ML072770712
| ML072770712 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 11/07/2006 |
| From: | Tamburro P AmerGen Energy Co |
| To: | Office of Nuclear Reactor Regulation |
| SECY RAS | |
| References | |
| 50-219-LR, AmerGen-Applicant-19, FOIA/PA-2009-0070, RAS 14226 | |
| Download: ML072770712 (94) | |
Text
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U.S. NUCLEAR REGULATORY COMMISSION DOCKETED USNRC k
tOt M EI V cx).
October 1, 2007 (10:45am)
APPLICANTS EXH. 19 No.
L Official Exhibit No.2..."
Octber1, 007(1045an)
PPLCAN'S XH.19 OFFERED by~gi nsee Intervenor OFFICE OF SECRETARY 'E.
NRD Staff Other RULEMAKINGS AND N
tf te ADJUDICATIONS STAFF Passport 00546049 07 IDENTIFIED on 4 /*
Witness/Panel 4-(AR A2152754 E09)
Action Taken:
rTE EJECTED WITHDRAWN Pagel1oflO0 Reporter/Clerk Reason For Evaluation: Water Found in Drywell Trench 5 - UT Data Evaluation During the I R21 Refueling Outage, standing water was found in the trench at elevation 10' 3" in Bay 5 of the Drywell. The purpose of this technical evaluation is to develop a conservative approach to address the worst case concerns associated with the a-found.
water in ihe drywell concrete. This evaluation will assess the cofidition through comparisons of the original UT data taken in 1986, and the UT data taken during the IR.21 outage. Note that the sand and water corrosive environment was removed from the sandbed region in 1992. This evaluation will evaluate these UT results as they relate to potential corrosion concerns based on the current plant configuration with water exisiing in the drywell concrete area. This evaluation will address immediate concern's in the as-fobnd wetted area of the drywell shell to demonstrate adequate design margins exist (in a worst-case scenario) to support startup of the plant and operation of the plant through the next cycle of operatior.. The complete assessment of all UT data taken in 1R21 and establishing the associated margins to support operating through the period of extended operation of the plant will be addressed separately.
This Tech Eval was developed in accordance with CC-AA-309-101. Revision 7.
The development of this Tech Eval was reviewed with Howie Ray in accordance with HU-AA-1212. The risk rank was assessed as a "2". Therefore a third party review will be Q
performed.
Background:
In 1986 concrete was removed in two locations (one each in Bays 5 and 17) from the interior Drywell floor at elevation 10' 3". Approximately a I foot wide by 2 foot long section was removed at each location. These areas have been commonly referenced to as the "trenches". The purpose of the "trenches" was to expose the Drywell Vessel below the concrete inside the Drywell at elevation 10' 3" so that UT readings could be performed on the vessel.
The bottom of trenches in Bay 5 and 17 are located at approximately elevation 8' 9" and 9' 3" respectively, which generally correspond to the elevation of the sandbed floor located outside the Drywell. Therefore the UT readings from the original trench areas correspond to sections of the vessel that are not embedded in outside concrete. The.
results of these UT inspections were documented in TDR 851 and drawing 3E-SK-S-85.
UT readings were taken on 1 inch centers. The results of the 1986 UT inspections show drywell thicknesses which are indicative of the vessel embedded on the inside of the Drywell and exposed to the sand environment on the outside, which was eventually eliminated in 1992 when the sand was removed from the sandbed region.
In 1992, following the removal of the sand from the sandbed region and the removal of corrosion byproducts, the Drywell Vessel was visually inspected from inside the sandbed, which is outside the Drywell Vessel. This inspection identified the thinnest locations in each of the 10 sandbed bays. These thinnest locations were then UT inspected. In some Document in Portal/J
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Passport 00546049 07 (AR A2152754 E09)
Page 2 of 10 cases the area had tobe slightly grinded so that the UT probe could rest flat apainst the surface of the vessel. The thickness values and the locations of each reading, referenced from existing welds, were recorded on a series of NDE data sheets. At each locatio.n one UT reading was performed.
In 2006, UT readings of the interior Drywell shell were again recorded on I inch centers in the two trenches. These readings were intended for a comparison with the 1986 readings.
Also in 2006, 106 readings were taken of the external portion of the Drywell Vessel from within the former sandbed region. These locations were located using the 1992 NDE Inspection Data Sheet maps. These readings were intended for a comparison with the 1992 readings.
A.dditionally, during the I R2I outage in 2006 more concrete was removed from the bottom of the trench in Bay 5 to expose an additional 6" by 12" section of the drywell vessel. This newly exposed section of the vessel lies below the sandbed floor on the outside of the drywell. Therefore the results of this inspection show drywell thicknesses that are indicative of the vessel that is embedded on both sides by concrete.
Detailed Evaluation:
Assumptions and Clarifications
- 1) TDR 851 documents that values initially recorded using "D" meter UT instrumentation in the Bay 5 trench in 1986 were much less than nominal.
In order to rule out that these readings did not indicate small or pin-point corrosion cells additional NDE investigations were performed in 1986 by GPUN and EPRI NDE personnel. The investigations revealed that the low readings were due to small inclusions in the steel plate rather than thin steel. This was later confirmed by theyremoval of a 2" diameter section of the Drywell Vessel, which contained an inclusion. Lab analysis of the inclusion characterized it as an "aluminide stringer" at the mid-wall plane of the plate parallel to the rolling direction (reference TDR 854). The conclusions of this investigation were also reviewed by the NRC in an SER (dated December 29, 1986, Docket No.50-219) and found to be acceptable.
However the actual readings were captured in Drawing 3E-SK-S-85.
Inclusions of this nature and size are acceptable in the manufacturing process of carbon steel plates and do not effect the ultimate strength of the plates, If Oyster Creek were to perform an inspection of this plate for unacceptable indications then ASME Section III sub-section NB 2532 (2004) would provide acceptance criteria for indications ais identified by UT inspection..
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Passport 00546049 07 (AR A2152754 E09)
Page 3 of 10 Subsection NB 2532 provides acceptance criteria as follows:
- 1) Any area where one or more imperfection produce continuous total loss of back reflection accompanied by continuous indications on the same plane that cannot be encompassed with a circle whose diameter is 3 inches or one half the plate thicknesses, which ever is greater is unacceptable.
- 2) In addition two or more imperfections smaller than described in I above shall, be unacceptable unless separated by a minimum distance equal to the greatest:
diameter of the largest imperfection, or unless they may be collectively encompassed by the circle described in (1) above The ultrasonic equipment (Panametrics 37DL) used during I R21 displays both" a "digital thickness readout"-and an "A" scan presentation. Small inclusions whether gas or non-metallic that are flattened during the rolling prgcess create perfect sound reflectors in plate. The "A" scan presentation gives the operator the ability to distinguish between non-.
-relevant signals and true thickness readings. It'also gives the operator the ability to adjust' the appropriate signal (the one representing the full thickness) either by increasing or decreasing the gain to change the signal ramplitude or by using a feature called "extended blank" which basically tells the machine not to record readings in a certain area. These adjustments are made so the correct reading can be obtained from the controlled storage module of the instrumentation database.
A review of the 1R21 data taken in the Bay 5 trench shows that the operator made several adjustments to both the gain and the extended blank.
In addition, had any of the inclusions been large enough to block the ultrasonic signal a reading would not have been recorded. No such readings were observed in 1 R21. The inspection performed on the Bay 5 Trench during 1R21 was for thickness only, however the fact that we were able to get sound to penetrate through the entire thickness demonstrates that no area contained inclusions larger than the diameter of the transducer (0.438"). This would not have been the case due to the different technology used in 1986.
Therefore using the ASME Section III guidance for the 1986 and 2006 inspection led to the following conclusions.
In 2006 all readings located on 1 inches center were successfully obtained and back reflection were achieved on all reading. Therefore based on the size of the UT transducer no imperfections were detected, which approach 0.438 inches in diameter.
UT readings were collected on I inch centers with a UT transducer with a head size of 0.438 inches in diameter. Therefore the largest linear distance in the inspection area that would not have been scanned is approximately 0.976 inches, which is diagonal distance between two adjoining inspection points. Therefore any potential laminations approaching 1" in diameter would have been identified by the inspection and were not.
However oblong indications of up to 0.562 inches wide and that exceed 3" in length and are parallel to the grid pattern may not have been observed.
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Passport 00546049 07 (AR A2152754 E09)
Page 4 of 10 The existence of unacceptable indications is not considered credible for the following reasons:
- 1) The 1986 data shows that no three continuous 1 inch grid locations had.
indications of inclusions.
- 2) The indication would have to be oblong and parallel to the grid pattern.
- 3) Any inclusions or indications would have occurred in the manufacturing process randomly with respect to the location on the plate. Therefore, since 1986 and 2006 thickness readings are normally distributed (see attachment 2),
it can be concluded with 95% confidence that the true condition of the plate is known in 2006.
Therefore for.the purpose of this evaluation, all readings found to be lower than 0.780 inches were discounted from the 1986 readings for the trench in Bay 17. Also the.2006 data showed no similar readings (less than 0.780) in the lower 5 grids. The discounted readings are circled in attachment 1. Note that this treatment of the 1986 data is actually conservative for computing corrosion rate if they were compared to the 2006 data, because the 1986 values (if included) would have reduced the 1986 average thickness.
- 2) The uncertainties of the 1986, 1992, and 2006 UT readings can be as great as +1-.020 0
inches based on:
a) The roughness of the inspected surfaces due to the previously corroded surface of the shell in the sandbed regions b) The different UT technologies between the 1986, 1992 and 2006 c) UT Equipment Instrument Uncertainties and d) The uncertainties in attempting to inspect the exact same location over time
- 3) Row 7 points 6 and 7 in the Bay 17 trench data for 2006 were discounted because they were much thicker than the previous readings. These points are located on a much thicker weld. These readings were re-verified by NDE to be correct, however these values were discounted to maintain conservative results.
- 4) The sections of drywell vessel that were exposed by the removal of the concrete in trenches in 1986 continued to corrode from the exterior at elevated rates between 1986 and 1992 prior to the removal of the sand and epoxy coating application. For example inspection in 1992 showed that corrosion rates in Bay 17 could have been as great as 0.0211 inches per year, with 95% confidence (ref. C-1302-187-5300-021). The corrosion rates in the Bay 5 were estimated to be as great as 0.0113 inches per year, at 95%
confidence (Cl 302-187-5300-028). Therefore the material loss measured by the 2006 UT inspection would include the corrosion rates.that were known to exist from the sandbed side (exterior) between 1986 and 1992.
Document in Portal/)
Passport 00546049 07 (AR A2152754 E09)
Page 5 of 10
- 5) Direct point to point comparison of the 1986 and 2006 trench UT data cannot be preformed since the precise location of the 1986 readings and grids were not marked.
Acceptance Criteria Drywell Vessel Thickness criteria has been previously established (reference C-1302-187-5320-024) as follows:
- 1) General Uniform Thickness - 0.736 inches or greater.
- 2) If an area is less than 0.736" thick then that area shall be greater than 0.69ý," thick and shall be no larger then 6" by 6" wide. C-1302-187-5320-024 has previously dispositioned an area of this magnitude in Bay 13.
- 3) If an area is less than 0.693" thick then that area shall be greater than 0.490" thick and shall be no large+ then 2" in diameter. C-1302-187-5320-024 calculated an acceptance criterion of.479 inches however; this evaluation is conserVatively using.490.inches, which is the original GE acceptance criterion. Since the UT readings were taken on 1 inch centers and the transducer size is less than 0.5 inch these readings can be characterized as less than 2 inches in diameter.
Comparison of the Bay 5 Trench The 1986 and 2006 data for the Bay 5 trench is located in attachment 1. A Mathcad spreadsheet that computes the average of each data set is provided in attachment 2..
Please note that zero values are automatically discounted from the average and standard deviation computation. These are the values that were concluded to be inclusions in the 1986 data (see assumption 1).
The computation shows that a total of 302 readings were considered for 1986 and that the mean was 1.112 inches with a standard deviation of 0.045 inches and a standard error Of
.00259 inches. This meets the general acceptance criteria of 0.736 inches with a 95%
confidence.
The computation shows that a total of 294 readings were considered for 2006 and that the mean is 1.074 inches with a standard deviation of 0.0456 inches and a standard error of
.00266 inches. This meets the general acceptance criteria of 0.736 inches with a 95%
confidence.
Assuming the material loss occurred continuously from 1986 to 2006 results in an apparent corrosion rate of 0.0019 inches per year. However when considering the aggressive corrosive environment that existed from 1986 to 1992 on the outside of the vessel, a corrosion rate of 0.0063 inches per year would be expected during this time frame (1986 to 1992). This irate is well within the range (up to 0.0113inclhes per year)
Document in Portal/J
Passport 00546049 07 (AR A2152754 E09)
Page 6 of* 10 measured in bay 5 during this period (see assumption/clarification 4). Therefore, 't can be concluded that most of the material loss occurred between 1986 and 1992.
T'ie minimum 2006 reading in this trench was 0.957 inches. This meet/ the local acceptance criteria of 0.49 inches.
Comparison of the Bay 17 Trench The 1986 and 2006 data for the Bay 17 trench is located in Attachment 1. A Mathcad.
spreadsheet that computes the average of each data set is provided in Attachment 3. Note that zero values are automatically discounted from the average and standard deviation computation. These are the 2006 points, which were much thicker than the previous.
readings (see assumption 3).
The 1986 data consist of five, 7 row by 7 column grids and one additional row. The computation shows that.a total of 250 readings were considered for 1986 and that the mean is 1.024 inches, with 95% confidence, a standard deviation of.045 inches, and a standard errorof.002847 inches. This meets the general acceptance criteria of 0.736 inches with a 95% confidence.
The 2006 data consist of six 7 row by 7 column grids. The initial 2006 computation of the C
considered 290 readings resulted in a 0.963 inch mean with a standard deviation of.0713 inches and a standard error of.004184 inches. This meets the general acceptance criteria of 0.736 inches. Statistical review of the data shows that the distribution is skewed and cannot be considered completely normalized. Therefore the calculated mean for these six grids does not have a 95% confidence level. However closer review of the 2006 dat~a shows that the top grid has a mean (0.845 inches) which was significantly less than the mean or the lower 5 grids (0.9852 inches). Statistical review of the 5 lower grids without the top grid shows that the distribution is completely normalized.
The mean of the lower 5 grids (with a total of 243 readings) is 0.9856 inches, a standard deviation of.0412 inches, and a standard error of 0.00266 inches. This meets the general acceptance criteria of 0.736 inches and is consistent with the standard deviation and standard error of 1986 data.
This comparison indicates that it is possible that the lower 5 grids of the six measured in 2006 (with a total of 243 readings) correspond to approximately the same area that 5 grids and I row (with 250 reading) measured in 1986. However since the mean of all six 2006 grids (with 290 readings) results in a more conservative rate the 6 grid mean will be used to calculate the maximum potential corrosion rates between 1986 and 1992 and apparent corrosion rates between 1986 and 2006.
Assuming the material loss occurred continuously from 1986 to 2006 results in an apparent corrosion rate of 0.003055 inches per year. However when considering the aggressive corrosive environment that existed from 1986 to 1992 on the outside, a corrosion rate of 0.0102 inches per year would be expected during this time frame (1986 Document in Portal/J
Passport 00546049 07 (AR A2152754 E09)
Page 7 of 10 to 1992). This rate is well within the range (up to 0.0211 inches per year) metsured in bay 17 during this period (see assumption/clarification 4). Therefore, it is expected that the material loss occurred between 1986 and 1992.
In'addition the minimum 2006 individual reading in this trench was 0.702 inches which'is estimated to be located in an area no larger than 4" in diameter. This meets the.
acceptance of criteria 0.693 inches in an area.of 6" by 6" or smaller for at least an additional two years.
Comparison of external inspection locations correlating to beneath the interior Drywell floor at elevation 10' 3" but above the wetted area at elevation 9' 2".
The 1992 and 2006 data for 106 external inspections is provided in attachment 4. This attachment includes inspections that were perfgrmed above and below the internal concrete floor at elevation'l0' 3".
