ML20012B008

Summary of 900222 Meeting W/Util in Rockville,Md Re Licensee IGSCC Insp Plans for Upcoming Refueling Outage,Scheduled to Begin on 900331.Hydrogen Chemistry Program Cannot Be Used to Reduce Number of Weld Insps.List of Attendees Encl

ML20012B008
Person / Time
Site:	FitzPatrick
Issue date:	02/26/1990
From:	Labarge D Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 9003130211
Download: ML20012B008 (16)

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• February 26, 1990 E @a s

,y iN!i Docket No. 50-333-pw LICENSEEE Power Authority of the State of New York (PASNY) e FACILITY: James A. FitzPatrick Nuclear Power Plant

SUMMARY

OF MEETING HELD ON FEBPUARY 22, 1990-TO DISCUSS INTERGRANULAR STRESSCORROSIONCRACKING(IGSCC)INSPECTIONPLANS The meeting was held at the One White Flint North Office in Rockville, i

Maryland. A list of attendees is attached as Enclosure 1.

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Enclosure'2.is the reference material supplied by the licensee. All topics;on the agenda were addressed during the meeting.

By letter dated January 29, 1990, the licensee described its inspection for the upcoming refueling outage (scheduled to start on March 31,1990) plans relating to IGSCC inspections. This document scs discussed at the meeting, especially the plans to take credit for the hydrogen water chemistry program to reduce the number of weld inspections. The result was that, since NRC analysis-of hydrogen water chemistry applicability is not yet complete, the program cannot be used to reduce the number of inspections.

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As a result of the discussion of the data which the NRC needs to assess the results of-the IGSCC program, the licensee expects to be able to enhance the l

submittals.

In addition, the licensee will address the Inservice Inspection connents raised in the recent SALP report in its response to the report.

l.

The NRC will continue its evaluation-of.the licensee's response to Generic Letter 88-01 concerning-IGSCC and a related letter, dated August 19, 1988, describing the Resistance Heating Stress Improvement (RHSI) applied to two recirculation system welds.

ORIGINAL. SIGNED By, David E. LaBarge, Project Manager-Project Directorate I L Division of Reactor Projects - I/II Office of Nuclear Reactor Regulations n

Enclosures:

Distribution:

1.-

List of Attendees (Doctet E1Je g CVogan

-2.

Reference Material PDI-1 Rdg OGC NRC/ Local PDRs EJordah cc w/ enclosures:

RCapra JLinyille L: '.

Licensees / Attendees / Service List DLaBarge ACRS(10)

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PDI-1 PDI-1 h PDI-1 f CVogan DLaBarge:rse RAcapra

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Po$er Authu) m. of the State of New York Porer Plant dues A. Fit 2 Patrick Nuclear c.

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Mr. Gerald C. Goldstein

.l Assistant General Counsel Ms. Donna Ross Power Authority of the State New York State Energy. 0ffice of New York:

2 Empire State Plaza 1633' Broadway 16th Floor-New York, New York 10019.

Albany, New York 12223 L

Resioent inspector's Office U. S. Nuclear Regulatory Commission Regional Administrator, Region 1_

Post Office Box 136 U. S.. Nuclear Regulatory Commissiom Lycoming, New York 13093 475 Allendale Road

. King of Prussia, Pennsylvania.

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Mr. William Fernandez Resident Manager Mr. A. Klausman' James A. Fit: Patrick Nuclear.

Senior Vice President - Appraisal Power Plant-and Compliance Services-Post Office Box 41 Power Authority _ of the State i;

of New York Lycoming New York 13093 1633 Broadway New York, New York 10019 Mr. J. A. Gray,. Jr.

Director Nuclear Licensing - BWR Mr. George Wilverding,-Manager-Power Authority of the State Nuclear Safety Evaluation l

uf New York Power Authority of the State s

123 Main Street of New York 123 Main Street White Plains, New York 10601 White Plains, Hew York 10601 Supervisor-fir. R. E. Beedle Town of Scriba R. D.,#4 Vice President Nuclear Support Oswego, New York 13126 Power Authority of the State of New York 123-Main Street i

ifr. J. P. Bayne, President White Plains,'New York 10601 Power Authority of the State of New York

.i 1633 Broadway ttr. S. S. Zulla New York, New York 10019 Vice President Nuclear Engineering Power Authority of the State of New fork

