ML20086E831
| ML20086E831 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 06/09/1995 |
| From: | Ahmann R, Schrag M, Trovato J GENERAL ELECTRIC CO. |
| To: | |
| Shared Package | |
| ML19325F570 | List: |
| References | |
| 25A5719, NUDOCS 9507120274 | |
| Download: ML20086E831 (11) | |
Text
_ _ _ _ _ _ _ _ _ _ _ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
I ATTACllMENT 8 ,
GENE SPECIFICATION 25A5719, REVISION 0 FABRICATION OF SIIROUD STABILIZER '
FABRICATION SPECIFICATION IIATCII UNIT 2 JUNE 1995 l
l 9507120274 950703 PDR ADOCK 05000366 p PDR t
l . .
GM&% 25A5719 SH NO.1 REVISION STATUS SHEET DOCUMENT TITLE FAllRICATION OF SIIROUD STABILIZER LEGEND OR DESCRIPTION OF GROUPS 'nTE: FABRICATION SPECIFICATION F M F: HATCII 2 MPL NO: PRODUCT
SUMMARY
SECTION 7 TIIIS ITEM IS OR CONTAINS A SAFE'IYREIATED ITEM YES X NO EQUIP CIASS CODE P REVISION l C 0 RM4)2121 JUN 0 91995 1
i l
l l
PRINTS TO MADE IW g y yo f777 APPROVALS GENERAL ELECTRIC COMPANY g, 9I 175 CURTNER AVENUE M. R. SCilRAG M. R. SCIIRAG SAN]OSE CALIFORNIA 95125 ClIKD llY: y[ yp ISSUED - :-
J. L. TROVATO R. J. AliMANN k CONT ON SHEET 2
gg 25A5719 SH NO. 2
- 1. SCOPE 1.1 This specification defines the requirements for fabrication of the shroud stabilizer hardware. These requirements apply as described herein to wrought austenitic stainless steels, types 304,304L,316,316L, XM-19 and Ni-Cr Fe alloy X-750 materials.
1.2 Definitions Buyer - General Electric Nuclear Energy (GENE)
Fabricator - The supplier authorized by GENE to perform fabrication senices for the hardware items comprising the shroud stabilizers.
- 2. APPLICABLE DOCUMENTS 2.1 GE Nuclear Enerev Documents. The following documents form a part of this specification >
to the extent specified herein. In case of any conflict between this document and any of the following, the requirements of this document shall govern,
- a. P50YP102 Arc Welding of Austenitic Stainless Steels
- b. P50YP211 Cleaning and Cleanliness Control of Reactor System Components
- c. E50YP20 Determination of Carbide Participation in Wrought Austenitic Stainless Steels
- d. E50YP11 Examination for Intergranular Surface Attack i
- e. E50YP22 Liquid Penetrant Examination
- f. Y1010A3 Shop Applied Practices
- g. P10JYP2 Age Ilardening of Ni-Cr-Fe Alloy X-750
- h. E50YP13 Sensitization Tests for Austnitic Stainless Steel Modified ASTM A-262 Practice E
- i. P161WP3 (Rev 6) Chromium Alloy Coating " Electrolyzing" 2.2 Codes and Standards. The following codes and standards (issue in effect at the date of the purchase order, or as specified in this specification or its supporting documents) form a part of this specification to the extent specified herein.
l
gg 1.5A5719 SH NO. 3 2.2.1 American Society of Mechanical Eneineers (ASME) Boiler and Pressure Vessel Code
- a.Section III, Subsection NG, Core Support Structure,1989 Edition
- b. deleted 2.2.2 American Weldine Society (AWS) Standagl3
- a. AWS-A2.4, Symbols for Welding and Nondestructive Testing
- b. AWS-A3.0, Terms and Definitions 1
2.2.3 American Society for Testine and Materials (ASTM) (Year 1986 or later)
- a. ASTM A 370, Specification for Mechanical Testing of Steel Products !
