ML20073J731
| ML20073J731 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 09/24/1994 |
| From: | Ahmann R, Lenz M, Trovato J GENERAL ELECTRIC CO. |
| To: | |
| Shared Package | |
| ML19304C598 | List: |
| References | |
| 25A5601, NUDOCS 9410070099 | |
| Download: ML20073J731 (11) | |
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1 GEN &B-Q 25A5601 SH NO.1 EIS IDENT: FAB SHROUD . STABILIZER ,
REVISION STATUS SIIEET i
DOCUMENT TITLE FABRICATION OF SHROUD STABILIZER i
LEGEND OR DESCRIPTION OF GROUPS TYPE FABRICATION SPECIFICATION !
FMF PEACH BOTTOM 2,3 I
MPL NO: PRODUCT
SUMMARY
SECTION 7 B13-D070 l THIS ITEM IS OR CONTAINS A SAFETY-RELATED ITEM YES X NO EQUIP CLASS CODE E j REVISION l C i A RM-01426 RJA 1 J TROVATO SEP 2 41994 RJA CONTROL ISSUE RM-01502 CHK BY; J TROVATO t
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i PRINTS TO MADE BY APPROVALS GENERAL ELECTRIC COMPANY 175 CURTNER AVENUE J.L. TROVATO 8-30-94 M.O.LENZ 9-9-94 SAN JOSE CALIFORNI A 95125 -
CHKD BY: ISSUED 9/09/94 J.L. TROVATO 9-9-94 R. J. AHMANN CONT ON SHEET 2 1
9410070099 940926 PDR ADOCK 05000277 P PDR
L ggg 25A5601 SH NO. 2 l
f 1. SCOPE l l 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, 1 316, 316L, stainless steel type XM-19, and Ni-Cr-Fe alloy X-750 materials. l l
1.2 Definitions Buyer - General Electric Nuclear Energy (GENE)
Fabricator - The supplier authorized by GENE to perform fabrication services for the hardware items comprising the shroud stabilizers.
- 2. APPLICABLE DOCUMENTS 2.1 GE Nuclear Enercy Documents. The following documents form a part of this specification to !
l the extent specified herein. In case of any conflict between this document and any of the following, the i requirements of this document shall govern. j l
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- 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 e
- d. E50YP11 Examination for Intergranular Surface Attack
- e. E50YP22 Liquid Penetrant Examination
- f. Y1010A3 Shop Applied Practices
- g. P10JYP2 Age Hardening of Ni-Cr-Fe Alloy X-750 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 supponing documents) form a part of this specification to the extent specified herein.
2.2.1 American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code
- a. Section III, Subsection NG, Core Suppon Structure,1989 Edition
- b. Section IX, Welding and Brazing Qualification
- l h GENucisarEnergy 25A5601 v,
SH NO. 3 2.2.2 American Weldine Society (AWS) Standards
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- a. AWS-A2.4, Symbols for Welding and Nondestructive Testing i
- b. AWS-A3.0, Terms and Definitions i t
2.2.3 American Society for Testine and Materials (ASTM) !
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- a. ASTM A-370, Specification for Mechanical Testing of Steel Products l<
and Valves and Parts for High-Temperature Service l l
- c. ASTM A-240, Specification for Heat-Resisting Chromium and Chromium-Nickel Stainless Steel !
i Plate, Sheet, and Strip for Pressure Vessels
- d. ASTM A-479, Specification for Stainless and Heat-Resisting Steel Wire, Bars, and Shapes for l Use in Boilers and Other Pressure Vessels t
- e. ASTM B-637, Specification for Precipitation Hardening Nickel Alloy Bars, Forgings, and Forging Stock for High-Temperature Service ,
- f. ASTM A-262, Detecting Susceptibility to Intergranular Attack in Stainless Steel !
l 2.2.4 US Federal Recister Code of Federal Reculations (CFR) .
10 CFR 50 - Title 10, Energy; Chapter 1, Nuclear Regulatory Commission; Part 50, Licensing ;
a.
of Production and Utilization Facilities, Appendix B, Quality Assurance Criteria for Nuclear Power Plants.
- b. 10 CFR 21, Reporting of Defects and Noncompliance
- 3. REQUIREMENTS i 3.1 General. This specification is for use in conjunction with detail product drawings which define the requirements for each pan of the shroud stabilizers. It is intended that all parts will be fabricated without welding. Welding requirements are only included herein as a repair contingency.
