ML16127A495

018_05 Appendix 05E Structural Integrity Testing

ML16127A495
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Site:	Three Mile Island
Issue date:	04/11/2016
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TMI-1 UFSAR APPENDIX 5E 5E-i REV. 18, APRIL 2006

APPENDIX 5E

GILBERT ASSOCIATES, INC., PRELIMINARY REPORT

TO METROPOLITAN EDISON COMPANY

ON STRUCTURAL INTEGRITY TESTING OF THE REACTOR BUILDING STRUCTURE

FOR THREE MILE ISLAND NUCLEAR STATION UNIT 1

This Report Contains:

24 pages of text 7 tables 22 figures

TMI-1 UFSAR APPENDIX 5E 5E-ii REV. 18, APRIL 2006 November 5, 1969 GAI REPORT NO. 1710

PRELIMINARY REPORT ON STRUCTURAL INTEGRITY TESTING OF REACTOR BUILDING STRUCTURE FOR THREE MILE ISLAND NUCLEAR STATION UNIT 1 METROPOLITAN EDISON COMPANY

Gilbert Associates, Inc.

525 Lancaster Avenue Reading, Pennsylvania

TMI-1 UFSAR APPENDIX 5E 5E-iii REV. 18, APRIL 2006 TABLE OF CONTENTS

1. PURPOSE

2. DESCRIPTION OF CONTAINMENT STRUCTURE

2.2 GEOMETRY

AND PRINCIPAL ELEMENTS

2.3 MATERIALS

2.3.1 Liner

2.3.2 Mile Steel Reinforcement

2.5 CONSTRUCTION

METHODS

3. TEST REQUIREMENTS

3.1 PRELIMINARY

SAFETY ANALYSIS REPORT

4. TEST PROCEDURES

4.1 GENERAL

DESCRIPTION

4.3 DURING

TEST

4.4 FOLLOWING

TEST0

5. INSTRUMENTATION

5.1 GENERAL

DESCRIPTION

5.1.1 Displacement

Measurements

5.1.2 Strain

Measurements

5.1.4 Tendon

Anchorage Zone Inspection6

6. AS BUILT CONDITIONS

7. CALCULATED RESPONSE

7.1 GENERAL

DESCRIPTION

7.2 CALCULATED

DISPLACEMENTS 7.3 MEASUREMENT, ANALYSIS, AND CONSTRUCTION INACCURACIES

8. FORMS FOR RECORDING THE MEASURED DISPLACEMENTS, STRAINS, TEMPERATURE, AND TENDON ANCHORAGE OBSERVATIONS

9. INTERPRETATION OF RESULTS

TABLES FIGURES TMI-1 UFSAR APPENDIX 5E 5E-iv REV. 18, APRIL 2006 LIST OF TABLES

Table 1 Instrument Location

Table 2 Strain Gages Full Bridge

Table 3 Strain Gages Rosettes

Table 4 Displacement LVDT'S

Table 5 Displacement Scales and Tapes

Table 6 Temperature Readings

Table 7 Tendon Anchorage Observations - Wire Failures

TMI-1 UFSAR APPENDIX 5E 5E-v REV. 18, APRIL 2006 LIST OF FIGURES

Number Title 5E-1 Reactor Building - Cross Section

5E-2 Ideal Schedule

5E-3 Instrumentation - Outside Face

5E-4 Instrumentation - Inside Face

5E-5 Instrumentation - Equipment Access - Outside Face

5E-6 Instrumentation - Penetrations - Interior Face

5E-7 Radial Displacements of Reactor Building

5E-8 Crack Patterns - Wall and Dome Junction

5E-9 Crack Patterns - Wall

5E-10 Crack Patterns - Equipment Access

5E-11 Crack Patterns - Concrete Ring Beam Area

5E-12 Cylinder Base Radial Displacement

5E-13 Cylinder Base and Wall Radial Displacement

5E-14 Cylinder Wall and Dome Radial Displacement

5E-15 Cylinder Wall and Dome Radial Displacement

5E-16 Dome Radial Displacement and Cylinder Ledge Vertical Displacement

5E-17 Base and Dome Apex Vertical Displacement

5E-18 Equipment Access Displacement

5E-19 Equipment Access Displacement

5E-20 Equipment Access Displacement

5E-21 Equipment Access Displacement

5E-22 Equipment Access Displacement

TMI-1 UFSAR APPENDIX 5E 5E-1 REV. 20, APRIL 2010

1. PURPOSE

The purpose of this report is to present pertinent information on the design and materials of the Reactor Building; and to outline the instrumentation to be used for the

measurements and observations to be made on the Reactor Building of the Three Mile

Island Nuclear Station, Unit No. 1, during the Structural Integrity test. This test is to

ascertain the response of the structure when subjected to a maximum internal pressure

of 63.3 psig which is 15 percent in excess of 55 psig (the design pressure due to the

maximum hypothetical accident).

2. DESCRIPTION OF CONTAINMENT STRUCTURE

2.1 LOCATION

The Three Mile Island Nuclear Station, Unit No. 1 is located on Three Mile Island, near the east shore of the SusquehannaRiver in Londonderry Township, Dauphin County, Pennsylvania. The site is located approximately 11 miles SE of Harrisburg, Pennsylvania.

2.2 GEOMETRY

AND PRINCIPAL ELEMENTS

The Reactor Building is a reinforced concrete structure composed of a cylindrical wall with a flat foundation mat and a shallow dome roof. The foundation slab is reinforced

with conventional mild-steel reinforcing. The cylindrical walls are prestressed with a

post-tensioning system in the vertical and horizontal directions. The dome roof is

prestressed utilizing a three way post tensioning system. The inside surface of the

Reactor Building is lined with a carbon steel liner to ensure a high degree of tightness

during operating and accident conditions. Nominal liner plate thickness is 3/8 inch for

the cylinder and dome and 1/4 inch for the base.

The foundation mat is bearing on sound rock and is 9 feet thick with a 2 feet thick concrete slab above the bottom liner plate. The cylinder portion has an inside diameter

of 130 feet, wall thickness or 3 feet 6 inch, and a height of 156 ft. from top of foundation

slab to the spring line. The shallow dome roof has a large radius of 10 feet, a transition

radius of 20 feet 6 inch and a thickness of 3 feet. The Reactor Building Cross Section is

shown in Figure 1.

Two large openings are provided for access into the containment structure: one is of a 22 feet 4

inches inside diameter opening for the equipment access hatch, the other is a 9 feet 6 inches

inside diameter opening for the personnel lock. Penetrations for the main steam, feedwater, purge air, other mechanical process pipe and electrical cables are also provided in the cylinder

wall. Drawings and description of the containment structure are provided in the Final Safety

Analysis Report.

2.3 MATERIALS

2.3.1 Liner

The basic liner plate conforms to ASTM A283-67, Grade C with a minimum yield point of 30,000 psi. Non-accessible liner seams are covered with A36 steel test channels to

permit leak testing. Penetration sleeves through the containment barrier consist TMI-1 UFSAR APPENDIX 5E 5E-2 REV. 20, APRIL 2010 normally of material conforming to ASTM A-333, Grade 1 or to ASTM A-516 Grade 60 modified to ASTM A-300.

2.3.2 Mild Steel Reinforcement

The mild steel reinforcement in the cylinder, dome, and reinforcement in the mat conforms to ASTM A 615-68, Grade 40. The reinforcing steel provides capacity in

bending and shear only for the typical cylindrical wall and dome roof. The mat

reinforcing steel provides capacity in tension, bending, and shear.

Special large size bars were spliced by the Cadweld process using splices designed to develop the ultimate strength of the bar. All bars of size number 11 or smaller were lap

spliced, except for some rebars in the ring girder.

To support the 2009 SGR Project, a Containment Opening was made in the Reactor Building concrete wall and liner plate at the 290° azimuth, and directly above the existing Equipment Hatch to gain building access for rigging and handling of the steam generators. In order to restore the concrete opening, new rebar was spliced to existing No. 11 and No. 8 rebar using BarSplice BPI XI swaged couplers, which consisted of a cold-swaged sleeve installed using a portable hydraulic press and a pair of swaging dies. As an acceptable design equivalent to cadweld splicing of rebar, these mechanical splice devices complied with ASME Section III, Div. 2, Subsection CC to be capable of developing not less than 125% of the specified yield strength of the bars in question.

For areas where mechanical splices could not be used, direct-butt fusion welded splices were employed. Welded splices were welded and inspected in accordance with AWS D1.4-1998, Structural Welding Code - Reinforcing Steel. A new vertical rebar configuration and additional horizontal rebar was added to the outside face of the Containment Opening in order to meet design acceptance criteria due to post-construction loading. Additionally, a new interior rebar mat was installed adjacent to the liner plate within the Containment Opening to carry the bending loads associated with post-tensioning of tendons on the inside face.

