ML20064G655
| ML20064G655 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 12/07/1978 |
| From: | Gilleland J TENNESSEE VALLEY AUTHORITY |
| To: | Varga S Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7812120166 | |
| Download: ML20064G655 (33) | |
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TENNESSEE VALLEY AUTHORITY CH ATTANCoGA. TENN ESSEE 374c1 830 Power Building DEC 7 1973
'ri i
n-Director of Nuclear Reactor Regulations l
Attention:
Mr. S. A. Varga, Chief Light Water Reactors 3 ranch No. k Division of Project Management U.S. Nuclear Regulatory Commission Washington, DC 20555 Ceu Mr. Varga:
s In the Matter of the Application of
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Dockst Nos. 50-327, Tennessee Valley Authority
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$0:324 Enclosed is the requested package of material for your review of our change'7of_ cleaning procedures of austenitic pipe. Our need for a change df the c'ommitment in the dequoyah Nuclear Plant Final Safety Analysis (FSAR)fasdiscussedinatelephoneconversationwith j
Mr. Silve( ot y ur staff on December 1, 1978. Enclosed are the FSAR draft amendM~ent material page 5.2-38; the referenced Westingbouse specifica+. ions, Sh351 NL and 507760; and the referenced Department of Energy's specification, RDT ? 5-lT.
Very truly yours, s
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J. E. Gilleland Assistant Manager of Power Enclosures N
781212 6/(p p An E:u210:certurity E-: cur
We ' process specifications which establish these rules and which are In compliance with the more current American National Standards Institute N-45 Committee specifications are as follows:
Ptocess Soecification 82560hM Requirements for Pressure Sensitive Tapes for use on Austenitic Stainless Steels.
83336K Requirements for Ther=al Insulation Used on Austenitic Stainless Steel Piping and Equipment.
83860LA Requirements for Marking of Reactor Plant Components and Piping.
84350HA Site Receiving Inspection and Storage Require =ents for Systems, Material and Equipment.
84351NL Deternination of Surface Chloride and Fluoride on Austenitic Stainless Steel Matettals. TH % 4H cetyl % % g wc M & 4,v PacI ging a d%rkpahing ducNr Co38nInt$ [orYip y
an cyweakosy'.'g,'yu w.e t:. u. czjt, /40 3531kA o
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Storage.
292722 Cleaning and Packaging Requirements of Equipment for Use in the NSSS.
597756 Pressurized Water Reactor Auxiliary Tanks Cleaning Procedures.
597760 Cleanliness Requirements During Storage Construction, Erection
~ anil S' tart l Mb
.<*jxci(%.-up Activities of Nuclear"Pover Sys tems. 77M M6
~Mj'Qsd 5.2.5.2 Solution Heat Treatment Recuirements All of the austenitic stainless steels listed in Tables 5.2-27, 5.2-28 and 5.2-32 are procured from raw material producers in the final heat treated condition required by the respective ASME Code Section II material specification for the particular type or grade of alloy.
5.2.5.3 Material Inspection Prog am All of the vrought austenitic stainless steel alloy raw materials
- -hich require corrosion testing af ter the final mill heat treatment are tested in accordance with ASTM A 393 using material test specimens obtained from specimens selected for mechanical testing. The materials
.are obtained in the solution annealed condition.
5.2.5.4 Unstabilized Austenitic Stainless Steels 1
3e unstabili:ed austenitic stainless steels used in the reactoc coolant pressure boundary and components are listed in Tables 5.2-27 and 5.2-28.
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5.2-38
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DATE AUG 291970
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h.N Westinghouse Electric Corporation Power Systems see PsttsatinFe.~,sp au um P.S. 84351 NL b[lh7[3 4.
N" I June 15 3
M Rev. 3 4t
. c, DETERMINATION OF SURFACE CHLORIDE & FLUORIDE oi~i 50 ___.
l CONTAMINATION ON STAINLESS STEEL MATERIALS _U
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,..w This procedure covers the apparatus and expedient maacc tor determining the surface concentration of chloride and fluoride on stainless steel surf aces af ter final cleaning in accordance
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with PS 597760 requirements.
2.0 TIME OF E M INATION bie Site chemist shall perform the sampling and test af ter the surface has been cleaned and in the case of surfaces to be that insulated, just prior to installing insulation (insuring the surfaces are not re-centaminated before insulation is installed). The amount of samp1.tng'. for a given system or component must be suf ficient to insure that the surf aces have been adequately cleaned and meet the chloride and fluoride con-centration limits of acceptance listed 'in Section 3.0.
3.0 LIMITS OF ACCEPTANCE 3.1 Insulated Surfaces The limit for surface concentrations on austenitic stainless f thermal insulation is steel surfaces E#i # * *EPliU*Ci "2 2
0.0015 mg C1/dm and 0.0015 mg F/dm. This level is readily attainable on smooth surfaces.
However, rough surfaces such as; mill or foundry skin, welds, etc.,
may require repeated cleaning and retests.
Conflictions shall be referred to PWR Chemistry Department for disposition.
3.2 Non-Insalated Surfaces The limit for surf ace concentrations on non-in sulated austenitic s tainless steel surf aces is 0.015 mg C1/da" and 0.0015 mg F/dm2 The higher chloride limit on non-insulated surfaces is permitted duc to the decreas ed potential for chloride cracking on non-heated surf aces.
Since temperature l
has little ef fect on fluoride cracking, the fluoride limit
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is identical for both insulated and non-insulated surfaces.
REF:
Basis for above criteria was frca D.D. Whyte letters SA-C-622 and SA-C-665 dated May 26, 19 71, and August 5,19 71, respectively and WCAP-7333 " Chemical Analysis Procedures for Pressuriced Water Reactors".
84351 NL 1
j 4.0 CHLORIDE ANALYSIS 4.1 Accuracy _
This method is capable of determining the presence of 0.000125 mg C1/dm2 on the surface. The time to perform the test and analysis
~is approximately 35 minutes.
4.2 Apparatus I
4.2.1 Hot Plate 4.2.2 Stirrers 4.2.3 No. 41 Whatman Filter Papers 4.2.4 Cheese Cloths or 4" Medical Gauze Pads 4.2.5 800 ml Beakers 4.2.6 FEcrobure ts, 5 ml with 0.01 ml graduations 4.2.7 Polyethylene Bags 4.2.8 Chloride free polyethylene or rubber gloves 4.2.9 Large Watch Glasses 4.2.10 Buechner Funnels 4.2.11 500, 1,000 and 2,000 ml Volumetric Flasks 4.3 Reagents 4.3.1 Mercuric Nitrate Standard (0.00282 N) - Dissolve 2.4200 gra=s of
[Hg(NO H 0] in 50 ml of water acid!.fied concent$a)$ed h$tric acid. Dilute to 1 liter.
mercuric nitrate 0..
with 0.5 ml of Filter if necessary. Dilute 5 to.1 ' nd ' tandardize weekly against a
s a 0.5 ppm chloride solution. In addition this solution is prepared by diluting 5 ml of chloride standard solution (100 mg.
chloride per liter) to 1 liter.
