ML20195F337
| ML20195F337 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 02/06/1980 |
| From: | BROWN & ROOT, INC. (SUBS. OF HALLIBURTON CO.) |
| To: | |
| Shared Package | |
| ML20195F283 | List:
|
| References | |
| FOIA-85-59 CP-CPM-6.9H, NUDOCS 8606120077 | |
| Download: ML20195F337 (21) | |
Text
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PRCCEDURE ISSUE CPSES l
NUMBER REVISI')N DATE PAGE JOB 35-il9e i
j CP-CPM 6.9H 0
2-6-80 1 of 7 I
TITLE:
ORIGINATOR g#
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'DATE-CP-CPM 6.9H y
g (APPENDIX H) j REVIEHED BY:
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CLEANLINESS CONTROL DATE 1
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APPROVED BY v
CONSTRUCTION PROJECT MANAGER DATE OGNMI DcM.z 0.1 TABLE OF CONTENTS
1.0 INTRODUCTION
2.0' GENERAL I'
2.1 APPROVAL AUTHORITY j]
2.2 RESPONSIBILITY 3.0 PROCEDURE FOR CLEANLINESS CONTROL 3.1 GENERAL 3.2 INSPECTIONS 3.3 REQUIREMENTS FOR CLEANING AND PACKAGING OF PIPING SUBASSEMBLIES 3.4 CLEANING OPERATION 3.5 PACKAGING 3.6 CLEANLINESS REQUIREMENTS FOR PIPING INSTALLATION ACTIVITIES 3.7 CLEANING MATERIALS AND METHODS 0.11 TABLES 6.9 H-1 Constituents For The Four Grades of Water 6.9 H-2 Piping System Requirements For Water Grade 6.9 H-3 Acceptable Cleaning Methods o.iii FIGURES 6.9 H-1 Cleanliness Control Boundary Tag o.iv SUPPLEMENT 6.9 H-I Cleanliness Classification, Acceptance Standards and Examination Methods 8606120077 860512 PDR FOIA QARDE85-59 PDR e
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JOB 35-1195 Comanche Peak Steam Electric Station Sheet 1 of 3 Construction Procedure DOCUMENT CHANGE NCTICE NUMBER 2
This notice applies to Construction Procedure No. 35-11954PM-6. 9H Revision 0
This change will be incorporated in the next revision of the procedure.
Change the procedure as follows:
Replace the following pages with the attached:
Page 1 of 2 Page 2 of 2 of Table 6.9H-I s
Reason for change:
Change in water grade requirements.
This change approved by:
Reviewed by:
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Originator Oate Srown & Root quality Assurance Ca:e Reviewed by:
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ARMS INDEXED
-N JOB 35-1195 Comanche Peak Steam Electric Station DATL Sheet 1 of 2 Construction Procedure DOCUMENT CHANGE NOTICE NUMBER 1
This notice applies to Construction Procedure No. 35-1195 CPM 6.9H Revision 0
This change will be incorporated in the next revision of the procedure.
Change the procedure as follows:
Replace Page 1 of I of Figure 6.9H-1, with the attached.
Reason for change:
Identification of new tagging system.
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Jhi(change approved by:
Reviewed by:
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Originator
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EJ August 19, 1980 Construction Project Manager Date Effective Date
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ESSUE CPSES.
NUMBER REVIS10N DATE PAGE JOB 35-1195 CP-CPM 6.9H 0
2-6-80 2 of 7 I
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1.0 INTRODUCTION
This appendix to procedure CPM 6.9 has been prepared to delinate the requirements for cleanliness control of piping systems at Comanche Peak Steam Electric Station (CPSES).
2.0 GENERAL 2.1 APPROVAL AUTHORITY The origination, review and approval of this document shall be as requ, ired by procedure CPM 6.1.
2.2 RESPONSIBILITY The Piping Superintendent shall be responsible for cleanliness control of piping systems.
3.0 kROCEDURE FOR' CLEANLINESS CONTROL 3.1 GENERAL Cleanliness st'andards are delineated in Westinghouse Specification 292722, and in Supplement I to this Appendix.