Review of the 106 locations show 18 areas corresponding to elevations of the drywell vessel that are beneath the interior Drywell floor at elevation 10' 3" but above the wetted area at elevation 9' 2" (see attachment 5). The data for the 18 locations is shown in attachment 6. For each of these 18 readings the 2006 value was subtracted from the 1992 value and divided by 14 years (time between 1992 and 2006). Locations with positive rates were re-verified by NDE to be correct during the 2006 inspection. However, since these values would result in positive changes in metal thickness, they were discounted from the computation to maintain conservative results.
The resulting differences in UT readings based on point-to-point comparison in this region vary between 0 and.0065 inches per year. On average the differences for this region, ignoring the described uncertainties, equate to 0.00228 inches per year.
The minimum 2006 reading of all the areas below the concrete floor was0.669 inches.
This meets the local acceptance criteria of 0.49 inches even after deducting the worst case differences including instrument uncertainties.
Comparison of External Inspection Locations correlating to beneath the wetted elevation of 9' 2" (approximate level at which water was discovered in the Bay 5 trench)
The 1992 and 2006 data for 106 external inspections is provided in attachment 4. This attachment includes inspections that were performed above and below the internal concrete floor at elevation 10' 3".
Review of the 106 locations show 22 area corresponding to elevations of the drywell vessel at an elevation below 9' 2"; which is the approximate level that water was discovered in the Bay 5 trench (see attachment 5). The data for the 22 locations is shown in attachment 6. For each of these 22 readings the 2006 value was subtracted from the 1992 value and divided by 14 years (time between 1992 and 2006). Locations with positive rates were re-verified by NDE to be correct during the 2006 inspection.
Document in Portal/]
Passport 00546049 07 (AR A2152754 E09)
Page 8 of 10 However, since these values would result in positive changes in metal thickness, ihey were discounted from the computation to maintain conservative iesults.
Tfi resulting changes based on point to point comparison varied between 0 and.0061 inches per year. On average the changes for this region would equate to 0.00233 inches per year. These values can be conservatively used to demonstrate that even if the rates are not due'to the expected uncertainties, there is sufficient margin existing to account for these uncertainties.
Bounding Worse Case
-The maximum worst case point to point difference between 2006 data and 1992 data was found at a single location at an elevation above the wetted region but below the floor at elevation 10' 3". The difference was found at point 5 in Bay 17 from data collected from the external inspection (See attachment 6 sheet 2).
This wall thickness difference was computed be subtracting the 1992 value for this point from the 2006 value without eliminating uncertainties. This point is not located within either of the trench locations. The difference in thickness at this point equates to an apparent rate of 0.0065 inches per year, which is not considered credible given the physical limitations of the UT inspections taken from the exterior surface. These limitations include the roughness of the inspected surfaces, the different UT technologies OWN used between 1992 and 2006, UT Equipment Instrument Uncertainties, and the repeatability due to trying to locate the exact same location over time.,
However even when considering this worse case difference which was recorded on a location that is 0.822 inches thick in 2006, and considering it as a loss of wall rate per year at the thinnest location recorded in 2006 for points located below the concrete floor (0.669 inches in Bay 13 point 11), and applying 0.020 inch deduction for instrumentation uncertainty this location would only reduce to 0.636 inches by 2008, which still demonstrates significant margins compared to the acceptance criteria of 0.49 inches. provides a spreadsheet that illustrates the basis for the above discussion.
Also considering a 0.0065 inches per year rate of change and applying it to the 2006 Bay 17 trench mean value (0.963 inches) and applying.020 inch deduction for instrumentation uncertainty would only reduce this value to 0.930 inches by 2008,
==
Conclusion:==
The UT measurement taken on the plates exposed by the two trenches exhibit signs of material loss. It is concluded-that most of the material loss occurred between 1986 and 1992. Assumed corrosion rates for this mechanism between 1986 and 1992 are consistent with as found measured corrosion rates previously established for these bays
^prior to removing the sand.
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Passport 00546049 07 (AR A2152754 E09)
Page 9 of 10 Additional concrete was removed from Bay 5 trench and UT readings taken 6' inches below the previous 1986 and 2006 readings. This newly excavated area represents shell thicknesses of the embedded.region (on both sides) of the vessel in Bay 5 of sandbed region. The average Drywell shell thickness measured was 1.113 inches and the minimum reading was 1.052 inches. The UT Data Sheet is Attachment 7 to this evaluation. The shell thickness in this area meets the general uniform thickness..criteria of 0.736 inches with considerable margin. This area will be used to repeat these UT measurements in IR22.
Evaluation of the NDE examination results at and below the elevation 10'3" concrete slab concludes that the Drywell shell has sufficient thickness to withstand all flesign..'
requirements.
Since there is uncertainly associated wi'th the d~fferent instrumentation used in 1986 and 1992 and the instrurmentation used in 2006, additional inspection of both trenches will be performed during the 2008 refueling outage..
References:
TDR 851, Rev. 0, "Assessment of Oyster Creek Drywwell Shell, TDR 854, Rev. 0, "Drywell Corrosion Assessment" Drawing 3E-SK-S-85.
C-1302-187-5320-024, "OC Drywell UT Evaluation in Sandbed" Attachment I - 1986 and 2006 Trench Inspection Data - 10 pages - Say 5 Trench Comparison of 1986 and 2006 data
- 17 pages - Bay 17 Trench Comparison of 1986 and 2006 data - 20 pages - 1986 and 2006 Sandbed External Inspection Data - 20 pages - Plan and Elevation locations of the External Inspection locations
-8 pages - Comparison of 1986 and 2006 External Data
- 2 pages - UT Data Sheet 1 R21 LR-032
- 2 pages -Third Party Review Documentation
- 3 pages - MPR Ass. Independent Review Documentation
- 2 pages i
.i C
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Passport 00546049 07 (AR A2152754 E09)
Page 10 of 10 Prepared by: Tamburro, P0 j7,L-i/i Q2 This evaluation was Independently Reviewed by Frank Stulb through out its development which took approximately 7 days.
Comment resolution and incorporation of the Independent Third Party Review comments were discussed with Frank Stulb per a telephone conversation on 11/3/06 at 10:12 AM.
He provided authorization for documentation and approval of his Independent Review of this document per this telephone conversation.
Independent Reviewer: P. Tamburro for F. Stulb by telecon on 11in/06
(* *-,_/L-7,// CCo 19, F. -S **,+. o, Manager Comments:
The preparer and multiple reviewers of this technical evaluation had the appropriate knowledge and experience and are qualified to perform this task. The Independent Third Party Review (ITPR) was performed by MPR who was selected as a subject matter expert based on their expertise and industry experience on this topic. This document has been rigorously challenged and addresses the adequacy of the as-found water conditions and potential impacts to demonstrate the drywell vessel maintains its design and licensing bases requirements to support restart from IR21.
Q The ITPR has been completed and comments adequately resolved as documented in.
Manager Approval: FlI. Ray 11/7/2006 Presented at Start-Up PORC Veigo.06-18 PORC Chairman Approval:
111/ 710
"'C Document in Portal/J
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00546049 07 AN# A2152754 E09 ATTACHMENT L
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.efuellng ou Data Sheet P-2 Report Number:
111211J1-Date:.
1012112006 UT Procedure.:)
ER-AA335.004 sPedricationi 1S-328227-004 I
Exiaminer. Leslie Richter ILevel:
11 linstrument Tpe -
Panametrics 3761-Plus.
Examiner. Matt Wilson
-I _Level:,
It- ]lnsftrment No:
03112)5oo=
Transducer Type:
O V 508 ISze OA.j FM.
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Transducer Cable Type: Panametics Length.
5" lcouplant:
soundde Bet~ch No:"
19620 Calibration Block Type: CIS Step Wedge Slock Number:
CAL-STEP-139 SYSTEM CALIBRATION INSTRUMENT SETTINGS Initial Cal. Time Calibration Checks Final Cal. Time Coarse Rangc 2.0" 11:01 11:32'.
12:05 12:38 Coarse Delay:.
NIA Calibrated Sweep Range==. 0.500" inches to 1.500" Inches Delay Callb:
NIA Thermometer 246U47 comp. Tamp:
- 71i, fBIock iern
.e' Range Calfb NIA
.IO Number:
C2013479 Instrument Freq.
WINA Total Crew Dose Drywell Containmnt Vessel Thickness ExaminaUoa.
a:
63, db g.r" Internal UT Inspectlons.
Damrin I
NIA Reject:.' '"
N/A Trench 1..
Filter:
.8 I..
Thickness readings taken at holes located In template.
The UT transducer was positioned In the same orientation at each grid point.
POPASSPORT#
00546049 07 2 AR# A21552754 E09 ATTACHMENT.L.
PAGE 4 OF
-L0 L--I, q
COMMENTS:.
I Template was placed at the bottom of the trench and forty-nine (49) points were recorded, then template was
!relocated above previous location with the centerline of the bottom row 1" ÷1-1116 from previous grid top row.
A:"V' was stamped next to each side of each template location and above and below top and bottom.
to1al of 294 reading were taken.
../R.? / z R-O
,0 9 oP2 0f/f OeneraI Eekdi
-Ultrasonic Thickness Measurement Oyster Creek RefuelOt-1R21 Data Sheet o 2 of 12 File Nam:
IR21.R-2 Dale:
1oW1s1o0o LIT Procedure:
ERAA-3-004 Grid Procedue:
IS-328227-004 m
.in~
~-
Bottom of Trench
-L onI' F TrejchC Bay-17 Elev.
10' 3
- B CQ E
F G
1 0.937 0.970 0.927 0.946 0.932 0.918 0.942 2
0.924 1.059 0.934 0.941 0.988 0.924 0.916 3 ~~~0948 48 0
8 0
4 2
9 7~
8
.3 0.948 o.941 0.963 0.941 0.932 0.937 0.987
-~~
T~i 0958 106 (92
.98 97 4,
0.987 o.003 1.032 0.982 0.983 0.997 0.953 027 0.977 0.9 0.973 1.005 0
.959 1.028 13 1.026 1.002 0.968 0.972 0.953 0.9640 0.990
- 7 " W 0..8 i- 008 " -&9-67 -T9-45 0.N O '1) 0.
U
,097-8 8
14 0826i 0.958 0.958 1.026 0.982 0.98 70.967 9 1.026 i0.9o6f 0.915
'0.991 1.006 0.984 0.982 S
0.979 0.933' 1.027 0.964099 0.956 1.042 11 0.963 1.003 1.016 1.062 0.969 100987 1.030 12 1.607 0.977 1.039 0.941 o98 1.027.1.039 137 1.023
- 1.001 0.959 0.997 0.974 1.003 1.032 14 0.986 1.004 1.009 0.946 1.010 1.023 0.995 159 0.96 1.069 1.014.
1.055 0.935 1.002 1.029 18 0.987 0.983 0.942 0.941100 1.04 23 1.016
- 17_
1.034 1.008 0.971 1.064 0.985 1.022 1.032 22 0.972 1.021.
0.985 0.9923 1.003 0.9.97 1,008 S10' 0.975 0.951 0.985 1.059 1.047 0.935 D.980 220 o.940. 0.67" 0.895 1.020 1.044 1.075 0.980
-61 21 09F-.87 0934 1.0-3-6 1.058 0.90.
1.-0 22 0.973 -0.95U4 1.0)04 1.013 1.011 1.043
.0.94 23 0.998 0.952 1.007 1.000 0.963 1.008.
0.951 24 OBST.
0.970 0.979 0.935 1.014 0.981 1.015 25 1.017 P 074 0.9680963 0968 0
030
- 28.
1.038 1.053 1.026 1.008 0.983 0.979 1.039 27 0.968 1.028 0.998 1.017 1.004 1.030 1.046 28 1.028 050
.047 1.000 0.977 1.010 9
0.T97 1.0237 1.050 1.015 0.964 0.995 0.997 30 1.061 0.958 1.022 1.044 0.991 0.990 1.001 31 1.008 1.021 1.010 -1010 1.003 0.959 0.963 32 0.986 0.991 1-0.961 0.9401-1.029 0,979.
0.929
- 33.
1.005 1.014 1.003 0.898 0.944 1.013 0.885 34 0.990 0.976 0.962 0.909 0.905 0.863 0.923 I 35 0,954 54 OBST.
0.WU 0.887 0.57 0.930 6
0 0.972 7
0.835 0.891 0.831 0.8N4 PASSPORT#
00546049 07 AR# A2162754 E09 ATTACHMENT,I PAGE Y. OF Z 37.
0.591 I U.9dI~
I ~
I U.O~3 I U.O.3U I U.IU1 I U.~41 38 0.855 0.884 0.853 0.850
.840 O.14 0.788 39 0.802 0.891 0.838 0.790 1 1.082 OBST.
0.809 TsrAVG.
40o.
0.746 5'.705 0.776 0.822 0.757 1.042 0.794 0.560-1,
0.963 41 U 0.2 0.77T 10.811 0.835 0.723 0.738 0.837 n eading Max. Reading 0.726 0.825i
.87
, 0.868 OBST.
0.OM4 0.954
- 702, 1.090 42 2
.0.70 0.
Examined by Je rtem Level II Examined by XLA*
Level NIA Reviewed by. Lee Stone Level II Date 10/21/2006 Date N/A Date 10/21/2006
-w-700 0 0 0 0 0 42 Template layout for 600 0 0 0 0 0 41 Trench UTdata.
50000000 40 40 0 0 0 00 O: 39.
3*00-0 000 38 I
,o.oc 2000 0 000 37
,OOOOO.OO 3-70000000 36
" Q0000000 34 4000-0000 32
"-l 0 0O 0
0 0.0 -0 32 3'0 0O0 0 0..0-0 31 30000000 310 10000000 29 70.000000 28 e0000000 27 A
,,o 30000000 24 0
40 0 0* 0'0 0
0 -25 PR#A2SS27s4ER 2003 0ATTACHMEN L
Cenerlneobol~mO~l 0 O00 O 00 022 PACE J. oF Lj.
1'
+1-1118W from previous 07 30000000 24 500 00 0"00 19
,,*-J"
-40000 000.
18 30000 000 17 20000000 1E 70000 000 214 80000000 12 40000000 0-300000 0*0 10 2.0000000 94 60000000 13 7000000-0 7
"OOO.000O0 5:
40 0 0 0
0 0
0 Template placed at Bottom 30000000 Trench 20000000 2
40 0 0 0 0 0 0-4 10000000 G
F EP C
8 A
a~q s
,1."
.1 O
PASSPORT#
00546049 07 Aft# A2152754 E09
'005"049 07 R* A2152754 E" T
C F
PASSPORT#
lrA HM _" _L AT1 rACHMENT AGE-LL OFOF
de-Plig015 AO2i~o9 I
-~
..general Eletric far Creek Ultrasonic Thickness Measurement R
Data Sheet PawI'a ofi 12 File Namewl IR2ILR-2,S bowe..).
w21200 UT ProceduWe)
ERA-3354004 Specilichtion: IS1-32827-004 Examiner-Jerem yTuttle I Leve, I lnstrumentTy:
"Penametrics 37DL Plus Examinr WA ILovel NWA Instrument No:31250 Transducer TypIL DV 506..
entdl 072362 Sz:
0.4 I Frew.
5 Mh A
Transducer Cable Type:
anametrics Length:
5 Couplart Soundsafe Batch No:
Calbraon llo Typo: C/S Step Wedge Block Numbd.
CAL-STEP-139 SYSTEM CALIBRATION INSTRUMENT SETTINGS Inhlial Cal. TOme Calibration Checks Final CaL T
.m e Coarse Range:
2.0 7:17 W22 NA 9:05 Coarse Delay:
N/A Calibrated Sweep Range =
O.5(O, Inches to 1.50(0.
Inch-a Delay CaibN NIA" Thernon.e 246e72 IConM Temp:
7W" IBlok(Ten..
6W Range Celib:
N/A W/ONumbe' I-C2013479
- 1.
a Insbunmntrreq.