4.3.2 Sodium Chloride Standard Solution -
Dry Nacl to constant weight @ 105'C.
Prepare stock solution by i
dissolving exactly 0.1649g of dry salt in demineralized water and dilute to 1 liters with halide free water. The resulting standard contains 100 mg of chloride per liter.
4.3.3 Mixed Indicator -
Dissolve 0.5g of crystalline diphenylcarba:ene and 0.05g of bromophenol blue pcwder in 75 21 of methyl or ethyl alcohol (95%)
and dilute to 100 ml with alcohol. Store in a broun bottle and discard after 6 months.
4.3.4 Nitric Acid -
Mix 3 ml of concentrated nitric acid with 997 ml of water.
4.3.5 Sodium Hydroxide Solution (10g per liter) -
Dissolve 10 grams of sodium hydroxide in water and dilute to 1 liter.
- 84351 NL
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4.4 Sampling Procedure i
4.4.1 Cut clean cheese cloth into 4" squares of 8 layers chick or use precut medical gauze pads. Using clean, plastic or rubber gloves flush each cloth square three times with about -,
300 ml of demineralized water per rinse to remove,any chloride contamination of the cloth.
Then with plastic or
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rubber gloves squeeze the cloths to remove excess water and place the sampling cloths in a chloride free (well rinsed with demineralized water) polyethylene bag and tie the bag to eliminate drying of the cloths. Cloths should be rewetted with domineralized water after storage for greater than 1 day.
For sampling, remove two 4" square cloths from the bag using plastic or rubber gloves and proceed to wipe an area of 2
20 dm (2 ft ) on the surface of the pipe to be sampled with one of these cloths.
h Place sampling cloth and blank
- cloth in individual chloride
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' free polye thylene bags.,
I The sampling cloth and blank cloth are removed from the polyethylene bag and placed in individual.800 mi beakers.
Cover the cloth in the 800 ml beakers with about 250 ml of
(
l demineralized water each.
Cover the beakers with large watch glasses and heat to near boiling (95* to 100*C) for 10 minutes.
Stir during the boiling operation. Cool the sample and blank and filter the solutions individually through No. 41 Whatman filter paper in a Buechner-type funnel (aspirator type suction can be used).
The Whatman filter paper shall be rinsed with 2000 ml of domineralized water prior to use. The filtering is not necessary if the solutten is initially clear.
Wash the cloths repeatedly with demineralized water until about 200 mils of wash solution have been used for each. Adjust the filtered
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volume to 500 m1 for both sample and blark. 84351 NL
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O 4.5 Procedure NOTE:
Dilute mercuric nitrate solution is added to an acidified sample in the presence of mixed diphenylcarbazone - bromophenol blue indicator.
The end point of the titration is the formation of the blue violet mercury diphenylcarbazone complex.
4.5.1 To 200 ml of sample and 200 ml of halide-free blank add 8 to 10 drops of mixed indicator and shake.
If a
blue-violet or red color develops add HNO dropwise 3
until the color changes to yellow.
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Add %1 ml of excess acid.
If yellow or orange color forms immediately on addition of mixed indicator add NaOH solution dropwise until color changes to yellow.
Add N1 Ei of'3 - dropwise until blue-violet color appears, then add H30 excesa acid.
4.5.2 Titrate the sample and blank with =ercuric nitrate 4
solution until a blue-violet color persists.
Use white background under flask to aid in color determination.
4.5.3 Record volume of mercuric nitrate used for each sasple and for the blank.
. 84351 NL
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4.6 CAlfULATION Calculate the chloride concentration as follows:
3 Chloride (ppm) = ( 1
- 2) x N x 35.5 x 10 S
where: V = volume of titer used for sample (ml) y V = v lu e f titer used for blank (ml) 2 N = normality of mercuric nitrate solution S = volume of sample analyzed (31)
Conversion to surface units of mg C1/dm = Chloride (mg/1) x VT 2
s where: VI - total volume of sample (1)
A = area of wiped surface (dm )
h 5.0 FLUORIDE ANALYSIS 5.1 A'ccUraev This method is capable of determining the presence of 0.000125 eg 2
F/dm cn the surface. The time required to perform the analysis is approximately 15 minutes.
5.2 Apparatus 5.2.1 Beckman Expandomatic pH meter or equivalent.
5.2.2 Orion Fluoride Electrode Model 94-09 or equivalent.
5.3-Reagents 5.3.1 Purchase a fluorids standard and dilute to the following cencentrations with reagent grade water:
I O.05 ppm 0.10 ppm 0.20 ppa
. 84351 NL g
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5.4 Procedure 5.4.1 Measure three (3) aliquots of each at the fluoride standards prior to and at the conclusion of the test solution analyses Record the on the required expanded scale of the pH meter.
millivolt reading from the pH meter.
5.4.4 Plot the standard data 'on semi-leg paper, recording the fluoride concentration on the log scale as ppm fluoride.
5.4.3 Determine the fluoride concentration of the test solutions by measuring three (3) aliguots from each test solution with the specific ion electrode.
Record the millivolt reading.
5.4.4 Determine the fluoride concentration of the test solutions from the standard curve.
5.4.5 To convert the fluoride concentration measured as ppm to
. surf ace contamination units procee,d, as follows:
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mg F/dm = ppm fluoride x 2.5 x 10 NOTE:
If the fluoride concentrat1on of the test
. solutions do not fit on the standard curve (e.g.
conc. > 0.2 ppm F), prepare 0.5 as in and 1.0 ppa standards and proceed 5.4.1 above. Do not atte=pt to extrapolate the standard curve.
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. 84351 NL is
o RDT F 5-1T G
Supersedes RDT F 5-lT, February 1972 r
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D m 3r 0 0
l 0 0
i Js u__uu_u 4
ee CLEANING AND CLEANLINESS "s
a REQUIREMENTS FOR NUCLEAR COMPONENTS O
, -=
.+w JANUARY 1978
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Any further distribution by :ny helder of this document av of the dato therein to third parties representing foreign interests, foreign gevernme,es, for eign i
l companies, and foreign subsidicties or foreign division s of U.S. : mpenses should be coordinated *ith the Director, Division of Nuclear Power Development, Department of Energy.
DEPARTMENT. OF ENERGY DIVISION OF NUCLEAR POWER DEVELOPMENT l0 e
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Send copy and distribution inquiries to:
ROT Standards Ollite Ook Ridge National Laboratory Building 1000, Roorn 138-A P. O. Box X y
Ook Ridge. Tennessee 37830 8
i Printed in the United States of America DOE Technical Information Center; Cak Ridge, Tennessee 4
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FOREWORD This standard supersedes the February 1972 issue of RDT F 5-lT and incorporates those changes to that issue of the standard that were e
approved and published as Amendments 1 through 4 and those changes that were approved for publication in this revision. These changes are identified by the following marginal notations:
Al Amendment 1, April 1972 A2 Amendment 2, March 1973 A3 Amendment 3, December 1973 A4 Amendment 4, September 1974 C
Changed approved 1-25-78 D
Deletion approved 1-25-78 N
Addition approved 1-25-78 E
Editorial Change Other editorial changes that were made during preparation of this revf31on are not identified.