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 repon (CMTR). Physical and chemical overcheck tests are required for each heat number of material in accordance with ASTM A-370.
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gggg 25A5601 SH NO. 4 3.2.1 X-750 Material. Nickel-chrome-iron (Ni-Cr-Fe) alloy X-750 shall be in accordance with ASTM B-637, UNS N07750, Type 3 and the additional 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 Hot Formine. Ni-Cr-Fe alloy X-750 shall be hot formed in accordance with a buyer approved fabricator's procedure.
l 3.2.1.3 X-750 Heat Treatment. Ni-Cr-Fe alloy X-750 shall be annealed at 1975 25 F (me:al temperature) and air cooled after hot forming operations. The center of the cross-section shall be held at th!s temperature for 60 to 70 minutes. Equalizing heat treatment at 1500 F to 1800 F is prohibited.
Product forms with both cross section dimensions less than six inches by six inches may be water quenched after annealing as a vendor option, and with buyer approval. Materials 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 Testine. Intergranular attack (IGA) testing per E50YP11 shall be performed after annealing for each heat and heat treat lot. IGA examination is not required if a minimum of 0.030 inch of material is removed from all surfaces of the product form after final heat treatment. IGA examination is not required after age hardening.
3.2.1.5 X-750 Ace Hardenine. Ni-Cr-Fe alloy X-750 shall be age hardened at 1300 i 15 F for 20 hour2.314815e-4 days <br />0.00556 hours <br />3.306878e-5 weeks <br />7.61e-6 months <br /> minimum and air cooled in accordance with P10JYP2D, and a buyer approved procedure. Age hardening may be performed before or after machining as long as the final part meets all dimensional requirements.
3.2.2 Austenitic 300 Stainless Steel. Austenitic 300 series stainless steel shall be in accordance with ASTM A-479, A-182 or A-240 type 304,3CML,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.
l 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 to a temperature below 400 F. The solution anneal shall be performed after completion of final reduction, sizing, and straightening operations. Successful completion of the sensitization testing of paragraph 3.2.2.2 shall be accepted as evidence of the correct solution heat treatment, if time and temperature charts are not available.
3.2.2.2 Austenitic 300 SST Sensitization. Austenitic 300 series stainless steel shall have sensitization testing performed for each heat and heat treat lot in accordance with the requirements of E50YP20. or by ASTM A-262 Practice E if no welding will be performed on the part.
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Y GENudearEnergy 25^5601 REV. I Sn no. 5 3.2.2.3 Austenitic 300 SST IGA Testine. Intergranular attack (IGA) examination shall be perfonned for each heat and heat treat lot in accordance with the requirements of E50YP11. IGA examination is not required if a minimum of 0.030 inch of material is removed from all surfaces of the product form after final heat treatment.
3.2.2.4 Austenitic 300 SST Hardness. The maximum hardness of austenitic 300 series stainless steel material and completed parts shall be R 3 90 for types 304 or 304L, and Ra 92 for types 316 or 316L. ;
3.2.3 XM-19 Stainless Steel. Type XM-19 stainless steel shall be in accordance with ASTM A-479, A-182, or A-240. The maximum carbon content is limited to 0.040 per cent. The applicable ASTM l specification shall be as specified on the specific piece part drawing. The additional requirements l below also apply. ;
i 3.2.3.1 XM-19 SST Heat Treatment. ' XM-19 stainless steel shall be solution annealed at 2000 F i l 50 F (metal temperature) for 15 to 20 minutes for each inch of thickness, but for 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 tie rods may be air cooled so that the metal L temperature is below 800 F within 20 minutes of removal from the furnace. The solution anneal shall be performed after completion of final reduction, sizing, and straighting operations. Sucessful 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.
3.2.3.2 XM-19 SST Sensitiatie. Each heat and heat treat lot of XM-19 material shall be. tested for i
sensitization in accordance with the requirements of ASTM A-262 Practice E.
3.2.3.3 XM-19 SST IGA Testine. Intergranular attack (IGA) examination shall be performed for each heat and heat treat lot in accordance with the requirements of E50YP11. . IGA examination is not ,
required if a minimum of 0.030 inch of material is removed from all surfaces of the product form after final heat treatment.
