ML20083A614

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Advises NRC That Tie Rod Threads in Alloy XM-19 Matl Do Not Require Solution Annealing to Restore Matl Properties.Metal Acceptable W/O Treatment
ML20083A614
Person / Time
Site: Pilgrim
Issue date: 05/03/1995
From: Boulette E
BOSTON EDISON CO.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
BECO-#95-059, BECO-#95-59, NUDOCS 9505110077
Download: ML20083A614 (10)
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h Boston Edison Pagom Nuclear Power Station Rocky Hilt Road Plymouth, Massachusetts 02360 E. T. Boulette, PhD Senor vu President - Nuclear May 3, 1995 BECo Ltr. #95- 059 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555 Docket No. 50-293 License No. DPR-35 Core Shroud Modification Request for Additional Information XM-19 Material (UNS S20100)

XM-19 material was selected for the Pilgrim shroud tie rods because of its strength, corrosion resistance in BWR environments, and material properties.

As purchased, this n'aterial is delivered in the solution heat treated condition. This involves heating the material to approximately 2000 F, whais the carbides (Cr23Ce) break down and the component atoms disperse into the matrix. This heating is followed by cooling a rate rapid enough to maintain the dispersion in the matrix. Forced air cooling of the tie rods was selected given the geometry and material properties of XM-19.

Based on information provided by General Electric Nuclear Energy for this specific alloy, air cooling k sufficiently rapid to avoid precipitation of carbides, as has been verified by a number of laboratory tests and experiments. For <xample, data published by EPRI's M.J. Povich and D. E. Broeker in the October 1979 issue of " Material Performance" (National Association of Corrosion Engineers; "The Stress Corrosion Cracking of Austenitic Stainless Steel Alloys in High Temperature Air Saturated Water") show that UNS S20100 is as resistant to corrosive atta ,k in the cold-worked and/or fumace-sensitized condition, as in the fully solution-heat-treated condition. Therefore, air cooling is sufficiently rapid to preserve the corrosioneesistant properties of the material.

In addition, each heat was tested for susceptibility to intergranular stress corrosion cracking in accordance with ASTM A-262, Practi,e E. The material was sensitized at 1250*F (+/-10 F) for one hour and air cooled. After a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> boil in the prescribed solution, a bend test was performed and it was found to be satisfactory with no cracks. A copy of the material certification is attached for your review.

With respect to pessible deleterious effects of cold work due to machining operations, General Electric Nuclear Energy performed a microhardness survey on a representative section of M-19 barstock machined with 5-pitch stub acme threads and deliberately left in as-machined condition. Knopp was read with a 25 gram :oad.

9505110077 950'503 PDR ADOCK 050rM293 0,0 P FDR ,

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Results'are as follows: j Depth (mils) . Raw KHN . Corrected KHN Rockwel!  !

'i 0.6 3r* 357 c36 ,

1.2 ' 3t 325 c32*

1.8 ' 31. 290 c27 2.4 299 274 c24 l 3.0 297 272 c24 l 3.6 284 259 c22  !

4.2 289 264 c23  !

4.8 256 231 b96  ;

. 5.4 266 241 b97.5 6.0 256 231 b96 6.6 254 229 b95.5 .

deep 257  ;

249 f 248 248 (251) 226 b95  !

253 i V 250 6 l

Although there is a measurable gradient in hardness, from the surface, it is very slight. The' microscopic appearance of the surface and adjacent grains do not show any of the smeared metal or other distress that we.s seen in the Type 316 material from previous studies.

l In conclusion, the tie rod threads in alloy XM-19 material do not require solution annealing to restore  !

material properties. The metal is perfectly acceptable without such a treatment.  ;

I b . Y. -th E. T. Boulette, PhD  :

ETB/ RAH /nas/ Rap 95/Shrdmate Attachment cc: Mr. R. Eaton, Project Manager 5 Division of Reactor Projects - 1/11 i Mail Stop: 14D1  ;

U. S. Nuclear Regulatory Commission 1 White Flint North 11555 Rockville Pike  !

Rockville, MD 20852 '

U.S. Nuclear Regulatory Commission Region I 475 Allendale Road King of Prussia, PA 19406 Senior Resident inspector Pilgrim Nuclear Power Station

DUBOSE NATIONAL ENERGY SERVICES, INC.

