ML20215D107

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Summary of 860911 Meeting W/B&W Owners Group Steam Generator Committee Re Ongoing Activities.Viewgraphs & Attendance List Encl
ML20215D107
Person / Time
Issue date: 10/02/1986
From: Paulson W
Office of Nuclear Reactor Regulation
To:
Office of Nuclear Reactor Regulation
References
NUDOCS 8610100676
Download: ML20215D107 (36)
v • d • e


Text

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October 2, 1986 LICENSEE: Babcock & Wilcox Owners Group (BWOG) Steam Generator Committee

SUBJECT:

SUMMARY

OF SEPTEMBER 11, 1986 MEETING TO DISCUSS BWOG STEAM GENERATOR COMMITTEE'S ACTIVITIES On September 11, 1986, the NRC staff met with representatives of the BWOG

- Steam Generator Comittee. This meeting was requested by the owners group to discuss their ongoing activities. Enclosure 1 is a list of meeting attendees. Copies of viewgraphs provided by the owners group are also enclosed (Enclosure 2).

The purpose of the BW0G Steam Generator Comittee is to maintain steam generator reliability. The comittee has nine areas under consideration:

(1) secondary side fouling; (2) corrosion assisted fatigue (lane region);

(3) fretting; (4) tube diameter distortions; (5) intergranular attack - lower tube sheet; (6) erosion; (7) intergranular attack - upper tube sheet; (8) primary side corrosion; and (9) component fatigue. The steam generator comittee has ten projects to address these problem areas as shown on Table 1 of Enclosure 2.

Two projects were discussed by the BWOG Comittee: (1) water slap cleaning of the steam generator; and (2) once-through steam generator (OTSG) sleeving.

Water slap is a technique used to clean steam generator fouling. The owners group considers the water slap technology to be proprietary. The owners group feels that the steam generator fouling that has been observed is not caused by in-place corrosion; rather, crud is being carried into the steam generator from the feedwater system. The fouling causes hydraulic problems because not as much feed flow can be pumped in a fouled 0TSG; however, the overall heat transfer efficiency of the steam generator is not affected.

-The presentation on the OTSG sleeving included the sleeve functional requirements, sleeve design, and tooling. Currently, about 500 sleeves are being installed at Rancho Seco.

Walter A. Paulson, Technical Assistant to the Assistant Director Division of PWR Licensing-B

Enclosures:

As stated 7DM DP

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WPaulson:ps 10/y/86 8610100676 861002

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PDR TOPRP EMVDW C

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i' MEETING

SUMMARY

DISTRIBUTION LIST' cket/ Central File NRC PDR~

L. PDR

.AD Reading File W. Paulson OELD E.' Jordan B.~ Grimes

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'ACRS 10 B. Borsum F. Miraglia/F. Schroeder L. Marsh J. Calvo' C. Thomas W. Regan-J. Taylor.(B&W)

J. 'Stolz'

,G.-.Vissing NRC Participants C. Y. Cheng R. J. Wright K. R. Wichman C. Y. Liang D.--Solberg J. Rajan D. Crutchfield T. M. Ross

0

,s ENCLOSURE 1 ATTENDANCE LIST SEPTEMBER 11, 1986 MEETING - NRC STAFF AND B&W OWNERS GROUP STEAM GENERATOR COMMITTEE Name Organization W. Paulson NRC/PWR-B C. Y. Cheng NRC/NRR/PWR-B/EB R. J. Wright NRC/NRR/PWR-B/EB K. R. Wichman NRC/NRR/PWR-B/EB C. Y. Liang NRC/NRR/PWR-B/RSB D. Solberg NRC/RES J. Rajan NRC/NRR/PWR-B/EB D. Crutchfield NRR/PWR-B J. T. Enos Arkansas Power & Light Co.

J. H. Snider B&W T. M. Ross

'NRC/NRR/PWR-B/PM D. L. Tate B&W J. Lovett SMUD L. Bohn B&W L. V. Parscale Arkansas Power & Light Co.