2.3.3 Concrete

The concrete mix used in the cylinder, dome, and mat was designed to develop 5,000 psi compressive strength in 28 days and included the use of admixtures for air

entrainment and water reduction.

2.3.4 Tendons

The prestressing system used for the Reacto r Building is the BBRV system utilizing a maximum of 169 1/4 in. diameter wires. These wires conform to ASTM A-421 with a

minimum ultimate strength of 240,000 psi and incorporate the use of BBRV bottom head

system for end anchorages. The tendons are encased in galvanized steel conduits.

The tendons and included anchorages are coated with a temporary corrosion inhibitor for protection prior to bulk-filling the conduit.

2.4 DESIGN

TMI-1 UFSAR APPENDIX 5E 5E-3 REV. 20, APRIL 2010 The methods used for the design of the structure, including assumptions on the interaction of steel liner and concrete shell, are described in the Final Safety Analysis

Report.

2.5 CONSTRUCTION

METHODS

In order to describe the basis for establishing "as-built" conditions, only special construction procedures are enumerated. The containment liner in the cylinder and

dome is erected independent of the placement of the concrete shell. Survey control was

used to ascertain actual liner and concrete shell dimensions during construction.

Flexural reinforcement is located on the outside face relative to the horizontal wall tendons and on the inside face relative to the liner. Concrete forms are tied on

approximately 5 feet centers to the liner. Minimum concrete cover requirements are

shown on the drawings.

The dome tendon conduits are pre-bent and cut to the total length required for the tendons from one trumplate assembly to the other. The vertical wall tendon conduits are

terminated at the anchor plates in top of the ring girder. Dome concrete was not placed

until after tendon conduits, trumpets, anchor plates, and reinforcing bars were installed.

The anchor plates are located and installed relative to the tendon conduits; and the

necessary pockets were provided in the vertical side of the ring girder. The dome

tendon conduits and reinforcing steel are blocked from the liner and located relative to

the theoretical location and not the liner.

The tendons are stressed after the cylinder wall and dome concrete has been placed and cured. The vertical tendons are stressed first. The stressing operation starts at four

positions along the circumference of the cylinder. The sequence of stressing the vertical

tendons is approximately symmetrical with respec t to the cylindrical wall circumference.

After completion of the vertical tendons, the dome and horizontal wall tendons are

installed and stressed in a sequence so as to minimize stress concentration in the shell.

3. TEST REQUIREMENTS

3.1 PRELIMINARY

SAFETY ANALYSIS REPORT

The Preliminary Safety Analysis Report, Section 5.0 and Appendix 5F, Reactor Building Instrumentation, provided background information on initial commitments to the AEC on

the subject of instrumentation and measurements to be made during the structural proof

test.

4. TEST PROCEDURES

4.1 GENERAL

DESCRIPTION

After completion of the construction of the entire containment vessel, a structural integrity test will be performed where a pneumatic pressure at 63.3 psig (115 percent of

the design pressure of 55 psig) will be maintained for a minimum of one hour. The

pressurization of the vessel will be performed so as to permit readings and

measurements more fully described hereafter to be made during the initial pressurization

at 0 psig, 30 psig, 45 psig, 55 psig, at final test pressure of 63.3 psig, and thereafter TMI-1 UFSAR APPENDIX 5E 5E-4 REV. 20, APRIL 2010 during depressurization at 55 psig, 45 psig, 30 psig, and 0 psig. Except for the maximum pressure level (63.3 psig), the vessel pressure will always be stopped at 0.1

psi above the level at which the measurem ents will be made, and the pressure will then be slowly reduced to the specified value and held for 60 minutes to permit an adjustment

of strains within the structure. Observations will be made and data taken after the 60

minute hold.

Because the structure is so large, displacement measurements can be made with sufficient precision to serve as confirmation of previously calculated response. The test

program further includes, in addition to displacement measurements, a continuous visual examination for concrete cracks of the Reactor Building exterior concrete surfaces, that

can be observed from existing or temporary pl atforms, with special attention given to pertinent locations such as major discontinuities. An ideal schedule has been

determined as an aid in planning a detailed procedure for the Structural Integrity Test. A

description of the instrumentation used to measure response is included in Section 5 of

this report. Predited displacements developed for an internal pressure of 63.3 psig, which is the pressure for the structural proof test, is included in Section 7 of this report.

Strain values obtained, however, will be analyzed to determine magnitude and direction

of principal strains.

Maximum cracks widths are described in Section 7.

4.2 PREPARATION

The installation of all targets, LVDT'S, white wash for crack pattern areas, tapes, strain gages, junction boxes, cables, read-out instruments, support structures, and platforms

must be completed prior to initiating pressurization of the vessel. The location for

instrumentation is shown in Table 1.

The strain gages for reinforcing bars are waterproofed and protected to permit encasement in the concrete. It is recognized that prior to the test, when each strain

gage is being checked out, malfunction of gages may occur. Therefore, in order to avoid

having to remove concrete to regain access to the gage, two gages have been installed

at each specified location. One gage has been installed, wired, waterproofed, and

protected directly to the main reinforcing steel in the shell outer surface.

The other gage "dummy gage," has been wired, waterproofed, and protected to a No. 4, 3 feet long reinforcing bar, and installed adjacent to the first gage.

Prior to the start of the structural integrity test, the inside air temperature will be controlled so that the air temperature reaches a steady-state condition two to three days

before the start of the structural integrity test.

The outside air temperature will vary, but due to the relatively short period of time involved in the structural integrity test, it is expected that the fluctuation of the outside air

temperature will not affect the temperature in the concrete shell.

In order to verify the above, both inside and outside air temperature readings will be taken and recorded at least twice daily for two weeks prior to the start of the structural

integrity test and at each pressure level shown on Figure 2 during the structural integrity

test.

TMI-1 UFSAR APPENDIX 5E 5E-5 REV. 20, APRIL 2010 After completion of the structural integrity test, the temperature data will be reviewed.

4.3 DURING

TEST

All acquired data and general observations will be transmitted to the control center.

Data will be tabulated on the sheets typically shown in Tables 2 through 7 and will be

graphically shown on Figures 12 through 22 to ensure immediate comparison with

predicted results.

TMI-1 UFSAR APPENDIX 5E 5E-6 REV. 20, APRIL 2010

4.4 FOLLOWING

TEST

All acquired data plus interpretations of the results will be incorporated in this report. If the test data include any displacements whic h are in excess of the predicted extremes, such discrepancies will be resolved by means of including a review of the design, evaluation of measurement errors, material variability, and possibly exploration of the

structure.

The test data obtained during the structural integrity test will be interpreted and compared with the analytical values. The analytical values have been obtained using

the same method of analysis as was used for the design of the containment structure. If

the test values do not show good agreement with the analytical values, the

discrepancies will be resolved or the design safety margin will be reviewed.

5. INSTRUMENTATION

The behavior of the containment vessel will be observed during the structural proof test by making strain and displacement measurements. In addition, crack spacing and width

will be observed.

5.1 GENERAL

DESCRIPTION

The type of instruments used are shown on Figures 3, 4, 5, and 6. These are:

Displacement Measurements

a. Jig Transits with scales and targets

b. Levels

c. Invar tapes

d. LVDT (Displacement Transducers)

Strain Measurements

a. Strain gages

b. Rosette strain gages

5.1.1 Displacement

Measurements

Cylinder displacements will be measured at:

Three locations using jig transits and several scales at each location

Three locations using precision levels and rods

Three locations using Invar tapes and precision levels

One location using Invar tape and LVDT (Linear Variable Displacement Transducers)

Forty-one locations using LVDT'S TMI-1 UFSAR APPENDIX 5E 5E-7 REV. 20, APRIL 2010

a. Jig Transits

Three jig transits (one at each of the 3 azimuths) will be permanently set up and sheltered on the roof of auxiliary building, control building, and intermediate

building. Two scales will be attached on the ring girder at each azimuth; the

remaining scales are attached to the cylinder wall: four at one azimuth, three at

another azimuth, and two at the third azimuth. Bare targets will be attached

directly to the concrete roof structure at each of the three azimuths. Relative

radial displacement will be determined at each scale location by aligning the

transit with the base target and by plunging the scope up from the base target to

each scale. Variations in the scale readings from the original reading will

indicate the amount of displacement.

b. Precision Levels

Vertical displacements of the mat at Elevation 279 feet 0 in. outside the Reactor Building will be measured utilizing precision levels. Three levels will be needed, one at each azimuth, and will be located above grade. The levels will not be

placed within 40 feet of the Reactor Building. This location should eliminate

possible minute ground movements during pressurization of the vessel. A

precise surveyors rod (at each azimuth) will be attached to the mat at Elevation

279 feet 0 inches.

c. Invar Tapes

Vertical displacements of the cylinder at the top of the ring girder, for side wall elongation and average tendon strain, will be determined using three Invar tapes (or equal) at three azimuths. The tapes will be mounted at the ledge (top of the

ring girder) and will extend down to grade level, where weights will tension the

tapes. The weights will be dampened in 10 gallon drums of oil. The tapes must

be protected against oscillation due to wind. A scale attached to the tape will be

read, with the same precision levels described under Item b, to indicate relative

elongation.