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-3.2 INSPECTIONS Cleanliness examinations and final inspections shall be performed in a manner that will not degrade the cleanliness of an item.
Examination equipment shall meet the same cleanliness criteria as the item to be examined and access control methods shall be adhered to.
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3.3 REQUIREMENTS FOR CLEANING AND PACKAGING 0F PIPING SUBASSEMBLIES Cleaning and packaging of piping subassemblies shall be performed to the requirements of this Section. The craft shall cap the spool and place a cleanliness tag on (or near) the cap (Figure 6.9H-1).
All visible oil and grease shall be cleaned from the spool with either MEK, Stoddard Solvent, or other approved solvents. Watertight gloves should be used with MEK.
Proper ventilation in the cleaning area snould be maintained.
All the pipe spool's interior surfaces that cannot meet the clean-liness acceptance criteria shall be flushed and dried by either still air or forced air. Compressed air shall be used to blow any debris fran spool after sandblasting operations.
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BROWN & ROOT, INC.
ISSUE CPSES NUMBER REVISION DATE PAGE JOB 35-1195 CP-CPM 6.9H 0
2-6-80 3 of 7 Following Radiographic Examination, the. radiographic technician shall recap the spool as required.
3.4 CLEANING OPERATION 3.4.1 Interior Surfaces The process pipe spools, except spools that will receive a subsequent interior coating, shall have their interior flushed when cleanliness acceptance cannot be met.
Demiraralized water shall be used as the flushing medium on all SS pipe systems and most of the CS systems.
Well water shall be used as the flushing medium for those carbon steel systems listed below:
Circulating Water Service Water Potable Water Turbine Plant Cooling Water (Tube)
Fire Protection Component Cooling Water Condenser Vacuum /Waterbox Priming Steam Generator Blowdown A high-pressure water blast nozzle shall be fed in and out of the pipe '
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spool until the acceptance criteria is met.
For best results in the cleaning operation, gradually slope the spool to allow the nozzle to travel upward into the spool.
Process pipe spools ik" to 3" diameter with more than one bend and 1" diameter and smaller normally are cleaned by fluid flushing with approximately 100 gpm.
If the cleanliness criteria cannot be met by flushing, tr.en alternate cleaning methods of sandblasting, power brush and hand brush cleaning are acceptable.
3.4.2 Exterior Surfaces When required, the SS pipe spool exterior shall be cleaned by either flushing or high-pressure water blasting.
Abrasive materials shall be properly controlled for use on either stainless steel or carbon steel by cleaning the equipment before attempting to blast a different spool material.
The carbon steel pipe spool's exterior surface will be cleaned in accordance with the applicable primer paint system requirements.
Deoxaluminite coating on pipe ends need not be removed.
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1SSUE CPSES NUMBER REV!S10N CATE PAGE JOB 35-1195 CP-CPM 6.9H 0
2-6-80 4 of 7
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3.4.3 Stainless Steel Spools The surface shall have a commercially clean appearance when examined without magnification under a lighting level of at least 100 foot candles (background plus supplementary lighting). Scattered flakes or areas of rust are pemissible provided the area in contact with the Reactor Coolant System does not exceed 1*.' of the total surface area of the piece under inspection. Thin temper films resulting from welding or post-weld heat treatment are acceptable. The surface shall be free of organic films and contaminates such as oil paints and preserva-tives. Temporary markings are acceptable.
3.4.4 Carbon Steel Spools The surface shall appear " Metal Clean", except as noted in this section when examined without magnification under a lighting level of at least 100 foot candles (background plus supplementary lighting). Thin temper films resulting from welding or post-weld heat treatment are acceptable. Temporary markings on exterior surfaces are also accept-able.
Superficial rust is acceptable. Any hard rust which foms in crusty films that tend to break off in flakes or pieces is unaccept-able.
Interior mill coatings are acceptable except as noted in Appendix 6.9E.