G. Capodanno GPU Nuclear G. Cowles Florida Power Corp.

R. W. Eaker Duke Power R. C. Post B&W H. A. Mahlman Tenn. Valley Authority l

O l

l l

ENCt05URE 2 I

B&W OWNERS GROUP i

t STEAM GENERATOR COMMITTEE f

PRESENTATION TO NRC

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SEPTEMBER 11, 1986 1--,,,--v.c,..--

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+

AGENDA I.

INTRODUCTION H.A.

MAHLMAN B&WOG ORGANIZATION PURPOSE /0BJECTIVES PROGRAM PLAN l

II.

PROGRAM L.V.

PARSCALE INFORMATION/ TECHNOLOGY i

TRANSFER COMMITTEE PROJECTS i

III.

SELECTED PROJECTS

- WATER SLAP CLEANING G.T.

COWLES OTSG SLEEVING i..H.

B0HN IV.

SUMMARY

H.A.

MAHLMAN

1 88W O WN ER S GROUP MEMBERSHIP

=

Arkansas Power and Light C o.

Duke Power Co.

Florida Power C orp.

General Public Utilities Socramento Municipal Utilities District Toledo E dis on C o.

Tennessee Valley Authority Washington Public Power Supply System 9

i 3-

.,.___.--,__,,,m..r.,__.-,._..__,_.___.,..,,_..,,-..-,_..m_,,-.,_-

PURPOSE The BBW Owners Group Steam Generator Committee was established to identif y problem, and solutions to problems, related to the operation of the B&W designed Once Through Steam Generator in order to achieve high plant ovallobility, improve safety.ond reduce operating costs.

I l

e STEAMGENERATORCOMMITTEEPROGRANOBJECTIVES PREVENTPROLONGE0PLANTSHUTD0WNSORSTEAMGENERATOR REPLACEMENT.

MINIMIZEFORCE00UTAGESCAUSEDBYSTEAMGENERATORPROBLEMS.

AV010POWERRE0UCTIONSOVETOSTEAMGENERATORPROBLEMS.

MAXIMIZESTEAMGENERATOROPERATINGLIFEANDPROVIDEPROTECTION FROMCURRENTLYKNOWNFORMSOfDEGRADATION.

IDENTIfYNEWPROBLEMAREASASTHEYARISE.

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l PROGRAMPLAN DEflNESPROBLEMS PROVIDES HITORICAL TECHNICAL & COST DATA FOR PROBLEMS DEflNES STRATEGY FOR PROBLEM RESOLUTION

. DEflNES ACTIVITIES TO BE PURSUE 0

. PROVIDES ACTIVITY STATUS IDENTIFIESRLATEDACTIVITIESOf0THERCOMMITTEES

.PERIODICALLYREVISEDASCIRCUMSIANCESCHANGE l

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PROGRAM 1.

INFORMATION/ TECHNOLOGY TRANSFER 2.

COMMITTEE PROJECTS 4

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-INFORMATION/ TECHNOLOGY TRANSFER

' KEY WORD:-

COMMUNICATION INTRA-COMMITTEE MEETINGS 4

0TSG TRAI.NING COURSE UTILITY-REPORTS PLANT-TO-PLANT TRENDING 1

INTER-COMMITTEE NDE/ AVAILABILITY i

f STEERING COMMITTEE 1

J-EXTERNAL-VENDORS t'

m NRC 4

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I EPRl/SG0G i

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UTILITY EXPERIENCE REPORT Utilny Reported By Plan:

Date Current Status Normal operation Fuel cycle no.

