ML20151W383

Summary of 880406 Audit at S&W Ofcs in Boston,Ma Re Util Corrective Action Program for Civil/Structural Design for Concrete Anchorages & Resolution of Anchorages Issues. Viewgraphs Encl

ML20151W383
Person / Time
Site:	Comanche Peak
Issue date:	04/27/1988
From:	Terao D NRC OFFICE OF SPECIAL PROJECTS
To:	NRC OFFICE OF SPECIAL PROJECTS
References
NUDOCS 8805030385
Download: ML20151W383 (12)

Text

_

e

+ o, UNITED STATES

{ g ,

NUCLdAR REGULATORY COMMISSION l ,

WASHINGTON, D. C. 20555

\...*/

April 27, 1988 Docket Nos. 50-445 and 50-446 APPLICANT: Texas Utilities Electric Company (TV Electric)

FACILITY: Comanche Peak Steam Electric Station (CPSES), Units 1 and 2

SUMMARY

OF AUDIT "0?rAPRIL 6, 1988 - CONCRETE ANCHORAGE DESIGN CRITERIA On April 6,1988, the NRC staff and its consultants conducted an audit of the TU Electric Corrective Action Program (CAP) for civil / structural design at the offices of Stons & Webster Engineering Corporation (SWEC) in Boston, Massach m t*s. The purposes of the audit were to clarify specific design issues related to concrete anchorages and to review the associated design criteria used by SWEC in the resolution of the concrete anchorage issues. A list of participants in the audit is provided in Enclosure 1 to this sumary.

Issue Development The issues and issue resolution related to concrete anchorage design that were audited by the staff are documented in the civil / structural project status report in Subappendices A14, A15 A20, and A24 through A35. The SWEC represen-tatives presented an overview sumary of the issue development including the sources of the issues, the issue resolution, and the resolution documentation.

The concrete anchorage issues were raised primarily as a result of the Indepen-dent Assessn.ent Program conducted by CYGNA Energy Services and the CPRT Progran, Plan's Design Adequacy Program (DAP) and Issue-Specific Action Plans (ISAPs). '

The overview slides presented to the staff are provided in Enclosure 2 to this summary.

SSER-14 Itenis Related to Civil / Structural CAP The staff discussed the SWEC resolution of three specific issues related to Richmond inserts which were identified in Supplement 14 to hUREG-0797 (SSER-14),

Appendix A. Sections 1.2, 1.6, and 1.11. These three issues as noted in SSER-14 were transferred to the Civil / Structural CAP and pertained to 1) concrete com-pression inserts, strength, 2) testing of Richmond inserts, and 3) spacing at Richmond

1) Concrete Compression Strength - The SWEC validation of the 4000 psi concrete compression strength at CPSES was performed through a review of ISAP II.b, "Concrete Compression Strength " Revision 3. The SWEC review was documented in a Design Validation Related Document Review Fonn, DVRD Review No. DVP-1-090-R-1636. "Concrete Compression Strength." SWEC found the ISAP II,b test program consistent with the requirements of DVP-09U and verifies that the specified design strength of concrete was met during the construction process.

8805030385 08c427 PDR ADOCK 05600445 q PDR

Suninary of Audit on April 6,1988 2) Testing of Richmond Inserts - In developing the allowables for Richmond I inserts at CPSES, test programs were conducted for both full engagement  ;

and partial engagement of the Richmond insert bolt / threaded rod. The full engagement tests were previously conducted by TUGC0 in 1983 and are dis-cussed in SSER-14, Appendix A (Section 1.3). The partial engagement test results are documented in SWJC Test Repert 16345/6-CS(B)-17-05,"Report on Tests of Richmond Inserts With Partial Bolt / Rod Thread Engagement,"

July 1987. The staff is continuing its review of the partial engagement test results.

3) Spacing at Richmond inserts - SWEC developed guidelines to address the

, spacing of anchorages adjacent to Richmond inserts. The guidelines are documented in CPSES Specification 2323-SS-30, "Structural Embedments" in Table 7-1 and CPSES Design Basis Document DBD-CS-015. "The Qualification of Embedments in Concrete," in Table 1 and in Section 6.5.2. The staff is continuing its review of the bases for the SWEC guidelines.

CYGNA Review Issue List Items The CYGNA Review Issue List items related to concrete anchorages are still W en at this time.

