ML20062G864

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Rev 0 to Functional Requirements for Augmented Drywell Insp
ML20062G864
Person / Time
Site: Oyster Creek
Issue date: 10/04/1990
From: Tamburro P
GENERAL PUBLIC UTILITIES CORP.
To:
Shared Package
ML20062G848 List:
References
IS-402950-001, IS-402950-1, NUDOCS 9012030057
Download: ML20062G864 (23)
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Text

{{#Wiki_filter:- - - _ _ _ 4 0 UUOlear " ' ' " ^ " " IS-402950-001 Nuc.tcas Sucer Rcarcp" INSTALLATION SPECIFICATION FOR 4 OYSTER CREEK FUNCTIONAL REQUIREMENTS FOR AUGMENTED DRYWELL INSPECTION 1 l l-( i l Sk-DATE 9/20/4o PREPARATION Peter Tamburr ENGINEERING APPROVAL FP8Meneel m/k /0/2!'I* ATE /o/4 16 l OA CONCURRENCE DATE a Bil o 78A"9888d8as!!i, "EV-a P PNV o A0000023 7 M.4*

?.,' 88-408950-001 Rev. O Page 2 of 23 TABLE OF CONTENTS sECTrom U2La EA95 1.0 SCOPE 3 2.0 .2FERENCES 3 3.0 REQUIREMENTS 5 4.0 QUALITY ASSURANCE 13 5.0 INFORMATION TO BE SUBHITTED 13 6.0 EXHIBITS 1 AND 2 13 004/0040.2 ar,

4 3 18-402950-001 Rev. O Page 3 of 23 1.0 SCOPE This specification establishes the minimum requirements for the augmented ultrasonic testing (examination) program of thc >yster Creek drywell containment vessel. This specification requires UT examination of 57, 6" by 6" areas (grids) randomly chosen from all drywell plates above the sandbed elevation. Each 6" by 6" grid will be segmented into 9, 2" by 2" areas (cells). Acceptance criteria for each grid will be dependent upon the average j thickness of each 2" by 2" cell and the average of the 9 cell thicknesses. It may be necessary to expand an inspection location to an 18" by 18" area which will be segmented into 81, 2" by 2" cells. Figure #1 presents a schematic of the inspection logic for each of the 57 inspections locations. 1.1 Ultrasonic testing (UT) required by this specification is to be performed during refueling outage only. 1.2 All data shall be forwarded to Technical Functions for evaluation. 1.3 The inspections required by this specification are in addition to the inspections required by Reference 2.6. ROC shall coordinate-all activities in the drywell associated with this specification l and reference 2.6. 2.0 garannucas 2.1 ASME B&PV Code Section V, 1977 Edition through Addenda Summer, -1978. 2.2 ASME Section V, 1986 Edition. 2.3 ASME B&PV Code Section XI, 1977 Edition through Addenda Summer, r 1978. 1 1 2.4 SNT-TC-1A, 1980 Edition,'"American Society of Non-destructive Testing, Recommended Practice." 2.5 TDR 1027, " Design of a UT Inspection Plan for the Drywell containment Using Statistical Inference Methods." 2.6 CPUN Specification IS-328227-004 " Functional Drywell Requirements for Drywell containment vessel Thickness Examination" (most recent revision). 004/0040.3

.e 4 Is-402950-001 Rev. O Page 4 of 23 I i SPEC 402950-001 INSPECTION LOGIC Grid - 4' by 4' sectica 9,2' by 2* Cells 3.1.4.2 Locate inspection Point Ave Cell Thickness section 3.1.4.2. leEach Cell > LTC section 3.1.4.2.3 Each Mark Unsat Gr6 ReportTo Tsch Cell > MTC l section No Yes l 3.1.4.2.4 18

