ML20095L102

Basemat Monitoring Program Rept 4

ML20095L102
Person / Time
Site:	Waterford
Issue date:	05/01/1992
From:	Burke J, Mauricio Gutierrez ENTERGY OPERATIONS, INC.
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ML20095L099	List: ML20095L098 ML20095L102
References
NUDOCS 9205060218
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. I ENTERGY OPERATIONS, INC.

WATERFORD STEAM ELECTRIC STATION UNIT NO. 3 BASEMAT MONITORING PROGRAM REPORT NO. 4 Prepared By:

M. R. Gutierrez Reviewed By:

J. P. Burke I

January, 1992 I

I Entergy Operations, Inc.

P. O. Box B K111ona, Louisiana 70066 i.

I 9205060218 920501 PDR ADOCK 05000382 R

pop

I ENTERGY OPERATIONS, INC.

-I WATERFORD STEAM ELECTRIC STATION UNIT NO. 3 BASEMAT MONITORING PROGRAM REPORT NO. 4 TABLE OF CONTENTS I

Section Title Page 1.0 PURPOSE 1

2.0 SCOPE 1

3.0 CONCLUSION

1

4.0 BACKGROUND

AND PROGRAM OVERVIEW 2

4.1 Surveillance Frequency 3

5.0 RESULTS AND DISCUSSIONS 4

5.1 Servey Improvements 4

5.2 Basemat Elevation Survey Results 6

5.3 Groundwater Chemistry 7

5.4 Seasonal Groundwe.ter Levels 8

5.5 Crack Surveillance 8

w REFERENCES I

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ENTERGY OPERATIONS, INC.

WATERFORD STEAM ELECTRIC STATION UNIT NO. 3 BASEMAT MONITORING PROGRAM

~

REPORT NO. 4 LIST OF TABLES Table No.

Title 1

Basemat Edge to Shield Building Baseline Differential Calculation (July, 1984).

2 Sottlement Points Differential Relative to July, 1984, Baseline.

3 Nuclear Plant Island Structure -

Groundwater Chloride Content.

b 4

Nuclear Plant Island Structure -

'Eb Groundwater Elevation.

5 Crack Width Monitoring -

Change in Crack Width without Temperature Correction.

6 Crack W!dth Monitoring -

Change in Crack Width with Temperature correction.

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ENTERGY OPERATIONS, INC.

WATERFORD STEAM ELECTRIC STATION I.

UNIT NO. 3 BASEMAT MONITORING PROGRAM REPORT NO. 4 LIST OF FIGURES Figure No.

Title 1

Settlement Monitoring Points.

2 Groundwater Sampling Wells and Permanent Benchmarks.

3 Instrumented Arrangement at Crack Width Monitoring Station.

4 Crack Width Monitoring Stations.

I.

b Settlement Pointr. Differential.

6 Settlement Points Differential.

7 Settlement Points Differential.

8 Settlement Points Differential.

9 Basemat Absolute Settlements December, 1985 to August, 1990.

10 Basemat Absolute Settlements December, 1985 to February, 1991.

11 Basemat Absolute Settlements December, 1985 to August, 1991.

12 Elevation Variation of Monitoring Points -

Points A and B.

13 Elevation Variation of Monitoring Points -

Foints C and D.

14 Elevation Variation of Monitoring Points -

Points E and F.

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i ENTERGY OPERATIONS, INC.

WATERFORD STEAM ELECTRIC STATION I

UNIT NO. 3 BASEMAT MONITORING PROGRAM REPORT NO. 4 LIST OF FIGURES (CONTINUED)

Fiqure No.

Title 15 Elevation Variation of Monitoring Points -

Points El and E2.

16 Elevation Variation of Monitoring Points -

Points E3 and E4.

17 Elevation Variation of Monitoring Points -

Points E5 and E6.

18 Elevation-Variation of Monitoring Points -

Points E7 and E8.

19 Elevation Variation of Monitoring Points -

Points E9 and E10.

20 Elevation Variation of Monitoring Points -

Points Ell and E12.

21 Elevation Variation of Monitoring Points -

Points E13 and E14.

