ML20203A229
| ML20203A229 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 05/21/1986 |
| From: | Bajada E EVALUATION RESEARCH CORP. |
| To: | |
| Shared Package | |
| ML20202J051 | List:
|
| References | |
| CPP-022-01, CPP-22-1, NUDOCS 8607170197 | |
| Download: ML20203A229 (2) | |
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EVALUATION RESEARCH CORPORATION .
u COMANCHE PEAK RESPONSE TEAM PROJECT PROCEDURE FOR QA/QC ISSUE-SPECIFIC ACTION PLANS VII,b.3, VII.b.5 and VII.c CHANGE NOTICE: 001 1 PROCEDURE NO.: CPP-022 CCE REVISION: 0 C0tiTROL I40.-
ISSUE DATE: 05/21/86 SUPPLEMENTARY EVALUATION OF VISUAL WELDING INSPECTION TECHNIOUES Prepared By: Date: MfZI!8h*
Approved By: .b % 'a-der Date: 5 [,O / !2'[--
On-Site QA/QC Repre ntative Approved By: I b Date: f!af !8[, _ __
QAMCReviewTeamLeagr' [ /
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B607170197 860711 PDR ADOCK 05000445 A PDR
- Chengs Notico 001
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CPP-022 Revision: 0
- 1. Revise Reference 3.4 to read:
Letter on Visual Inspection of Non-Pressure Boundary Welds
( prepared by H. F. Feery, dated July 31, 1985 to V. S. Noonan, Director Comanche Peak Project Division of Licensing, NRC from W.
G. Counsil, TUCCO Executive Vice President."
- 2. Revise Reference 3.5 to read:
"QI-062,' Inspection of Non-Pressure Boundary Welds for a Supplementary Evaluation of Visual Welding inspection Techniques.' "
- 3. Change Section 5.2, in part, from:
"EEIN (Elect Equip Install)"
to "EQSP Equipment Supports."
- 4. Correct the typographical error in the second paragraph of Section 5.2.6 (after the NOTE) to read:
"...one weld connection."
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s Pogs 1 of 8 EVALUATION RESEARCH CORPORATION C0 NTRO _ D C0 3Y CONTR0L i40. DNo/
COMANCHE PEAK RESPONSE TEAM PROJECT PROCEDURE FOR QA/QC ISSUE-SPECIFIC ACTION PLANS VII.b.3, VII.b.5 and VII.c PROCEDURE NO.: CPP-022 REVISION: 0 ISSUE DATE: ((27[g[
FOR SUPPLEMENTARY EVALUATION OF VISUAL WELDING INSPECTION TECHNIQUES PreparedBy:( h, e [D ,. . Date: 9!2787
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Approved By: . Date: f-j f * ((
On-Site QA/QC Representative Approved By: Date: f 27 [f
'I Q Review Team Leader /
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- CPP-022 Revision: 0 1.0 PURPOSE This procedure describes the methodology the QA/QC Review Team will utilize in gathering and evaluating information to supplement the conclusions previously reached regarding the reinspection of safety related non-pressure boundary welds through paint.
2.0 APPLICABILITY The information developed as a result of the implementation of this procedure is applicable to the visual reinspection of completed, inspected, and accepted safety related non-pressure boundary welds being conducted by the QA/QC Review Team in accordance with ISAPs VII b.3, Pipe Support / Inspections, VII.b.5, Electrical Raceway Support Inspections, and VII.c., Construction Reinspection / Documentation Review Plan.
3.0 REFERENCES
3.1 ISAP VII.c., Construction Reinspection / Documentation Review Plan 3.2 ISAP VII.b.3, Pipe Support Inspections 3.3 ISAP VII b.5, Electrical Raceway Support Inspections 3.4. Position Paper on Visual Inspection of Painted Support Welds prepared by C. F. Reeves and H.F. Feery, J. O. 15297, dated June 17, 1985.
3.5 Quality Instruction QI (Later) 4.0 GENERAL 4.1 Responsibilities 4.1.1 The QA/QC Review Team Inspection Group is responsible for conducting the inspections of welds as required by this procedure and Reference 3.5.
4.1.2 The QA/QC Review Team Safety Significance Evaluation Group (SSEG) is responsible for conducting engineering evaluations of inspection results obtained as a result of implementation of this procedure which do not conform to VWAC or ASME (an applicable) welding i acceptance criteria.