W/A:
Total Crew Dose 0"oyell Coana ament Vbesel ThIcknesa ExaminatIon.
Gain:
51 II 223 Internall UT InspectIor".
Damo~nl WA Reje WA Trench 2 Day 17 Fi.te
=N/A rE Thr~clmss readings taken at holes located In template.
The UT transducer was positioned In the same orientatlon at each grid point.
00546049 07 4
g A_ MN I1 ir A
B C
2 0+/-99 0o6
,99 4000 8000 8000 F-D E
IF G
- 0.
0-00-00 0000 00.00 0000
~I I'
COMMENTS:
Grid Template aligned with V-stamps.
Template was placed at the bottom of the trench and forty-nine (49) points were recorded, then template was relocated above previous location with the centerline of the bottom row 1" +1-1116 from previous grid top row.
A total of 290 readings were taken.
All obstructons due to rough surface conditions. Some readings taken as best effort readings due to rough surface.
condilimnm I
Reviewed by-Lee Stom 'j. -- -:<. ---
I n/*l t2N1R ReieedbvLe toe I.-Level 11 Dante janblnmr
/Z e -ONPI ~2 oF9 oyieer Creek Ultrasonic Thickness Measurement ue*rM ot-I 1R21 Data Sheet I
File Naffml IR~iLR-z#--
DOWe1
- W2IJ2000 LIT Procedure:
ER-AA-335-004 GrddProcedureA kS-a2822-m0 I
mm~-JI ~~aa2 1
2 wr Bottom of Trench-Location ID Trench I
Ba Elev,.
1' 3" A-B C
D E
F G
1 i.05 1.034 1.036 1.106 1.074 1.131 1.076 2
1.061 1.021
.1.008.1.051 1.047 1.049 1.024 3
1.062 1.026 1.047 1.026 0.968 1t049 1.032 4
1.016 1.055 1.026 0.959 1.013 1.061 0.987 5
1.027 1.0460ý. 1.001 0.993 1.064 1.070 0.993 8
1.035 1.021 1.004 0.985 1.013 1.150 0.957 7
1032 1.054 1.023 1.033 0.962 0.962 0.991 8
1.065 1.023 1.069.
1.043
.1.092 1.028 1.030 9
1.1.11 1.037 1.086 1.071
.1.044 0.996 0.976 10 1.061 1.034 1.009 1.099 1.036 0.988 1.105 11 1.014 1.022. 1.028 1.142 1.064 1.040 1.041 12 1.125 1.146 1.145 1.125 1.079 1.087.
1.089 13 1.101 1.157 1.127 1.155 1.072 1.130 1.043 14 1.116 1.077 1.108 1.094 1.087 1.056 1.051
- 15.
1.127 1.042 1.119 1.126 1.079 1.102 1.075 16 1.109 1.176 1.169 1.112 1.054 1.131 1.113
.17 1.106 1.090 1.096 1.079 1.073 1.083 1.030 18 1.094 1.115 1.073 1.068 1.065 1.073 1.091
'19 1.045 1.117 1.049 1.114 1.082 1.090 1.095 20 1.111 1.123 1.117
.1.086 1.138 1.090 1.091 21 1.1'1 1.13f 1.145 1.091 1.075 1.116 1.114, 22 1.126 1.594 1.159 1.058 1.0B8 1.109 1.134 23 1.129 1.100 1.162 1.023 1.096 1.112 1.070 24 1.059 1.159 1.137 1.109 1.091 1.165 1.124 25 1.135 1.167 1.099 1.075 1.441 1.122 1.050 26 1.054 1.050, 1.038
-1.074 1.032 i.078
,1.070 27 1.134 1.045 1.026 1.082 1.171 1.145 1.17
.28 1.069 1.085 1.102 1.142 1.120 1.061 1.11V 29 1.02-0 1.065 1.8O8 1.021 1.040 1.001
.i 1.06, 30 1..085 1.0641 1.045 1.033 1.006 1.033 1.056 31 1.047 1.059 0.997 1.083 1.0180.
1.065 1.030 32 1.084 1.062. 1.063 1.105
.1.143 1.089 *.1.048 33 1.107 A.093 1.057 1.050 1.130 1.061.
1,064 34 1.099 1.066 1005 1.027 1.0441 1.018 1.073 35 1.059 1.118,..040 1.023
.1.03 1-65 1.0 38 1.067 1.072 1.041 1.035 1.030 1.015 1.047 Io*2 ~-
~
37 1.0931 1.U*Ul I UVVI -I.u3V 1.0331 0.9921 1.03:
-.38 1.142 4
1..09) 1.086 1.0]6 1.039 1.048 39 11.1511 1.122
.12 1.0741 1.115 1.073
.1.049 Tsr AVG.
40 1.132 1
1.103 1.106 1.683 1.052 1.047 0.660 1.074 41 1.1T7 i.130 1-139 1.119f 1.106I 1.084 1.087 Min Reading Max.Readlg 42 M
i.113 7
1.11 1.097 7
1.122 1.13j1 1.104 1.60673 0.967 1.e7 7 0op I.....
I
,Examined by Leslie Richter Examined by Matt Mon Reviewed by: Lee Stone Level 11 Date 10121/2006 Level It Date 1012112006 Level II Date 10/21/2006 h
AWN,/e~q 3:~F4 PASSPORT#
00846049 -07 g
AR# A2152754 E09 PAGEe OF
V 70000000
.600000-0 SQ000000 "4000000-3000.0000
ý20 0 0 O0 0 00
.0000000.
42 Template layout for 41 Trench UT data.
40
- 39 38 37 386 qzo'p W.~-
lS from previous
~
70 60 so 40 30 20 40 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0.
0 0
0 0
0 0
0 0
.0 0
0 0
00
-E I"
I....
70 do 50 40 30 20
-0 0
0 0
0 0.
00 00 00 00 0 0 0 0 00 00 0
0
.0 0
0 00 0
0 0.
.0 0
0 r) 01 0
0 0.
0 0
00 0
35 34" 33
-32 31 30 29 28 27 26.
,25
.24 23 22 21 20 19
'18 17 10 15 14 13 12
-11 10 9
8
,70 60"
-40 30 20 4Ct) 0 0
0 0
0 0
C) 0 0
0 0
0 0.
C) 0 0
0 0
0 0
C) 0 0
0 0
0 0
(-)
0 0
0 0
0 0.
0 0
0 0
0 0
0
-ii 70 Go 50
'40 30 20 0
0 0
0 0
0 n
0 0
0 0
0 0
C) 0 0
0 0
0 0
C) 00 0
0 0
0 C')
00 0
0 0
0 00 0
0.
0 0
C) 0 70 (O
sO.
40 30 20 10G 0-0 0
0 0
0 F
00 00 00 00
-00 00 00 E.P 0
0 0
0 0
0 0
C 0
0 0
0 0
0 0
B 00 0
0-0 0
0 A
7 8
5
-4 32/
Template placed at Bottom of Trench
Passport 0546049 07 Tech Eval. A2152754 E09 -
Bay 5 Trench 1989*Data The data shown below was collected in 1986 in the trench in Bay 5 page := READP1tN( "H:*MSOFFICEDrywelI Program data\\1986 trenches\\Trench5-.ixt")
Points 4 9 := showcells(page, 7,0)'
Sheet No.
1 of 17 I
Points 4 9 =
1.156 1.16 1.165 1.145 1.123 1.128 1.123 1.166 0
1.164 1.151 1.151 1.138 1.149 1.182 1.172 1.184 1.173 1.151 0
1.158 1.162 1.148. 1.167 1.141 1.157 1.13 0
1.225 1.175 0
1.155 0
i.158 0
1.181 1.171 1.17 11.159 1.139 1.144 0
1.171 1.176 1.17 1.172 1.156 1.159 0
XXXS := convert(Poincs 4 9, 7)
No DataCells := length(XXXS)
XXXS deletezero ceI1s(XXXS, No DataCelis) page :=READPRN("H:\\MSOFFICE\\Dryweli Program data\\1986 trenches\\Trench5-2.txt")
Points 49 := showcells(page, 7,0)
Points 4 9 =
1.109 1.064 1.051 1.063 1.047 1.125 1.135 1.121 1.066 1.096 1.1 1.109 1.123 1.091 1.144 1.068 1.041 1.11 1.149 1.09 1.107 1.155 1.115 1.077 1.048 1.13 1.117 1.08 1.156.
1.1 1.162 1.101 1.176 1.182 1.084 1.149 1.109 1.078 1.11 1.179 1.2 1.125 1.155' 1.124 0
.133 1.058 1.182 1.183 XXX := convert (Points 49,7)
No DataCeils =ength(XXX) deletezero XXX, N XXX :=deletezirV culs(XXX, NO DataCells)
Cells 86 := stack(XXX, XXXS)
No DataCelts =ength(Cells 86)
G No DataCells = 89
Passport 0546049 07 Tech Eval. A2152754 E09 page:= READPRN( "H:*MSOFFICE\\DryweI Program data\\1986 trenches\\Trench5-3.txt")
Points 4 9 := showcells(page, 7,0)
Sheet No.
2 of 17 Points 49 =
1.094 1.043 1.058 1.087 1.18 1.138 1.109 1.064 1.079 1.055
-049 1.118 1.071 1.082 L.067 1.052 1.082 1.058 1.093 1.109 i.158 1.079 0 1.079 1.119 1.044 1.071 1.114 1.083 1.043 1.062 1.137 1.096 1.098. 1.166 1.169 1.14 1.164 0 0
1.13" 1.053 1.16 1.178 1.15' 0
1.19, 1.134 1.05
.1 4
6 XXX :=convert(Points 49.7)
No DataCells - lengtb(XXX)
XXX :=deletezero cells(XXX, NO DataCells)
Cells 86 :=stack(Cells 86,xxx)'
0 No DataCells :=ength(Cells 86)
No DataCells = 134 page:= READPRN("H*\\MSOFFICEDrywel1 Program data\\1986 trenches\\Trench5-4.txt")
Points 4 9 :=showcells(page, 7,0)
Points 4 9 =
1.141 1.159 1.166 1.109 1.089 1.126
.1.069.
1.128 0
1.127 1.148 1.167 i.092 1.054 1.089 0
1.105 0
0
.1.178 1.112 1.154 1.17 1.174 1.166 1.18 0
1.089 1.164 0
1.169 1.171 1.128 1.167 1.146 1.141 1.122 1.151 1.105 1.105 1.131 1.113 1.141 1.133 1.106 1.124 1.072 1.119 1.098 XXX '%-convcrt(Points 49, 7)
No DataCells I=
length(XXX)
XXX :=deletezero ceis(XXXNoDataCells)
Cells 86-stack(Cells 8 6, XXX)
No DataCells length(Cells 86) 0 No DataCells = 177
Passport 0546049 07 Tech Eval. A2152754 E09 page:= READPRN( "H:1-:[SOFFICE\\Drywell Program data\\1986 tIenches\\Trench5-5.txr)
Points 49 := showcells(page, 7,0)
Sheet No.
3 of 17 0
Points 4 9 1.076 1.118 1.067 1.088 1.094 1.128 1.065 1.056 1.054 1.073 1.106 1.119 1.134 1.077 1.098 0 1.1 1.159 1.11 1.205 1.171 ' 1.193 1.115 1.148 1.125 0
1.179 1.168 1.139 1.098 1.06 1.062 1.149 1.09 1.04[
1.134 1.092 1.118 1.147 1.145 1.077 1.068 1.077 1.101 1.113 1.093 1.109 1.112 1.073 XXX: :convert(Points 49,7)
.No DataCells :=length(XXX)
XXX :=deletezero cells(XXX. No DataCells)
'Cells 86 :=stack(Cells 86,XXX)
NO DataCells :=length(Cells 86)
No DataCells = 224 0
page:= READPRN("H:\\MSOFFICEDrywell Program data\\1986 trenches\\Trench5-6.txt')
Points 49 := showcells(page,7,0)
Points 4 9 =
1.062 1.101
- 1.1 1.062 1.044 1.052 1.031 0
1.035 0 1.024 1.103 o0 1.057 0
1.141 0
1.057 1.076 1.03 1.021 1.088 1.059 1.045 1.073 1.06 1.059
.1.015 1.069 1.074 1.11 - 1.079 1.083 1.081 1.059 1.109 1.016 1.074 1.061 1.062 1.028 1.089 1.067' 1.078 1.076 1.062 1.037 1.076 1.09 XXX := convert(Points 49, 7)
No DataCells :=Iength(XXX)
XXX:=deletezero i15(XXXN DaCells)
Cells 86 :=stack(Celo, 86' No DataCells:= length(Cells 86) 0 page'= READPRN("H:AMSOFFlCE\\Drywell Program data\\1986 trenches\\Trench5-7.xt" )
Points 4 9 := showcells(page, 7. 0)
Passport 0546049 07 Tech Eval. A2152754 E09 Sheet No.
4 ofI17 Points 4 9 =
1.087 0
1.168 1.271
.1.211 0
0 1.11 1.132 1.112 1.138 3.158 0
0 1.027 1.049 1.113 1.117 1.099 0
0 1.04 1.096
.1.101 1.103 1.133 0
0 1.07 1.052 1.056 1.152 1.134 0
0 1.079 1.081 1.093 1.092 1.065 1.108 1.142 1.108 1.145 1.108 0
0 0
0 XXX :=convert(points 49,7)
No DataCells:= length(XXX)
XXX :=deletezero cells(XXX, No DataCells)
Cells 86 &=stack(Cells 86, XXX)
No DataCeils.= length(Cells 86)"
No DataCells = 302 NO DataCells = 302 The thinnest point at this location is shown below minpoint:= min(Cells 86) minpoint=10513 C
Passport 0546049 07 Tech Eval. A2152754 E09 Sheet No.
5 of 17 Mean and Standard Deviation p86 actual := mean(Cells 86) p86 actualo
.1123103 086 actual := Stdev(Cells 86) 086 actual = 45-002 I
Standard Error 086 actual Standard error c8 at"
,]No DataCells Skewness (N6 DataCells) '.(Cells 86 p86 actual) 3 Skewness o
(NO DaaCells-. 1 ) '(NO Data.Cells'- 2).-(086 actual)3 Standard
= 2.59
.1*
Skewness = 0.132 Kurtools C
Kloi No DataCelis' (NO DataCells-I) '(Cells 86-p86 actual) 4 (Noss-,so Da
- 1)'(No DataCels-2)(NO DataCells-3).(°" actual) 4 3 -(NO DataCell-1)2 (No DataCells - 2). (No DataCeils-3)
Kurtosis ='-0.534
.Q
Passport 0546049 07 Sheet No.
Tech Eval. A2152754 E09 6 of 17 Normal Probability Plot In a normal plot, each data value is plotted against what its value would be if it actually came froMn a normal distribution. The expected normal values, called normal scores, and can be estimated by first calculating the rank scores of the sorted data.
j :-0.. tast(Cels 86) sr :=sort(Cells 86)
Then each data point is ranked. The array rank captures these 'ranks rank.-,
srt:srtj).r Isrt=srt.
rank Jrows(Cells 86) + I The normal scores are the correspondingpth percentile points from the standard normal distribution:
X:= I N_Score := rootcnorm(x)- (pi) x]
Passport 0546049 07 Sheet No.
Tech Eval. A2152754 E09 7 of 17 Upper and Lower Confidence Values The Upper and Lower confidence values are calculated based on.05 degree of confidence "Y No DataCells length(Cells 86) a:=.05 Ta:= qj
.~No DataCellj Ta =1.968 Lower 95%Con :=t86 actual-Ta 86 actualLowe95%Cn 1.107103 4l~oDataCells o86 ata Upper 95%Con :=p86 actual+ TaN
,Upper 95%Con 1 1.17-103
.foDataCellsUpe 5Cn=1170 These values represent a range on the calculated mean in which there is 95% confidence.