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- 3. 5 PACKAGING Af ter the unflanged stainless steel pipe spools have been cleaned, the ends shall be protected by plastic caps whose composition contains less than 15 PPM leachable chlorides and 10 PPM fluorides. Carbon steel spools shall be capped by either plastic or metal caps. Wood covers and plugs are also acceptable for use on all spools.
Spools that have flanged ends shall be protected from contamination by capping.
l 3.6 CLEANLINESS REQUIREMENTS FOR PIPING INSTALLATION ACTIVITIES Before moving the pipe spools to the staging areas, they should be visually inspected for internal cleanliness. Spools not meeting the cleanliness criteria shall be cleaned.
Tape used on SS surfaces shall be Nashua Corp. " Dutch Brand Number o7" or equivalent.
Once a component is installed, its outer surface shall be kept clean of hamful contaminants which would have a deleterious effect on its designed operating function. Dust and small amounts of dirt on the exterior of components both CS and SS are acceptable.
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,l CPSES NUMBER REVZS80N DATE PAGE JOB 35-1195 CP-CPM 6.9H 0
2-6-80 5 of 7 Preservatives, desiccants, etc., applied to pipe and piping components for protection during shipment and temporary storage shall be completely removed just prior to installing the component.
Open ends of components shall be covered unless work is being perform-ed on them. When welding ground cable clamps are placed on component ends, a hole just large enough to accept the clamp leg shall be slotted in the cover, and after clamp removal, the hole shall be covered with ta pe.
Immediately before fitup of pipe spools and inline components such as valves, expansion joints, strainers, etc., the visible inside surface of the component shall be visually inspected to assure that the inter-f or is free of tools, trash, rags, excess dirt, etc.
3.7 CLEANING MATERIALS AND METHODS Table 6.9H-3 provides cleaning methods and the acceptable material applications for Nonerected Components.
- 3. 7.1 Solvents Cleaning of accessible surfaces shall be accomplished using the solvents listed in Section 3.3.
3.7.2 Water Chemistry The specifications in Table 6.9H-1 shall apply to water used to clean systems. Table 6.9H-2 designates the systems and the different grades of water may be used in them.
3.7.3 Approved Cleaning Methods The Craft Superintendent n.ay choose any of the below described methods for cleaning power plant components at the construction site:
3.7.3.1 Mechanical Cleanina.
Mechanical cleaning entails the removal of debris, foreign articles, loose soils, unacceptable rust, etc., by grinding, brushing, vacuum cleaning or similar processes. Wire brushing and grinding should not be perfomed on internal surfaces not accessible for hand cleaning and visual examination unless the item is completely free of crevices.
Mechanical cleaning shall be perfomed only when needed and the material criteria of tools is met.
If grinding is performed, the minimun wall thickness requirements shall not be jeopardized.
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1SSUE CPSES NUMBER REVZSZON DATE PAGE JOB 35-1195 l 2-6-80 CP-CPM 6.9H 0
6 of 7
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3.7.3.2 Scrubbing and Wiping.
Scrubbing shall be performed only where needed using stiffbristle, nonshredding brushes with specified solvents or solutions. Wiping shall be done after all loose contamination, unacceptable rust, etc.,
have been removed using clean cloths and approved solvents. All sur-faces shall be wiped, making frequent changes of wiping cloths to prevent redeposit of contaminants.
Degreasing may be done using solvent-saturated wiping cloth. The surface must be thoroughly dried after cleaning.
3.7.3.3 Degreasing Component surfaces without crevices or inaccessible areas may be cleaned and degreased by the methods described in Section 3.7.3.2.
3.7.3.4 Solvent Immersion Bath.
Items having no inaccessible areas or crevices may be degreased by immersion in the specified solvent for the material type. The items shall be thoroughly dried immediately after cleansing.
3.7.3.5 Trisodium Phosphate (TSP) Cleaning.
TSP cleaning and degreasing may be performed on surfaces
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brushing, or flushing action using the solutions and requirements shown above as acceptable.
3.7.3.6 Jet-Blast Cleaning.
Jet-Blast cleaning may be used at sufficient volume to carry debris out of the system.