3.2.3.4 )(M-19 SST Hardness. The maximum hardness of XM-19 stainless steel material and completed parts shall be Re 30.
3.3 ' Cuttine. Formine. and Cleanine 3.3.1 Mechanical Cuttine Methods. Methods such as machining, grinding (see also paragraph 3.6) and sawing are acceptable. Methods 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. .
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$ GENuckwEnergy 25^5s01 REV.1 sH no.s 3.3.2 Thermal Cuttine Methods. Plasma are 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 tha'. are inaccessible to cleaning operations.
3.3.3 Bendine and Formine Control for Stainless Steel. There shall be no cold fonning, bending, or cold reduction for austenitic stainless steel, unless otherwise specified in the paragraphs below, or unless 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 refonning shall be performed in accordance with an approved procedure.
3.3.6 Control of Deformation. For parts that are straightened, reformed, or otherwise subjected to deformation as part of the normal fabrica* ion process, the following controls shall be met: (1)
Hardness of any wrought stainless steel in the final fabricated condition shall not exceed the hardness requirements of paragraphs 3.2.2.4 and 3.2.3.4 as determined by an approved procedure. The buyer approved procedure shall include the specification of locations for hardness testing. The hardness shall be measured with a test device specifically designed to perform Rockwell B measurements for 300 series stainless steel, and with a test device specifically designed to perform Rockwell C measurements for XM-19 stainless steel. (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 l include such things as machining lubricants, liquid penetrants, solvents, tapes, ultrasonic testing i couplant, abrasive grit, packing materials, marking materials, weld spatter compounds, and other materials which will be in contact with the part being fabricated. All miscellaneous process materials shall be controlled to prevent contamination of stainless steel and Ni-Cr-Fe materials. The known contaminates of concern are chlorides, fluorides, sulfur, lead, mercury and all metals with low melting i points. In addition, when welding or heat treating is involved, all carbonaceous material and phosphates must be considered harmful on stainless steel which can pick up these contaminates. Parts may be cleaned in accordance with P50YP211 as one method to control contamination.
3.4 Heatine Control for Stainless Steel. Austenitic stainless steel shall not be heated above 8000F except by welding or thermal cutting unless the process will be followed by solution heat treatment.
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$ GENudearEnergy 25j_6 g7 ,1 SH N 7 l
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 shall meet the following requirements:
- a. Parts and any fixtures used in the heat treatment shall be visibly clean prior to heat treatment.
- b. Heat up and cool down rates shall be controlled to prevent distortion.
- c. Parts shall be heated from 1900 F to 2100 F for not less than 15 minutes.
- d. Parts shall be water quench-cooled from 1900 F to 800 F quickly enough to assure passing the tests required by subparagraph "f" below.
- e. All surfaces shall appear reasonably bright and clean after heat treatment and shall meet buyer approved limits for oxide discoloration.
- 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 testing in accordance with E50YP11 and E50YP20.
3.6 Control of Grindine. Where possible, grinding shall be performed prior to any solution heat treatment. Grinding chould be restricted to instances required by fit-up or nondestructive testing needs.
Where practical, machining should be used in place of grinding (see also paragraph 4.6.2).
3.7 Repair Not Reauirine Weldine. Minor surface grinding or machining, without subsequent weld repair, 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. After final grinding or machining, examine the surfaces by liquid penetrant to insure that no unacceptable defects remain.
3.8 Electropolishine. When electropolishing is specified by the detail part drawing, a buyer approved procedure shall be used. Electropolishing shall remove 0.0002 to 0.0006 inch of the surface after all mechanical cutting is completed. The process shall use mixed phosphoric / sulfuric acid.
3.9 Final Surfaces. All nicks and scratches are to be removed. Surface finishes shall be uniform in appearance.
$ GENudewEnergy 25^5601 REV.1 SHNo8 3.10 Shon Applied Practices. The buyer's specification Y1010A3, " Shop Applied Practices", shall be considered an intergral 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 product drawings. Low stress interrupted dot stamping is an acceptable method of marking. Parts which are too small for practical marking may be identified by individual bagging and tagging.
4.0 WELDING 4.1 General. Welding requirements for 300 series stainless steel are included in this section as a repair contingency. Buyer approval shall be obtained prior to making repairs involving welding.