Other Items _

1) Hilti Kwik-Bolt Shear Tests (Edge Distance) - Recent tests by Hilti to determine the edge distance allowables for Hilti Kwik-Bolts have shown that the current criteria of 50 (where D is the bolt diameter) may not be adequate for shear loads. Hilti has submitted a report per 10 CFR Part 21 .

to the NRC staff in a letter from C. J. Poparad (Hilti) to R. D. Martin (USNRC) dated March 18, 1988. For CPSES, the applicant is utilizing the Hilti test data to develop CPSES-specific design guidelinci,. In addit 10n, the applicant is conducting its own confinnatory tests te verify its guidelines. The staff is continuing its review of the CPSES design guide-lines for Hilti Kwik Bolts and similar concrete anchorages.

2) The staff reviewed the SWEC criteria for determining anchor bolt embedment depth and minimum spacing between embedments. Specific questions addressed by SWEC clarified the criteria application. The staff is continuing its review of the stiffness values used for concrete anchorage including baseplate flexibility and prying action factors.

3) Exponents Used in Shear-Tension Interaction Equation - Several types of concrete anchorages are used at CPSES and include grouted bolts, Richmond  ;

inserts, thru-bolts, Hilti concrete expansion anchors, embedded bolts,  :

and embedded plates. The staff discussed the various types of concrete  ;

anchorages used at CPSES and the exponent used in the shear-tension  ;

interaction equation for each type including the basis for the exponent.  ;

The discussion is summarized in the table below.  ;

i I

i

i 1

. I Summary of Audit on April 6, 1988 Anchorage Type Exponent Used Basis j grouted bolt 1 analytically canservative Richmond inserts 4/3 vendor recommended thru-bolt 1(concreta) analytically conservative 2 (steel) AISC Manual Hilti Kwik-Bolt 5/3 test data-embedded bolt 1 analytically conservative embedded plate (Nelson stud) 5/3 vendor recommended No open or unresolved items were identified as a result of this audit.

David Terao, Mechanical Engineer Comanche Peak Project Division Offi;e of Special Projects

Enclosures:

1. List of Participants

2. Overview Slides cc: See next page 4

F p

h

b W. G. Counsil . Comanche Peak Steam Electric Station Texas Utilities Electric Company Units 1 and 2 cc:

Jack R. Newman, Esq. Asst. Director for Inspec. Programs Newman & Holtzinger, P.C. Cemanche Peak Project Division Srite 1000 U.S. Nuclear Regulatory Comission 1615 L Street, N.W. P. O. Box 1029 Washington, D.C. 20036 Granbury, Texas 76048 4 Robert A. Wooldridge, Esq. Regional Administrator, Region IV Worsham, Forsythe, Sampels & U.S. Nuclear Pegulatory Comission Wooldridge "

611 Ryan Plaza Drive, Suite 1000 2001 Bryan Tower, Suite 2500 Arlir;gton, Texas 76011 Dallas, Texas 75201 Lanny A. Sinkin Mr. Homer C. Schmidt Christic Institute Director of Nuclear Services 1324 North Capitol Street Texas Utilities Electric Company Washington, D.C. 20002 Skyway Tower 400 North Olive Street, L.B. 81 Ms. Billie Pirner Garde Esq.

Dallas, Texas 75201 Government Accountability Project Midwest Office Mr. Robert E. Ballard, Jr. 104 East Wisconsin Avenue Director of Projects Appleton, Wisconsin 54911 Gibbs and Hill, Inc.

11 Penn Plaza New York, New York 10001 David R. Pigott, Esq.

Orrick, Herrington & Sutcliffe 600 Montgomery Street Mr. R. S. Howard San Francisco, California 94111 Westinghouse Electric Corporation P. O. Box 355 Anthony Z. Roisman, Esq.

Pittsburgh, Pennsylvania 15230 Suite 600 1401 New York Avenue, NW Susan M. Theisen Washington, D.C. 20005 Assistant Attorney Gener'al

, Environmental Protection Division Robert Jablon P. O. Box 12548 Capitol Station Bonnie S. Blair Austin, Texas 78711-1548 Spiegel & McDiamid 1350 New York Avenue, NW Mrs. Juanita Ellis, President Washington, D.C. 20005-4798 Citizens Association for Sound Energy 1426 South Polk George A. Parker, Chairman Dallas, Texas 75224 Public Utility Comittee Senior Citizens Alliance Of Ms. Nancy H. Williams Tarrant County, Inc.