'ftr. Richard Patch 123 Main :treet Quality Assurance Superintendent White Plains, New York 10601 LJames. A. Fit 2 Patrick Nuclear Power Plant-1 Post Office-Box 41 Lycoming, New York 13093 Mr. William Josiger, Vice President Operations and Maintenance L

Power Authority of the State of New York-Charlie Donaldsen, Esquire 123 Main Street Assistant Attorney General White Plains, New York 10601 New York Department of. Law 120 Broadway flew York, New York 10271 6

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2/22/90 NRC/NYPA MEETING 3

FITEPATR)CK 1Mc REPUEL CUTAGE IOSCC INSPECTION PLANS

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INTRODUCTION

- W. JOSIGER

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1i190 REFUEL CUTAGEIGSCO R. PENNY j

INSPECTION PLANS (H2WC INSPECTION *PEQUENCY) til.

CRACK GROWrH EVALUATIONS R. PENNY AND WELD OVERLAYS -

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MISCELLANEOUS ISI & IGSCC ITEMS ALL Ia RECENT SALP REPORT (ISI) e

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HYDROGEN WATER CHEMISTRY (HWC) PROGRAM 1

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. - NYPA HAS INSTALLED:

Hydrogen Addition System

.i Crack Arrest Verification System i

Chemistry Sampling Panels Total cost

$7,000,000 l

OPERATED ON HWC SINCE JANUARY 1989

. -ADOPTED EPRI HYDROGEN WATER CHEMISTRY GUIDELINES-L

.. RESULTS:-

Electrochemical Potentialin Compliance > 90%*

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Conductivity, Chlorides, Sulfates in Compilance > 90%

i Crack Growth of 304 SS, INC 182, Reduced > 10 fold *'

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NYPA REQUEST FOR ISI CREDIT SUBMITTED

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NRC/NYPA DISCUSSION UPCOMING IGSCC INSPECTIONS

-FITZPATRICK 1990 REFUEL OUTAGE DISCUSSION II' IGSCC INSPECTION PLANS i

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DISCUSSION'0F INSPECTION PLANS t

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. AUTHORITY'S TECHNICAL BASIS FOR H2WC RELIEF h

lCAV SYSTEM - ECP SYSTEM-1 NRC. CONCERNS

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L HYDROGEN WATER CHEMISTRY (HWC) PROGRAM L

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e - NUREG 0313 MENTIONS ISI CREDIT FOR HWC

. NYPA SPENT $7M INSTALLING:

n Hydrogen Addition System j

' Crack Arrest Verification System Chemistry Sampling Panels

. OPERATED ON HWC SINCE JANUARY 1989

. ADOPTED EPRI HYDROGEN WATER CHEMISTRY GUIDELINES e RESULTS:

1 Electrochemical Potentialin Compliance > 90%

Conductivity, Chlorides, Sulfates in Compliance > 90%

Crack Growth of 304 SS, INC 182, Reduced > 10 fold

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• NYPA REQUEST FOR ISI CREDIT SUBMITTED & CONCERNS EXPRESSED 1

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INSPECTION PROGRAM ~ HIGHLIGHTS

' CORE SPRAYLOVERLAYS'TO BE INSPECTED IN 1991 NOT 1990, SURFACE FINISHED - INSPECTED IN FALL, 1989-MAINT OUTAGE INSPECTION PLAN CONSOLIDATED FOR ALARA Y

CATEGORY E WELDS-ONE INSPECTED 1988, ONE IN FALL, 1989 PLANNED INSPECTION IN 1991.

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CATEGORY F WELDS-ONE INSPECTED IN 1988, ONE INSPECTED FALL,-1989 (CALLED NOT CRACKED)- ONLY ONE WELD REQUIRES l

INSPECTION, BOTH TO'BE INSPECTED IN 1991 r

JET PUMPiASSEMBLY.0VERLAYS, INSTALLED IN 1988 AND INSPECTED AT THAT TIME (2)-

NOT SCHEDULED FOR INSPECTION UNTIL-1991 l0NE. JET PUMP ASSEMBLY INSPECTED EACH OUTAGE. (5 WELDS TOTAL) l i

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SUMMARY

ITEMS REQUIRED CRACK GROWTH EVALS - IF DATA DOES NOT CHANGE?

WELD OVERLAY DESIGNS a

SHRINKAGE AND STRESS EVAL. ON UNCRACKED WELDS

-AFTER OUTAGE SUBMITTAL ACCEPTABLE (WITHIN 1 MONTH)?

