ML20117L360
| ML20117L360 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 08/22/1996 |
| From: | Adrienne Brown, Fleck J BABCOCK & WILCOX CO. |
| To: | |
| Shared Package | |
| ML20117L357 | List: |
| References | |
| 51-1245664, 51-1245664-00, GL-95-05, GL-95-5, NUDOCS 9609130128 | |
| Download: ML20117L360 (65) | |
Text
l
+
20440-7 (12/95)
M M F R AM ATO M E TECHNOLOGIES ENGINEERING INFORMATION RECORD l
l l1
)
Document Identifier 51-1245664-00 f
Title South Texas Project Unit 1 May 19961RE06 Day Renort for Voltace-Based Renair Criterion for ODSCC at Tube Support Plates PREPARED BY:
REVIEWED BY:
Name AM Brown Name JM Fleck Signature de M ate [
76 Signatu Date_6/t2/#,
i i
fyn t l Technical Manager Statement: Initials R4c.
Reviewer is Independent.
Remarks:
The NRC Generic Letter 95-05 requires that certain information be submitted to the NRC within 90 days of l
each restart following a steam generator inspection in which the voltage-based repair criterion was applied.
This document provides the requested information including the results of the leak rate and probability of burst l
calculations as well as the voltage distributions specified in the Generic Letter.
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l 8
9609130128 960905 PDR ADOCK 05000498 Pa8e 1
of 65 i
p PDR l
i 1.0 Introduction Framatome Technologies, Inc. (FTI) has performed the qualification and justification for implementation of the voltage-based repair criterion for outside diameter stress corrosion cracking at tube support plates at Houston Lighting and Power's South Texas Project-Unit l
1.
This qualification followed the guidance provided in Generic Letter 95-05 and is documented in Reference 7.1. Implementation of the voltage-based repair criterion at South Texas Unit I has been approved by the NRC (Reference 7.6).
l The May 19961RE06 eddy current inspection was the first inspection at the South Texas Project Unit 1 (STP-1) implementing the 1.0 volt alternate repair criterion (ARC). A full length bobbin coil inspection was performed on all in-service tubes during this outage. This report provides a summary of the bobbin and RPC inspection results as they relate to the ARC l
as well as the results of the tube integrity evaluatior,.
Tubes were removed from the South Texas Unit I steam generators during the September 1993 and March 1995 outages in support of obtaining approval of an ahemate repair criterion.
Per the Generic Letter, tubes should be removed on an on-going basis. The Generic Letter l
states that an additional pulled tube specimen should be obtained at the refueling outage following accumulation of 34 effective full power months of operation or at a maximum interval of three refueling outages, whichever is less. Therefore, no tubes were required to be removed during the May 1996 outage. The examination results for the tubes removed during the previous outages confirmed that axial ODSCC is the dominant degradation mechanism. These results are documented in Reference 7.1 and are, therefore, not repeated in this report.
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Page 2 of 65 51-1245664-00
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2.0 ARC Database EPRI has developed a database containing the testing information to support the ARC for 1
ODSCC at tube support plates. The database includes burst pressure and leak rate data from pulled tubes and from model boiler specimens. The database used in conjunction with the tube integrity evaluation performed for this report is the latest available to HL&P and FTI via discussions with EPRI and Westinghouse. This database is documented in Reference 7.2.
l This database includes the data from the tubes pulled from the STP-1 steam generators in 1993 and 1995. Also, as specified in the Generic Letter, the data meeting EPRI exclusion criteria 3a,3b, or 3c were not excluded from the database and V.C. Summer tube R28C41 was included in the leak rate correlation with a leak rate of 2496 liters per hour.
From the burst and leak data in the 3/4" database, correlations between bobbin voltage and l
burst pressure, leak rate, and probability ofleakage were developed. These correlations are given by the following equations:
)
l BurstPressure(ksi) =7.78009 -3.062526
- log ( Volts)
Eq. 2-1 l
l L eakR ate (l/hr) = 10 -2.112n +3 a i 622. log (rotu)
Eq. 2-2 1
Probabilityofleakage =
Eq. 2-3
} +g 5.172 -8.670
- log (Voln) l l
l Page 3 of 65 51-1245664-00 l
3.0 EOC6 Inspection Results 3.1 Summary of Results The eddy current inspection performed at South Texas Unit I during May 1996 was the first inspection at South Texas implementing the 1.0 Volt Altemate Repair Criterion for ODSCC at Support Plates. During this outage, a full length bobbin coil inspection was performed on all in-service tubes in each steam generator.
From the bobbin inspection, a total of 1023 Distorted Support Indications (DSI's) were identified. All of these indications were located at hot leg tube support plates, i.e., no i
indications were detected at the flow distribution baffle plate (OlH) or at cold leg TSP's.
These indications were distributed among the four steam generators as shown in Table 3-1.
TABLE 3-1 Summary of1RE06 As Found Results SG-A SG-B SG-C SG-D All SG's No. Of DSI's 171 125 442 285 1023 DSI's 1.01 - 2.85 Volts 0
1 2
3 6
I DSI's >2.85 Volts 0
0 0
0 0
h Only six of the DSI's detected were greater than 1.0 volt. In accordance with the guidelines of the Generic Letter, all of the bobbin DSI's greater than 1.0 volt were inspected with RPC.
Five of these indications were at the 02H support plate in their respective steam generators.
None of these indications at 02H were confirmed with RPC. One DSI at the 09H support plate in SG-B was confirmed as a single volumetric indication (SVI) with RPC. This tube was removed from service as required by the Generic Letter. The largest bobbin DSI detected was in SG-D, Row 37, Column 32. This indication measured 1.58 volts but was not confirmed with RPC. Table 3-2 summarizes the bobbin and RPC results for the indications greater than 1.0 volt.
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l Page 4 of 65 51-1245664-00
l Table 3-2
~ Summary ofIndications Greater Than 1.0 Volt l
Bobbin Bobbin IWC S/G Row Col Location Call Volts Call B
29 87 09H + 0.12 DSI 1.44 SVI C
20 47 02H + 0.00 DSI 1.31 NDF C
38 49 02H - 0.03 DSI 1.56 NDF D
25 88 02H + 0.03 DSI 1.43 NDF D
27 73 02H + 0.00 DSI 1.47 NDF D
37 32 02H + 0.09 DSI 1.58 NDF As required by the Generic Letter, an upper voltage repair limit was calculated prior to the inspection. The upper repair limit was determined to be 2.85 volts for STP-1 and is documented in Reference 7.1. Per the Generic Letter, any tubes with support plate indications i
attributable to ODSCC which have bobbin voltages greater than the upper repair limit must be repaired. As shown in Table 3-1, however, there were no DSI's above the upper voltage repair limit.
Generic Letter 95-05 states that intersections with the following signals must be inspected with RPC: dent signals greater than 5 volts; large mixed residuals that could cause a 1.0 volt bobbin signal to be missed or misread; and interfering signals from copper deposits. During the IRE 06 inspection,61 dent signals greater than 5 volts were identified (23 in the hot leg and 38 in the cold leg). Two of the dent signals in the cold leg could not be inspected with RPC. These two tubes would not allow the passage of the RPC probe. Both of these tubes have a history of dents at these locations. Therefore, support plate degradation is assumed not to be the cause of these dents. Both of these tubes were plugged. He other 59 dents were inspected with RPC but none of these locations were confirmed as having any type of degradation. There were also three mixed residual indications identified from the bobbin inspection. These intersections were also inspected with RPC but none were confirmed.
There were no intersections identified which had interfering signals from copper deposits.
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Page 5 of 65 51-1245664-00
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The Generic Letter also states that the ARC does not apply to the flow distribution baffle plate intersections and to intersections where the tubes may potentially collapse or deform as a result of the combined postulated loss-of-coolant accident and safe shutdown carthquake loadings (e.g., intersections near the wedge supports at the upper TSP's). Therefore, all bobbin signals indicative of ODSCC which are detected at these locations must be inspected with RPC regardless of the bobbin voltage and any indications confirmed with RPC must be plugged. A finite element analysis was performed to determine the wedge locations which may potentially collapse under accident conditions. This analysis identified 124 tubes in each 1
steam generator to be excluded from the ARC. These excluded wedge locations are documented in Reference 7.1. Only one bobbin indication was detected at a wedge location.
This indication was less than 1.0 volt but was inspected with RPC due to the exclusion criteria. This indication was not confirmed with RPC and was, therefore, left in service.
j
'Ilere were no bobbin indications detected at the flow distribution baffle plate intersections.
i 3.2 Average Growth ofIndications Per the Generic Letter, the more conservative of the plant-specific average growth rate or 30,
percent per EFPY should be used in the determination of the upper voltage repair limit. The upper repair limit must be calculated prior to each outage. Although the upper voltage repair limit will not be calculated until shortly before the next inspection at South Texas-1, the average growth rates from Cycle 6 are documented in this report.
The voltage growth of the DSI's which were detected during the IRE 06 inspection was i
determined by comparing the 1RE06 data to the 1RE05 data for the same intersections. For those intersections where a call was not made during the IRE 05 inspection, the IRE 05 data was reviewed and, if possible, voltages were assigned to these intersections. In accordance with the Generic Letter, voltage growth rates were only evaluated for those intersections at which bobbin indications could be identified at both the IRE 05 and 1RE06 inspections. For this reason, the number of growth values used in the determination of the average growth rate (1018) is smaller than the total number ofindications detected during IRE 06 (1023). Tables 3-4 through 3-7 at the end of this section show all of the DSI's detected during the IRE 06 inspection as well as their corresponding voltages. These tables also show the IRE 05 l
voltages and the change in voltage from IRE 05 to IRE 06. The indications designated as
'new' in the comments field are indications which were not originally called during the 1RE05 inspection. The IRE 05 voltages listed for these indications were obtained from the re-analysis as discussed above.
Due to the uncertainties in the eddy current process, some of the growth comparisons are expected to result in decreases in voltage. Per the Generic Letter, it is appropriate to consider i
l these negative growth rates as part of the average growth rate. The use of the negative growth rates applies only when determining the upper voltage repair limit. For the determination of the growth distribution (Section 4.5) which is used in the projection of the EOC7 voltage distribution, the negative growth rates must be included as zero growth.
Page 6 of 65 51-1245664-00 n
F For the determination of the average growth rate, the growth values obtained from the actual 1RE05 and 1RE06 data were corrected for the Cycle 6 operating interval. Each growth value was divided by the cycle 6 operating interval of 1.059 EFPY so that the resulting values would be in terms ofdelta volts per EFPY. These corrected growth values were averaged and compared to the average BOC6 voltages to obtain the average percent growth per EFPY. This process yielded average growth rates of 9.6%,32.6%,4.0%, and 22.0% for A, B, C, and D steam generators, respectively. As shown, S/G B had the highest average growth (32.6%/EFPY). The average growth rate for S/G B, however, was based on a limited number of indications (125) and, therefore, is not considered to be a reliable growth rate. It is believed that, as more indications appear in S/G B, the growth rate will decrease until it is consistent with the growth rates observed in the other steam generators. The average growth of all steam generators combined was only 12.8% per EFPY which is well below the 30% per EFPY criterion. The Generic Letter specifies that the " plant-specific" average growth rate be considered when determining the upper voltage repair limit (in lieu of a " generator-specific" growth rate). Therefore, since the 12.8% average growth rate for all steam generators combined is less than the 30% per EFPY criterion, the 30% per EFPY growth rate should be i
used to calculate the upper repair limit for the next inspection. This data is summarized in l
Table 3-3.