22 Elevation Variation of Monitoring Points -

Points M9 and M10.

23 Elevation Variation of Monitoring Points -

Points M11A and M12.

A 24 Elevation Variation of Monitoring Points -

Points M13 and W1.

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25 Elevation Variation of Monitoring Points -

Points U2 and W3.

I 26 Elevation Variation of Monitoring Flints -

Points W4 and W5.

27 Elevation Variation of Monitoring Points -

I Points W6 and W7.

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ENTERGY OPERATIONS, INC.

WATERFORD STEAM ELECTPIC STATION UNIT NO. 3 BASEMAT MONITORING PROGRAM REPORT NO. 4 7.IST OF FIGURES (CONTINUED)

Fiqure No.

Title I

28 Elevation Variation of Monitoring Points -

Pointe W8 and W9.

I 29 Elevation Variation of Monitoring Points -

Points W10 and Wil.

30 Elevation Variation of Monitoring Points -

Point W12.

31 Groundwater Chloride Content Variations.

32 Groundwater Elevation Variations.

33 Crack Width Variations Crack Nos. I and 2.

34 Crack Width Variations Crack Nos. 3 and 4.

35 Crack Width Variations Crack Nos. 5 and 6.

36 Crack Width Variations Crack Nos. 7 and 8.

37 Crack Width variations Crack Nos. 9 and 10.

38 Crack Width Variations

_I Crack Nos. 11 and 12.

39 Crack Width Variations Crack Nos. 13 and 14.

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40 Crack Width Variations Crack No. 15.

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ENTERGY OPERATIONS, INC.

WATERFORD STEAM ELECTRIC STATION I

UNIT NO. 3 BASEMAT MONITORING PROGP.AM REPORT NO. 4 1.0 PURPOSE The Nuclear Plant Island Structure (NPIS) Common Foundation Basemat Monitoring Program required by Waterford 3 Technical Specification Section 6.8.4.e has been established to provide continuing assurance of basemat integrity and to ensure that conditions within the basemat do not change significantly.

The monitoring program is being implemented according to Entergy Operations, Inc. Surveillance Procedures PE-5-033 and CE-2-100 I

(References 1 &

2).

These reports have been prepared at approximately 18 month intervals since Waterford 3 has been in operation.

2.0 SCOPE J

This report documents the results :- the. Nuclear Plant Island Structure (NPIS) Common Foundation Basemat Monitoring Program for the four. areas specified in Technical Specification Section I

6.8.4.e.

The four areas are:

a.

Basemat differential settlement

-I b.

Groundwater chemistry c.

Seasonal variation in groundwater level d.

Crack surveillance The Basemat Monitoring Special Report No.

3 (Reference 3),

issued in June, 1990 covered the monitoring data collected through March, 1990.

This report is an extension of the I

previous report and adds the surveillance data collected in May, 1900 through August, 1991.

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3.0 CONCLUSION

The Basemat Monitoring Program bas been active since Waterford

,.I 3 has been in operation.

_The results of the monitoring program are summarized below.

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3.0 CONCLUSION

(CONTINUED) a.

Basemat Differential Settlement - The calculated differen-tial settlements for all eight sets of monitoring points are within the specified action limits of 11.0 inch I

specified in References 1 and 4.

The maximum differential during this reporting period was 0.492 inchem (settlement),

noted in February, 1991 for the east side.

b.

Groundwater Chemistry - The maximum level of groundwater chloride content analyzed was for this reporting period.

The level recorded was 56.10 ppm in May, 1991 for the west side, which was still substantially below the defined limit of 250 ppm specified in Reference 4.

c.

Seasonal Variation in Groundwater Level - Groundwater level variation is small and is similar in the east and west wells.

The overall variation is 3.45 feet for the east well and 4.81 feet for the west well.

d.

Crack Surveillance - Fluctuation in crack width of the fifteen instrumented cracks over the surveillance period is below the prescribed action limit of 15 mils (0.015 inch) soecified in References 1 and 4.

The maximum increase in crack width measured for this period is 3.00 mils for Crack No.

12 for August, 1991.