4.2 Weldine Filler Materials 4.2.1 Certification. A certified chemical analysis shall be obtained for each heat or lot of welding filler metal to be used.
4.2.2 Weld Filler Material. Welding filler materials shall conform to the requirements of the applicable welding process specification (see paragraph 4.2.4).
4.2.3 Filler Material Control and Storace Welding materials shall be controlled in such a manner that it can be proven which heats of material were used for component fabrication. All welding filler l materials shall be stored, issued, and handled in a manner that assures that filler materials are dry, clean, identified until consumed, and that the proper filler metal was used. A written procedure shall include procurement, baking, storage, issue, use, and return to storage of unused welding filler materials.
4.2.4 Allowed Filler / Base Metal Combinations The allowable welding filler metal types for the given base materials shall be in accordance with the welding process specifications listed below:
1 Base Material Process Specification !
- a. 300 Series Austenitic Stainless Steels P50YP102 l
4.3 Backine Bars and Straps. All backing materials such as bars and straps shall have the same requirements as the base materials or, where complete removal is assured, backing materials shall meet the chemistry requirements (as a minimum) of the base material.
4.4 Temocrary Attachments. Temporary welded attachments shall meet the chemistry requirement.y of the base material, or shall be carbon or low alloy steel buttered with a minimum of two layers of l weld deposit utilizing filler metal in accordance with paragraph 4.2.2 unless otherwise specified.
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gg 25A5601 SH NO. 9 4.5 Shieldine Gases. Shielding gases shall be welding grade argon or mixtures of argon with helium or hydrogen.
4.6 Oualification for Weldinc. All welding procedures and welders shall be qualified in accordance with ASME Section IX (the latest edition and addenda).
4.6.1 Fillet and Partial Penetration Welds. Fusion requirements for partial penetration and fillet welds with less than 90 included angle shall be demonstrated by approved test welds.
4.6.2 Control of Grinding. For procedure or welder qualification, the test assembly weld joint shall be welded in strict accordance with the approved welding procedure with no added precautions which will not be used in production. Excessive grinding to overcome poor welding technique shall be 3 unacceptable. Grinding shall be used only for dressing of starts, stops, occasional reshaping of beads for accessibility, smoothing of surfaces prior to required penetrant examinations, and smoothing of final surfaces. Each case of grinding for accessibility shall be specifically approved by the responsible welding engineer and so noted in the records. Adequate supervision shall be provided to assure adherence to these requirements.
4.7 - Welding 4.7.1 Weld Symbols and Definitions. Interpretation of weld symbols shall be in accordance with AWS A2.4 and definitions in accordance with AWS A3.0. '
4.7.2 Weldine Process Specifications. All welding shall be performed to the requirements of this specification and P50YP102.
4.7.3 Welder Identification. A welder identificati)n system shall be employed such that records are l available showing the person (s) welding each joint.
4.7.4 Weldine Procedures. All welding including temporary attachments and their removal shall be )
performed in accordance with approved detailed written welding procedures. Welding procedures shall contain all essential and non-essential variables listed in ASME Section IX and shall contain the additional requirements of this specification, as applicable.
4.7.5 Alienment. Unless otherwise specified, alignment of sections shall be such that the maximum offset of the finished joint will not be greater than 1/8-inch or 1/4 T, whichever is less, where T is the thickness of the thinner base material. Alignment of sections at joints for single welded full-penetration groove welds shall be such that the maximum offset at any point shall not exceed 0.045 inch at the root side. All final dimensional requirements for the component or assembly shall be maintained.
4.7.6 Arc Strikes. Arc strikes on stainless steel surfaces shall be removed, verified by visual and penetrant examination, and weld repaired, if necessary. The final surface of weld repairs shall be inspected by liquid penetrant.
gggg 25A5601 SH NO.10 1
j 5. QUALITY ASSURANCE e t 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 Required Submittals. The following items shall be submitted to the Buyer for approval prior to t
use: <
- a. Bending and forming procedures
- b. Heat treating procedures !
