ML092310466

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Meeting Slides, Tennessee Valley Authority Watts Bar Nuclear Plant Unit 2 Refurbishment Program
ML092310466
Person / Time
Site: Watts Bar Tennessee Valley Authority icon.png
Issue date: 08/06/2009
From:
Tennessee Valley Authority
To:
Office of Nuclear Reactor Regulation
References
Download: ML092310466 (26)
v • d • e


Text

TENNESSEE VALLEY AUTHORITY WATTS BAR NUCLEAR PLANT UNIT 2 1

Refurbishment Program August 6, 2009

Agenda

  • Introductions
  • WBN Unit 2 Material Condition
  • WBN Unit 2 Refurbishment Program
  • WBN Unit 2 Refurbishment Program Implementation
  • WBN U Unit it 2 T Testing ti P Programs
  • Conclusion 2

WBN Unit 2 Material Condition Evaluation of Material Condition

  • Performed Plant Walkdowns
  • Identify Missing/Removed Components
  • Baseline to Determine Current Configuration of Installed Equipment
  • Electrical
  • Mechanical
  • Civil
  • Results Addressed by Engineering Modifications and Refurbishment Program 3

WBN Unit 2 Material Condition As-found condition of internal piping shown below.

Containment Spray Piping - 676 Pipe Chase 4

WBN Unit 2 Material Condition Centrifugal Charging Pump 2B-B Pump recently removed for refurbishment. Internal suction piping shown above and discharge at left.

5

WBN Unit 2 Material Condition Centrifugal Charging Pump 2A-A Pump is currently being removed for refurbishment.

Internal pump casing shown at left and suction piping at right.

6

WBN Unit 2 Material Condition Ventilation Damper Damper sent off-site to vendor facility for inspection, evaluation and recommended refurbishment and testing requirements.

7

WBN Unit 2 Refurbishment Program Overview WBN2 WBN2 Passive Component Passive Component Evaluation/Refurbishment Evaluation/Refurbishment Procedure/Work Order Process that provides criteria Work document that provides for evaluating passive direction for evaluation and components to determine if refurbishment, if required of further refurbishment is specific passive component/

required. commodity type.

TI-216 WBN2 WBN 2 Testing Programs Construction Project Refurbishment Program Testing Programs to ensure g

SSCs meet original licensing, g,

design and equipment vendor Program ensures WBN2 Plant specifications at turnover.

Equipment meets original: Testing includes:

- Licensing Basis - System Flushing

- Design Basis - Construction Testing

- Equipment Vendor - Cold Hydrostatic Tests Specifications - Hot Functional Tests N1302 WBN2 - RG 1.68 Testing WBN2 Active Component Component Refurbishment Refurbishment Evaluation Procedure/Work Order Component Refurbishment Work document that provides process evaluates each direction for refurbishment of component to assess specific component or active component type.

- Replacement

- Vendor Refurbishment May include evaluation of

- Refurbishment passive components during

- No Action Required active component work.

8

WBN Unit 2 Refurbishment Program Refurbishment Program Equipment Scope

  • Safety Related / Non-Quality Related
  • Active / Passive Refurbishment Program Process Steps
  • Identification
  • Classification
  • Inspection/Evaluation
  • Refurbishment/Replacement
  • Component/System Testing Required Outcome
  • Plant meets original licensing, design and equipment vendor specifications 9

WBN Unit 2 Material Condition Refurbishment/Replacement Commodity Estimates COMMODITY TOTAL PROJECT (estimate)

Pumps 80 Motors 90 Breakers 600 Manual Valves 4000 Air Operated Valves 500 Motor Operated Valves 200 Safety/Relief Valves 300 10

Refurbishment Program Implementation Overview WBN2 WBN2 Passive Component Passive Component Evaluation/Refurbishment Evaluation/Refurbishment Procedure/Work Order Process that provides criteria Work document that provides for evaluating passive direction for evaluation and components to determine if refurbishment, if required of further refurbishment is specific passive component/

required. commodity type.

TI-216 WBN2 WBN 2 Testing Programs Construction Project Refurbishment Program Testing Programs to ensure g

SSCs meet original licensing, g,

design and equipment vendor Program ensures WBN2 Plant specifications at turnover.