Off normat operation Scheduled outage O Yes D No Forced outage O Yes O No Duration Duration Planned Duration Report:

s N

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e 6

CPe?96

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COMMITTEE PROJECTS KEY PHRASE:

COMBINED EFFORTS TO ADDRESS INDUSTRY CONCERNS 9

AREAS UNDER CONSIDERATION SECONDARY SIDE F0ULING CORROSION ASSISTED FATIGUE (LANE REGION)

FRETTING

- TUBE DIAMETER DIST0RTIONS IGA LTS EROSION IGA UTS PRIMARY SIDE CORROSION COMP 0NENT FATIGUE 10 PROJECTS TQ ADDRESS THESE AREAS

'0THER PROJECTS SG REPLACEMENT DOCUMENT

- ADMINISTRATIVE SUPPORT 0TSG SECONDARY SIDE M0CKUP MAINTENANCE f

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9 TABLE I SumARY or oTSC PRostEn AREAS AMO PROJECT APPLICABILITY

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PROJECT l SECONDARY l CORROSION l FRETTING l TURE l INTERCRANUI.AR l EROS IOWl INTERCR ANUU R l P!ilflA n l CC::

l SIDE l ASSISTED l WEAR l DIAMETER l ATTACK AT l ATTACK AT l SIDE l F AT !GM,'

l FOULING l FATICUE l

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i. WATER SLAP ENKANCEMENT l

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3. ENGINEERING EVALUATION OF l

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ruxE SPALLING PHENOMENON TCR l

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6. PLANT-TO-PLANT TR,ENDING REPORT l YES l

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7. TUsESHEET StuDCE uMCING l -YES l

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8. HICH-TEnPERATURE POLISHER SYSTEM.l YES l

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9. PROCESS RETIMEMENTS TO VISUAL YES

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l BABC0CK s WILCOX OWNERS GROUP STEAM GENERATOR COMMITTEE PRESENTATION ON WATER - SLAP SEPTEMBER 11, 1986 Presented By:

Gerry Cowles Florida Power Corp.

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WATER-SLAP OUTLINE OF PRESENTATION 1.

BACKGROUND OF PRESSURE DROP PROBLEM 2.

HOW WATER-SLAP IS ACCOPPLISHED

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3.

DESCRIBE WATER-SLAP EQUIPMENT 4.

RESULTS OF WATER-SLAP 5.

FUTURE APPLICATIONS OF WATER-SLAP t

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i STEAM GENERATOR FOULING CHARACTERISTICS INFORMATION BASED ON VIDEO INSPECTION AND SAMPL 1.

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FOULING IS ALSO A COATING BUILT-UP ON TUBES.

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PRESENTATION COVERS:

OTSG OVERVIEW SLEEVE REQUIREMENTS SLEEVE DESIGN SLEEVING HISTORY TOOLING OVERVIEW.

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OTSG SLEEVING FUNCTIONAL REQUIREMENTS o

INSTALL IN ANY TUBE o

SPAN DEFECTS o

MINIMIZE RADIATION EXPOSURE (75 Mn/ SLEEVE)

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- SIMPLE, RAPID PROCESS l

0 LEAK TIGHT JOINTS (0.1 GPM FOR 10,000 SLEEVES)

OTSG SLEEVING FUNCTIONAL REQUIREMENTS (CONTINUED)

MEET ALL STRUCTURAL DESIGN REQUIREME o

FOR OTSG SLEEVE MATERIAL RESISTANT TO DAMAGE o

MECHANISM AND COMPATIBLE WITH EXISTING I600 TUBE INSPECTABLE BY EDDY CURRENT o

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OTSG SLEEVE EXPERIENCE / HISTORY INSTALLED 10 SLEEVES IN ANO-1 DECEMBER 1984 RAN PROVING RUN IN LYNCHBURG

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MOCKUPS AUGUST 1985 INSTALLED 2 REMOTE STABLIIZERS l

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IN OCONEE CURRENTLY INSTALLING APPROXIMATELY 500 SLEEVES (PREVENTIVE SLEEVING)

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SLEEVING PROVING RUN OBJECTIVE:

FIELD HARDEN EQUIPMENT, PROCEDURES l

AND PERSONNEL BY SIMULATING FIELD CONDITIONS.

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