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- c. Welding procedures (including repair procedures) and welding procedure performance qualifications
- d. Nondestructive examination procedures and personnel certifications ;
- e. Packaging procedure ;
i 5.2 Material Control. Material shall be controlled within the fabricator's shops under a quality i assurance program which has been determined by survey / audit to meet material traceability and safety ;
I grade manufacturing practices as required by the Code of Federal Regulations 10 CFR 50, Appendix B, and 10 CFR, Pan 21. ; ;
i 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. Following such i inspection, measures shall be taken to prevent the entry of soils into inaccessible areas during ,
subsequent fabrication steps. i 5.3.1 Liauid Penetrant Examination. All final part surfaces, except small inaccessible openings, shall l be examined by the liquid penetrant method in accordance with E50YP22A, except that no cracking is j permissible and linear indications shall not exceed 0.063 inch in length. Liquid penetrant materials j shall be in accordance with E50YP22 or buyer approved equivalent. Provision shall be made to avoid i the entrapment of liquid penetrant materials in any inaccessible areas.
5.3.2 Radiocrachic Examination. Radiographic examination shall be performed on.all structural welds, if any are allowed as a repair, in accordance with the ASME Code, Article NG-5000 and 1 acceptance criteria in accordance with Subarticle NG-5320. Acceptance standards and penetrameters i shall be based on the final section thickness. ,
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ngl.1 5.3.3 Ultrasonic Examination. Material shall be ultrasonically examination in accordance with ASME Code Subsection NG, paragraph NG-2540, or a buyer approved equivalent procedure.
- 6. PREPARATION FOR SHIPMENT 6.1 General Reouirement. 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 handling or environment during transit.
I 6.2 Procedure. The Fabricator shall package the product in accordance with Buyer approved 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 the component (s) identity shall be maintained during shipment. When more than one component is included in a crate o.
- package, the marking on the packaging shall indicate the identity and quantity of all parts.
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'l . EIS 1 DENT: CLN AND CLEANLINESS CONT i REVISION ST ATUS SH EET W NTN. NN R EV. 1 f GENER AL $ ELECTRIC 236X530 APPUCATION HUCLEAR ENERGY DIVl$10 N fl (MPL -(s) lI Typg INSTALI.ATION SPECIFICATION ORAWING 007qgg l h SPECIFICAT10N CLEANING AND CLEANLINESS CONTROL FOR FIELD MODIFICATIONS OF VESSEL DOMT DTLE i,UMFONENIS LEGEND-
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, GENER ALO EtEcraic BOLLING WATER REACTOR SYSTEMS DEP ARTMENT oocu-awr..21A2040 ....~o 1
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CLEANING AND CLEANLINESS CCNTROL FOR F1EI.D MODIFICATIONS OF VESSEL COMPONENTS
- 1. SCOPE 1.1 This specification defines the requirements for cleaning and cleanliness control for field modifications of vessel components.
- 2. APPLICABLE DOCLMENTS, CODES, AND STANDARDS 2.1 The following documents, codes, and stardards form a part of this specification to the extent specified herein.
2.2 General Electric Company Documents 2.2.1 Reference Documents. Reference documents are those documents that fulfill functions not directly aff ecting the Construction of a component or appurtenance.
Reference documents to this document follow:
2.2.2.1 Laference specifications .
- a. Thread Lubricant - D50YP2
- b. Thread Lubricant - D50YPSA or B
- 3. DESCRIPTION l
3.1 The cleanliness objective for field modification of vessel components,is to perform the work in such a manner so as to be clean at the end of assembly with no need for final cleaning.
4 REQUIREMENTS l
4.1 General l
4.1.1 Approvals. Where approvals are required by this document, approval shall be obtained from the responsible General Electric Design Engineering unit.
4.1.2 Quality for Cleaning Water The follwing requirements shall apply to wa:er used for cleaning.
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21A2040 s . ~ o. 3 GENER AL h ELECTRIC l
- NUCLEAR ENERGY DIVISION I R E V.
d I
i l 4.1.2 (Continued)
J Demineralized Water i
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' Maximum or Range pH @ 25*C (77'F) 5.5 to 8.0 Chloride ppm
- 1.0 Fluoride ppm 1.0 Sulfide ppm 1.0 Conductivity 9 25'C, unho/cm 3.0
< Silica ppm 0.05 Turbidity 1 Jacke Turbidity Unit 4
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4.1.3 Inhibited Water. Inhibited water shall be water The to which a minimum of 500 ppm final solution shall contain of phosphate has been added as reagent grade TSP,.
a minimum of 500 ppm phosphate and. shall cantain no more than 100 ppm of chlorides.