The fourth Invar tape will be attached to the apex of the reactor building liner and extend down to the operating floor. Weight will tension the tape and will be

dampened in a 10 gallons drum of water. An LVDT will be attached to the tape

and vertical dome displacements read at the control center.

d. LVDT

Radial displacements will be measured with the LVDT'S at three azimuths (12 LVDT'S total) at the base of the cylinder wall.

LVDT'S will be utilized at 28 locations attached to the concrete surface around the equipment access opening to measure horizontal and vertical displacements.

Along the horizontal axis, eight horizontal and eight vertical displacements will

be obtained to a point forty four feet from the centerline of the hole. Along the

vertical axis, six horizontal and six vertical displacements will be obtained to a TMI-1 UFSAR APPENDIX 5E 5E-8 REV. 20, APRIL 2010 point thirty one feet and six inches above the centerline of the equipment access opening.

Rigid support structures for the 40 LVDT'S will be built, properly braced and protected due to changes in weather.

e. Instrument Accuracy

Displacement measurement accuracies will be as follows: The jig transit with an optical micrometer will have a resolution of 0.001 inch and an accuracy of 0.005

to 0.010 inch. The LVDT'S and associated instrumentation will have a resolution

of better than 0.001 inch and an accuracy of 0.002 to 0.005 inch.

5.1.2 Strain

Measurements

a. Reinforcing Bar Strain Gages A total of 74 reinforcing bars will be instrumented for strain measurement; 28 at locations similar to LVDT displace ment measurements around the equipment access opening, and 46 at locations above and below the ledge.

b. Liner Rosette Strain Gages

The liner will be instrumented with rectangular rosettes at six locations to indicate general strain in regions unaffected by geometric discontinuities and at 42

locations around three typical penetrations. Fourteen rosettes will be used at

each penetration.

c. Strain Gage Accuracy

The strain gages on reinforcing bars and associated instrumentation will have a resolution of 0.4 microinch per inch strain and an accuracy of two to three

microinches per inch. The strain gages on the steel liner will have a resolution of

one microinch per inch and an accuracy of approximately five microinches.

5.1.3 Concrete

Crack Measurement

The accessible portions of the Reactor Building will be visually inspected for cracks and crack patterns from both the ground and the available scaffolding at the time of the test.

Any observed cracks greater than 0.005 inch width shall be charted.

Approximately 1450 square feet of the outside surface of the containment vessel will be whitewashed for detailed measurement of spacing and width of cracks to confirm the

magnitude of the local strains are not excessive. The whitewash areas are as follows:

an area of approximately six foot width of the structure at the dome-to-cylinder transition extending six feet above and below the ledge and including ring girder area; three areas

of approximately 6 feet width of the ring girder extending from elevation 439 feet 0

inches to elevation 451 feet 0 inches; and an area six feet by six feet on the cylinder at

elevation 360 feet 0 inches; and an area six feet by ten feet at the base of cylinder wall.

In addition, an area approximately 28 feet by 32 feet at one upper quadrant of the

equipment access opening will be whitewashed.

TMI-1 UFSAR APPENDIX 5E 5E-9 REV. 20, APRIL 2010 A one foot by one foot grid system will be laid out over the entire whitewashed area.

Platforms will be provided for access and protective covers will be provided against

adverse weather. All cracks shall be plotted for each pressure level when pressurizing, and at 0 psig after completion of the pressure test; but only those cracks width

measurements greater then 0.005 inch shall be recorded on the plots. Optical

instruments shall be used for measurement of crack widths.

5.1.4 Tendon

Anchorage Zone Inspection

The results of the structural integrity test for the Robert E. Ginna Nuclear Power Station, which are presented in "Structural Integrity Test of Reactor Containment Structure" prepared for Westinghouse Electric Corporation, Atomic Power Division, and for

Rochester Gas and Electric Corporation by Gilbert Associates, Inc. (GAI Report No.

1720 includes strains obtained from load cells installed under the tendon button heads

and strain gages installed on the tendon bearing plates for four vertical tendons.

Although the results obtained from both the load cells and strain gages were in general

agreement with the predicted behavior, the results did not appreciably aid in the

evaluation of the behavior of the containment structure. This was due to the fact that the

strains which were recorded were due only to the increase in tendon force resulting from

the pressure loading. This increase amounts to only a small percentage of the total

force in the tendon.

The tendons installed in the containment structure of the Three Mile Island Nuclear Station Unit 1 will behave in a manner similar to the tendons installed in the containment

structure of the Robert E. Ginna Nuclear Power Station. Specifically, the increase in

tendon force due to the pressure loading amounts to only about five percent of the

original tendon force for the hoop and dome tendons and 2 1/2 percent for the vertical

tendons. Because of the above and, also because of the testing of the post- tensioning

system as described in Appendix 5B, tendon load cells and bearing plate strain gages

will not be installed on the containment structure.

The tendon anchorage zone inspection will include the following:

a. A visual inspection of the concrete in the area of accessible anchorage zones both prior to the start of the structural integrity test and at each pressure level

shown on Figure 2 during the structural integrity test.

b. One tendon anchorage zone for vertical tendons V-81 and V-82 and dome tendons 327, 328, and 329 are included in white-wash area No. 120, "Wall and

Dome Junction," shown on Figure 8. These anchorage zones will be examined

at each pressure level when pressurizing and at 0 psig after completion of the

pressure test.

Any unusual observations will be recorded on Table 7, "Tendon Anchorage Observations" and evaluated.

TMI-1 UFSAR APPENDIX 5E 5E-10 REV. 20, APRIL 2010 6 AS BUILT CONDITIONS

A survey of the "as built" conditions of the reactor building shell will be performed after completion of the construction. Radial distances from the established centerpoint of the

containment vessel to the inside face of the liner plate will be measured at various

elevations and azimuths prior to the test. The centerpoint was established prior to the

erection of the liner plate and shell concrete.

7 CALCULATED RESPONSE

7.1 GENERAL

DESCRIPTION

Displacements of the reactor building under pressure have been computed at several points on the vessel. A graph for each of these points (a total of 62) shows the limiting

displacement at a pressure equal to 63.3 psig. The displacements at this pressure level

include a 20 percent increase to allow for potential errors in measurements. Pressure

versus displacements will be plotted at p = 0, 30, 45, 55, and 63.3 psig during

pressurization; and at p = 55, 45, 30, and 0 psig during depressurization. The curves so

plotted during the test are limited by:

a. The horizontal line at p = 63.3 psig

b. The vertical line labeled "limiting displacement"

A typical predicted radial displacement curve of the Reactor Building is shown on Figure

7.

Stress cracking from the applied pressure loading is not anticipated due to the residual compressive stress remaining in the shell at the pressure peak of 63.3 psig. But existing

shrinkage cracks would enlarge slightly in width and also propagate in length during pressurization of the Reactor Building. Also, some new hairline cracks may occur that

were not initially observed. The crack pattern will be random and the crack width

enlargement should be less than 0.010 inch. Figures 8, 9, 10, and 11 show the

configurations and locations of the crack pattern areas and are noted as to the cracking

which might occur. Copies of these same figures will be used to record any cracking

that does occur.

Local larger crack widths could appear, and will then be evaluated with related parameters as to its effect on the overall structural integrity.

7.2 CALCULATED

DISPLACEMENTS

The calculated displacements for each radial and vertical measurement point (the scales, LVDT'S, and tapes) are shown on Figures 12 through 22: also, the measured

values will be plotted on their respective graph. The graphs or instrument locations are

enumerated as follows:

a. Cylinder base radial displacements, LVDT gage location 1-6, are shown on Figure 12.

TMI-1 UFSAR APPENDIX 5E 5E-11 REV. 20, APRIL 2010

b. Cylinder base and wall radial displacements, LVDT gage locations 7-12, are shown on Figure 13.

c. Cylinder wall and dome radial displacements, scale locations 13-24, are shown on Figures 14 and 15.

d. Dome radial displacements and cylinder ledge (top of ring girder) vertical displacements, scale locations 25-27, and tape locations 28-30 are shown on

Figure 16.

e. Cylinder base and dome apex vertical displacements, rod locations 31-33, and LVDT gage location 34 are shown on Figure 17.

f. Equipment access, radial and vertical displacements, LVDT gage locations 35-48. See Figures 18, 19, 20, 21, and 22.

