ML20151E469

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Civil/Structural Tests Re Hilti Expansion Anchors Installed in Coredrilled Holes & Richmond Inserts W/Partial Bolt Engagements
ML20151E469
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 07/13/1988
From:
STONE & WEBSTER ENGINEERING CORP.
To:
Shared Package
ML20151E452 List:
References
NUDOCS 8807260081
Download: ML20151E469 (16)
v • d • e


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PRESENTATION TO US NUCLEAR REGULATORY COMMISSION JULY 13, 1988 COMANCHE PEAK STEAM ELECTRIC STATION UNTT 1 AND COMMON

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CIVIL / STRUCTURAL TESTS CONCERNING HILTI EXPANSION ANCHORS INSTALLED IN COREDRILLED HOLES AND RICHMOND INSERTS WITH PARTIAL BOLT ENGAGEMENTS

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STONE & WEBSTER ENGINEERING CORPORATION 8807260081 880715

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13306-18051-B2 1

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Tests of Hilti Kwik-Bolts in Coredrilled Holes Issue (Cygna RIL No. 7)

Coredrilled holes may be slightly larger in diameter than holes drilled with Hilti masonry carbide bits, resulting in a potential reduction in pullout capacity.

Resolution A testing program has been completed by SWEC to - validate the pullout capacity of Hilti anchors installed in coredrilled holes.

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Tests of Hilti Kwik-Bolts in Coredrilled Holes '(Cont.)

Test Program Test slab poured using CPSES 4,000 psi concrete as specified in Specification 2323-CS-9, Revision 6.

Hilti expansion anchors were installed in test slab per Specification 2323-SS-30, Revision 3.

Tension tests were performed per ASTM E-488.

Specimens 3/4 in. Hilti Kwik Bolts 1 in. Hilti Kwik Bolts 1 in. Hilti Super Kwik Bolts 1 1/4 in. Hilti Kwik Bolts Test results were adjusted downward to account for actual c,oncrete compressive strength of 5230 psi.

Test report is No.

18051.01-CS(B)-17-09, "Report on Tes,ts of Hilti Kwik-Bolts in Coredrilled Holes".

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13306-18051-B2 3

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TABLE 5 i

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SUMMARY

OF TEST RESULTS FOR HILTI KWIK-BOLTS 1

i IN COREDRILLED HOLES ANCHOR EMBEDMENT ANCHOR DRILL DESIGN @

TEST'@

TEST CAPACITY AS 7.

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SIZE (in)

DEPTH (in)

TYPE TYPE CAPACITY CAPACITY Of DESIGN CAPACITY REMARKS 3/4" 9"

H M

5.875 3.131 53 NOTABLE I

3/4" 9"

H D-5.875 2.160 37 REDUCilON 3/4" 8"

H M

5.750 3.875 67 NOTABLE 3/4" 8"

H D

5.750 2.967 52 REDUCliON

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3/4" 7"

H M

5.250 5.681 108 COMPARABLE. APPROACH 3/4" 7"

H D

5.250 5.052 96 DESIGN CAPACITY i

1" 10" H

M 5.860 7.920 135 EXCEEDS DESIGN

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'D 5.860 6.211 106 CAPACITY i

1" 10" H

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10-1/2" SH M

12.439 11.396 92 COMPARABLE 1"

10-1/2"

'SH D

12.439 11.474 92 1-1/4" 10-1/2" H

M 10.225 10.102 99 COMPARABLE 1-1/4" 10-1/2" H

D 10.225 9.861 96 Notes j

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M = Mosonary bit (Monufactured by Hitti) control condition

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D = Diamond coredrill extraction bit (monuf actured by Drillco) test condition o

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H = Hitti Kwik-Bolt l'!

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SH = Hill: Super Kwik-Bolt 418 5

Design capacities are from DBD-CS-015 ond include o factor of safety of 4.

6 The test copocities are the adjusted ovesoge ultirnate f rom lot >les I through 4 reduced by

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o f actor of safety of 4.

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a l-Tests of Hilti Kwik Bolts in Coredrilled Holes f. Cont.)

