ML20204H656
| ML20204H656 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 10/03/1975 |
| From: | Capiotis M, Hoy L, Manning H GILBERT/COMMONWEALTH, INC. (FORMERLY GILBERT ASSOCIAT |
| To: | |
| Shared Package | |
| ML20204H531 | List:
|
| References | |
| SP-711-4549, SP-711-4549-00, NUDOCS 8411120344 | |
| Download: ML20204H656 (10) | |
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SP-711-4549-00 4-12 : 0NTENTS Section Item Title Ppge 1:00 DETAILED REQUIREMENTS AND S'ECIFICATIONS 1
1:01 Secpe 1
1:02 Cleanliness Inspection Criteria and Techniques 1
1:03 Acceptance Criteria 1
1:04
. Cleaning Procedures 3
1:05 Water Flushing, Cleaning, and Testing Procedures 6 1:06' Cleaning Procedures for Approval 7
.i-ATTACHMENTS Table I,_ Nuclear Power Plant Systems and Subsys: ems
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SP-711-4549-00 4-12-74 i
1
-1:00 DETAII.ED REQUIREMENTS AND SPECIFICATIO i_S_
1:01 Scope 1:01.1
. This Specification sets forth the minimum requirements which shall be observed in maintaining Class C cleanliness of materials, equipment, and components prior te_ packaging. The VENDOR is responsible for clesnliness, cleanliness maintenance, and cleanliness control prior to packaging. Each orFanization partic~ipating shall ccaply with those-requirements of this Specification applicable to his WORK.
1:01.2 Class C cleanliness is an'interirediatt level of cleanliness generally
' applicable to closed wi ter systems thvt cool primary and reactor auxiliary e ystem compon ents. In a pic:e of equipment, such as a heat
' exchanger, containing e urfaces cf two :leanliness levels the higher cleanliness level shall. apply to all ILuid surfaces. Table I identifies the specific power platit systems and tabsystems that require Class C cleanlines's. Adherent oxides are not considered to be foreign materials y
in this class, except as specified in 1:03.2 of this Specification.
Superficial atmospheric oxidaticn, such as rust on iron-carbon alloys.
is' acceptable. M111 scale is not accertable. Stains may occur as residue from chemical cleaning and may produce corrosion or pitting during service. On this basis such stains are unacceptable.
1:02 Cleanliness Inspection Criteria and Techniques INFORMATION OH, L.. Y
+
1:02.1 Clearly Visible Surfaces:
Visual examination shall be made to ensure that no traces of foreign material remain on fluid contact surfaces and that any foreign material which may damage or foul other nystems has been eliminated. Acceptance criteria shall be in accordance with Item 1:03. Examination light ir. tensity shall be at least 100 foot candles.
1:02.2
. Partially Visible Surfaces:
Surfaces which cannot be visually examined may be checked vita wiping cloths or shall be fluahed for 3 minutes and the affluent filtered thraugh a' filter cloth.* Spray rinses nay be used where flushing or wiping is not practical. See Item 1:05 of this Specification for water requirements.
~ Acceptance criteria for the proof flush shall be as outlined in item 1:03.5.
'1:03 Acceptance Criteria
[
The following acceptance standards are-to be used by the VENDOR
~immediately prior to packaging. These acceptance standards shall apply l
. * 'A bleached cotton fabric of " nainsook" (muslin) construction that weighs l-between 2.8 and 3.2 ounces per square yard (when new) and has approximately 80.to 100 yarns per inch in both the warp and fill directions.
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SP-711-4549-00 4-12-74 2
. to all internal surfac es of piping, fittings, valves, pumps, vessels, etc. and to other surf aces as specified. Components shall meet the following requirements:
1:03.1 Stainless and Other. Corrosion-Resistant Materials:
11 The surface shall appear " metal clean" when examined without magnification. Scattered flakes or areas of rust are permissible provided the area of rust does not exceed 15 square inches in any 1 square foot area. Thin temper films resulting from welding or-postweld heat treatment are acceptable.
NOTE: The persistent occurrence of rust on clean corrosion-resistant material surfaces is always considered to be of concern, since the cause could be improper materizi or processing. Rust can also be detrimental to proper functioning of system equipment. When rust occurs in corrosion-resistant surfaces, the source shall be determined and it shall be verified that the rust is not due to improper material or improper processing.
1 2.
The surface shall be free of hard gritty particulate contaminants such as sand,' metal chips, weld slag, etc.
'3.
Surfaces shall be' free of paint and debris or foreign articles.
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4.
Grease, oil, preservative, etc. are not acceptable.
hN 1:03.2 Carbon Steel Materials:
. Carbon steel surfaces shall meet the same standards as specified above for stainless steel except that thin, uniform, non-flaking rust is permitted. The following is -not acceptable:
1.