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ROT STANDARD noT r 5-lr DATE January 1978
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DEPART:ENT OF ENERGY PAGE i
OF 11 DIVISICN OF NUCLEAR PCWER DEVELCPMENT CLEANING AND CLEMLINESS REQUIRDIENTS FOR NUCLEAR COMPONENTS TABLE OF CONTENTS Page 1.
SCOPE 1
2.
APPLICABLE DOCUMENTS 1
2.1 RDT Standards 1
2.2 Federal and Military Specification and Standards 1
2.3 American Society for Testing and Materials (ASTM) 2 2.4 American National Standards (ANSI) 2 2.5 American Association for Contamination Control (AACC) 2 3.
DEFINITIONS 2
3.1 Alcohol 2
3.2 Chemical Reagents 2
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3.3 Clean Room
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2 3.4 Clean Area 3
3.5 Component 3
3.6 Contamination 3
3.7 Controlled Work Area 3
3.8 Coolant Surface 3
3.9 Corrosion-Resistant Material 3
3.10 Crevice 3
3.11 Denatured Alcohol 3
3.12 Critical Surfaces 3
3.13 Filter Cloth 3
3.14 Final Cleaned Surface 3
3.15 Flushes 4
3.16' Inaccessible Arcas 4
3.17 Noncorrosion-Resistant Material 4
3.18 Rust 4
3.19 Technical Grade 4
3.20 TCTFE Solvent 4
3.21 Water Grades 4
4 REQUIRDiENTS A
4.1 General 4
4.2 Procedures 6
4.3 Acceptance Criteria fe; Cleanliness 7
4.4 Clean Rocm, Clean Area, and Controlled Work Area 9
RDT F 5-1T PAGE tt O
Page 4.5 Water Used for Engineering Tests 9
4.6 Precautions 10 4.7 Cleaning Process 13 4.8 Drying 16 5.
COHP0t;ENT PROOF FLUSHING 16 5.1 Applicability
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16 5.2 Water Purity 16 5.3 Velocity of Flushes 17 5.4 Duration of Flushes 17 5.5 Flushing Acceptance Criteria 17 6.
QUALITY ASSURANCE PROGRAM 18 7.
MAINTENAI;CE OF CLEANLINESS AND fBEPARATION FOR DELIVER't 18 8.
DATA CilECKLIST 19 e
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RDT STANDARD '
aDr F 3-1r
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DATE January 1978 DEPARTMENT CF ENERGY PAGE 1
OF 20 DIVISION CF NUCLEAR PCWER DEVELCF. MENT 0
CLEMilNG AND CLENILINESS REQUIREMENTS FOR NUCLEM COMPONENTS 1.
SCOPE This standard covers cleaning and cleanliness requirements during C
f abrication and assembly of vessels, heat exchangers, pumps, piping, valves, and other components for nuclear service. This standard does not cover requirements for the cleaning of mill products or in-place cleaning of installed systems.
2.
APPLICABLE DOCUMENTS The following documents are a part of this standard to the extent specified herein. The issue of a document in effect on the date of invitation to bid, including any amendments also in ef fect on that date, shall apply unless nthervise specified. Where the standard appears to conflict with the requirements of the reference document, such conflict shall be brought to the attention of the purchaser for resolution.
2.1 RDT Standards.
RDT F 2-2 Quality Assurance Program Requirements RDT F 7-2T Packaging, Packing, and Markinifoi Ccaponents for Shipment and Storage '
RDT F 7-3T Marking of Components and Parts RDT F 11-3T Analytical Chemistry Methods for Metallic core (N
Components 2.2 Federal and Military Soecifications and Standards.
0-A-51 Federal Specification for Acetone, Technical 0-A-760 Federal Specific'ation for Ethyl Alcohol TT-I-735 Federal Specification for Isopropyl Alcohol 0-M-232 Federal Specification for Methanol MIL-C-81302 Military Specification for Cleaning Compound, Solvent, Trichlorotrifluoroethane FED-STD-209 Clean Room and Work Station. Requirements, Controlled Environ =ent O
U RDT F 5-lT PAGE 2
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PHS-956 Public Health Service Drinking Water Standards 27-CFR-212 Denaturing of Alcohol and Rum (Code of Federal E
Regulations, Title 27, Chapter 212) 2.3 American Society for Testing and Materials (ASTM).
Test for Chloride Ion in Water and Waste Water j
ASTM D 512
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ASTM D 1125 Tests for Electrical Conductivity of Water t
ASTM D 1179 Tests for Fluoride Ion in Water ASTM D 1192 Tests for Equipment for Sampling Water and Steam ASTM D 1293 Test for pH of Water and Waste Water i
ASTM D 1889 Test for Turbidity of Water ASTM D 3370 Practices for Sampling Water lE 2.4 American National Standards (ANSI).
ANSI All.1 Practice for Industrial Light,n,g.
2.5 American Association for Con'tanination Control (AACC).
AACC CS-lT Standard for HEPA Filters 3.
DEFINITIONS For the purposes of this standard, the following definitions are applicable.
3.1 Alcohol.
Ethyl alcohol in accordance with Federal Specifica-tion 0-E-760 and which has been denatured in accordance with Formula 23A of 27-CFR-212; methanol in accordance with Federal Specification 0-M-232; lE or isopropanol in accordance with Federal Specification TT-I-735.
3.2 Chemical Reatents. All reagents referred in this shall be of technical grade or better unless otherwise specified.
3.3 Clean Room.
A room which is operated tested and monitored in accordance with the requirements of FED STD 209.
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RDT F 5-1T PAGE 3
0 3.4 Clean Area. A clean area is a clean work station meeting the requirements of FED-STD-209 or a temporary enclosure operated to meet the same requirements as a clean room.
3.5 Component. A part, combination or parts, subassembly, or com-plete assembly.
3.6 Con tamina tion. Material that is not an inherent part of the component in question, such as grit, metal particles, oil, grease, slag, o
scale, residual films, and soil.
3.7 Controlled Work Area. A work area to which access of person-nel, tools, and materials is limited and physically controlled.
Tem-porary enclosures may be used where adjacent activities produce contam-ination which is detrimental to the job.
3.8 _ Coolant Surface. Surfacesthat\\areexposedtoorincommuni-cation with a working fluid of the system; 3.9 Corrosion-Resistant Material. A material that inherently resists oxidation or chemical attack in air, water, or the operating environment, including austenitic stainless steels, precipitation-hardening stainless steels, nickel-base alloys, and cobalt-base alloys.
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3.10 Crevice. Any narrow opening in a surface,or any open junc-ture between mating surfaces in which, dirt or l'fquids can be trapped and not readily removed; including the annular space in threaded connec-tions, socket weld assemblies, tube-to-tube sheet joints, tube-to-tube support joints, grooves, and press-fit joints.
3.11 Denatured Alcohol. Ethyl alcohol that has been denatured in accordance with Formula 23A of 27-CFR-212.
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3.12 Critical Surfaces. Surfaces, such as small orifices, bear-ings, bellows, journals, seating surfaces, and tubing of thickness equal to or less than 1/8 in. (3.2 mm), which when corroded or otherwise roughened can impair the function or cause the component to'become inoperable.
