ML20096C263

Requests Info Re Discrepancies Discovered During Walkdown of Various Cable Tray Supports to Assure as-built Condition Reflects Designed Support,Per Independent Assessment Program,Phase 4

ML20096C263
Person / Time
Site:	Comanche Peak
Issue date:	08/23/1984
From:	Williams N CYGNA ENERGY SERVICES
To:	George J TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
References
84056.026, NUDOCS 8409050186
Download: ML20096C263 (9)

Text

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$8evsCf5 101 Californsa S? set. Suite 1000, San Francisco, CA 941115894 415 397 5600 August 23, 1984 84056.026 Mr. J. R. George Project General Manager Texas Utilities Generating Company Comanche Peak Steam Electric Station Highway FM 201 Glen Rose, Texas 76043

Subject:

Cable Tray Support Walkdown Questions Comanche Peak Steam Electric Station Independent Assessment Program - Phase a Texas Utilities Generating Company Job Wo. 84056

Dear Mr. George:

Cygna conducted a walkdown of the various cable tray supports to assure that the as-built condition properly reflects the designed support. Several discrepan-cies were discovered during the course of the walkdown. These discrepancies are listed in Attachment A. Please provide the information requested for each item.

If there are any questions, don't hesitate to call.

Very truly yours, thF 4 #de4 N. H. Williams Project Manager dmm Enclosure ..

cc: Mr. S. Burwell (US NRC)"

Mr. S. Treby (US NRC)

Mr. D. Wade (TUGCO)

Ms. D. Van Amerongen (EBASC0/TUGCO)

Mrs. J. Ellis (CASE)

Mr. R. Rallard (GAH) v 8409050186 040923 Ah F '

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Mr. J. R. George August 23, 1984 84056.026- Page 1 of 3 ATTACHMENT A CABLE TRAY SUPPORT HRLKD0ldt WESTIONS Cable Tray Supports - Concrete Expansion Anchors

References:

1. Rrown A Root, Inc., Instruction CEI-20, revision 9. "Installa-tion of Hilti Drilled in Bolts."

2. Rrown A Root, Inc., Drawing FSE-00179, revision 14 " Attach-ments for Cable Tray Hangers."

l 3. Gibbs A Hill, Inc. Drawing 7323-S-0901, revision 4 l

l 4 Gibbs A Hill, Inc. Drawing 2373-S-0903, revision 5

5. Gibbs A Hill, Inc. Drawing 2323-S-0905, revision 2.

Cygna conducted field inspections for selected cable tray supports within the project scope. For a number of inspected supports, discrepancies were noted between the installed anchorage configuration and that specified in references 1 through 5. Table 1, attached, provides a listing of these supports and a description of the discrepancies.

The results are discussed below.

1. Incorrect Type of Hilti Anchor Bolt Many of the typical connection details for cable tray supports (references 2 through 5) require the installation of Hilti Super Kwik Rolts. The method of identification for installed Hilti bolts is defined in reference 1, paragraph 3.1.3.3:

Hilti Super Kwik Bolts shall be additionally marked with a " star" on the end which will remain exposed l upon installation. This marking will be performed

! by the craft in a manner which does not obliterate

! the length marking. The stamp shall be controlled l by the cognizant QC Inspector.

l l Cyg.1a noted the Hilti bolts for inspected hangers which required Super Kwik Rolts were not stamped with a star (*). These results l indicate that the installed bolts Fay be Hilti Kwik Rolts instead of Super Kwiks or the craft and OC are not following established procedures.

Please determine what type of bolts are actually installed by means of existing documentation and justify any discrepancies between the design and installation if necessary.