Large thick flakes or crusts of hard rust or heavy local deposits l
of soft or loose rust. This rust could cause plugging of lines.
I 2.
M111 scale or other thick, high temperature scale. This type of n
oxide is not removable by cleaning / flushing solutions that can be i
used on installed piping.
1:03.3 External Surfaces:
l Thin films of rust are acceptable provided that:
l 1.
There is no visual build-up.
'2.
There is no pitting.
l 3.
The source of rusting has been verified to be nondetrimental to the service life of the material.
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I SP-711-4549-00 4-12-74 3
1:03.4 Pitting:
Pitting is defined as visible pit-like depressions or voids or any physical build-up or discoloration in circular patterns which reveal the outline of depressions even though the depression itself is not visible.
1:33.5 Flushing Acceptance Criteria:
The proof-flush acceptance standard will be as follows:
1.
A total accumulation of particles not exceeding the volume of a cube 1/8 inch on each side per inch of pipe diameter is allowed.
2.
No particles larger than 1/16 inch in any dimension, except that hair-like slivers of less than 1/16 inch thickness are permissible up to 1/8 inch long.
3.
Staining and/or discoloration are permitted, but cloths shall be free of oil, grease, or preservatives.
4.
No readily apparent extraneous material either visible in the effluent or picked up on the filter cloth, such as non-metallic
. particles, debris, turnings, or similar foreign materials is permissible.
1:04 Cleaning Procedures 1:04.1 General:
Assemblies and constituent parts requiring cleaning shall be cleaned and degreased using a procedure (See Item 1:06 of this Specification) approved by the ENGINEER. Removal of grease and oil by detergent bath, solvent degressing, detergent steam cleaning, or similar methods is required for Class C cleaning. After cleaning, the item shall be protected from contamination until preservation or packaging is complete.
The cleaning techniques and sequences shall be consistent with the recommendations of the latest editions of the ASTM A 380 and ASM Metals Handbook, except as modified herein. The following restrictions are imposed:
1.
Wire Brushing:
Wire brushing of austetitic stainless steel shall be performed by using an 18-8 stainless steel wire brush. Wire brushes employed on carbon steel or straight chormium stainless steel material shall not be used on austenitic stainless steels.
i SP-711-4549-00 4-12-74
- s 4
i 2.
Shot, or Grit Blasting:
1 Steel shot, steel grit, silica sand, or alumina grit blasting may be used on carbon steel provided adequate inspection, such as an ultrasonic method, in used to ensure no excessive thinning of pressure boundaries (particularly in areas of bends and changes in pipe sections). Carbon steel grit or shot blasting shall not be employed on stainless steel components. Machined surfaces, threaded connections,'or other similar areas subject to liquid penetreat examination shall not be blasted.
3.
Removal of Mechanical Cleaning Particles:
I a.
Mechanical cleaning shall always be followed by additional cleaning procedures to remove contaminants, b.
Following completion of the processes in item 1:04.1 subitems 1 i
.and 2 above, the assemblies, or individual parts shall receive a thorough blast of dry, oil-free air to remove loose particles.
I 4.
Detergent Cleaning:
Detergent cleaning operations shall be specifically approved by r
the ENGINEER. The following restrfetions shall apply:
a.
Any detergent cleaning of corrosion resistant material shall be immediately followed by a thorough rinse with water of a quality specified by the ENGINEER. In no case shall the final rinse contain more than 10 ppa chlorides.
b.
Detergent cleaning shall not be used on corrosion resistant I
materials where surfaces contain crevices or areas where residual chlorides could concentrate.
If detergent cleaning is performed, the solution shall be free c.
of chlorides (< l.0 ppe).
d.
Detergents such as tri-sodium phosphate and di-sodium phosphate shall be used in a ratio to assure no free sodium (caustic).
n.
Non-ionic detergents such as Triton X, Igepal, and Alconox, which are known and accepted in nuclear plant applications shall also be used for any detergent cleaning operation.
Proprietary detergents which have not been evaluated and may e.
contain detrimental constituents such as halogens which may result in chloride stress corrosion of stainless steel parts shall not be used for detergent cleaning.
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SP-711-4549-00 4-12-74 5
5, Vapor Degreasing:
Vapor degreasing operations shall be specifically approved by the ESGINEER. Vapor degreasing shall not be used on corrosion resistant materials where surfaces contain crevices or areas where residual chlorides could concentrate. Chlorinated hydrocarbons shall not be used for degreasing solvents.
6.
Pickling:
Acid cleaning or pickling shall not be used without the prior.
written approval of the ENGINEER, and shall not be used in the case of welded 18-8 stainless steel (including weld overlay),
precipitation hardening stainless steels (e.g.,17-4 PH), hardened steel parts, nitridad or case hardened parts, or sensitized stainless steels. Ammonia and ammonia ccnounds shall not be used on copper. Special attention shall be paid when acid cleaning the Laterior of stainless steel tubes to prevent acid residues inside the tubes.