3.13 Filter Cloth. Cloth through which flushing water is pcssed to determine the acceptability of a flush. A bleached cotton fabric of
" nainsook" (muslin) construction that weighs between 2.8 and 13.2 oz.
per square yard (when new) and has approximately 80 to 100 yarns /in. in both the warp and fill directions.
3.14 Final Cleaned Surface. The surface condition after all sur-f ace f;.11shing and cleaning operations have been performed prior to placing the surface in service.
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RDT F 5-1T PAGE 4
O 3.15 Flushes.
3.15.1 Once-Through. Where water is introduced, flushed through a component under pressure at a prescribed velocity, and discharged from and outlet through a filter cloth.
3.15.2 Recirculating. Where a single batch of water is recir-culated under pressure at a prescribed velocity in a closed path through a strainer in the flushing system.
3.15.3 Proof. A flush to demonstrate that a component is free of gross contaminants.
3.16 Inaccessible Areas. Areas or openings in a component that readily accessible for cleaning or inspection during or after
.are not fabricating, and where dirt, liquids or other contaminants may be trapped during fabrication.
3.17 Noncorrosion-Resistant Material. Materials, such as marten-sitic chromium stainless steels, carbon steels, and low-alloy steels that inherently do not resist oxidation or chemical attack in air or water.
3.18 Rust.
Corrosion products, consisting la.rgely of hydrous
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ferric oxide, formed on the surface of iron and'irce.-base alloys.
Such oxides may vary in color from red to bfack or may form a loosely adher-ent heavy covering to a tightly aherent light film.
Pitting or general surface roughening may or may not be present.
3.19 Technical Crade. A designation for chemicals produced in bulk by ordinary commercial processes and having a nominal composition and purity which is confirmed by inprocess quality assurance tests, but which is not certified by tests on each lot or batch of material shipped.
Composition is usually certified to meet a typical composi-tion range as shown on the label of the container, or to meet a certain nominal or generic composition.
3.20 TCTFE Solvent.
Trichlorotrifluoroethane meeting the require-ments of Military Specification MIL-C-81302.
.t 3.21 Water Grades.
I The requirements for the various water grades to be used in conjunction with this standard are summarized in Table 1.
4 REQUIREMENTS 4.1 Cencral.
Fabrication shall be conducted so as to facilitate cleaning and inspection f or cleanliness, 'and to minimize contamination O
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ROT F 5-lT PAGE 5
O Tabic 1.
Water C'rades*'
Grade Property A
B C
Chloride, ppm maximum 0.1 1.0 (c)
Fluoride, ppm maximum 0.1 0.1 (c)
Conductivity, umhos/cm maxi =um 2.5 20.0 (c) pH 6.0 to 8.0 6.0 to 8.0 (c)
Turbidity, Jackson Candle 1.0 1.0 5.0 Units, maximun
" Power plant condensate and distilled water may meet the re-quirements for Grade B water. Demi.neralized water may meet the requirements for Grade A water.'
Where water has been subjected to possible carbon dioxide absorbtion, such as when retained in storage tanks, the pH requiremene. may be lowered to 5.8 to compensate for carbon dioxide pickup.
Where a particular grade of water is specified in this standard (e.g., " rinse with Grade C water) it shall be
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anderstood that the use of a higher grade is acceptable.
bThe standard methods of test of'the ASTM standards listed in 2.3 shall be used for reference purposes. Samples for test shall be taken in accordance with ASTM D 3370, using equip-lE ment meeting the requirements of ASTM D 1192.
" Grade C water shall be potable water meeting the require-monts of the Public Health Service Drinking Water Standards.
during fabrication. Shop dust, debris, and contaminants such as cutting fluids, welding slag, and other processing compounds shall be removed at intervals compatible with the fabrication or assembly operation and the requirements specified in 4.4.1, 4.,4.2, or 4.4.3 for the environmental control specified. Surfaces that have been final cleaned shall be maintained in a clean condition up to and including their assembly into the components.
Items furnished in accordance with this standard shall be suitable for installation at the construction site without additional cleaning.
Items that do not meet the requirements of this standard and the accep-tance criteria specified by the pur. chaser shall be rejected.
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O ROT F 5-lT PAGE 6
C 4.2 Procedures.
Prior to use, detailed procedures for cleanliness control, in-process cleaning, and final cleaning of all coolant and critical surfaces shall be submitted for purchaser approval. Detailed procedures for other surfaces specified by the purchaser shall also be submitted to the purchaser for approval prior to use.
Procedures shall include, but are not limited to, the following:
1.
The general cleaning procedures to be employed.
2.
Descriptions and drawings designating inaccessible areas and critical surfaces involved.
3.
Specific cleaning methods to be employed for inaccessible areas and critical surfaces.
4.
Precautions to be taken before, during, and after assembly to maintain cleanliness of incoming materials, components, and the completed item through final preparation for delivery.
5.
Required purity levels of cleaning reagents, solvents, and lubricants.
6.
Flushing and rinsing procedures and the method for determining when adequate rinsing or flushing has been achieved to satisfy the acceptance criteria specified in 5.5, including conduc-lE
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tivity, chl,oride, pH, and turbidity measurements'of the final flush or rinse water.
I 7.
Quality control and inspection procedures to be employed to ensure that the purchaser's requirements have been met during i
and after cleaning operations and fabrication.
I 8.
- cceptance standards for contamination and rust on components c'.d equipment where such critieria are not contained in this standard.
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9.
Drying methods to be employed on cleaned equipment, r
l 10.
Inhibitors employed for minimizing corrosion, when applicable, and procedures for their removal.
11.
Base metal or metals covered by the proceddre.
12.
Compatibility tests which are necessary prior to the cleaning operation to avoid deleterious effects on components or assem-blics containing differing materials.
13.
Precautions to be taken during,the cleaning operation to avoid deleterious effects on ecmpenents or assemblies containing differing materials, e.g., swelling of elastomers.
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RDT F 5-1T PAGE 7
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- 14. A list and description identifying the types of equipment to be used, such as cleaning tanks, spray systems, air compressors, filters, drying ovens, tumblers, and abrasive-blasting facil-ities.
- 15. Identification of the use of a clean room, clean area, or con-trolled work area at applicable stages of fabrication and assembly.
4.3 Acceptance Criteria for Cleanliness. Unless otherwise speci-fled, components submitted for final inspection shall be clean to the 4
extent that no contamination of any surface is visible, without magnifi-cation, to a person with normal visual acuity, natural or corrected.
In addition, a wiping technique chall be used to determine the cleanness of coolant surf aces, critical surfaces, or other surfaces specified by the purchaser; the cleanness of the surfaces shall be evaluated by wiping with a clean lint-free unbleached cloth', either dry or moistened (but I
not saturated) with technical grade alechol or acetone. Discoloration of the wiping cloth or a change in the appearance of the wiped surface shall be cause for rejection, except where it can be shown that the dis-coloration is not due to harmful contaminants (i.e., metal exides other than rust, which may cause discoloration, are generally not considered harmful). Illumination in inspection areas shall provide a glare-free O.
light intensity of at least 100 ft-candles (110 lx) on the surface being-inspected. (sge _ ANSI A11.1). Components which,,,do'..ot meet these require-ments shall be rejected.