4.1.4 Treatment of Sensitized Stainlast Steel.
All water contacting nitrided materials shall be inhibited water in accordance with Paragraph 4.1.3.
4 4.2 Frequency of Cleaning ,
1 l 4.2.1 Cleanliness of stainless steel and Ni-Cr-Fe materials shall be controlled so
' that surf aces are visibly free of the miscellaneous materials and other centaminants j listed in Paragraph 4.4 prior to any of the following operations:
a) Assembly such that surf aces are no longer accessible for cleaning.
b) Welding. Surf acas for a minimum distance of 1 inch from the veld shall be j
clean except that anti-spatter compounds may be applied up to the veld edge when approved providing that test work is performed to demonstrate that material properties are not detrimentally affected.
c) Wetting of Surfaces. Stainless steel and Ni-Cr-Fe surf aces shall be visibly clean prior to being wet except for cleaning solutions, a
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BOILING W ATER REACTOR SYSTEMS DEPARTMENT .<.1 coewe~r o21A2040
....... 4 j 4.3 Storage _
l 4.3.1 During storage stainless steel and Ni-Cr-Fe parts shall be protected from l
exposure to harmful raterials and shall be kept visibly clean and dry.
l 4.4 Contaminants and Miscellaneous Process Materials 4.4.1 Miscellaneous Materials. All materials which are applied or which contact stainless steel and Ni-Cr-Fe shall be from the f. '.owing list or shall alternately be j submitted for approval.
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- a. Water. All water shall be demineralized water.
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- b. Liquid penetrant materials. As approved in the procedure l
- c. Cleaning solvents shall be in accordance with Paragraph 4.5.3 and 4.5.4
- d. Marking materials. Graphite lead pencils, ballpoint pen, and Carters Ink Ccmpany "Earks-A-Lot" tipped markers.
- e. Layout Fluid. Dyken Company - Dykem Steel blue, DX-100, Sprayon Products, l
l Inc. - Sprayon number 603 -
I f. Pressure sensitive tape - Nashua Corporation, Dutch Brand, number 357 (silver only), Trantex E12; Kendall Corporation, Polyken, number 222; 3M Company, Numbers: 480, and-850.
- g. Lubricants. Thread Lubricant D50YP2 or D50YP5A or B. D50YP5A shall only be used where essentially all of it will be removed prior to final '
assembly.
4.4.2 Meal Assembly Debris which require periodic cleanup are grinding dust, veld spatter, weld flux, flux fumes, anti-spatter compound, dye penetrant materials.
4.5 Cleaning Methods 4.5.1 The cleaning processes which follow are acceptable and other methods shall no:
be used unless approved.
4.5.2 General 4.5.2.1 Cleaning Solutions. The temperature of cleaning or flushing solutions shall not exceed 200'F. Cleaning solutions shall not contain more than 100 ppm of chlorides.
4.5.2.2 Mechanical met hods. When mechanical methods are used, precautions shall be taken to assure that particulate matter will not drop into areas inaccessible for cleaning. The following methods may be used with the listed precautionary l requirements.
a) De-slagging Ha=mers. Ham:ners shall only be used within the welding grcove l and shall not be used on the final surface of the material. I l
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21A2040 sH, ho. $ ;
G E N E R A L 4lll1 E LE CT RIC !
j NUCLEAR ENERGY DIVISION REV,1 P
i f 4.5.2.2 (continued) b) Wire Brushing. For use on stainless steel and Ni-Cr-Fe, wire brushes shall be stainless steel not previously used on other materials. Either power or hand brushing is acceptable. power wire brushing shall not preceed an acceptance liquid penetrant examination unless approved. Approval shall be based on an acceptable demonstration that the type of brush zad motor unit to be used does not close defects, i
c) Grinding, Filing. Sweeping, Vacuuming and Air Blowing. Air shall be free of oil. All tools including grinding wheels and files shall be clean prior to use. Abusive grinding where high heat is generated is prohibited.
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4.5.3 Water Cleaning. High, and low-pressure water blasting, and water flushing may be used to clean parts and structures providing the following conditions are met:
a) Water shall be in accordance with Paragraph 4.1.
b) Sodium phosphate may be added to the water, if desired. No other additives shall be used unless approved. Where sodium phosphate has been used controls shall be effected to assure removal of the l phosphate prior to velding.
c) The component part of structure shall be dried as soon as practical af ter the wetting operation. Drying may be accomplished by allowing l the part to drain. Areas which will not drain dry shall be dried by wiping with clean cloths, or blowing with oil-free air either heated er ambient.