7.3 MEASUREMENT, ANALYSIS, AND CONSTRUCTION INACCURACIES

Accepted standards for comparison of displacement measurements with predicted displacements are based upon increasing predicted displacements for the 63.3 psig

pressure by 20 percent. This reflects all variables, including precision of measurements, design variables such as accuracy of design loads and analysis techniques, and

construction variables such as variation of dimensions.

8. FORMS FOR RECORDING THE MEASURED DISPLACEMENTS, STRAINS, TEMPERATURE, AND TENDON ANCHORAGE OBSERVATIONS

The forms for recording the measured displacements, strains, temperatures, and tendon anchorage observations during the test are shown on:

Table 2 - Strain Gages Full Bridge Table 3 - Strain Gages Rosettes Table 4 - Displacement LVDT'S Table 5 - Displacement Scales and Tapes Table 6 - Temperature Readings Table 7 - Tendon Anchorage Observations - Wire Failures

9 INTERPRETATION OF RESULTS

The displacements, strains and observations data and crack pattern charts will be included in a report along with the interpretation and conclusions of the Structural

Integrity Test. This report will be filed with the AEC.

TMI-1 UFSAR APPENDIX 5E 5E-12 REV. 20, APRIL 2010 TABLE 5E-1 (Sh. 1 of 4)

INSTRUMENT LOCATION

The location of displacement measurements are as follows:

1-1 Cylinder Base Radial Displacement -- LVDT

LVDT Gage Loc. Elevation Azimuth Notes

1,2,3 284'-0" 108º, 243º, 352º Radial Displacement 4,5,6 294'-0" 108º, 243º, 352º Radial Displacement 7,8,9 326'-0" 108º, 243º, 348º Radial Displacement 10,11 358'-0" 108º, 348º Radial Displacement 12 390'-0" 108º Radial Displacement

1-2 Cylinder Wall and Dome Radial Displacement - Jig Transit and Scales

Scale Loc. Elevation Azimuth Notes

13 358'-0" 245º Radial Displacement 14,15 390'-0" 245º, 352º Radial Displacement 16,17,18 422'-0" 108º, 245º, 352º Radial Displacement 19,20,21 432'-0" 108º, 245º, 352º Radial Displacement 22,23,24 439'-2" 108º, 245º, 352º Radial Displacement 25,26,27 453'-6" 108º, 245º, 352º Radial Displacement

1-3 Cylinder Ledge and Base Vertical Displacement - Invar Tape, Rod and Level

Tape & Rod Loc. Elevation Azimuth Notes

28,29,30 453'-6" 132º, 247º, 11º Wall-Vertical Displacement 31,32,33, 279'-0" 131º, 248º, 9º Base-Vertical Displacement 34 468'-4-1/8" Dome Apex See Dome Vertical Displ.

1-4 Dome Apex Vertical Displacement - Invar Tape and LVDT

Tape Location Elevation Location Notes

34 468'-4-1/8" Dome Apex

TMI-1 UFSAR APPENDIX 5E 5E-13 REV. 20, APRIL 2010 Table 5E-1 (Sh. 2 of 4)

1-5 Equipment Access Opening Displacement - LVDT

LVDT Gage Loc. Elevation Notes

35,37,38,39,40,41,42 319'-2" Radial Displacement 35,37,38,39,40,41,42 319'-2" Vertical Displacement 36 307'-2" Radial Displacement 36 307'-2" Vertical Displacement 43 331'-2" Radial Displacement 43 331'-2" Vertical Displacement 44 354'-7-3/4" Radial Displacement 44 354'-7-3/4" Vertical Displacement 45 338'-8" Radial Displacement 45 338'-8" Vertical Displacement 46 342'-8" Radial Displacement 46 342'-8" Vertical Displacement 47 346'-8" Radial Displacement 47 346'-8" Vertical Displacement 48 350'-8" Radial Displacement 48 350'-8" Vertical Displacement

The location of strain measurements are as follows:

1-6 Equipment Access Opening - Reinforcing Bar Strain

Strain Gage Loc. Elevation Notes

35,37,38,39,40,41,42 319'-1" Hoop Strain 35,37,38,39,40,41,42 319'-2" Meridional Strain 36 307'-2" Hoop Strain 36 307'-2" Meridional Strain 43 331'-2" Hoop Strain 43 331'-2" Meridional Strain 44 334'-5" Hoop Strain 44 334'-5" Meridional Strain

TMI-1 UFSAR APPENDIX 5E 5E-14 REV. 20, APRIL 2010 Table 5E-1 (Sheet 3 of 4)

Strain Gage Loc. Elevation Notes

45 338'-8" Hoop Strain 45 338'-8" Meridional Strain 46 342'-8" Hoop Strain 46 342'-8" Meridional Strain 47 346'-8" Hoop Strain 47 346'-8" Meridional Strain 48 350'-8" Hoop Strain 48 350'-8" Meridional Strain

1-7 Cylinder Wall and Dome Junction - Reinforcing Bar Strain

Strain Gage Loc. Elevation Azimuth Notes

49,50,51 430'-0" 108º, 245º, 352º Wall-Meridional Strain 49,50,51 430'-0" 108º, 245º, 352º Wall-Hoop Strain 52,53,54 435'-0" 108º, 245º, 352º Wall-Meridional Strain 52,53,54 435'-0" 108º, 245º, 352º Wall-Hoop Strain 55,56,57 440'-0" 108º, 245º, 352º Ring Girder-Mer. Strain 55,56,57 440'-0" 108º, 245º, 352º Ring Girder-Hoop Strain 58,59,60 446'-0" 108º, 245º, 352º Ring Girder-Mer. Strain 58,59,60 446'-0" 108º, 245º, 352º Ring Girder-Hoop Strain 61,62,63 452'-0" 108º, 245º, 352º Ring Girder-Mer. Strain 61,62,63 452'-0" 108º, 245º, 352º Ring Girder-Hoop Strain 64,65,66 454'-0" 108º, 245º, 352º Dome-Meridional Strain 64,65,66 454'-0" 108º, 245º, 352º Dome-Hoop Strain 67,68,69 458'-0" 108º, 245º, 352º Dome-Meridional Strain 67,68,69 458'-0" 108º, 245º, 352º Dome-Hoop Strain 129,130 446'-0" 80º, 320º Ring Girder-Hoop Strain 129,130 446'-0" 80º, 320 Ring Girder-Mer. Strain

TMI-1 UFSAR APPENDIX 5E 5E-15 REV. 20, APRIL 2010 Table 5E-1 (Sh. 4 of 4) 1-8 Liner Strain-Rosettes

Rosette Strain Gage Loc. Elevation Azimuth Notes

70,71,72 358'-0" 108º, 245º, 352º Liner Strain 73,74,75 390'-0" 108º, 245º, 352º Liner Strain

1-9 Liner Strain at Penetrations - Rosettes

Rosette Strain Gage Loc. Elevation Azimuth Notes

76,77,78,79,80,81,82 337'-0" 7º 47' 30" Main Steam Penetration

83,84,85,86,87,88,89 337'-8" 7º 47' 30" Main Steam Penetration

90,91,92,93,94,95,96 316'-1-11/16" 7º 47' 30" Feedwater Penetration

97,98,99,100,101,102,103 316'-1-11/16" 7º 47' 30" Feedwater Penetration

104,105,106,107,108, 317-6" 331º 39' 50" R.B. Leak Test Press.

109,110 Sensing

111,112,113,114,115, 317'-6" 331º 39' 50" R.B. Leak Test Pressure 116,117, Sensing

White Wash of Reactor Building:

1-10 White Wash - Crack Pattern and Spacing

Area No. Elevation Azimuth

118 284'-0" 175º 119 360'-0" 175º 120 453'-6" 175º 121 319'-2" Equipment Access Opening 131 445'-0" 22º 132 445'-0" 320º 133 445'-0" 350º

Temperature Check Points:

1-11 Ambient Temperature

Thermometer Loc. Elevation Azimuth

122,123 456'-0" 245º, 352º 124,125 380'-0" 245º, 352º 126,127 380'-0" 245º, 352º 128 Average Temperature inside the Containment Vessel

TMI-1 UFSAR APPENDIX 5E 5E-16 REV. 18, APRIL 2006

TMI-1 UFSAR APPENDIX 5E 5E-17 REV. 18, APRIL 2006

TMI-1 UFSAR APPENDIX 5E 5E-18 REV. 18, APRIL 2006

TMI-1 UFSAR APPENDIX 5E 5E-19 REV. 18, APRIL 2006

TMI-1 UFSAR APPENDIX 5E 5E-20 REV. 18, APRIL 2006

TMI-1 UFSAR APPENDIX 5E 5E-21 REV. 18, APRIL 2006

TMI-1 UFSAR APPENDIX 5E 5E-i REV. 18, APRIL 2006

APPENDIX 5E

GILBERT ASSOCIATES, INC., PRELIMINARY REPORT

TO METROPOLITAN EDISON COMPANY

ON STRUCTURAL INTEGRITY TESTING OF THE REACTOR BUILDING STRUCTURE

FOR THREE MILE ISLAND NUCLEAR STATION UNIT 1

This Report Contains:

24 pages of text 7 tables 22 figures

TMI-1 UFSAR APPENDIX 5E 5E-ii REV. 18, APRIL 2006 November 5, 1969 GAI REPORT NO. 1710

PRELIMINARY REPORT ON STRUCTURAL INTEGRITY TESTING OF REACTOR BUILDING STRUCTURE FOR THREE MILE ISLAND NUCLEAR STATION UNIT 1 METROPOLITAN EDISON COMPANY

Gilbert Associates, Inc.