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- -. _ _ -- -._ - -. _ ~ - - ',o a 18-402950-001 Rev. O Page 5 of 23 2.7 Cs! Company Drawings 9-0971, sheets 1 through 92. 2.8 GPUN sketches 3E-sKM-339, sheets 1 through 20. 2.9 GPUN Memo 5360-SJ-396, P. Tamburro to A. Baig 3.0 REQUIREMENTS 3.1 Non-Destructive Examinations 3.1.1 Personnel Qualification 3.1.1.1 Ultrasonic personnel shall be qualified and certified as a level 2 NDE Inspector in accordance with Reference 2.4. 3.1.2 Examination Equipment 3.1.2.1 Ultrasonic examination pulse-echo equipment cap-able of thi<kness measurement by the digital and/or A-scan on a CRT screen shall be utilized. I Digital readout equipment shall have printout capabilities and memory storage traceable to sequential readings. L 3.1.2.2 Ultrasonic examination by use of robotic equipment may be performed; however, the performance of ultrasonic examination devices shall be in accordance with sections 3.1.1.1 and 3.1.2.1. UT thickness examination through paint shall be performed per qualified techniques and I l procedures. Qualification shall be performed to the satisfaction of the GPUN Manager of NDE/ISI. This qualification shall be documented. 3.1.3 Plate Number scheme and Inspection Designation 3.1.3.1 To locate each inspection location, a series of drywell plate drawings have been developed (Reference 2.8). 004/0040.5 1

ls e 15-402950-001 Rev. O Page 6 of 23 Each inspection location will be numbered in the following format: E - PN - GN where E - Plate Elevation (6, 23, 50, and 71) PN - Plate Number (per Exhibit #1) GN - Grid Number 3.1.3.2 Inspection locations have been randomly chosen and are listed in section 3.1.5 and are shown in Reference 2.8. 3.1.4 Inspections shall consist of the following for each inspection point. 3.1.4.1 The random locations have been chosen based on Reference 2.5. The inspection point shall be located by measuring first from the horizontal weld and then from the vertical welds as shown on the sketches in Reference 2.8. l Due to ALARA considerations and the randec l nature of these inspections it is not necessary j' to precisely verify the location of each inspection point. However, the robotic equipment operator or NDE Inspector shall ensure (the to best of their abilities) that each inspection point is properly locsted per section 3.1.5 and Reference 2.8. l It_is recognized that not all the randomly chosen locations may be accessible for. inspection, or surface conditions may not allow for proper UT scan. In these instances, an alternate inspection location shall be chosen (as shown in Exhibit #2) with concurrence of Technical Functions. 3.1.4.2 6" by 6" Insoection 3.1.4.2.1 The UT Inspection shall be performed over a 6" by l 6" area centered on each inspection point.- Each l ?" by 6" area (referred to as a " grid") shall be divided into 9, 2" by 2" areas (referred to as " cells"). As shown in Figure 2A. 004/0040.6 l l l

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18-402950-001 Rev. O Page 7 ef 23 UT examination shall be performed in a manner which will result in a nominal thickness value for each 2" by 2" cell (for a total of 9 values). 3.1.4.2.2 If one or more cell thickness values are less than LTc (section 3.1.4.4), then this grid shall be marked and results reported to Technical Functions as soon as reasonable (approximately 12 hours). Additianal inspections shall be determined fo). wing data evaluation. If all 9 cell thickness valuce are greater than or equal to LTc then evaluate the data per Section 3.1.4.2.3. Floure 2A l< 6"- l--2"--ll n 2" 6" Inspection Point 2" x'2" cells q t Orid i l l [ I i 004/0040.7

, 'e e e 28-402950-001 Rev. O Page 8 of 41 Floure 2B 18" x 18" Grid lT -- --- 18 "