Table 3-3 Average Growth Rates S/G Avg BOC6 Volts Avg AV/EFPY Avg %
i Growth /EFPY A
0.365 0.0350 9.6%
B 0.290 0.0946 32.6 %
C 0.344 0.0137 4.0%
D 0.310 0.0684 22.0 %
All 0.331 0.0425 12.8 %
i Page 7 of 65 51-1245664-00 1
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TABLE 3-4 SIG A DSI's DETECTED IN 1RE06 l
1996 1995 CHANGE ROW COL LOCATION
_1RE06 VOLTS _1RE05 VOLTS IN VOLTS COMMENTS 2
54 03H
+0.09 0.49 0.54
-0.05 NEW 3
108 04H
-0.03 0.18 INR N/A NEW 9
119 05H
+0.09 0.33 0.29 0.04 NEW 15 15 04H
-0.03 0.55 0.67
-0.12 16 17 03H
+ 0.06 0.18 0.08 0.1 NEW 16 26 04H
+0.06 0.17 0.38
-0.21 16 28 04H
+0.00 0.25 0.26
-0.01 16 93 02H
+0.06 0.64 0.33 0.31 17 13 02H
-0.03 0.33 0.28 0.05 NEW 17 15 04H
+0.09 0.59 0.35 0.24 NEW 17 25 04H
+0.03 0.27 0.16 0.11 NEW 17 26 04H
+0.00 0.38 0.26 0.12 NEW 17 26 05H
+0.03 0.65 0.18 0.47 NEW 17 100 03H
+ 0.06 0.53 0.68
-0.15 18 15 04H
-0.03 0.86 0.95
-0.09 l
18 24 04H
+ 0.12 0.36 0.19 0.17 NEW 18 28 04H
+0.00 0.19 0.19 0
NEW 19 21 04H
+0.06 0.23 0.2 0.03 NEW 19 92 03H
+0.09 0.53 0.54
-0.01 i
20 14 04H
+0.09 0.3 0.51
-0.21 NEW 20 24 04H
+0.00 0.43 0.45
-0.02 NEW l
20 28 02H
+0.20 0.2 0.25
-0.05 NEW l
20 28 04H
+0.06 0.35 0.3 0.05 20 30 04H
+0.09 0.2 0.2 0
NEW 20 34 05H
+0.03 0.29 0.12 0.17 NEW i
20 94 OSH
+0.09 0.32 0.6
-0.28 NEW 21 16 04H
+ 0.06 0.57 0.36 0.21 21 17 04H
+ 0.12 0.2 0.21
-0.01 NEW 21 21 02H
+0.07 0.33 0.23 0.1 NEW 21 33 02H
+0.L 0.4 0.28 0.12 NEW i
21 39 04H
-0.03 0.57 0.33 0.24 21 87 03H
+0.15 0.1P 0.19
-0.01 NEW l
22 14 04H
-0.03 0.41 0.29 0.12 NEW 22 34 02H
+0.06 0.58 0.92
-0.34
)
22 92 04H
-0.03 0.55 0.41 0.14 NEW i
22 97 04H
+0.00 0.19 0.83
-0.64 23 13 04H
+0.09 0.34 0.34 0
NEW 23 14 04H
+0.03 0.45 0.45 0
23 23 02H
+0.03 0.18 0.36
-0.18 NEW 23 23 04H
+0.06 0.55 0.77
-0.22 NEW l
23 30 02H
+0.03 0.33 0.27 0.06 i
23 91 03H
-0.03 0.15 0.13 0.02 NEW 24 15 04H
+0.03 0.43 0.16 0.27 NEW 24 86 03H
+0.03 0.34 0.43
-0.09 NEW 25 13 04H
+0.00 0.37 0.3 0.07 NEW 25 16 04H
-0.03 0.65 0.36 0.29 NEW 25 18 02H
-0.03 0.48 0.33 0.15 NEW 25 39 04H d.00 0.33 0.25 0.08 i
25 40 02H s U.03 0.33 0.3 0.03 25 48 02H
+0.12 0.29 0.3
-0.01 NEW Page 8 of 65 51-1245664-00
~
l TABLE 3-4 (Cont'd)
S/G A DSI's DETECTED IN 1RE06 1996 1995 CHANGE ROW COL LOCATION 1RE06 VOLTS 1RE05 VOLTS IN VOLTS COMMENTS 25 81 04H
+0.09 0.31 0.28 0.03 NEW 25 86 04H
+0.00 0.4 0.34 0.06 25 87 03H
+ 0.15 0.39 0.34 0.05 75 87 04H
+0.09 0.48 0.72
-0.24 NEW M
92 04H
+0.06 0.41 0.35 0.06 NEW 26 17 03H
+0.06 0.26 0.34
-0.08 NEW 26 19 02H
+0.14 0.38 0.51
-0.13 NEW 26 73 03H
+0.00 0.63 0.42 0.21 26 92 04H
+0.00 0.51 0.26 0.25 NEW 26 102 04H
+0.03 0.16 0.28
-0.12 NEW l
27 19 05H
-0.03 0.17 0.18
-0.01 NEW
)
27 22 04H
+0.03 0.52 0.33 0.19 27 22 05H
+0.03 0.33 0.26 0.07 i
27 45 04H
+0.00 0.4 0.65
-0.25 NEW 27 62 02H
+0.09 0.47 0.56
-0.09 l
27 62 03H
+0.00 0.88 0.78 0.1 NEW i
27 73 04H
-0.03 0.56 0.34 0.22 NEW l
27 85 04H
+0.06 0.18 0.14 0.04 NEW 27 86 03H
+0.03 0.19 0.22
-0.03 NEW 27 100 02H
+0.09 0.39 0.47
-0.08 NEW i
2P 14 03H
+0.03 0.92 1.05
-0.13 NEW I
28 19 03H
+0.06 0.4 0.31 0.09 NEW 28 19 OSH
+0.00 0.41 0.11 0.3 NEW l
28 22 02H
+0.00 0.85 0.61 0.24 l
28 29 04H
-0.03 0.25 0.66
-0.41 NEW l
28 58 04H
-0.12 0.51 0.22 0.29 NEW 28 64 04H
+0.09 0.65 0.78
-0.13 28 68 02H
+0.00 0.38 0.45
-0.07 NEW 28 72 03H
+0.15 0.54 0.55
-0.01 1
28 81 04H
+0.06 0.15 0.06 0.09 NEW 28 86 04H
+0.00 0.46 0.46 0
NEW 28 99 03H
+0.00 0.17 0.25
-0.08 NEW l
l 28 103 06H
+0.06 0.15 0.22
-0.07 NEW i
28 104 06H
+0.09 0.08 0.16
-0.08 NEW 29 23 03H
+ 0.12 0.21 0.31
-0.1 NEW 29 49 04H
-0.06 0.41 0.25 0.16 29 54 02H
+0.21 0.6 0.52 0.08 NEW 29 54 03H
+0.00 0.74 0.68 0.06 29 62 02H
+0.06 0.6 0.53 0.07 29 70 04H
-0.03 0.32 0.35
-0.03 NEW 29 95 02H
+0.06 0.38 0.29 0.09 NEW 29 100 03H
+0.03 0.32 0.13 0.19 NEW 29 103 04H
+0.03 0.18 0.15 0.03 NEW 29 104 04H
+0.03 0 23 0.21 0.02 NEW 30 16 03H
+0.00 0.66 0.47 0.19 NEW 30 16 04H
+0.03 0.43 0.24 0.19 NEW 30 22 04H
-0.03 0.16 0.22
-0.06 NEW 30 27 03H
+ 0.00 0.12 0.26
-0.14 NEW 30 55 02H
+0.09 0.4 0.3 0.1 NEW
]
30 55 04H
-0.15 0.58 0.19 0.39 NEW 1
l Page 9 of 65 51-1245664-00 l
i
l T/sBLE 3-4 (Cont'd)
SIG A DSI's DETECTED IN 1RE06 1996 1995 CHANGE ROW COL LOCATION 1RE06 VOLTS 1RE05 VOLTS IN VOLTS COMMENTS 30 70 04H
-0.03 0.63 0.98
-0.35 NEW 30 75 02H
-0.06 0.97 0.85 0.12 NEW 30 84 02H
+0.09 0.39 0.35 0.04 NEW 30 95 04H
+0.15 0.24 0.07 0.17 NEW 30-101 02H
+0.06 0.62 0.64
-0.02 NEW 31 17 03H
+0.18 0.63 0.26 0.37 NEW 31 17 04H
+ 0.00 0.43 0.48
-0.05 31 32 03H
+0.03 0.24 0.15 0.09 NEW 31 34 04H
+0.00 0.39 0.33 0.06 31 41 02H
+0.12 0.74 0.7 0.04 NEW 31 48 04H
+0.00 0.64 0.41 0.23 NEW 31 49 04H
+0.06 0.34 0.22 0.12 NEW 31 54 04H
+0.00 0.51 0.36 0.15 31 55 02H
+0.09 0.5 0.65
-0.15 31 72 03H
+0.03 0.64 0.54 0,1 NEW 31 73 02H
+0.06 0.41 0.23 0.13 NEW 31 91 05H
+0.09 0.34 0.2 0.14 NEW 32 15 03H
+0.00 0.47 0.34 0.13 NEW 32 19 04H
+0.00 0.6 0.3 0.3 NEW 32 25 05H
-0.03 0.19 0.11 0.08 NEW 32 28 04H
+0.00 0.1 0.31
-0.21 NEW 32 63 02H
+0.06 0.3 0.24 0.06 NEW 32 73 03H
+0.09 0.4 0.35 0.05 NEW 32 88 03H
+0.21 0.47 0.47 0
NEW 32 89 04H
+0.06 0.36 0.77
-0.41 NEW 32 92 04H
+0.00 0.42 0.22 0.2 NEW 32 101 03H
+0.06 0.24 0.24 0
NEW 33 17 04H
+0.00 0.34 0.27 0.07 33 46 04H
-0.09 0.26 0.31
-0.05 NEW 33 73 02H
-0.03 0.69 0.33 0.36 NEW 33 87 04H
+0.12 0.56 0.44 0.12 33 90 02H
+0.00 0.41 0.09 0.32 NEW 33 94 02H
+0.09 0.28 0.42
-0.14 NEW 33 94 03H
-0.03 0.59 0.53 0.06 33 104 04H
-0.03 0.22 0.15 0.07 NEW 34 18 04H
+0.06 0.26 0.62
-0.36 NEW 34 35 02H
+0.06 0.25 0.15 0.1 NEW 34 44 04H
+0.12 0.31 0.44
-0.13 NEW 34 72 02H
+0.06 0.25 0.11 0.14 NEW 34 91 04H
+0.00 0.98 0.33 0.65 NEW 34 94 04H
+0.00 0.2 0.17 0.03 NEW 35 28 03H
+0.12 0.67 0.51 0.16 NEW 35 29 03H
+0.12 0.84 0.76 0.08 35 29 04H
+0.03 0.52 0.3 0.22 NEW 35 86 03H
+0.06 0.25 0.42
-0.17 NEW 36 23 04H
+0.06 0.35 0.4
-0.05 36 41 04H
-0.03 0.37 0.45
-0.08 NEW 36 86 03H
+0.09 0.21 0.3
-009 NEW 36 93 02H
+0.06 0.4 0.19 0 21 NEW 36 95 02H
+0.03 0.59 0.63
-0.04 NEW Page 10 of 65 51-1245664-00
i j
TABLE 3-4 (Cont'd)
SIG A DSI's DETECTED IN 1RE06 1996 1995 CHANGE ROW COL LOCATION 1RE06 VOLTS 1RE05 VOLTS IN VOLTS COMMENTS I
37 54 03H
+0.03 0.54 0.42 0.12 NEW l
37 58 04H
-0.06 0.29 0.23 0.06 NEW l
37 65 04H
-0.06 0.46 0.31 0.15 NEW t
37 67 04H
+0.03 0.4 0.25 0.15 i
37 72 02H
-0.06 0.42 0.39 0.03 NEW l'
38 34 03H
+0.00 0.07 0.11
-0.04 NEW 38 34 04H
+0.09 0.43 0.39 0.04 38 72 02H
+0.06 0.24 0.38
-0.14 NEW 39 31 04H
+0.06 0.29 0.25 0.04 39 33 02H
+0.09 0.31 0.27 0.04 NEW
)
39 33 04H
+0.00 0.31 0.28 0.03 NEW 39 63 04H
+0.09 0.25 0.19 0.06 NEW i
40 65 04H
-0.03 0.26 0.55
-0.29 41 34 05H
+0.06 0.41 0.13 0.28 NEW l
42 34 03H
+ 0.12 0.49 0.53
-0.04
)
43 63 04H
+0.06 0.25 0.05 0.2 NEW 43 67 04H
+0.03 0.31 0.13 0.18 NEW l-44 57 04H
+0.00 0.43 0.27 0.16 NEW I
44 86 04H
+0.03 0.29 0.39
-0.1 NEW l
45 65 04H
-0.09 0.36 0.07 0.29 NEW 47 34 03H
-0.03 0.4 0.77
-0.37 NEW l
l i
i l
l l
Page 11 of 65 51-1245664-00 4
b TABLE 3-5 S/G B DSI's DETECTED IN 1RE06 1996 1995 CHANGE ROW COL LOCATION
_1RE06 VOLTS 1RE05 VOLTS IN VOLTS COMMENTS 12 25 02H
+0.00 0.29 0.28 0.01 NEW 12 99 06H
+0.09 0.31 0.11 0.2 NEW 14 106 02H.
+0.18 0.37 0.44
-0.07 l
16 103 04H
+0.00 0.27 0.22 0.05 NEW
~
17 14 06H
+0.00 0.23 0.21 0.02 NEW 17 16 06H
-0.03 0.27 0.1 0.17 NEW l
17 25 04H
+0.00 0.16 0.25
-0.09 NEW I
17 102 02H
+0.09 0.93 0.46 0.47 l
17 102 03H
+0.09 0.62 0.5 0.12 l
18 10' 03H
+0.15 0.45 0.44 0.01 19 16 04H
-0.09 0.74 0.39 0.35 NEW l
19 27 04H
+0.00 0.19 0.1 0.09 NEW i
21 18 02H
+0.00 0.56 0.39 0.17 21 26 02H
+0.03 0.41 0.57
-0.16 21 34 05H
-0.03 0.22 0.16 0.06 NEW 21 37 05H
+0.09 0.16 0.17
-0.01 NEW 21 92 02H
+0.06 0.28 0.27 0.01 21 92 03H
+0.18 0.39 0.3 0.09 l
21 95 02H
+0.09 0.41 0.37 0.04 21 95 03H
+0.06 0.42 0.26 0.16 NEW 21 97 02H
+0.03 0.5 0.27 0.23 NEW 21 104 02H
+0.00 0.44 0.55
-0.11 I
22 94 03H
+0.09 0.25 0.24 0.01 NEW 23 24 02H
-0.06 0.18 0.26
-0.08 NEW t
23 24 04H
-0.12 0.44 0.5
-0.06 NEW 23 36 04H
-0.06 0.28 0.24 0.04 23 91 02H
+ 0.09 0.26 0.24 0.02 23 92 02H
+0.15 0.53 0.24 0.29 NEW 23 93 02H
+0.06 0.46 0.37 0.09 l
23 95 02H
-0.06 0.21 0.17 0.04 23 98 02H
+0.09 0.29 0.14 0.15 NEW 23 104 02H
-0.06 0.74 0.71 0.03 NEW 1
24 44 04H
+0.03 0.51 0.22 0.29 25 35 02H
+0.09 0.49 0.34 0.15 25 51 04H
-0.03 0.31 0.17 0.14 NEW 25 98 02H
+0.00 0.24 0.13 0.11 NEW 25 103 02H
+0.00 0.25 0.23 0.02 NEW 26 29 04H
-0.09 0.65 0.33 0.32 NEW 26 29 05H
+0.00 0.6 0.49 0.11 NEW 26 35 05H
+0.09 0.22 0.19 0.03 NEW 26 40 02H
+0.06 0.56 0.47 0.09 i
26 47 02H
-0.12 0.26 0.25 0.01 NEW 26 50 04H
+0.03 0.23 0.12 0.11 NEW 26 52 02H
+0.06 0.87 0.63 0.24 26 53 02H
+0.15 0.51 0.66
-0.15 26 55 02H
+0.00 0.56 0.26 0.3 NEW 26 63 02H
+0.09 0.75 0.24 0.51 NEW 26 63 03H
+0.21 0.75 0.58 0.17 NEW 26 66 04H
+0.00 0.22 0.37
-0.15 j
26 67 02H
+0.09 0.18 0.07 0.11 NEW/ PLUGGED l
Page 12 of 65 51-1245664-00 j
i
i
\\
l TABLE 3 5 (Cont'd)
S/G B DSI's DETECTED IN 1RE06 1996 1995 CHANGE j
ROW COL LOCATION 1RE06 VOLTS 1RE05 VOLTS IN VOLTS COMMENTS i
26 67 04H
+0.03 0.33 0.34
-0.01 PLUGGED 26 96 02H
+0.03 0.27 0.17 0.1 NEW 27 28 04H
-0.06 0.33 0.18 0.15 NEW 27 29 04H
+0.00 0.13 0.26
-0.13 NEW 27 35 03H
+0.03 0.29 0.34
-0.05 NEW 27 47 04H
-0.12 0.22 0.07 0.15 NEW 27 52 02H
+0.06 0.48 0.45 0.03 27 52 04H
+ 0.03 0.38 0.38 0
NEW 27 55 02H
+0.03 0.38 0.12 0.26 NEW 27 65 04H
-0.06 0.53 0.18 0.35 NEW l
27 100 02H