1

l Mr. J. R. George August 23, 1984 )

84056.0?6 Page 2 of 3 ATTACHMENT A CABLE TRAY SUPPORT WALKDOWN (RIESTIONS

2. Incorrect Anchor Bolt Diameter Cable tray support number 332 is a type Detail "A" as shown on drawing 2323-El-0700-01-S. Cygna's walkdown results indicate that this support uses three 1" (P) Hilti Kwik Bolts. Reference 2, sheet 19, indicates that connection is to be per Detail "C" shown on reference 4 Reference 3 requires 1-1/4" diameter Hilti Super Kwik Bolts with embedments of 8-1/2", 10-5/8" or 13-1/8" depending on the attachment eccentricity.

Please provide Cygna with justification and documentation for the use of 1" diameter Hilti Kwik Bolts.

3. Insufficient Number of Rolts Cable tray support number 408 is a type 84 Cygna's inspection indicates that the north leg of this support is attached to the i

bottom of a concrete beam with one anchor holt. Reference 2, sheet 7 indicites that case B4 requires two 1-1/4" x 10-5/8" Hilti Super Kwik Rolts.

Please provide Cygna with justification and documentation for using a one-bolt connection.

4 Insufficient Embedment length Cable tray support number 481 is a type L-A 4. Cygna 's walkdown results indicate that the lower brace of this support is attached with two 1-1/4" (T) Hilti Kwik Bolts. Reference 2, sheet 4 " Hanger and Brace Connection for Longitudinal Cable Tray Supports - Using Hilti Bolts" requires that case L-A4 employ two 1-1/4" x 13-1/8" Hilti Super Kwik Bolts to attach the brace. A bolt of length code "T" (12" - 13") cannot provide 13-1/8" embedment.

Please provide Cygna with justification and documentation for the use of an anchor holt with a smaller embedment length then specified by the design drawings.

5. Support Number 3026, Type SP-4, Gibbs A Hill Drawing 2323-S-0403 Cygna's walkdown noted that the spacing of a 1-1/4" (U) Hilti Kwik expansion anchor is 8-1/2" from a 1-1/4" bolt on support number 3360 This spacing is less than the 10 holt diameter requirement.

No reduction in holt capacity has been calculated for either holt in accordance with Gibbs A Hill specification P373-SS-30, revision 1.

Please provide Cygna with justification and documentation that the capacities of the anchor bolts for each support are adequate to

me cw w Mr. J. R. George August 23, 1984 84056.026 Page 3 of 3 ATTACHMENT A CARLE TRAY SUPPORT WALKDOWN OUESTIONS

(

resist the applied loads when bolt spacing and the installed configuration (reference Cygna letter 84042.022, question 5) are considered.

6. Cygna's Phase 4 review of the cable tray supports included an assessment of whether or not the design requirements such as:

member size, bolt diameter, and weld configuration, were all properly represented on the Gibbs & Hill design drawings as well as the Brown & Root FSC-00159 and FSE-00179 series construction d rawings. Cygna's reviewers, who were familiar with the design requirements, were not able to easily determine from the FSE series drawings which concrete connections were required for a given hanger frame configuration. References on the FSE-00179 drawing refer to the Gibbs & Hill design drawings rather than another sheet of the

, FSE-00179 series.

The FSE-00159 drawing series does not specify the concrete connec-tion to be used for the specific support. Rather, note 1 of all FSE-00159 drawing sheets states that the connection configuration is to be selected by the contractor in accordance with Brown A Root drawing FSE-00170 (reference 1). Rrown & Root construction proce- I dure ECP-10. revision 6 also specifies in section 3.1.P.2 that the selection of the concrete connection detail shall be made in the field by the contractor in accordance with construction FSE-00179 (reference 1).

Cygna is concerned that if someone familiar with the design calcula-tions and assumptions has difficulty with identifying the appropri-ate connection detail, how can one reasonably expect construction personnel to choose the correct connection detail. Please provide Cygna with the following:

(1) A detailed description of the procedures which specify the process the contractor uses to select the appropriate connection details.

(2) The process or procedure by which quality control in-spectors verify that the appropriate concrete connection detail has been installed.

l 4

TJWLE 1.