4.3.1 Rust.
a.
Rust on Critical Surfaces.
'4 hen specified by the purchaser, surf aces of corrosion-resistant materials, defined as critical by the purchaser, shall be checked for complete removal of free iron by a vet-cloth test. The area in question shall be wrapped with a clean cloth j
that has been moistened with Grade 3 water or, when specified by the purchaser, Grade A water. If no rust occurs within 6 h, the surface shall be considered satisf actory. If af ter the wet cloth test, there are rust spots that can be removed by wiping with a clean dry cloth and no corrosion pits are visible, the surface shall be considered accep-table when all rust has been removed. The occurence of rust on clean corrosion-resistant surf aces may indicate that something is wrong with the material (e.g., improper heat treatment ot material composition),
and the cause of the rust should be determined before proceeding with fabrication.
b.
Rust on Noncritical Surfaces. Thin films of rust are accep-table on noncritical corrosion-resistant material surf aces [those sur-faces not included in 4.3.l(a) }, prov.ided there is no visible evidence lAl O
RDT F 5-lT PAGE 8
O of corrosion pitting and the total area involved does not exceed 1% of the estimated total surface of components.
Thin films of rust are defined as superficially corroded areas of red, brown or black discoloration. The rust observed may be either localized or general; that is, the rust may be present in spots or streaks or as a continuous film. Where localized rusting is involved, the total included area (the rusted area plus the included unrusted area) shall be used to determine the percentage involved rather than the actual area observed. These films of rust are not necessarily adherent.
In many cases, it e.ay be possible to re=ove the rust by rubbing with a clean dry cloth, c.
Rust on Noncorrosion-Resistant Materials. Acceptance criteria for rust on carbon and low-alloy steels shall be specified by the pur-chaser. Slight rusting is occasionally observed in the neighborhood of backup rings, socket weld joints, canopy velds and similar parts, where welding slag entrapment causes rusting as a.~ result of exposure to water.
Unless otherwise specified, rust observed in such areas should not nor-mally be considered detrimental provided the rust occurring in such areas is uniform in appearance and shows no visible thickness. Such forms of rust usually do not extend more than 1/2 in. (12.7 mm) from the area where slag entrapment has occured.
d.
Pitting. The following criteria shall be used to determine if pitting has occurre'd, and the presence o,f one or Eore of these condi-i tions shall provide the basis for rejection or repair. These criteria l
are*
I i
1.
The presence of pit-like indications in which the voids are visible.
l 1
2.
The buildup of corrosion products in a circular manner outlin-ing the area of the pits (actual void of pit may not be visi-ble); this type of buildup is usually considerably thicker than the surrounding rust and is almost always associated with pitting.
3.
The presence of annular rings of discoloration surrounding the core of the pit (these rings do not usually shcw any visible thickness; however, they are generally of different colors).
c.
Temper Films.
Irridescent temper films resulting from heat treatment and tightly adherent black exide films that occur en the backside of welds need not be removed.
4.3.2 Acceptance Criteria for Halocens. The cleaning proce-N dures developed in conf ormance with 4.2 are intended to reduce halogens to an acceptable level. In the event that it is necessary to evaluate a
()
cleaning procedure or check a surface that is thought to be contaminated
[
ROT y 3 17 3
I PAGE 9
O with halogens, an acceptable swab test method for determining halogens N
is described in Section 13 of RDT F 11-3.
For most component surfaces a 2
2 level of 5 ug/in (8 mg/m ) for chloride or fluoride is acceptable. For 2
cold-worked core component surf aces, a level 0.5 ug/inz (0.8 mg/m ) is acceptable. Applicability of the swab test and the acceptance criteria shall be as specified in the Ordering Data.
4.4 Clean Room, Clean Area, and Controlled Work Area. As a min-C imum, a controlled work area shall be employed for the fabrication, assembly, or both of reactor coolant system components. A controlled work area is an area where some means has been provided to control environment and access.
4.4.1 Requirements. Starting with that stage of fabrication where crevices and inaccessible surfaces are created, work area control should be by means of enclosures or barriers (permanent or temporary),
environental controls, or both which will prevent deleterious contami-nation from being introduced to the item interior as a result of opera-tions (such as machining, grinding, or welding). Work area cleanliness controls shall be in accordance to the requirements of 4.3 for mainte-nance of components cleanliness in inaccessible areas.
Where access for subsequent cleaning and inspection of all surfaces is retained, work area isolation may be by signs, gates, ropes, or other O.
physical barriors, to control access.
Controlled work areas shall be cl'early defined, and shall be posted regarding restrictions on tools, materials, personnel areas, and person-nel practices which will assure compliance with this standard.
4.4.2 Purchaser Options. In the event that the criteria or definition for a controlled work area, as defined in this standard, do not provide the cleanliness protection required by the purchaser, the Ordering Data shall give the specific requirements imposed which may
(
include a clean room or clean area as defined in 3.3. and 3.4.
4.4.3 uork Area control Procedures. The procedures required for 4.2 shall included details of work area cleanliness controls to be employed.
4.5 Water Used for Engineering Tests. Unless otherwise specified by the purchaser, Grades A, B, or C water =ay be used for hydrostatic, performance, and other engineering tests conducted at water temperatures below 150*F (66'C). When Grade C water is used, it shall be drained i= mediately after completion of the test and ccmponent shall be flushed immediately with Grade A or 3 water before the internal surfaces dry.
All grades of water shall be filtere,d i==ediately before use in testing or flushing and shall be checked to verify that the turbidity require-ments of Table 1 have been met.
6
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ROT F 5-1T PAGE 10 0
4.5.1 Grade A or B water shall be used for engineering tests of austenitic stainless steel components at water temperatures of 150*F (66*C) or higher, and Grade B or better purity shall be maintained throughout the tests. After completion of the test, the component shall be thoroughly dried to ensure the complete removal of all water.
4.5.2 Grade C water may be used for engineering tests of compo-nents made of materials other than austenitic stainless steels at water temperatures of 150*F (66*C) and higher unless otherwise specified by the purchaser. On completion of the test, the component shall be drained and flushed with Grade A or B water.
4.6 Precautions.
4.6.1 Sensitized Stainless Steel. Austenitic stainless steel C
that has been exposed to elevated temperature in the range of 800 to 1600*F (427 to 871*C) for an extended period of time is said to be "furnance" sensitized. The corrosion resistance of material in this condition has been impaired.
It must not be exposed to weak or strong electrolytes, such as acids, bases, and salts. The material must also be protected from exposure to salt air, weld fumes, or prolonged expo-sure to humid atmospheres. Austenitic stainless steels that have been exposed to this same temperature range for a brief period during weld-ing are said to be " weld" sensitized, and the ef fect 'is confined to a
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narrow zone adiacent to the weld. Weld-sensi,t.i 'ed. materials must be protected from the more agressive pr.ocess solutions such as those used in pickling and descaling.