525 Lancaster Avenue Reading, Pennsylvania

TMI-1 UFSAR APPENDIX 5E 5E-iii REV. 18, APRIL 2006 TABLE OF CONTENTS

1. PURPOSE

2. DESCRIPTION OF CONTAINMENT STRUCTURE

2.2 GEOMETRY

AND PRINCIPAL ELEMENTS

2.3 MATERIALS

2.3.1 Liner

2.3.2 Mile Steel Reinforcement

2.5 CONSTRUCTION

METHODS

3. TEST REQUIREMENTS

3.1 PRELIMINARY

SAFETY ANALYSIS REPORT

4. TEST PROCEDURES

4.1 GENERAL

DESCRIPTION

4.3 DURING

TEST

4.4 FOLLOWING

TEST0

5. INSTRUMENTATION

5.1 GENERAL

DESCRIPTION

5.1.1 Displacement

Measurements

5.1.2 Strain

Measurements

5.1.4 Tendon

Anchorage Zone Inspection6

6. AS BUILT CONDITIONS

7. CALCULATED RESPONSE

7.1 GENERAL

DESCRIPTION

7.2 CALCULATED

DISPLACEMENTS 7.3 MEASUREMENT, ANALYSIS, AND CONSTRUCTION INACCURACIES

8. FORMS FOR RECORDING THE MEASURED DISPLACEMENTS, STRAINS, TEMPERATURE, AND TENDON ANCHORAGE OBSERVATIONS

9. INTERPRETATION OF RESULTS

TABLES FIGURES TMI-1 UFSAR APPENDIX 5E 5E-iv REV. 18, APRIL 2006 LIST OF TABLES

Table 1 Instrument Location

Table 2 Strain Gages Full Bridge

Table 3 Strain Gages Rosettes

Table 4 Displacement LVDT'S

Table 5 Displacement Scales and Tapes

Table 6 Temperature Readings

Table 7 Tendon Anchorage Observations - Wire Failures

TMI-1 UFSAR APPENDIX 5E 5E-v REV. 18, APRIL 2006 LIST OF FIGURES

Number Title 5E-1 Reactor Building - Cross Section

5E-2 Ideal Schedule

5E-3 Instrumentation - Outside Face

5E-4 Instrumentation - Inside Face

5E-5 Instrumentation - Equipment Access - Outside Face

5E-6 Instrumentation - Penetrations - Interior Face

5E-7 Radial Displacements of Reactor Building

5E-8 Crack Patterns - Wall and Dome Junction

5E-9 Crack Patterns - Wall

5E-10 Crack Patterns - Equipment Access

5E-11 Crack Patterns - Concrete Ring Beam Area

5E-12 Cylinder Base Radial Displacement

5E-13 Cylinder Base and Wall Radial Displacement

5E-14 Cylinder Wall and Dome Radial Displacement

5E-15 Cylinder Wall and Dome Radial Displacement

5E-16 Dome Radial Displacement and Cylinder Ledge Vertical Displacement

5E-17 Base and Dome Apex Vertical Displacement

5E-18 Equipment Access Displacement

5E-19 Equipment Access Displacement

5E-20 Equipment Access Displacement

5E-21 Equipment Access Displacement

5E-22 Equipment Access Displacement

TMI-1 UFSAR APPENDIX 5E 5E-1 REV. 20, APRIL 2010

1. PURPOSE

The purpose of this report is to present pertinent information on the design and materials of the Reactor Building; and to outline the instrumentation to be used for the

measurements and observations to be made on the Reactor Building of the Three Mile

Island Nuclear Station, Unit No. 1, during the Structural Integrity test. This test is to

ascertain the response of the structure when subjected to a maximum internal pressure

of 63.3 psig which is 15 percent in excess of 55 psig (the design pressure due to the

maximum hypothetical accident).

2. DESCRIPTION OF CONTAINMENT STRUCTURE

2.1 LOCATION

The Three Mile Island Nuclear Station, Unit No. 1 is located on Three Mile Island, near the east shore of the SusquehannaRiver in Londonderry Township, Dauphin County, Pennsylvania. The site is located approximately 11 miles SE of Harrisburg, Pennsylvania.

2.2 GEOMETRY

AND PRINCIPAL ELEMENTS

The Reactor Building is a reinforced concrete structure composed of a cylindrical wall with a flat foundation mat and a shallow dome roof. The foundation slab is reinforced

with conventional mild-steel reinforcing. The cylindrical walls are prestressed with a

post-tensioning system in the vertical and horizontal directions. The dome roof is

prestressed utilizing a three way post tensioning system. The inside surface of the

Reactor Building is lined with a carbon steel liner to ensure a high degree of tightness

during operating and accident conditions. Nominal liner plate thickness is 3/8 inch for

the cylinder and dome and 1/4 inch for the base.

The foundation mat is bearing on sound rock and is 9 feet thick with a 2 feet thick concrete slab above the bottom liner plate. The cylinder portion has an inside diameter

of 130 feet, wall thickness or 3 feet 6 inch, and a height of 156 ft. from top of foundation

slab to the spring line. The shallow dome roof has a large radius of 10 feet, a transition

radius of 20 feet 6 inch and a thickness of 3 feet. The Reactor Building Cross Section is

shown in Figure 1.

Two large openings are provided for access into the containment structure: one is of a 22 feet 4

inches inside diameter opening for the equipment access hatch, the other is a 9 feet 6 inches

inside diameter opening for the personnel lock. Penetrations for the main steam, feedwater, purge air, other mechanical process pipe and electrical cables are also provided in the cylinder

wall. Drawings and description of the containment structure are provided in the Final Safety

Analysis Report.

2.3 MATERIALS

2.3.1 Liner

The basic liner plate conforms to ASTM A283-67, Grade C with a minimum yield point of 30,000 psi. Non-accessible liner seams are covered with A36 steel test channels to

permit leak testing. Penetration sleeves through the containment barrier consist TMI-1 UFSAR APPENDIX 5E 5E-2 REV. 20, APRIL 2010 normally of material conforming to ASTM A-333, Grade 1 or to ASTM A-516 Grade 60 modified to ASTM A-300.

2.3.2 Mild Steel Reinforcement

The mild steel reinforcement in the cylinder, dome, and reinforcement in the mat conforms to ASTM A 615-68, Grade 40. The reinforcing steel provides capacity in

bending and shear only for the typical cylindrical wall and dome roof. The mat

reinforcing steel provides capacity in tension, bending, and shear.

Special large size bars were spliced by the Cadweld process using splices designed to develop the ultimate strength of the bar. All bars of size number 11 or smaller were lap

spliced, except for some rebars in the ring girder.

To support the 2009 SGR Project, a Containment Opening was made in the Reactor Building concrete wall and liner plate at the 290° azimuth, and directly above the existing Equipment Hatch to gain building access for rigging and handling of the steam generators. In order to restore the concrete opening, new rebar was spliced to existing No. 11 and No. 8 rebar using BarSplice BPI XI swaged couplers, which consisted of a cold-swaged sleeve installed using a portable hydraulic press and a pair of swaging dies. As an acceptable design equivalent to cadweld splicing of rebar, these mechanical splice devices complied with ASME Section III, Div. 2, Subsection CC to be capable of developing not less than 125% of the specified yield strength of the bars in question.

For areas where mechanical splices could not be used, direct-butt fusion welded splices were employed. Welded splices were welded and inspected in accordance with AWS D1.4-1998, Structural Welding Code - Reinforcing Steel. A new vertical rebar configuration and additional horizontal rebar was added to the outside face of the Containment Opening in order to meet design acceptance criteria due to post-construction loading. Additionally, a new interior rebar mat was installed adjacent to the liner plate within the Containment Opening to carry the bending loads associated with post-tensioning of tendons on the inside face.