CARLE TRAY SUPPORT ARCHARAGE DISCREPANCIES Support Support Anchor Bolt Configuration Anchor Bolt Requirements Copenents Per Field Inspection (See Note 3)

(See Note 2)

============================================================================================================ l 202 Case A4 North Leg: One 1-1/4" (T) HKB One 1-1/4" x 10-5/8" HSKB or 1. Requires Hilti South Leg: Two 1-1/4" (T) HKB Two 1-1/4" x 8-1/2" HSKB Super Kwik per FSE-00179 Sheet 6 Bolts 332 Detail "A" Three 1" (P) HKR Three 1-1/4" x 8-1/2" HSKB 1. Wrong Bolt 2323-El- per FSE-00179, Sheet 19, Diameter 0700-01-S use Detail "C" on S-0903 2. Requires Hilti and per 2323-S-0903, Super Kwik Detail "C" Bolts 408 Case R 4 North Leg: One bolt Two 1-1/4" x 10-5/8" HSKR 1. Requires (size not determined) per FSE-00170, Sheet 7 minimum of two holts 455 Case SP R Wall Attachments: Two 1-1/4" Two 1" x 7" HKB , e < 0.2h 1. Angle must (T) HKR each per FSE-00179, Sheet 1, attach between South: spacing (h) = 15", Detail R and 7323-S-0903, two anchor attachment below lower Case SP-R bolts on wall holt clip North: spacing (b) = 21",

e = 0.20h 479 Detail "C" Two 1-1/4" (T) HKB Two 1-1/4" x 8-1/2" HSKB 1. Requires Hilti 7323-El- per FSE-00174, Sheet 19, Super Kwik 0500-01-S the support connections are Bolts the same as SP-1. Reference 2323-S-0903 for Case SP-1.

Sheet 1 of 5

TARLE 1.

! CNBLE TRAY SUPPORT AIDEORAGE DISCREPANCIES l

Support Support Anchor Bolt Configuration Anchor Rolt Requirements Consnents l Per Field Inspection (See Note 3)

(See Note 2) - ,

33333E3333333333333=E333333333323==E23B33333=2323E3333333=3223332E222233333333333333332233333333333333333333 481 Case L-A g Legs: Two 1-1/4" (T) HKR each legs: Two 1-1/4" x 10-5/8" 1. Leg connection Upper Brace: Two 1-1/4" (P) HSKB requires Hilti HKB Upper Brace: Two 1" x 7" Super Kwik Lower Brace: Two 1-1/4" (T) HSKB Bolts HKR Lower Brace: Two 1-1/4" x 2. Lower brace  :

13-1/8" HSKB requires Hi1ti per FSE-179, Sheet 4 Super Kwik Bolts of a greater length SRo Case A j tegs: One 1-1/4" (T) HKR each Legs: One 1-1/4" x R-1/?" 1. Requires Hilti HSKR Super Kwik per FSE-00179, Sheet 6 Rolts

' 590 Case A 3 West Leg: one 1-1/4" (T) HKit One 1-1/4" x 8-1/2" HSKR or 1. West leg East Leg: One 1" R.I. and Two 1" x 7" HKB requires Hilti

, one 1-1/4" (P) HKB per FSE-00179, Sheet 6 Super Kwik I Bolt l

l 605 Detail A Two 1-1/4" (T) HKB Two 1-1/4" x 8-1/8" HSKB 1. Requires Hilti 2323-El- per FSE-00179, Sheet 19 Super Kwik l

0500-04-S Bolts 648 Case A g Legs: One 1-1/4" (T) HKR each Legs: One 1-1/4" x 8-1/2" 1. Requires Hilti HSKR Super Kwik per FSE-00170, Sheet 6 Rolts Sheet 2 of 5 i

. TARLE 1.