4.6.2 Welding and Brazing.
Precautions shall be taken to cen-trol spatter and to remove smoke and fumes produced by welding and braz-ing operations. Anti-spatter and rust-preventive compounds shall not be used unless approved by the purchaser. The base material shall be cleaned f or a distance of at least 2 in. (50 mm) on each side of the joint edge preparation in accordance with the procedures approved by the s
purchaser (4.2).
4.6.3 Exposure to Contaminated Atmospheres. Metals and compo-nents shall be protected from the general shop atmosphere, or other centaminated atmospheres such as salt air or blowing dust, insofar as possible during fabrication and temporary storage.
4.6.4 Heating. Precautions shall be taken to prevent contami-nation of surfaces during or prior to heat treating, welding, hot form-ing, and other high temperature operations.
4.6.5 Use of Lubricants. A lubricant may be employed during machining, fabrication, and assemb.ly operations provided the lubricant does not contaminate any crevice or inaccessible area that cannot be subsequently cleaned, and provided that the lubricant is removed after
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completion of all operation for which it is used.
RDT F 5-lT PAGE 11 O
Where machining, f abrication, or assembly must be performed on C
crevice-containing components which will contain high temperature liquid metal in service and normal precautions will not prevent the entry of lubricant into the cervices, no lubricant shall be used, except when specifically approved by the purchaser prior to use.
Such apprc"cd lub-ricant shall be removed from the component immediately af ter the comple-tion of each operation for which it is used.
4.6.6 Mercury Control. During the manufacturing processes, tests, and inspections, the component or system shall not have come in direct contact with mercury or any of its compounds nor with any mercury-containing devices employing a single boundary of containment.
It is not the intent of this standard to prevent the use of permanent fluores-cent lighting fixtures or fixtures employing mercury vapor lamps which
.contain the equivalent of or less mercury per lumen than a comparable fluorescent lamp so long as the fixture or lamp is fitted with a contin-uous panel or dif fuser to prevent pieces of the lamp from dropping on the component in the event of lamp breakage. Portable lighting fixtures employing fluorescent or mercury vapor lamps, such as drop lights, are prohibited unless specifically approved by the purchaser. Pressure or C
vacuum gauges used for testing shall not be calibrated with mercury-containing equipment such as manometers.
4.6.7 Handling of Components.
In gene'ral, cleaned surfaces may O.
be handled with cican hands; however, clean lini-free cotton, nylon, or dacron cloth or polyethelene film gloves shall be used when handling final-cleaned coolant surfaces, critical surfaces, and other surfaces specified by the purchaser.
llandling equipment surfaces that come in contact with coolant sur-A4 faces, critical surfaces, or other surfaces specified by the purchaser, shall be clean and shall consist of austenitic stainless steel or other corrosion-resistant alloy, nylon, polyethylene, or other material approved by the purchaser.
4.6.8 Exclusion of Foreign Materials.
Extreme care shall be taken during fabrication ta prevent contamination by foreign materials.
Temporary plugs or seals conforming to the requirements of RDT F 7-2 shall be installed to keep contaminants out of a clean component during subsequent fabrication and storage. Prec.autions shall be taken to pre-vent such temporary plugs and seals from being inadvertently lef t in the component when shipped. Special attention shall be given to the cloth-ing worn by personnel working on clean components in which there are openings; precautions shall be taken to elimincte the possibility of accidental loss of articles in the component such as buttons, badges, j ewelry, pens, pencils, coins, spectacles, dentures, hearing aids, res-pirator filters, tools, used welding-rods, and other articles. An O
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RDT F 5-1T PAGE 12 O
inventory control shall be instituted for all tools, wiping cloths, sup-plies, and equipment small enough to fit inside openings of the compo-nent; insofar as practicable, such articles shall be attached to the user o'r to a fixed object by a lanyard, and shall be formally accounted for at all times.
4.6.9 Lead, Sulfur, and Aluminum. Lead or lead compounds, sul-fur or sulfur compounds, or materials containing lead or sulfur as a basic chemical constituent shall not be used in direct contact with the final cleaned surface of nickel-base alloys.
Aluminum shall not be used either as sof t pads or ha=mers to reduce marring during assembly and handling of nickel-base or stainless steel alloy components. Aluminum pipe caps and seals shall not be used on stainless steel or nickel-base alloy components. Zinc, cadmium, or other low melting point metals shall not be allowed to come in contact with final-cleaned stainless steel.
I 4.6.10 Pipe Joint Compounds and Sealers. Pipe joint compounds, teflon tape, or sealers other than colloidal graphite in isopropanol (neolube or equivalent), to prevent galling shall not be used in making up temporary or permanent joints of flushing systems or other attach-ments to the component unicss approved by the purchaser. Teflon-inserted jam nuts may be used to seal threaded connections only in temp-p orarily installed support systems and under the following conditions:
U l.
At ambient temperatures with pressures up to 3750 psig (25.8 MPa).
2.
At temperatures less than 300'F (149'C) with pressures up to 200 psig (1.4 MPa).
4.6.11 Corrosion Inhibitors. Corrosion inhibitors shall not be allowed to come in contact with materials intended for coolant surf aces; however, inhibitors may be employed for minimizing corrosion of metals and parts intended for noncritical applications during fabrication, shipment, storage, and installation.
4.6.12 Paint on Corrosion-Resistant Materials. Painting of corrosion-resistant materials is prohibited.
If paint is inadvertently applied to such materials, it shall be removed.by a procedure approved by the purchaser and which conforms to the requirements of 4.2.
1 Al 4.6.13 Marking. Temporary and permanent markings on parts, subassemblies, and components shall meet the requirements of RDT F 7-3.
4.6.14 Halogens in Processing Materials. Generally when aus-N tenitic stainless steels are being' fabricated, the use of processing C
ROT F 5-lT PAGE 13 0
materials formulated from halogens is to be avoided.
Processing mate-N erials with residual halogens such as liquid penetrants, lubricants, cutting oils, marking materials, tapes, leak detectors, wiping cloths, and paper towels should be certified for their total halogen contents.
Generally, such materials with halogens in the range of 200 ppm or less (chlorine + fluorine) are available. If a lower halogen content pro-cessing material is available and performs satisfactorily in other respects, it should be selected preferentially. Such processing mate-rials must be removed from all surfaces as soon as their function is completed at stages compatible with the processing activity and defi-nitely before exposure to elevated temperature or moist environments.
4.7 Cleaning Process.
4.7.1 Cleaning Agents. Cleaning agents and solvents used for inprocess cleaning or for final cleaning shall be technical grade or better. Unless specifically approved by the purchaser, halogenated cicaning agents and solvents, except TCTFE meeting the requirements of Military Specification MIL-C-81302, shall not be used for cleaning or degressing of austenitic stainless steel. Grade C or better water shall be used for mixing cleaning solutions. When rinsing or flushing is re-quired as a final step in final cleaning, Grade C water may be used for preliminary rinses or flushes, but Grade 3 or better water shall be used for the final rinse or flush.
4.7.'2 'Safetv.
Some of the, materials" required for use in this standard are hazardous. Every precaution shall be taken to protect personnel from materials that may present fire ha:ards, cause burns and skin irritations, or have toxic effect when breathed. Local safety organizations shall be consulted for specific instructions.
