ML17228B049

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Rev 0 to Subsequent Inservice Exam Plan for Pressurizer Instrument Nozzles.
ML17228B049
Person / Time
Site: Saint Lucie NextEra Energy icon.png
Issue date: 02/03/1995
From: Anderson E
FLORIDA POWER & LIGHT CO.
To:
Shared Package
ML17228B046 List:
References
PSL-200-95-PRZ, NUDOCS 9503070362
Download: ML17228B049 (15)


Text

NUCLEAR ENGINEERlNG DEPARTMENT Component, Support and Inspections P.O. Box 14000 Juno Beach, Florida 33408 St. Lucie Nuclear Power Plant Unit 2 ATTACHMENTC SUBSEQUENT INSERVICE EXAMINATIONPLAN FOR THE PRESSURIZER INSTRUMENT NOZZLES Prepared by Florida Power and Light Company Code Programs Section For St. Lucie Nuclear Power Planf 10 Miles South of Ff. Pierce on A1A Ft. Pierce, Florida 33034 Commercial Service Date: August 8, 1983 NRC Docket Number: 50-389 Document Number: PSL-200-95-PRZ Revision Number: 0 Date: February 3, 1995 Prepared by:

Sr. Specialist - ISI Approved by:

Supervisor - Code Programs 9503'070~62 950302 PDR ADOCK 05000389 PDR

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ST. LUCIE UNIT 2 PSL-20045+RZ NUCLEAR ENGINEERING CSINODE PROGRAMS SECOND INSERVICE INSPECTION INTERVAL Reviabn 0 P.O. BOX 14000 JUNO BEACH, FLA SUBSEQUENT INSERVICE EXAMINATIONPLAN February 3, 1995 33408 I FOR (407) 6944181 PRESSURIZER INSTRUMENT NOZZLES TABLE OF CONTENTS Table of Contents Record of Revision .

Abstract ..

1.0 Introduction 1.1 Inspection Interval .

1.2 Inspection Periods .

1.3 Applicable Documents

1.4 Applicable Code Edition and Addenda

2.0 Development of Inspection Plan 2.1 Background 2.2 Description of Repair/Modification ..

2.3 Nondestructive Examination Procedure 2.4 Nondestructive Examination Method 2.5 Ultrasonic Calibration Block 2.6 Inspection Schedule 3.0 Records 3.1 General 3.1.1 Inspection Zones 3.2 Final Reports 3.3 lnservice Inspection Summary Report UST OF FIGURES 3-1 Inservice Inspection Schedule 9 3-2 ISI Sketch .. 10 File PSL2PRZ95 Page 2 of 11

l NOCLEARs ENGINEERING CSINODE PROGRAMS SECOND INSERVICE INSPECTION INTERVAL Revhbn 0 P.O. BOX 14000 JUNO BEACH, FLA SUBSEQUENT INSERVICE EXAMINATIONPLAN February 3, 1886 33408 FOR (407) 684%181 PRESSURIZER INSTRUMENT NOZZLES RECORD OF REVISION REVISION DATE AFFECTED REASON FOR REVISION No. PAGES February 3, 1995 Entire Initial issue Document File PSL2PRZ.95 Page 3 of 11

NBCLEARiENGINEERING CSINODE PROGRAMS SECOND INSERVICE INSPECTION INTERVAL Revisbn 0 P.O. BOX 14000 JUNO BEACH, FLA SUBSEQUENT INSERVICE EXAMINATIONPLAN February S, 1995 SS408 FOR (407) 684%181 PRESSURIZER INSTRUMENT NOZZLES ABSTRACT This document provides the Florida Power and Ught Company proposed plan and schedule for performing subsequent inservice reexaminations of the St. Lucle Unit 2 Pressurizer Upper Head Steam Space Instrument Nozzle indications as required by the American Society of Mechanical Engineers (ASME), Boiler and Pressure Vessel Code (B&PVC),Section XI.

The Pressurizer instrument Nozzles are classNed as Quality Group A, ASME Code Class 1, and'therefore governed by the rules and requirements set forth in the applicable Edition and/or Addenda of Section XI, to the extent practical within the limitations of design, geometry and materials of construction of the components as stated in 10 CFR 50.55a (b)(2).

During the 1994 refueling outage, external leakage was identified at the pressurizer steam space instrument nozzle "C". Supplemental surface examinations of the J-welds for three of the four nozzles Identilied several indications which exceeded the acceptance criteria of IWB-3000. An analytical evaluation IWB-3132.4, was performed in accordance with the requirements IWB-3600 to allow the unit to return to service for one fuel cycle.