The crack width variation is cyclic without much fluctuation from its established baseline reading.

The data collected between May, 1990 and August, 1991 has satisfactorily been below the action limits requirements and no unusual behavior of the basemat has been detected.

The continued integrity of the basemat has, therefore, been verified by the surveillance program.

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4.0 BACKGRC5ND AND PROGRAM OVERVIEW A surveillance program for the Nuclear Power Plant Island I

Structure (NPIS) Common Foundation Basemat has been in place since 1985 and was instituted to provide continuing assurance of basemat integrity and to ensure that conditions within the basemat do not change significantly.

The Basemat Surveillance Program is divided into four major areas:

I a.

Basemat-elevation, which is the primary method of E

identifying the gross response of the basemat to loading,

, g soil consolidation and environmental changes, and flexural variations within the basemat. lI

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4.0 BACKGROUND

AND PROGRAM OVERVIEW (CONTINUED) b.

Groundwater chemistry to detect any changes from the current absence of significant rebar corror:lon potential within the basemat.

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Groundwater level to detect any correlation of fluctuations in the groundwater level with measured basemat movements or measured changes in crack width.

d.

Crack surveillance to provide an indication of changes in the state of strain at the top surface of the basemat.

The first Basemat Special Report was submitted for the data collected through December, 1986 as part of the surveillance program to the NRC via Reference 5 on January 5,

1987.

The second Basemat Special Report documenting and evaluating the data collected through August, 1988 was submitted to the NRC via Reference 6 in September, 1988.

The third Basemat Special Report evaluating the data through March, 1990 was submitted to the NRC via Reference 3 in June, 1990.

The analysis of the data collected demonstrated that for the four major areas of the Basemat Surveillance Program, there was no unusual behavior of the basemat.

The reports verified that

- I the basemat continued to perform as designed with all the data below the action limits requirements.

4.1 Surveillance Frequency a.

Basemat Elevation Survey As described in Basemat Special Report No.

3 (Reference 3), Waterford 3 had successfully completed the quarterly surveys and had begun their semi-annual readings.

Four consecutive surveillances have been performed with the first one in March, 1990 and the last one in August, 1991.

In accordance with Procedure PE-5-033, since no significant changes were observed and no adverse or unexplained data has been obtained, Waterford 3 will

,I extend the interval to annually.

b.

Groundwater Chemistry Sampling and analysis of groundwater for chloride l

content is being performed quarterly. I

(.1 Surveillance Frequency (Continued) c.

Seasor.al Groundwater Levels Groundwater level readings are being taken on a

I quarterly basis at the same time as the groundwater chemistry riamples are taken.

d.

Crack Surveillance The crack width monitoring follows the same surveillance frequency stated in Section 4.1.a for the basemat elevation surveys.

The semi-annual frequency has successfully been completed and the interval will be lengthened to annually.

5.0 RESULTS AND DISCUSSIONS The surveillance data collected through August, 1991 for each element of the Basemat Monitoring Program is presented in the following subsections.

5.1 Survey Improvements The existing offsite master benchmark used for all surveying done on the Waterford 3 site is located on a footing of the abandoned transmission tower located about one half mile east of the plant.

The long distance between the benchmark and the plant site makes it difficult to close the survey loop in one day I

within the allowable tolerancea due to heavy vehicular traf fic on adjacent Highway 18 and other fr.ctors such as wind and temperature.

In an effort to improve the I

surveying procedure, two permanent benchmarks (SBM-A and SBM-B) with protective bumper guards were installed on the plant site located outside the protected area fence (see Figure 2).

Entergy Operations, Inc.'s intention was to use the new onsite permanent benchmarks instead of the offsite benchmark to perform the surveys.

It was believed that the vicinity of the cnsite benchmarks would give more control over the survey and eliminate possible error introduced due to the distance traversed.

The elevations of SBM-A and SBM-B were established in March, 1990 at 15.195 feet and 16.653 feet, respectively.

-I-Since March, 1990 the elevation of these benchmarks have been surveyed three times.

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5.1 Survey Improvements (Continued)

Surveys were performed in August of 1990, in February of 1991, and in August of 1991.