I
- b. ASTM A-182, Specification for Forged or Rolled Alloy Steel Pipe Flanges, Forged Fittings, and Valves and Parts for Highlfemperature Service
- c. ASTM A-240, Specification for Heat-Resisting Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels
- d. ASTM A-479, Specification for Stainless and Heat Resisting Steel Wire, Bars, and Shapes for Use in Boilers and Other Pressure Vessels
- e. ASTM B-637, Specification for Precipitation Hardening Nickel Alloy Bars, Forgings, and Forging StocA for High-Tempemture Service f, ASTM A 262, Detecting Susceptibility to Intergranular Attack in Stainless Steel
- g. ASTM A 336, Specification for Steel Forgings, Alloy, For Pressure and High-Temperature Parts
- h. ASTM A751, Test Methods, Practices and Terminology for Chemical Analysis of Steel Products
- i. ASTM E-8, Test Methods for Tension Testing of Metallic Materials J. ASTM E 353, Test Methods for Chemical Analysis of Stainless, Heat-Resisting, Maraging and Other Similar Chromium-Nickel-Iron Alloys
$ GENurkarEnergy y'olo Su No.4 2.2.4 US Federal Recister Code of Federal Reculations (CFR)
- a. 10 CFR 50 - Title 10, Energy; Chapter 1, Nuclear Regulatory Conunission; Part 50, Licensing of Production and Utilization Facilities, Appendix II, Quality Assurance Criteria for Nuclear Power Plants.
- b. 10 CFR 21, Reporting of Defects and Noncompliance
- 3. REQUIREMENTS 3.1 General. This specification is for use in conjunction with detail product drawings which define the requirements for each part of the shroud stabilizers. It is intended that all parts will be fabricated without welding.
3.2 Materials. Parts shall be fabricated from materials specified on the detail product drawings and the additional requirements of this specification. The material for each completed part shall be traceable to its certified material test report (CMTR). Physical and chemical overcheck tests are required for each heat number of materialin accordance with: ASTM A-370, ASTM A-751, ASTM E-8 and ASTM E-353 as determined by the procurement QCE. Yield strength and ultimate tensile strength testing is to be performed at both 70 F and 550*F for all X-750 material, and for the XM-19 tie rod material.
3.2.1 X-750 Material. Nickel-chrome-iron (Ni-Cr-Fe) alloy X-750 shall be in accordance with ASTM IL637, UNS N07750, Modified Type 3 as amended by the requirements specified below.
3.2.1.1 X-750 Maximum Cobalt. The maximum cobalt content of Ni-Cr-Fe alloy X-750 material shall be 0.090 percent.
3.2.1.2 X-750 liot Forming. Ni-Cr-Fe alloy X-750 shall be hot formed in accordance with a buyer approved fabricator's procedure.
3.2.1.3 X-750 Ileat Treatment. Ni-Cr-Fe alloy X-750 shall be annealed at 1975 25"F (metal temperature) and forced air cooled after hot forming operations. The center of the cross-section shall be held at this temperature for 60 to 70 minutes. Equalizing heat treatment at 1500 to 1800"F is prohibited. Product forms with cross section dimensions less than six inches by six inches may be water quenched after annealing as a vendor option, and with buyer approval.
Material mechanical tests shall be performed at both 70"F and 550"F, on specimens which have been annealed and age hardened.
3.2.1.4 X-750 IGA Testing. Intergranular attack (IGA) testing per E50YP11 shall be performed, except if a minimum of 0.030 inch of material is removed from all surfaces, or it can be verified that no acid pickling procedures were used, then IGA testing is not required. IGA examination is ,
not required after age hardening.
ggg 1. 5719 SH NO. 5 3.2.1.5 X-750 Ace Ilardening. Ni-Cr-Fe alloy X-750 shall be age hardened at 1300 15"F for 20 hour2.314815e-4 days <br />0.00556 hours <br />3.306878e-5 weeks <br />7.61e-6 months <br /> minimum (21 hours2.430556e-4 days <br />0.00583 hours <br />3.472222e-5 weeks <br />7.9905e-6 months <br /> maximum) and air cooled in accordance with P10pT2D, and a buyer approved procedure. Age hardening may be performed before or after machining as long as the final part meets all dimensional requirements.