Graphical Representation Distribution of the "Cells' data points are sorted in 1/2 standard deviation increments (bins) within +1-3 standard deviations 0
Bins:= Make bins(p8.6 actual, 086 actual) 3 14 42 Distribution := hist(Bins. Cells 86) 45 Distribution =
54 541 The mid points of the Bins are calculated 41 43 45 k :=0.. l I (Bins,,+ Binsk- )
1" Midpointkk k+
2 2
2 2
The Mathcad function pnorm calculates a portion of normal distribution curve based on a given mean and standard deviation normal curve0 :=pnorm(BinsIp86 actual, 086 actual) normal curve:= pnorm(Binski-I,1p86 actual, a86 actual)- pnornn(Binfsk' p86 actual,Y86 actual) normal curve := No DataCelsnormal curve
Passport 0546049 07 Tech Eval. A2152754 E09 Sheet No.
8 of 17 Results For Elevation Sandbed elevation Locatlobn Oct. 2006 The following schematic shows: the the distribution of the samples, the normal curve based on the actual mean and standard deviation, the kurtosis, the skewness, the number of data points, and the the lower and upper 95% confidence values. Below is the Normal Plot for the data.
Data Distribution minpoint = 1.015o103 Standard error = 2.59, Skewness = 0.132 Kurtosis = -0.534 Distribution
.1.
nonmal cuv 0
I
.950 1000 1050 1100 1150 1200 1250 Midpoints. Midpoints Lowe-,9S%.Conl
- 1. 107e 103 VJ86 actual ý 1112*10 3 UPPer 9 5%Con = 1.1 176.l0 086 actual = 45.002 minpoint = 1.0 15910 A Kurtosis Value which is less than +/- 1.D and approaches 0 is indicative of a normal distrubution
Passport 0546049 07 Tech Eval. A2152754 E09 Normal Probability Plot Sheet No.
9 of 17 I
j i
x
.. X x 2
.0 0
N.-ow.
xxx 1300 The Normal Probability Plot.
and the Kurtosis this data is normally distributed.
-1
-3L low0 I
I I
I 1050 I200 1150 1200
- 122, A Normal Probability Plot which approaches a straight line is. indicative of a normal distrubution C©
Passport 0546049 07 Sheet No.
Tech Eval. A2152754 E09 10 of 17 OCT 2006 Data The data shown below was collected in 2006 in the trench in Bay 5
/
page:= READPRN("HA:MSOFFICE\\rywell Program data\\2006 trenchs\\Trench5-1.txt" )
Points 4 9 :=showcells(page,7,0) 1.067 1.072 1.041 1.035 1.03 1.015 1.047 1.093 1.05 1.099 1.039 1.033 0.992 1.033 1.142 1.094 1.099 1.086 1.086 1.039 1.048 Points 49 =
1.151 1.122 1.112 1.074 1.115 1.073 1.049 1.132 1.115 1.103 1.106 1.083 1.052 1.047 1.137 1.13 1.139 1.119 1.106 1.084 1.087 1.113 1.131 1.097 1.122 1.131 1.104 1.063 XXXS convert(Points 49.7)
No DataCells := length(XXXS)
CO XXXS =deletezero ceuls(XXXS,No DataCells) page:= READPRN("H:AMSOFFICEDrywell Program data\\2006 trenchs\\Trench5-2.txv)
Points 4 9 :showcells(page, 7. 0) 1.02 1.065 1.068 1.021 1.04 1.001 1.066 1.085 1.064 1.045 1.033 1.006 1.033 1.056 1.047 1.059 0.997 1.083 1.018 1.065 1.03 Points 49 = 1.084 1.062 1.063 1.105 1.143 1.089 1.048 1.107 1.093 1.057 1.05 1.13 1.061 1.064 1.099 1.066 1.005 1.027 1.044 1.018 1.073 1.059 1.118 1.045 1.023 1.039 1.068 1.087 XXX: convet(Points 49,7)
No DataCells:- length( XXX)
XXX :"deletezero ells(XXX. No DataCells)
Cells.o6 -,stack(cxx, XXXS)
No DatCells -ength(CeI-s.o)
No DataCells = 98
I Passport 0546049 07 Sheet No.
Tech Eval. A2152754 E09 11 of17 page =READPRN("H:\\&SOFFICE\\DrywelI Program data\\2006 trenchs\\TrenchS-3.txt')
Points 49 :=showcells(page,7,O) 1.126 1.094 1.159 1.058 1.088 1.109 1.134 1.129 1.1 1.162 1.023 1.096" 1.112 1.07 1.089 1.159 1.137 1.109 L.091 1.165 1.124 Points 4 9 1.135 1.167 1.099 1.075 1.141 1.122 1.05 1.054 1.05 1.036 1.074 1.032 1.078 1.07 1.134 1.045 1.026 1.082 1.171 1.145 1.178 1.069 1.085 1.102 1.142 1.12 1.061 1.116 XXX := convert Points 49, )
1*
,nr.
No DataCells length(XXX)
XXX :=deletezero celIs(XXX, No DataCells)
Cells o:stack(Cells 6, xxx)
No DataCells length (Cells 06)
No DataCells 147 page :=READPRN("H:\\MSOFFICE\\DrywelI Program data\\2006 trenchs\\Trenchs-4.txt")
Points 4 9 :=showcells(page,7,0) 1.127 1.042 1.119 1.126 1.079 1.102 1.075 1.109 1.176 1.169 1.112 1.054 1.131 1.113 1.106 1.09 1.096 1.079 1.073 1.083 1.03 Points 4 9 =
1.094 1.115 1.073 11.068 1.065 1.073 1.091 1.045 1.117 1.049 1.114 1.082 1.09 1.095 1.11.1 1.123 1.117 1.086 1.138 1.09 1.091 1.151 1.131 1.145 1.091 1.075 1.116 1.114 X conver (Points 49, 7)
"No DataCells:" length(XXX)
XXX:" deletezero cells(CXXXNO DataCells)
Cells 06 stack(Cells 6, XXX)
No DataCells :=length (Cells o)
No DataCells = 196
Passport 0546049'07 Tech Eval. A2152764 E09 Sheet No.
12 of 17 page :=READPRN("H:AMSOFF1CEkDrywell Program data\\2006 trenchs\\Trench5-5.txt")
Points 49 :=showcells(page,7,0)
Points 49 =
1.065 1.023 1.069 1.043 1.092 1.028 1.03 1.111 1.037 1.086 1.071 1.044 0.996 0.976 1.061 1.034 1.009 1.099 1.036 0.988 1.U05 1.014 1.022 1.028 1.142 1.064 1.04 1.041 1.125 1.146 1.145 1.125 L079 1.087 1.089 1.101 1.157 1.127 1.155 1.072 1.13 1.043 1.116 1.077 1.108 1.094 1.087 1.056 1.051
. a
. I JN3CX:=convert(Points 49,7)
No DataCells:= Iengt(XXXC)
XXX ;=deletezero cels(XXX, No DataCells).
Cells 06 :zstack(CeIIs 06' XXX)
No DataCells :-length(Ce1I 0 6)
No DataCells= 245 page:= READPRN("H:-\\MSOFFICE\\Dxywell Program data\\2006 trenchs\\Trench5-6.txt")
Points 4 9 := showcells(page, 7.0)
Points 49 =
1.059 1.034 1.036 1.106 1.074 1.131 1.078 1.061 1.021 1.008 1.051 1.047 1.049 1.024 1.062 1.026 1.047 1.026 0.968 1.049 1.032 1.016 1.055 1.026 0.959 1.013 1.061 0.987 1.027 1.046 I.001 0.993 1.064 3.07 0.993 1.035 1.021 1.004 0.985 1.013 1.15 0.957 1.032 1.054 1.023 1.033 0.962 0.962 0.991 XXX :=convert (Points 49,7)
No DataCells:= length(XXX)
XXX := deletezero cells(XXX. NODatCeIls)
Cells o
=stack (Cells 06, XXX)
No DataCells:= length(Cells 06)
No DataCells = 294 minpoint := min(XXX) minpoint = 957 l
The thinnest point at this location is shown below minpoint := min(Cells 06) minpoint = 957
Passport 0546049 07.
Tech Eval. A2152754 E09 Sheet No.
13 of 17.
?Vcb%
I Mean and Standard Deviation
'06 actual:*: mean(Cels 06) p06 actual 1.0743. 03 (06oacual :Stdev(Cels 06) a actual= 45.628 Standard Error c06 actual Standard emrr
,N Standard e 2ror 2.661. o, Skewness Ske s (NO Dat ells)
(CeIs 06 P06 actual)
(No Datas-) 1). (NO DataCells 2)1.(06actual) 3 Skewness -0.071 Kurtosis
,0
.I 4
Kurosis.
No DataCejis'N DtaCelis+ 1).-(C""s 06 - p06 ata (No DataCells-
).(NO DataCells, 2) -(No DataCells-3).(6 actual)4
+
3.(No DataCe
" )12 (No DataCe.,-
- 2) -(No DataCel,-
3)
_Kurosis, = -O.32 0
Passport 0546049 07 Sheet No.
Tech Eval. A2152754 E09 14 of 17 Normal Probability Plot In a normal plot, each data value is plotted against what its value would be if it actually came frot a normal distribution. The expected normal values, c alled normal scores, and 'can be estimated by first calculating the rank scores of the sorted data.
j :=O. last(Cells 06) srt :=sort(Ceils 06)
Then each data point is ranked. The arnay rank captures theseranks z1 :=ji. 1 rankr J'=,,
Pi o(
,o*t(,06)7 I.
The normal scores are the correspondingpth percentile points from the standard normal distribution:
X: 1.
Nscore.
ricnorm(x) - (p) x]
Passport 0546049 07 Sheet No.
Tech Eval. A2152754 E0G 15 of 17 Upper and Lower Confidence Values The Upper and Lower confidence values are calculated based on.05 degree of confidence a, V
S a:=.05 Ta:=:q I(.--
NODataCells Ta= 1.968.
Lower 95%Con :=:p06 actual - T, a06 actual Lw"9%o
.6.0 actual Lower 1.069'.0 3 Lpwer 95%Con :=PO6 actualt Ta U p p er S % C O
- =ux 6 8 ~ ~ i1-T t
~
ctu a U a 9 5% C o n 1I.0 8 1 0 These values represent a range on the calculated mean In which there is 95% confidence.
Graphical Representation Distribution of the 'Cells' data points are sorted in 1/2 standard deviation increments (bins) within +/- 3 standard deviations S.
2 Bins'.=Make binm(iA6 actual, a6 actual)4 13 28' Distribution:= hist(Bins, Cells 06) 24 Distribution 51 The mid points of the Bins are calculated 48 42'
'33
_(Binsk-Binsk 14 k:= 0.
11
~
Midpointsk,:,!
2
+
0._ 1 The Mathcad function pnorm calculates a portion of normal distribution curve based on a given mean and standard deviation normal curve :=pnorm(Bins, lp6 actual,(6 actual) normal civek :=,pnorm(Binsk. i,,,.o6 actuo c,.,o 6actual) - p,,or,,(,inSk.,O6 actua,. a
,0actual) normal curve:= O.DataCells".ormafcurve
Passport 0546049 07 Tech Eval. A2152754 E09 Sheet No.
16 of 17 Results For Elevation Sandbed elevation Locatlobn Oct. 2008 Th6 following schematic shows: the the distribution of the samples, the normal curve based gn the actual mean and standard deviation, the kurtosis, the skewness, the number of data points, and the the lower and upper 95% confidence values. Below is the Normal Plot for the data.
Data Distribution I,
d ir minpoint = 957 Standard eor =i.661 Skewness = -0.071 Kurtosis --0A32 9W0 950 1000 1050 1100 Midpoints, Midpoints 1150 1200 I =
Lower 95%Con = 1.069.10 UPPer 95%Con 1.08u 10 p06 actual 1.0740 10~
a06 actual = 45.629 minpoint = 957 A Kurtosis value which Is less than +/- 1.0 and approaches 0 is indicative of a normal distrubution
.11
Passport 0546049 07 Tech Eval. A2152754 E09 Sheet No.
17 of 17 Normal Probability Plot The Normal Probabflky Plot and the Kurtosls this data is northally distributed.
N...Scoroj xxx 1000 1050 HIOD 1150 1200-51 1 j.
A Normal Probability Plot which approaches a straight line is indicative of a normal distrubutlon Corrosion Rate assuming corrosion occured between 1986 and 2006 (1186 actual -06 actua) 1.9 2006-1986 Corrosion Rate assuming corrosion occured between 1986..and 1992
( P86 *c ft W-p* 6 ac tua l) 6.334 1992-1986 0,
C Tech Eval A21162754 E09 Bay 17 Trench 1986 Data The data shown below was collected in 1986 in the trench in Bay 17 page:= READPRN( "H:*MSOFFICE\\DrywelI Program data1 986 trenches\\Trench 17-i.txt")
Points 49 :=showcells(page,7,0)
Sheet No.
1 of 20 Points 49 =
0.93 0.932 1.014 0.953 0.991 1.005 0.995 0.995 1.025 1.011 1.017 1.036 1.041 1.055 0.943 0.984 0.951 1.038 0.968 L.029 1.044 0.958 0.987 0.968 1.031 1.024 1.031 1.047 0.927 0.973 0.939 0.992 1.004 1.084 1.043 0.889 0.913 0.939 0.956 0.945 0.956 1.003 1.011 1.002 1.055 1.026 1.05 0
"0 XXXS :=converd(Points 49,7)
No DataCells:= length(XXXS)
XXXS := deletezero cells (XXXSNO DataCells)
GridTopl1986 := XXXS page :=READPRN("H:MSOFFICE\\Drywell Program data\\1986 trenches\\Trenchl 7-2.txt")
Points 49 := showcells(page, 7,0)
Points 4 9 1.045 0.991 1.031 1.087 0.998 0.964 0.906 1.009 1.012
- 1.101 1.059.
1.065 1.019 1.04 1.024 1.041 1.081 1.069 1.048 0.987 1.019 1.026 1.031 1.077 1.057
.1.004 1.055 0.98 1.008 1.017 1:04 1.102 1.014 1.045 1.024 1.07 1.076 1.076 1.088 1.016 1.022 1L01 1.07 1.076 1.072 1.047 1.016 1.061 1.014 XXX:= convert(Points 49, 7)
No DataCells iength(XXX)
XXx := deleteze cells(XXX NQ DataCells)
Cells 86 := stack(XXXXXXS)
No DaIaCells length(Cells 86)
C No DataCells = 96
Sneet No.
Tech Eval A2152754 E09 2 of 20 page:= READPRN("H:MSOFFICEADrywel! Program data11986 trenchcs\\Trench17-3,txt")
Points 4 9 :=showcells(page,7,0)
/
0.964 1.105 1.083 1.011 1.047 1.016 1.028 1.063 1.012 1.029* 1.047 1.056 0.972 0.907 1.021 1.097 1.071 1.068 1.033 0.911 0.952 Points 4 9 1.066 1.023 1.006 1.063 1.045 1.035 0.992 1.052 1.037 1.044 1.078 1.05 1.054 1.051 1.037 1.015 1.026 1.064 1.07 1.056 1.044 1.065 1.059
,.026 1.058 1.047 1.067 1.075 XXX convert(Points 49.7)
No DataCells :=length(XXX) xx: deletezero cells(XXX, No DataCells)
Cells 86 :=stack(Cells 86' XXX)
NOlDalaCells length (Cel
- 86)
No DataCells =145 page := READPRN("H:AMSOFFICE\\Drywmll Program data\\1986 trenchesfTrench17-4.txt")
Points 49 := showcells (page, 7,0) 1.088 1.046 1.019 1.103 0.993 1.086 1.041 1.056 1.045 0.995 1.044 1.042 1.026 1.116 1.102 1.001 1.044 1.082 1.028 1
1.08 Points 49 = 1.106 1.05 1.002 1.017 1.042 1.034 1.037 1.069 0.965 0.988 1.122 1.034 1.032 1.07 1.097 1.028 1.051. 0.951 1.059 1.015 1.005 1.135 1.022 1.076 1.058 0.952 0.981 1.023 XXX :convert(Poirts 49.7)
No DataCells length(XXX)
XXX :-deletezero ce1is(XXX, No DataCells)
Cells 86 -stack (Cells 86XXX)
No DataCells length (Cell.s 86)
No DataCells " 194
rOOaIJW 4 uu Oto UI Tech Eval A2152754 E09 page := RFADPRN("H:VMSOFFICE\\Drywell Program data\\1986 trenches\\Trenchl7-5.txt")
Points 4 9 := showcells(page, 7, 0)
Sheet No.