900 INDUSTRIAL DRIVE // CLINTON, NC 28328

- Certificate of Conformance/ Compliance /CMTR Customer: -

GE NUCLEAR ENERGY Date 12/01/94 Serial No. 39463 D G.E. TECH CENTER Our DC No. 101734 302 HANSEN ACCESS ROAD This material meets the requirements KING OF PRUSSIA PA 19406 of your PO number 528-94T710T

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Description Heat # /

Item Pieces Specification Grade Heat Code 1 4 3 1/2" DIA X 17' R/L ROUND BAR, ANNEALED A9164 ASTM A479-88A XM19 CRUCIBLE HHT LTI SHIPPING LENGTH TOTAL: 70' 6 5/8"

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This material has been supplied in accordance with DuBose National Energy Se rvices , Inc. Quality System Program Rev. 3, dated 06-21-94 in compliance with 10CTR50 APP. B. The contents of the report are correct and accurate and the results are in compliance with the material specification, the code, and the customer purchase order.

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P.O. Box 249 Dublin, Pennsylvania 18917 SHIPPING ADDRESS SOLD TO SHIP TO 120 wLL STREET. DVBuN. PA 18917 Du!30sc Nationc12nc rgy Services, Inc.

P.O. Box 439 Clinton, !!C 203 2L; Attention: Buth Derber-Rich CUST. P. . LA3 REPORT !!O. SHIPMEUT IHVOICE DATE b s L.;-6 9 L- 9 *. '. 21 Ccr.picto 11/2/94 CEECRIPTICf: Prige 1 of 2 h *

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. =.3 A. The :.bove refercnced sample was submitted to cherical content ev:.luation by Spectroscopic .:nd Inert Gas Fusion An:1ysis and it uas found to be in conformance to ASTM A-479, Type XI:-19 and Custencr'c Carbor. requirement. The results are sc fol'.a/c:

ELEME!!T REOUIRED

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TRACE O4572 Certon 0.040 caxi= uni .. 21

!!angcnese 4.00 - 6.00 4.2C Phosphorus 0. 040 maxi:num 0.C30 Sulfur 0.030 niaxirrum 0.002 Silicon 1.00 maximum 0.00 Nickel 11.50 - 13.50 11.55 Chromium 20.50 - 23.50 20.15 Molybdenum 1.50 - 3.00 1.57 Vancdium 0.10 - 0.30 C.11 Mitrogen 0.20 - 0.40 C.;C Colurbium 0.10 - 0.30 0.17 ArnoJ6 L. 21oroff AERCURY CONTAMINATION - During the testing and

( inspection, the product did not come m direct contactMity Accer .n- -e . n;ger with mercury or any of its compounds nor with any mercury containing devices employing a single boundary '

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, ,, J A AUYwoa 2to SIGNATURE I I SUBJECT TO TERMS AND CONDITIONS PRINTED ON REVERSE SIDE OF TMS FORM.

customer COPY-DUPUCATE /6 2 NLd"/f/4CH 2

mj #215:24sassa @@'// 40G/# 0 N O. '17840 (90/[r Ormavece TERZSJ NET . 30 CAYO GE NUCLEAR ENERGY Po* 528-94T710T LABORATORY SHIPPING ADDRESS P.O. Box 249 Dubiln, Pennsylvania 18917 120 MtLL STREET, 0U8ktN. PA 18 17 DUBOSE NATIONAL ENERGY SERVICES, INC. L.T.I. Lab Report #B-94921 P.O. 45873-69 Page 2 of 2

  • AMENDED CERTIFICATION (11/3/94)
3. A Tensile test was performed on the submitted Test Specimen and it was found to be in conformance to ASTM A-479-88a, Type XM-19, Annealed per the following results:

REQUIRED TRACE 44572 Tensile Strength 100,000 PSI 110,276 PSI Yield Strength (.2%) 55,000 PSI 57,644 PSI Elongation (In 2") 35.0% 44.9%

Reduction of Area . 55.0% 69.6%

C. A Hardness test was performed on the submitted Test Specimen and it was found to be in conformance to ASTM A-479-88a, Type XM-19, Annealed per the following results:

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( REQUIRED- LESS THAN RC 30 9^ OtdCDP- 4.'I l CA PEVIEW l TRACE f4572: RB 90.0 F C d

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OATe 4 D. An Intergranular Corrosion Susceptibility test was performed on the submitted Test Specimen (Trace-44572) in accordance with ASTM A-262, Practice E *using L.T.I. Procedure MAS-CORR, Rev. O dated 9/16/92. After a 24-hour boil in the prescribed solution, a bend test was performed and it was found to be satisfactory with no cracks.