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18" Inspection Point 2" x 2" y cel ti 3.1.4.2.3 If all 9 cell thickness values are greater than or equal to the MTc (Section 3.1.4.4), then no further inspections are required for this inspection point. Thickness values for all 9 cells shall be transmitted to Technical Functions ,p.r section 3.1.6.1). a If one or more of the 9 cell thickr.oss values are less tnan ;he MTC, then data evaluation per Section 3.1.4.2.4 shall be performed. 3.1.4.2.4 The ave sge of all 9 cell thickness values shall be cal;ulated. If the average is greater than or equal to the MTC and thw thickness value of all 9 cells is greater than or equal to the LTC, then no further inspections are required for this inspection point. Thickness dataifor the 9 cells shall be transmitted to Technical Functions (per Section 3.1.6.1). 004/0040.8

f)$ 18-402950-001 [ Rev. O Page 9 of 23 If the average is less than MTC then an expanded inspection shall be performed per section 3.1.4.3. 3.1.4.3 1A" by 18" Exoanded Insometi2D 3.1.4.3.1 An 18" by 18" expanded inspection shall be performed on all inspection points which do not meet the criteria in Section 3.1.4.2. Technical Functions shall be notified (as soon as reasonable) of all inspection points which require an 18" by 18" expanded inspection. 3.1.4.3.2 The 18" by 18" area shall be centered about the original inspection point and the 6" by 6" grid (Section 3.1.4.2). If the 18" by 18" area cannot be properly centered due to penetrations, welds, or surface conditions, the 18" by 18" area shall y be placed and oriented in a manner in which the entire 18" by 18" area is located on the original vessel plate and overlaps the original 6" by 6" grid. 3.1.4.3.3 The 18" by.18" area shall be divided into 81, 2" by 2" cells, as shown in Figure 28. U< amination shall be performed in a manner wh.ch 'will' result in a nominal thickness value L for each 2" by 2" cell;(total'of 31 values).. 3.1.4.3.4 If all-81 cell. thickness values are greater than-or equal to LTc And the average of the 81 cell. th4pkness values is greater than or equal to MTC then no further inspections are required for this inspection point. Thickness data for all 81 colle shall be transmitted to Tech Functions. x If one or more cell thickness value(s) are less l than LTC, then this-expanded inspection area l shall be marked, and results reported to Tech L Functions as soon as reasonable (approximately 12 hours). 004/0040.9 se

6 's-j e; IS-402950-001 Rev. 0 Page 10 of 23 If the average of all 81 cell thickness values is less than MTC then results shall be reported to Technical Functions as soon as reasonable (approximately 12 hours). Thickness data for all 81 celle shall be transmitted to Technical Functions (per section 3.1.6.1). ) 3.1.4.4 Thickness criterla 3.1.4.4.1 (Reference 2.9) The following Mean Thickness criteria (MTC) sh?ll be applied in section 3.1.4.2 and 3.1.4.3: Nominal Delivered Plate Evaluation Thickness HIQ 11'-3" to 23'-6" 1.154" .780" 23'-6" to 51' .77" .735" 51' to 65' .722" .695" 65' to 71'-6" 2.625" TBD 71'-6" to 95' O.64" 0.605" 3.1.4.4.2 (Reference 2.9). ' 'n The following Local Thickness criteria (LTC) shall be applied in Sections 3.1.4.2 and 3.1.4.3. Nom'.nal Delivered Plate Evaluation Thickness LIQ 11'-3" to 23'-6" 1.154" .5" 23'-6" to 51' .77" .5" 51' to 65' .722" .470" 65' to 71'-6" 2.625" TBD 71'-6" to 95' O.64" .435" 3.1.4.5 UT thickness examinations through paint shall be performed per qualified techniques and procedures. Qualification shall be performed to the satisfaction of the GPUN Manager of NDE/ISI. 3.1.5 12]L. T'anections Locations 'For the 13R outage, 57 inspection locations shall be examined (per section 3.1.4). These locations shall be examined as follows: 004/0040.10