3 of 20 Points 49 =
1.023 1.1 1.053 1.005 0.972 0.985 0.999 1.049 1.017 1.03 1.049 0.985 0.979 0.987 0.987 0.958 1.025 1.006 1.012 0.974 1.021 1.085 1.044 0.987 1.058 1.009 0.961 0.958 1.048 1.072 0.991 1.056 1.031. 1.059 1.058 1.011 1.067 1.017:
1.017 1.008 0.954 1.064 0.98 1.074 F087 0.992 0.975 0.982 0.942 XX.X,.convert(Poinis 49,7 )
No DataCells:= length(XXX)
XXX :=deletezero elIs(XXX, No DataCells)
Cells 86 :=stack(Ce11s 86,XXX)
No DataCells := lcngth (Cells 86)
No DataCells = 243 page' := R1ADPRN("H:RMSOFFICE\\Dryw ell Program data\\19B6 trenches\\Trench l1-6.txt" Points 4 9 ::showcells(page,7,0) 4, Points 49 =
0.923 0
0 0
0 0
0 0.981 0
0 0
0 0
0 0.976 0
0 0
0 0
0 0.97 0
0 0
0 0
0 0.964 0
0 0
0 0
0 0.99 0
0 0
0 0
0 1.004 0
0 0
0 0
0 XXX :=convert(Points 49,7)
No DataCells:: length(XXX)
XXX:= deletezero ces(XXX-NO DataCells)
Cells 8 6:= stack(Cells; 86' xxx'ý No DataCells "2 length(Cells 86)
No DataCells = 250 The thinnest point at thin location is shown below C© minpoint := min(Cells 86) ininpoint = 889
rassporn UUb41049 07 Tech Eval A2152754 E09 Sheet No.
- 4 of 20 Mean and Standard Deviation p86 actual: mean(Cels 86) 1186 actual= 1.023901 3 o86 actual :=Stdev(Celis 86) 686 actual = 45.019 Standard Error a86 actual Standard error :=-
rNo DataCells Skewness Skewness:
(No Datacels) :(Cels 86-86 6 ac
)
(No
(
DaaCels I). (No DataCells -*). (086 actual)3 Standard error =2.847 Skewness = -0.387 Kurtosis No DataCells.(No DataCclls+ 1).X(Cells 86-p86 actual)4 (No DataCells -I ).(No DataCeLls-2).(No DataCells-3) (086 actual) 4
+.
3"(NODataCells-1)2 (No DataCells - 2) (No DataCells-3)
Kurtosis = -0.033 0
u S h e e t N o.
Tech Eval A2152754 E09 5 of 20 Normal Probability Plot In a normal plot, each data value is plotted against what its value would be if it actually came from a normal distribution. The expected normal values, called-normal scores, and can be estimated by first calculating fhe rank scores of the sorted data.
j:=0.. last(Ce~ls 86) srt '=sort(Ccnls 86)
Then each data point is tanked. The array rank captures these ranks rank.
ss I'srt srt rank.
- - rows(cells86).1 The normal scores are the correspondingpth percentile points from the standard normal distribution:
X:=lI x := I N-Score.:=roo cnorm(x) -
~
r*n*opI t IUU:qVU'IV UI Tech Eval A2152754 E09 Sheet No.
60o 20 Upper and Lower Confidence Values The Upper and Lower confidence values are calculated based on.05 degree of conlidence 'as
/
No DataCells ::length (Cells 86) a:=.05 Ta :z{;(1 -I), No DataCells]
Ta = 1.969 LOwer 95Con :
actual Ta actual Fo aDataCells 086 actual Pr 95%Con P86 actual+.
.JNO DataCells LOWer 95%Col= 1081 Upper 9 5%Con =1.02961 03 These values represent a range on the calculated mean in which there is 95% confidence.
,Graphical Representation Distribution of the Cells* data points are sorted in 1/2 standard deviation increments (bins) within +1-3 standard deviations
.0 Bins :Make bins(p86 actual, 086 actual)
Distribution := hist(Bins, Cells 86)
The mid points of the Bins are calculated Distribution =
U 4-,
5.
13 17 3o0 47..
2o 44 3
=0--
k:=O.. 11 Midpoints, k = (BinSk.~+Binsk+I).
2 The Mathcad function pnorm calculates a portion of normal distribution curve based on a given mean and standard deviation normal curve,:= PpnoM(BinSl. 86 actual, 086 actual) normal curvek := pnorm(Binsk
,i, p86 actualo 6 actual) - pnorm(Binsk., p86 actual, 086 actual)
,© normal curve :=No DataCells'normal curve
Tech Eval A2152754 E09
.Sheet No, 7 of 20 Results For Trench 17 1986 Data The following schematic shows: the the distribution o1 the samples, the normal curve based on the actual mean and standard deviation, the kurtosis, the skewness, the number of data points, and the the lower and upper 95% confidence values. Be.low is the Normal Plot for the data.
Data Distribution Distribution
.L-rnomnl OMYC minpoint 8i9 I,
Standard error 2.847 1
Skewness =-0,387 Kurtosis = -0.033 1150 0
900 950.
1000 1050 1100 Midpoints,Midpoilas Lower 95%Con = 1 -0 18-103 P 86 actual =10003 Upper 95%Con = 1.029*103 c8 6actual V4 5.019 minpoint = 889 A Kurtosis value which is less than +/- 1.0 and approaches 0 is indicative of a normal distrubutton Normal Probability Plot 3
2 0
NScorej xxx
Žx.
EX E
The Normal Probability Plot and the Kurtosis this data is normally distributed.
-I
--2
-3 0
850 900 950
.!00o sit 1050 1100 1150 A Normal Probability Plot which approaches a straight line is indicative of a normal distrubution. Therefore the 1986 Bay 17 trench data had a normal distribution.
ria~p'J' & vuu40,'4%f ul Tech Eval A2152754 E09 2006 Data The data shown below was collected in 2006 in the trench in Bay 17 page ;= READPRN("H:\\MSOFFICEDrywell Program datIU006 trenchs\\Trench7-U.txt")
Points 49 := showcells(page.7,O)
Sheet No.
8 of 20 0.963 0.897 0.855 0.802 0.746 0.702 0.726 Points 4 9=
0.972 0.937 0.884 0.891 0.795 0.779 0.825 0.877 0.903 0.853 0.838 0.776 0.811 0.878 0.835 0.893 0.85 0.79 0.822 0.835 0.868 0.891 0.838 0.84 1.082 0.757 0.723 0
0.831 0.781 0.814 0
1.042 0.7.38 0.864 0.894 0.841 0.788 0.809 0.794 0.837 0.954 XXXS :=convert(Points49, 7)
XXXS := deletezero cells(XXXS, No DataCells).
0 No DataCells :=ength(XXXS)
Grid Top2006-XXXS page:= READPRN( "HI:\\MSOFFMCE\\oDwell Program data\\2006 trenchs\\Trench17-2.txu)
Points 49 := showcells(page, 7,0)
Points 49 =
0.997 1.06 1.
1.008 0.988 1.005 0.99 0.954 1.023 0.958 1.021 0.991 1.014 0.976 0.954 1.06 1.022 1.01 0.961 1.003 0.962 0
1.015 1.044 1.01 0.94 0.896 0.909 0.885 0.964 0.991 1.003 1.029 0.944 0.905 0.887 0.995 0.99 0.959 0.979 1.013 0.863 0.877 0.9971 1.0011 0.963 0.929 0.885
.0.923 0.93 XXX := convert(Points 49,7)
No DataCells := length(XXX)
XXX:= deletezero eeils(XXX,o DataCells)
Cells 06 :=stack(XXX, XXXS)
No DataCells =length(Cells 0)
NoD©
.ll:
og,(el 6 Grid 2 XXX No DataCells = 95
- ~
.r,~a
%of Tech Eval A2152754 E09 Sheet No.
9 of 20 page:= READPRN("H:\\MSOFFICE\\Drywell Program data\\2006 b'enchs\\Trenchl7-3.txt")
Points 4 9 := showcells(page, 7,0)
Points 4 9 =
0.973 0.998 0
1.017 1.038 0.968 1.028 0.954 0.952 0.978 1.074 1.053 1.028 0.95 1.004 1.007 0.979 0.968 1.026 0.998 1.047 1.013 1.011 1
0.963 0.935 1.014 0.963 0.966 1.008.0.983 1.017 1.004 1
0.977 1.043 1.006 0.981 1.014 0.979 1.03 1.002 0.948 0.951' 1.015 1.03 1.039 1.046 1.01 XXX := convert(Points 49,7)
NO DataCells: Iength( XXX)
XXX := deletezero cells(XXX, No DataCells)
Cells 06 :=stack(Cells 06, XXX)
Grid 3 := XXX No DataCells:= length (Cells 06)
No DataCells = 14 3 page:= READPRN("H:\\MSOFFICE\\Drywell Program data\\2006 trenchs\\Trenchl7-4.txt")
Points 4 9 :=showcells(page,17,0)
Points 49 =
0.966 0.987 1.034 0.972 0.975 0.94 0.918 1.069 0.983 1.008
.1.021 0.951 0.967 0.897 1.014 0.942 0.971 0.985 0.985 0.895 0.934 1.055 0.941 1.064 0.992 1.059 1.02 1.036 0.995 1.01 0.985 1.003 1.047 1.044 1.058 1.002 1.023 1.022 0.997 0.935 1.075 0.998 1.0291 1.016 1.032 1.008 0.98 0.98 1.009, XXX := convert(Points 49,7)
No DataCells:= length(XXX)
XXX:= deletezero cells(XXX, No DataCells)
Cells 06 stack(Celis 06, XXX)
Grid 4 :==XJ No DataCetls:= lngth(Cells 06)
No DataCeils = 192
Tech Eval A2152754 E09 page ;= READPRN("H:'.MSOFFICEDrywell Program datak2006 trenchsTrench 17-5.txt")
Points 4 9 '=showcells(page,7,0)
Sheet No.
10 of 20 Points 49 =
1.026 0.979 0.963 1.027 1.023 0.986 0.958 0.906 0.933 1.003 0.977 1.001 1.004 0.958 0.915 1.027 1.016 1.039 0.959 1.009 1.026 0.991 0.934 1.062 0.999 0.997 0.946 0.982 1.006 0.969 0.969 0.998 0.974 1.016 0.988 0.984 0.956 0.987 1.021 1.003 1.023 0.967 0.962 1.042 1.03
.1.039 1.09 0.995
. I XXX := convert(Point' 49,'7)
No DatiCells:' length(XXX)
XXX :=deletezcro cells(XXX,0No DataCells)
Cells o6 :=stack (Cells 06, XXX)
NO DataCells:= length(Cells 06)
Gid 5 :=XXX No DataCells = 241 page :=READPRN("H.\\MSOFFICE\\Drywel Program data\\2006 trenchs\\Trenchl7-6.txt")
Points 49 :=showcells(page,7,0)
Points 49 0.937 0.924 0.948 0.977 0.972 1.026
.0.981 0.97 1.059 0.948 0.983 0.932 1.002 1.006 0.927 0.934 0.963 1.032 0.977 0.968 0.967 0.946 0.941 0.941 0.982 0.973 0.972 0.945 0.932 0.968 0.932 0.983 1.005 0.953 0.968 0.918 0.924 0.937 0.997 0.959 0.964 0.943 0.942 0.916 0.967 0.953 1.028 0.99 0.978 XXX := convert(Potnts 49,7)
No DataCells := length(XXX)
XXX := deletezero cells (XXX, No DataCells)
Grid 6 :=XXX Cells 06 := stack(Ceils 0 6, XXX)
NO DataCells := length(Cells 06ý No DataCells = 290 minpoint:= min(XXX) minpoint = 916 The thinnest point at this location is shown below minpoint := rain(Cells 06) minpoint = 702
r a a -,.-ý--S Ut Tech Eval A2152754 E09 Sheet No.
11 of 20 Mean and Standard Deviation p06 actual := mean(Cells 06) p06 actual a 962.7897
- 06 actual :=Stdev(CelIs 06) o0 6 actual= 71.259 Standard Error Standard
.o( 06 actual error DataCels Standard error a 4.184
.I, Skewness "40 ata~lIC ':'cIIs 0 0
c Skewness --
oo'~w ký 06 cia (No0 DataCels-1).'(No DataCeIls-2) (006 actual)3 Skewness = -1.252 Kurtosls NODataCos*(NO DataCells-I).(CeIs 0 6 i06 actal)4 Kurtosis:=
(No DataCells-1)'(No DataCells-2).(No DataCels-3)"(006 actual)4
+
3
)'(No DataCel-s1
)
(No DataCells-2).(No DataCells-3)
Kurtosis = 1.587 C
raoooput t VU uuqvL'q4 Ui Tech Eval A2152754 E09 Sheet No.
12of 20 C
Normal Probability Plot
.In a normal plot, each data value is plotted against what its value would be if it actually came from a normal distribution. The expected normal values, called normal scores, and can be estimated by first calculating the rank scores of the sorted data.
j -=.
last(Ce's 06 srt :=sort(Cells 06)
Then each data point is ranked. The array rank captures these ranks z
+
- =j ÷ I rank Pj rows(Cells 06).- +
rank.
lsrtinsrt, C
The normal scores are the correspondingpth percentile points from the standard normal distribution:
X:=1 NScore.=roo( Cnoro X)-. (p).
U 0
ýr-.
V1 Tech Eval A2152754 E09 5heet No.
13 ot 20 Upper and Lower Confidence Values The Upper and Lower confidence values are calculated based on.05 degree of confidence.'a"
.No DataCells length(Cells 06)
Tat:: q{ (I - 1),,No Dat-aCell]
Tcz = 1.968 G06 actu Lower 95%Con := p06 actual-Ta 0
JNo DataCells Upper 9 5%Con :=ý906actua+Ta a ctual I
/~
aael Lower 95%Con =95454 Upper 95%Con = 971.025 These values represent a range on the calculated mean In which there is 95% confidence.
Graphical Representation Distribution of the "Cells" data points are sorted in 1/2 standard deviation Increments (bins) within +/-3 standard deviations 0
Bins := Make bins(ii06 actual- 006 actual)
Distribution := hist(Bins, Cells o6)
The mid points of the Bins are calculated Distribution =
a 13 12 18 49 80 74 23.
4 k:=O.. 11 Midpointsk.- (Binsk.-+ Binsk+1,)
2 The Mathcad function pnorm calculates a portion of normal distribution curve based on a given mean and standard deviation normal curve, = pnorm(Bins,, p06 actual, o06 actual) normal curvek phonm(Binsk 1.,,
po6 actualo0 6 actual), pno**
).
ins k*p06 actual, 006 actual) normlal curve~zNo DataCellsflOrmal curve
Tech Eval A2.152754 E09
" Attachment 3 oneez o4o.
14 of 20 Results For Trench 17 2006 The following schematic shows: the the distribution of the samples, the normal curve based on the actual mean and standard deviation, the kurtosis, the skewness, the number of data points, and the the lower and upper 95% confidence values. Below is the Normal Plot for the data.
Data Distribution Distribution nonral cuv minpoint:= 702 Standard error:? 4.184 Skewness = -1.252 Kurtosis = 1.587 rnpoint = 702 C
700 80 900 1000 1100 Midpoints. Midpoints 1200 IP06 actua = 962.79 Lower 95%Con = 954.554 a
69a 0 6 actuat= 71.259 Upper 95%Con = 971.025 A Kurtosis value which is less than +/- 1.0 and approaches 0 is indicative of a normal distrubution. Therefore this distribution may not be completely normal. The data is skewed towards the right.