4.7.3 Mechanical Cleaning. Mechanical cleaning shall be per-formed in such a manner that particles will fall away from the equipment to preclude parti les from entering the component. k*here mechanical cleaning cannot be performed in a menner that particles fall away from s
the equipment, a vacuum hose or dirt catcher shall be employed. A vac-4 uum hose may also be employed near the work to remove fine airborne particles. Completed components shall be cleaned as required to remove any particles resulting from operations such as grinding, polishing.
filing, deburring, and brushing.
s a.
Mechanical cleaning tools such as grindiag, polishing, filing, deburring and brushing tools shall be clean and shall not have been used on aluminum, copper, lead, or materials containing lead or lead com-pounds, or other low melt 1ng point materials. Separate sets of tools shall be maintained and used as follows:
1.
One set of tools shall be used on carbon and lcw alloy steels only.
ROT F 5-lT PAGE 14 i
O 2.
One set of tools shall be used only on corrosion-resistant materials. These tools shall have not previously been used on carbon or low alloy steel materials to preclude contamination of corrosion-resistant materials with free iron. These sets of tools shall be clearly marked to identify their intended use in accordance with a system specified by the activity perform-ing the work and shall be segregated according to their intended use.
b.
Grinding and Polishing. Grinding and polishing shall be per-C formed with resin-or rubber-bonded vitrified aluminum oxide or silicon carbide grinding wheels or discs that will ensure a cleanly cut surface.
Only resin-bonded or vitrified grinding wheels or discs shall be used on stainless steel. Aluminum oxide shall not be used on core components.
c.
Brushing. Brushing shall be performed with clean austenitic sesinless steel brushes. Power-operated brushes shall not be used on seal membranes, seal welds, or thin sections such as bellows. Power-operated brushes shall not be used for cleaning components that will later be liquid penetrant examined unless the brushed areas are ground or machined prior to liquid penetrant examination.
d.
Filing and Deburring. Filing and deburring shall be performed with carbide-tipped or tool-steel tools. Rotary files used on austen-itic stainless steel shall be faced with tungsten carbide or titanium p,
V' carbide.
e.
Abrasive Blasing. Abrasive blasting shall be used only when C
approved by the purchaser. Surfaces that have been descaled by abra-sive blasting shall be subsequently acid cleaned, machined, or ground to remove any embedded scale or blasting grit.
f.
Tumbling Tumbling may be used only when approved by the pur-chaser. To preclude obscuring material defects, tumbling shall not be used on surfaces which are to be subsequently liquid penetrant examined, except when followed by machining or grinding. The tumbling equipment shall be thoroughly cleaned of materials used in previous operations.
After the tumbling operation, the surfaces shall be cleaned with a tam-pico or stainless steel brush, and then rinsed with Grade A or Grade B
[ A2 water.
4.7.4 Degressing Requirements. Unless otherwise approved by C
the purchaser, degressing of austenitic stainless steel surfaces shall be accomplished using technical grade or better acetone, alcohol, or TCTFE.
Parts shall be cleaned by immersion, by spraying, or by wiping with a clean lint-free unbleached cloth that has been saturated with one of these solvents. Such cleaning must be cempl,eted before that stage of fabrication or assembly which produces crevices or undrainable areas.
Should it become necessary to clean components containing crevices or undrainable areas, the procedure must not result in contamination of the
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1 ROT F 5-lT PAGE 15 0
crevices or undrainable areas. The procedure must be approved by the
- j. C purchaser prior to use in accordance with 4.2.
When TCTFE is used on parts or components containing inaccessible or undrainable areas, the parts or components shall be dryod by evacu-ation or heated to a temperature of 120 to 140'F (49 to 60*C) and flushed with dry, oil-free air or inert gas until no further indication of the solvent is found in the ef fluent air or gas, using a halogen leak detector. When acetone or alcohol is used for degreasing, drying shall be specified in accordance with 4.2 and approved by the purchaser prior to use.
4.7.5 Detergent cleaning Surfaces containing no crevices and which are fully accessible and drainable may be cicaned with trisodium phosphate detergent using a procedure approved by the purchaser before l Al use in accordance with 4.2.
8 4.7.6 Acid Cleaning. Acid cleaning shall not be used as a standard procedure and, when necessary, shall be done only with purchaser approval and in accordance with procedures approved by the purchaser prior to use in accordance with 4.2.
Components that have l Al crevices or undrainable spaces, hardened steels with nitrided surfaces, precipitation-hardening stainless steels, austenitic stainless steel that has been furnace-sensitized, and nonmetallic parts shall not be acid cleaned., Acid. cleaning may be used:
lC 1.
Following abrasive blasting providing the surfaces cannot be ground or polished after blasting.
2.
To remove heavy heat-treat or hot-rolling scale that cannot be removed by abrasive blasting, grinding, or brushing.
3.
To remove noncorrosion-resistant material embedded in the surface of corrosion-resistant material in the solution heat treated condition.
4 To passivate core components which have sensitization limited to that produced during welding.
lN All. components shall be degreased prior to acid cicaning by an a.
appropriate method in accordance with this standard. The surfaces shall be free of gresse, oil, and foreign matter to ensure adequate surface contact by the acid and to prevent the contamination of acid solutions.
b.
Tubular items shall be given special attention during acid cleaning as restricted movement of the acid may accelerate corrosion and cause pitting.
Critical surfaces and other surfaces, specified by the pur-c.
h chaser, shall be masked during acid cleaning. Masking materials shall i
be removed im=ediately after completon of acid cleaning.
o 6
ROT F 5-lT l
PAGE 16 O
d.
Acid-cleaned surfaces shall be rinsed immediately, before they can dry, using a procedure approved by the purchaser before use in accordance with 4.2.
The final rinse water shall have a pH between 6.0 lAl and 8.0.
If acid cleaning is the final cleaning operation for the sur-face, the final rinse shall be with clean Grade A or B water. Surfaces shall not be permitted to dry between successive steps of the acid clean and rinse procedure.
Ammonia neutralization is prohibited for copper alloys.
e.
4.7.7 Steam Cleaning. Steam cleaning may be used with pur-N chaser approval in accordance with procedures specified in 4.2.
Steam cleaning equipment shall be thoroughly cleaned of materials used in pre-vious operations. Grade C or better water shall be used for steam cleaning operations. Austenitic stainless steel steam-cleaned surfaces shall be rinsed with Grade A or Grade 3 water before the component is allowed to dry.
4.8 Drying. Drying ;fter completion *of final cleaning may be accomplished by still or forced clean dry oil-free air or inert gas, in a drying oven, or by evacuation. The dew point of the air or inert gas shall be as specified in the cleaning procedure approved by the pur-chaser (4.2.). Purging and use of desiccants preparation to packing for shipment shall be in accordance with RDT F 7-2..
4.8.1 When using vacuum pumps for evacuation, ' cold traps shall be employed to prevent contamination of' cleaned surfaces by oil vapors.
When forced air or inert gas is used, it shall be passed through a trap to remove oil, water, and particulate matter before use.
4.8.2 There shall be no water marks en dried surfaces.
S.
