ML102930617

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2009 Nov 16- Pnsc - Repair Update Final
ML102930617
Person / Time
Site: Crystal River Duke Energy icon.png
Issue date: 11/16/2009
From: Geoffrey Miller
Progress Energy Co
To:
Office of Information Services
References
FOIA/PA-2010-0116
Download: ML102930617 (37)
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Text

Cotimn Update Dicsso November 16th 2009 Presented by Garry Miller Progress Energy

SGR Opening Dimensions

@ Liner 23' 6" x 24' 9"

/

I

@ Concrete Opening 25'0" x 27" 0" t

Progress Energy 2

I F

3

B r-Progress Energy 4

Locatio of th Deamnt Note - Tendon depiction is for illustrative purposes and is not an exact scale V3,.6 008a PON TOOA 11-5

Condtio Asssmn Technique Copee or Planne o Impulse Response (IR) Scanning of Containment Wall Surfaces

" Comprehensive on external exposed surfaces

" Representative sampling inside buildings o Core bores

  • Use to cross-check IR results o Includes visual inspection/documentation of surface inside the bored hole o IWL visual inspection of containment external surface (affected areas) o Dome Inspections

" IR scans in selected area o Core bore samples in repaired and non-repaired areas

" Physical survey (compared to 1976 results) hkPpy. P Progress Energy 6

I r

A B

C I

A I R I

r I

A B

C IR scans completed per PT-407T:

Blue = no delaminatior A

Actual IR scan output data:

Blue = no delamination Yellow= transition Red = delaminated Drawing scale is not exact D

E F

G H

I J

K L

M N

0 P

Q R

S T

U V

W X

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AA AB AC AD D

E F

G H

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K L

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U V

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EL 250' Pour 16 EL 240' Pour 15 EL 230' Pour 14 EL 220' Pour 13 EL 210' Pour 12 EL 200' Pour 11 EL 190' Pour 10 EL 180' Pour 9 EL 170' Pour 8 160' Pour 7 EL 150' Pour 6 EL 140' Pour 5 EL 130' Pour 4 EL 120' Pour 3 EL 110' Pour 2 100' Pour 1 EL 90' 1-Intermediate Bldg Roof EL 149' 0" AE AF AG Equipment Hatch Y

z AA AB AC Aux Bldg Roof EL 167' 8" I/

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lO'x 16' 10' x 60' 13' x 42' i

a I

q Progress Energy 7

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7 A

B C

A B

C A

B C

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-9 IR scans completed per PT 407T:

Blue = no delaminatior U

Actual IR scan output data:

Blue = no delamination Yellow= transition Red = delaminated Drawing scale is not exact P

Q R

Fuel Transfer Bldg Roof EL 200' 4" D

E F

G H

J K

L M

N 0

P Q

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T U

V W

X Y

Z AA AB AC AD D

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AA AB AC AD EL 250' Pour 16 EL 240' Pour 15 230' Pour 14 EL 220' Pour 13 210' Pour 12 EL 200' Pour 11 EL 190' Pour 10 EL 180' Pour 9 EL 170' Pour 8 EL 160' Pour 7 EL 150' Pour 6 140' Pour 5 EL 130' Pour 4 EL 120' Pour 3 110' Pour 2 EL 100' Pour 1

+/----

- - - - EL 90' 8'x 16' EL 160' 10' x60' EL 143' 9'x 12' EL 119' 8'x 12 Intermediate Bldg Roof EL 149' 0" Intermediate Bldg Roof EL 149' 0"

.1-i Progress Energy 8

Buttress # 2 Buttress # 3 Buttress #4 Buttress #5 OPDO EL ~w POUR15 POU 13 P0MR POUR 6 j 0 4 9.6 POUR 3 El I COR MORE WITH4 EL2A04404 POUR4.

COIN OM W WDRAMPAI!O WAL&E ToP4 EL 1WV POURI IEL NE

Core Bores Buttress Spans 5 I - 2 (as of Nov 14th2OO9)

I mmummomom" Buttress#5 AZ24 Buttress # 6 70 Buttress #1 I4 Buttress #

KXOEBE 1 2C 270 5

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A B

C D

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G H

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K 33 L*29 well M

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FUEL TRANSFER BLDG. ROOF EL. 20-4" I ¶2 I.