The averago elevations of these benchmarks are 0.011 feet lower than the original established elevations.

In August, 1990 SBM-A was surveyed at 15.189 feet and I

SBM-B at 16.645 feet.

Since these elevations were within the tolerance specified in Reference 1, 10.008 feet from the established elevation, they were not resurveyed.

Furthermore, the loop closed within 0.001

feet, well within the allowable closure error of 10.01 feet stated in Reference 1.

On February 25, 1991 SBM-A was determined to be 15.180 feet with a closure error of 0.009 feet.

SBM-B, which was based on SBM-A's reading, was surveyed at 16.641 feet.

Since SBM-A's surveyed elevation was 0.015 feet lower than the established elevation of 15.195

feet, SBM-A was surveyed again on March 4,

1991.

The second survey established the elevation at 15.188 feet.

The average of I

the first and second survey for SBM-A elevation, 15.184 feet, was then used in determining the rest of the basemat monitoring points elevations.

On August 28, 19.01 SBM-A was again determined to be 15.180 feet with a closure error of 0.009 feet.

Once again, since the elevation was 0.015 feet lower than the established elevation, it was surveyed again on September 3,

1991 and determined to be 15.183 feet.

The average elevation of these two surveys, 15.182 feet, was used to adjust the remaining basemat monitoring elevations.

Subsequently, the onsite benchmarks' elevations will continue to be surveyed each surveillance interval using the offsite benchmark.

As stated earlier, the current I

interval is annually and will be lengthened to every refueling outage after three consecutive satisfactory surveillances.

This will satisfy one of the requirements of Reference 1, the old master benchmark shall be ut.ilized at least once per 18 months to verify the elevations of SBM-A and SBM-B.

This concurs with the NRC request stated I

in Reference 7

to utilize the master benchmark at speciffed intervals to verify the elevatic.is of SBM-A and SBM-B.

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I I-5.2 Basemat Elevation Survey Results Differential movements of eight points located at the east and west edges of the NPIS foundation mat relative to the two points located adjacent to the shield building are I

being monitored and compared with the action limit of 11.0 inch.

The baseline differentials for the eight sets of monitoring points were established in

July, 1984 and I

recorded in Table 1.

Listed in Table 2

are the differences between the eight sets of differentials settlements and their corresponding baseline differentials 7

for the entire period of December, 1985 through August, 1991.

These eight sets of settlement point differentials relative to their baselines are also pictorially represented in Figures 5, 6,

7, and 8.

The maximum difference between the calculated differential settlements for this period and their corresponding I

baseline differentials was 0.492 inch (settlement) which was noted in February, 1991 between monitoring points "ES" and "F".

Since the differential settlements for this reporting period are within the action limits, less than 11.0 inch, without any unusual behavior, the element of the surveillance program related to the basemat differential settlements during this period is acceptable.

No distinct trend has been identified among the differential settlemen%;

however, the followin observations have bee'

oncluded.

The differentit settlements between points E5-M9 and M11A-M10 a'

comparable with similar patterns and differentf settlements.

These points are mirror images with one '

of points on the east sido and the other on the west sj The set of points E5-M9 and M11A-M13 are also oppositt each.

The differential settlements of these points l

not as cyclic as the points on the south and north sir the mat.

Their fluctuations are small.

,E The set of points on the southeast side of the mat,

,E 9enerally have a higher differential settlement th set of points on the southwest side MilA-A and y

Differential settlements of M11A-A and MllA-D A

similar patterns.

The results of the three surveys for this report 17 N

are represented as contour plots which depict the behavior of the foundation mat.

The conte represent the settlements of the 37 monitor 1r located on the surface of the basemat (see Fige I

this reporting period relative to their el December, 1985.

The contour plots for these tr i su are shown on Figures 9, 10 and 11.

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5.2 Basemat Elevation Survey Results Differential movements of eight points located at the east and west edger of the NPIS foundation mat relative to the two points located adjacent to the shield building are I

being monitored and compared with the action limit of 11.0 inch.

The baseline differentials for the eight sets of monitoring points were established in July, 1984 and recorded in Table 1.