3.2.1.6 X-750 Mechanical Pronerties. The minimum yield strength for all X-750 material at 550 "F shall be 92.0 ksi. The minimum ultimate tensile strength for all X-750 material at 550"F shall be 142.5 ksi. Required 70 F properties are in accordance with ASTM B-637, UNS N07750, Type 3.
3.2.2 Austenitic 300 SST. Austenitic 300 series stainless steel shall be in accordance with ASTM A-179, A-182, A-336 or A-240 type 304,304L,316 or 316L with a maximum carbon content of 0.020 percent. The type and applicable ASTM specification shall be as specified on the specific part drawing. The additional requirements below also apply.
3.2.2.1 Austenitic 300 SST Heat Treatment. Austenitic 300 series stainless steel shall be solution annealed at 2000 100"F (metal temperature) for a minimum of 15 minutes per inch of thickness, but not less than 15 minutes total, immediately followed by quenching in circulating water or other buyer approved medium to a temperature below 400"F. The solution anneal shall be performed after completion of final reduction, sizing, and forming operations.
3.2.2.2 Austenitic 300 SST Sensitigation Austenitic 300 series stainless steel shall be tested and shall pass one or more of the following metallographic tests after solution heat treatment: ASTM A-262 Practice A, ASTM A-262 Practice E, E50YP13, or E50YP20. Samples from the stainless steel shall first be artificially sensitized by heating to 1250 25"F for 15 to 20 minutes (types 304/304L) or 1 to 1-1/4 hours (types 316/316L) and air cooled before testing.
3.2.2.3 Alternatives to Water Ouenching. In cases where substitute cooling methods are desired, or where the material is delivered without complete records as to heating temperature, holding time, cooling method, or finish temperature, the results of the sensitization testing of paragraph 3.2.2.2 shall be accepted as proof that the solution heat treatment, no matter how accomplished, is or was adequate.
3.2.2.4 Austenitic 300 SST IGA Testing. Intergranular attack (IGA) testing per E50YPil shall l also be performed, for each heat and heat treatment lot, except if a minimum of 0.030 inch of material is removed from all surfaces after solution heat treatment, then IGA testing is not l required.
3.2.2.5 Austenitic 300 SST llardness. The maximum hardness of austenitic 300 series stainless steel, material and completed parts, shall be R,90 for type 304, R,88 for type 304L and R,92 for types 316 or 316L.
3.2.2.6 Welding. Welding for fabrication, or for material repair, is prohibited.
1 i
l
S" N GElwxisa M *5^5*
g o 6
3.2.3 Xhi-19 Stainless Steel. Type X)f-19 stainless steel shall be in accordance with ASThi A- l 479, A-182, or A-240. The maximum carbon content is limited to 0.040 percent. The applicable l ASThi specification shall be as specified on the specific piece part drawing. The additional I requirements below also apply.
3.2.3.1 Xhi 19 SST IIcat Treatment. Xhi 19 stainless steel shall be solution annealed at 1950"F to 1975"F (metal temperature) for 15 to 20 minutes for each inch of thickness, but not less than 15 minutes regardless of thickness. The material shall be quenched in circulating water to a temperature below 800"F. As a vendor option to avoid distortion, the Xhi-19 tie rods may be air cooled so that the metal temperature is below 800"F within 20 minutes of removal from the furnace. Successful completion of the sensitization testing of paragraph 3.2.3.2 shall be accepted as evidence of the correct solution heat treatment,if time and temperature charts are not available, hiaterial mechanical tests shall be performed at both 70"F and 550"F, on specimens which have been annealed, for tic rod material.
3.2.3.2 Xht-19 SST Sensiti7ation. Each heat and heat treatment lot of Xhi-19 material shall be tested for sensitization in accordance with the requirements of ASThi A-262 Practice E.
3.2.3.3 Xht 19 SST IGA Testing. Intergranular attack (IGA) examination shall be performed for each heat and heat treatment lot in accordance with the requirements of E50YP11. IGA examination is not required if a minimum of 0.030 inch of materialis removed from all surfaces of the product form after final heat treatment.
3.2.3.4 Xhi-19 SST I f ardness. The maximum hardness of Xhi-19 stainless steel material and completed parts shall be R,100.