3.7.3.7 Steam Cleaning.
Steam cleaning of piping and components is an approved method of cleaning provided that demineralized water is used.
3.7.3.8 Rinsing.
Rinsing of components is essential to remove residual quantities of cleaning compounds.
Following cleaning operations, components shall be thoroughly rinsed as required.
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1SSUE CPSES NUMBER REVISION DATE PAGE JOB 35-1195 CP-CPM 6.9H 0
2-6-80 7 of 7
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t 3.7.3.9 Draining and Drying.
Following cleaning and water rinsing, and where possible, items should be thoroughly drained.
Items may be permitted to dry in air. Fans or blowers using ambient or hot air may be used to increase air circula-tion and speed up drying.
Blowers shall have a suitable filter over the suction duct to prevent blowing particulate matter into cleaned internals.
3.7.3.10 Forced Drying of Stainless or Carbon Steel Surfaces.
One or more of the following methods may be used to force dry or speed up the drying operation:
1.
Hot Air - Convenient sources of hot air are cyclon-type heating blowers (see Section 3.7.3.9 regarding blower filter).
2.
Compressed Air Snall items and small diameter piping may be dried by blowing through with dry, oil-free compressed air.
3.
Heating - Large heavy-walled items may be warmed to facilitate drying by heating from the external surface using resistance or radiant heating. Surface temperature shall not exceed a 200*F.
EXCEPTION:
Construction heat sources such as direct-fired gasoline, kerosene,. gas or actylene fuel space heaters or torches, shall not be used for direct drying.
3.7.3.11 Solvent Cleaned Surfaces.
Where only volatile solvents are used for cleaning, excess liquid solvent shall be removed with a clean, dry cloth or by blowing out with oil-free canpressed air.
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1SSUE CPSES NUMBER REVISION DATE PAGE J03 35-1195 l
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CP-CPM 6.9-H l
0 2-6-80 1 of 2 TABLE 6.9H-I CONSTITUENTS FOR THE FOUR GRADES OF WATER GRADE A - DIMINERALIZED WATER Chlorides, maximum ppm 0.15 Fluorides, maximum ppm 0.15 Ph range 6.0 - 8.0 Conductivity, inaximua nicronhos/cm 2
Total Dissolved Solids maximum ppm
.5 Cla ri ty:
No visual turbidity, oil or sediment.
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Demineralized water nonaally meets the requirarnents for Grade A water.
Where water has been subjected to possible CO,3 absorption, such as when retained in storage tanks, the pH requirement'may be lowered to 5.5 to conpensate for CO2 pickup.
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GRADE 8 - DEMINERALIZED WATER Chlorides, naximum ppn 1.0 Fluoride, maximum ppm 0.15 Conductivity, maximura micronhos/cm 20 Ph range 6.0 - 8.0 Cla ri ty: No visual turbidity, oil or sediment.
CPM-6.9H Rev. 0 CN #2 6/5/81 Sheet 2.
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NUMBER
- REVISION l CATE PAGE
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i CPSES l
e JOB 35-1195 CP-CPM-6.9H i 0
l 2-6-80 2 of 2 TABLE 6.9H-I GRADE C - WELL WATER I
Constituents Chlorides, maximum ppm 25 Flouride, maximum ppm 2.0 Conductivity, maximum micrombos/cm 400 Ph range 5.0 - 10.0 Clarity: No visual turbidity, oil or sediment
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GRADE D - RESERVOIR WATER
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Water in its natural state shall be obtained through 10 mesh or finer screen.
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PROCEDURE I
I EFFECTIVE BROWN & ROOT, INC.
NUMBER l REVISION l DATE i
PAGE I
I CPSES
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I JOB 35-1195 i
0 l
2-6-80 j
1 of 1 CP-CPM 6.9H FIGURE 6.9H-1 CLEANLINESS CONTROL TAG CLEANLINESS CONTROL TAG 1
COMPONENT s
s) s DATE INSPECTED e
INSPECTED BY m
CPM 6.9H. Revision 0, CN# 1 8/19/80 Sheet 2 of 2 E
BROWN & ROOT, INC.