CYGNA Energy Services 6048 Wonder Drive 2121 N. California Blvd., Suite 390 Fort Worth, Texas 76133 Walnut Creek, CA 94596

W. G. Counsil Comanche Peak Electric Station Texas Utilities. Electric Company Units 1 and 2 cc:

Joseph F. Fulbright Fulbright & Jaworski 1301 McKinney Street Houston, Texas 77010

. Roger D. Walker Manager, Nuclear Licensing Texas Utilities Electric Company Skyway Tower ,

400 North Olive Street, L.B. 81 Dallas, Texas 75201 Mr. Jack Redding c/o Bethesda Licensing Texas Utilities Electric Company 3 Metro Center, Suite 610 Bethesda, Maryland 20814 William A. Burchette, Esq.

Counsel for Tex-La Electric Cooperative of Texas Heron, Burchette, Ruckert & Rothwell Suite 700 1025 Thomas Jefferso.1 Street, NW Washington, D.C. 20007 GDS ASSOCIATES, INC.

Suite 720 1850 Parkway Place Marietta, Georgia 30067-8237 Administrative Judge Peter Bloch ,

U.S. Nuclear Regulatory Commission  !

Washington, D.C. 20555 i Elizabeth B. Johnson Administrative Judge Oak Ridge National Laboratory )

1 P. O. Box X, Building 3500 Oak Ridge, Tennessee 37830 Dr. Kenneth A. M:Collom 1107 West Knapp l Stillwater. Oklahoma 74075 l

Dr. Walter H. Jordan  !

881 West Outer Drive l Oak Ridge, TN 37830 j l

I

s e

1 Enclosure 1 l

~

List of Participants In the Concrete Anchorage Audit April 6, 1988 (5 tone & Webster - Boston, Massachusetts)

Name Title Company IFe3A.Ali Lead EEgTEeer Stone & Webster Eng. Corp.

Timothy J. Lynch Ar.chor Specialist Stone & Webster Eng. Corp.

B. S. Dacko Licensing Engineer TV Electric C. R. Hooton C/S Unit Manager TV Eletric Rudolf R. Boentgen Principal Engineer TES/NRC J. S. Carty Project Engineer Stone & Webster Eng. Corp.

R. D. Ciatto A.st. Lead Eng. Stone & Webster Eng. Corp.

Stone & Webster Eng. Corp.

AYC Wong Lead David Terao Mechanical Engineer NRC A

l l

t-i 1 rm, ---e r--- -r'- - - - - - - - ' - e- ----- *ev--- *----<'---+r- < ~ - - - - - =-

Enclusw. a PRESENTATION TO US NUCLEAR REGULATORY COMMISSION APRIL 6,1988 COMANCHE PEAK STEAM ELECTRIC STATION l UNIT 1 AND COMMON  !

1 l

1 PROJECT STATUS REPORT ,

CIVIL / STRUCTURAL i SUBAPPENDICES ALL, A14, Alb, A20, A24, A25, A28 - A35 CONCRETE EMBEDMENTS 1

i STONE & WEBSTER ENGINEERING CORPOPATION m:acmt

ISSUE DEVELOPMENT AND RESOLUTION I l

• ' C

[- CPRT Cfgp"^ g q l

y PSAS DESIGN CTH ADEQUACY CONDUlT PROGRAM (DAP) DISCIPLINE EXTERNAL SPECIFIC SOURCE

,, ISSUES ISSUES DSAP Vill l C/S

' ISAPs C/S REVIEW v ISSUES 4

DIRs i

lI 1RRs I -

l r

! [_ _

RESOLUTION l

, BY PROJECT s .

SOURCES OF ISSUES AND RESOLUBON ORIGINAL SQURCE SOURCE _ RESOLUTION BASIS SUB E ISSUE A11 Anchor Design Method & Criterio IRR-Sil ---

DBD-CS-015 + CALCS A14 Embed. Design Criterlo & Documentation IRR-514 ---

DBD-CS-015

• CALCS, TEST A15 Test Programs for Embedment Anchors IRR-515 ---

TEST VAUD. INDUSTRY.INF.

INSTALL. SPEC e A2C Alleged Folsificotton of Concrete Str. Rec. ISAP-ll.b ---

SATISFACTORY TEST VAUD.