3.2.3.5 Xhi-19 SST Welding. Welding, for any reason, is prohibited.
3.3 Cutting. Forming. and Cleaning 3.3.1 hiechanical Cutting hiethods. hiethods such as machining, grinding (see also paragraph 3.6) and sawing are acceptable. hiethods such as shearing or punching that form a hardened layer on the metal surface shall not be used, except where the cold-worked material is subsequently and completely removed by machining, grinding, or solution heat treatment.
3.3.2 Thermal Cuttine hiethods. Plasma arc cutting may be used with the following restrictions:
Interpass temperature control shall be in accordance with P50YP102 for stainless steels. If a minimum of 0.12 in of the cut surface is subsequently removed by machining or grinding, the interpass temperature control is not required. Surfaces shall be machined or ground to a bright metal finish following the cutting operation. Preventive measures shall be taken to assure that spatter will not enter areas that are inaccessible to cleaning operations.
f .
ggg 25A5719 SH NO. 7 3.3.3 Bendine and Formine Control for Stainless Steel. There shall be no cold forming, bending, or cold reduction for austenitic stainless steel, unless otherwise specified in the paragraphs below, or the component is subsequently solution heat treated.
3.3.4 Prohibited Processes. Processes such as shot peening, hammering, or power deslagging of final surfaces are prohibited.
3.3.5 Straichtenine. Straightening or reforming shall be performed in accordance with an approved procedure. Minor straightening authorized by manufacturing criteria are authorized provided deformation is controlled in accordance with paragraph 3.3.6.
3.3.6 Control of Deformation. For parts that are straightened, reformed, or othenvise subjected to deformation as part of the normal fabrication process, the following controls shall be met: (1) liardness of any wrought stainless steelin the final fabricated condition shall not exceed the hardness requirements of paragraph 3.2.2.5 or 3.2.3.4 as determined by an approved procedure.
The buyer approved procedure shall include the specification oflocations for hardness testing. If the dimensions of the part permit, the hardness shall be measured with a tester specifically designed to perform Rockwell B measurements. (2) Cold bending strain, after solution annealing, shall be limited to two and one-half percent maximum.
3.3.7 Cleanine and Control of Miscellaneous Process Materials. Miscellaneous process materials include such things as machining lubricants, liquid penetrants, solvents, tapes, ultrasonic testing couplant, abrasive grit, packing materials, marking materials, and other materials which will be in contact with the part being fabricated. The known contaminants of concern are chlorides, fluorides, sulfur, lead, mercury and all metals with low melting points. In addition, when heat treating is involved, all carbonaceous material and phosphates must be considered harmful on stainless steel which can pick up these contaminants. An evaluation of all miscellaneous material is not required provided all machined parts / surfaces are cleaned in accordance with P50YP211 to control contamination.
3.4 lleatine Control for Stainless Steel. Austenitic stainless steel shall not be heated above 800
'F except by thermal cutting unless the process will be followed by solution heat treatment.
3.5 Solution Heat Treatment. Solution heat treatment of complete 300 series stainless steel assemblies, if required, shall be performed in accordance with qualified procedures approved by the buyer and meet the following requirements:
- a. Parts and any fixtures used in the heat treatment shall be visibly clean prior to heat treatment.
- b. lleat up and cool down rates shall be controlled to prevent distortion.
- c. Parts shall be heated from 1900 F to 2l00 F for not less than 15 minutes.
t
$ GENuckwEnergy 5^5*
g o SH N **
- d. Parts shall be water quench-cooled or gaseous nitrogen quenched from 1900 F to 800 F quickly enough to assure passing the tests required by subparagraph "f" below.
- c. All surfaces shall appear reasonably bright and clean after heat treatment.
- f. Solution heat treated parts shall be tested by demonstrating with a mockup that the temperature is obtainable at a location in the center thickness, farthest from all heated surfaces or perform at least one (1) sensitization test in accordance with E50YP13 or E50YP20.
- g. Perform IGA testing per E50YP11 for each heat of material.
