ML030710565

Meeting Handouts of Review for 2002 -16 Pages

ML030710565
Person / Time
Site:	Palo Verde
Issue date:	03/12/2003
From:	Donohew J NRC/NRR/DLPM/LPD4
To:
Donohew J N, NRR/DLPM,415-1307
Shared Package
ML030830280	List: ML030710565 ML030770116
References
Download: ML030710565 (16)

Text

Review of 2002

• May 2002 Meeting with NRR

+ Review of Unit 2 Cycle 11

• CENTS Implementation

• Clad Performance Strategy

• CEA Investigation

• Dry Cask Storage Update 2

I

Agenda Today

• Reactivity Management

• CENTS & RSG/Power Uprate

• Fuel Performance

• CPC Replacement

+ CEA Replacement

+ Dry Cask Storage Update Reactivity Management

+ Overview of INPO AFI

+ Palo Verde Actions

1. Results 2

Overview

+ INPO Identified

• 2001 Plant Evaluation

- Reactivity Management AFI

"*REACTOR ENGINEERING

"*OPERATIONS 5

a M-ý LJkIýL Palo Verde Actions

+ NFM/Operations/Training Interface

+ Operations Single Point of Contact

+ Xenon Program

• Maneuvering Box

• Procedure Enhancement

+ Training 6

3

Results

• NO REACTIVITY EVENTS

• Standardized Game Plans

• Improved Inter-Departmental Relationships

• Improved Tools CENTS, RSG, U2 Uprate

• CENTS Implementation Status

• U2 Power Uprate Submittal 4

CENTS Implementation Status

• GL 83-11 S1 Process for 3876 MW

+ U1, U2 Complete - U3 April 2003

+ SABD Revision 20% Complete

+ Two Events Await U2 SER

- SGTR + LOP + SF

- Long Term FWLB (PSV Operability)

U2 RSG & Power Uprate

• Draft SER 3131 -- Final SER 6130

• SABD Supplement In Progress

• U2C12 Reload Safety Analyses Begun

1. Actively Participating in Development of SG Startup Test Program 10 5

Fuel Performance

• Integrated Fuel Clad Strategy:

- Advanced Clad Alloys

- Primary Chemistry

- CRUD/Oxide Software

- Low Duty Core Designs

+ Long Range Fuel Inspection Plan N'I Advanced Clad Alloys

• Westinghouse Decision: Low Tin Zirlo

- Alloy A LTA in U3C1O (Spring 2003)

1. First Batches of Standard Zirlo &

Columbia Fuel Rod

- U2Cll, UICll (2002)

- U3ClI In April 2003

+ Fuel Handling Accident Rod Pressure 12 \

• 6

Primary Chemistry

+ Additional RCS Cleaning at EOC Shutdown

+ Early Lithium Injection During Startups

+ Elevated-Coordinated Lithium Strategy

- Currently 7.1 pH

- Hold Until Inconel Corrosion Issue Resolved CRUD/Oxide Software

+ Steaming Rate in Core Design Tools

- Screen Patterns Against U3C9 Benchmark

+ APS CRUD/Oxide Model

- Nodal Level/High Duty Ass'y Rod Level

+ Vendor Fuel Duty Model

- Safety Grade Oxide and FDI Calculations 7

Low Duty Core Designs

+ Increase Feed Batch Size

- 104 vs 96 Assemblies

• Minimal Feed-Face-Feed

- UlCIO Visuals of P1M316

• U2 Uprate Corrosion Strategy

- Zirlo Clad

- Re-design Lattice Pattern IU, Re-Designed Lattice

+ Current Lattice

- 2 Enrichments

- 12 High Enrichment Rods on Each Face

+ New Lattice

- 3 Enrichments

- Same Assembly Average Enrichment

- All Peripheral Rods Low Enrichment

+ Extensive Design Review 16 8

Long Range Fuel Inspection Plan

+ Unit 2, Beginning Fall 2003

1. Zirlo Oxidation (R11, R12, R13)

+ Lithium 3.5 PPM (R11, R12)

• New Lattice (R12, R13)

• Assembly Bow (R11)

• Higher Burnup Leakers CPC Replacement

• Overview of Changes

• Licensing Schedule 9

CPC Replacement Overview

+ Upgrade to Modern Hardware

- 8 CEA Calculators

• Concurrent Software Language Change

• Preserve Original Functionality & Timing

+ First Installation - Fall 2003 Outage 19 CPC Replacement Licensing

• SER on Westinghouse Common-Q

+ Schedule for Formal RA! on PVNGS

• U2C12 Reload Engineering

- No Impact to Safety &Uncertainty Analyses

• PVNGS Supports Joint Meeting 20 10

CEA Replacement

• Review CEA History

• Determination of New, Conservative Lifetime i

• Design of New Replacement CEAs

+ Replacement of PLCEAs Review of CEA History

• CEA Finger Failures Observed - 2001

- Cracks in High Fluence CEA Tips

- Root Cause - IASCC, Inadequate Testing

- U21U3 With Small Pellet Less Severe

+ All Full Length CEAs Replaced

- Replaced by Design with Smallest Pellet

+ Lifetime Software Abandoned 22 1I

Determination of New Lifetime

• Investigating Various Options

+ Monitoring YGN Inspections

• Inconel IASCC Threshold

. Vendor Has Adjusted Software 23 Design of New CEAs

+ Now: Unique Feltmetal Design

+ Want: Industry Standard AgInCd Tips

+ Tip Region Extended 4 Inches

• Hollow AgInCd Slugs 24, 12

Replacement of PLCEAs

• Original Equipment

- Part Length, Part Strength

- Not Subject to Same Failure Mode

- Reviewing Design Bases

• Replacements

- Full Length, Part Strength

- Transparent to Safety Analysis

- Tech Spec Change Required 25 Dry Cask Storage Update 26 13

Dry Cask Storage Update SCurrent status Unit 2

- Loaded 24 assemblies in first canister March 3

- Shield lid welded March 6

- Completed first vacuum drying period March 8

- March 10 will start 2nd vacuum drying period

.apturing lessons learned from first loading 26

Fuel Loading Schedule

• Complete first canister loading in March, 2003

• Time out for Unit 3 Refueling outage, ends early May, 2003

• Complete Unit 2 campaign in June

• Load 5 casks in Unit 1 later in 2003

+ Plan to load 10 casks per year 27

UMS Amendment 3

• Palo Verde benefits

- Extended vacuum drying times

- Action statements won't require submersion of Transfer Cask and Canister for cooling

- Increased seismic limit

- Increased PWR fuel enrichment limit

+ Anticipate issuance early May 2003 28