2.3.3 Concrete

The concrete mix used in the cylinder, dome, and mat was designed to develop 5,000 psi compressive strength in 28 days and included the use of admixtures for air

entrainment and water reduction.

2.3.4 Tendons

The prestressing system used for the Reacto r Building is the BBRV system utilizing a maximum of 169 1/4 in. diameter wires. These wires conform to ASTM A-421 with a

minimum ultimate strength of 240,000 psi and incorporate the use of BBRV bottom head

system for end anchorages. The tendons are encased in galvanized steel conduits.

The tendons and included anchorages are coated with a temporary corrosion inhibitor for protection prior to bulk-filling the conduit.

2.4 DESIGN

TMI-1 UFSAR APPENDIX 5E 5E-3 REV. 20, APRIL 2010 The methods used for the design of the structure, including assumptions on the interaction of steel liner and concrete shell, are described in the Final Safety Analysis

Report.

2.5 CONSTRUCTION

METHODS

In order to describe the basis for establishing "as-built" conditions, only special construction procedures are enumerated. The containment liner in the cylinder and

dome is erected independent of the placement of the concrete shell. Survey control was

used to ascertain actual liner and concrete shell dimensions during construction.

Flexural reinforcement is located on the outside face relative to the horizontal wall tendons and on the inside face relative to the liner. Concrete forms are tied on

approximately 5 feet centers to the liner. Minimum concrete cover requirements are

shown on the drawings.

The dome tendon conduits are pre-bent and cut to the total length required for the tendons from one trumplate assembly to the other. The vertical wall tendon conduits are

terminated at the anchor plates in top of the ring girder. Dome concrete was not placed

until after tendon conduits, trumpets, anchor plates, and reinforcing bars were installed.

The anchor plates are located and installed relative to the tendon conduits; and the

necessary pockets were provided in the vertical side of the ring girder. The dome

tendon conduits and reinforcing steel are blocked from the liner and located relative to

the theoretical location and not the liner.

The tendons are stressed after the cylinder wall and dome concrete has been placed and cured. The vertical tendons are stressed first. The stressing operation starts at four

positions along the circumference of the cylinder. The sequence of stressing the vertical

tendons is approximately symmetrical with respec t to the cylindrical wall circumference.

After completion of the vertical tendons, the dome and horizontal wall tendons are

installed and stressed in a sequence so as to minimize stress concentration in the shell.

3. TEST REQUIREMENTS

3.1 PRELIMINARY

SAFETY ANALYSIS REPORT

The Preliminary Safety Analysis Report, Section 5.0 and Appendix 5F, Reactor Building Instrumentation, provided background information on initial commitments to the AEC on

the subject of instrumentation and measurements to be made during the structural proof

test.

4. TEST PROCEDURES

4.1 GENERAL

DESCRIPTION

After completion of the construction of the entire containment vessel, a structural integrity test will be performed where a pneumatic pressure at 63.3 psig (115 percent of

the design pressure of 55 psig) will be maintained for a minimum of one hour. The

pressurization of the vessel will be performed so as to permit readings and

measurements more fully described hereafter to be made during the initial pressurization

at 0 psig, 30 psig, 45 psig, 55 psig, at final test pressure of 63.3 psig, and thereafter TMI-1 UFSAR APPENDIX 5E 5E-4 REV. 20, APRIL 2010 during depressurization at 55 psig, 45 psig, 30 psig, and 0 psig. Except for the maximum pressure level (63.3 psig), the vessel pressure will always be stopped at 0.1

psi above the level at which the measurem ents will be made, and the pressure will then be slowly reduced to the specified value and held for 60 minutes to permit an adjustment

of strains within the structure. Observations will be made and data taken after the 60

minute hold.

Because the structure is so large, displacement measurements can be made with sufficient precision to serve as confirmation of previously calculated response. The test

program further includes, in addition to displacement measurements, a continuous visual examination for concrete cracks of the Reactor Building exterior concrete surfaces, that

can be observed from existing or temporary pl atforms, with special attention given to pertinent locations such as major discontinuities. An ideal schedule has been

determined as an aid in planning a detailed procedure for the Structural Integrity Test. A

description of the instrumentation used to measure response is included in Section 5 of

this report. Predited displacements developed for an internal pressure of 63.3 psig, which is the pressure for the structural proof test, is included in Section 7 of this report.

Strain values obtained, however, will be analyzed to determine magnitude and direction

of principal strains.

Maximum cracks widths are described in Section 7.

4.2 PREPARATION

The installation of all targets, LVDT'S, white wash for crack pattern areas, tapes, strain gages, junction boxes, cables, read-out instruments, support structures, and platforms

must be completed prior to initiating pressurization of the vessel. The location for

instrumentation is shown in Table 1.

The strain gages for reinforcing bars are waterproofed and protected to permit encasement in the concrete. It is recognized that prior to the test, when each strain

gage is being checked out, malfunction of gages may occur. Therefore, in order to avoid

having to remove concrete to regain access to the gage, two gages have been installed

at each specified location. One gage has been installed, wired, waterproofed, and

protected directly to the main reinforcing steel in the shell outer surface.

The other gage "dummy gage," has been wired, waterproofed, and protected to a No. 4, 3 feet long reinforcing bar, and installed adjacent to the first gage.

Prior to the start of the structural integrity test, the inside air temperature will be controlled so that the air temperature reaches a steady-state condition two to three days

before the start of the structural integrity test.

The outside air temperature will vary, but due to the relatively short period of time involved in the structural integrity test, it is expected that the fluctuation of the outside air

temperature will not affect the temperature in the concrete shell.

In order to verify the above, both inside and outside air temperature readings will be taken and recorded at least twice daily for two weeks prior to the start of the structural

integrity test and at each pressure level shown on Figure 2 during the structural integrity

test.

TMI-1 UFSAR APPENDIX 5E 5E-5 REV. 20, APRIL 2010 After completion of the structural integrity test, the temperature data will be reviewed.

4.3 DURING

TEST

All acquired data and general observations will be transmitted to the control center.

Data will be tabulated on the sheets typically shown in Tables 2 through 7 and will be

graphically shown on Figures 12 through 22 to ensure immediate comparison with

predicted results.

TMI-1 UFSAR APPENDIX 5E 5E-6 REV. 20, APRIL 2010

4.4 FOLLOWING

TEST

All acquired data plus interpretations of the results will be incorporated in this report. If the test data include any displacements whic h are in excess of the predicted extremes, such discrepancies will be resolved by means of including a review of the design, evaluation of measurement errors, material variability, and possibly exploration of the

structure.

The test data obtained during the structural integrity test will be interpreted and compared with the analytical values. The analytical values have been obtained using

the same method of analysis as was used for the design of the containment structure. If

the test values do not show good agreement with the analytical values, the

discrepancies will be resolved or the design safety margin will be reviewed.

5. INSTRUMENTATION

The behavior of the containment vessel will be observed during the structural proof test by making strain and displacement measurements. In addition, crack spacing and width

will be observed.

5.1 GENERAL

DESCRIPTION

The type of instruments used are shown on Figures 3, 4, 5, and 6. These are:

Displacement Measurements

a. Jig Transits with scales and targets

b. Levels

c. Invar tapes

d. LVDT (Displacement Transducers)

Strain Measurements

a. Strain gages

b. Rosette strain gages

5.1.1 Displacement

Measurements

Cylinder displacements will be measured at:

Three locations using jig transits and several scales at each location

Three locations using precision levels and rods

Three locations using Invar tapes and precision levels

One location using Invar tape and LVDT (Linear Variable Displacement Transducers)

Forty-one locations using LVDT'S TMI-1 UFSAR APPENDIX 5E 5E-7 REV. 20, APRIL 2010

a. Jig Transits

Three jig transits (one at each of the 3 azimuths) will be permanently set up and sheltered on the roof of auxiliary building, control building, and intermediate

building. Two scales will be attached on the ring girder at each azimuth; the

remaining scales are attached to the cylinder wall: four at one azimuth, three at

another azimuth, and two at the third azimuth. Bare targets will be attached

directly to the concrete roof structure at each of the three azimuths. Relative

radial displacement will be determined at each scale location by aligning the

transit with the base target and by plunging the scope up from the base target to

each scale. Variations in the scale readings from the original reading will

indicate the amount of displacement.

b. Precision Levels

Vertical displacements of the mat at Elevation 279 feet 0 in. outside the Reactor Building will be measured utilizing precision levels. Three levels will be needed, one at each azimuth, and will be located above grade. The levels will not be

placed within 40 feet of the Reactor Building. This location should eliminate

possible minute ground movements during pressurization of the vessel. A

precise surveyors rod (at each azimuth) will be attached to the mat at Elevation

279 feet 0 inches.

c. Invar Tapes

Vertical displacements of the cylinder at the top of the ring girder, for side wall elongation and average tendon strain, will be determined using three Invar tapes (or equal) at three azimuths. The tapes will be mounted at the ledge (top of the

ring girder) and will extend down to grade level, where weights will tension the

tapes. The weights will be dampened in 10 gallon drums of oil. The tapes must

be protected against oscillation due to wind. A scale attached to the tape will be

read, with the same precision levels described under Item b, to indicate relative

elongation.