,; e' - e-I IS-403950-001 Rev. O Page 11 of 23 Distance From Distance From Center Line of Center Line of Plate Plate Grid Vertical Weld Horizontal Weld Elevation EumkgI Number (Richt/Left) (Too/ Bottom) 6'-10" to 23'-6" 6-7 99 Left 4'- 4" Top 2'- 10" 6'-10" to 23'-6" 6-10 42 Left l'- 0" Top l'- 5" 6'-10" to 23'-6" 6-12 149 kight l'- 7" Top 5'- 5" 6'-10" to 23'-6' 6-13 185 Left O'- 5" Top 6'- 10" 6'-10" to 23'-6" 6-14 31 Right 5'- 2" Top O'- 11" 6'-10" to 23'-6" 6-16 64 Left 2'- 5" Top l'- 11" 6'-10" to 23'-6" 6-18 155 Left O'- 5" Top 5'- 11" 6'-10" to 23'-6" 6-19 88 Right l'- 4" Top 2'- 3" 6'-10" to 23'-6" 6-20 196 Left O'- 10" Top 8'- 11" 23'-6" to 50'-11" 23-8 l '. 8 Left 3'- 1" Top 4'- 0" 23'-6" to 50 -11" 23-11 629 Left 6'- 8" Bottom 7'- 0" 23'-6" to 50'-11" 23-15 726 Right O'- 6" Bottom l'- 6" 23'-6" to 50'-11" 23-17 368 Left O'- 9" Top 12'- 0" 23'-6" to 50'-11" 23-19 494 Right O'- 8" Botcom 12'- 0" 23'-6" to 50'-11" 23-20 190 Right 2'- 2" Top 11'- 6" 23'-6" to 50'-11" 23-21 256 Left 4'- 3" Top 11'- 6" 23'-6" to 50'-11" 23-22 311 Right 4'- 3" Top 12'- 6" 23'-6" to 50'-11" 23-23 22 Left 2'-11" Top l'- 0" 23'-6" to 50'-11" 23-24 216 Right 3'- 1" Top 6'- 6" Distance From Distance From Center Line of Center Line of Plate -Plate Grid Vertical Weld Horisontal Weld Elevation Number Number (Richt/Left) (Too/Bottomi 50'-11" to 65'-2" 50-1 116 Left l'- 3" Bottom 8' - 11" 50'-11" to 65'-2" 50-3 277 Left 3'- 7" Bottom l' - 11 50'-11" to 65'-2" 50-4 2 Left l'- 11" Top 7' - 11" 50'-11" to 65'-2" 50-5 277 Right 2'- 3" Bottom - 11" 50'-11" to 65'-2" 50-7 292 Left 3'- 8". Bottom l' - 5" 50'-11" to 65'-2" 50-8 597 Left 3'-11" Bottom 2' - 5" 50'-11" to 65'-2" 50-10 442 Left 2'- 5" Bottom 6' - 5" 50'-11" to 65'-2" 50-11 235 Left 3'- 3" Bottom 3' - 5" 50'-11" to 65'-2" 50-12 114 Right O'- 5" Top 2' - 11" 50'-11" to 65'-2" 50-13 85 Left O'- 6" Top 7' - 11" 50'-11" to 65'-2" 50-14 492 Left l'- 5" Bottom 3' - 5" 50'-11" to 65'-2" 50-17 219 Left l'- 8" Bottom 3' - 11" 50'-11" to 65'-2" 50-18 359 Left l'- 5" Bottom 7' - 5" 50'-11" to 65'-2" 50-19 147 Right l'- 0" Bottom 7' - 5" 50'-11" to 65'-2" 50-21 190 Right l'- 1" bottom 4' - 5" 50'-11" to 65'-2" 50-22 236 Left 3'- 11" Top 6' - 5" 004/0040.11