Normal Probability Plot 3,
I N-S... rej xxx x xx C
I I
I SI I
700
.750 800 850 9O0 950 1000 1050 1100 A Normal Probability Plot indicates the distrubution of this data is not completely normal
Tech EAal A2152754 109 bneet NO.
151of 20
.3 Review of the 2006 data shows that the first 49 point grid located at the top of the trench is much thinner than the remaining five 49 point grids lower in the trenchs The mean of the top grid is mean(Grid Top2006) = 845.128 While the mean of the remaining five grids are:
p6 grid.actual° :=m..(ard 2) mean(Grid 2)= 972.5.8 p6 6 rd~actual := mean(Grid 3)
.mcan(Grid
- 3) =999 3
.75 P0 6 grid.actua 2 Iean(Grid 4) iV06 grid.actual3 mean(Grid 5) g06 grid.actual4 =mean(Grid 6).
rnean(Grid 4) = 996.51 mnean( Grid 5 ) )=993.916 mean(Grid 6) =965.1 02 0
mean(li06 grid.actual) = 985.552 Therefore the distibutelon of each of these set of data were investigated. The follwoing creates an array of the lower 5 grids five Cells stack(Grid 3, Grid 2) five Cells = stack(five Cells. Grid 4) five Cells stack (five Cells. Grid 5 )
five Cells stack(five Cells, Grid 6 )
No DataCells :length (five Cells)
No DataCells = 243
Tech Eval A2152754 E09 Sheet No.
16 of 20 Mean and Standard Deviation
/ P 5grids.actual := mean(five Cels:
a 5gids.ac5ual Stdev (fiv*
ells) 9 5grids.actual ý 985.54.73 4 462
.JI giU..adtUil Standard Error.
Standard error =
5grids.actual No Daa s
Standard error = 2.66 Skewness S
(No DataCels)I(rVe Cells 5-grids.actuao
)
3-Skewness (Nb DataCells-1) (No DataCells-2).(0 5grids.actual).
Skewness =-0.242 Kurtosls
- 4 Kurtosis:="
NO DataCells'(No DataCeIls4-I)'(five Cells*
I 5grids.actual)
(No DataCells-1)(No DataCel.- 2). (No DataCeli-3).(
grids.actual) 4 Kurtosis -0.082 3(NO DataCells 1)2 (No DataCells - 2) *(No DataCells - 3)
f,neet rlo.
Tech Eval A2152754 E09 17 of 20 Normal Probability Plot In a normal plot, each data value is plotted against what its value would be if it actually came from a normal distribution. The expected normal values, called normal scores, and can be estimated by first calculating the rank scores of the sorted data.
j :=0.. last(rive Cells) srit :=sort(fivecels)
Then each data point Is ranked. The array rank captures these ranks 1(srt~srt) i -z
.rank Xsrtz:Srt.
rank rows(five Cells) + I The normal scores are the corresponding'pth percentile points from the standard normal distribution:
x:= I NScore. :-roocnorm (x) - (p), x IR
sneet No.
Tech val A2152754 E09 181of 20 OWNUpper and Lower Confidence Values The Upper and Lower confidence values are calculated based on.05 degree of confidence 'a NO Datalells length(five Cells)
No ateCells 243 a :=.05 Ta :=
( -. ),No I52taCell Ta =,1.97 u 5g'ids.actual Lower 95%Con :=j 5grids.actual-Ta, Lower 95*Con 980,308
- /oDataCells Upp er9 Toon,:
AS a
c06 ictual Upperg95%Con,::l S grids.actua + Ta./oUpr9 Cn=9455 ND e
Upper 95%Con 994.552 These values represent a range on the calculated mean in which there is 95% confidence.
Graphical Representation Distribution of the "Cells' data points are sorted in 1/2 standard deviation increments (bins) within +/- 3 standau deviations 2
Bins' Mak bins(I' Sgrids.actual* 0 5grids.actual) 25 Distribution := hist(Bins, five Cells) 32 Distribution 47 The mid points of the Bins are calculated l
l
'42.
k := 0."ll
- l.
11Bins,,+
Binsk+
9
.Midpointsk 2
3 The Mathcad function pnorm calculates a portion of normal distribution curve based on a given mean and standard deviation OI'rml curve0 -pnor5(Bi. 1 gl Sids.actual' 0 5grids.actuam) no*rial Urve pnorm(Bins,
' A 5grids.actual' C1 grids.actual)
Pnorm(BiJsku, Sgrids.acdual' 5grids.'actual) nonral curve Ix No DataCellsnormal curve
Tech Eval A2152754 E09 Sheet No.
19 of 20 Q
Results For Trehcn 17 ower 5 grids Oct. 2006 The following schematic shows: the the distribution of the samples, the normal curve based on the actual mean and standard deviation, the kurtosis, the skewness, the number of data points, and the the lower and upper 95% confidence values. Below is the Normal Plot for the data.
Data Distribution minpoint = 702 Standard error 2.66 Skewness = -0.242 Kurtosis = -0.682 Distribution
.1.
noffaI curve a
G A CW" nV 10 0f%
ln n I lr n Lower 95%Con = 980.308 Idpols,MidpoitUpper95%Con = 994.552 p' 5grids.actual = 985-547 Sgrids.actual = 4 1.462 A Kurtosis value which is less than +i-- 1.0 and approaches 0 is Indicative of a normal distrubution.
Normal Probability Plot NSxxex
- XXX"
-2 0
-3 850 900 950 1000 1050 HD00 stno A Normal Probability Plot indicates the distrubution of this data is not completely normal
Sheet No.
Tech Eval A2152754 E09 20 of 20 Therefore when considering the entire 2006 data (all 6 grids) set which is skewed, the corrosion rate from 1986 to 1992 was (p86 actual - 906 actual) 1992-1986 Therefore when considering the entire 2006 data (all 6 gf ids) set which is skewed, the appa'rent corrosion rate from 1986 to 2006 was (p186 actual-906 actual). 3.054 2006-1986 When considering only the 5 lower grids of the 2006 data set which is normally diptributed, the corrosion rate from 1986 to 1992 was (1186 actua-P 5grids.actual) 6.387 1992-1986 This is very consistent with the Bay 5 trench results When considering only the 5 lower grids of the 2006 data set which is normally distributed, the apparent corrosion rate from 1986 to 2006 was (986 actual-P 5grids.actual) = 1.916 2006-1986 This Is very consistent with the Bay 5 trench results
Pfrof I L
- 0 *0ý P2 I'fe3-
,nerel Electric otreek Ultrasonic Thickness Measurement kieingOofta-IR,"
Data Sheet Fil mw1;u NIA Donti]
0=2 ITT Prwedum:I Puiiiiltil 12 I
Io I
mdficitioni M=&WW4 i
of 2
I Lovet ii IIflS1TINmMTYnG Panaaric 37DL1. Plus Examiner N/A Levt:
WA. Jflstrumebt No.
03112496.
TrsanduoeT*
0798 Iefl 104012 Slw 0.20Wl F
. sL i
,A 0'
TransduarCable Type: Pa,,,rnetrcs Length; V-jCoupia't Sounda*a o
b loNo:. I Isuo Calibration Block Type: CIS Step Wedge.
Block Nwmbu CAL-STEP.00 SYSTEM CALIBRATION INSTRUMENT SET-INGS nitial CaL TCi i C
rtin Cihme
=Fil Col. 71"s M
Coa"' Rng:
5.0 115 3:0.
13:30 14:30 Coars DebT.
WA
-Calibrated Sweep Range a o0. 5W Ingcae t 1.500W gig Delay CalF; N/A to n
2464 n Vlock T
Range Callh WA W/o Number. I I2D697 Inafturumen Freqi.
N Total Crew Doze
- ?1,12/*77`Dryw91J Containmnent Vessel Thickness Examinsilot.
Gai 74, rr.
,,(f,,
4-V- F Externall.1T
,n petir-.
N/A_
Re~jecti WAI
- itr~
j i "
Bay-I.
Point S0NAY Number
]
I Vealftic Location I
Horlizonal Location 00546Q-.,07 AR# At~S O
I.PAOE4P I0
- I I-I -I-El See Attached for Locations and Thickness, Readings t -
-U-m t
r -
IV I. -
-W&ý
-l
- ' W,'
l-
- -,i
,. I-..,.
-E I.
..*;,o.*.......:.j I
I COMMENTS: Coated surrece is rough at all reading points. Unable to slide off of best measurement spot. Plot measurement numbers are more accurate If mossuting tape Is plced 13' to the right from the center of the weld on the nozzle, then folow down passing through pont# 6S.
II Reviewed br-Lee Stone Level "Dat 110/2=008
.AY.1 2006 Point Vertical Horizontal 1992 value Value Comments I D16 R27 0.720 0..710 2 D22 R17 0..716 7 0.690 3 D23 L3 0.705 0.665 S4D24 L33 0.760 0.738 RoVerRough Surface
_5D24L45 T-4 0.10
- 0.680 6 D48 R19 0,760 0731 a7
- 9.
R7 0.700 0.669 8 D48 RO 0.806 0.783...
9 D36 8
0.805 " 0.754 10 D16 R23 0.839 0.824 11 D23' R12 " 7 0.714 '0.711 a202 L_______
S 0.724 0.722 13 D24 "
- L40 0.792....
0.719 14 D2 R35 1.147 1.157 15 D8 L51
.1.156 1160 16a 050 R40 0.796 0.795...
17 D40 RI6 0.860 0.84 183.
L2 0.917 0.899 19 D38 L24 0.890.
0.865 20 D18:
R13
-57 0.912 21 D24 R15 0.726 0712 220D32 R13
._0852 08541--
231D48 TV, 0.80O 0.8281
.Data obtained' from NOE Data Sheets 82-072-12 page 1 of I NDE Data Sheets 92-072-18 page I of I
- NDE Data Sheets 92-072-19 page 1 of I All horizonal measurements taken 13" to the'right of the centedine of the reinforcement rng (Boss).
All vertical measurements taken frm bottom.fvent nozze at the 3T reference I*nem.
SurfaCe roughness prohibted dt of al reidn~t Note: Per discussion with Engineering, single point readngs were taken In leu of 6, baed on surface curvature.
N ft6
-v
0- 02
'P u -
3eneral Elect" Dyster Creek Bfuelino Ouae 11R21 I
Ultrasonic Thickness Measuremeni Data Sheet Fl FeNamc.I WA uT Pfrocedurs E-W38-0 Svpecificatlonl IS-328227-04 M. 12
- *u*,
- f.
2 7
Examiner.
NIAo Levet.
NIA.
instrumentNo:
=3120'701 TransducrType:
D790M
-Tid-ai.-
33B=
sic 0.26ir Fre
" 7.5 Kh
,vb Ir" Traensducer Cable Tylpe: Panginetrcs Lengfth V
jcplant:
Soundsals' Batch No:
19620 Calibration Block Type: CIS Step Wedge Block Numbe.
CAL-STEP-13B SYSTEM CALIBRATION INSTRUMENTSETlINGS InHt l CaL'l.flt Calibration Chede
=.
Final CaL. TIm Coarse Range:
20 22:05 WNA N/A 23:60 Coarse Delay.,
N/A Calibrated Sweep Range-.
0.500r Indies to 1.500" IndeS DmeIa y
avy.b N/WA Thermorneteci 246847 Conmp. Tep 71r Stlodc TkY7 Range Calib WA W/O Number.A C20134Tt Jnsrumnent Freq.
NZA Total Crew DQ.8 Drywell Containment Vessel Thickm Exminatloge SGain:
54db d1 j*
Ens.ctreas.
I Danpft:
N/A Reject'NAA I
~Bay -3 I
BAY I -
~to m~
02 -
-I -
Vfi.
COMMENTS: N/A Reviewed by: Lee Stone Leval il Date 10/19)2006
w, W.-
BAY 3
,.2006...
Point Vertical Horizontal 1992 value Value Comments I D16 R63
- 0.795 0.795
- 71A 2 D18 R48 1
0.999 3017-R33 0.857 0.850 D13 L5 0.898; 0.903 5D25 L8 0.823 0.819 6 D15 L56 0.968 0,972 7.029 R4 0.826 0.816 I_"_-I034 I
L4 10.78 0,764 iI Data obtained from NDE Data Sheets 92-072-14 page I of I Note: Per discussion with Engineeng, single point readings %ere taken in lieu of 6, based on surface cuivature.
0 PASSPORT#
0 ASS A R * -;2-ff'"
07-tT~f
.4..
tT y
General ElectriC FieNm:
W oyster t rUltrasonic Thickness. Measuroement Daft:
102=000
,roingoutag-Imrt Data Sheet UTProce.re:d
. EMA304 Examinerf Leslie Richter Leyet Linstrrint ")M Penemebics 37DL Plus Xxami*
W/A I Levet:
NIA.lnstrurentlo 0311O241)00 Transducer Type:'/ D795 104012 She:
0.200-
.Fr ewA Transducer Cable Type: Panametrics Lengfth
-7 lCouplarint Soundsaa lBatch No:.
19620 Calibtation Block Type: C/S Step Wedge Block Number CAL-STEP-130 SYSTEM CALIBRATION INSTRUMENT SETTINGS Initial CaL. Tne Calibration Checks Final CaL Tie.
Coarse Range:
5.-0 15:38 15:51 16:45 17z rNe Delay:j
/A Calibrated Sweep Range -
0.5001 Inches to' 1.f,'.0*
Inches Delay Call:.
N/A Thermometer 246647 Tern:
Or TSloc-* jerni 7W Range Callb:
N/A W/O Number C2013477 Instrument Freq!
N/A Total Crew Doe Dryweall Containment Vesil ThIckne*s Examlnaloin 2 nT Excteal UTr fropectfens.
4m 2u-m,,m
'r,,,
DamplnWj NIA Filtrj WA Bay-5 S
p FIN w
Read[n p--
sil COMMENTS: WA Revoefe ErfckScoff Ercsw!ý ZOV Level II Date
- 10/19/2006.
Reiee ojr l1oo
It
.. 1
- 11 Ad 603 PSLU9MV #,my LO 6009PS00
- ikiOdSSVd BAY 5 2006 Point Verti'al Horizontal 1992 value Value Comments
"_'_I D38 R12 0.97 0.948 up.97 dn.97 2 D38 R7 1.04 0.955 RoughsUrfade-up.99 dn.99 3 D42 RI0 1.02 0.989 up 1.0di 1.04.
4 D41 L7 0.97 0.948 Roughýurface, also d[shed 5 D42 L11 0.89 0.88 Rough surface, 6 D47 R5 1.06 0.981 up 1.0184n.1.014 7 D48 18
,o.99 0.974 Rough surface left.99 right N/A 8 046:
L31 1.01 1.007 Rough gUrfadee..
Note: up, dn, left & right readings were taken 1/8" from recorded 2006 value~reading.
Rough surface limited taking additional readings. Reference above.
=Vertical and horizontal measurements taken from top of coating on long searn 82 to right
= Vertical and horizontal measurements taken from bottom of nozzle at 8 o'clock position Reference NDE Data Sheets-92-072-16 page 1 of I I - Reference off the weld 62" to the right of the cent6fllne of the bay; 2 The original data sheet Is not clear as to whether this point is to the dght or left of the weld.
Therefore NDE shall verify this.dlmenslon.
Note:. per discussion with E'ngineering, single point readings were taken In lieu of 8, based on-surface curvature.
(C)..
General Eledzi
-tr Creek Ultrasonic Thickness Measurement vu I R1 Data Sheet FNfi.Name:~
WA Wet: I 1W11L/2005 UT Procedum:j ERt4A-335004 Spedflcatin -IS-328227-M0-:
Exa
.. e I Lee St0e
[ lLevat II fInstrurnerOtTy_"
Panametris 37DL Plus Examiner:. N/Aj,.
IeLevat A
r NO:
031124905 Transducer TypW D795 ISeratt.
1103007 I Sizez 0.200'! Fren 5 MI*
JnL Transducer Cable TYPe: Panametrics Lengkt 1Y Couplent SOundea IBatch Nea j
Calibration Blodc Type: C/S Slep Wedge BJ lock Number:
CAL-STEP-109 SYSTEM CAUBRATIbN INSTRUMENT SETTINGS Initial Cal.