Listed in Table 2

are the I

differences between the eight sets of differentials settlements and their corresponding baseline differentials for the entire period of December, 1985 through August, I

1991.

These eight sets of settlement point differentials relative to their brPA ines are also pictorially represented in Figures 5,~6, 7,

and 8.

The maximum difference between the calculated differential settlements for this period and their corresponding baseline differentials was 0.492 inch (settlement) which was noted in February, 1991 between monitoring points "ES" and "F".

Since the differential settlements for this reporting period are within the action limits, less than I

11.0 inch, without any unusual behavior, the element of the surveillance program related to the basemat differential settlements during this period is acceptable.

No distinct trend has been identified among the differential settlements;

however, the following observations have been concluded.

The differential I

settlements between points E5-M9 and MllA-M10 are comparable with similar patterns and differential settlements.

These points are mirror images with one set of points on the east side and the other on the west side.

The set of points E5-M9 and M11A-M13 are also opposite of each.

The differential settlements of these points are I

not as cyclic as the points on the south and north side of the mat.

Their fluctuations are small.

The set of points on the southeast side of the mat, ES-F, generally have a higher differential settlement than the set of points on the southwest side MllA-A and M11A-D.

Differential settlements of MllA-A and MllA-D follow similar patterns.

The results of the three surveys for this reporting period I

are r cresented as contour plots which depict the flexural behav.cr of the foundation mat.

The contour plots repre'ient the settlements of the 37 monitoring points, locatad on the surface of the basemat (see Figure 1), for I

thir reporting period relative to their elevation in Decamber, 1985.

The contour plots for these three surveys are shown on Figures 9, 10 and 11. I

I 5.2 Basemat Elevation Survey Results (Continued)

The elevation variation for the 37 monitoring points with respect to the July, 1984 or December, 1985 reading are shown in Figures 12 through 30.

The first available elevation reading is represented by the initial zero reading of the plot.

A dotted line in the graph represents a lack of elevation reading for that period.

Twenty-seven out of thirty-seven monitoring points are I

compared with the

December, 1985 actual or derived readings and the rest of the ten points are compared with the July, 1984 readings.

A review of the contour plots and the graphs depicting elevation variations of the monitoring points reveals that the basemat settlement is cyclic with a slight overall gradual settlement.

The west side of the plant appears to have settled slightly lower than the east side.

The basemat elevation surveillance is considered satisfactory and acceptable since no unusual behavior in the contour configuration and elevation survey of the monitoring points has been observed.

5.3 Groundwater Chemistry I

The chloride content of the groundwater has been analyzed in accordance with Entergy Operations Surveillance Procedure CE-2-100 (Reference 2).

The groundwater chloride content values obtained from the start of the surveillance program through August, 1991 are listed in Table 3 and plotted on Figure 31.

The chloride content varied from 5.23 ppm to 48.0 ppm for the east well and from a low of 5.0 ppm to a high of 56.10 ppm for the west well.

These ranges are based from the start of the program to August, 1991.

These values are well below the action limit of maximum 2S0 ppm and are, therefore, acceptable.

5.4 Seasonal Groundwater Levels The groundwater elevation in the two wells from the start of the program through August, 1991 are listed in Table 4 and plotted on Figure 32.

The seasonal variation of groundwater levels is usually I

similar between both wells.

The overall variation is 3.45 feet for the east well and 4.81 feet for the west well.

In the

past, the variation in groundwater elevation betwet:

the west and east well ranged from 0.00 feet to 0.30 feet.

5.4 Seasonal Groundwater Levels (Continued)

However, in May, 1991 the west well was 0.47 feet higher than the east well and in August, 1991 the west well was 0.90 feet lower than the east.

Also, the groundwater elevation in August, 1991 was the lowest recorded.

The east well's elevation was 9.60 feet and the west well's elevation was 8.70 feet.

Prior to I

that, the elevation varied from 10.70 to 13.05 feet for the east well and 10.97 to 13.51 feet for the west well.

5.5 Cracks Surveillance The change in crack widths without temperature corrections I

for the fifteen instrumented cracks are listed in Table 5.