+0.03 0.33 0.21 0.12 NEW 27 107 02H
+0.03 0.63 0.42 0.21 NEW 28 46 05H
+0.09 0.16 0.1 0.06 NEW 28 50 04H
+0.03 0.56 0.45 0.11 NEW 28 53 02H
+ 0.12 0.5 0.18 0.32 NEW 28 55 03H
+0.12 0.59 0.35 0.24 NEW 28 66 02H
+0.06 0.44 0.73
-0.29 28 67 04H
+0.03 0.54 0.62
-0.08 28 68 03H
+0.03 0.31 0.35
-0.04 29 34 02H
+ 0.09 0.32 0.26 0.06 NEW 29 37 04H
+0.06 0.71 0.38 0.33 NEW 29 47 02H
-0.03 0.16 0.05 0.11 NEW 29 54 02H
+0.06 0.39 0 38 0.01 29 87 09H
+0.12 1.44 1.33 0.11 PLUGGED 29' 92 03H
-0.09 0.52 0.29 0.23 29 98 02H
+0.06 0.35 0.22 0.13 NEW 30 50 05H
+0.12 0.28 0.11 0.17 NEW 30 53 03H
+0.00 0.42 0.15 0.27 NEW 30 53 04H
+0.06 0.52 0.18 0.34 NEW i
30 95 02H
+0.00 0.33 0.22 0,11 NEW 30 96 02H
+0.06 0.62 0.42 0.2 NEW 30 96 04H
+0.06 0.36 0.25 0.11 NEW 30 101 02H
+0.00 0.19 0.26
-0.07 31 31 04H
+0.12 0.12 0.14
-0.02 NEW 31 37 02H
+0.06 0.19 0.17 0.02 NEW 31 45 06H
+0.06 0.37 0.17 0.2 NEW 31 56 03H
+0.09 0.41 0.18 0.23 NEW 31 93 03H
+0.06 0.39 0.35 0.04 32 33 04H
+ 0.00 0.38 0.2 0.18 NEW 32 43 02H
+0.06 0.6 0.22 0.38 NEW 32 87 02H
+0.00 0.66 0.42 0.24 NEW 32 106 02H
-0.03 0.57 0.72
-0.15 33 34 02H
+0.09 0.18 0.21
-0.03 NEW 33 34 03H
+0.00 0.22 0.28
-0.06 33 34 05H
+0.09 0.28 0.1 0.18 NEW 34 83 04H
+ 0.06 0.22 0.23
-0.01 NEW 34 91 04H
+ 0.15 0.43 0.3 0.13 NEW 34 92 02H
+ 0.09 0.41 0.16 0.25 NEW 34 92 03H
+0.03 0.29 0.26 0.03 NEW 35 29 05H
+ 0.00 0.38 0.25 0.13 NEW s
Page 13 of 65 51-1245664-00
. - =
_ = -. _-
TABLE 3-5 (Cont'd)
S/G B DSl's DETECTED IN 1RE06 1996 1995 CHANGE ROW COL LOCATION 1RE06 VOLTS 1RE05 VOLTS IN VOLTS COMMENTS 35 30 02H
+0.03 0.17 0.13 0.04 NEW 35 32 04H
+ 0.12 0.36 0.35 0.01 35 90 04H
-0.03 0.27 0.18 0.09 NEW 36 33 03H
+0.06 0.38 0.51
-0.13 36 45 05H
+ 0.22 0.44 0.1 0.34 NEW 36 48 06H
+0.00 0.34 0.19 0.15 NEW 36 67 03H
+0.06 0.33 0.25 0.08 NEW 36 96 02H
+0.06 0.34 0.2 0.14 NEW 36 96 04H
-0.03 0.27 0.1 0.17 NEW 37 33 04H
+0.09 0.18 0.36
-0.18 37 38 04H
+0.09 0.21 0.14 0.07 NEW 38 93 02H
+ 0.18 0.22 0.24
-0.02 NEW 39 28 04H
+ 0.12 0.19 0.2
-0.01 NEW 39 34 02H
+0.00 0.22 0.23
-0.01 39 54 02H
-0.03 0.29 0.32
-0.03 NEW 40 45 OSH
+0.16 0.44 0.16 0.28 NEW 40 48 04H
+0.00 0.35 0.22 0.13 NEW 40 66 03H
+0.06 0.27 0.23 0.04 NEW 42 50 04H
+0.00 0.27 0.19 0.08 NEW 42 62 04H
-0.03 0.5 0.16 0.34 42 65 02H
+0.06 0.57 0.43 0.14 43 31 04H
+0.06 0.14 0.2
-0.06 NEW 44 40 04H
+0.03 0.3 0.17 0.13 NEW 44 49 04H
+ 0.00 0.23 0.25
-0.02 NEW 46 56 02H
+0.09 1
0.35 0.65 NEW r
i Page 14 of 65 51-1245664-00
TABLE 3-6 SIG C DSI's DETECTED IN 1RE06 1996 1995 CHANGE ROW COL LOCATION 1RE06 VOLTS 1RE05 VOLTS IN VOLTS COMMENTS 7
68 03H
+0.06 0.16 0.1 0.06 NEW 9
11 02H
+0.06 0.51 0.43 0.08 NEW 9
108 02H
+0.03 0.29 0.27 0.02 NEW 10 20 04H
+0.00 0.23 0.21 0.02 NEW 11 19 04H
+0.12 0.15 0.22
-0.07 NEW 12 27 04H
+0.06 0.11 0.09 0.02 l
13 16 03H
+0.03 0.38 0.35 0.03 13 18 04H
+0.00 0.21 0.37
-0.16 NEW 13 30 02H
+0.03 0.72 0.64 0.08 l
13 58 03H
+0.00 0.27 0.3
-0.03 13 75 02H
+ 0.15 0.39 0.3 0.09 NEW 13 102 02H
-0.03 0.21 0.27
-0.06 13 103 02H
+0.06 0.46 0.76
-0.3 14 14 04H
+0.00 0.32 0.27 0.05 NEW 14 15 03H
+0.06 0.33 0.27 0.06 14 17 02H
+0.03 0.21 0.57
-0.36 14 17 03H
-0.03 0.23 0.39
-0.16 NEW 14 93 02H
+0.15 0.43 0.25 0.18 NEW 14 94 02H
+ 0.06 0.83 0.31 0.52 14 95 02H
-0.03 0.33 0.17 0.16 NEW 14 98 02H
+0.06 0.72 0.73
-0.01 15 11 02H
-0.03 0.36 0.33 0.03 NEW 15 11 04H
+0.06 0.54 0.57
-0.03 NEW 15 13 02H
-0.03 0.34 0.5
-0.16 NEW i
15 15 02H
+0.03 0.2 0.21
-0.01 NEW 15 15 03H
+0.06 0.15 0.23
-0.08 NEW 15 19 04H
+0.06 0.3 0.25 0.05 NEW 15 24 02H
+0.03 0.32 0.44
-0.12 NEW 15 25 02H
+0.00 0.27 0.39
-0.12 15 26 04H
+0.00 0.3 0.24 0.06 NEW 15 29 02H
+0.09 0.44 0.46
-0.02 15 29 04H
+0.12 0.43 0.25 0.18 NEW 15 32 03H
+ 0.06 0.68 0.24 0.44 15 33 02H
+0.06 0.5 0.62
-0.12 15 95 02H
+ 0.15 0.41 0.35 0.06 15 102 02H
+0.00 0.19 0.17 0.02 15 104 02H
+0.03 0.25 0.34
-0.09 16 21 03H
+0.06 0.41 0.49
-0.08 16 88 02H
-0.03 0.29 0.29 0
NEW 16 94 02H
-0.09 0.28 0.12 0.16 16 96 03H
+0.00 0.69 0.54 0.15 16 97 02H
+ 0.09 0.32 0.27 0.05 NEW 16 103 02H
+0.09 0.35 0.15 0.2 NEW 16 105 04H
+0.06 0.22 0.23
-0.01 16 109 02H
+0.03 0.3 0.37
-0.07 16 111 06H
+0.09 0.15 0.15 0
NEW 17 24 04H
+0.06 0.4 0.55
-0.15 NEW 17 25 02H
+0.03 0.64 0.33 0.31 17 26 02H
+ 0. 00 0.58 0.59
-0.01 l
17 29 04H
-0.15 0.44 0.32 0.12 NEW Page 15 of 65 51-1245664-00
~.-
I TABLE 3-6 (Cont'd)
S/G C DSI's DETECTED IN 1RE06 1996 1995 CHANGE ROW COL LOCATION
_1RE06 VOLTS 1RE05 VOLTS IN VOLTS COMMENTS 17 30 03H
+ 0.12 0.38 0.32 0.06 17 100 03H
+0.03 0.26 0.45
-0.19 18 12 02H
+0.06 0.47 0.17 0.3 NEW 18 14 02H
+0.00 0.28 0.23 0.05 18 17 02H
-0.06 0.2 0.17 0.03 NEW 18 17 04H
+0.06 0.14 0.3
-0.16 NEW 18 24 02H
-0.03 0.55 0.29 0.26 18 25 02H
+0.00 0.45 0.38 0.07 NEW 18 27 02H
+ 0.09 0.51 0.3 0.21 18 27 03H
+0.03 0.45 0.23 0.22 18 27 04H
+0.06 0.46 0.28 0.18 l
18 28 02H
+0.09 0.24 0.13 0.11 i
18 32 04H
+0.06 0.2 NDD N/A NEW I
18 91 04H
+0.09 0.26 0.13 0.13 NEW 18 94 02H
+0.03 0.31 0.23 0.08 l
18 96 02H
+0.20 0.18 0.07 0.11 NEW 18 97 02H
+ 0.12 0.41 0.32 0.09 NEW 18 97 03H
+0.00 0.32 0.3 0.02 NEW 18 105 03H
+0.03 C.19 0.19 0
NEW l
19 10 03H
+0.00
(.66 0.37 0.29 NEW 19 13 03H
+ 0.06 C.26 0.19 0.07 NEW 19 14 02H
+0.03 0.73 0.7 0.03
)
l 19 15 02H
+0.03 0.31 0.29 0.02 NEW 19 15 03H
-0.03 0.19 0.3
-0.11 NEW j
l 19 15 04H
-0.06 0.15 0.34
-0.19 NEW 19 17 02H
+0.12 0.98 0.88 0.1 19 19 02H
-0.03 0.38 0.39
-0.01 19 23 02H
+0.03 0.37 0.6
-0.23 19 26 02H
+0.00 0.85 0.9
-0.05 19 26 04H
+0.00 0.27 0.1 0.17 NEW 19 27 02H
+0.03 0.44 0.3 0.14 NEW 19 27 04H
+0.09 0.16 NDD N/A NEW 19 38 02H
+0.03 0.48 0.91
-0.43 19 41 02H
+0.00 0.39 0.34 0.05 NEW 19 46 02H
+0.00 0.81 0.65 0.16 NEW 19 46 03H
+0.00 0.58 0.45 0.13 NEW 19 46 04H
+0.00 0.74 0.41 0.33 19 84 02H
+0.09 0.46 0.1 0.36 NEW 19 84 04H
+0.03 0.33 0.24 0.09 NEW 19 85 OSH
+0.26 0.45 0.19 0.26 NEW 19 95 02H
+0.09 0.74 0.59 0.15 NEW 20 15 04H
+0.00 0.41 0.5
-0.09 NEW 20 26 04H
-0.03 0.2 0.22
-0.02 20 31 02H
-0.06 0.48 0.41 0.07 20 33 02H
+ 0.06 0.27 0.23 0.04 20 38 03H
-0.06 0.5 0.56
-0.06 20 39 03H
+ 0. 06 0.2 0.2 0
NEW 20 40 02H
-0.03 0.33 0.58
-0.25 20 46 03H
-0.12 0.48 0.33 0.15 20 47 02H
+ 0.00 1.31 0.26 1.05 l
l Page 16 of 65 51-1245664-00 l
l 1
l t
i; TABLE 3-6 (Cont'd)
S/G C DSI's DETECTED IN 1RE06 i
1996 1995 CHANGE j
ROW COL LOCATION 1RE06 VOLTS 1RE05 VOLTS IN VOLTS COMMENTS 20 47 03H
-0.18 0.3 0.23 0.07 NEW 20 47 04H
-0.06 0.37 0.2 0.17 NEW 20 79 02H
-0.03 0.63 0.76
-0.13 1
20-81 02H
+0.03 0.54 0.68
-0.14 20 88 02H
-0.09 0.23 0.19 0.04 NEW i
20 88 04H
+0.03 0.26 0.11 0.15 NEW 20 94 02H
-0.03 0.15 0.14 0.01 NEW 20 97 02H
+0.09 0.17 0.67
-0.5 20 98 02H
+0.03 0.41 0.48
-0.07 20 99 02H
+0.06 0.21 0.24
-0.03 4
20 106 02H
+0.03 0.65 0.52 0.13 NEW i
20 106 05H
+0.06 0.36 0.34 0.02 NEW 21 14 02H
+0.03 0.79 0.94
-0.15 2-21 14 04H
+0.03 0.8 0.79 0.01 NEW 21 28 02H
+0.00 0.46 0.4 0.06 NEW 21 33 02H
+0.06 0.84 0.8 0.04 21 39 02H
+0.09 0.19 0.55
-0.36 l
21 41 02H
+ 0.17 0.2 0.18 0.02 NEW 21 41 03H
+0.03 0.64 0.55 0.09 NEW l
21 44 02H
-0.03 0.19 0.17 0.02 NEW i
21 48 02H
+0.00 0.9 0.65 0.25 NEW 21 75 04H
+0.03 0.46 0.51
-0.05 1
21 76 02H
-0.03 0.34 0.36
-0.02 PLUGGED 21 76 03H
+0.06 0.22 0.43
-0.21 PLUGGED 3
4 21 77 02H
+0.00 0.48 0.26 0.22 NEW 21 77 04H
+0.06 0.34 0.3 0.04 NEW 21 88 04H
+0.09 0.17 0.17 0
NEW 21 95 02H
+0.06 0.33 0.31 0.02 22 15 02H
+0.00 0.62 0.4 0.22 NEW 22 16 02H
-0.03 0.3G 0.29 0.07 NEW j
22 21 03H
+0.06 0.37 0.35 0.02 NEW 22 37 02H
+0.23 0.39 0.44
-0.05 22 37 03H
+ 0.12 0.42 0.38 0.04 22 78 02H
+0.03 0.81 0.6 0.21 22 79 02H
+0.03 0.31 0.54
-0.23 22 89 04H
+0.06 0.23 0.16 0.07 NEW 22 113 02H
+0.12 0.14 0.11 0.03 NEW 23 20 02H
+0.03 0.48 0.5
-0.02 23 47 03H
-0.12 0.27 0.5
-0.23 23 54 03H
+ 0.12 0.27 0.26 0.01 NEW 23 58 04H
+0.00 0.18 0.29
-0.11 NEW 23 66 02H
-0.06 0.72 0.87
-0.15 NEW 23 66 04H
+0.03 0.62 0.82
-0.2 23 71 04H
~0.09 0.27 0.32
-0.05 NEW 23 73 03H
+0.06 0.23 0.29
-0.06 NEW 23 77 04H
+0.03 0.24 0.45
-0.21 23 81 02H
+0.00 0.28 0.25 0.03 NEW 23 91 02H
+0 03 0.42 0.38 0.04 NEW 23 95 04H
+ 0.00 0.21 0.17 0.04 NEW 23 102 02H
-0.03 0.22 0.24
-0.02 Page 17 of 65 51-1245664-00
TABLE 3-6 (Cont'd)
SIG C DSl's DETECTED IN 1RE06 1996 1995 CHANGE ROW COL LOCATION 1RE06 VOLTS 1RE05 VOLTS IN VOLTS COMMENTS 24 34 02H
+0.09 0.89 1.11
-0.22 24 58 02H
+0.09 0.21 0.25
-0.04 NEW t
24 64 02H
+0.06 0.42 0.3 0.12 24 64 03H
+0.00 0.46 0.45 0.01 24 66 04H
+0.15 0.34 0.46
-0.12 i
24 78 02H
+0.00 0.37 0.53
-0.16
)
24 78 03H
+0.06 0.28 0.23 0.05 24 79 02H
-0.06 0.31 0.3 0.01 NEW 24 80 02H
+0.03 0.96 0.9 0.06 24 83 02H
+0.03 0.19 0.45
-0.26 24 85 02H
+0.03 0.24 0.54
-0.3 24 85 04H
+0.00 0.22 0.6
-0.38 24 93 02H
+0.06 0.48 0.37 0.11 NEW 24 103 02H
+0.00 0.54 0.57
-0.03 24 103 04H
+0.03 0.26 0.23 0.03 NEW 24 104 04H
+0.03 0.28 0.25 0.03 NEW 24 105 03H
+0.03 0.34 0.28 0.06 NEW 25 19 03H
+0.00 0.14 0.09 0.05 NEW 25 22 02H
+0.03 0.56 0.57
-0.01 NEW 25 39 03H
+ 0.18 0.39 0.73
-0.34 25 43 02H
-0.03 0.64 0.4 0.24 NEW 25 48 02H
-0.20 0.75 0.5 0.25 NEW 25 55 02H
+0.00 0.28 0.44
-0.16 t
25 57 03H
+0.03 0.2 0.36
-0.16 NEW 25 58 03H
+0.03 0.35 0.43
-0.08 NEW 25 64 02H
+0.00 0.16 0.43
-0.27 NEW 25 64 03H
-0.06 0.2 0.35
-0.15 NEW 25 66 04H
+0.03 0.15 0.24
-0.09 NEW 25 67 02H
-0.15 0.68 0.59 0.09 NEW/ PLUGGED 25 72 04H
+0.03 0.16 0.19
-0.03 NEW 25 73 02H
+0.06 0.24 0.24 0
NEW/ PLUGGED 25 85 02H
+0.00 0.18 0.17 0.01 NEW 25 104 04H