. 'e e IS-402950-001 Rev. O Page 12 of 23 Distance From Distance Fram Center Line of Center Line of Plate Plata Grid Vertical Wald Horizontal Weld Elevation Number Number (Left/ Rich'( fToo/ Bottom) 65'- 2" to 71'-6' 65-2 35 Right O'- 6" Top 2' - 5" 65'- 2" to 71'-6" 65-5 49 Right O'- 7" Top 3' - 5" 65'- 2" to 71'-6" 65-6 22 Left O'- 6" Top l' -11" 65'- 2" to 71'-6" 65-8 124 Right O'- 6" Bottom 0" - 5" 65'- 2" to 71'-6" 65-10 124 Right O'- 6" Bottom O' - 5" 65'- 2" to 71'-6" 65-11 18 Right 2'- 0" Top l' - 5" 65'- 2" to 71'-6" 65-13 95 Right l'- 4" Bottom l' -11" 65'- 2" to 71'-6' 6!-14 112 Right l'-11" Bottom 0" ~11" 65'- 2" to 71'-6" 65-16 85 Right l'- 9" Bottom 2- - 5" 65'- 2" to 71'-6" 65-17 113 Right l'- 5" Bottom 0" -11" 65'- 2" to 71'-6" 65-18 122 Right l'- 5" Bottom 0" - 5" 65'- 2" to 71'-6" 65-20 99 Left 0"- 10" Botte.n l' - 5" 65'- 2" to 71'-6" 65-21 122 Right l'- 5" Bottcw 0" - 5" 65'- 2" to 71'-6' 65-22 27 Left l'- 0" Top l' -11" 65'- 2" 65-23 45 Right 2'- 1" Top 3' - 5" 65'- 2" 65-24 82 Left l'- 3" Top l' - 3" 65'- 2" (5-25 119 Left l'- 11" Bottom 2' - 11" 65'- 2" us-26 32 Right 2'- 0" Top 2' - 5" 71'- 6" to 83' 71-1 461 Left 4'- 6" Bottom 5' - 1" 71' 6" to 83' 4 920 Right 3'- 0-- Bottom O' - 7" 83' to 94' 83-1 482 Left 11'- 5" Bottom 4' - 0" 83to 94' 83-4 401 Left l'- 11" Top 4' - 0" l All Specific locations are shown on Reference 2.8. l l-3.1.6 Records l 3.1.6.1 All data shall be recorded on data sheets which l identify the inspection location number (per Section 3.1.5.1) as shown in Reference 2.8. Data l l sheet format shall be consistent with Figures 2A & 28. Copies shall be transmitted to Technical Functions as soon as practical. Also, data shall be sent to Technical Functions on a floppy disk in an ASCII format. I l l t I 004/0040.12

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Page 13 of 23 3.2 Suonort Work 3.2.1 Work to be performed by the Refueling Outage Contractor (referred to as the ROC). 3.2.1.1 The ROC shall schedule and coordinate all activities necessary to perform the inspections. 3.2.1.2 When required, the ROC shall erect scaffolding. 4.0 OUALITY ASSURANCE 4.1 All work shall be performed in accordance with GPUN Operational QA Program.. This work is classified Important to Safety / Nuclear Safety Related. 5.0 INFORMATION TO BE SUBMITTED 5.1 UT data sheets and calibration sheets in accordance with Reference 2.4. 6.0. ATTACEMENTS -1 6.1 Exhibit 1 - Plate Numbering scheme shown on CBI drawing 9-0971, Sheet 2. 6.2.. Exhibit 2 - Alternate Inspection Location Selection Scheme. .i f 5 004/0040.13 . =

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] Rev. O i Page 14 of 23 l EIkIBIT #1 Plate Numbering Scheme shown on CSI Drawing 9-0971 Sheet #2 \\ r L l. l. 104/0040.14 P -4

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  • 15-402950-001 Rev. 0 Page 23 of 23 EXIIRIT #2 Alternate Inspection Location Selection Lcheme 9.

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t Floure #3 J Figure #3 illustrates the selection scheme in which an alternate inspection point shall be determined. The' original inspection point, which is unaccessible, or cannot be scanned due to surface conditions, shall be . located on the applicable sketch (Reference 2.8). If the original randomly . chosen point is unaccessible, or cannot be scanned due to surface conditions, then per Figure #2 Orid #1 shall be the alternate location. If orld #1 is also unaccessible, or cannot be scanned due to surface conditions, then Grid 2, 3, 4, etc. shall be selected until a location is accessible. If the original randomly chosen location borders a weld or penetration, and is unaccessible,then the grid which'is accessible in the clockwise direction per Figure #3 shall be selected as the alternate inspection location. In all cases, the alternate inspection location shall be located on the original vessel plate. u 004/0040.23 -}}

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