JAF USES CONSERVATIVE BOUNDING, SHRINKAGE STRESS,'IN CRACK GROWTH EVALUATIONS TIMEFRAME FOR NRC' REVIEW 7-5 WORK DAYS, ETC?

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SALP CONCERNS L

CRACK GROWTH EVALUATIONS NOTED BY NRC EVALUATIONS =IN ACCORDANCE WITH NUREG 0313.

f NINE WELD OVERLAYS - SURFACE FINISHIl!G DELAY

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t NUREG 0313 ALLOWS OVERLAYS TO BE INSTALLED ON SHORT j

TERM BASIS - PAGE_3.3, SECTION 3.2.1 UT' INSPECTION, SECTION 5.0 or NUREG, WOULD.HAVE BEEN COMPLETED DURING 1990 OUTAGE AT WHICH TIME REPAIRS WOULD HAVE BEEN " CONSIDERED LONG TERM".

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Table 1 1 IGSCC Inspection Summary 1

No. of Wolds No. of -

No. of Welds using Modified NUREG--

Welds in Schedu ed for HWC Inspect.

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. Category -

Category inspection Frequency Notes l

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- A-26-2 2

Only one 7

weld inspection i

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Note 1 C*-

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Note 1 D'

32-16 13 Note 2 E-20 7

5 Note 3

- F-2 1

2 Note 4 1

G 3-3 3

151 41 31 t

A.

' Long seams are included in. Category A, but are not noted as such.' The long seam welds are inspected when the circumferential weld is inspected.

C.

All Category C welds were inspected in 1987 or 1988. The welds are scheduled on a

--basis of 100% in 10 years.

C 3.-

Welds with high stress, lHSI has been performed and the three welds were inspected in.

l the 1988 refueling outage. See Reference 10 for the Authority's position on these welds.-

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. - f-C*.

Welds with Resistance Heating Stress Improvement performed as noted in Reference 5.

Both welds were inspected in the 1988 refueling outage..

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Total overlaid welds in Category E are eighteer The other two welds contain IGSCC and

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t ATTACHMENT 1 The Authority had scheduled a total of 41 welds for inspection during the 1990 refueling outage.

Due to the implementation of a Hydrogen Water Chemistry Program and the modified inspection frequency allowed per NUREG-0313 Revision 2, Paragraph 2.3.1, the number of welds to b6 inspected has been reduced by 10..Occuoational radiation exposures are expected to be cut by approximately 16 person rems as a direct result of the reduced number of welds.

l Table 1 1 details the summary of welds per category that are' susceptible to Intergranular Stress Corrosion Cracking (IGSCC) at the FitzPatrick plant and establishes the basis for inspecting 31 welds during the 1990 refueling outage.

It is noteworthy that 92 welds out of a weld population of 151 were inspected in the 1988 refueling outage. During the 1989 maintenance outage, as detailed in Reference 11, two welds that had 3

IGSCC were inspected as part of a mid cycle inspection required by References 6,7, and 9.

These inspections revealed no significant !G 3CC growth, s

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NOTES TO TABLE 1 1 i

NOTE 1 -

All welds in this category have been mitigated by Inductive Heating Stress Improvement (IHSij. Hydrogen water chemistry is also an added mitigation factor in-reducing susceptib'lity to IGSCC. The Authority requests that the weld inspection frequency be decreased by a facior of two for this refueling outage as allowed by.

3 NUREG 0313 Rev. 2, paragraph 2A1.

This will decrease weld inspections from 12 to 6 welds. All welds in this category have been inspected in either 1987 or 1988 (56 welds in 1988; 8 welds in 1987).

NOTE 2 -

This category includes 12 Reactor Recirculation System safe end to nozzle welds which contain inconel 182 weld metal and are currently protected by hydrogen water chemistry. Six of these welds are scheduled for inspection during this outage. The Authority requests that the weld Inspection frequency be decreased by a factor of two for this refueling outage as allowed by NUREG 0313, Rev. 2, paragraph 2.3.1.

Two other nozzle to safe end welds, Core Spray _"A" and Jet Pump *B," will be 1

inspected during this outage. Thus live safe end to nozzle welds will be inspected.