Cime Calibration Cheda Final Cal. Th.
! C o.m, R a*ng :
5.0 14:
N/A I/A I
Coarme De*ay.
WA Ccalibmted Sweep Range a 0.5W Inches t 1.5_F.r in, Deay Callb:
Nz A "lome 24673?
.T 7?
.,o.cT 74*"
Range Caoib:
N/A W/O Number C201347"7 Instrument Freq.
NA Total Crew Dose DrywaiI Containment VesselTi*knessEamlnetatl GaIn 67 db I
Extamal UT inspcdons.
)l ampinir.,
,WA Reject:
N/A WA I
B~ay-BAY Point Number 9L We tog CIL See Attached for Locations and Thickness.
Readings
~1 I
E4 UNA-&MR
-4laý~ii 4-S.
- .1~
...~ \\
£. 's-
- ~'
V I
OMMENTS:A' A'-.CIV IV ~eAAT1~~r7O2LO Reviewed byKmel et*j ZjJ Level If Daft 10119/2008
BAY 7 2006
_ Point Vertical Horizontal 1992 value Value Comments ID21 R39 0:92 N/A Could not locate area D21 R32 1.016 NIA Could not locate area 3 010 R20 0.984 0.964 uLdn-ranged from 0.956.to 0.980 4 D10 RIO 1,04 1.04 N'A
.5 D21 L6 1.03 1.003 UPdn ranged from 1.000 to 1.049 6D10 L23 1.045 1.023_up/dn rangedfrom 1,020to I.052
'7 D21 L12 1
1.003 upLdn ranged ftom 1.002 t6o1.026 Data obtained from' NDE Data Sheets 92-072-20 page 1 of I Note: up, dn readingsewere taken 1/80 from recorded 2006 value reading.
PASSPORT#
0054604 07 AR# A2152754 E0 A"TACHMENT PAGE2O 7F&9 t.M X
- I.
/i~Itj(-OG4, X
I~yc e!-
Ultrasonic Thickness Measurement Onuae.- 1*R21 Data Sheet F ile Name:
W UT' Procaqdur:
ER P 33500 Spefcta~
M832=27-M0 Excaminer.
Scott Erdisofl Level:
II InantumentT
- Panamet*ca 37DL Plus ITa=-JW. NI
.~o s=*v*.
WA.jisruwi
- o.
ft F
' -. M 031274 rTrnsducer Cable Type: Panameirlca Length."
Coupla:nt Soundsafe Batch Nm 19620 Cardbaion Bl Type: CIS Step Wedge Blkock Numb.s CAL-STEP-0W SYSTEM CAUBRATION INSTRUMENT SET INGS Initial CaL. h
.Calibration Cheft Fia Col.
oks Coarse Range:
2*r' 22:05 NI *_"
I
_WA 2:50 Coarse Delay.
N/A Calibrated Sweep Range a 0.50W Iniches to 1.500' Ind=e Delay CaGlb:
NiA Thermomete.
246737 I
Comp. Temlp
?e Block Tei Rang WA WJO Numbs 1 C2013477 Instrument Freq.
N/A Total Crew Dose ywelI Containment Veseol Thickness Examlnailon Gan 61d*b.
6K j,
Exteramil UT Inspecta*om.
0
.3 Dainplng WlA Rejeal I WA I
Bay-9
ý.Li
ý.IýUA Point p
BAY See Attached for Locations and ThIckness Readings Thickn~
Readbni IL
. t m
__cc j Lw N M-2 a,..
I COMMENTS: WA Reviewed by: Lee Stone
- 4.
Level I
Dato 10/19)2008
K....
BAY 9 2006 Point Vertical Horizontal I992 value Value Comments 1D29 R32 0.96 0.96.
2 D18 R17 0.94 0.934 D320
.R8 0.994 0.989.
4D27 R15 1.,2 1.016
- 5035, L5 0
.09851 0.964:_
6013 L30 0
082 0802_
7016."
L35 0;.825 0.82 8 D21 0.791 0.781 09 20 L53 0.832 0.823 10 030 L8 0.98 0.958
-i-*
Data obtained from NOE Data Sheets 92-072-22 page 1 Of I Note: per discussion. with Enginering, single point readings were taken in lieu of 6, based on surface curvature 00546049 07 AN* A21527544 Eft ATTACHFAE~r
~ I PAGE Leop 0A F%01 -O
I~ (cF.~.
Gedneral Elecftu File Namef WA terCiwek Ultrasonic Thickness Measuremen Dale:
iawnw0 I Outs Data Sheet U Pocdr:,
O-4
?8931 2Specfflcn Mon MM4 Ltxemlner Graa Mcab teveh
- ýInrmeat TY Panametrics37[X lus Examiner.
N Level NA Instniment No:
t03112490 Transducer Type:.
D795 ISerialit 104010 S~ce C0.2 I Fre 5Mhz 1 Angqbc 0*
Transduoer Cable Type: PanametdcD Length 5'
Couplant" Soundsab Batch No :
CalibratIon Block Type: C/S Step Wedge Block Nunber.
CALJ-STEP-080 SYSTEM CAUBRATION INSTRUMENT SEfliNGS Initial CaL "inem Calibration Checks I
FInal'CaL Time Coarse Range:
5.O 2:15 N/A N/A 5:1:
Coarse Delay;.
WA Calitrated Sweep Range =
0.500(
Inches to 1.5W Inche.
Deliby c,1b *N/A Themornet'r 246534 Comp.Tw 740 BIodkTx 7r.
Range Cafib:
W/A W/O Number.
C20134177.
Instrument Freq.
WA Total Crw Dose Drywell Containment Vessd Thickne Examinadton.
cain!:
58 i..
,,xmrEternal UTr hipecdom I'
'I Damping:
Re~ect4 WA Filterl W
Bay-11.
SAY Point Number Vertcal Location See Attached for Locations and Thickness Readings
.- ~:
i dg I..
COMMENTS: N/A Reviewed b". Scott Erickson Level Nl Date 10/20/2006
BAY 11 I
2006 Point Vertical Horizontal 1992 value Value Comments I-IB ID20.
R29
.0.705 0.700
.f A 2 D25 R32 0.77 0.760 3 021 L4 0.832 0.830 4 D24 LB6 0.755 0.751 S5 D32 L14 0.831 0.823 D27 L2 0.8 0.756 7 D31 R20 0.831 0.817
_8 D40 R13 10.85 0.825
__....1-_-
Data obtained from NDE Data Sheets 92-072-10 page 1 of I Note: per discussion with Engineedng,:single point readings were taken in lieu of 6, based on surface curvature.,
-Z-CrP I
~PASSPostvj f7 OOU649o 07 LAYACHMENT N.
0
Oyter cC-rk Ultrasonic Thickness Measurement u;-
g
, ou Ge-1l.1 Data Sheet Pama I f
12" Fil~ae1 HA.
DO. 81 IMI 12006 UT Prcedure.I AA4"35-004
$PeCfflc:t6on IS-32&22-036
,iwminr. Scoft Efickson Leve 11 IlmtneflT Panam 37DL Ph=
Examlner N/.A Levet N/A lnnstmnert NO:
031120706..
TransducerTypP:
D799 Serialt.
104044 Size 0.31r F
5Mhz A h a
TrnnsducmI Cable Type: Penanmeics Lesngth 9l Couplant Soundsa Batdh.N 1
041208 Calibration BIodiType: CIS Step Wedge" Bfock Numwb.
CAL-STEP-109 SYSTEM CAUBRATIOM INSTRUMENT SETTINGS 'nitial CaL "rn
"=. Callbatilon Chedos Final CaL t'ne.
Coarfe Range:
5.0" 3.00 N/A N/A 4:15 Coaoe Delay.
NA Calibrated. Sweep Range =
50r Inches to 1.50" invd Delay
'aft WA h"lz.6..
24673' Co,,,p.Tr,,r7
.. Bl
'Tej, 0"
Ratne Caib:
WA WJO Number.
C2013477 irstrument Freq.,
NA Total Crow Dose
. DrgIU Containment Vessl Thicknese Examnautin..
-Gain 51' Ip I
.Exlenul UT npwO-a.
IRa*dnb I A.
7ruTe NIA IB4y-.13. 1 Tb~ckiaiORedn COMMENTS: W
'A Reviewed by: Lee Slone,..
Level II Date 10119/2001
BAY 13 2006 Point Vertical Horizontal 1992valu Value Comments_
I U1 R45 0.672 NIA Could nrot'1ocate area 2 U1 R38 0729 N/A Could not-locate area S3 021' R48.
0.941 0.923 40D12 R36 0.915 0.873....
5 D21 R8 0.718 0.708 6024
.8 0655 0.658 7D17 L23 0.618 0602_
8024
=20 0.718 0.704 9 D28 R41 0.024 0.915 10*028 R12 0.728 0.741
- 11 DIS L15 0.669 12 028 1.23 08...._01885__
0.8w__
D1318 040 0:932
- 014 14"018 R8 0.868 0.870 15 020 L9 0683 0.66
_m 16 D20 L29
.0,82 0.814 17 09 R38 0,807 NIA Could not locate area.
18 022
'R38.
0.825 NA CouLd not locate area 19 037.
0.9`12 0.916
- 1 Ii.
Data obtained from SNDE Data Sheets 92-072-24 page I of 2 Note: per discusso.
-M E ring, min.le poin tns were tae In lieu of 6, bamed on surace cmrature.
I-0 PASSPORT#
00546049 07 AR# A2152754 BEM ATTACHMENT PAGE.OF.OF ZT
19, aZ I L K - 19 15 10-4 1 be- -f I
Oyster Creek Ultrasonic Thickness Measuremen
- kerE D ata Sheet easDeaent1 File-Name:
NA oate:j lO2io2aflO UfT Procdure:j ERMA4335004 Specification i IS-WSW2 004 Examinwecm att Wilson eI Lvet 11 InsmritTmpeT Paneretik-s 37DL Mm, lEmminern*
NIA lLevet:
Z.isrrnef if 031124700 TransducerT W
D795 Ise
,al.
11030
,I0 Size:
0.200 r
5,h2 An e:
Transducer Cable Type: Panametrcs tength 59
" Couplart S un5 a-Batch No:
19620 Calibration Blodc Type: C/S Step Wedge.
Block Number:
CAL-,1P-0 SYSTEM CALIBRATION INSTRUMENT SE*I"NGS Irniial CaL Trim CalJbration Chdl*i I
Final CoL Time Coarse Range:
5 10&30 12:10 T
12:33 13:05 Coarse Delay' NIA Calibrated Sweep Range a 0.500(
Inches 150 Inche Delay Ca b:
N/A.
rmor ri'etr 246484 CornP 'te=F " aT" Ielockt eM 7W A angre C a,io:. W A W /O Numbn.
C2013477 I
Instnnnt Freq.
N/
Total Cr.
Drwe Conbinmni Vnaal Thickn es Examination.
.I 2
.i.
Extrnal UT n
-Damping:
I WA
.Raetjed WA t
I Bay -16 I I I
N/A Filter Rendlna
-4
_*I
-*1 I*I IL COMMENTS: N/A R evivewed byLee Slone J i i~.Level 11 Date 10/20/2006
V.
AIM BAY -15 2006 Point Vertical Horizontal 1992 value Value Comments I-1D12 R26....
0.786.
0.77910.711 to 0.779
.2 D22 R21 0.829 0.798 0.777 to 0.798-3 D33.
R17 0.932, 0.935 4 D30 R7 0,795 0.791 5 D26 L3 0.85 0,855 0.817'to 0.855 606 L8 0.794 0.787.0.715 to 0.787 D7D26 L18
.0808 0.805 l8 D820 L36l 0.77 0.760 l 9 D36 L44 1-0.722 0.749 0.720 to 0.749 10 F24 V480.
0.852 0.837 to 0.852 11 D24 L65 0 825 0.843 0.798 to 0.843 0
l Data obtained from NDE Data Sheets. 92-072-21 page 1 of 1 Note: scanned 0.25u areaaro~und recorded 2006 value number - see comments for ranges.
PASSPORTV 00540049 07 AR# A2152754 EOS ATTACHMENT PAGE ýk OF 2-4 0
U
-I' r
C r
f~faFZ.
021
.Gnehral Electi I
fer C6reek efu e
Z !ýngOutap-1IR21 Ultrasonic Thickness Measuremeni Data Sheet Fil Hrrs:
WA ISpecdLation IS-328W2-004 IIa,-miner.
MatWAfson Level:
U instnsment TypL Panameltrcs 37DL Plus Exam N
I Levet
,WUA lnstr*umntNC 03112470" transducerTyp1, D795 SeriallY 104010 1 Sze:
0.200o Frema:
5Mh Angle: 0 Transducer Cable Type: Pangiehics Length 5"
Couplart Soundsafe Batch Na:
19620 Calibration Bod" Type: C/SStepWedge Blo*c Numbe.
CAL-.sMP-.08 SYS-TEM CALIBRATION INSTRUMENT SETTINGS itiaCal. Time 1 Caflbration Chedcs Final-Cal. T ime Coarse R.nge:
50 15:38 N/A N/A 17:18 Coarse Delay.
N/A Calibrated Sweep Range.
0.50a Inches to 1.5000 Inches
- Delay Ca~lb:
NIA Thermometer 246534 Comp. Tenp 82 lBklod
&Y 778-p Range Callb:
N WA W/O Number C2013477 Inern~ent Freq.
Wa A
Total Crew Dose.
Drywall Containment V lmns Thkl.kU 9.
- nallo,
- " _.i 6 7 d b E.,te r n l U T n.s e -l o,..
l.!
I!
Damping:
NIA RFjec4 WA]
Filter.[
WA I
Bay -17.I f
point Vertical Hortzonal I
Location MO.
ThIcknesa]
L-oai I
I a
I
-I q -
a I
ad I
I -~~--------~-
I
-I See Attached for Locations and Thickness Readings A
Ie 411
.1 COMMENTS: N/A Reviewed by* Scott Erickson Level N
Date 10/19/2006
LAZ~
~
N 603 09SA;IW #UV LJOdSSV09W BAY 17
)
r ~~Noe Me'--"
ee*f "vent fl*6...
-a-Tt'-"..... *-:0--
Point Vertical Horizontal 1992 value Value Comments 1 D12 R50 0.916 0.909 2 D9
- R40 1.150 0.681 Up.705 dn.663 3 D16 R26 0.898 0.894 n
i 4034 --
R24 0.951 0.963
,5 D6 R20 0.913 0.822 6 D17 R7 0.992 0.909 7D18 L14 0.970 0.970 8 D34 L46 0.990 0.960 9D21 L29 0.720 0970
____10 D3 L2 0.830
.0.844 11 N/A "N/A NIA N/A
-si-Note: Down measurements taken from bottom of boss which is 18" below vent line.
Locations 8,9, & 3 look to be un-prepped flat areas of the original surface.
All left, right measurements taken from 8" left of liner long seam Data obtained from NDE Data Sheets 92-072-08 page 1 of I Note: Per discussion with Engineetng, single point readings were taken In lieu of 6, based 0oqsurface curVature.
.4
1*~~
g.FI.
020 General ElecIAC r Creekc Ultrasonic Thickness Measurement fue Ong Wage - 1I2 Data Sheet M
Date:
10I22,2006 UT ftc W
ER-AA-*%3"00 UT Procedure:
I spedfic*
l842B27-04 P u.M
.I
, I-of.
"2 A,
Lis""
Examinerw MOB Wilson Levet 11 InsumeitTy Parnaebica 37DL Plus Examiner WA""
Level:
H/A. 1lr~triment RI 031124709 Tra n d u e r T y *
' D 7 9 5 S e ria l
- 1s0 0.S z :
0 2 0 "
..~ ¢ M h n l :
TL ucer Cable Type: PinametrIcs Lengft 5V Couplant Soundtsae 1BatchN=I 1V)20 calibration Blodc Type: CIS Step Wedge..
Block Nuibw.