3/4 in. Anchors with 8 in, and 9 in. Embedments Notable reduction DBD-CS-015 will be revised Existing installations will be addressed Reported to NRC - Letter No. TXX-88533 e

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4 Tests of Richmond Inserts with Partial Bolt Engagements Issue In certain instances, bolts were determined to be installed in Richmond inserts with short thread engagements.

Resolution A testing program was performed to determine the capacities of Richmond inserts with a range of bolt engagements and load combinations. The results of the tests were incorporated into the Design Basis Document DBD-CS-015.

Installations that utilized Richmond inserts have been design validated based on the design criteria specified in the Design Basis Document.

Test Program Tests were performed on unused, in-plant, 1-in. and 1 1/2-in. Richmond inserts.

Shear, tension, and shear / tension interaction tests were performed for.

a range of bolt engagements.

Tests were performed in accordance with ASTM E-488, as applicable.

13306-18051-B2 5

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e Tests of Richmond Inserts with Partial Bolt Engagements (Cont.)

Two test serie:

General population of Richmond inserts tested.

1-in. inserts tested using "turn-of-the-nut installation method to simulate early HVAC installations.

Test Reports 16345/6-CS(B)-17-05, "Report on Tests of Richmond Inserts with l

Partial Bolt / Rod Thread Engagement".

16345/6-CS(B)-17-06, "Report on Preliminary Tests of Richmond Inserts with Pretensioned High Strength Bolts and Partial Bolt Engagement".

16345/6-CS(B)-17-07, "Report on Final Qualification Tests of Richmond Inserts with Pretensioned High Strength Bolts and Partial Bolt Engagement".

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16345 / 6-CS ( Et ) 05 APPEND!X A Page A-25

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FIGL'RE 1 16345/6-CS(3)-17-05 TENSION LOAD VS. PERCENT ENGAGE:ENT 1 INCH, TYPE EC-2W RICHMOND INSERT, SA-36 40,000,

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FIGL'RE 2 16345/6 CS(3).17-D5 TENSION LOAD VS. PERCENT ENGAGE!2NT Ib INCH, TYPE EC-6W RICHMOND INSERT,SA-36 100,000 9

LEGEND FINAL TE,ST LO_AD 1.

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FIGURE 3 16345/6-CS(B)-17-05 SHEAR VS. TENSION INTERACTION CURVE

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1 INCH, TYPE EC-2W RICHMOND INSERT, SA-193, 3/4" ENCAGE 1ENT 40,000 I

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36,000 T4 10208 LBS. TD4SICN TEST ADJLSTED j ULI'INATE IDAD - TABLE 5 Sa : 33,584 GS. SHEAR TEST ADJUSTED L*LITMATE IDAD (AVERAGE)-TABLE 3 32,000 i

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'ABLE 4 Sumanry of Results 1-inch Diameter Type EC-2W Richmond Insert i

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a Tests of Richmond Inserts with Partial Bolt Engagements (Cont.)

For 1-in.

bolts pretensioned by the turn-of-the-nut method full design loads can be applied when engagement is 1 5/16 in. (62%) or greater.

For this population, design allowable loads are:

Normal load - 4000 lb (FS=3)

Ext. rems-load - 6000 lb (FS=2)

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July 15, 1988 a-Sumary of July 13, 1988 Audit 1-5/16-inch, the capacity of the insert was reduced and the turn-of-the-nut method of pretensioning bolts resulted in damage to the insert.

A total of 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> was involved in this audit.

(originalsignedby)

David Terao, Project Manager Comanche Peak Project Division Office of Special Projects

Enclosures:

1.

List of Audit Participants 2.

Presentation to NRC Staff cc: See next page

,,, DISTRIBUTION,,,,?

k, Docket F11e-NRC PDR local PDR CPPD Reading OSP Reading JPartlow CGrimes PMcKee JHWilson JLyons RWarnick Hialloy D1 trao CPPD-LA OGC-WF FMiraglia EJordan BGrimes ACRS(10)

LShao GBagchi JMa BLiaw JFair CPPD:0SP AD:CPPD:0SP DTerao:cm JHWil o 07//f/88 07/is /

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