 5.12.

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BWXT SERVICES, INC. 1140-025-02-24 113 Table 5.12: Sample identification listing for Piece A2A7L.

Piece ID ll Location ] Test Plan j Met SEM p

A2A7L1A Center portion of clad cracks SEM open crack sample -

1l A2A7L1 B Adjacent to center cracks No plan --

p A2A7L2A Center portion of clad cracks SEM open crack sample -- 1 p A2A71-21B IAdjacent to center cracks No plan -- --

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p Figure 5.12: Section photo for Piece A2A7L. The main crack located near p the center of A2A7L was opened in the laboratory, resulting in Pieces A2A7L1 and A2A7L2.

Additional sections, which created the -A and -B pieces, were made to facilitate the SEM examinations. The surfaces examined by SEM are indicated.

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BWXT SERVICES, INC. 1140-025-02-24 114 BWXT SERVICES, INC. 1140-025-02-24 114 Table 5.13: Sample identifications for Piece Al.

Piece ID Location Test Plan Met SEM AlA Contains cavity nose No plan -

Contains cavity side wall Met and SEeEDS toward 90° A1Bl 5.14)

AlC Contains nozzle #3 bore and No plan --

__________ small portion of cavity Noplan_

Contains cavity side wall Met and SEM/EDS AID C ontains 2700sieal samples (see Tables 21 toward 27005.15 and_5.16) _

Figure 0.13: ectioning Or riece A1 into our pieces. Pieces A1 s and A1 were further sectioned for metallography and SEM. Refer to Figure 5.14 through Figure 5.16.

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BWXT SERVICES, INC. 1140-025-02-24 115 Table 5.14: Sample identifications for Piece A B.

Piece ID Location Test Plan Met SEM Al Bi Upper portion of cavity' side No plan --

wall near 900 Al B2 Upper portion of cavity side Transverse met l wall near 900 mount Al 83 Middle portion of cavity side SEM/EDS sample -

wall near 900 Al B4 Lower portion of cavity side Transverse met l wall near 900 mount Al B5 RV head behind cavity side No plan wall AlB6 Lower portion of cavity side No plan wall near 900 Al B7 Cavity side wall No plan

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• i Figure 5.14: Section photo for Piece AlB, looking at the cavity side wall. The mounted surfaces of Piece Al B2 and Piece Al B4 is indicated.

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BWXT SERVICES, INC. 1 140-025-02-24 116 BWXT SERVICES, INC. 1140-025-02-24 116 Table 5.15: Sample identifications for Piece Al D.

Piece D Location Test Plan Met SEM Al Dl Cavity side wall near 2700 No plan Al D2A Upper portion of cavity side No plan --

wall near 2700 AID2B Upper portion of cavity side Transverse met wall near 270° mount location AlD2C Middle portion of cavity near SEM/EDS 1 l 2700 Al D2D Lower portion of cavity side Transverse met l wall near 2700 mount location Al D2E RV head behind cavity side Macroetch sample wall Al D2F Lower portion of cavity near No plan 2700 N Figure 5.15: Section photo for Piece AID, looking at the cavity side wall. Refer to Figure 5.16 for the mounted surface locations.

BWXT SERVICES, INC. 1140-025-02-24 117 Table 5.16: Sample identifications for Piece Al D2B and Piece Al D2D.

Piece ID Location Test Plan [Met SEM Al D2B1 Upper portion of cavity side Transverse met l wall near 2700 mount location 1 l Al D2132 Upper portion of cavity side No plan --

wall near 2700 AID2DI Lower portion of cavity side Transverse met wall near 2700 mount location AlD2B1J A1 D2D2 Lower wall portion of cavity side No plan lD 13 near 2700

~ ~ ~

AlDD `A1D2D2.,

Figure 5.16: Section photo for Pieces AID2B and AID2D, looking at the cavity side wall. The mounted faces for Piece Al D2B1 and Piece Al D2D1 are indicated.

p BWXT SERVICES, INC. 1140-025-02-24 118 Sample A2A7M Knoop Microhardness 350.0 u 300.0 250.0-c 200.0 a 150.0 o 100.0-i 50.0-0.0-0.000 0.050 0.100 0.150 0.200 0.250 0.300 Distance from Upper Clad Surface, inches Figure 6.1.1.1: 4X macro photograph of metallurgical mount A2A7M. Refer to Figure 5.11 for the sample orientation. Cladding thickness ranged from 0.227" to 0.277" (5.77 to 7.04 mm). Knoop microhardness values exhibited a hardness elevation near the exposed cladding surface.

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