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The QA/QC Review Team Welding Engineer is responsible 4.1.3 for the overall implementation of this procedure including the Phase II evaluation of results utilizing the results of the SSEG evaluations and the expertise of other welding, QC, and statistical consultants as l required.
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CPP-022 Rsvision: 0 4.0 GENERAL (Cont'd) 4.1 Responsibilities (Cont'd)
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The Welding Engineer is also responsible for identifying the p'ortions of this procedure which are to be witnessed by USNRC representatives and for providing appropriate notification to the USNRC of such activities when they occur.
4.1.4 The QA/QC Review Team Leader has the responsibility for the final decision of the acceptability of the QA/QC Review Team reinspection of completed non-pressure boundary welds through paint.
4.2 Poliev 4.2.1 Personnel Qualification Requirements
- a. Personnel conducting inspections shall be certified Level II or III in accordance with ANSI N45.2.6 and Regulatory Guide 1.58.
- b. All personnel participating in the implementation of this procedure shall be qualified in accordance with Para. III.H of CPRT Program Plan.
4.2.2 Procedures Development and implementation of this procedure shall be conducted in accordance with CPRT Program Plan and the ERC Management Program Plan.
4.3 Procedure Overview The development of supplementary information regarding inspection of non-pressure boundary welds through paint as specified by this procedure takes place in two phases as outlined below:
4.3.1 Phase I
- a. Selection of Samples A random sample of 60 weld connections containing completed and QC accepted site welds is selected from the ISAP VII.c populations which in turn contain non-pressure boundary welds which are to be inspected through paint by the QA/QC Review Team.
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CPP-022 Rsvision: 0 t
4.0 GENERAL (Cont'd) 4.3 Procedure Overview (Cont'd)
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'accordance with Reference 3.5 prior to removal of paint. After completion of these inspections paint is removed and all of the 60 randomly selected weld connections are reinspected to VWAC or ASME weld inspection ,
criteria as applicable. Results of the inspections are documented including any areas which are identified as not in compliance with weld acceptance criteria.
4.3.2 Phase II
- a. SSEG Evaluation of Deficient Welds Weld connections if any, which contain welds not conforming to VWAC or ASME weld inspection criteria are analyzed by the SSEG to determine the impact of the nonconforming welds on the original design of the items.
The results of these analyses are documented.
- b. Overall Evaluation of Results The inspection results from 4.3.lb. and, if applicable, the engineering evaluations from 4.3.2a., are evaluated and compared with the conclusions of Reference 3.4. Based on this l evaluation a report is developed and submitted to the QA/QC Review Team Leader which recommends whether or not' reinspection should be conducted through paint for the applicable VII.c. sopulations and, if so, what attributes should be reinspected.
- c. Final Conclusion Based on 4.3.2b. above, the QA/QC Review Team l Leader decides how to proceed with weld reinspections of the applicable VII.c populations.
5.0 PROCEDURE i
j 5.1 General This procedure will be implemented in two phases. Phase I activities include (1) definition of the population, (2) selection of the random sample, (3)' inspection of selected weld connections, and (4) documentation of results.
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CPP-022
( Ravision: 0 5.0 PROCEDURE (Cont'd) 5.1 General (Cont'd)
Phase II consist of (1) the collection, review, and evaluation of documented inspection results, (2) the analysis of data obtained (3) determination of any further evaluation required, and (4) issuance of a final report with conclusions and recommendations, if appropriate.
5.2 Phase 1 - Reinspection 5.2.1 Safety related, non-pressure boundary welds subject to this inspection procedure include the following populations as identified in Reference 3.1:
LBSN (Large Bore Pipe Supports - Non-rigid)
LBSR (Large Bore Pipe Supports - Rigid)
SBPS (Small Bore Pipe Supports)
STEL (Structural Steel)
INSP (Instr. Pipe / Tube Supports)
HVDS (HVAC Duct Supports)
COSP (Cat. 1 Conduit Supports)
PWRE (Pipe Whip Restraints)
DUPL (HVAC Ducts / Plenums)
CATY (Cable Tray)
EEIN (Elect Equip Install)
NOTE: The above populations from ISAP VII.c. were selected based on the homogeneity of the !
overall installation activities. However, ;
because of the similarity of the welding ;
processes utilized in the applicable VII.c.
populations, these populations may be grouped together into one homogeneous population for the purpose of the evaluation specified by this procedure.