CAL-STEP-0aR
_SYSTEM CALIBRATION INSTRUMENT SE'TfNGS Intial Cal. Tmwe Caibamfion Checkd FinalCalTr-Coarse Range:
5.0" 14:20 15:36 1
NIA 16.09 Coarse Delay.
NIA.
Calibrated Sweep Rangea 0.500" Ides to 1.500"._In_
Delay Cib:
NIA Thewmo etr.
246634 o S
T-.
Range Cailb:
N/A W/O Numfber 2Q!!k Instrument Freq.
N/A Total Crew Dose k>0=3 Te D.ywsll ContlamnntVesmsl ThIckrnaE. FmiaUnd o..
Z*
Extena.1 UI' lr~pectl6
- Galn, 67 db i
I -
U Damplng:
N/A Reject_ WA Bay -19 Print
~
Vertical HoitionuldTicns BAY Numbe Locatonw:
Location m
I',
See Attached for Locations and Thickness
-6 ReadingsC4M
- L It COMMENT: W/A Revtewed bheLee Stone L
i nLevel 11 Date I01 00
)
I
0 w
9 BAY 19
" --2 0 0 6...
Point Vertical Horizontal 1992 value Value Comments
_1 030 R60 0.932 0.904 up 897 dn.1867
____2 D52 R58 0.924 0.921 uM.850 dn.907 3 D33 R40_.
0;955
.0.932 up.894 dn.905 4 032 "RI 0.94 N/A Could not locate area 5 031 R3
.0.95 0.932 U.883 dn.897 6 052 L65 -
0.86 N/A Could not locate area 7 054 LIO 0.969 0.891 U.821_dn.912 8 D16 R64 0.793/0.953 -
0.745 up.721 dn.747:
9018 R12..
776 _ 0.780oup.728 dn745 10 019 RO 0.79 0.791 up.736dn.846 11 20D LI.8 N/A 0.738 up.738 dn.712 m
Data obtained from NDE. Data Sheets 92-072-05 page I of 1 NDE Data Sheets 92-072-07 page I of 1 Note: Per discussion with Engineering, single point readings were taken in lieu of 6, based on surface curvature.
- This value is not-dear form the original datasheet'-NDE to verify this value.:
Note: per discussion with Engineering, sing[*,
=et4adslas were taKeb. 1. fieu of 6, based on surface curvature.
PASSPORT#
00546049 07 AR# A2152754 E0 JJJ~
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j-.36174 E09 Vormdol y
Pol6 VethZ Uunrlr Under iaDe 206 Vis Corrosion Rd*
Role Ude Cormo Rate In RayPai Vetial9b.
Wt beet L
2006 flro above Wtkd Area Comte We-dd Arto I
6 D O,6 RI
"*Ya 0.76 11.111.2-022 0.731
.2.0"7 2.j07 7
D39 I5 Yes Ya 0.7 IR21L.3.022 0.669 2.214 2214 1
8 048 3R0 Yt '
Yes 0.5 IR21LR.O22 0.793 1.571 1.57"
- 9 03 L
U8 Yes a0.m0 tR2JLR.-22
.5.754 3,643
- .A43 16 D50 R40 Vet Ya 0.796 1R299LR.022 07N95 0'ow 0071 1
17 D48 3RI6 es Yes 0.86 IR21R..022 0.846 law00
.I0 1 99 D38
.2 yet 0.917 IR21LR-022
.0399 1.286 1.2%6 319 38 L."4 Y"
0.99
- 32I9R902Z W365 19.766
.76 1
22 032 R,,
"a 0.Ye U2 IR2IL,.0o2 o04
-0.143 1'
I 23
.48 8is Tm
'i.
0.o3 JR312..022 0328
,571 1571 mCm)
IM i u 612
!y=
M a97 13291L.3019 0348 9.171 1371 ai 5
2 D42
- 3*1 Yes;
.M I.04 I2 L.R-0 19 0.955 6,79 6.071 0.4 bDW 5
3 Y44 3,oIA Ta a
.0 921
,19 0,"n
.2'"4 22.94 4W19 u
5
. 4 044
.AJ 1l'2 Yes Yes 0.97 IR21LR.099 0.946 1
937 1371
)5 5
4f es Tes T
0.9 o,21I.3499 0m 0.714 0.794 65 LA Yes Yes 1A06 IR211.3.019 0.981
.643 5.643 13 7
04 L1.24 Yes Yet 0.99 IR.34,.019
- 14) 1.143
.5 SY Y
ITa.
RL349 937 0214 0214 C9 5
D36 LA Yes 0.9.
928M5.2 pw 1 0.964 985 Ism 1,450 yes Yes 0.7 92402.22 Po 1"
0.781 0714 0.714 19 5
032 LU4 Tas 0331 57."101*
1eI 0223 0579 03771 6 6 D27 Yes22 Ta
- 0.
92.472.10 p9M 9 0.756 3.J43 U.43 7
A31 RTa 0y3e 927'2.90 Iz i 07 U17 1=0 J.0 I1 8
040
- 13 "a
OM 92o.o2.lo'pw 032*
1.766.
1.766
- 13.
9 021 341 Yes 034 9M-1224 pW 1 0995 0343.
0.643 4P iS poepI
,4mamms6 Updar,,de Ud-NDDa CarodooRae Rate tVar Cwrrudo Rat* b
- B a y P ol e Y a do d H a t a W ell e 1 M V A N h ' } B **
¥ l Wo*etted
.1 6.106 fMoara ahove Wetted Am WcUod Ans 13 10 02 112 Ya 0.7 92-on.Z4 p1op 1 0741 0.929; 13 II o2n LIs yes O.A 92-7z.224 pI 1
.143 1.143 IS 3
D33 R37 "Ye 0.32 IR2)LR-.05 0935
_0.214 15 5
D26 U,
ets o2 iRt2LR4-oS 0.85"
.0-357 1S 9
'D36 LAD 0.722 I21LA1o5 0.749
-1.1 17 3
D32 R28 yes n98 JR21LR421 0*. s 28
.17 4
'52 R2 yes Ytg 0.91 tRZLR-.021 0$63
-.057 17 5
D36 3L2 0.913 IR21LX-021 0322 6.5W0
'.50 17 6
052
.5 Yu Y.
A I
0.9090 I.929 SAP 17 7.26 0.97 '
22
- z-241 0.97 am00 17 8
052
,40 Yes-ye 019 121U.R021 0a 1.143 2.143
- 0.000.
19 2
D52 366.
Ye YeT 0.924 332"1.-20 0.921 0.214 0214
.19 3
D33 49 yes 0.5-5 3I21.R o
0.932 I.43 3.43 19 4
D32 Ri Vu 0.94
'O21L.3.a20
?4Lamý d 19 5
053 2
- Yc Yes 0.95 IR2.1
-20 0,932 1,2,6 1286
.19 6
052-LAS Ya YO*
036 IP2)LR-020 NOR LoaCK 19 7
039 Li2 Ya Yas 06 13211.-010 0o91
. 5371 5..73 Pap 2 O'
vh coca Nh Miniu Rate Maximum Rate Averge Rate MinkurM TMidm Rwmde In 2006 AmamngS a masum romkw nem dU F,GrY mad ma uncealait at 0mb thme O*t localsm W thi to th felu a 200 0.286 6.500 2.393 0.071 6.071 2,334 Anumlag a Aenge corrud= rate of2.3 WPY and an wua~c*faul d 20 mils the 0M9 kudosq wMt jhin to Mei follwin in 2001 U36
@344
4EIbE~iO2&~
- 1
- 2.
I General Elecc tOyster Creek R Ieport Numberl u1siuL-I U Ultrasonic Thickness MeasurementE Datel.
I&M2"10 m
B m
'RpruaniM outaae-1IR21 I
Data Sheet LZPrbeurl E4LiM-pftf2 1 1 T1 V -Sweltcatlon:l 15.32822704
'A F-xamlner.
Leslie Richter I>~I~"--
Lev*t
- l 11 IlnntrumeMtTvna Pmnnmebtics 37DL PIus 9
IInstrurnentTvnw Penarnetri 37DL Phn Examiner WA L
w I Level N/A llnsrumneht No:
.031125409 Transducr Tvda:
rl'Jv ISetlal t fl7~A1 I Size:
0.438 I Free:
5 Mhz I.,Anale'. O" ransduw Cable Type: Panarmetrics Length V.
iCouplant SountdsafS 16atch Nw.
19620 Calibration Blodc Type:.C/S Step Wedge Block Number.
CAL-STEP-136
___SYSTEM CALIBRATION.
KINSTRUMENT SETTINGS Initial CaL TimCa.ibren meek*
Final CaL Tine Coarse Range:
2.0 9:20 9:35 9:38 10:00 Coarse Delyr NWA Calibrated Sweep Range =
oW...
Inches to 1.500o-Indies Delay Cab;.
NIA IThemometer 246647 Comp. TempT Sr 7Btock.Temp 65" Range CaWb N/A W/O Nnber:
C,2,44 1 Cal0 O13 7-4.
lnstnjmen~req.
WA Total Crew Dose
- =
-V Dryweil Con taInhnent Vessel ThickesEaiain c*:"5 dt)I SFn Intrnal Ur In,*-cds.
Oamph.
NIA*
Reject MIA Trench I Bay 5 Extended Grid Data F.Aer.
The I
T transducer was positioned in the same Location orientation at each grid point.
_________Area a ztande deeper Into Trench Location ID Trench I Bay 6
Elev.
103"'
6 1.182 1.145 1.088 1.085 1.088 1.083.
1.060 6
5
.1.142 1.106 1.070 1.105 1.094 1.077 1.084 4
1.147
-1.070 1.083 1.085 1.125 1.087 1.059 4
3
- 161
. 1.133 1.131 1.127 1.094 1.060 1.052 3
2 1.165
.1.152 1.148 1.138 1.1301-1.113 1.096
-2 1
1.151 1.142 1.142 1.125 1.144 1.138 1.148o1 G.
F E
D C
B A
~Tact AVG.
-"I
- 0660
- 1.1113" Min Reading
-rMax.
Reading 1.052 t.8 COMMENTS:
The removal of concrete from trench exposed six more Inches of finer. The template Was placed below previous grid location with the centerline of the top row i" +1. 1116" from previous grid bottom row. The holes Were painted on the fner using the Nx So template. readings were then taken with template removed.
An area approximately 14x 6r of.extended trench area was scanned 100% with the minimum reading of i.047"pnd a maximum reading of.1.150" recorded.
The 100% scan Inspecdtn was performed using a D799 (Serial 8 104141) transdicer and the grid points inspection was preformed jusing a DV 506 transducer.
V* was stamped above grid point 6D.
Rteviewedib~
Lee Stnon JL PASSPORT#
00546049 07
,AR# A2152754 E09 ATiACHMENT PAGE.L OF,a.
Si6/140
603 t9Li9 izY #MV LO 00091P9O
- .*.TAOdSS~d A!i
PASSPORT#
00546049 07 AR# A2152754 EE9 ATTACHMENT &:
- m PAGE LOF rxe,*0.
Memorandum Nuclear Asset Management # AMW2006-011
'Revision 3 Date:
November 6, 2006 To:
Howie Ray
.1=
Peter Tamburro cc:
Roman Gesior' Richard Hall-From:
Steve Leshnoff
Subject:
Final Report of the Third Party Independent Review of Oyster Creek Drywell Containment Corrosion Evaluation in Bay 5 and Bay 17 Trenches.
The purpose of this memo is to document the independent third party review (ITPR) of the Oyster Creek (OC) Drywell Containment Corrosion Evaluation in Bay 5 and Bay 17 Trenches and to provide you with the results related to that review. The review was performed in accordance with Training & Reference Material (T&RM)
HU-AA-1212, Revision 1, Technical Task Risk/Rigor Assessment, Pre-job Brief, Independent Third Party Review, and Post-Job Brief.
Purpose of the Review Ultrasonic Testing (UT) measurements of the drywell thickness at and below the interior floor at the elevation of the sand bed were obtained during OC. 1 R21 Refueling Outage. The intent was to complete the assessment of the potential for on-going corrosion both above and belowthe drywell floor. The purpose of this review is to establish that the appropriate statistical methods were used to evaluate the data and that the correct conclusions were drawn from the statistical evaluation of the' data.
Scope of Review I performed a detailed review of the statistical methods that were used In the evaluation of the UT measurements. The evaluation included the following steps,.
each of which was reviewed:
e Establish that'the UT data from a measurement template was normally distributed using the kurtosis tests
- Derive the standard deviation and standard error for each of the data distributions 9 Derivation of the 95% confidence intervals for the data.
Page 1 of 2
PASSPORT#
00546049 07 AR# A2152754 E09 Asset Management # AM-2006-01 1 ATErACHMENT.
Revision 2 PAGE A OF
/
/
- Determination of the lower range of the calculated mean thickness for which there is 95% confidence.
Calculation of the apparent corrosion rate on an average basis in the trench in Bay 5 and in the trench in Bay 17.
Limitations There were no limitations to this review.
Conclusions All of the statistical tests and steps were appropriate and necessary and were applied correctly. The apparent corrosion rate is minimal. Revision D to Technical Evaluation A2152754 E09 impacts only the narrative dbscription of the UT data collection activities and includes added detailed discussion in the conclusion without modification.
Revision G to Technical Evaluation A2152754 E09 concerns the data collected in the trench in Bay 17. The revision aligns the lower 5 grids of 6 grids, in a single row, taken in 2006 with the 5 grids, in one row, taken In 1986. The alignment develops two comparabie normal distributions such that a basis is established to determine an apparent average corrosion rate in the trench in Bay 17.
Comments Refer to Attachment A for technical comments and resolution to those comments on Revision G of the technical evaluation. The comments did not warrant an Issues Report.
Page 2 of 2
AM-2006-Oi I Revision 3 1 PASSPORT#
00546049 07 AR# A2152754 E09 ATTACHMENT 9L PAGE 3. OF M ATTACHMENT A REFERENCE DOCUMENT NO. /REV: OC Drywell Containment Corrosion Evaluatipn in Bay 5 and Bay 17 Trenches ACCEPTANCE OF COMMENTS RESOLUTION RESOLUTION, 1
No comments on Revision G to Technical Evaluation A2152754 E09 c:
2
.3'*
6 END_
.Leshnoff 1 1/6/06 Peter Tamburro 11/06/06I ISUBMITTED BY DATE
.RESOLVED 13Y DATE
.1 0
Page 1
A6 cf tot 4
PASS PORT&
00546049 07 I.AR#
A2152754 E09 sýer Adk QenetnSi&
S ATTACHMENT PAGE-4 OF2.
- .**..404
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oftw AMR Aý5I$4 )BOO
,...*..,O k.a "L
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ý....
41qw*.ent*...-
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-,o '.
jerwj:.itt*..o114)*.li*
h c*.cef.6(*
'-.el, atwih hi:.eo. e-Io*ts_
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Mr. F. Howie Ray. November 3, 2006 The corrosion of drywell steel surfaces in contact with gap water is expected to occur only during outages when oxygen is present. Corrosion during operation is expected to be almost nil since the drywell operates inerted and no oxygen is present to drive the corrosion reaction. During outages, shell corrosion losses in the gap are expected to be small since the exposure time is very limited and Sthe water pH is expected to be relatively high.
The expected low corrosion losses in the concrete-to-drywell gap area have been confirmed by examination of steel surfaces in the trenches which has revealed only superficial corrosion of the drywell shell.
I With the resolution of these concerns, we consider that the Technical Evaluations and attachments successfully address:
1I The structural integrity of the concrete and drywell shell, The adequacy of repairs, and the effect of the repairs on the assumptions.or inputs used for safety and other analyses, and The impacts of past water migration and current repairs on design and the licensing bases.
We also reviewed the technical bases for the Technical Evaluation and conclude that all. inputs are accurate or conservative, assumptiotns are conservative, chemical analysis results are used appropriately, and corrosion evaluations are correct and results used accurately.
Please let.me know if you have any questions about this letter.
Sincerely, J.. "E. Nestell, PhD I,
PASSPORT*
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I IB