The fourth Invar tape will be attached to the apex of the reactor building liner and extend down to the operating floor. Weight will tension the tape and will be

dampened in a 10 gallons drum of water. An LVDT will be attached to the tape

and vertical dome displacements read at the control center.

d. LVDT

Radial displacements will be measured with the LVDT'S at three azimuths (12 LVDT'S total) at the base of the cylinder wall.

LVDT'S will be utilized at 28 locations attached to the concrete surface around the equipment access opening to measure horizontal and vertical displacements.

Along the horizontal axis, eight horizontal and eight vertical displacements will

be obtained to a point forty four feet from the centerline of the hole. Along the

vertical axis, six horizontal and six vertical displacements will be obtained to a TMI-1 UFSAR APPENDIX 5E 5E-8 REV. 20, APRIL 2010 point thirty one feet and six inches above the centerline of the equipment access opening.

Rigid support structures for the 40 LVDT'S will be built, properly braced and protected due to changes in weather.

e. Instrument Accuracy

Displacement measurement accuracies will be as follows: The jig transit with an optical micrometer will have a resolution of 0.001 inch and an accuracy of 0.005

to 0.010 inch. The LVDT'S and associated instrumentation will have a resolution

of better than 0.001 inch and an accuracy of 0.002 to 0.005 inch.

5.1.2 Strain

Measurements

a. Reinforcing Bar Strain Gages A total of 74 reinforcing bars will be instrumented for strain measurement; 28 at locations similar to LVDT displace ment measurements around the equipment access opening, and 46 at locations above and below the ledge.

b. Liner Rosette Strain Gages

The liner will be instrumented with rectangular rosettes at six locations to indicate general strain in regions unaffected by geometric discontinuities and at 42

locations around three typical penetrations. Fourteen rosettes will be used at

each penetration.

c. Strain Gage Accuracy

The strain gages on reinforcing bars and associated instrumentation will have a resolution of 0.4 microinch per inch strain and an accuracy of two to three

microinches per inch. The strain gages on the steel liner will have a resolution of

one microinch per inch and an accuracy of approximately five microinches.

5.1.3 Concrete

Crack Measurement

The accessible portions of the Reactor Building will be visually inspected for cracks and crack patterns from both the ground and the available scaffolding at the time of the test.

Any observed cracks greater than 0.005 inch width shall be charted.

Approximately 1450 square feet of the outside surface of the containment vessel will be whitewashed for detailed measurement of spacing and width of cracks to confirm the

magnitude of the local strains are not excessive. The whitewash areas are as follows:

an area of approximately six foot width of the structure at the dome-to-cylinder transition extending six feet above and below the ledge and including ring girder area; three areas

of approximately 6 feet width of the ring girder extending from elevation 439 feet 0

inches to elevation 451 feet 0 inches; and an area six feet by six feet on the cylinder at

elevation 360 feet 0 inches; and an area six feet by ten feet at the base of cylinder wall.

In addition, an area approximately 28 feet by 32 feet at one upper quadrant of the

equipment access opening will be whitewashed.

TMI-1 UFSAR APPENDIX 5E 5E-9 REV. 20, APRIL 2010 A one foot by one foot grid system will be laid out over the entire whitewashed area.

Platforms will be provided for access and protective covers will be provided against

adverse weather. All cracks shall be plotted for each pressure level when pressurizing, and at 0 psig after completion of the pressure test; but only those cracks width

measurements greater then 0.005 inch shall be recorded on the plots. Optical

instruments shall be used for measurement of crack widths.

5.1.4 Tendon

Anchorage Zone Inspection

The results of the structural integrity test for the Robert E. Ginna Nuclear Power Station, which are presented in "Structural Integrity Test of Reactor Containment Structure" prepared for Westinghouse Electric Corporation, Atomic Power Division, and for

Rochester Gas and Electric Corporation by Gilbert Associates, Inc. (GAI Report No.

1720 includes strains obtained from load cells installed under the tendon button heads

and strain gages installed on the tendon bearing plates for four vertical tendons.

Although the results obtained from both the load cells and strain gages were in general

agreement with the predicted behavior, the results did not appreciably aid in the

evaluation of the behavior of the containment structure. This was due to the fact that the

strains which were recorded were due only to the increase in tendon force resulting from

the pressure loading. This increase amounts to only a small percentage of the total

force in the tendon.

The tendons installed in the containment structure of the Three Mile Island Nuclear Station Unit 1 will behave in a manner similar to the tendons installed in the containment

structure of the Robert E. Ginna Nuclear Power Station. Specifically, the increase in

tendon force due to the pressure loading amounts to only about five percent of the

original tendon force for the hoop and dome tendons and 2 1/2 percent for the vertical

tendons. Because of the above and, also because of the testing of the post- tensioning

system as described in Appendix 5B, tendon load cells and bearing plate strain gages

will not be installed on the containment structure.

The tendon anchorage zone inspection will include the following:

a. A visual inspection of the concrete in the area of accessible anchorage zones both prior to the start of the structural integrity test and at each pressure level

shown on Figure 2 during the structural integrity test.

b. One tendon anchorage zone for vertical tendons V-81 and V-82 and dome tendons 327, 328, and 329 are included in white-wash area No. 120, "Wall and

Dome Junction," shown on Figure 8. These anchorage zones will be examined

at each pressure level when pressurizing and at 0 psig after completion of the

pressure test.

Any unusual observations will be recorded on Table 7, "Tendon Anchorage Observations" and evaluated.

TMI-1 UFSAR APPENDIX 5E 5E-10 REV. 20, APRIL 2010 6 AS BUILT CONDITIONS

A survey of the "as built" conditions of the reactor building shell will be performed after completion of the construction. Radial distances from the established centerpoint of the

containment vessel to the inside face of the liner plate will be measured at various

elevations and azimuths prior to the test. The centerpoint was established prior to the

erection of the liner plate and shell concrete.

7 CALCULATED RESPONSE

7.1 GENERAL

DESCRIPTION

Displacements of the reactor building under pressure have been computed at several points on the vessel. A graph for each of these points (a total of 62) shows the limiting

displacement at a pressure equal to 63.3 psig. The displacements at this pressure level

include a 20 percent increase to allow for potential errors in measurements. Pressure

versus displacements will be plotted at p = 0, 30, 45, 55, and 63.3 psig during

pressurization; and at p = 55, 45, 30, and 0 psig during depressurization. The curves so

plotted during the test are limited by:

a. The horizontal line at p = 63.3 psig

b. The vertical line labeled "limiting displacement"

A typical predicted radial displacement curve of the Reactor Building is shown on Figure

7.

Stress cracking from the applied pressure loading is not anticipated due to the residual compressive stress remaining in the shell at the pressure peak of 63.3 psig. But existing

shrinkage cracks would enlarge slightly in width and also propagate in length during pressurization of the Reactor Building. Also, some new hairline cracks may occur that

were not initially observed. The crack pattern will be random and the crack width

enlargement should be less than 0.010 inch. Figures 8, 9, 10, and 11 show the

configurations and locations of the crack pattern areas and are noted as to the cracking

which might occur. Copies of these same figures will be used to record any cracking

that does occur.

Local larger crack widths could appear, and will then be evaluated with related parameters as to its effect on the overall structural integrity.

7.2 CALCULATED

DISPLACEMENTS

The calculated displacements for each radial and vertical measurement point (the scales, LVDT'S, and tapes) are shown on Figures 12 through 22: also, the measured

values will be plotted on their respective graph. The graphs or instrument locations are

enumerated as follows:

a. Cylinder base radial displacements, LVDT gage location 1-6, are shown on Figure 12.

TMI-1 UFSAR APPENDIX 5E 5E-11 REV. 20, APRIL 2010

b. Cylinder base and wall radial displacements, LVDT gage locations 7-12, are shown on Figure 13.

c. Cylinder wall and dome radial displacements, scale locations 13-24, are shown on Figures 14 and 15.

d. Dome radial displacements and cylinder ledge (top of ring girder) vertical displacements, scale locations 25-27, and tape locations 28-30 are shown on

Figure 16.

e. Cylinder base and dome apex vertical displacements, rod locations 31-33, and LVDT gage location 34 are shown on Figure 17.

f. Equipment access, radial and vertical displacements, LVDT gage locations 35-48. See Figures 18, 19, 20, 21, and 22.