The proposed plan and schedule included within this document addresses the subsequent inservice reexamination requirements of IWB-2420, where the acceptance criteria of IWB-3600 are satisfied, and the area (s) containing the flaws requires reexamination.

Figure 3-1 identiTies each instrument nozzle selected for reexamination. This Figure providegsuch information as component Identification, component description, nondestructive examination method, and the proposed schedule within the Second Inservice Inspection Interval and by period the inservice reexaminations are to be performed.

File PSL2PRZ.95 Page 4 of 11

NUCLEARiENGINEERING CSINODE PROGRAMS SECOND INSERVICE INSPECTION INTERVAL RevhIon 0 P.O. BOX 14000 JUNO BEACH, FLA SUBSEQUENT INSERVICE EXAMINATIONPLAN February 3, 1885

$ $ 408 FOR (407) 884%1 81 PRESSURIZER INSTRUMENT NOZZLES

1.0 INTRODUCTION

This document provides the proposed Inservice Examination Schedule for the subsequent reexaminations of the St. Lucie Nuclear Power Plant, Unit 2, Pressurizer Upper Head Steam Space Instrument Nozzles.

The Commercial Service Date for St. Lucie Nuclear Power Plant Unit 2 was August 8, 1983.

1.1 INSPECTION INTERVAL The Second Inservice Inspection Interval became effective on August 8, 1993 and is scheduled to end on August 8, 2003.

1.2 INSPECTION PERIODS The Second lnservice Inspection Interval is divided into three successive inspection period as determined by calendar years of plant service within the interval. Identified below are the period dates for the second inspection interval.

PERIOD START END August 8, 1993 August 8, 1996 August 8, 1996 August 8, 2000 August 8, 2000 August 7, 2003 1.3 APPLICABLE DOCUMENTS ASME Boiler and Pressure Vessel Code, Sections V, 1989 Edition, "Nondestructive Examination" ASME Boiler and Pressure Vessel Code,Section XI, 1989 Edition, "Rules for Inservice Inspection of Nuclear Power Plant Components" PSL-200, St. Lucie Unit 2 Second Inservice Inspection interval Program, Plan and Schedule, revision 0, July 24, 1993.

32-1235128-00, Fracture Mechanics Analysis of St. Lucia Pressurizer Instrument Nozzle, revision 0, December 23, 1994 32-1235127-00, Stresses for St. Lucie Unit 2 Pressurizer LEFM, revision 0, December 8, 1994 1.4 APPLICABLE CODE EDITIONS AND ADDENDA Pursuant to Title 10, Part 50, Section 55a(g)(4), of the Code of federal regulations, the Inservice Inspection requirements applicable to nondestructive examination for the Second InseIvice Inspection Interval is based on the rules set forth in the 1989 Edition of Section XI, hereafter, referred to as the Code.

File PSL2PRZ.95 Page 5 of 11

'NUCLEAR ENGINEERING CSINODE PROGRAMS SECOND INSERVICE INSPECTION INTERVAL Revhien 0 P.O. BOX 14000 ISI JUNO BEACH, FLA SUBSEQUENT INSERVICE EXAMINATIONPLAN February 3, 1995 33408 FOR (407) 694<181 PRESSURIZER INSTRUMENT NOZZLES 2.0 DEVELOPMENT OF INSPECTION PLAN This document provides the proposed plan and schedule for conducting inservice nondestructive reexaminations of the Florida Power and Light Company's (FPL), St. Lucie Nuclear Power Plant Unit 2, four Pressurizer Upper Head Steam Space Instrument Nozzle.

2.1 BACKGROUND

During the 1994 refueling outage, external leakage was identified at the pressurizer steam space instrument nozzle "C". Supplemental surface (liquid penetrant) examinations of the J-welds for three of the four nozzles identified several indications on the inside surface which exceeded the acceptance criteria of IWB-3000. An analytical evaluation IWB-31 32.4, was performed in accordance with the requirements IWB-3600 to allow the unit to return to service for one fuel cycle.

Following the units return to service, FPL contracted with B8 W Nuclear Service Company to provide a bounding flaw evaluation of the 1.0 inch nozzles in the pressurizer. The results of this flaw evaluation were acceptable for the design life of the plant, per IWB-3612 of the Code.