+0.03 0.36 0.31 0.05 NEW 26 14 02H
+0.03 0.35 0.66
-0.31 NEW 26 29 05H
+0.09 0.5 0.25 0.25 NEW 26 62 02H
+0.09 0.19 0.32
-0.13 NEW 26 64 02H
+0.00 0.39 0.8
-0.41 26 64 05H
+0.00 0.32 0.45
-0.13 26 65 02H
+0.03 0.62 0.5 0.12 26 66 04H
+0.03 0.24 0.46
-0.22 26 67 02H
+0.00 0.79 0.87
-0.08 26 67 03H
+0.06 0.51 0.54
-0.03 26 67 04H
+0.12 0.28 0.64
-0.36 26 75 03H
+0.15 '
O.35 0.23 0.12 NEW 26 78 02H
+0.03 0.15 0.13 0.02 NEW 26 79 02H
-0.09 0.32 0.29 0.03 NEW 26 81 02H
-0.03 0.3 0.34
-0.04 26 82 05H
+0.06 0.13 0.09 0.04 NEW 27 17 02H
+0.06 0.23 0.23 0
27 34 02H
-0.03 0.43 0.6
-0.17 l
Page 18 of 65 51-1245664-00
TABLE 3-6 (Cont'd)
S/G C DSI's DETECTED IN 1RE06 1996 1995 CHANGE ROW COL LOCATION 1RE06 VOLTS 1RE05 VOLTS IN VOLTS COMMENTS 27 57 02H
+0.06 0.27 0.2 0.07 NEW 27 57 03H
+0.09 0.6 0.5 0.1 NEW 27 65 02H
-0.03 0.14 0.25
-0.11 NEW 27 81 02H
+0.12 0.23 0.49
-0.26 27 85 02H
+0.03 0.34 0.34 0
NEW 27 86 07H
+0.15 0.25 0.14 0.11 NEW 27 95 02H
+0.03 0.22 0.21 0.01 27 104 04H
+0.03 C.89 0.76 0.13 27 107 04H
+0.09 0.18 0.11 0.07 NEW 28 39 03H
-0.03 0.42 0.39 0.03 NEW 28 58 05H
+ 0.12 0.25 0.33
-0.08 NEW 28 62 02H
+0.09 0.31 0.32
-0.01 NEW 28 62 04H
-0.03 0.39 0.36 0.03 NEW 28 63 02H
+0.06 0.39 0.41
-0.02 NEW 28 66 02H
+0.06 0.28 0.29
-0.01 28 67 02H
-0.09 0.3 0.42
-0.12 28 68 02H
+0.03 0.18 0.2
-0.02 28 78 03H
+0.03 0.13 0.1 0.03 NEW 28 91 02H
-0.06 0.22 0.28
-0.06 28 92 06H
+0.09 0.21 0.17 0.04 NEW 28 94 04H
-0.06 0.33 0.15 0.18 NEW 29 15 04H
+0.03 0.2 0.13 0.07 NEW 29 24 02H
-0.06 0.5 0.47 0.03 NEW 29 30 04H
+0.03 0.21 0.38
-0.17 29 35 02H
+0.00 0.13 0.1 0.03 NEW 29 35 04H
+0.03 0.39 0.25 0.14 NEW 29 56 02H
+0.12 0.34 0.45
-0.11 NEW 29 59 02H
+0.09 0.24 0.24 0
NEW 29 63 03H
+0.06 0.36 0.37
-0.01 29 64 03H
-0.03 0.32 0.26 0.07 NEW 29 74 02H
+0.09 0.12 0.25
-0.13 29 76 02H
+0.00 0.5 0.62
-0.12 29 77 02H
+0.09 0.49 0.64
-0.15 29 81 02H
-0.03 0.18 0.15 0.03 NEW 29 83 02H
-0.03 0.21 0.4
-0.19 29 83 05H
+ 0.09 0.4 0.39 0.01 29 83 06H
+ 0.12 0.37 0.3 0.07 NEW 29 84 02H
+0.12 0.35 0.44
-0.09 29 86 02H
+0.09 0.19 0.18 0.01 NEW 29 87 02H
-0.03 0.18 0.13 0.05 NEW 30 26 04H
-0.06 0.47 0.36 0.11 NEW 30 34 02H
+0.00 0.12 0.24
-0.12 30 47 02H
-0.09 0.27 0.19 0.08 30 52 02H
-0.03 0.4 0.45
-0.05 30 52 03H
-0.06 0.62 0.22 0.4 NEW l
30 57 02H
+0.09 0.48 0.39 0.09 l
30 57 04H
+0.06 0.4 0.41
-0.01 30 63 04H
+ 0.06 0.12 0.11 0.01 NEW 30 63 05H
+0.03 0.19 0.23
-0.04 NEW 30 64 02H
+0.03 0.2 0.39
-0.19 I
i Page 19 of 65 51-1245664-00
l TABLE 3-6 (Cont'd)
S/G C DSI's DETECTED IN 1RE06 1996 1995 CHANGE ROW COL LOCATION 1RE06 VOLTS 1RE05 VOLTS IN VOLTS COMMENTS 30 65 02H
-0.09 0.27 0.45
-0.18 30 66 02H
+0.06 0.4 0.4 0
30 69 02H
+0.03 0.38 0.34 0.04 30 70 02H
+0.03 0.2 0.15 0.05 NEW 30 79 02H
+0.03 0.38 0.31 0.07 NEW l
30 84 02H
+0.20 0.67 0.35 0.32 i
30 89 03H
+0.03 0.29 0.29 0
NEW i
30 91 02H
+0.03 0.3 0.3 0
30 94 02H
+0.09 0.17 0.10
-0.01 NEW 31 27 03H
+0.03 0.64 0.4 0.24 NEW 31 58 03H
+0.03 0.45 0.4 0.05 NEW 31 62 02H
-0.09 0.16 0.2
-0.04 NEW 31 66 02H
+ 0.17 0.38 0.36 0.02 NEW 31 67 02H
+0.00 0.6 0.24 0.36 31 69 04H
+0.06 0.17 0.19
-0.02 NEW 31 83 02H
-0.03 0.17 0.55
-0.38 31 83 08H
+0. 00 0.18 0.17 0.01 NEW 31 84 02H
+0.06 0.45 0.33 0.12 NEW 31 84 03H
+0.09 0.63 0.6 0.03 NEW 31 84 05H
+0.12 0.4 0.31 0.09 NEW 31 91 04H
+0.06 0.25 0.21 0.04 NEW 31 100 03H
+0.09 0.27 0.13 0.14 NEW 31 102 02H
+0.03 0.15 0.08 0.07 NEW 32 20 02H
+0.09 0.31 0.31 0
NEW 32 33 02H
+0.09 0.2 0.18 0.02 32 33 05H
+0.09 0.47 0.45 0.02 32 34 04H
+0.09 0.29 0.15 0.14 NEW 32 64 02H
+0.03 0.64 0.93
-0.29 32 65 02H
+0.00 0.22 0.21 0.01 32 65 04H
+ 0.12 0.31 0.13 0.18 32 67 02H
+ 0.12 0.19 0.1 0.09 NEW 32 75 04H
+0.00 0.41 0.38 0.03 f
32 80 03H
+0.00 0.21 0.15 0.06 NEW 32 81 02H
-0.06 0.19 0.29
-0.1 32 97 02H
+0.03 0.18 0.14 0.04 NEW 33 19 04H
+0.06 0.39 0.43
-0.04 NEW 33 28 02H
+0.12 0.14 0.3
-0.16 r
33 28 04H
+0.18 0.15 0.1 0.05 NEW 33 68 02H
+0.03 0.48 0.34 0.14 NEW 33 76 04H
+0.06 0.59 0.48 0.11 NEW 33 78 04H
+0.00 0.21 0.18 0.03 NEW 33 85 07H
+0.00 0.11 0.15
-0.04 34 29 04H
+0.26 0.24 0.22 0.02 34 41 02H
+0.00 0.89 0.86 0.03 34 42 03H
+0.09 0.26 0.18 0.08 NEW 34 71 03H
-0.09 0.31 0.3 0.01 NEW 34 75 02H
+ 0.12 0.41 0,35 0.06 NEW 34 76 02H
+0.03 0.37 0.35 0.02 NEW 34 76 04H
+0.03 0.22 0.2 0.02 NEW 34 80 02H
+0.03 0.54 0.42 0.12 4
l l
Page 20 of 65 51-1245664-00 l
l
e 0
l TABLE 3-6 (Cont'd)
SIG C DSl's DETECTED IN 1RE06 1996 1995 CHANGE ROW COL LOCATION 1RE06 VOLTS 1RE05 VOLTS IN VOLTS COMMENTS 34 80 04H
+0.03 0.28 0.34
-0.06 34 81 02H
+0.12 0.5 0.4 0.1 NEW 34 81 03H
+0.06 0.33 0.28 0.05 NEW 34 101 04H
+0.00 0.27 0.16 0.11 NEW 34 102 03H
+0.03 0.23 0.17 0.06 NEW 35 21 03H
+0.06 -
0.37 0.31 0.06 NEW 35 26 04H
+0.09 0.3 0.24 0.06 NEW 35 31 02H
+0.12 0.24 BDA N/A NEW i
35 35 04H
+0.09 0.19 0.14 0.05 l
35 36 03H
+0.12 0.71 0.65 0.06 I
35 36 04H
+0.09 0.3 0.38
-0.08 35 39 02H
+0.00 0.38 0.38 0
35 40 04H
+0.00 0.3 0.25 0.05 NEW 35 48 02H
+0.00 0.47 0.35 0.12 NEW 35 56 02H
+0.06 0.29 0.27 0.02 NEW 35 56 05H
+0.03 0.47 0.27 0.2 NEW i
35 57 03H
+0.06 0.26 0.25 0.01 NEW j
35 58 02H
+0.09 0.14 0.39
-0,25 l
35 64 02H
+0.09 0.32 0.34
-0.02 35 75 02H
+0.09 0.17 0.15 0.02 NEW 35 77 02H
+0.00 0.23 0.2 0.03 NEW 35 77 07H
+ 0.12 0.28 0.2 0.08 NEW
]
35 83 02H
+0.00 0.38 0.27 0.11 NEW 35 85 04H
+0.09 0.19 0.42
-0.23 1
35 86 02H
+ 0.12 0.2 0.17 0.03 NEW 35 87 04H
+0.03 0.17 0.13 0.04 NEW 35 90 02H
+0.09 0.48 0.45 0.03 NEW 35 93 03H
+0.00 0.17 0.57
-0.4 i
35 101 02H
+0.03 0.64 0.43 0.21 NEW 36 24 04H
+0.03 0.25 0.27
-0.02 NEW 36 25 02H
+0.03 0.34 0.3 0.04 NEW 36 30 02H
-0.03 0.11 0.18
-0.07 i
36 34 06H
-0.06 0.17 0.2
-0.03 NEW 36 47 04H
-0.12 0.33 0.2 0.13 NEW 36 74 03H
+ 0.00 0.59 0.58 0.01 NEW 36 87 04H
+0.00 0.46 0.35 0.11 NEW 36 95 03H
+ 0.06 0.47 0.23 0.24 NEW 36 100 04H
+ 0.12 0.15 0.06 0.09 NEW 37 28 02H
+0.20 0.41 0.11 0.3 NEW 37 33 02H
-0.06 0.24 0.24 0
NEW 37 39 03H
+ 0.00 0.73 0.78
-0.05 37 57 04H
+0.00 0.24 0.4
-0.16 37 75 04H
+0.03 0.33 0.3 0.03 NEW 37 76 07H
+0.03 0.24 0.2 0.04 NEW 37 80 02H
+0.00 0.36 0.22 0.14 NEW 37 81 02H
-0.12 0.58 0.55 0.03 37 85 04H
+ 0.09 0.16 0.32
-0.16 38 25 04H
+ 0.00 0.32 0.43
-0.11 NEW i
l 38 28 05H
+0.06 0.48 0.3 0.18 NEW 38 46 02H
+0.00 0.31 0.19 0.12 NEW i
Page 21 of 65 51-1245664-00 l
TABl.E 3-6 (Cont'd) l S/G C DSI's DETECTED IN 1RE06 1996 1995 CHANGE l
ROW COL LOCATION 1RE06 VOLTS 1RE05 VOLTS IN VOLTS COMMENTS 38 46 04H
+ 0.06 0.19 0.1 0.09 NEW 38 49 02H
-0.03 1.56 1.51 0.05 38 49 04H
-0.11 0.34 0.56
-0.22 38 68 04H
+ 0.06 0.21 0.34
-0.13 i
38 77 02H
+0.00 0.54 0.34 0.2 38 83 02H
+0.03 0.71 0.5 0.21 38 83 04H
+0.09 0.26 0.49
-0.23 38 87 05H
+ 0.12 0.15 0.14 0.01 NEW 38 88 02H
+0.12 0.48 0.33 0.15 NEW 38 88 03H
+0.06 0.34 0.22 0.12 NEW l
38 88 04H
+ 0.06 0.26 0.24 0.02 NEW 38 94 02H
+0.00 0.26 0.1 0.16 NEW 39 28 02H
+0.06 0.5 0.52
-0.02 39 31 04H
+0.00 0.58 0.36 0.22 NEW 39 44 04H
+0.03 0.26 0.2 0.06 NEW 39 48 04H
+0.03 0.23 0.19 0.04 NEW 39 50 02H
+0.00 0.13 0.13 0
NEW 39 50 03H
+0.00 0.52 0.26 0.26 39 68 04H
+0.09 0.19 0.24
-0.05 NEW 39 76 04H
+0.03 0.33 0.44
-0.11 39 77 02H
+0.00 0.5 0.41 0.09 39 82 02H
+0.06 0.32 0.32 0
NEW 39 82 03H
+0.09 0.2 0.15 0.05 NEW
[
39 83 03H
+0.03 0.17 0.13 0.04 NEW 39 86 04H
+0.09 0.31 0.22 0.09 NEW l
40 28 04H
+ 0.15 0.38 0.22 0.16 40 31 04H
+0.00 0.28 0.15 0.13 NEW l
40 35 04H
+0.09 0.29 0.28 0.01 NEW 40 46 02H
-0.09 0.66 0.66 0
NEW 40 48 04H
-0.23 0.22 0.17 0.05 l
40 55 02H
+0.06 0.38 0.4
-0.02 NEW l
40 64 04H
+0.03 0.23 0.32
-0.09 l
40 67 02H
+0.06 0.39 0.8
-041 40 71 02H
-0.06 0.18 0.19
-0.01 NEW l
40 77 02H
+0.06 0.51 0.4 0.11 NEW t
40 86 04H
+0.03 0.52 0.4 0.12 NEW j
40 87 03H
+ 0.12 0.55 0.56
-0.01 40 87 04H
+0.03 0.48 0.35 0.13 40 89 02H
-0.03 0.26 0.26 0
NEW 41 48 04H
-0.06 0.46 0.28 0.18 41 49 02H
-0.06 0.33 0.29 0.04 NEW 41 50 04H
-0.09 0.14 INR N/A NEW 41 68 04H
+0.03 0.37 0.36 0.01 NEW l
41 71 02H
+0.00 0.18 0.26
-0.08 NEW 41 75 03H v0.06 0.17 0.17 0
NEW 41 79 02H
+0.00 0.33 0.3 0.03 NEW 41 80 02H
-0.03 0.17 0.15 0.02 NEW l
41 84 02H
+0.20 0.52 0.38 0.14 NEW 41 84 09H
+ 0.06 0.21 0.18 0.03 NEW 42 44 02H
+ 0. 00 0.15 0.1 0.05 NEW i
Page 22 of 65 51-1245664-00
TABLE 3-6 (Cont'd)
SIG C DSI's DETECTED IN 1RE06 1996 1995 CHANGE ROW COL LOCATION 1RE06 VOLTS 1RE05 VOLTS IN VOLTS COMMENTS I
i l
42 45 02H
+ 0.09 0.72 0.71 0.01 NEW 42 45 04H
+0.00 0.41 0.4 0.01 NEW 42 48 04H
-0.09 0.37 0.33 0.04 42 50 04H
-0.12 0.3 0.2 0.1 NEW 42 71 02H
-0.03 0.35 0.58
-0.23 42 71 04H
+0.00 0.35 0.36
-0.01 NEW 42 75 04H
+0.03 0.42 0.47
-0.05 42 76 02H
+0.00 0.31 0.37
-0.06 42 76 04H
+0.03 0.46 0.4 0.06 NEW 42 81 02H
+0.06 0.75 0.65 0.1 42 88 04H
+0.09 0.22 0.22 0
NEW 42 90 03H
+0.09 0.16 0.11 0.05 NEW 42 91 04H
+0.03 0.19 0.11 0.08 NEW 43 64 04H
+0.06 0.19 0.46
-0.27 43 68 04H
+0.03 0.22 0.23
-0.01 NEW 43 69 05H
+0.06 0.25 0.26
-0.01 NEW 43 74 02H
+0.03 0.67 0.68
-0.01 I
43 76 04H
+0.03 0.33 0.28 0.05 43 77 02H
+0.06 0.24 0.42
-0.18 43 77 04H
-0.03 0.22 0.15 0.07 NEW 43 79 02H
+0.00 0.26 0.22 0.04 NEW 43 79 03H
+0.03 0.2 0.15 0.05 NEW 43 81 04H
-0.03 0.17 0.15 0.02 NEW 43 87 04H
+0.00 0.25 0.16 0.09 NEW 44 42 02H
-0.03 0.65 0.63 0.02 44 43 02H
-0.12 0.34 0.29 0.05 NEW 44 55 04H
+0.03 0.45 0.4 0.05 NEW 44 55 05H
+0.06 0.16 0.18
~-0.02 NEW 44 57 06H
+0.00 0.16 0.25
-0.09 NEW 44 72 02H
+0.09 0.14 0.13 0.01 44 75 02H