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H 67 1

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G H6 3 I

62 J

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C Is 2

EL M EL 2W0 S12 INTERMEDIATE BLDG. ROOF EL. 149.04 INTERMEDIATE BLDG. ROOF EL. 149,-0" RBCN-0013 1

EL. 14 0 CORE 07 040.2&WWTOS 0 cwSOMEcrwO-AMIAI (PAPR ;203 a ila-

-OUR 22 POUR I7 RBCN-001 1 RBCN-0012

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SJ1M CMM SMVWOLU COWn SMR DMIME SGR OPENING POUR 16 EL. 240' POUR 15 EL. 230' POUR 14 EL. 220' POUR 13 EL. 210' POUR 12 EL. 200' POUR 11 EL. 190' POUR 10 EL. 180' POUR 9 EL. 170' POUR 8 EL. 160' pil IR 7 zr 11 148

edo Buftress #3 135 Buftress#4 4 EL. 22VY EL. 210 Tendon Pattern at time of cutting SGR Opening

-Energized Tendon Removed Tendon EL IM

~EL INU Buttress (typical)

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~1I ill EL 140P 12

Roo Cas Anayi a

erc Unrfue Faiur Moe asofNv "20 80 70 60 50 40 30 20 10 0

  • External Events Operational Events
  • Inadequate Containment Cutting
  • Inadequate Concrete - tendon interactions
  • Shrinkage, Creep, and Settlement

" Chemically or Environmentally Induced Aging

  • Inadequate Use of Concrete Materials
  • Inadequate Concrete Construction
  • Inadequate Concrete Design due to High Local Stress V

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Progress Energy 13

Roo Cas Anayi Fiel DaaAqusto o Impulse Response (IR) Scans o Boroscopic Inspections o Core bore holes o Inside the delaminated gap o Visual inspections o Delamination cracks at SGR Opening o Larger fragments from concrete removal process o Containment external surface o

Think N

Progress Energy 14

Roo Cas Anayi Fil aaAqiito.cniud a..

A....

o Nearby energized tendons lift-off (vertical and horizontal) o Containment ID measurements o Strain gauge measurements o Linear variable displacement transducer (LVDT) gap monitoring o Building Natural Frequency

,e n Progress Energy 15

Roo Cas Anayi FieldDat Acusto (cntnud o Core bores laboratory analysis

" Petrographic Examination

" Modulus of Elasticity and Poisson's Ratio

" Density, Absorption, and Voids

" Compressive Strength, Splitting Tensile Strength, and Direct Tensile Strength Na.

Progress Energy 16

DESIGN BASIS ANALYSIS AN

  • Progress Energy 17

MPR 3D FE Model Model Features AN-180 degree Symmetric model

  • Symmetry plane @ 150 degrees midway Between Buttress 3 & 4 / 1 & 6
  • 1/2 Opening, 1/2 Damage & 1/2 Hatch Modeled Explicitly
  • Concrete Model Brick elements for all components Dome and Base modeled independently Simplified ring beam and buttress geometry Constraint equations used to join dome and ring girder for meshing efficiency Constraint equation used to model sloped surfaces of the hatch Liner Model
  • Shell mesh with variable thickness Shared nodes with containment inner surface
  • Tendon Modeling

" Hoop tendons modeled explicitly for release and re-tensioning o Vertical Tendons modeled explicitly for release and re-tensioning

  • Dome tendons modeled independently with forces ported to global model

,1 Progress Energy

'1 I g

MPR 3D FEode Moe Fetue (cotined ELMT NOV 10 2009 MAT NUM 11:33:30 19 ETterio Peetnt 19 hin FlelExterior Elements

MPR 3D FE Model Load Cases

  • Live and Dead Loads
  • Wind (110mph @ 30' increasing to 179 mph @ 166'10")
  • Tornado Wind (300 mph)
  • Tornado pressure (external pressure of 3 psig)
  • Seismic (OBE - 0.05 and SSE - 0.10)
  • Temperature Loads
  • Accident Pressure (55 psig)
  • Thm, A.,

Progress Energy 4V

MPR 3D FE Model Specific Analysis to be Performed

  • Existing Design Cases for Comparison

" Gravity (.95 G)

" Internal Dead Load (200 puff)

Tendons (1635 kips / tendon)

Include losses

  • Internal Pressure (55.0 psi) o Wind Pressure (0.568 psi)

Seismic Accident Thermal

  • Planned Analysis Sequence Dead Load + Tendons Remove Hoop + Vertical Tendons in SGR Opening
  • Remove SGR Opening
  • Delamination(l)
  • Remove Additional Hoop & Vertical Tendons Replace the SGR Plug(2)

Repair(2)

Re-tension Tendons SAVE Path Dependent Model for Starting point to Run 5 Controlling Design cases (1) Root cause must confirm delamination timing (2) Sequence of replacing SGR concrete plug or repair may be adjusted Progress Energy 21

Repair

~Attiue o Incorporates and is compatible with Root Cause Analysis findings o Restores applicable design basis margins o Incorporates Life of Plant Considerations