COMPONENT PROOF FLUSil1NG 5.1 Applicability. These provisions apply to flushing components by the vendor when proof flushing with water is required by the appli-cable purchase document. The requirements and cleanliness criteria for the use of filter cloths specified herein apply only to the final flushes to demonstrate that the component is free of particulates.
5.2 Water Furity. The purity of each grade.of water used for flushing is defined in 3.21.
!Al 5.2.1 Water to be used for flushing shall be checked for clean-liness prior to use by filtering approximately 20 gal (0.076 m ) of 3
water through a filter cloth, see 3.13.
The resulting clath shall bc lAl completely free from foreign material. This c. heck shall be performed immediately prior to starting the flush, ~and the filter cloth shall be as near as practicabic to where the flush wr ter. enters the system (i.e.,
downstream of all hoses, pipes and fittings).
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1 ROT F 5-lT PAGE 17 E) t-5.2.2 The grade of water for flushing shall be as approved by the purchaser.
5.2.3 Flushing procedures shall be sequenced and care taken to preclude the flushing of contaminants from one part of the ccmpc-ant into larger, lower velocity flow regions unless otherwise approved by the purchaser.
5.3 Velocity of Flushes. The flushing velocity shall be as speci-fied in the procedures approved prior to use by the purchaser in accor-dance with 4.2 and, if practicable, shall be equal to or slightly lAl greater than the normal operating flow rate of the component.
5.4 Duration of Flushes. Flushes shall be of duration or quantity of water as specified in detailed flushing procedures. Flushes shall be repeated until two successive filter cloths or strainers meet the appli-cable clean cloth or clean strainer criteria specified in 5.5.1 and Al 5.5.2.
5.5 Flushing Acceptance Criteria. The acceptance criteria for flushing of components shall be in accordance with either Type I cr Type 11, as specified by the purchaser.
({)
5.5.1 Type I Flush Acceptcnce Criteria. Type,1 flush accep-tance criteria shall be as follows:
a.
The general appearance of the filter cloth shall be that of a clean white wet cloth showing no more than slight speckling and no more than slight soiling or staining of any kind from rust to dirt, b.
There shall be no particles on the cloth larger than 1/32 in.
(0.8 mm) in any dimension, except that fine hair-like slivers or thin flakes (much less than 1/32 in. (0.8 mm) thick] may have a major dimension up to 1/16 in. (1.6 mm).
c.
Readily apparent quantities of unusual impurities in the exit flush water or on the cloth, such as resin particles, abrasive grit, or other foreign matter, shall be reason for non-acceptance of the flush.
5.5.2 Type II Flush Acceptance Criteria. Type II flush accep-tance criteria shall be as follows:
a.
The general appearance of the filter cloth shall be that of a clean white wet cloth showing no more than slight speckling and no more than slight soiling or staining of any kind f rem rust to dirt.
b.
The strainer shall contain no parti les larger than 1/16 in.
c (1.6 mm) in any dimension, except that fine hair-like slivers or thin p
flakes (much less than 1/16 in. (1.6 =m) thick] may have a major dimen-Vi sion up to 1/8 in. (3.2 mm).
t i
ROT F 5-lT PAGE la O
c.
Readily apparent quantities of oil, brazing flux, pipe depe or sealers, preservatives, or other f oreign matter on the strainer or in the flush water after recirculation shall be reason for non-acceptance of the flush.
5.5.3 Drving. Following proof flushing, components shall be dried in accordance with 4.8.
6.
QUALITY ASSURANCE PROGRAM 6.1 Unless otherwise specified, the provisions of RDT F 2-2 shall apply in the application of the requirements of this standard.
6.2 Except as otherwise specified, facility certification and approval shall be obtained from the purchaser prior to the start of cleaning of any component.
6.3 Cleaning procedures specified in 4.2 shall be reviewed and approved by the purchaser prior to use.
6.4 Monitoring of clean rooms, clean areas, controlled areas, and cleaning operations and facilities to verify that cleanliness is in com-pliance wi;h the provisions of this standard is a requirement of this standmrd.
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6.5' Records. The supplier shall mainta'in a current and complete file of all records of inspection, examination, and monitoring data pertaining to cleaning, clean room, and clean area operation.
6.6 Access. The purchaser or his agent shall have access to any area where work associated with component cleanliness is performed and to all records pertaining to the cleaning or cicanliness of co=ponents under the contract.
7.
MAINTENANCE OF CLEANLINESS AND PREPARATION FOR DELIVERY lA2 Packaging for delivery of equipment cleaned in accordance with this standard shall meet the requirement of RDT F 7-2 unless otherwise speci-fled. Components shall be prepared for delivery as soon as practicable af ter cleaning, drying, and examination except as approved by the pur-chaser. Rust-preventive or organic materials shall not be placed on internal surfaces of components, or on external surfaces of corrosion-aw-resistant components.
7.1 The number of removable items, such as desiceant bags, pipe plugs, etc., shall be noted so that an accounting can be r.ade in the ficld to prevent inadvertently in;roducing such items into the in-stalled system. Warning notices shall be placed on the shipping con-tainer or component to specify the location and number of humidity-indicating cards, the location of gas bottles, gas bleeders, pressure i
a t
_ ~ _. - _ _ _ -
_ - _ =
_ _ =.
ROT F 5-1!
PAGE 19 3
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gages, and the type of inert gas. Any markings on wetal surfaces of the component shall meet the requirements of RDT F 7-3.
7.2 Components and subassemblies that have been cleaned in accor-A2 dance with approved procedures and which have reached the stage of fabrication or assembly where internal, critical, or crevice-containing surfaces are created or become no longer accessibic for further cleaning.
or inspection shall be scaled in accordance with RDT F 7-2 or alternate purchaser-approved procedures so as to ensure maintenance of the compo-nent or subassembly cicanliness condition. Violations of the sealing configuration, cther than those which are required by the supplier's approved procedures or authorized in writing by the purchaser, shall be the basis for rejection of the component or subassembly.
In the event there is an unauthorized violation of the sealing configuration, the component or subassembly shall be inspected to determine the extent to which the end item cleanliness requirement is violated. Where such inspection establishes that specified clean 11dess requirements have been L
compromised, procedures for bringing the affected component or subassem-t bly into conformance with the requirements of the standard shall be l
prepared by the supplier and approved by the purchaser prior to use.
8.
DATA CHECKLIST O
cedures based on this' standard:The following items shall be considered in preparing detailed pro-Item Paragraph I
1.
Procedures 4.2 E
2.
Acceptance criteria for cleanliness 4.3 3.
Rust on critical surfaces 4.3.1(a) 2 4.
Acceptance criteria for halogens 4.3.2 5.
Purchaser options 4.4.2 6.
Water used for engineering tests 4.5 7.
Grade C water use.
4.5.2 W
8.
Handling of components 4.6.7 i
9.
Acid cicaning 4.7.6(c) 10.
' Flushing acceptance criteria -
5.5 0
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s RDT F 5-1T PAGE 20 O
M Paragraph 11.
Quality assurance program 6.1 E
12.
Maintenance of cleanliness and preparation 7.
for delivery e
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