Equipment meets original: Testing includes:

- Licensing Basis - System Flushing

- Design Basis - Construction Testing

- Equipment Vendor - Cold Hydrostatic Tests Specifications - Hot Functional Tests N1302 WBN2 - RG 1.68 Testing WBN2 Active Component Component Refurbishment Refurbishment Evaluation Procedure/Work Order Component Refurbishment Work document that provides process evaluates each direction for refurbishment of component to assess specific component or active component type.

- Replacement

- Vendor Refurbishment May include evaluation of

- Refurbishment passive components during

- No Action Required active component work.

11

Refurbishment Program Implementation Obtain Unit Two Master Equipment List (MEL) sorted by function with subsets of quality code, Safety Related (SR), Quality Related (QR),

Non-Quality Related (NQR), and No Classification (NC)

Evaluate each component using CCPP 25402-000-GPP-0000-TI216 as a Missing guide and enter RC for refurbishment to be performed NO Yes NO Aging Affected Yes Total NO Replacement Required Yes Vendor To Obsolete Refurbish NO Yes Vendor Refurbishment Replace with Like Provide EDCR Required for Like Justification On site RC=J Yes Part NO RC=H Off site RC=I Replacement RC=A Required Replace Required Other NO Parts Refurbishment RC=B Required Complete and Obtain Approvals Yes for Attachment B Inspection RC=D Lubrication RC=E Testing RC=F Cleaning RC=G Functionally Update Database Tested RC=C 12

Refurbishment Program Implementation

  • Implementing Work Instructions/Procedures

- Provide Guidance on Refurbishment to be Performed

- Provide Guidance for Refurbishment/Evaluation Requirements to be Met Vendor Manuals Design Specifications Piping Standards Operating Experience 13

Refurbishment Program Implementation Sample Work Order 14

Refurbishment Program Implementation Sample Visual I

Internal l Inspection I i Data Sheet 15

Refurbishment Program Implementation 16

Refurbishment Program Implementation 12 Swing Check Valve The refurbishment activity has identified surface indications (right) which could affect the pressure boundary in the bonnet gasket area which will likely require a Code repair.

17

Refurbishment Program Implementation Example Check Valve Data Sheet 18

Refurbishment Program Implementation This valve is a 1 1/2, Hammel-Dahl, Globe valve with an A-40 Pneumatic Diaphragm type actuator.

The items subject to refurbishment are the actuator diaphragm di h and d

valve packing 19

Refurbishment Program Implementation 20

Refurbishment Program Implementation Example Air Operated Valve Refurbishment Sheet 21

Refurbishment Program Implementation 22

Refurbishment Program Implementation Example p

Valve Packing Data Sheet 23

Refurbishment Program Implementation Overview WBN2 WBN2 Passive Component Passive Component Evaluation/Refurbishment Evaluation/Refurbishment Procedure/Work Order Process that provides criteria Work document that provides for evaluating passive direction for evaluation and components to determine if refurbishment, if required of further refurbishment is specific passive component/

required. commodity type.

TI-216 WBN2 WBN 2 Testing Programs Construction Project Refurbishment Program Testing Programs to ensure g

SSCs meet original licensing, g,

design and equipment vendor Program ensures WBN2 Plant specifications at turnover.

Equipment meets original: Testing includes:

- Licensing Basis - System Flushing

- Design Basis - Construction Testing

- Equipment Vendor - Cold Hydrostatic Tests Specifications - Hot Functional Tests N1302 WBN2 - RG 1.68 Testing WBN2 Active Component Component Refurbishment Refurbishment Evaluation Procedure/Work Order Component Refurbishment Work document that provides process evaluates each direction for refurbishment of component to assess specific component or active component type.

- Replacement

- Vendor Refurbishment May include evaluation of

- Refurbishment passive components during

- No Action Required active component work.

24

WBN Unit 2 Testing Programs System Flushing Testing

  • Construction tests
  • Hot Functional

Conclusion In Summary TVA :

  • Established the Existing Condition of WBN Unit 2
  • Developed and Implemented Programs to
  • Install New Equipment Where Necessary
  • Refurbish Existing Equipment
  • Improve Material Condition and Equipment Performance Where Appropriate
  • Will Perform Testing to Ensure Systems and Components will Meet Original Design, Licensing and Vendor Specifications 26
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