  • Long Term Surveillance and/or Maintenance Requirements

Reair Altraie Consid re o Use-as-Is o Anchorage Only o Cementitious Grout o Epoxy Resin o Delamination Removal and Replacement Progress Energy 23

o Use as Is - Rejected

" Degraded safety related structure

" Design margins are reduced o Anchorage Only-Rejected Containment and delaminated layer will not structurally perform as monolithic shell o Would function as two independent shells pinned together Detensioning is not expected to close the delamination gap (greater than 2" in some places) o Would require some competent fill material be added Anchorage plate washers (acting to distribute the load) would have minimal separation creating difficulty in the field

" Tendons are not always equally spaced

" Rebar mat interference at targeted anchorage locations kProgress Energy 24

o Cementitious Grout-Rejected

  • Will not be able to penetrate all of the fissures observed along the delaminated surface Ko Creates un-repaired weak planes, affecting tensile capacity
  • Multi-fissure segmented cracking and dislodgement could block adjacent areas from being filled
  • Mock-up testing to simulate all of the in-situ conditions is problematic
  • Examples - Cleanliness of surfaces, parallel fissures
  • Would likely require in-situ testing that would be difficult to control in the field ITne.

Progress Energy 25

Reai Altenatve "Cmniiu Grout" o Cementitious Grout - Rejected (continued)

Mock-up test needed to validate tendon duct integrity (leak tightness against grouting injection)

K> Test may indicate leak tightness is not assured Requires anchorage to resist grout injection pressures( >20 psig), and this has all of the same difficulties as detailed in the "Anchorage Only" repair

,> This anchorage system limits access to effectively perform IR scans to ensure complete grout coverage Physical properties of grout would require detailed evaluation and/or verification to prior to use

  • Many grouts are blended for geotechnical applications K> Tensile strength of typical grouts is significantly lower than.epoxy resins N

Tet Progress Energy 26

o Epoxy Resins - Rejected Not viable in gaps greater than 1/4" due to exothermic reaction o Delamination gaps are well beyond this limit, including > 2" in some locations May not be able to penetrate all of the fissures observed along the delaminated surface 0 Creates un-repaired weak planes, affecting tensile capacity

" Raising the injection pressure to improve penetration in fissures 0 Anchorage becomes more difficult C> Tendon conduit integrity becomes more difficult

" Mock-up test needed to validate tendon duct integrity (leak tightness against epoxy injection) 0 Test may indicate leak tightness is not assured aink R Progress Energy 27

o Epoxy Resins -- Rejected (continued)

Mock-up testing to simulate all of the in-situ conditions is problematic c> Examples - Cleanliness of surfaces, parallel fissures o Would likely require in-situ testing that would be difficult to control Requires anchorage to resist epoxy injection pressures (8 to 20 psig), and this has all of the same difficulties as detailed in the "Anchorage Only" repair 0 This anchorage system limits access to effectively perform IR scans to ensure complete coverage Mk Progress Energy 28

RearAltenatve Reai an Replaemen o Delamination Removal and Replacement - Selected

" Delamination Removal Challenges o Safe removal of delaminated concrete at elevated heights 0 Avoiding collateral damage to tendon conduits

,o Minimize damage to the remaining substrate to minimize concrete bruising and to provide a favorable bonding surface c> Requires verification planar fissures are removed

" Requires new radial reinforcement design (anchored to the substrate)

" Will require treatment of planar fissures (if encountered) at periphery Iheet 0

Progress Energy 29

Repai Altenatve o Repair and Replacement - Selected (continued)

Need to secure and verify same constituents to use the existing qualified design concrete mix (for the SGR Opening)

Concrete Placement

÷ Needs to construct ganged forms for placing the pours K Need to determine method to anchor the forms 0 Elevations create work execution challenge oon (A*,ik°r Progress Energy

,,J t,./

BoocpcPoo Dlm into Ga Dimesion Buttress 3-4, Cell K, Core #55 1 IButress 3-4, Cell H, Core #82 Progress Energy 31

Booeoi Photos 9eain o

Ga EDimnin Buttress 3-4, Cell Z, Core #78 Buttress 3-4, Cell X, Core # 80 Progress Energy 32

Brscoi Photos Debri in the Deaino Ga I Buttress 3-4, Cell H, Core #81 Buttress 3-4, Cell H, Core #82 Progress Energy 33

Borsco PhotosS Dbis.

in th

.amnt Gap I Buftress 3-4, Cell Z, Core # 78 1 I Buttress 3-4, Cell Y, Core # 611 Progress Energy 34

Booe oi Photos Fissure inth Delmnto Ga I Buftress 3-4, Cell J, Core #71 IBuftress 3-4, Cell M, Core #17 Progress Energy 35

BorscSi Photo Ss Fisue inth Delmnto Gap Buttress 3-4, Top of SGR Opening Upper Left Corner, Looking West Buttress 3-4, Top of SGR Opening Upper Left Corner Progress Energy 36

Su mr u

stin Questions 37

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