' All these welds were inspected in 1987 or 1988 with no IGSCC noted. Granting of -

this relief by the NRC would result in an inspection decrease from 8_to 5 nozzle to -

i safe end welds. Significant ALARA savings are anticipated as the vessel nozzle

.inspMtions are labor intensive due to the vessel bio shield doors and insulation system located on the nozzN in addition to the 5 nozzle to safe end welds, the Authority will inspect 8 more Category D welds. A total of 13 Categcry 0 nelds in all will be inspected, i

NOTE 3 -

l Category E welds iriclude welds that have been weld overlaid (18 total) and welds with IGSCC that have been lHSI treated (2 total) and comply with NUREG 0313 Rev.

2, paragraph 4.5.

? As detailed in Reference 12, three weld overlays on the Core Spray *B* loop were surface finished and inspected during the 1989 fall maintenance outage. In order to.

consolidate the Core Spray System overlay inspections on a refueling outage basis.

due to Al. ARA considerations, the Authority plans to inspect these welds on an alternating refueling outage basis, l. e.1991,1995 etc., starting with the 1991 j; _.

refueling outage.

4 Currently, NUREG 0313 Rev 2, requires inspection of weld overlays at a frequency of -

100% in two refueling outages with 50% required in the first refueling outage after installation. The remaining 15 weld overlays were inspected in the 1987 refueling outage or after installation during the 1988 refueling outage. TMeen of the weld overlays are on the Reactor Recirculation System and are mitigated by hydrogen iP water chemistry. The two remaining Reactor Recirculation System overlays are on the jet pump instrument nozzle assembly. A hydrogen water chemistry injection system was installed in September 1989 to protect the jet pump instrument nozzle assembly welds.

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The two welds in this category (12 4 and 28 33) that contain IGSCC were inspected

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fJ during the 1988 refueling outage. One was re inspected during the 1989 maintenance outage with no significant crack growth noted. These welds do not '

require inspection, according to NUREG 0313 Pee. 2, until the 1991 refueling

.1 outnge.

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_ The Authority proposes that the inspection eye!e of weld overlays be decreased by a ~

factor of two for the 15 weld overlays on the Reactor Recirculation System and the 4

f jet pump instrument nozzle assembly based on the mitigating effects of hydrogen wmer chemistry. The Authority will inspect the two cracked welds as discussed W;Si above to demonstrate the mitigating effects of hydrogen water chemistry even '

gEI though these welds do not require inspection. This will also allow the Authority to l

implement an inspection plan for the 15 weld overlays on the Recirculation System

.on a schedule of 3/4/4/4 15 tota' on a refueling outage basis.

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. This requires ielief from the Category.E requirement of inspection of weld overlays '

1 from 100% in two outages to 100% in four outages. The weld overlay metal,308L

with ferrite > 7.5FN,is extremely resistant to IGSCC. The compressive residual stress of the weld overlay process has also been thown to stop crack growth in.

laboratory tests. Finally, the hydrogen water chemistry effect provides added protection from IGSCC.

NOTE 4-This category contains two welds (28 53,28-112). Both welds were inspected

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during the 1988 refueling outage. Weld 28112 was inspected during the 1989 fall

. maintenance outage. This weld was determined not to contain IGSCC by two Independent examiners (EBASCO and NYPA). The Authority will continue to classify this weld as Category F until the next scheduled inspectiori (1991 refueling outage).

If it is determined that no IGSCC exists at this time, this weld may be upgraded to' t

ll Category C.

i Only one weld requires inspection during this outage, but if the HWC relief is -

approved as detailed in the previous notes, both welds will be inspected.

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INSPECTION PROGRAM HIGHLIGHTS

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CORE SPRAY OVERLAYS TO BE INSPECTED IN 1991 NOT 1990 SURFACE FINISHED INSPECTED IN FALL, 1989 MAINT OUTAGE INSPECTION PLAN CONSOLIDATED FOR ALARA CATEGORY E WELDS-ONE INSPECTED 1988, ONE IN FALL, 1989

. PLANNED INSPECTION IN 1991.

CATEGORY F WELDS-ONE INSPECTED IN 1988, ONE INSPECTED FALL, 1989 (CALLED NOT CRACKEDi ONLY ONE WELD REQUIRES

, INSPECTION, BOTH TO BE INSPECTED IN 1991-JET' PUMP ASSEMBLY OVERLAYS, INSTALLED IN 1988-AND INSPECTED AT THAT TIME (2)

NOT SCHEDULED FOR INSPECTION UNTIL 1991 ONE JET-PUMP ASSEMBLY INSPECTED EACH OUTAGE (5 WELDS TOTAL) 5

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