ISSUE CPSES NUMBER REVISION DATE PAGE JOB 35-1195 0
2-6-80 CP-CPM 6.9-H y gf 1
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A TABLE 6.9 H-2 i
PIPING SYSTEM REQUIREMENTS FOR WATER GRADE SYSTEM GRADE FOR HYDR 0 TEST Auxiliary Feedwater B
Auxiliary Steam B
Boron Recycle A
Chemical Feed B
Chilled Water A
Component Cooling Water C
Condensate B
Condenser Vacuum /Waterbox Priming D (cooling side)
Chemical & Volume Control A
Compressed Air Air Containment Spray A
Demineralized & Reactor Makeup A
Diesel Generator Fuel Oil Feedwater B
Fire Protection D
Gland Steam 8
~l Heater Drain B
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Main Steam & Reheat B
Plant Gas Systems Air / Nitrogen (Dry)
Potable Water C (w/o additives)
Process Sampling A
Safety Injection A
Spent Fuel Pool A
Station Service Water D
Steam Generator Blowdown C
Turbine Plant Cooling Water C
Turbine Oil Purification Oil Waste Processing Gas Air / Nitrogen (Dry)
Waste Processing Liquid A
Vents & Drains Process A
Circulating Water C or D Floor Drains C or D Sanitary Sewage C or D All Stainless Steel Systems A, B, Air, or Nitrogen s
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PROCEDURE ISSUE CPSES NUMBER REVISION DATE PAGE
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JOB 35-1195 2-6-80 CP-CPM 6.9-H 0
1 of 1 TABLE 6.9H-3 ACCEPTABLE CLEANING METHODS NO.
METHOD MATERIAL I
Stainless Steel Inconel 5
8 8
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Degreasing
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ated Solvents OK OK OK OK OK OK OK I
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- b. Halogenated Solvents NO NO NO NO NO i NO i
NO i
- c. Hot TSP i
NO Solutions OK OK OK OK OK i OK j
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- d. Hot Caustic l
Solutions NO NO NO NO NO l NO NO j
OK OK 2
Steam Cleaning OK OK OK OK OK 3
High Pressure Blasting with l
Water or TSP in-hibited Water OK OK OK OK OK OK NO i
4 Wire Brushing OK OK OK OK OK OK NO 5
Water Flushing OK OK OK OK OK OK OK
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BROWN & ROOT, ZNC.
ESSUE CPSES NUMBER REVIS!0N DATE PAGE JOB 35-1195 CP-CPM 6.9H 0
2-6-80 1 of 7 APPENDIX 6.9H SUPPLEMENT I INSTRUCTION ON CLEANLINESS CLASSIFICATION, ACCEPTANCE STANDARDS AND EXAMINATION METHODS 1.0 CLEANLINESS CLASSIFICATION V Class V is a very high degree of cleanliness in which there is no evidence of surface contamination. Class V applies to the following Westinghouse components or systems:
1.
Control rod drive mechanisms 2.
Steam generator (Tubes) 3.
Reactor vessel and reactor internals equipment 4.
Reactor coolant and pump internals 5.
Pressurizer Class V cleanliness also applies to special items and other critical surfaces that have close tolerances or are carefully controlled such as recirculation pump internals.
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These items receive their required level of cleanliness at the point of manufacture and cleanliness shall be maintained at the construction site.
1.1 ACCEPTANCE STANDARDS FOR CLASS V No. surface contamination shall be evidenced under visual exam-ination either with or without magnification under a lighting level (background plus supplementary lighting) of at least 100 foot candles.
1.2 EXAMINATION METHODS Visual examination shall assure the absence of all foreign matter and substances such as chips, metal filings, welding pearls, flux, rust, dust calamine, oil, grease, or any other substance that will cause increased radioactivity in the Reactor Coolant System.
If visual examination is inhibited because of poor lighting, the complete surface will be wiped with a dry, lintfree cloth to obtain the same assurance as given above.
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BROWN & ROOT, ZNC.