+0.06 0.54 0.4 0.14 NEW 44 85 04H
-0.03 0.19 0.18 0.01 NEW 45 49 02H
-0.06 0.21 0.16 0.05 NEW 45 74 02H
+0.09 0.42 0.2 0.22 45 76 04H
+0.00 0.3 0.25 0.05 NEW 45 77 04H
+ 0.00 0.25 0.22 0.03 NEW 45 84 02H
+0.06 0.35 0.13 0.22 NEW 46 41 04H
+0.09 0.22 0.2 0.02 NEW 46 50 02H
-0.06 0.43 0.5
-0.07 46 50 04H
-0.03 0.23 0.1 0.13 NEW 46 72 02H
+0.09 0.18 0.2
-0.02 47 71 02H
+0.09 0.13 0.1 0.03 NEW i
Page 23 of 65 51-1245664-00
1 TABLE 3-7 SIG D DSl's DETECTED IN 1RE06 1996 1995 CHANGE ROW COL LOCATION 1RE06 VOLTS 1RE05 VOLTS IN VOLTS COMMENTS 8
11 02H
+ 0.06 0.66 0.22 0.44 NEW 9
7 02H
+ 0.03 0.35 0.2 0.15 NEW l
9 11 02H
+0.06 0.46 0.33 0.13 NEW i
9 13 05H
+0.06 0.17 0.2
-0.03 NEW 10 7
02H
+0.03 0.54 0.16 0.38 10 10 02H
+0.06 0.5 0.24 0.26 10 13 05H
+0.03 0.27 0.07 0.2 NEW 10 15 02H
+0.03 0.3 0.16 0.14 NEW 10 15 04H
+0.09 0.15 0.08 0.07 NEW 10 16 02H
-0.03 0.38 0.47
-0.09 10 17 02H
+0.06 0.21 0.33
-0.12 11 10 05H
+0.06 0.29 0.12 0.17 NEW 11 11 03H
+0.06 0.33 0.16 0.17 NEW 11 13 02H
+0.03 0.31 0.34
-0.03 NEW l
11 13 05H
+0.06 0.32 0.16 0.16 NEW 11 15 02H
+0.15 0.37 0.15 0.22 NEW 12 7
02H
+0.00 0.28 0.14 0.14 NEW 12 11 05H
-0.03 0.21 0.11 0.1 NEW 12 15 02H
+0.00 0.47 0.35 0.12
)
1 12 16 04H
+0.09 0.27 0.18 0.09 NEW 13 11 02H
+0.00 0.5 0.45 0.05 NEW 13 12 02H
+0.00 0.18 0.12 0.06 l
13 102 05H
+0.03 0.34 0.32 0.02 NEW l
13 108 02H
-0.03 0.31 0.39
-0.08 NEW 14 16 02H
+0.21 0.22 0.3
-0.08 NEW 14 16 04H
+ 0.12 0.66 0.29 0.37 14 17 02H
+0.03 0.54 0.4 0.14 14 17 04H
+0.00 0.21 0.25
-0.04 14 17 07H
+0.00 0.28 0.18 0.1 NEW 14 23 05H
+0.00 0.33 0.22 0.11 NEW 14 97 04H
+ 0.12 0.24 0.2 0.04 NEW 15 9
02H
+0.00 0.32 0.32 0
15 10 02H
+0.12 0.48 0.49
-0.01 15 10 05H
+0.12 0.3 0.17 0.13 NEW 15 12 02H
+0.06 0.35 0.33 0.02 15 12 05H
-0.06 0.39 0.3 0.09 15 13 04H
+0.06 0.3 0.29 0.01 l
15 17 02H
+000 0.62 0.36 0.26 NEW i
15 18 02H
+0.06 0.41 0.34 0.07 15 26 02H
-0.06 0.36 0.4
-0.04 NEW 16 15 03H
+0.09 0.34 0.13 0 21 NEW j
16 28 02H
+0.12 0.38 0.41
-0.03 NEW 16 29 02H
+0.00 0.26 0.25 0.01 NEW 16 74 02H
+0.00 0.35 0.21 0.14 NEW 16 102 05H
+0.12 0.18 0.3
-0.12 NEW 17 12 02H
+0.06 0.69 0.51 0.18 17 28 02H
+0.09 0.22 0.21 0.01 NEW 17 30 02H
+0.00 0.54 0.27 0.27 NEW 17 32 02H
+0.03 0.29 0.37
-0.08 17 103 02H
-0.03 0.63 0.6 0.03 Page 24 of 65 51-1245664-00 i
t
TABLE 3-7 (Cont'd)
S 'O D DSl's DETECTED IN 1RE06 1996 1995 CHANGE l
ROW COL LOCATION 1RE06 VOLTS C 5 VOLTS IN VOLTS COMMENTS 17 104 02H
+0.00 0.19 0.48
-0.29 17 104 03H
-0.03 0.52 0.51 0.01 17 108 04H
+0.06 0.15 0.13 0.02 NEW 18 12 02H
-0.03 0.4 0.19 0.21 18 14 02H
+0.00 0.26 0.1 0.16 NEW 18 90 05H
+0.00 0.28 0.32
-0.04 NEW l
18 93 02H
+0.09 0.21 0.21 0
NEW 18 95 02H
+0.03 0.77 0.89
-0.12 18 98 02H
-0.06 0.2 0.67
-0.47 18 101 02H
+0.00 0.13 0.28
-0.15 NEW l
18 102 02H
+0.09 0.47 0.52
-0.05 18 109 02H
+0.06 0.58 0.58 0
NEW 18 109 05H
+0.06 0.25 0.19 0.06 NEW 18 110 02H
+0.12 0.36 0.33 0.03 NEW 19 13 02H
+0.09 0.19 0.2
-0.01 NEW 19 13 04H
+0.00 0.55 0.47 0.08 NEW 19 16 02H
+0.06 0.33 0.31 0.02 19 20 02H
+0.00 0.29 0.16 0.13 NEW l
19 20 04H
+0.00 0.38 0.27 0.11 NEW 19 22 02H
+0.13 0.46 0.35 0.11 NEW 19 34 02H
+0.00 0.25 0.24 0.01 19 39 02H
+0.12 0.57 0.31 0.26 NEW 19 73 02H
+0.09 0.2 0.19 0.01 NEW l
19 83 04H
+0.00 0.4 0.36 0.04 19 90 02H
-0.03 0.43 0.48
-0.05 19 93 02H
+0.00 0.31 0.41
-0.1
)
19 94 02H
+0.03 0.26 0.4
-0.14 19 95 02H
+0.00 0.2 0.32
-0.12 l
19 101 03H
+0.03 0.32 0.49
-0.17 NEW 19 102 02H
-0.09 0.52 0.3 0.22 20 19 02H
+ 0.00 0.36 0.31 0.05 NEW 20 42 02H
+0.06 0.53 0.32 0.21 NEW 20 74 02H
+0.12 0.22 0.17 0.05 NEW 20 88 04H
+0.00 0.29 0.13 0.16 NEW 20 104 04H
+0.06 0.17 0.19
-0.02 NEW 21 17 04H
-0.03 0.36 0.21 0.15 NEW 21 32 02H
-0.06 0.41 0.22 0.19 21 90 03H
+0.03 0.22 0.22 0
21 93 02H
+0.06 0.83 0.96
-0.13 21 93 04H
+0.12 0.35 0.31 0.04 NEW 21 97 02H
+0.03 0.29 0.45
-0.16 21 99 02H
+0.03 0.27 0.24 0.03 NEW 22 11 02H
+0.03 0.36 0.24 0.12 NEW 22 13 04H
+0.03 0.23 0.1 0.13 NEW l
22 14 02H
+0.00 0.62 0.04 0.58 NEW 22 28 04H
-0.09 0.35 0.26 0.09 NEW 22 31 02H
+ 0.00 0.27 0.23 0.04 NEW 22 36 02H
+0.03 0.21 0.48
-0.27
[
22 42 03H
+0.06 0.59 0.4 0.19 NEW 22 74 02H
+ 0.03 0.48 0.54
-0.06 Page 25 of 65 51-1245664-00
l O
i TABLE 3-7 (Cont'd)
SIG D DSI's DETECTED lN 1RE06
~
l 1996 1995 CHANGE ROW COL LOCATION 1RE06 VOLTS 1RE05 VOLTS IN VOLTS COMMENTS 22 74 04H
-0.03 0.46 0.29 0.17 NEW 22 80 02H
+0.03 0.33 0.19 0.14 22 95 02H
+0.09 0.24 0.27
-0.03 NEW 22 96 02H
+0.09 0.11 0.52
-0.41 22 98 03H
+ 0.06 0.1 0.29
-0.19 22 104 09H
+0.03 0.3 0.27 0.03 NEW 23 15 07H
+0.09 0.19 0.11 0.08 NEW 23 17 02H
+0.00 0.43 0.36 0.07 NEW 23 28 02H
+0.00 0.38 0.21 0.17 23 31 02H
+0.15 0.49 0.31 0.18 23 41 02H
+0.03 0.15 0.2
-0.05 NEW 23 41 05H
-0.03 0.1 0.11
-0.01 NEW 23 42 03H
+0.00 0.33 0.1 0.23 NEW 23 75 04H
-0.09 0.2 0.37
-0.17 23 87 03H
+0.09 0.34 0.23 0.11 NEW 23 97 03H
+ 0.12 0.3 0.22 0.08 NEW 24 14 02H
+0.03 0.75 0.43 0.32 NEW 24 14 04H
+0.06 0.42 0.23 0.19 NEW 24 14 08H
+ 0.15 0.22 0.14 0.08 NEW 24 15 02H
+0.03 0.54 0.51 0.03 24 16 02H
+0.06 0.3 0.3 0
NEW 24 17 04H
+0.09 0.36 0.26 0.1 NEW 24 18 02H
+0.03 0.5 0.5 0
24 18 03H
+0.03 0.31 0.19 0.12 NEW 24 18 04H
+0.09 0.54 0.17 0.37 NEW 24 18 06H
+0.00 0.36 0.36 0
NEW 24 18 07H
+0.09 0.51 0.35
__ 0.16 NEW i
24 19 02H
+0.06 0.29 0.2 0.09 NEW l
24 38 02H
-0.03 0.53 0.18 0.35 24 40 02H
+0.00 0.33 0.19 0.14 NEW 24 41 02H
-0.06
_0.32 0.19 0.13 NEW 24 87 03H
+0.00 0.59 0.27 0.32 NEW 24 98 02H
+0.00 0.29 0.37
-0.08 24 106 05H
+0.15 0.39 0.36 0.03 NEW 25 15 02H
+0.00 0.46 0.29 0.17 NEW 25 15 OSH
+0.06 0.34 0.26 0.08 NEW 25 16 02H
+0.03 0.45 0.45 0
25 18 02H
+0.03 0.42 0.21 0.21 NEW 25 23 02H
-0.03 0.24 0.3
-0.06 NEW 25 40 02H
-0.06 0.21 0.15 0.06 NEW 25 42 02H
-0.12 0.38 0.22 0.16 NEW 25 43 02H
+0.09 0.17 0.14 0.03 NEW 25 62
~ 02H
+0.06 0.7 0.25 0.45 NEW 25 64 02H
+0.03 0.31 1.22
-0.91 25 67 03H
+0.03 0.31 0.33
-0.02 25 73 02H
+0.03 0.82 0.74 0.08 PLUGGED 25 73 03H
+0.00 0.81 0.42 0.39 PLUGGED 25 73 06H
+ 0. 09 0.17 0.12 0.05 NEW/ PLUGGED 25 75 02H
-0.03 0.7 0.71
-0.01 25 88 02H
+0.03 1.43 0.76 0.67 Page 26 of 65 51-1245664-00
l TABLE 3-7 (Cont'd) 1 l
S/G D DSI's DETECTED IN 1RE06 l
l 1996 1995 CHANGE ROW COL LOCATION 1RE06 VOLTS 1RE05 VOLTS IN VOLTS COMMENTS 25 90 02H
+0.00 0.55 0.45 0.1 25 94 03H
-0.06 0.53 0.51 0.02 NEW 25 100 06H
-0.09 0.25 0.21 0.04 NEW 25 107 02H
+0.03 0.41 0.58
-0.17 NEW l
25 107 04H
+0.03 0.22 0.41
-0.19 NEW I
25 108 02H
+0.03 0.39 0.35 0.04 NEW 26 35 02H
+0.09 0.46 0.68
-0.22 l
26 41 02H
+0.06 0.37 0.21 0.16 NEW i
26 56 02H
-0.03 0.24 0.31
-0.07 NEW 26 62 02H
+0.06 0.29 0.32
-0.03 NEW I
26 64 02H
+0.03 0.62 0.64
-0.02 l
26 64 03H
+0.06 0.69 0.34 0.35 NEW 26 64 04H
+0.03 0.66 0.47 0.19 26 68 02H
+0.06 0.29 0.36
-0.07 26 72 02H
+ 0.12 0.41 0.27 0.14 NEW 26 84 02H
+0.00 0.52 0.55
-0.03 26 93 03H
-0.03 0.29 0.35
-0.06 NEW 26 97 02H
+0.03 0.58 0.77
-0.19 26 108 02H
+0.12 0.41 0.39 0.02 NEW 27 16 02H
+0.09 0.17 0.24
-0.07 NEW 27 31 02H
-0.12 0.42 0.2 0.22 NEW I
27 36 02H
+0.03 0.34 0.23 0.11 NEW 27 52 03H
-0.06 0.53 0.38 0.15 NEW 27 54 02H
-0.03 0.26 0.22 0.04 NEW i
27 64 02H
+0.06 0.48 0.35 0.13 27 68 02H
+0.12 0.34 0.3 0.04 NEW 27 68 03H
+0.06 0.43 0.37 0.06 NEW 27 73 02H
+0.00 1.47 0.82 0.65 27 76 07H
-0.06 0.37 0.12 0.25 NEW 27 78 02H
-0.09 0.51 0.17 0.34 NEW 27 100 04H
+0.09 0.26 0.11 0.15 NEW 27 104 03H
-0.09 0.46 0.42 0.04 NEW 27 105 04H
+0.03 0.5 0.62
-0.12 i
28 16 02H
+0.12 0.31 0.15 0.16 NEW 28 20 02H
+0.00 0.18
'O.09 0.09 NEW 28 66 02H
+0.06 0.63 0.7
-0.07 l
28 74 02H
+0.00 0.32 0.45
-0.13 l
28 75 02H
-0.06 0.43 0.34 0.09 NEW 28 88 02H
+0.03 0.49 0.26 0.23 NEW i
28 88 03H
-0.03 0.59 0.36 0.23 NEW i
28 92 03H
+0.09 0.31 0.31 0
NEW 29 20 02H
+0.00 0.2 0.22
-0.02 NEW
)
29 32
~ 02H
-0.09 0.6 0.34 0.26 1
29 39 02H
+0.03 0.33 0.14 0.19 NEW 29 41 03H
+0.03 0.3 0.22 0.08 NEW 29 43 02H
+0.09 0.29 0.26 0.03
)
29 69 07H
+0.00 0.36 0.21 0.15 NEW 29 70 02H
-0.03 0.33 0.19 0.14 NEW 29 72 02H
-0.06 0.34 0.32 0.02 1
29 78 02H
-0.09 0.34 0.34 0
NEW Page 27 of 65 51-1245664-00
n TABLE 3-7 (Cont'd)
S/G D DSI's DETECTED IN 1RE06 1996 1995 CHANGE ROW COL LOCATION 1RE06 VOLTS 1RE05 VOLTS IN VOLTS COMMENTS 29 78 03H
+0.00 0.41 0.14 0.27 NEW 29 99 03H
+0.06 0.25 0.36
-0.11 29 107 04H
+ 0.06 0.26-0.36
-0.1 29 111 02H
+0.06 0.32 0.26 0.06 f
30 10 02H
+0.00 0.23 0.38
-0.15 NEW 30 19 03H
+0.00 0.39 0.17 0.22 NEW 30 45 02H
-0.06 0.27 0.11 0.16 NEW 30 48 04H
-0.03 0.58 0.31 0.27 NEW 30 53 02H
-0.15 0.31 0.17 0.14 NEW 30 56 02H
+0.00 0.37 0.15 0.22 NEW 30 67 02H
+0.00 0.43 0.34 0.09 NEW 30 72 02H
-0.06 0.67 0.26 0.41 NEW 30 72 03H
-0.03 0.64 0.15 0.49 NEW 30 96 02H
+0.06 0.37 0.36 0.01 NEW 30 98 02H
+0.09 0.34 0.45
-0.11 30 100 02H
+0.06 0.41 0.39 0.02 NEW 30 103 02H
+ 0.12 0.37 0.24 0.13 30 103 03H
+0.09 0.43 0.45
-0.02 NEW 31 34 02H
+0.12 0.21 0.21 0
NEW 31 34 03H
+0.00 0.34 0.26 0.08 NEW 31 38 02H
-0.03 0.56 0.23 0.33 NEW 31 54 03H
+0.00 0.73 0.61 0.12 NEW 31 58 02H
+0.03 0.18 0.21
-0.03 NEW 31 65 02H
+0.03 0.3 0.23 0.07 31 71 02H
+0.06 0.28 0.13 0.15 NEW 31 71 03H
+0.00 0.21 0.21 0
NEW 31 71 06H
-0.03 0.1 0.13
-0.03 NEW 31 71 07H
+0.00 0.14 0.09 0.05 NEW 31 72 03H
+0.00 0.51 0.49 0.02 NEW 31 82 02H
+0.00 0.53 0.72
-0.19 32 17 02H
+0.06 0.51 0.19 0.32 NEW 32 22 02H
-0.03 0.3 0.17 0.13 NEW 32 40 02H
+0.06 0.53 0.11 0.42 NEW 32 53 03H
-0.09 0.5 0.36 0.14 NEW 32 87 03H
+0.03 0.38 0.21 0.17