In accordance with IWB-2420(b), FPL is required to conduct reexaminations on the four Pressurizer Upper Head Steam Space Nozzles for three consecutive inspection periods.

Summarized below is the proposed plan FPL will utilize to conduct these reexaminations.

2,2 DESCRIPTION OF REPAIR/MODIFICATION During the 1994 refueling outage FPL performed a repair/modification of the four Pressurizer Upper Head Steam Space Instrument Nozzle. This repair/modification consisted of welding an external pad to the outside surface of the pressurizer shell.

Welding was performed in accordance with ASME Code Case NP32, Repair Welding using Automatic or Machine Gas Tungsten - Arc Welding (GTAW) Temperbead Technique.

Due to the repair/modifications unique configuration and the need to be able to monitor the flaw over the service life of the pressurizer, FPL proposes the following:

2.3 NONDESTRUCTIVE EXAMINATIONPROCEDURE Reexamination of the four Pressurizer Upper Head Steam Space Instrument Nozzles will be performed ln accordance with a qualified FPL nondestructive examination procedure which conforms to the requirements of the FPL Quality Assurance Program and the applicable Code. This procedure shall be written specifically for monitoring flaw indications.

2.4 NONDESTRUCTIVE EXAMINATIONMETHOD FPL proposes to conduct a manual volumetric (ultrasonic) examination from the outside surface of the pressurizer shell in monitoring the progression of the flaw(s) over the service life of the component. The technique to be used shall be qualified and demonstrated to the satisfaction Authorized Nuclear Inservice Inspector.

File PSL2PRZ.95 Page 6 of 11

NUCLEAR,ENGINEERING CSIODE PROGRAMS SECOND INSERVICE INSPECTION INTERVAL RevIabn 0 P.O. BOX 14000 ISI JUNO BEACH, FLA SUBSEQUENT INSERVICE EXAMINATIONPLAN February 3, 1995 33408 FOR (407) 694%181 PRESSURIZER INSTRUMENT NOZZLES 2.5 ULTRASONIC CAUBRATION BLOCK FPL has fabricated an ultrasonic calibration block (mock-up) of the pressurizer instrument nozzle for the conduct of these reexaminations.

2.6 INSPECTION SCHEDULE Commencing with the 1995 refueling outage, which is currently scheduled to begin on September 25, 1995, FPL will perform the initial examination of the four steam space nozzles utilizing the above plan. The reexaminations as required by IWB-2420 (b) will be accomplished as follows:

Second Inspection Interval - Reexamination in the second and third inspection penod

2. Third Inspection Interval - Reexamination in the first inspection period.

File PSL2PRZ95 Page 7 of 11

NUCLE ENGINEERING CSIODE PROGRAMS SECOND INSERVICE INSPECTION INTERVAL Reviabn 0 P.O. BOX 14000 ISI JUNO BEACH, FLA SUBSEQUENT INSERVICE EXAMINATIONPLAN February 3, 1995 33408 FOR (407) 6944181 PRESSURIZER INSTRUMENT NOZZLES 3.0 RECORDS 3.1 General Records and Reports of Inseivice Examination activities (such as Programs, Plans, Schedules, calibration, examination procedures, examination results, final reports, equipment and personnel certifications, corrective actions taken or recommended will be developed a'nd maintained in accordance with IWA4000 of the ASME Boiler and Pressure Vessel Code,Section XI.

3.1.2 INSPECTION ZONES Systems subject to examination have been divided into zones. Each zone is defined by a weld/support location map (see ISI Sketch 02-005-B attached), which identifies and locates each steam space nozzle subject to reexamination within zone 005.

3.2 FINAL REPORTS Following the completion of each Inservice Inspection Activity, FPL shall prepare a Inservice Inspection Final Report. The Final Report will be filed at the St. Lucie site Document Control Center.

This report shall be made available for review by the Enforcement and Regulatory Authority having jurisdiction at the plant site.

3.3 INSERVICE INSPECTION

SUMMARY

REPORT Following the units return to service, FPL shall foiward a Summary Report of the ISI activity to the Nuclear Regulatory Commission. Results of reexaminations conducted during a inspection period on the pressurizer steam space nozzles shall be addressed within the summary report submittal.