4.5.4 Solvent Deeressing. Cleaning of acessible surf aces may be accomplished using the following listed solvents. Solvents, other than those listed, shall not.be used. l a) Aca t ene . Technical grade, new or redistilled (Acatone reclaimed by other methods shall not be used). l b) Alcohol. Isopropyl or otherwise denatured, technical grade alcohol.
c) Toluol. Toluol or toluene technical grade. This solvent will remove some tape residues which are not soluble in acetone.
4.5.5 Acid and Chelate Cleaning. No acid or chelate cleaning shall be used unless approved for the specific application.
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GENER AL U ELECTRIC BotLING WATER REACTOR SYSTEMS DEPARTMENT oocu r o.21A2040 .. ,,1
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4.5.6 Alkaline Cleaning. Cleaning solutions which contain free caustic (either l
sodium hydroxide or potassium hydroxide) shall not be used. Tri- Sodium Phosphate Cleaning may be used. ;
a) Parts may be swab cleaned with hot or cold solutions of tri-sodium phosphate. Phosphata shall be removed from surf aces by rinsing with water af ter cleaning has been accomplished.
j 4.5.7 Det ergent cleaning. Detergent cleaning shall require specific approval.
4.6 Cleanliness Control During Reactor Assembly f
l 4.6.1 Inspection of Items for Installation. All incoming items shall be inspected
) on arrival for condition of the parts and/or its packaging. If the container or packaging is found to be in good condition, inspection of the contents may be done at a later time when they are unpacked for assembly.
4.6.1.1 All internals for the reactor vessel shall be inspected for cleanliness and J
'l cleaned, if necessary, prior to installation in the vessel.
] 4.6.2 Vessel Access. Personnel, tools, and equipment entering the vessel shall be l controlled by a log or register system.
4.6.3 Cleanliness During Assembly. Positive means shall be provided for preventing veld slag, spatter, electrode stubs, toc 4s, dirt, grinding dust, and other such items l
from entering cleaned areas or from entering areas inaccessible for cleaning.
4.6.3.1 Crevices within six inches of flux welding shall be covered to prevent deposition of fumes.
4.6.3.2 The work area inside the reactor vessel shall receive periodic cleaning so that the soils produced during the assembly operation are not allowed to accumulate.
Effert shall be made to localize the soils produced. Cleaning shall include, as a minimum, the removal of all debris and contaminants; a thorough vacuum cleaning cf all l surfaces in the immediate work area including all non-portable tools and construction l
equipment, and if required for renoval of oil, a wipe down with clean, lint-free c1cchs ,
l using an approved solvent. l l
4.6.3.3 As work is completed in specific areas, such areas shall be sealed af ter t
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final cleaning when f easible. The method of sealing shall be able to withstand the l
affects of welding and grinding above them and of personnel passage through them, l if required.
l 5. FINAL CLEANING AND ACCEPTANCE CRITERIA l
5.1 Final Cleaning. After assembly has been completed,the modified components sha21 be visibly free of all soils, miscellaneous materials and other foreign materials.
Slight surface marking due to water evaporation and/or a light coating of phosphate j is permissible, j
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. GEN ER AL O stictaic BotLING WATER REACTOR SYSTEMS DEPARTMENT oc ew s , n o. 21 A2 C40 ,, , ,, 1 n.... 7 FINAL 1
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l l 6. SGMITTALS
- j. 6.1 General l 6.1.1 Submittal requirements shall apply to the Installer and to the Installer's subcontractors . The Installer shall be responsib'.e for all submittals including those l
of the Ins taller 's subcoptractors . If any changes are rade either by the authority in Paragraph 4.1.1 or by th& Installer to the submittale, a new revision shall be sent by
[ the Installer.
6.2 Procedures and Documents i
6.2.1 The following ite=s shall be submitted for approval, f
- a. List of any miscellaneous aterials to be used which are not included in this specification.
- b. Methods of cleaning and keeping clean during assembly. Included would be any cleaning procedures, mechanical or otherwise,and cleaning prohibitions.
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