NOTE: The above material was sensitized at 12500 F. (+/- 10 0 F.)

for one hour and air cooled. {

The provisions of 10CFR21, 10CFR50, Appendix B and ANSI N45.2 apply to this order.

1 All testing performed in accordance with L.T.I. QA Program, Rev. 9 l dated 1/29/93 as audited and approved by DuBose National Energy Services, Inc.

ERCURY CONTAMINATION During the testing and

( ispection, ttw product did not come m direct contact Arnold L. Boroff

^ with mercury or any of its compounds nor with any g ,

ty As ur ce Man car mercury containing devices employing a single boundary . .

cf containment. '

.4 ( j SUBJECT To TERMS ANo CONDITIONS PRINTEo oN REVERSE SIDE of THIS FORM.

CUSTOMER COPY - DUPUCATE /g2 m- /P //f- d O

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Lgca/, c/  %/ymaoc, No. 127,4o g TER'.22: NET - 30 OAYS GE NUCLEAR ENERGY PO# 528-94T710T LABORATORY SHIPPING ADDRESS P.O. Box 249 Dublin Pennsylvania 18917 120 ulLL STREET, DUBLIN. PA 1s911 DUBOSE NATIONAL ENERGY SERVICES, INC. L.T.I. Lab Report #B-94921 P.O. 05873-69 Page 2 of 2

  • AMENDED CERTIFICATION (11/3/94)

B. A Tensile test was performed on the submitted Test Specimen and it was found to be in conformance to ASTM A-479-88a, Type XM-19, Annealed per the following results:

REQUIRED TRACE 44572 Tensile Strength 100,000 PSI 110,276 PSI Yield Strength (.2%) 55,000 PSI 57,644 PSI Elongation (In 2") -

35.0% 44.9%

Reduction of Area 55.0% 69.6%

C. A Hardness test was performed on the submitted Test Specimen r.nd it was found to be in conformance to ASTM A-479-88a, Type XM-19, Annealed por the following results:

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REQUIRED: LESS THAu RC 30 OdOS2 O t r Emy/ i TRACE #4572: RB 90.0 F fNnW. ' '

r;A7g f D. An Intergranular Corrosion Susceptibility test was performed on the submitted Test Specimen (Trace #4572) in accordance with ASTM A-262, Practice E *using L.T.I. Procedure MAS-CORR, Rev. O dated 9/16/92. After a 24-hour boil in the prescribed solution, a bend test was performed and it was found to be satisfactory with no cracks. .

NOTE: The above material was sensitized at 12500 F. (+/- 10 0 F.)

for one hour and air cooled.

The provisions cf 10CFR21, 10CFR50, Appendix B and ANSI N45.2 apply to this order.

All testing performed in accordance with L.T.I. QA Program, Rev. 9 dated 1/29/93 as audited and approved by DuBose National Energy Services, Inc.

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1 AERCURY CONTAMINATION During the testing and inspection, the product did not come m direct contact Arnold L. Boroff unth mercury or any of its compounds nor with any Qu ity As ur ce Man r mercury containing devices ernp!aying a single boundary ci contamment, . j ,

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$UBJECT To TERMS AND (.ONDITior S PRINTEC ON M VERSE SIDE of THl$ FORM.

CUSTOMER COPY - DUPLICATE /62. #e' /f Uf D

FIEiiE25ssi! N4 ca/g

[ $/ renam, No.12904 8 7777 TERMS: NET. 30 DAYS

.a LABORATORY TESTING INC. '

P.O. Box 249 Dublin, Pennsylvania 18917 SHIPPING ADDRESS EOLD TO 120 wu. sinter. oueuN er ,as,1 SHIP TO DuBosEllational Encrgy Services, Inc. Toolilig Specialists P.O. Box 499 East Fayette Street Clinton, NC 20323 Latrobe, PA 15650 Attentions , Ruth Barbar-Rich Ref: GE PO #520-94T71CT CUST. P.O. LAB REPORT HO. SHIPMENT INVOICE DATE Sd73-69 U-94921 Complete 11/30/94 DESCRIPTION Page 1 of 1 4 pcs. 3-1/2" Dia. x 17'/18' long Bars, (70' ASME Section III, Subsection NG-2540, I 6-5/0") 1309 Edition, No Addenda, ASTfi A-479-8Sa, Type XM-19, Ucat (A9164, Trace 44572A through 44572D (Ultrasonict.11y Inspected)

Referenco: Vendor PO #5672-69 '

Cu?C E Customer PC #528-94T710T c.t. FE ! 5W 1

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The above material was 1001 Ultrasonically inspected in ccccrdance with L.T.I. Procedure UT-NG2584, Rev. O dated 2/24/92 and (4) pieces representing (70' 6-5/8") were found te be acceptable to those requirements.