File PSL2PRZ95 Page 8 of 11

NSCLEAP, ENGINEERING CSINODE PROGRAMS SECOND INSERVICE INSPECTION INTERVAL Revtshn 0 P.O. BOX 14000 ISI JUNO BEACH, FLA SUBSEQUENT IN SERVICE EXAMINATIONPLAN Febnrary 3, 1885 33408 FOR (407) 6844181 PRESSURIZER INSTRUMENT NOZZLES ST. LUCIE UNIT 2 DATE: February 3, 1995 INSERVICE INSPECTION SCHEDULE CLASS 1 PRESSURIZER STEAM SPACE INSTRUMENT NOZZLE INSPECTION INTERVAL SYSTEM: Reactor Coolant System FIRST SECOND THIRD ZONE NUMBER: 005 PERIOD PERIOD PERIOD

SUMMARY

EXAM. AREA NDE OUTAGE INSTRUCT.

NUMBER IDENTIFICAT METHOD 123 123 123 CAL BLOK ISI Skeich: 02~5-B 022300 672-105A Level Nozzle I 0 deg.

UT X X X Examination to bo performed Inspection perhd once each Mock-Up 022400 672-105B Level Nozzle I 180 deg.

UT X X X Examination to be performed Inspection perhd once each Mock-Up 022500 672-105C UT X X X Examination to be Level Nozzh e 195 deg. performed once each Inspection perhd.

Mock-U p 022600 672-105D Level Nozzle I 345 deg.

UT X X X Examination to be performed once inspection perhd.

each Mock-Up Notes: 1. This Table identifies the schedule of examinations for the Current Second Insefvice Inspection Interval only. The 3rd. reexamination will be incorporated within the Third Inservice Ins paction Interval during the program update as required by 10 CFR 50.55a (b).

Figure 3-1 File PSL2PRZ95 Page 9 of f1

TOP HEAD BOTTOM HEAD 672-105D 672-105-A 672-102 1.0 PRESSURE 1.0 LEVEL 1.0 TEMPERATURE TAP NOZZLE NOZZLE NOZZLE 108-601 D MS-01-20 STUDS 684-108-A 3.0" SAFETY VALVE MN-01-20 NUTS 1.0 LEVEL NOZZLE NOZZLE UPENDING LUGS 90'8 ~ 16.0 MANWAY Gl Hl Dl Al 0

A4 D4 H4 105-651 108-601-C OOO 12.0" SURGE 3.0" SAFETY VALVE gl Cl C4 F4 NOZZLE CONT. ON NOZZLE 0 270' 103-601 82 E2 J2 DWG.02-016 gp. 4.0 SPRAY NOZZLE 90 ZONE 16 CONT. ON F2 C2 C3 F3 DWG.02-025 0H2002 A2 0 0 A3 03dI3 270'08-601-B ZONE 25 OOO 4.0" REUEF NOZZLE o" G3 270'84-108-B CONT. ON A DWG.02-038 UPENDING ZONE 38 LUGS 30 1.0" LEVEL 108-601-A HEATER SLEEVES NOZZLE 672-105C 180 3.0 SAFETY VALVE 1.0" PRESSURE NOZZLE TA NOZZLE FOR DETAIL SEE DWG. 672-105-B 180'ECllON 02-005-A 1.0 LEVEL E-E VIEW A-SECTION A-A NOZZLE SEE DWG.

02-005-A REFERENCE DRAMINGS NOTES CALIBRATION BLOCKS AND MATERIAL FLORIDA POVER 8 LIGHT ST LUCIE UNIT 2 E-71372-651-001 REV. 3 30-HEATERS, SB167-A600 E-71372-661-002 REV. 0 7-NOZZLES TITLEi PRESSURIZER E-71372-671-003 REV. 5 4-STEAM SPACE, SB166-A690 E-71372-671-005 REV. 2 3-WATER SPACE. SB166-A600 DATEi 04/25/94 DLS ZONEi 5 E-71372-676-001 REV. 1 ORAVINO Ma REVISION E-71372-684-001 REV. 1 ISI SKETCH 2998-18708 REV. 0 UT-4A, UT-6, UT-17 02-005-B 3

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~ NUCL&4 ENGINEERING CSINODE PROGRAMS SECOND INSERVICE INSPECTION INTERVAL Revhbn 0 P.O. BOX 14000 IS1 JUNO BEACH, FLA SUBSEQUENT INSERVICE EXAMINATIONPIAN February 3, 1885 33408 FOR

'$407) 88I4181 PRESSURIZER INSTRUMENT NOZZLES END OF DOCUMENT File PSL2PRZ.95 Page 11 of 11

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