{
32 96 02H
+ 0.06 0.27 0.23 0.04 NEW 32 97 02H
+ 0.06 0.32 0.31 0.01 NEW l
33 30 04H
+0.00 0.36 0.37
-0.01 NEW 33 30 07H
-0.03 0.26 0.27
-0.01 NEW 33 34 02H
+0.00 0.34 0.17 0.17 NEW 33 34 04H
+ 0.16 0.18 0.37
-0.19 33 34 05H
+0.03 0.24 0.11 0.13 NEW 33 38 02H
+ 0.06 0.25 0.25 0
NEW 33 94 02H
+ 0.15 0.5 0.5 0
t 34 19 02H
+0.03 0.8 0.62 0.18 34 52 03H
+0.06 0.33 0.24 0.09 NEW 34 62 02H
+ 0.06 0.21 0.25
-0.04 NEW 34 67 08H
+0.09 0.17 0.12 0.05 NEW 34 93 03H
+0.12 0.38 0.35 0.03 NEW 35 19 02H
+ 0.00 0.44 0.14 0.3 NEW Page 28 of 65 51-1245664-00 i
7 l
TABLE 3-7 (Cont'd)
SIG D DSI's DETECTED IN 1RE06 4
1996 1995 CHANGE ROW COL LOCATION 1RE06 VOLTS 1RE05 VOLTS IN VOLTS COMMENTS 35 19 03H
+0.03 0.5 0.53
-0.03 NEW 35 19 05H
+0.06 0.37 0.11 0.26 NEW 35 23 02H
+ 0.06 0.2 0.25
-0.05 NEW 35 34 03H
+0.06 0.28 0.12 0.16 NEW 35 44 07H
+0.15 0.21 0.25
-0.04 NEW l
35 83 02H
+ 0.06 0.23 0.14 0.09 l
35 88 04H
-0.03 0.37 0.31 0.06
)
35 91 04H
+ 0.03 0.23 0.4
-0.17 1
36 39 05H
+0.00 0.39 0.18 0.21 NEW 36 44 02H
+0.09 0.22 0.1 0.12 NEW i
36 73 02H
+0.03 0.3 0.31
-0.01 36 91 03H
+ 0.03 0.31 0.34
-0.03 NEW 36 99 02H
+0.09 0.53 0.55
-0.02 NEW 37 17 02H
+0.03 0.44 0.45
-0.01 NEW 37 29 02H
-0.03 0.21 0.19 0.02 NEW 37 31 02H
-0.03 0.54 0.14 0.4 NEW 37 32 02H
+0.09 1.58 0.98 0.6 37 85 03H
+0.09 0.68 0.54 0.14 NEW i
37 87 03H
+0.00 0.49 0.45 0.04 37 90 02H
+0.00 0.87 0.66 0.21 37 96 02H
+0.09 0.28 0.22 0.06 NEW l
37 100 02H
+ 0.06 0.39 0.31 0.08 NEW i
j 37 100 04H
+0.09 0.27 0.37
-0.1 NEW 38 32 03H
+0.03 0.35 0.32 0.03 NEW 38 37 04H
-0.09 0.34 0.12 0.22 NEW l
38 75 02H
-0.03 0.25 0.15 0.1 NEW l
39 28 07H
+0.06 0.27 0.07 0.2 NEW 39 55 04H
+0.06 0.29 0.13 0.16 NEW l
39 64 05H
-0.12 0.35 0.22 0.13 39 64 07H
-0.09 0.34 0.15 0.19 39 72 02H
+0.03 0.2 0.2 0
NEW 39 82 02H
+0.03 0.59 0.73
-0.14 39 89 02H
-0.03 0.36 0.36 0
NEW 41 94 04H
+0.09 0.27 0.32
-0.05 NEW l
44 45 02H
-0.06 0.22 0.14 0.08 NEW l
t l
Page 29 of 65 51-1245664-00
~,
l a
s i
4.0 Bobbin Voltage Distributions This section provides the voltage distributions used in the leak rate and probability of burst calculations as well as the projected end-of-cycle 7 (EOC7) distributions. These distributions are provided in both tabular and graphical formats at the end of this section of the report. For i
the voltage distribution graphs, the voltage values shown on the x-axis are the upper limits l
for that particular bin. For example, a 0.9 volt bin would contain indications ranging from 0.81 to 0.90 volts inclusive.
4.1 EOC6 Voltage Distributions The voltages for the DSI's detected during the IRE 06 inspection were binned in 0.1 volt increments. The "as-found" voltage distributions used in the determination of the beginning of cycle 7 (BOC7) distributions are shown in Tables 4-1 through 4-5 and Figures 4-1 through 4-5.
4.2 Repaired Indications The voltage distributions for repaired indications are provided in Tables 4-1 through 4-5 and Figures 4-6 through 4-10. The repaired indications category includes indications in tubes which were repaired for reasons other than ODSCC at the TSP's. A total of 10 DSI's were removed from service during IRE 06. Only one of these indications, however, was removed from service due to ODSCC at the support plate. The other nine indications were removed from service due to other reasons.
4.3 DSI's Left In Service The voltage distributions for the DSI's which were left in service are shown in Tables 4-1 through 4-5 and Figures 4-11 through 4-16. This distribution includes the DSI's detected during the 1RE06 inspection (Section 4.1)less the repaired indications (Section 4.2)
The Generic Letter also requires that the distribution of the DSI's which were left in service and were also confirmed by RPC to be crack-like or were not inspected with RPC be provided in this report. These distributions are provided in Tables 4-1 through 4 5 and Figures 4-16 through 4-20. Since all of the DSI's greater than 1.0 volt were inspected with RPC, no indications greater than 1.0 volt are included in this distribution.
l l
Page 30 of 65 51-1245664-00
I A
l 4.4 BOC7 Voltage Distributions To determine the BOC7 voltage distributions, the EOC6 as found distributions were adjusted to account for the probability of detection (POD) and the tubes which were removed from service. The POD is a ratio of the indications detected to the total number ofindications present. The POD, thus, accounts for those indications which may not have been detected during the bobbin inspection. In accordance with the Generic Letter, a POD of 0.6 was used t
in the determination of the BOC7 voltage distribution. The number ofindications in each of the EOC6 as found voltage bins was divided by the POD of 0.6 to give the total number of indications assumed to be present. This number was then reduced by the number of i
indications which were removed from service. This relationship is shown as Equation 4-1 below.
N EOC6 _y y
soc 7 pgg ny ua 1
Eq. 4-1 The number ofindications being repaired includes those indications in tubes which are being l
repaired for other reasons such as top-of-tubesheet degradation. The resulting BOC7 distributions are shown in Tables 4-1 through 4-5 and Figures 4-21 through 4-25.
i l
4.5 Voltage Growth Distributions As discussed in Section 3.2, an analysis was performed to determine the growth of the DSI's for Cycle 6. In accordance with the Generic Letter, voltage growth rates were only evaluated for those intersections at which bobbin indications could be identified at both the 1RE05 and 1RE06 inspections. The actual growth values were divided by the Cycle 6 operating interval of 1.059 EFPY to obtain growth values in terms of delta volts per EFPY. These corrected growth values were then binned in 0.1 volt increments. For the purposes of the tube integrity calculations, the negative growth values were included as zero growth rates as required by the Generic Letter. These growth distributions are shown in Table 4-6 and Figures 4-26 through 4-30.
Since some of the steam generators had less than 200 indications for use in the growth distribution, a conservative bounding distribution was used for the tube integrity calculations.
This bounding distribution was applied to all four generators in lieu of using generator-specific growth distributions. In order to develop a bounding distribution, the growth distributions for each steam generator must be put into a format which will allow comparisons l
among the steam generators. For this reason, the growth distribution for each steam generator l
was put into a cumulative percent format. The cumulative percent growth values are shown in Table 4-6. These values correspond to the percentage ofindications which have voltages less than or equal to the voltage associated with a particular bin. Therefore, for a particular 1
Page 31 of 65 51-1245664-00
i l
voltage bin, the steam generator with the lowest cumulative percent would have the highest percentage of indications showing growth greater than that particular voltage. For each voltage bin, the bounding distribution incorporates the lowest cumulative percent among the four steam generators. The bounding growth distribution is shown in Table 4-6 and Figure 4-31.
{
l 4.6 NDE Uncertainty Distributions I
NDE uncertainties must be taken into account when projecting the end-of-cycle voltages for the next operating cycle. The NDE uncertainties used in the calculations of the EOC7 voltages are described in Reference 7.1. The acquisition uncertainty was sampled from a normal distribution with a mean of zero, a standard deviation of 7%, and a cutofflimit of 15%. This 15% limit is based on the use of the probe wear standard and the fact that probes are replaced when the voltage measurements on the probe wear standard differ by more than 15% compared to the measurement when the probe was new. The analyst uncertainty was sampled from a normal distribution with a mean of zero, a standard deviation of 10.3%, and i
no cutofflimit. These uncertainty distributions are provided in Table 4-7 and Figure 4-32.
i 4.7 Projected EOC7 Voltage Distributions
{
The EOC7 voltage distributions were obtained by applying a monte carlo sampling process to the BOC7 voltages. Thi3 process randomly assigns uncertainty values and a growth value to each of the BOC7 indications. Since the growth distribution derived in Section 4.5 is in terms of delta volts per EFPY, the growth values from this distribution must be corrected for the expected length of Cycle 7. Therefore, the growth values are multiplied by the expected cycle length of 1.353 EFPY. This random sampling process was performed for each BOC7 indication in the steam generator resulting in an EOC7 voltage for each BOC7 indication.
Each sampling of all of the BOC7 indications in a steam generator is called a ' trial'. Many trials were performed and the resulting EOC7 voltages were binned in 0.1 volt increments.
The resulting bin values were then divided by the number of trials which were performed to obtain the average number of EOC7 indications per trial in each voltage bin. The projected EOC7 voltage distributions shown in Table 4-8 and Figures '4-33 through 4-37 are based on 1 x 10' trials.