Testing performed by Russell Spor, SNT-TC-1A, Level II.

The provisions of 10CFR21,10CFR50, Appendix B and ANSI N45.2 apply to this order.

All testing performed in accordance with L.T.I. QA Program, Fev. 10 dated 10/17/94 as audited and approved by DuBose National Energy Services, Inc.

MERCURY CONTAMINAT10N . During the testing and Arnold L. Horoff

(' inspection, the product did not come in direct contact Quality Assurance Manager with mercury or any of its compounds nor with any mercury containing devices employing a single boundary of containment.

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d] AuTma;2tc SsG A @E SUBJECT TO TERMS AND CONDITION: PRINTED ON REVERSE SICE OF Teils FORM.

CUSTOMER COPY DUPLICATE /61_ se w- /fNf N 7

LABORATORY TESTING, INC.

GE NUCMAR ENERGY 120 MILL STREET, DUBLIN, PA 18917 F0# 528-94T710T ULTRASONIC INSPECTION CUS10MER: DuBose Nat. Energy CUSTOMER P.O.: 5873-69 LAB No.: U 94921 DATE RECElVED: 11/29/94 QTY RECEIVED: 4 pcs.(70'6-5/8") ACC.: 70'6-5/8" REJ.: APPROVED TEST PROCEDURE: APPLICABLE SPECS.:

UT NG2584, Rev. O dated 2/24/92

  • ASME Section 111, Subsection NG 2540,1989 Edition, No Addenda n.DuBOS.E,.o e -. :. -

DESCRIPTION OF MATERIAL / STAGE OF MATERIAL AT TIME OF TEST : cA' FApTOr-Y 31/2" Dia. x 17'/18' long Bars, ASTM A-479-88a, Type XM-19, }

Heat #A9164, Trace #4572A through #4572D rf/gO M_:

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TEST DIR.: Longitudinal EQUIP. MFG: Sonic MODEL No.: Mark 11 SERIAL No.: 11023E

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, TRANS MFG.: Technisonic MODEL No.: ILD-0206-GP l

SERIAL No.: E-8808 SIZE: .750" FREQUENCY: 2.25 MHz  ;

CABLE LENGTH: CAllBRATION STD #: Production Piece DESCRIPTION: N/A CAllBRATION STD FINISH: PRODUCTION FINISH: IMMERSION N/A <250 RMS CONTACT X (TAC-tlc 76)

SCANNING SPEED: COUPLANT: REFERENCE LEVEL :

40 SIPS {

Water 80% F.S.H.

AREA GATED: DEFECT ALARM LEVEL: RECORDING EQUIP (if used):

  • See Below 30% of Reference General Scanning RS6-SP

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ADDITIONAL INFORMATION (if necessary):

  • 1st Gate Back Reflection and 2nd Gate from center of bar to just before 1st back reflection. '

ULTRASONIC INSPECTOR d ,2 ,// Q DATE OF INSPECTION: 11/30/94 Russell Spor, SNT TC 1 A. Level 11 PAGE 1 OF 1

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HHT OTTICE:4201 Robertson Sc P.O. Bas 30070 PLANT:4111 Robenson Sc Houstan.TX 77249 PLANT:1301 Hays St Phone: G13) 691-4544 Housion.TX 77009 FAXs: 0 13)691 1923 or nucLzAn ruraar CERTIFICATION OF PROCESS Po# 528-94T710T (458290) $'$raday27-OCT-199410:05 h 86689 NATIONAL SPEC ALLOYS INC 1320 UPLAND HOUSTON TX 77043 Cusiomer P.O.e; Other Canoen sa #: 61sterial and Condaion:

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HHT-HT-001 XM-19 HHT QC MANUAL DATED 05/31/91 PROCESS TEMPERATURE QUENCH DATE HRS /AT HEAT HRS / TOTAL SOL ANN 1093C / 2000F AIR 10-26-94 01.00 07.00 v

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