7.3 MEASUREMENT, ANALYSIS, AND CONSTRUCTION INACCURACIES

Accepted standards for comparison of displacement measurements with predicted displacements are based upon increasing predicted displacements for the 63.3 psig

pressure by 20 percent. This reflects all variables, including precision of measurements, design variables such as accuracy of design loads and analysis techniques, and

construction variables such as variation of dimensions.

8. FORMS FOR RECORDING THE MEASURED DISPLACEMENTS, STRAINS, TEMPERATURE, AND TENDON ANCHORAGE OBSERVATIONS

The forms for recording the measured displacements, strains, temperatures, and tendon anchorage observations during the test are shown on:

Table 2 - Strain Gages Full Bridge Table 3 - Strain Gages Rosettes Table 4 - Displacement LVDT'S Table 5 - Displacement Scales and Tapes Table 6 - Temperature Readings Table 7 - Tendon Anchorage Observations - Wire Failures

9 INTERPRETATION OF RESULTS

The displacements, strains and observations data and crack pattern charts will be included in a report along with the interpretation and conclusions of the Structural

Integrity Test. This report will be filed with the AEC.

TMI-1 UFSAR APPENDIX 5E 5E-12 REV. 20, APRIL 2010 TABLE 5E-1 (Sh. 1 of 4)

INSTRUMENT LOCATION

The location of displacement measurements are as follows:

1-1 Cylinder Base Radial Displacement -- LVDT

LVDT Gage Loc. Elevation Azimuth Notes

1,2,3 284'-0" 108º, 243º, 352º Radial Displacement 4,5,6 294'-0" 108º, 243º, 352º Radial Displacement 7,8,9 326'-0" 108º, 243º, 348º Radial Displacement 10,11 358'-0" 108º, 348º Radial Displacement 12 390'-0" 108º Radial Displacement

1-2 Cylinder Wall and Dome Radial Displacement - Jig Transit and Scales

Scale Loc. Elevation Azimuth Notes

13 358'-0" 245º Radial Displacement 14,15 390'-0" 245º, 352º Radial Displacement 16,17,18 422'-0" 108º, 245º, 352º Radial Displacement 19,20,21 432'-0" 108º, 245º, 352º Radial Displacement 22,23,24 439'-2" 108º, 245º, 352º Radial Displacement 25,26,27 453'-6" 108º, 245º, 352º Radial Displacement

1-3 Cylinder Ledge and Base Vertical Displacement - Invar Tape, Rod and Level

Tape & Rod Loc. Elevation Azimuth Notes

28,29,30 453'-6" 132º, 247º, 11º Wall-Vertical Displacement 31,32,33, 279'-0" 131º, 248º, 9º Base-Vertical Displacement 34 468'-4-1/8" Dome Apex See Dome Vertical Displ.

1-4 Dome Apex Vertical Displacement - Invar Tape and LVDT

Tape Location Elevation Location Notes

34 468'-4-1/8" Dome Apex

TMI-1 UFSAR APPENDIX 5E 5E-13 REV. 20, APRIL 2010 Table 5E-1 (Sh. 2 of 4)

1-5 Equipment Access Opening Displacement - LVDT

LVDT Gage Loc. Elevation Notes

35,37,38,39,40,41,42 319'-2" Radial Displacement 35,37,38,39,40,41,42 319'-2" Vertical Displacement 36 307'-2" Radial Displacement 36 307'-2" Vertical Displacement 43 331'-2" Radial Displacement 43 331'-2" Vertical Displacement 44 354'-7-3/4" Radial Displacement 44 354'-7-3/4" Vertical Displacement 45 338'-8" Radial Displacement 45 338'-8" Vertical Displacement 46 342'-8" Radial Displacement 46 342'-8" Vertical Displacement 47 346'-8" Radial Displacement 47 346'-8" Vertical Displacement 48 350'-8" Radial Displacement 48 350'-8" Vertical Displacement

The location of strain measurements are as follows:

1-6 Equipment Access Opening - Reinforcing Bar Strain

Strain Gage Loc. Elevation Notes

35,37,38,39,40,41,42 319'-1" Hoop Strain 35,37,38,39,40,41,42 319'-2" Meridional Strain 36 307'-2" Hoop Strain 36 307'-2" Meridional Strain 43 331'-2" Hoop Strain 43 331'-2" Meridional Strain 44 334'-5" Hoop Strain 44 334'-5" Meridional Strain

TMI-1 UFSAR APPENDIX 5E 5E-14 REV. 20, APRIL 2010 Table 5E-1 (Sheet 3 of 4)

Strain Gage Loc. Elevation Notes

45 338'-8" Hoop Strain 45 338'-8" Meridional Strain 46 342'-8" Hoop Strain 46 342'-8" Meridional Strain 47 346'-8" Hoop Strain 47 346'-8" Meridional Strain 48 350'-8" Hoop Strain 48 350'-8" Meridional Strain

1-7 Cylinder Wall and Dome Junction - Reinforcing Bar Strain

Strain Gage Loc. Elevation Azimuth Notes

49,50,51 430'-0" 108º, 245º, 352º Wall-Meridional Strain 49,50,51 430'-0" 108º, 245º, 352º Wall-Hoop Strain 52,53,54 435'-0" 108º, 245º, 352º Wall-Meridional Strain 52,53,54 435'-0" 108º, 245º, 352º Wall-Hoop Strain 55,56,57 440'-0" 108º, 245º, 352º Ring Girder-Mer. Strain 55,56,57 440'-0" 108º, 245º, 352º Ring Girder-Hoop Strain 58,59,60 446'-0" 108º, 245º, 352º Ring Girder-Mer. Strain 58,59,60 446'-0" 108º, 245º, 352º Ring Girder-Hoop Strain 61,62,63 452'-0" 108º, 245º, 352º Ring Girder-Mer. Strain 61,62,63 452'-0" 108º, 245º, 352º Ring Girder-Hoop Strain 64,65,66 454'-0" 108º, 245º, 352º Dome-Meridional Strain 64,65,66 454'-0" 108º, 245º, 352º Dome-Hoop Strain 67,68,69 458'-0" 108º, 245º, 352º Dome-Meridional Strain 67,68,69 458'-0" 108º, 245º, 352º Dome-Hoop Strain 129,130 446'-0" 80º, 320º Ring Girder-Hoop Strain 129,130 446'-0" 80º, 320 Ring Girder-Mer. Strain

TMI-1 UFSAR APPENDIX 5E 5E-15 REV. 20, APRIL 2010 Table 5E-1 (Sh. 4 of 4) 1-8 Liner Strain-Rosettes

Rosette Strain Gage Loc. Elevation Azimuth Notes

70,71,72 358'-0" 108º, 245º, 352º Liner Strain 73,74,75 390'-0" 108º, 245º, 352º Liner Strain

1-9 Liner Strain at Penetrations - Rosettes

Rosette Strain Gage Loc. Elevation Azimuth Notes

76,77,78,79,80,81,82 337'-0" 7º 47' 30" Main Steam Penetration

83,84,85,86,87,88,89 337'-8" 7º 47' 30" Main Steam Penetration

90,91,92,93,94,95,96 316'-1-11/16" 7º 47' 30" Feedwater Penetration

97,98,99,100,101,102,103 316'-1-11/16" 7º 47' 30" Feedwater Penetration

104,105,106,107,108, 317-6" 331º 39' 50" R.B. Leak Test Press.

109,110 Sensing

111,112,113,114,115, 317'-6" 331º 39' 50" R.B. Leak Test Pressure 116,117, Sensing

White Wash of Reactor Building:

1-10 White Wash - Crack Pattern and Spacing

Area No. Elevation Azimuth

118 284'-0" 175º 119 360'-0" 175º 120 453'-6" 175º 121 319'-2" Equipment Access Opening 131 445'-0" 22º 132 445'-0" 320º 133 445'-0" 350º

Temperature Check Points:

1-11 Ambient Temperature

Thermometer Loc. Elevation Azimuth

122,123 456'-0" 245º, 352º 124,125 380'-0" 245º, 352º 126,127 380'-0" 245º, 352º 128 Average Temperature inside the Containment Vessel

TMI-1 UFSAR APPENDIX 5E 5E-16 REV. 18, APRIL 2006

TMI-1 UFSAR APPENDIX 5E 5E-17 REV. 18, APRIL 2006

TMI-1 UFSAR APPENDIX 5E 5E-18 REV. 18, APRIL 2006

TMI-1 UFSAR APPENDIX 5E 5E-19 REV. 18, APRIL 2006

TMI-1 UFSAR APPENDIX 5E 5E-20 REV. 18, APRIL 2006

TMI-1 UFSAR APPENDIX 5E 5E-21 REV. 18, APRIL 2006