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CPP-022
( Revision: 0 i 5.0 PROCEDURE (Cont'd) 5.2 Phase 1 - Reinspection (Cont'd) 5.~ 2. 2 The combined population from which the inspection sample described herein is to be selected shall be those items previously selected in accordance with Reference 3.1. (The initial sample of 60 (each) from the populations listed in Para. 5.2.1) 5.2.3 The items from each of the 11 populations shall be
, consecutively numbered 1 through 660 (11 groups x 60 each).
5.2.4 Random number tables provided by the CPRT Statistics Consultant shall be utilized to select the sample. The required sample size is 60 welded connections.
5.2.5 If the item selected has no welded connectione, that item shall be passed over, another random number selected, and another item selected until the required sample size is accumulated.
5 5.2.6 If the item selected has several welded connections, the connection to be included in the sample shall be chosen by a second random selection process.
NOTE: In general, a weld connection is defined as the total number of welds joining two members of an item or assembly together.
In certain cases, variations from this definition may occur because of the
! configuration of the item containing the connection. In these cases, the
- connections shall be reviewed and defined
, by the Review Team Welding Engineer and the applicable ISAP VII.c. Population Engineer.
, The following steps shall be conducted during the second random selection of the weld connection for the items containing more than one weld correction:
- a. The weld connections of the item shall be consecutively numbered 1 through n. For example, if the item has 10 welded connections, they shall be consecutively numbered 1 through 10.
- b. Usin}; random number tables provided by the CPRT* statistics consultant, an additional
, rand 2m number from 1 through n shall be
,' selected to identify the weld connection to
- be included in the sample of 60.
C.
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I CPP-022
( Revision: 0
, 5.0 PROCEDURE (Cont'd) x 5.2 Phase 1 - Reinspection (Cont'd) 5:2.7 Welded connections coated with paint which have been
- selected in accordance with Paragraphs 5.2.3 through 5.2.6 shall be visually inspected (through paint) by the QA/QC Review Team Inspection Group using ASME or VWAC acceptance criteria as appropriate in accordance with Reference 3.5.
5.2.8 Paint shall be removed from the weld connections which have been inspected through paint in accordance with Paragraph 5.2.7.
5.2.9 All uncoated weld connections of the sample of 60 selected in accordance with Paragraphs 5.2.3 through 5.2.6 shall then be reinspected by the Inspection Group in accordance with Reference 3.5.
5.2.10 Results of these visual inspections shall be documented and include, as a minimum, criteria utilized, weld connection identification, number of welds, identification of welder (s) and date of qualification, identification-of weld procedure and date of qualification, attributes inspected, any discrepancies including the location, description, and other information deemed appropriate for subsequent evaluation. Specific guidance is contained in Reference 3.5.
5.3 Phase II - Evaluation 5.3.1 Results of weld inspections shall be reviewed, evaluated, and analyzed during the Phase II evaluation process.
5.3.2 The selection of a sample size of 60 is intended to provide high (95%) confidence that a satisfactory evaluation of the welding process may be made utilizing data previously accumulated by the ISAP VII.c reinspections. This sample is confirmatory in nature and is not intended to serve as the basis for an accept / reject decision.
5.3.3 If discrepancies from applicable weld acceptance
- criteria are identified, they shall be evaluated by the SSEG in terms of design margin requirements and safety significance.
5.3.4 The results obtained from this sample shall. be compared with previous data from Reference 3.4 to determine if any statistically significant differences exist. If I differences exist, further evaluation may be required.
This further evaluation may include only those areas of concern identified in the sample.
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i CPP-022 l Rsvision: 0 1
5.0 PROCEDURE (Cont'd) 5.3 Phase II - Evaluation (Cont'd)~
5!3.5 The above results, as appropriate, along with any further evaluatio'ns and conclusions, shall be included in a final report to the Review Team Leader in accordance with Para. 4.3.2b. The Review Team Leader, based upon this report, will decide how to proceed with weld reinspections of the applicable ISAP VII.c 4
populations and the related ISAP VII.b.3 and VII.b.5 items.
6.0 ATTACHMENTS None J
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