ML093500565
| ML093500565 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 12/15/2009 |
| From: | AREVA NP, Entergy Corp |
| To: | Division of Operating Reactor Licensing |
| Kalyanam N, NRR/DORL/LPL4, 415-1480 | |
| Shared Package | |
| ML093500491 | List: |
| References | |
| Download: ML093500565 (67) | |
Text
1 ANO1 Steam Generators NRC Presentation Current Status of the Arkansas Nuclear One Unit One Steam Generators Entergy/AREVA NP December 2009
2 ANO1 Steam Generators Introductions -
Entergy Jaime McCoy - EP&C Manager Frank Philpott - EP&C Supervisor Dan Meatheany - SG Program Owner Areva
Jeff Brown - EOTSG Component Design Eng.
Jim Begley - Technical Consultant
Dennis Lang - Product Line Manager
3 ANO1 Steam Generators AGENDA Opening Remarks - Jaime McCoy Description of EOTSG - Dan Meatheany Outage Results - Dan Meatheany Proprietary Section Root Cause - Jim Begley Outage Plans for 1R22 - Dan Meatheany Questions Closing Comments - Jaime McCoy
4 ANO1 Steam Generators Opening Comments Jaime McCoy Engineering Programs and Components Manager
5 ANO1 Steam Generators Description of EOTSG - Dan Meatheany
Generators Replaced in Fall of 2005 (1R19)
First ISI was Spring 2007 (1R20)
Second ISI was Fall 2008 (1R21)
EOTSG was Manufactured by AREVA NP
Design Enhanced from Originals (EOTSG)
First of a Kind Design in Several Areas - This was to Address Original OTSG Degradation Issues
6
- 15 Tube Support Plates
- Floating TSP/Tie Rod
- Aspirating Port in 10th Span
- Upper and Lower Shroud
- Orifice Plate in Downcomer
- FW into Downcomer
- EFW Penetrates Shroud
- 52 Tie Rods Concentric Circles ANO1 Steam Generators
7 ANO1 Steam Generators Design Changes 690TT Tubing with No Tube Ends No Open Lane Full Depth Hydraulic Expansion in Upper and Lower TSP are Stainless Steel not Carbon Steel Use of a Filler Plate on the 1st, 14th and 15th - Original was 1st and 15th Only and was a Wedge Design Attached to TSP Use of TSP Wedges (AREVA NP Design)
First Span Tie Rods Reduced in Diameter and Longest Span - 46 inches Tie Rods Are Different in Design/Material Use of a Main Steam Venturi
8 ANO1 Steam Generators 1R20 and 1R21 Outage Results
- Scope
- Bowed Tie Rods
- Wear
9 ANO1 Steam Generators
10 ANO1 Steam Generators 1R21 Scope
- 100% bobbin
- 100% X-probe of all Wear Indications
- Secondary Side Visual
- Annulus and First Tube Support Plate
- First Span Inner Bundle of Rods
- 14th and 15th Tube Support Plate
11 ANO1 Steam Generators Bowed Tie Rods
12 ANO1 Steam Generators 1R20 1R21
- of Bowed Tie Rods 9
10 Spans with Contact 1
1 Spans with Bowed Tie Rods 1st, 14th and 15th 1st, 2nd, 13th,14th and 15th Maximum Extent of Bowing 0.89 1.19 Thermal Cycles 3
1 EFW Actuation 1
0
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26 ANO1 Steam Generators TSP Wear
27 ANO1 Steam Generators 1R20 - SGA 1R21 - SGA
28 ANO1 Steam Generators 1R20 - SGB 1R21 - SGB
29 ANO1 Steam Generators SGA - 1R21
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31 ANO1 Steam Generators TSP Wear Growth Rate
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33 ANO1 Steam Generators Growth Rate Data from 1R21 SGA SGB
34 ANO1 Steam Generators ANO Unit 1 Tie Rod Bowing Review Jim Begley Proprietary Section
35 ANO1 Steam Generators Proprietary Section
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58 ANO1 Steam Generators Proprietary Section
59 ANO1 Steam Generators ANO Unit 1 1R22 Inspection Plan Dan Meatheany
60 ANO1 Steam Generators 1R22 Inspection Plans Purpose of Inspections Scope of Inspection Contingency Inspection/Repair Plans Acceptance Criteria Definition of Success
61 ANO1 Steam Generators Purpose of Inspections Confirm Apparent Cause and Analysis Inputs Determine magnitude of tie rod bow Determine if free-span wear exists on tubes around tie rods Determine if denting exists on tubes around tie rods
62 ANO1 Steam Generators Current Scope of 1R22 Inspection Plans Bobbin Test of Surrounding Tubes for All 52 Tie Rods in Both Steam Generators
63 Acceptance Criteria for Tie Rod Lateral Bowing Category 1R21 Inspection Value Acceptance Criteria Potential Additional Analysis, Repairs or Inspections Maximum Lateral Extent of Tie Rod Bowing in First Span, Outermost Ring 1.19 inch
<1.5 inch
> 2.0 inch Maximum Lateral Extent of Tie Rod Bowing in First Span, Second Outermost Ring 0.47 inch
< 0.63 inch
>0.78 inch Maximum Lateral Extent of Tie Rod Bowing in 14th and 15th Spans, Outermost Ring 0.19 inch
< 0.25 inch
>0.32 inch Maximum Lateral Extent of Tie Rod Bowing in 14th and 15th Spans, Second Outermost Ring No bowing detected
< 0.06 inch
> 0.06 inch Bowed Rods in Contact with Tubes outside of First Span 0
0
>2
64 Acceptance Criteria for Wear/Dents caused by Tie Rod Lateral Bowing Category 1R21 Inspection Value Acceptance Criteria Potential Additional Analysis, Repairs or Inspections Wear on Tube from Tie Rod 0
0
> 5% TW Tube to Tube Wear as a Results of Tie Rod Bowing 0
0
> 5% TW Dents in Tubes Around Bowed Tie Rods > 1 volt 0
0
> 1
65 ANO1 Steam Generator Definition of Success (1R22)
Tie rod bowing magnitude is as predicted No free-span wear found in tubes around tie rods No denting found in tubes adjacent to tie rods Results of inspection will be used to confirm the applicability of the ASME code qualified stress calculation for A steam generator Future Plans (1R23)
Based on Wear will perform 100% Bobbin Re-evaluate Extent of Bowing Plan to Skip 1R24 and Possibly 1R25
66 ANO1 Steam Generators Questions ?
67 ANO1 Steam Generators Closing Comments - Jaime McCoy