Page 32 of 65 51-1245664-00
Table 4-1 EOC6 And BOC7 Voltage Distributions For S/G A DSI's Returned To Service Voltage
.EOC6 With 0.6 POD Crack-Like or Bin As Found Applied Plugged BOC7 Not insp w/ RPC Total 0.0-0.1 3
5.0 0
5.0 3
3 0.11-0.2 23 38.3 0
38.3 23 23 0.21-0.3 29 48.3 0
48.3 29 29 0.31-0.4 44 73.3 0
73.3 43 44 0.41-0.5 26 43.3 0
43.3 26 26 0.51-0.6 24 40.0 0
40.0 24 24 0.61-0.7 13 21.7 0
21.7 13 13 0.71-0.8 2
3.3 0
3.3 2
2 0.81-0.9 4
6.7 0
6.7 4
4 l
0.91-1.0 3
5.0 0
5.0 3
3 t
1.01-1.1 0
0.0 0
0.0 0
0 1.11-1.2 0
0.0 0
0.0 0
0 1.21-1.3 0
0.0 0
0.0 0
0 l
1.31-1.4 0
0.0 0
0.0 0
0 i
1.41-1.5 0
0.0 0
0.0 0
0 1.51-1.6 0
0.0 0
0.0 0
0 I
> 1.6 0
0.0 0
0.0 0
0 Total 171 285.0 0
285.0 170 171 l
l Table 4-2 EOC6 And BOC7 Voltage Distributions For SIG B DSI's Returned To Service Voltage EOC6 With 0.6 POD Crack-Like or Bin As Found Applied Plugged BOC7 Not insp w/ RPC Total 0.0-0.1 0
0.0 0
0.0 0
0 0 11-0.2 16 26.7 1
25.7 15 15 0.21-0.3 35 58.3 0
58.3 35 35 0.31-0.4 25 41.7 1
40.7 24 24 0.41-0.5 19 31.7 0
31.7 19 19 0.51-0.6 16 26.7 0
26.7 16 16 0.61-0.7 5
8.3 0
8.3 5
5 0.71-0.8 5
8.3 0
8.3 5
5 0.81-0.9 1
1.7 0
1.7 1
1 0.91-1.0 2
3.3 0
3.3 2
2 1.01-1.1 0
0.0 0
0.0 0
0 1.11-1.2 0
0.0 0
0.0 0
0 1.21-1.3 0
0.0 0
0.0 0
0 1.31-1.4 0
0.0 0
0.0 0
0 1.41-1.5 1
1.7 1
0.7 0
0 l
1.51-1.6 0
0.0 0
0.0 0
0
> 1.6 0
0.0 0
0.0 0
0 l
Total 125 208.3 3
205.3 122 122 4
Page 33 of 65 51-1245664-00
Table 4-3 l
EOC6 And BOC7 Voltage Distributions For S/G C DSl's Returned To Service Voltage EOC6 With 0.6 POD Crack-Like or Bin As Found Applied Plugged BOC7 Not insp w/ RPC Total 0.0-0.1 0
0.0 0
0.0 0
0 0.11-0.2 98 163.3 0
163.3 98 98 0.21-0.3 113 188.3 2
186.3 111 111 0.31-0.4 94 156.7 1
155.7 93 93 0.41-0.5 64 106.7 0
106.7 64 64 l
0.51-0.6 24 40.0 0
40.0 24 24 0.61-0.7 21 35.0 1
34.0 20 20 0.71-0.8 15 25.0 0
25.0 15 15 0.81-0.9 9
15.0 0
15.0 9
9 0.91-1.0 2
3.3 0
3.3 2
2 l
1.01-1.1 0
0.0 0
0.0 0
0 1.11-1.2 0
0.0 0
0.0 0
0 1.21-1.3 0
0.0 0
0.0 0
0 1.31-1.4 1
1.7 0
1.7 0
1 1.41-1.5 0
0.0 0
0.0 0
0 1.51-1.6 1
1.7 0
1.7 0
1
> 1.6 0
0.0 0
0.0 0
0 Total 442 736.7 4
732.7 436 438 Table 4-4 EOC6 And BOC7 Voltage Distributions For S/G D DSI's Returned To Service Voltage EOC6 With 0.6 POD Crack-Like or Bin As Found Applied Plugged BOC7 Not insp w/ RPC Total 0.0-0.1 3
5.0 0
5.0 3
3 0.11-0.2 27 45.0 1
44.0 26 26 0.21-0.3 78 130.0 0
130.0 78 78 0.31-0.4 79 131.7 0
131.7 79 79 0.41-0.5 40 66.7 0
66.7 40 40 0.51-0.6 32 53.3 0
53.3 32 32 0.61-0.7 15 25.0 0
25.0 15 15 0.71-0.8 4
6.7 0
6.7 4
4 0.81-0.9 4
6.7 2
4.7 2
2 0.91-1.0 0
0.0 0
0.0 0
0 1.01-1.1 0
0.0 0
0.0 0
0 1.11-1.2 0
0.0 0
0.0 0
0 1.21-1.3 0
0.0 0
0.0 0
0 1.31-1.4 0
0.0 0
0.0 0
0 1.41-1.5 2
3.3 0
3.3 0
2 1.51-1.6 1
1.7 0
1.7 0
1
> 1.6 0
0.0 0
0.0 0
0 Total 285 475.0 3
472.0 279 282 i
l Page 34 of 65 51-1245664-00
l l
l l
Table 4-5 EOC6 And BOC7 Voltage Distributions For All SIG's Combined DSI's Returned To Service Voltage EOC6 With 0.6 POD Crack-Like or Bin As Found Applied Plugged BOC7 Not insp w/ RPC Total 0.0-0.1 6
10.0 0
10.0 6
6 0.11-0.2 164 273.3 2
271.3 162 162 0.21-0.3 255 425.0 2
423.0 253 253 0.31-0.4 242 403.3 2
401.3 239 240 l
0.41-0.5 149 248.3 0
248.3 149 149 0.51-0.6 96 160.0 0
160.0 96 96 0.61-0.7 54 90.0 1
89.0 53 53 0.71-0.8 26 43.3 0
43.3 26 26 0.81-0.9 18 30.0 2
28.0 16 16 0.91-1.0 7
11.7 0
11.7 7
7 1.01-1.1 0
0.0 0
0.0 0
0 1.11-1.2 0
0.0 0
0.0 0
0 1.21-1.3 0
0.0 0
0.0 0
0 1.31-1.4 1
1.7 0
1.7 0
1 1.41-1.5 3
5.0 1
4.0 0
2 1.51-1.6 2
3.3 0
3.3 0
2
> 1.6 0
0.0 0
0.0 0
0
]iotal 1023 1705.0 10 1695.0 1007 1013 i
Page 35 of 65 51-1245664-00
f 1
l i
Table 4-6 Voltage Growth Distributions Voltage Growth Number of Indications Cumulative Percent Per EFPY A
B C
D A
B C
D Bounding
<=0.0 68 30 173 94 40.0 24.0 39.5 33.0 24.0 0.01-0.1 48 34 176 80 68.2 51.2 79.7 61.1 51.2 0.11-0.2 33 36 62 71 87.6 80.0 93.8 86.0 80.0 i
0.21-0.3 15 13 19 19, 96.5 90.4 98.2 92.6 90.4 0.31-0.4 4
9 5
14 98.8 97.6 99.3 97.5 97.5 0.41-0.5 1
2 2
3 99.4 99.2 99.8 98.6 98.6 0.51-0.6 0
0 0
2 99.4 99.2 99.8
-99.3 99.2 0.61-0.7 1
1 0
2 100.0 100.0 99.8 100.0 99.8 0.71-0.8 0
0 0
0 100.0 100.0 99.8 100.0 99.8 0.81-0.9 0
0 0
0 100.0 100.0 99.8 100.0 99.8 0.91-1.0 0
0 1
0 100.0 100.0 100.0 100.0 100.0 1.01-1.1 0
0 0
0 100.0 100.0 100.0 100.0 100.0 1.11-1.2 0
0 0
0 100.0 100.0 100.0 100.0 100.0 1.21-1.3 0
0 0
0 100.0 100.0 100.0 100.0 100.0 i
1.31-1.4 0
0 0
0 100.0 100.0 100.0 100.0 100.0 1.41-1.5 0
0 0
0 100.0 100.0 100.0 100.0 100.0
> 1.5 0
0 0
0 100.0 100.0 100.0 100.0 100.0 Total 170 125 438 285 I
l l
I l
i i
Page 36 of 65 51-1245664-00
D 4
8 Table 4-7 NDE Uncertainty Values Analyst Uncertainty Acquisition uncertainty Percent Cumulative Percent Cumulative Variation Probability Variation Probability
-40.0%
0.00005
<-15.0%
0.00000 l
-38.0%
0.00011
-15.0%
0.01606 I
-36.0%
0.00024
-14.0%
0.02275
-34.0%
0.00048
-13.0%
0.03165 l
-32.0%
0.00095
-12.0%
0.04324 l
-30.0%
0.00179
-11.0%
0.05804
-28.0%
0.00328
-10.0%
0.07656
-26.0%
0.00580
-9.0%
0.09927
-24.0%
0.00990
-8.0%
0.12655
-22.0%
0.01634
-7.0%
0.15866
-20.0%
0.02608
-6.0%
0.19568
-18.0%
0.04027
-5.0%
0.23753
-16.0%
0.06016
-4.0%
0.28385
-14.0%
0.08704
-3.0%
0.33412
-12.0%
0.12200
-2.0%
0.38755
-10.0%
0.16581
-1.0%
0.44320
-8.0%
0.21667 0.0%
0.50000
-6.0%
0.28011 1.0%
0.55680
-4.0%
0.34888 2.0%
0.61245
-2.0%
0.42302 3.0%
0.66588 l
0.0%
0.50000 4.0%
0.71615
~
2.0%
0.57698 5.0%
0.76247 i
4.0%
0.65112 6.0%
0.80432 6.0%
0.71989 7.0%
0.84134 8.0%
0.78133 8.0%
0.87345 10.0 %
0.83419 9.0%
0.90073 12.0 %
0.87800 10.0%
0.92344 14.0 %
0.91296 11.0 %
0.94196 16.0%
0.93984 12.0 %
095676 18.0 %
0.95973 13.0 %
0.96835 20.0%
0.97392 14.0 %
0.97725 22.0 %
0.98366 15.0%
0.98394 24.0 %
0.99010
>15.0%
1.00000 26.0 %
0.99420 28.0%
0.99672 Std Deviation = 7.0%
30.0 %
0.99821 Mean = 0.0%
32.0 %
0.99905 Cutoff = +/- 15.0%
34.0 %
0.99952 36.0 %
0.99976 38.0 %
0.99989 40.0%
0.99995 Std Deviation = 10.3%
Mean = 0.0%
No Cutoff Page 37 of 65 51-1245664-00
Table 4-8 Projected EOC7 Voltage Distributions Voltage Projected No. Of Indications At EOC7 Bin S/G A S/G B S/G C S/G D Total 0.0-0.1 0.6 0.0 0.0 0.6 1.3 0.11-0.2 6.8 3.5 22.4 7.6 40.3 0.21-0.3 19.5 16.2 75.8 33.2 144.6 0.31-0.4 34.0 28.2 111.2 67.3 240.7 0.41-0.5 44.2 33.0 126.5 81.8 285.5 O.51-0.0 45.0 33.0 112.0 79.9 269.9 0.61-0.7 40.8 27.9 89.4 66.5 224.6 0.71-0.8 31.7 21.8 67.1 49.5 170.1 0.81-0.9 22.9 15.4 46.7 33.8 118.9 0.91-1.0 15.3 10.1 31.0 20.5 76.9 1.01-1.1 9.6 6.4 19.6 11.7 47.5 1.11-1.2 6.0 3.9 12.0 6.6 28.6 1.21-1.3 3.5 2.3 7.1 3.7 16.6 1.31-1.4 2.0 1.3 4.0 2.1 9.4 1
1.41-1.5 1.1 0.8 2.5 1.5 5.9 1.51-1.6 0.6 0.5 1.8 1.4 4.3 1.61-1.7 0.4 0.4 1.3 1.2 3.3 1.71-1.8 0.2 0.2 0.9 1.0 2.4 1.81-1.9 0.1 0.2 0.6 0.7 1.6 1.91-2.0 0.1 0.1 0.4 0.5 1.1 2.01-2.1 0.0 0.1 0.2 0.3 0.7 2.11-2.2 0.0 0.0 0.2 0.2 0.4 2.21-2.3 0.0 0.0 0.1 0.1 0.2 2.31-2.4 0.0 0.0 0.0 0.1 0.1 3
2.41 2.5 0.0 0.0 0.0 0.0 0.1 2.51-2.6 0.0 0.0 0.0 0.0 0.0 2.61-2.7 0.0 0.0 0.0 0.0 0.0 2.71-2.8 0.0 0.0 0.0 0.0 0.0 2.81-2.9 0.0 0.0 0.0 0.0 0.0 2.91 3.0 0.0 0.0 0.0 0.0 0.0
>3.0 0.0 0.0 0.0 0.0 0.0 Total 285.0 205.3 732.7 472.0 1695.0 i
l l
4 l
Page 38 of 65 51-1245664-00 1
i l
f Figure 4-1 i
i As Found DSI Population STP-1 S/G A 05/961RE06 120 i
100 Eo
% 80 i
o 60 o
b i
$4 20 0-Ja.
m
==
i 0.10.20.30.40.50.60.70.80.9 1 1.11.21.31.41.51.61.71.8 Bobbin Volts Figure 4-2 As Found DSI Population STP-1 S/G B 05/961RE06 100 E
% 80 d
1 h 60 o
5y 40 20 0
_E_R. _,
0.10.20.30.40.50.60.70.80.9 1 1.11.21.31.41.51.61.71.8 Bobbin Volts Page 39 of 65 51-1245664-00
,1 1
Figure 4-3 3
As Found DSI Population l
STP-1 S/G C 05/961RE06 j
120 100 E
j k 80 i
$ 60 O
by 40 20 0
E 0.10.20.30.40.50.60.70.80.9 1 1.11.21.31.41.51.61.71.8 Bobbin Volts i
j Figure 4-4 As Found DSI Population l
STP-1 S/G D 05/961RE06
,20 i
100 E
h 80 e
$ 60 O
by 40
]
20
~
~~g~
'0$ 0.2' O.3 0.4 0.5 0.6 0.7 0 1.1 1.2 1.3 1.4 US U6 1.7 1.8 09 1 2
Bobbin Volts i
Page 40 of 65 51-1245664-00
Figure 4-5 As Found DSI Population STP-1 ALL S/G's 05/961RE06 300 250 E
' 200 1-- 150 100 50
~~
~~
1.1 1.2 1.3 1.4 I5 1 A 1.7 1.8 0
0.2 0.3 0.4 0.5 0.6 0.7 0 09 Bobbin Volts Page 41 of 65 51-1245664-00
g O
Figure 4-6 Repaired DSis STP-1 SIG A 05/961RE06 5
.)4 b
% 3 2
8 No DSI's were removed from service in S/G A.
o2 0
.o Es1 Z
0 0.10.20.30.40.50.60.70.80.9 1 1.1 1.21.31.41.51.61.71.8 Bobbin Volts Figure 4-7 Repaired DSis STP-1 S/G B 05/961RE06 5
}4 8
0
% 3
.!2 en O
"o 2 b
.o Ea1 4
0 0.10.20.30.40.50.60.70.80.9 1 1.11.21.31.41.51.61.71.8 Bobbin Volts Page 42 of 65 51-1245664-00
l Figure 4-8 Repaired DSis STP-1 S/G C 05/961RE06 5
)4
's O
% 3 m
w Q
"o 2 b
n Eo1 Z
0 0.10.20.30.40.50.60.70.80.9 1 1.11.21.31.41.51.61.71.8 Bobbin Volts Figure 4-9 Repaired DSis STP-1 S/G D 05/961RE06 5
l
\\
)4
- 8 l
e Z
3
_m_
m O
o2 b
n E
l c1 Z
0 0.10.20.30.40.50.60.70.80.9 1 1.11.21.31.41.51.61.71.8
~
Bobbin Volts Page 43 of 65 51-1245664-00
3 l
i i
l i
4 b
\\
l l
i Figure 4-10
]
Repaired DSis STP-1 All SIG's 05/961RE06 5
i l
3 o
I i
a4 4
.h:
i 2
cc i
i o.
1, j
W I
% 3 1
2 m
1 (o
i 1
o 2
I j
o i
5 i
o i
E i
a1 l
Z 4
0 3,
0.1 0.2 0.3 0.4 0.5 0.6 0.7,0.8 0.9 1 1.1 1.2 1.2 ~ 1.4 1.5 1.6 1.7 1.8 l
Bobbin Volts i
i i
i i
s i
i i
}
i i
i 4
Page 44 of 65 51-1245664-00 J
e
Figure 4-11 DSis Returned To Service STP-1 S/G A 05/961RE06 120 l
100
% 80
- 60 l
O b
l o 40 E
I j
20 0- mm--
-.it mm 0.1 0.2 0.
.40.50.60.70.80.9 1 1.11.21.31.41.51.61.71.8 Bobbin Volts l
l Figure 4-12 l
DSis Returned To Service STP-1 S/G B 05/961RE06 l
120 i
100 l
% 80 i
.s?
E 60 t
i O
l b
l o 40 l
E itLI L 20 e
0.10.20.30.4'O.50.60.70.8'O.9 1 1.11.21.31.41.51.61.71.8 Bobbin Volts l
Page 45 of 65 51-1245664-00
l Figure 4-13 l
DSis Retumed To Service STP-1 S/G C 05/961RE06 120 100 E
i k 80 i
$ 60 O
O y 40 i
S 20 j
0 E
0.10.20.30.40.50.60.7*0.80.9 1 1.11.21.31.41.51.61.71.8 i
Bobbin Volts Figure 4-14 DSis Retumed To Service 1
STP-1 S/G D 05/961RE06 120 i
i i
100 l
E l
80
- 60 8
?
40 I
b i
Z j
20 k
I O-M
-4 M -
1 0.10.20.30.40.50.60.70.80.9 1 1.11.21.31.41.51.61.71.8 j
Bobbin Volts J
i J
Page 46 of 65 51-1245664-00
. - ~, _ - - - _. _ -
l 4
i 1
1
}
i l
t t
j Figure 4-15
{
DSis Returned To Service i
STP-1 All S/G's 05/961RE06 l
300 i
1 250 i
a i
E
'g200 E
l
$150 o
i Ei l
p100 l
Z
{
50 a
0-m-E-m 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.11.21.31.41.5'1.61.71.8 Bobbin Volts
!i i
i 1
1 i
1 4
j Page 47 of 65 51-1245664-00
l.