3.6 Control of Grinding. Where possible, grinding shall be performed prior to any solution heat treatment. Grinding should be restricted to instances required by fit-up or nondestructive testing needs. Where practical, machining should be used in place of grinding. Specific exception: the XM 19 tie rods shall be centerless ground after solution heat treatment.
3.7 Espair. Minor surface grinding or machining may be performed to remove surface defects or to change contour provided the following conditions are met:
- a. The thickness of the section is not reduced to less than minimum required thickness.
- b. The depression or ground area is blended uniformly into the surrounding surface with not less than a 4 to 1 taper.
- c. If aggressive grinding was utilized, the final surface shall be polished using successively finer abrasives to 220 grit.
- d. After final grinding or machining, the surfaces are examined by liquid penetrant to insure that no unacceptable defects remain.
3.8 Electrolyzirig. Electrolyzing, when specified on a fabrication drawing, shall be in accordance with P16IWP3A.
3.9 Final Surfaces. All nicks and scratches in excess of the applicable surface finish criteria are to be removed by blending into the surrounding surface. Smface finishes shall be uniform in ,
appearance, l 3.10 Shnp. Applied Practices. The buyer's specification Y1010A3, Shop Applied Practices, shall be considered an integral part of the fabrication drawings, and be so implemented during fabrication and inspection.
3.11 Identification and Marking. Finished parts shall be marked as specified on the detail i product drawings. Low stress interrupted dot stamping is an acceptable method of markmg. I 1
gg '
719 SH NO. 9 Parts which are too small for practical marking may be identified by individual bagging and tagging.
4.0 deleted
- 5. QUALFIYASSURANCE 5.1 Submittals. Submittal requirements shall apply to the Fabricator and the Fabricator's subcontractors. The Fabricator shall be responsible for all submittals including those of the Fabricator's subcontractors. If any changes are made to the submittals, the Fabricator shall send revisions to the Buyer.
5.1.1 Reauired Submittals. The following items shall be submitted for approval prior to use:
- a. Bending and forming procedures
- b. Heat treating procedures
- c. deleted
- d. Nondestructive examination procedures
- c. Packaging procedure 5.2 Material Control. Material shall be controlled within the fabricator's shops under a quality assurance program which has been determined by survey / audit to meet material traceability and safety grade manufacturing practices as required by the Code of Federal Regulations 10 CFR 50, Appendix B, and 10 CFR, Part 21.
5.3 Inspection and Tests. All materials, part final surfaces, and welds (if any) shall be inspected for quality and cleanliness prior to the last operation which results in inaccessibility.
Follmving such inspection, measures shall be taken to prevent the enty of soils into inaccessible areas during subsequent fabrication steps.
5.3.1 Liquid Penetrant Examination. All final part surfaces, except small inaccessible openings, shall be examined by the liquid penetrant method in accordance with E50YP22A, except that no cracking is permissible and linear indications shall not exceed 0.06 inch in length. Liquid penetrant materials shall be in accordance with E50YP22 or buyer approved equivalent. Provision shall be made to avoid the entrapment ofliquid penetrant materials in anyinaccessible areas.
5.3.2 deleted l
/ . . . ' '* -
t 9 GEAbaiserEnergy 25A5719 REv. O SH NO.10 FINAL 5.3.3 Ultrasonic Examination. Material (forgings, bars and plates) shall be ultrasonically ,
examination in accordance with ASME Code Subsection NG, paragraph NG-2540, or a buyer approved equivalent procedure, l
5.3.4 NDE Personnel Certification. Certification for personnel performing NDE examinations shall be reviewed as part of the approval of the vendor / fabricator during the vendor qualification audit.
- 6. PREPARATION FOR SHIPMENT 6.1 General Reauirement. Components fabricated to this specification shall be prepared and packaged for shipment in such a manner that the components will not be damaged or lost by l handling or environment during transit.
6.2 Procedure. The Fabricator shall package product in accordance with approved j procedures.
6.3 Identification. The component (s), when prepared for shipment, shall be identified by the purchase order number and other pertinent information in such a manner that component (s) identity shall be maintained during shipment. When more than one component is included in a crate or package, the marking on the packaging shall indicate both the identity and quantity of parts.
(
l
- ___ _ _ _