ML20045F034

Basemat Monitoring Program Rept 5

ML20045F034
Person / Time
Site:	Waterford
Issue date:	05/31/1993
From:	Mauricio Gutierrez ENTERGY OPERATIONS, INC.
To:
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ML20045F024	List: ML20045F023 ML20045F034
References
NUDOCS 9307060338
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EN'ERGY OPERATIONS, INC.

l WATERFORD STEAM ELECTRIC STATION UNIT NO. 3 1

3 1

a BASEMAT MONITORING PROGRAM REPORT NO. 5 May 1993

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-l Prepared By:

.M. R. Gutierrez i

Reviewed By:

J. P. Burke l

l 9307060338 93 0 7,0 /

PDR ADOC M 05000382

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ENTERGY OPERATIONS, INC.

WATERFORD STEAM ELECTRIC STATION

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UNIT N0. 3 BASEMAT MONITORING PROGRAM REPORT NO. 5 TABLE OF CONTENTS i

Section Title Pagg s

1.0 PURPOSE 1

2.0 SCOPE 1

3.0 CONCLUSION

2 4.0 RESULTS~AND DISCUSSIONS 2

5.0 REFERENCES

4 i

i EETERGY OPERATIONS, INC.

WAIERFORD STEA' ILECTRIC STATION t

UNIT NO. 3 BASEMAT MONITORING PROGRAM REPORT NO. 5 LIST OF TABLES Table No.

Title 1

Settlement Points Differential Relative to July, 1984 Baseline 4

t 2

Nuclear Plant Island Structure -

Groundwater Chloride Content 3

Crack Width Monitoring -

Change in Crack Width in Mils with Temperature Correction-4 Crack Width Monitoring -

Change in Crack Width in Mils without Temperature Correction 5

Nuclear Plant Island Structure -

Groundwater Elevation s

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ENTERGY OPERATIONS, INC.

WATERFORD STEAM ELECTRIC STATION UNIT NO. 3 i

BASEMAT HONITORING PROGRAM REPORT NO. 5 LIST OF FIGURES Fiaure No.

Title 1

Settlement Monitoring Points 3

2 Crack Width Monitoring Stations 3

Groundwater Sampling Wells iii

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1.0 PURPOSE l

The Nuclear riant 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-005-1 033, NPIS Common Foundation Basemat Integrity Check, and CE-002-100, Chemistry Technical Specification Surveillance Performance Coordination.

This is the fifth Basemat Monitoring Program Report prepared for the U.S. Nuclear Regulatory Commissici.

2.0 SCOPE This report documents the results of the NPIS Common foundation Basemat Monitoring Program for the period of September 1991 to May 1993. During this period, one basemat survey and crack width surveillance was performed in August 1992. This was the second of the three annual basemat surveillances required done at Waterford 3.

The groundwater chloride content and elevation measurements are done on a quarterly basis; therefore, seven measurements were taken this period.

i Reouirements i

Technical Specification Section 6.8.4.e states that the program will monitor the settlement of the basemat, changes in ground water chemistry that could effect corrosion of reinforcing steel, changes in crack width, and seasonal variation in ground water levels.

Acceptance Criteria The measurements taken to comply with the technical specifications are i

compared with the acceptance criteria and requirements stated in Reference 5.

The acceptance criteria include the following:

a.

an action limit of one inch for the difference between the baseline differential settlemenc based on July 84 readings and the calculated differential settlement for a surveillance; b.

an action limit of 250 ppne for the measurement of chloride content in the groundwater; and I

i 2.0 SCOPE (CONTINUED) c.

an action limit of 15 mils (0.015 inch) for the difference between the baseline and measured crack widths.

No acceptance criteria is associated with seasonal variation in groundwater levels.

It is tracked to determine if there is a correlation with this level and the basemat settlement and movement.

3.0 CONCLUSION

S All of the acceptance criteria stated in Section 2 aave been met for this reporting period. The reported data for all tiie surveillances since the beginning of the basemat program have consistently been well below the action limits.

4.0 RESVLTS AND DISCUSSIONS The data obtained for the basemat elevations, crack width measurements, chloride content in groundwater, and groundwater elevations can be found in the Work Authorizations listed in Section 5.0, References.

Differential Settlement Differential settlement is defined as the settlement between a monitoring point at the basemat center near the shield building and a monitoring point at the boundary of the NPIS.

The differential settlements for all eight sets of points were well below the action limit of one inch. Table 1 lists all the differential settlements since the beginning of the program through August 1992. The highest calculated differential settlement for this reporting period was 0.372 inches.

Waterford 3 has also tracked the. settlement of 27 additional points on the basemat.

Reference 1 lists the elevations for all 37 points.

Figure 1 (Attachment 10.2 of Procedure PE-005-033 Revision 5) shows the locations of all the points. No action limit is associated with these measurements. They are tracked to monitor the overall flexural behavior of the foundation mat. No unusual behavior was observed this period.