Figure 4-16 l
DSis Returned To Service Confirmed As Crack-Like or Not inspected w/ MRPC STP-1 S/G A 05/961RE06 120 100 i
E l
80 5
3 60 O
Eio 40 5
1 z
20 0-mm mus_m 0.10.20.30.40.50.60.70.80.9 1 1.11.21.31.41.51.61.71.8 Bobbin Volts Figure 4-17 DSis Returned To Service Confirmed As Crack-Like or Not inspected w/ MRPC STP-1 S/G B 05/961RE06 g
100 8
% 80
- 60 8
E 40 b
20 l
0
__KA 0.10.20.30.40.50.60.70.80.9 1 1.11.21.31.41.51.61.71.8 l
Bobbin Volts i
Page 48 of 65 51-1245664-00 l
Figure 4-18 DSis Returned To Sentice Confirmed As Crack-Like or Not inspected w/ MRPC STP-1 S/G C 05/961RE06 120 100 8
% 80 60 O
O g 40 20 0
E 0.10.20.30.40.50.60.70.80.9 1 1.11.21.31.41.51.61.71.8 Bobbin Volts Figure 4-19 DSIs Returned To Service Confirmed As Crack-Like or Not inspected w/ MRPC STP-1 S/G D 05/961RE06 120 100 E
O
% 80 5
$ 60 O
Og 40 20 0- sma-
- un -
0.10.20.30.40.50.60.70.80.9 1 1.11.21.31.41.51.61.71.8 Bobbin Volts Page 49 of 65 51-1245664-00
k i
3 i
o i
i j
4 1
Figure 4-20 DSis Returned To Service Confirmed As Crack-Like or Not inspected w/ MRPC i
STP-1 All S/G's 05/961RE06 i
300 1
1' j
250 E
200
?
-- 150 1
0 E3 i
o 100 i
E J
aZ ~ 50 0- A
=
E
=
j 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.21.31.41.51.61.71.8
{
Bobbin Volts i
l 3
i l
l i
1 i
Page 50 of 65 51-1245664-00
1 j
i i
Figure 4-21 j
BOC7 DSI Population STP-1 S/G A l
200 i
j 150
)
i I
E g100 j
0 l
50 i
i i
0- at mm j
0.10.20.30.40.50.60.70.80.9 1 1.11.21.31.41.51.61.71.81.9 2 Voltage Bins i
i j
Figure 4-22 BOC7 DSI Population i
STP-1 S/G B 200 i
l 150 m
y100 O
l 1
50 I- -I-i MR-E-E 0
-=
0.10.20.30.40.50.60.70.80.9 1 1.1 1.21.31.4'1.51.61.71.8 Voltage Bins Page 51 of 65 51-1245664-00
1 j
s-1 4
i Figure 4-23 BOC7 DSI Population STP-1 S/G C 200 150 E
g100 l
U 50 E
o 1
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.11.21.31.41.51.61.71.8 i
Voltage Bins Figure 4-24 i
1 i
BOC7 DSI Population STP-1 S/G D l
200 l
4 150
~
g100 O
a 50 M--
m
=
0,O.10.20.30.40.50.60.70.80.9'i
==.
e 1.11.21.31.41.51.61.71.8 i
Voltage Bins i
l Page 52 of 65 51-1245664-00 1
2 i
i i
l l
i 1
j Figure 4-25 j
BOC7 DSI Population STP-1 All S/G's j
500 i
j 400 1
i l
300 l
E 200 l
l' j
100 0-E 0.1 0.2'O.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.21.31.41.51.61.71.8 Voltage Bins i
l i
i i
i Page 53 of 65 51-1245664-00
a e
O Figure 4-26 Growth Of DSis STP-1 S/G A 03/95 to 05/96 70 60 -
- -4 l
E j
l i
.g 50 -
.0 l
u 40
+
5 i
i o 30 __
f :_
b
-E 20 -
I z
l l
10 p-1 l
i 0--
i E
.1 0
~
.1 0.20.3 0.4 0.50.6'O.70.80.9 1
0 1
1.2 1.3 1.4 1.5 Voltage Growth /EFPY Figure 4-27 Growth Of DSis STP-1 S/G B 03/95 to 05/96 40 I
a E 30 --
l I
i l
l i
i i
- 20 I
o i
310
=-
~
i
,t 1
.,K V
?
0 L
==
. - - - - - +
0 0.1 0.20.3 0.4 0.50.60.70.80.9 1
1.1 1.2 1.3 1.4 1.5
_t Voltage Growth /EFPY Page 54 of 65 51-1245664-00 w
\\
I t
Figure 4-28 Growth Of DSis STP-1 S/G C 03/95 to 05/96 200 7 --
r i
j
)
._ d I
I I
$150
.a i
8 I
'5 100-a
.o E
l 3 50 Z
l
~
~
1
.i i
0-ME4m -
l 0 01 0.20.3 0.4 0.50.60.7 0.80.9 1
1.1 1.2 1.3 ' 1.4 1.5 Voltage Growth /EFPY l
Figure 4-29 Growth Of DSis STP-1 S/G D 03/95 to 05/96 100 l
1 f
80 m
c.'
C I
.g
.m f 60
_C O
g 40
+
.a E
l Z 20 -.
- s:
i - - -
7 1 '1 R-
= _.
.j l
i 0i',
um_
4 w
0 0.1 ' O.2 -
0.3 0.4 0.5 0.60.70.80.9 1
1.1 1.2 1.3 1.4 1.5 Voltage Growth /EFPY Page 55 of 65 51-1245664-00
i Figure 4-30 Growth Of DSis STP-1 All S/G's 03/95 to 05/96 400
$ 300 -
=
.E
- 200 -
o N
.O E
y 100 -
E 0-R
=
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.11.21.31.41.5 Voltage Growth /EFPY Figure 4-31 Cumulative Growth Distribution STP-1 All S/Gs 03/95 to 05/96 100
[.[
b 80 di t/
\\
60 U.
I a
e
//
s 40 pf_ ;
z i
E i
j 20 '
O O 0.10.20.30.40.50.60.70.80.9 1
1.1 1.2 1.3 1.4 1.5 Voltage Growth /EFPY
+ A-S/G
-+- B-S/G m C-S/G
-x-D-S/G Bounding i
Page 56 of 65 51-1245664-00
I l
l l
Figure 4-32 NDE UNCERTAINTY DISTRIBUTIONS 1
l l
[~
~~
I O.8 l
l
[, '
3 i
j /' '
l 2
i['
80.6 i
i
/
i' 1
8 i'
g 0.4 --
il l
3
,/.
./
0.2 U
'//
l 0
- - 'W
-40%
-30%
-20%
-10%
0%
10%
20%
30%
40%
Percent Variation in Voltage i
- - Analyst Uncertainty Acquisition Uncertainty l
l I
l i
i l
Page 57 of 65 51-1245664-00 l
i Figure 4-33 1
l Projected EOC7 DSI Population j
STP-1 S/G A 140 -
4 1
i r-r--
1 t
I i
120 LJ l
100 i
i 80 -.
-c i
i l
i o
O 60 I
l 40 9
i 20 E 4a._r.-_
O-E.
0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9
.2.1 2.3.
l 2.5 2.7 2.9
>3 1
0.2 0.4 0.6 0.8 1
1.2 1.4 1.6 1.8 2
2.2 2.4 2.6 2.8 3
l Voltage Bins i
l Figure 4-34 l
Projected EOC7 DSI Population STP-1 S/G B l
140 i
I 120 M
i I
I l'
t i
j 100 t
y 80 ----
i 8O 60 i
l i
I 40 I
-4
}
l --
l t i i,
20 1
03 " 0.3 1IS U U ~2.1 2.3 2IS 2I7
'I9 ~ >3' 0.5 0.7 0.9 11 13 2
i 0.2 0.4 0.6 0.8 1
1.2 1.4 1.6 1.8 2
2.2 24 2.6 2.8 3
Voltage Bins Page 58 of 65 51-1245664-00
I Figure 4-35 I
Projected EOC7 DSI Population STP-1 S/G C 140 I
l I
120 t
100 l
I g 80 l
l
+
8 I
i O 60 i
I 40 20 --
l Il id i 0.1 0.3 0.5 0.7 0.9
'1 1 13 15 1I7 159 2.1 2.3 2.5 2.7 23 0.2 0.4 0.6 0.8 1
1.2 1.4 1.6 1.8 2
2.2 2.4 2.6 2.8 3
Voltage Bins Figure 4-36 Projected EOC7 DSI Population STP-1 S/G D 140 ---
{
i I
120 100 I
l l
80 o
O 60 3
l i
20.-
- l
.Il l
l 40 -__-
1
- _. - -~-
i t
y 153 175 177' 79 2It 2I3 55 2I7
~ T1 0.3 0.5 0.7
'0.9 11 0
~ I9
>3
~
1 2
02 0.4 0.6 0.8 1
1.2 14 1.6 1.8 2
2.2 2.4 2.6 28 3
Voltage Bins Page 59 of 65 51-1245664-00
Figure 4-37 Projected EOC7 DSi Population STP-1 All S/G's 3oo
\\
1 250
\\
\\
\\
i 200
\\
\\
i u
i
\\
g150 0
\\
\\
i 1
100
~
\\
\\
\\
50 s
R_'
k
\\
0 -
'~
8 t55 ' ?Y i 9 o1 0.3 0.5' 1
1 2
2.9 43 06 0.8 3
2 2 '2.2 '2A 2.6 '72.8 3
oltage Bi s i
i i
i J
q Page 60 of 65 51-1245664-00
)
I
j I
e 5.0 Tube Integrity Evaluation Per the Generic Letter, an evaluation should be performed to confirm that the tubes will retain adequate structural and leakage integrity until the next scheduled inspection. The first portion of this evaluation is the calculation of the conditional probability of burst for a steam generator under main steam line break (MSLB) conditions. This conditional probability of burst refers to the probability that the burst pressures associated with one or more indications in the faulted steam generator will be less than the maximum pressure differential associated with a postulated MSLB assumed to occur at the end of the next operating cycle. The second portion of this evaluation is the calculation of the total leak rate from the affected steam generator during a postulated MSLB occurring at the end of the next operating cycle. This leak rate calculation is intended to ensure that the total leak rate would be less than a rate th could lead to radiological releases in excess of the licensing basis for the plant.
The methodology used by FTI to perform these calculations involves a monte carlo sampling process. This process uses the BOC7 voltage distribution discussed in Section 4.4 and the bounding growth distribution discussed in Section 4.5. This process accounts for voltage growth due to defect progression, NDE uncertainties, and the uncertainties associated with the burst pressure and leak rate correlations. This methodology is documented in Reference 7.1 and has been approved by the NRC (Reference 7.6).
5.1 Conditional Probability of Burst The conditional probability of burst was calculated for each steam generator using the FTI program STDPOB.EXE. The inputs used in the program include the BOC voltage distributions (Tables 4-1 through 4-4), the bounding growth distribution (Table 4-6), and the burst pressure versus voltage correlation parameters (Equation 2-1). As noted in Section 4.5, some of the steam generators had less than 200 indications for use in the growth distributions.
Therefore, a growth distribution was developed which bounded the growth of all of the steam generators. This bounding growth distribution was then applied to each steam generator in lieu of using generator-specific distributions.
The results of the POB calculations are shown in Table 5-1. The highest probability of burst was 8.33 x 104 in S/G C. This is well below the 1.0 x 10 2 hreshold specified in the Generic t
Letter.
l l
Page 61 of 65 51-1245664-00
l
\\.'
is l
Table 5-1 Conditional Probability of Burst Results Steam 95% Upper Confidence Limit for Generator Probability of Burst A
3.73 x 10-5 B
3.26 x 10 5 C
8.33 x 10 5 D
7.84 x 10-5 5.2 MSLB Leakage The accident leak rate due to ODSCC at the tube support plates was calculated for each steam generator using the FTI program STDLKR95.EXE. The parameters for the probability of leakage and leak rate versus voltage correlations which were used in the program are shown in Equations 2-2 and 2-3.
An F* Altemate Repair Criterion for tubesheet indications was also implemented during the 1RE06 inspection. The leak rate for the tubes which were left in service under the F*
criterion must be added to the leak rate due to ODSCC at the tube support plates to obtain the total leak rate. The leak rate for F* tubes was determined to be 2.31 x 10 gallons per minute 4
per tube and is documented in Reference 7.3. The F* criterion, however, was only applied l
to one tube during 1RE06 (Reference 7.4). Therefore the leak rate due to F* tubes at STP-1 is 2.31 x 104 gallons per minute in S/G D and 0 gallons per minute in the other steam generators.
Table 5-2 shows the results of the leak rate calculations as well as the combined ODSCC and F* leakage. As shmvn, the largest calculated total leak rate is 0.00752 gallons per minute in S/G C. This is well below the acceptable limit of 5.15 gallons per minute for the maximum primary-to-secondary leakage initiated by a main steam line break accident as defined in the Safety Evaluation Report for South Texas Plant Amendment 83.
i Page 62 of 65 51-1245664-00
o l
Table 5-2 Leak Rate Calculation Results Steam 95%/95% Upper Tolerance Leak Rate for Total Leak Rate Generator Limit for Leak Rate (gpm)
F* Tubes (gpm)
(TSP & F*)
)
A 0.00213 0
0.0'0213 B
0.00173 0
0.00173 C
0.00752 0
0.00752 D
0.00685 2.31 x 104 0.00685 l
Page 63 of 65 51-1245664-00
$g 3,
6.0 Summary.ed Conclusions i
The May 1996 inspection at STP-1 revealed a total of 1023 distorted support indications. As expected, most of these indications were at the lower support plates on the hot leg side. No indications were detected at cold leg supports or at the flow distribution baffle plates. With 442 DSI's, S/G C had the largest population ofindications, but it also had the lowest average growth rate at 4.5%.
There were no indications detected which were greater than the upper repair limit of 2.85 volts and only six indications detected which were greater than the lower repair limit of 1.0 volt. These indications were inspected with RPC, but only one of the indications was confirmed. This indication'was confirmed as a volumetric indication and the tube was subsequently plugged as required by the Generic Letter. There were no crack-like indications detected at support plates.
RPC was performed on several other support locations, mostly due to dents greater than 5.0 volts at the supports. None of these locations were confirmed as having ODSCC. Two tubes, however, had dented support plate locations in the cold leg which could not be inspected with RPC due to the fact that the dents would not allow passage of the RPC probe. Both of these tubes were plugged.
The average growth rate for all steam generators combined was determined to be 13.1% per EFPY. This growth rate represents the voltage growth between IRE 05 and 1RE06 as compared to the BOC6 voltage and is well below the 30% per EFPY criterion specified in the Generic Letter. Therefore, the 30% per EFPY growth rate will be used when determining the upper repair limit prior to the next inspection.
The tube integrity evaluation shows that the projected probabilities of burst and leak rates are well below the allowable limits. S/G C was determined to be the limiting steam generator.
The 95% upper confidence limit for the probability of burst for S/G C under main steam line break conditions at EOC7 was calculated to be 8.33 x 10 5. This is well below the thre of 1.0 x 10 2 specified in the Generic Letter. The 95%/95% upper tclerance limit for the leak rate for S/G C under accident conditions was calculated to be 0.00752 gallons per minute.
This is well below the acceptable limit of 5.15 gallons per minute as defined in the Safety Evaluation Report for South Texas Plant Amendment 83. Based on these results, the effect of ODSCC at tube support plates on tube integrity is not a major concem for Cycle 7 at South Texas Unit 1.
l Page 64 of 65 51-1245664-00
l dg 7,
1 7.0 References 1
l 7.1 FTl Document BAW-10204P," South Texas Project Unit 1 Tube Repair Criteria For ODSCC At Tube Support Plates".
7.2 FTl Document 51-1245645,"EPRI Leak Rate And Burst Pressure Database For 3/4" Tubing Voltage Based Repair Criteria".
7.3 FTl Document BAW-102C3P,".W E-Series F* Qualification Report".
7.4 FTI Document 51-1245633," South Texas Project - F* Application At STP-1 1 RE06".
i 7.5 NRC Generic Letter 95-05, " Voltage-Based Repair Criteria For Westinghouse Steam Generator Tubes Affected By Outside Diameter Stress Corrosion Cracking".
7.6 NRC Letter, " Safety Evaluation by the Office of Nuclear Reactor Regulation Related to Amendment No. 83; Facility Operating License No. NPF-76; Houston Lighting &
Power Company; City Public Service Board of San Antonio; Central Power and Light Company; City of Austin, Texas; Docket No. 50-498; South Texas Project Unit 1",
l May 1996, l
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