ZSSUE CPSES NUMBER REVlS10N DATE ---
PAGE JOB 35-1195 Supplement I CP-CPM 6.9H 0
2-6-80 3 of 7
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3.0 CLEANLINESS CLASSIFICATION X Class X cleanliness applies to piping equipment and auxiliary systems connecting to the secondary side of the Steam Gene-rator. This classification also applies to auxiliary system equipment including storage and disposal systems of radioactive liquid and solid effluents in stainless steel systems. Class X applies to systems for:
1.
Water Treatment 2.
Demineralizer and Reactor Make-up Water 3.
Condensate 4.
Sampling 5.
Condensate Filter Demineralizer 6.
Chemical Feed 8.
Main Steam 9.
- 11. Liquid Waste Processing
- 12. Steam Generator Blowdown and Cleanup
- 13. Solid Waste Processing 14.
Gaseous Waste Processing 15.
Instrument Air
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3.1 ACCEPTANCE STANDARDS FOR CLASS X 3.1.1 Stainless and Other Corrosion Resistant Materials 1.
The interior surface shall appear "netal clean" when exami-ned without magnification under a lighting level (background plus supplementary lighting) of at least 100 foot candles.
Scattered flakes or areas of rust are permissible provided the aggregate area of rust does not exceed 10% of total inspected surface area. These temper films resulting from welding or post-weld heat treatment are acceptable.
2.
Localized pitting shall be reported to TUSI for action.
3.
The surface shall be free of particulate contaminants such as sand, metal chips, weld slag, etc.
4.
The surface shall be free of organic films and contami-nants such as oils determined by a visual examination or a solvent-dampened, white-cloth wipe.
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Supplement I CP-CPM 6.9H 6
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Whdn a visual examination of a stainless steel surface is not possible and the surfaces are accessible, a dry whitecloth wipe, followed by a solvent dampened whitecloth wipe, may be used to evaluate the cleanliness of the surface.
If either 9
cloth shows contamination, the system shall either be re-
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cleaned or the specific contaminant shall be determined and evaluated for its potential deleterious effect.
j When a visual examination is not possible and the surfaces are inaccessible, no disassembly will take place without direction t
from the Owner. The Manufacturer's or Engineer's Quality Release j
will verify cleanliness.
2.0 CLEANLINESS CLASSIFICATION W 4
Class W is a high level of cleanliness applicable to primary piping, equipment, and reactor auxiliary systems connecting to the reactor vessel. Class W consists of the following systems or components:
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1.
Fuel Pool Cooling and Cleanup 2.
. Containment Spray 3.
Chemical & Volume Control 4.
Boron Recycle
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6.
Safety Injection 7.
Residual Heat Removal 2.1 ACCEPTANCE STANDARDS FOR CLASS W i
No surface contamination shall be evidenced under visual exam-ination. Where visual examination is not possible, cleaning will be obtained by flushing on a system basis. Flushing is j
a TUGC0 responsibility.
The acceptance standards shall apply to all internal surfaces j
of piping, fittings, valves, pumps, vessels, etc., and to all other surfaces that will contact the process fluid during system operation.
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2.2 EXAMINATION METHOD The examination method for Class V applies to this classifi-
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cation (Section 1.2).
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BROWN & RCOT, ZNC.
8SSUE CPSES NUMBER REVZS80N DATE PAGE JOB 35-1195 Supplement I CP-CPM 6.9H 0
2-6-80 4 of 7 S.
Coatings and lacquers on the interior surfaces of components shall be removed from the following systems:
a.
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1 b.
Chemical Feed c.
Condensate d.
Condensate Filter Demineralizer e.
f.
Main Steam Reheat and Steam Dump g.
Secondary Sampling h.
Steam Generator Blowdown and Cleanup 1.
Steam Generator Feedwater 3.1.2 Carbon Steel Material Carbon steel interior surfaces requiring Class X cleanliness shall meet the same standards as specified above for stainless steel except that a slight amount of superficial soft rust is acceptable.
This is the type of soft rust that forms on bare carbon steel surfaces on exposure to atmospheric air in the absence of liquid water or condensation.