2

4.0 RESULTS AND DISCUSSIONS (CONTINUED)

Chloride Content The chloride content in the groundwater remains far below the action limit of 250 ppm. The highest level for-this reporting period was 56.40 ppm, measured in the east well on May 19, 1992. Table 2 shows the seven i

measurements taken during the past reporting period and the measurements taken since the start of the program.

Figure 3 shows the locations of the east and west well.

Crack Width Measurements Table 3 and 4 lists the crack width measurements with and without temperature correction, respectively, from the start of the program to August 1992. All the measurements for the August 1992 surveillance are well below the action limit of 15 mils.

Figure 2 (Attachment 10.8 of Procedure PE-005-033 Revision 5) shows the locations of all the cracks.

h Groundwater Elevation The groundwater elevation in the east and west well fluctuated less than 1.5 feet between each reading from September 1991 to May 1993. The levels in the wells have been similar at each reading. The groundwater i

elevation in the two wells from the start of the program through May 1993 are listed in Table 5.

Figure 3 shows the locations of both wells.

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5.0 REFERENCES

l 1.

Work Authorization #01098410, Survey of Basemat.

2.

Work Authorization #01098412, Survey of SBM-A and SBM-B.

3.

Work Authorization #01098411, Crack Width Measurements.

4.

Work Authorizations #01086437, #01089938, #01092511, #01098211,

1. 01101257, #01104472, and #01108610, Verify Chlorides and Ground Water Elevation.

5.

Letter W3P87-1123, K. W. Cook to NRC, Basemat Surveillance Program, dated June 26, 1987.

6.

Entergy Report, "Basemat Monitoring Program Report No.

4,"

January, 1992.

7.

Enetergy Operations Surveillance Procedure, "NPIS Common Foundation Basemat Integrity Check," PE-005-033, Revision 5.

t 8.

Enetergy Operations Surveillance Procedure, " Chemistry Technical-i Specifications Surveillance Performance Coordination," CE-002-100, Revision 7.

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TABLE 1 ENTERGY OPERATIONS, INC.

WATERFORD STEAM ELECTRIC STATION UNIT NO. 3 BASEMAT MONITORING PROGRAM REPORT NO. 5 SETTLEMENT POINTS DIFFERENTIAL RELATIVE TO JULY, 1984 3ASELINE fa)

(INCH)

(Action Limit = i 1.0 Inch)

MONITORING (b)

POINTS DI'C 85 JUL86 UEC86 JIIN 87 SEP87 DEC87 MAR 88 A110 88 NOV 88 FEB 89 MAY 89 AUG89 MAR 90 At10 90 FED 9I At O 9l AtU 92 E5-M9 0.156 0.180 0.192 0.168 0.168 0348 0.324 0.132 0336 0336 0.276 0.264 0360 0 216 0.420 0.264 0.216 ES-E13 0.120 0.276 0324 0.114 0.252 0.192 0.288 0300 0.288 0.216 0300 0.240 0.132 ES-E14 0.096 0300 0324 0.091 0.192 0.156 0.264 0.288 0.240 0.168 0.228 0.216 0.036 E5-F 0.540 0.228 0.084 0.480 0.408 0.468 0.456 0310 0.288 0.468 0.276 0.420 0360 0300 0 492 0384 0372 Mil A-M10 0.228 0.168 0.288 0.084 0.216 0312 0.348 0.215 0.408 0300 0.264' O.252 0 324 0.180 0.408 0336 0.228 Mil A-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 0.168 0.132 Mil A-A

-0.024

-0.156

-0.024 0.036 0.420 0.036 0.420 0.102 0.096 4.060

-0.024 0.036

-0.060 4.060 0.240 0312 0.108 MilA-D

-0.060 4.120 4.024 0.000 0396 0.060 0384 0.024 0.108

-0.024 0.036 0,000

-0.024 4.096 0.252 0.300 0.120 NOTE:

(a)

Differentials are calculated as " Baseline DitTerential" minus " Actual Ditrerential."

Sign convention: A (+) differential indicates settlement, whereas, a (-) differential indicates heaving of the Basemat.

(b)

New data calculated during this report period.

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TABLE 2 ENTERGY OPERATIONS, INC.

WATERFORD STEAM ELECTRIC STATION.