TEST RESULTS A24 Shortening of SGUL Anchor Bolts ISAP-V.b ---

REWORK + CALCS A25 Hitti Anchor Installation ISAP \11.b.4 ---

INSTALL SPEC + CALCS, TEST A26 Richmond Insert Allowables RIL 1 PSAS 3 DBD-CS-015 + CALCS, TEST.

TEST VAUD.

A27 Embedment Spacing RiL 2 PSAS 9 DBD-CS-015 e CALCS

> INSTAtl SPEC O A28 Through Bolts - Fino! Load Verification RiL 3 PSAS 10 LOAD VERIF.

• PROCEDURES PROGRAM A29 Embedment Plate Design RIL 4 PSAS 26 DBD-CS-015

• CALCS A30 Embedment Distance to Sleeve RIL 5 PSAS 31 DBD-CS-015

• CALCS A31 Exp. Anchor Adjacement to Through Bolts RIL 6 PSAS 34 DBD-CS-015

• CALCS A32 , Exp. Anchor in Cored Holes RIL 7 CTH 35 SATISFACTORY ** TEST TEST RESULTS A33 Exp. Anchor Edge Distance Rll 8 PSAS 42 DBD-CS-015

• CALCS INS 1ALL SPEC e A34 Cot.1 Support / Fire Wall Interaction RIL 9 CTH 22 ISSUE NOT VAUD FIELD OBS.

,- A35 Proximity Violations RIL ID CTH 20K INSTALL SPEC O CALCS FVM-CS-075

• h" a Resolution is included in PCHVP

++ In-progress f

g e Spec. No. 2320-SS-30

. M

lj l

N Y O I

T T C

DS I

O EC U u R M P T MS S O N I C O NN

, C IO OI T T V AA S S C LL S CT I

RA T BT N LS AS _

E A E FN CT 0 M

D 3 9 E w 3 0 u

B 2 -

M 3S E 2S E

T E

R C

N O

C R

O F ,'

E N S O P 701 T TS I 5 RS RG T R 2 ON C D0 1

v P OC A A d P - j PL PWI S B - PM PA P A R D S UC U E C CP S S R T D N

I F6 P T A N C E

M C U E >

C W 5 O S 5 D 0 V v -

N P G

I P

S N E G D I S

E D

S S

'R E OR U

u CD E

C O w

_ NR

, OP c

8 e

.I!

1 LOAD VERIFICATION FOR CONCRETE PER PP - 210 1

NUMBER WALLS STRUCTURAL SLABS ELEMENTS COLUMNS BEAMS y

SELECT SAMPLE V

RELD WALKDOWN AS-BUILT ATTACH.

INFORMABON PER CPE-SWEC-FVM-CS-075 V _

REQUEST LOADS PER PP-073 AND ECE 5.11-04 V

CONRRM LOAD ALLOWANCE I

ACA.%%:

. t r

Sumary of Audit on April 6,1988 -3 -

4 ,

Anchorage Type Exponent Used Basis grouted bolt 1 analytically conservative 1 Richmond inserts 4/3 vendor recommended ,

thru. bolt 1 (concrete) analytically conservative l 2(steel) AISC Manual Hilti Kwik. Bolt 5/3 test data

. embedded bolt 1 analytically conservative embeddedplate(Nelsonstud) 5/3 m endor recommended No open or unresolved items were identified as a result of this audit.

l David Terao, Mechanical Engineer Comanche-Peak Project Division j

Office of Special Projects ,

i

Enclosures:

1

1. List of Participants

2. Overview Slides  !

cc:,See next page Dist_ribution:

Dici.et F11e

'NRC PDR Local PDR ,

j CPPD Reading  ;

1 OSP Reading S. Ebneter/J. Axelrad C. Grimes  :

1 P. McKee J. H. Wilson J. Lyons t i R. Warnick M. Malloy 3 s A. Vietti-Cook

, CPPD.LA  :

! J. Moore. 0GC

F. Miraglia 7 J

E. Jordan J. Partlow l 1 D. Terao j ACRS  ;

I 0FG :CPPD:05P M:CP Q P \ :AD:CPP :05P :  :  :  :

... . L....:............:............:...........:........... s NAME :DTerao:cb :MMallo,~~p:JLy :  :  :  :  :  !

~! ..... : ...h88.......:.........p.:............:............:............:...........:...........

2 DATE :4/ :4//f/88 :4/f6/88  :  :  :  ;

0FFICIAL RECORD COPY j