Table 6 shows crack width variations after temperature correction is appli'd.

The values given in the tables are cumulative variations in crack width with respect to the I

baseline reading which was established in August, 1986 for Crack Nos.

3, 5, 11 and 12 and May, 1987 for the remaining eleven cracks.

Shown on Figure 4 are the locations of the I

fifteen cracks.

The crack width variation with respect to its base reading I_

for each crack from start to August, 1991 is pictorially represented in Figures 33 through 40.

The results show that the maximum increase in crack width I

was 4.65 mils which was measured in March, 1988 for Crack No. 12 as reported in Special Report No. 2 (Reference 6).

This variation has since been reduced to 3.00 mils as reported in the August, 1991 surveillance.

The crack width variations for all the cracks, with the exception of Cracks 3 and 12, do not fluctuate more than 3.15 mils from I

their baseline readings.

Other than the crack width measurement of -3.45 mils report for Crack 3,

all other variations for this crack is less than or equal to 1.00 mils.

A crack width of -3.45 mils was measured in February, 1991 for Crack 3.

However, comparing this data to the previous and later data for this crack, it appears that this is an erroneous reading.

Neither this crack or any other cracks have e crack width variance this low.

The thermal reading for this crack is higher than the thermal readings for the adjacent cracks for this surveillance.

It can be concluded that this erroneous I

reading is the contributing factor for the lower reading..

_n 5.3 Cracks Survel) lance Since the crack width variations were below the action

limit, 15 mils, the crack surveillance element of the monitoring program for this period was satisfactory and acceptable.

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REFERENCES 1.

Entercy Operations Surveillance Procedure, "NPIS Common Foundation Basemat Integrity Check," PE-5-033, Revision 4.

2.

Entergy Operations Surveillance Procedure, " Chemistry Technical Specifications, Surveillance Performance Coordination,"

CE-2-100, Revision 6.

3.

Entergy Operations, Inc.

Report, "Waterford Steam Electric Station Unit No.

3, Basemat Monitoring Program Special Report I

No.

3," June, 1990.

4.

LP&L report, "Waterford Steam Electric Station Unit No.

3, Basemat Summary Report," July, 1987.

5.

LP&L Report, "Waterford Steam Electric Station Unit No.

3, Basemat Monitoring Program Special Report," December 30, 198G.

6.

LP&L Report, "Waterford Steam Electric Station Unit No.

3, Basemat Monitoring Program Special Report No.

2,"

September, 1988.

7.

NRC letter, D.

L. Wigginton (USNRC) to LP&L, Summary of Meeting Held on April 18, 1990 with LP&L to Discuss the Settlement Monitoring, Basemat Crack Monitoring, and Groundwater Level Monitoring Programs, Docket No. 50-383 - May 23, 1990.

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I TABLE 1 ENTERGY OPERATIONS, INC.

WATERFORD STEAM ELECTRIC STATION UNIT NO. 3 BASEMAT MONITORING PROGRAM REPORT NO. 4 BASEMAT SETTLEMENT MONITORING I

BASEMAT EDGE TO SHIELD BUILDING BASELINE DIFFERENTIAL CALCULATION (JULY, 1984)

Baseline Monitoring Points Baseline Elevations (Ft)

Differential (Ft)

I ES - M9

(-35.284)-(-35.286)

+0.002

=

E5 - E13

(-35.284)-(-35.334)

+0.050

=

ES - E14

(-35.284)-(-35.336)

+0.052

=

ES - F

(-35.284)-(-35.438)

+0.154

=

MilA - M10

(-35.364)-(-35.440)

+0.076

=

M11A - M13

(-35.364)-(-35.288)

-0.076

=

M11A - A

(-35.364)-(-35.420)

+0.056

=

-M11A - D

(-35.364)-(-35.606)

+0.242

=

NOTE:

For location of Monitoring Points, see Figure 1.

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M M-TABLE 2 ENTERGY OPERATIONS, INC.