UNIT NO. 3 BASEMAT MONITORING PROGRAM REPORT NO. 5 NUCLEAR PLANT ISLAND STRUCTURE GROUNDWATER CHLORIDE CONTENT (com)

(Action Limit = 250 ppm)

LOCATION 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 06/13/85 35.00 22.00 09/21/85 23.00 14.40 11/25/85 46.00 18.00 03/06/86 35.00 16.00 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 09/03/87 22.00 5.00 12/14/87 36.00 7.70 03/15/88 22.50 24.80 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 11/16/90 49.10-18.20 02/18/91 21.70 11.30 1

05/31/91 5.23 56.10 08/28/91 19.90 8.70 11/22/91 24.40 6.80 02/18/92 12.10 1.50 05/19/92 56.40 1.40 j

08/03/92 20.60 9.00 1

11/08/92 4.40 0.35 02/04/93 16.60 1.58 05/20/93 45.30 3.70 NO1E:

The seven measuements taken 11/22/91 through 05/20/93 were taken during this report perioi c

TABLE 3 ENTERGY OPERATIONS, INC.

WATERFORD STEAM ELECTRIC STATION UNIT NO. 3 BASEMAT MONITORING PROGRAM REPORT NO. 5 CRACK WIDTH MONITORING CHANGE IN CRACK WIDTH IN MILS (0.001 INCH)

WITH TEMPERATURE CORRECTION (ACTION LIMIT = 15 MILS (0.015 INCH))

CRACK (a))

NUMBER NOV86 FEB87 MAY87 SEIT 87 DEC57 MAR 88 JUNE 88 AUG88 NOV 88 FEB19 MAY 89 AUG MAR 90 AUG 90 FEB 91. AUG9i AUG 92 89 1

-035 0.20 0.45 0.20 0.10

-0.05 030 1.25 1.30 0.90 0.90 0.95

-1.20

-I65 2

-0.65 130 1.10 0.90 0.55

-0.10 0.65 4 25

• l.10 1.10 1.05 8.80 0.40 1.85 3

0.50 0.20 030

-0.20

-0.40 1.05 0.15 0.20 0.45 0.50 0.20 0.10 0.45 0.60

-3.45 1.00

-4.50 4

-0.55 233 3.15

-0.60

-0.65 0.30 2.00 0.25 030 1.80 1.90 3.00 0.75 2.75 5

0.00 0.40

-0.50 035 1.10 0.00 035 0.00 0.80 0.20 0.50 3.00 4.30 1.05 0.45

-1.50 335 6

435

-0.70

-0.55

-0.65 0.65

-0.60 0.40 0.55 0.10 0.20 1.15 1.00 0.10 1.05 7

-030 0.50 0.20

-0.75 4.55 0.40

-0.95 0.25 0.80 0.55 1.15 0.55 0.20 0.55 8

- 0.20

-I.15

' O 45 0.90 0.75 1.60

-1.00

-1,00

-0.85

-0.45

-035

-0.40

-0.85 0.40 9

0.25

-0.15

-0.25 0.00 0.15 0.55 0.80 0.20 0.05 0.55 0.55 '

l.05 0.55 030 10 0.75.

0.25 1.40 1.15 0.40 0.35 0.20 0.00 0.15 0.50 035 0.70 0.20 2.60 11 030 0.10

-0.50

-035 0.50 0.05 1.95

-0.15 030 0.45 0.75 035 0.65

-060 0.10 235 135 12 1.20 3.70 1.00 0.10 1.90 4.65 2.80 1.55 1.05 4.45 0.50 1.25 1.85 0.25 2.15 3.00 1.60 '

13.

0.20 1.00 2.40

-0.15 0.15 0.75 2.50 0.45 0.15 1.05 0 95 235 1.65 0.20 14

-0.80 0.55 1.95 0.05 0.90

-0.65 0.50

-0.10

-0.40 0.40

-1.45 1.80

-1.10 1.10 15 0.70 1.05 8.75 0 50 1.20 1.75 1 35 I30 1 55 1.45 I IS 2.10 1 95 4 30 Note:

(a)

New data calculated during this report period.

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TABLE 4 ENTERGY OPERATIONS, INC.

WATERFORD STE?li ELECTRIC STATION UNIT NO. 3 BASEMAT MONITORING PROGRAM REPORT NO. 5 CRACK WIDTH MONITORING CHANGE IN CRACK WIDTH IN MILS (0.001 INCH)

WITHOUT TEMPERATURE CORRECTION (ACTION LIMIT = 15 MILS (0.015 INCH))

CRACK (a))

NUMBER NOV86 FEB 27 MAY87 SEPT 87 DEC87 MAR 88 JUN 88 AUG 88 NOV88 FEB 89 MAY 89 AUG MAR 90 AUG 90 FEB 91 AUG91 Al.M3 92 29 1