Extensive rust or scale may be removed by " pickling" after the component parts or assemblies have been previously cleaned and degreased. Pickling shall be performed'in accordance with a procedure approved by the ENGINEER. The procedures and restrictions
- of the latest edititas of ASTM A 380 and ASM Metals Handbook are reconmended as a guide to the VENDOR in formulating his procedure.
7.
Surfaces with Internal Crevices:
{
Valves and other components or 11ttings with internal crevices or complex internal parts shall be cleaned and degreased by swabbing or rinsing with technical grade acetone, or alcohol, followed by a hot distilled or domineralized water rinse. Drying shall be performed using dry, oil-free, filtered hot air.
1:04.2 Summary:
1.
All piping and equipment shall be shipped to the plant site in a I
clean and protected condition.
2.
Stainless steel omd carbon steel internal surfaces shall be free of
, millscale, rust, organic coatings, grease, oil, and debris to the degree specified in Item 1:03.
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3.
Carbon steel surfaces, when specified by the Parent Specification, shall be coated with a water-soluble corrosion inhibitor e.g., with a solution containing 1/2 weight % (w%) sodium nitrite, 1/4 w% monosidium phosphate, and 1/4 w% disodium phosphate, or with other specifically approved corrosion inhibitors.
4.
The cleaning process shall remove the soils of concern and not introduce other soils.
1 10-3-75
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5.
The cleaning process shall not damage the component during cleaning.
6.
The cleaning process shall not make the component susceptible to corrosive attack or failure at some later time in service.
7.
Residual quantities of the cleaning compounds shall not cause attack in the component service environment; or the component shall-be amenable to complete removal of al1 cleaning compounds.
'8.
All materials shall be thoroughly dried. All openings shall be securely sealed to provide a vaporproof barrier, as specified in ANSI N45.2.2.
1:05 Water Flushina Cleanina, and Testing Procedures The type of water and procedures used in flushing, cleaning, and testing shall meet the following requirements:
}
1.
Ordinary tap water may be used for any test operation at temperatures between 50 F and 150 F, except where specifically prohibited by another specification or when performed after final cleaning.
Insediately af ter the test the tap water shall be drained and flushing performed in accordance with 1:05.4 of this Specification.
4 2.
Ordinary tap water may be used at any temperature for test i
operations involving only Inconel or carbon steel surfaces.
3.
The purity of unused flush water shall be checked periodically by passing a sample of water through a millipore filter. The filter shall be completely free of all visible foreign material.
1 4.
Final flushing, cleaning, and testing, except as allowed in subitems 1 and 2 above, shall be' performed with water having the following quality:
a.
Chloride ion, maximme ppe C1 10.0
- b., Conductivity, maximum unhos/cm 400.0 4
c.
pH range 6.0 to 8.0 hh d.
Visual clarity No turbidity, oil, or sediment 4
Note: In many localities ordinary tap water will meet above requirements.
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SP-711-4549-00 4-12-74 7
1:06 Cleaning Procedures for Approvat 1:06.1 The CONTRACTOR shall submit a cleaning procedure for approval by the
-L ENGINEER. The procedure shall include, but not necessarily be limited to, the following:
1.
Precautions to be taken to avoid contamination by prohibited materials, residual cleaning solutions, and improper cleaning and flushing techniques.
.2.
The equipment to be used.
3.
General cleaning methods and sequence.
4.
Specific cleaning methods for inaccessible areas.
5.
Identification of cleaning reagents, solvents, detergents, etc.,
including concentration, purity, and indication of absence of restricted materials.
6.
Identification of water chemistry used in cleaning, flushing, and s :
testing.
7.
Drying methods and inhibitars used.
8.
Identification of inspections to be made to assure OWNER'S requirements are satisfied.
9.
Identification of procedures taken for protection from further contamination to items not immediately packaged af ter cleanliness inspection.
1:06.2 The VENDOR is advised that standard ci,eaning procedures which, although 9
diGering in detail, meet the intent of this Specification can be 4
submitted for approval by the ENGINEER. The VENDOR shall indicate specific revisions to this Specification which he requires and shall not submit an alternate specification.
If&OMAlldW ONLY
4-12-74 TABLE I NUCLEAR POWER PLANT SYSTEMS WD SUBSYSTEMS Typical Cleanliness Safety System Materials Classification Class Service Systems Instrument Air CS/Cu C
2 Nuclear Closed Cooling Water CS C
NSC l
Fuel Pool Cooling & Cleanun CS/A1/SS C
3 Emergency Closed Cooling Water CS C
3
- i Rad Waste A1/CS/SS C&D NSC & 3
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Relief. Valve Discharge to Suppression Pool CS C
3 Turbine Steam Bypass CS C
2
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INFORMATION ONLY fI~
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