.WATERFORD STEAM ELECTRIC STATION UNIT NO. 3 BASEMAT MONITORING PROGRAM REPORT NO. 4 SETTLEMENT POINTS DIFFERENTIAL RELATIVE TO JULY, 1984 BASELINE (b)

(INCH)

(Action Limit) = + 1.0 Inch) mrzon

-ING POINTS (a) DEC 85 JUL 06 DEC 86 JUr 87 SEP 87 DEC 87 MAR SS AUG 88 MOV 88 FEB 89 MAY 89 AUG 89 MAR 90 AUG 9C FEB 91 AUG 91 E3-M9 0.156 0.180 0.192 0.168 0.168 C.348 0.324 0.132 0.336 0.3'6 0.276 0.264 0.350 0.216 0.420 0.264 E3-313 0.120 0.276 0.324 0.114 0.252 0.192 0.288 0.300 0.288 0.216 0.J00 0.240 53-E14 0.096 0.300 0.324 0.091 0.192 0.156 0.264 0.288 0.240 0.168 0.228 0.216 23-F 0.540 0.228 0.084 0.480 0.408 0.468 0.456 0.310 0.288 0.468 0.276 0.420 0.360 0.300 0.492 0.384 M11A-M10 0.228 0.168 0.288 0.084 0.216 0.312 0.348 0.215 0.408 0.300 0.264 0.252 0.324 0.180 0.408 0.336 M114-M13 0.036 0.060 0.060 0.084 0.108 0.156 0.144 0.145 0.192 0.132 0.096 0.156 0.132 0.132 0.180 0.16P M11A-A

-0.024

-0.156

-0.024 0.036 0.420 0.036 0.420 0.102 0.096

-0.060

-0.024 0.036

-0.060

-0.060 0.240 0.312 ft11a-D

-0.060

-0.120

-0.024 0.000 0.396 0.060 0.384 0.024 0.108

-0.024

-0.036 0.000

-0.024

-0.096 0.252

0. 30f' NCmtS t (a) For location of exmitoring points, see Figure 1.

(b) Differant$als are calculated as " Baseline Differential" minus " Actual Differential."

Sign convention A (*) dif ferential indicates cettlement, whereas, a (-) differential indicates heaving of the Basemet.

TABLE 3 ENTERGY OPERATIONS, INC.

WATERFORD STEAM ELECTRIC STATION l

UNIT NO. 3 BASEMAT MONIriORING PROGRA 4 REPORT NO. 4 NUCLEAR PLANT ISLAND STRUCTURE GROUNDWATER CHLORIDE CONTENT (ppm)

(Action Limit = 250 ppm)

LOCATION j

DATE EAST WELL WEST WELL 08/29/84 22.00 17.50 11/29/84 35.00 28.50 03/04/85 37.00 25.00 l

06/13/85 35.00 22.00 09/21/85 23.00 14.40 I

11/25/85 46.00 18.00 03/06/86 35.00 16.00 1

06/02/86 33.00 15.00 09/05/86 33.00 20.00 11/20/86 31.00 20.00 02/26/87 38.00 15.00 06/09/87 48.00 7.80 j

_l-09/03/87 22.00 5.00 12/14/87 36.00 7.70 03/15/88 22.50 24.80 i

06/14/88 29.80 10.10 08/15/88 21.00 6.10 11/17/88 17.00 4.8

-02/20/89 21.00 5.60 05/15/89 15.90 5.20 08/15/89 12.70 5.00 11/14/89 43.20 15.00 02/23/90 19.50 16.70 05/16/90 15.50 14.50 08/29/90 32.59 16.42 I

11/16/90 49.10 18.20 02/18/91 21.70 11.30 05/31/91 5.23 56.10 08/28/91 19.90 6.70 I

NOTE:

For location of we:18, see Figure 2.

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ENTERGY OPERATIONS, INC.

WATERFORD STEAM ELECTRIC STATION UNIT NO. 3 BASEMAT MONITORING PROGRAM REPORT NO. 4 NUCLEAR PLANT ISLAND STRUCTURE I

GROUNDWATER ELEVATION (FT.)