0.45 1.40 1.85 0.90 0.50 0.45 130 0.65

-130 1.50

-130

-1.85

-3.60

-2.85 2

0.15 1.00 1.70 0.40 0.25 0.90 1.05

-2.05

-1.90

-0.70

-0.75

-l.10

' 4.50

-0.15 3

-0.40 0.20

-0.20 0.20 0.10 135 0.05 0.00 0.25 1.20

-2.50

-2.80

-1.75 130 3.15

-2.00

-4.40 4

0.05 3.15 335 0.60 0.05 0.90 2.70

-I.25

-2.00 0.20

-0.20 1.50

-l.75

-1.65 5

-0.10 0.00

-0.50

-0.05 1.20 1.10 0.65 0.00 0.70 0.70

-1.60 0 30

-1.70

-2.05 4.15

-2.50

-0.95 6

-0.15 0.50 0.15

-0.25

-0.45

-0.20 0.00

-2 85

-2.60 -

-230

-2.25 230

-1.60 '

-3.15 7

0.40 0.90 0.80 0.15 0.05 0.10 0.15

-235

-230

-1.55 -

-1.05

-1.65 1.90

-2.75 5

0.50 035 1.25 0.20 0.05

-0.20 0.20

-2.50

-2.55

-2.05

-2.25

-1.50

-2.25

-2.00 9

0.45 0.15 0.25 0.80 0.35 0.45 1.10

-230

-2.25

-1.75

-2.05

-0.85

-1.85 '

1.60 10 0.65 0.75 2.00 0.65 030 0.85 1.20

-1.90

-I.85

-0.80

-1.25

-0.40

-1.70 2.10 11

-0.10 1.50 0.60 035 0.70 1.65 0.55 035 0.80 1.05 -

-1.95

-1.85

-0.95

-1.80

-1.00 0.05

-5.45 12 130 3.50 0.70 0.10 1.30 3.95 230 1.25 1.15 5.35 0.50

-1.15 2.45

• l.45 4.65 I.90 '

-030 13 0.20 1.10 3.40 0.05 0.45 0.85 1.90

-1.75

-1.95

-0.75

-0 85 0.45.

-1.65 -

-3.80 14 0.00 0.55 2.15 0 45 0.10 0.65 2.20

-1.70

-1.50

-1.40

-2.15 0.03

-2.00

-1.70 15 0.80 0.95 1.65 0 40 0.90 1.05 1.45

-1.90

-1.75

-1.85

-1.75

-1.00

-1.65

-3.50 Note:

(a)

New data calculated during this report period.

TABLE 5 ENTERGY OPERATIONS, INC.

WATERFORD STEAM ELECTRIC STATION UNIT NO. 3 BASEMAT MONITORING PROGRAM REPORT NO. 5 NUCLEAR PLANT ISLAND STRUCTURE GROUNDWATER ELEVATION (FEET)

(No Action Limit) h e

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

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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 11/20/86 11.90 12.11 02/26/87 12.00 12.01 i

06/09/87 12.05 12.35 09/03/87 11.90 12.11 12/14/87 11.36 11.18 03/15/88 12.00 12.16 06/14/88 11.92 12.13 08/18/88 12.23 12.26 11/17/88 11.65 11.81 02/20/89 11.60 11.61 05/15/89 12.15 12.02 l

08/15/89 12.15 12.39 i

11/14/89 12.10 11.85 02/23/90 12.90

-13.00 05/16/90 12.23 12.21 08/29/90 11.45 11.55 11/16/90 11.45 11.36 02/18/91 13.05 12.86 05/31/91 13.04 13.51 08/28/91 10.80 12.11 11/22/91 11.40 11.51 02/18/92 12.00 11.90 f

05/19/92 11.50 11.61 08/03/92 12.20 12.36 1

11/08/92 12.15 12.35 02/04/93 12.10 11.50 05/20/93 12.82 12.82 NOTE:

The seven measurements taken 11/22/91 through 05/20/93 were taken during this report period.

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BASEMAT MONITORING PROGRAM REPORT NO. 5 Administrative Revision Summary t

CHLORIDE CONTENT Table 3, Groundwater Chloride Content, of Basemat Monitcring Report No. 4 contains a typo for the measurement of the chloride content for the west well on August 28, 1991.

The chloride content is listed as 6.70 ppm, the actual content was 8.70 ppm.

Table 2 of Report No. 5 has the correct content.

l GROUNDWATER ELEVATION Table 4 Groundwater Elevation, in Basemat Monitoring Program Report No. 4 list the sounding tape readings instead of the elevations of the groundwater for the August 28, 1991, measurements.

The correct groundwater elevations for the east and west wells are 10.80 feet and 12.11 feet, respectively, Table 5 of Report No. 5 contains the correct elevation.

REPORT CHANGES i

Since the basemat program has been in existence, four reports have been written to summarize the data collected during each reporting period.

Each report contained the historical data, background information, and graphs presenting the data.

Since this reporting period only contains one extra set of data from the August, 1992, basemat survey and crack surveillance and seven sets of data for the chloride content and groundwater elevation, this fifth report concentrates on stating the findings of the current surveillances and relating them to the acceptance criteria stated in Letter W3P87-1123.

Consequently, the historical data, background information, and graphic l

presentation of data is omitted from this report.

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