Any hard rust (rust forming in a crusty film and which tends to break off in flakes or pieces) is unacceptable.
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3.1.3 All Materials Surfaces of all materials shall be free of mineral deposits j
from impure water and shall be free of residues from solvents and solutions.
The acceptance standards shall apply to all internal surfaces of piping, fittings, valves, pumps, vessels, etc., and to all other surfaces that will contact the process fluid during the system operation.
3.1.4 Examination Methods Visual examination will be made to be sure the Acceptance Standards in Section 3.1 are met.
Where visual examination is not possible, cleaning verification will be done by TUGC0 Start-up during proof flush.
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8SSUE CPSES NUMBER REV8580N DATE PAGE JOB 35-1195 Supplement I CP-CPM 6.9H 0
2-6-80 5 of 7 1
s 4.0 CLEANLINESS CLASSIFICATION Y Class Y is an intermediate level of cleanliness generally appli-cable to closed-water systems and general service systems:
Class Y consists of the following components or systems:
1.
Component Cooling Water 2.
Service Air 3.
Turbine Plant Cooling Water 4.
Auxiliary Steam 5.
Turbine Gland Steam 6.
Ventilation Chilled Water 7.
Vents and Drains 8.
Condenser Vacuum and Water Box Priming 9.
Powdered Resin Disposal
- 10. Heater Drains and Vents
- 11. Turbine Oil Purification
- 12. Plant Gas 4.1 ACCEPTANCE STANDARDS r0R CLASS Y 4.1.1 Stainless and Other Corrosion-Resistant Materials 1.
The surface shall 1ppear clean when examined without magni-7 fication with non.al lighting.
2.
Scattered areas of rust are pemissible provided that the area of rust does not exceed 10% of the surface area.
3.
Surface shall be free of grease and oil.
4.
Debris and foreign material with particle size exceeding 1/64 inch shall not be present.
5.
Debris and foreign material with particle size smaller than 1/64 inch covering 10% or more of surface area shall not be present.
6.
Coatings and lacquers on the interior surfaces of components shall be removed from the following systems:
a.
Auxiliary Steam b.
Heater Drains c.
Plant Gas d.
Turbine Gland Steam System e.
Turbine Oil Purification f.
All drains to Atmospheric Drain Tank and Main and Auxiliary Condenser.
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BROWN & ROOT, 8NC.
8SSUE CPSES NUMBER REVZS10N DATE PAGE JOB 35-1195 Supplement I CP-CPM 6.9F 0
2-6-80 6 of 7
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4.1.2 Carbon Steel Material Carbon steel surfaces should meet the same acceptance stan-dards as Stainless Steel Materials (above) except that thin, uniform, nonflaking rust is pennitted. The following is not acceptable:
1.
Large thick flakes or crusts of hard rust or heavy local deposits of soft or loose rust, 2.
Millscale or other thick, high-temperature scale.
4.1.3 Examination Method Examination Methods for Class Y are the same as Class X.
5.0 CLEANLINESS CLASSIFICATION Z Class Z is the level of cleanliness requiring a nominal degree of cleanliness. Class Z consists of the following components or systems:
1.
Fire Protection 3.
Circulating Water
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5.1 ACCEPTANCE STANDARDS OF CLASS Z 5.1.1 Carbon Steel Material 1.
The surface shall appear clean when examined.
2.
Surface shall be free of paint, grease, oil, and preserva-tives.
3.
Debris and foreign material with particle size exceeding 1/64 inch shall not be present.
4.
Uniform non-flaking rust is permitted.
5.1.2 Lined Pipe 1.
Lined surfaces should meet the same acceptance standards as carbon steel material (above), with the exception of the presence of paint.
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CPSES NLNBER REVZS!ON DATE PAGE i
JOB 35-1195 Supplement I CP-CPM 6.9H 0
2-6-80 7 of 7
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Damaged liner surface shall be reported to the Paint Super-intendent. Rust on surface where liner is damaged is un-acceptable.
5.1.3 Examination Method Examination. method for Class Z is the same as Class X.
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