(No Action Limit)

LOCATION DATE EAST WELL WEST WELL 06/13/85 11.50 11.50 09/21/85 10.70 10.97

--l 11/25/85 11.65 11.52 03/06/86 11.57 11.70 06/02/86 11.67 11.80 09/05/86 11.75 11.91 I

11/20/86 11.90 12.11 02/26/87 12.00 12.01 06/09/87 12.05 12.35 I

09/03/87 11.90 12.11 12/14/87 11.36 11.18 03/15/88 12.00 12.16 I

06/14/88 11.92 12.13 08/18/88 12.23 12.26 11/17/88 11.65 13.81 02/20/89 11.60 11.61 I

05/15/89 12.15 12.02 08/15/89 12.15 12.39 11/14/89 12.10 11.85 I-02/23/90 12.90 13.00 05/16/90 12.23 12.21 08/29/90 11.45 11.55 I-11/16/90 11.45 11.36 02/18/91 13.05 12.86 05/31/91 13.04 13.51 08/28/91 9.60 8.70 I

NOTE:

For location of wells, see Figure 2.

I

'M M

M M

M.

TABLE 5 ENTERGY OPERATIONS, INC.

WATERFORD STEAM ELECTRIC STATION UNIT NO. 3 BASEMAT MONITORING PROGRAM REPORT NO. 4 CRACK WIDTH MONITORING CHANGE IN CRACK WIDTH IN MILS (0._001 IN.)

WITHOUT TEMPERATURE CORRECTION c? TACK NO.

NCY 86 FEB 87 MAY 87 8EPT 87 DEC 87 MAR 88 JUNE 88 ACO 88 NOV 88 FEB 89 MAY 89 AUG 99 MAR 90 AUG 90 FEB 91 AW 91 1

0.45 1.40 1.85 0.90 0.50 0.45 1.30

-0.65

-1.30

-1.50

-1.30

-1.85

-3.60 2

0.15 1.00 1.70 0.40 0.25 0.90 1.05

-2.05

-1.90

-0.70

-0.75

-1.10

-0.50 3

-0.40

-0.20

-0.20

-0.20

-0.10 1.35 0.05 0.00 0.25 1.20

-2.50

-2.80

-1.75

-1.30

-3.15

-2.00 4

0.05 3.15 3.35 0.60 0.05 0.90 2.70

-1.25

-2.00

-0.20

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-1.75 9

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-2.05

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-2.30

-2.25

-2.30

-1.60 7

C.40 0.90 0.80 0.15 0.05 0.10 0.15

-2.35

-2.30

-1.55

-1.05

-1.65

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0.50 0.35 1.25 0.20 0.05

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0.45 0.15 0.25 0.80 0.35 0.45 1.10

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-0.40

-1.70 11

-0.10 1.50

-0.60 C 35 0.70 1.65 0.55 0.35 0.80 1.05

-1.95

-1.85

-0.95

-1.80

-1.00

-0.05 12 1.30 3.50 0.70 0.10 1.30 3.95 2.30 1.25 1.15 5.35 0.50

-1.15 2.45

-1.45 4.65 1.90 13 0.20 1.10 3.40

-0.05 0.45 0.85 1.90

-1.75

-1.95

-0.75

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-0.45

-1.61 14 0.00 0.55 2.15 0.45 0.10 0.65 2.20

-1.70

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-2.00 15 0.80 0.95 1.65 0.40 0.90 1.05 1.45

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TABLE 6 ENTERGY OPERATIONS, INC.

WATERFORD STEAM ELECTRIC STATION UNIT NO. 3 BASEMAT MONITORING PROGRAM REPORT NO. 4 CRACK WIDTH MONITORING CHANGE IN CRACK WIDTH IN MILS (0.001 IN.)

WITH TEMPERATURE CORRECTION Co.

WOV 86 FE8 87 MAY 87 SEPT 87 DEC 87 MAR 88 JLTE 88 AUG 88 190V 88 FE3 89 MAY 89 AUD 69 MAR 90 AUG 90 FES 91 AUD 91 cuca

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-0.90

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-0.25

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1. 05 1.80 0.40 1

3

-0.50 0.20

-0,30

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-0.55 2.35 3.15

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FIGURE 38 I

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