CARLE TRAY SUPPORT ANCHORAGE DISCREPANCIES Support Support Anchor Rolt Configuration Anchor Rolt Requirements Comments ,

Per Field Inspection (See Note 3)

(See Note 2)

===================_=================================,==========================================

649 Case A t Two 1-1/4" (T) HKB on a Twc 1-1/4" x 13-1/8" HSKB' 1. Requires Hilti common angle shared by per(2323-S-0903, Detail 1 Super Kwik both legs. Alternate and Note 2 for Bolt of a Detail 1 greater length 722 Detail "N" B race: Two 1-1/4" (W) HKB Brace: Two 1" x 7" HKR 1. Brace 2323-El- spacing (b) = 16" 12" < b < 30", e < 0.3b attachment 0601-01-S eccentricity (e) = R" (brace per FSE-00179, Sheet 19 eccentricity is attached at top bolt) exceeds allowable 758 Petail "V" Legs: Two 1-1/4" (T) HKR each Two 1-1/4" x R-1/2" HSKR 1. Requires Hilti 2323-El- per FSE-00179, Sheet 19: Super Kwik

, 0601-01-S " Case R 3

," and Case B3 , R lts Sheet 7 2607 Detail "W" East End Attachment to Wall Two 1-1/4" x 10-1/2" HSKR 1. Requires Hilti 2323-El- Two 1-1/4" (U) HKR per CMC 32513, Rev. 1, Super Kwik 0601-01-S Sheet 3/4 Rolts 2989 Case A4 Legs: One 1-1/4" HKB each One 1-1/4" x R-1/2" HSKB 1. Requies Hilti (length stamp illegible) per FSE-00174, Sheet 6 Super Kwik 4

Bolts

.i Sheet 3 of 5

TNtLE 1.

CABLE TRAY SUPPORT ANCHORAGE DISCREPANCIES Support Support Anchor Bolt Configuration Anchor Bolt Requirements Comments Per Field Inspection (See Note 3)

(See Note 2)

============================================================================================================ 7 2998 - Special Type Base Plate: Three 1-1/4" (U) Three 1-1/4" x 8-1/2" HSKB 1. Requires Hilti per CMC 6114 HKB per CMC 6114, Rev. 6, Super Kwik Sheet 2 Bolts 3076 Case SP-4 Reams: Two 1-1/4" (II) HKR Two 1-1/4" x 10-5/8", HSKR 1. Requires Hilti (Omit Brace) each at wall per FSE-00179 "Special Case Super Kwik Attachnent Chart," Sheet 2 Rolts and Detail D, Sheet 1 3134 Detail "11" Ream: Four 1-1/4" HKR Ream: Four 1-1/4" x 13-1/8" 1. Requires Hiiti 2373-S-0905 Braces: Two 1-1/4" HKR HSKR per 2323-S-0905, Super Kwik Section 11A - 11A Rolts Brace: Two 1-1/4" x 10-5/8" HSKa per 2323-S-0903, Detail G 5807 Case L-A 1 Base Angie: Three 1-1/4" (T) Three 1-1/4" x 10-5/8" HSKR 1. Requires Hilti HKB each per FSE-00179, Sheet 4 Super Kwik Bolts 629 Case SP-7 Brace: Two 1-1/4" (U) HKB Brace: Two 1-1/4 x 8-1/2" 1. Requires Hilti w/B race HSKB, per DCA 2769, Super Kwik Rev. 4, Page 2 Rolts 720 Case SP-7 Ream: Two 1-1/4" (T) HKB Beam: Two 1-1/4" x 10-5/8" 1. Requires Hilti HSKB, per FSE-00179, Super Kwik Sheet 2, Section A-A Bolts Sheet 4 of 5

..t. .

TABLE 1.

CARLE TRAY SUPPORT ANCHORAGE DISCREPANCIES Support Support Anchor Rolt Configuration Anchor Bolt Requirements Comments Per Field Inspection (See Note 3)

(See Note ?)

================================================================================================

1 790 Case Heam: Three 1-1/4" (U) HKR Ream: Three 1-1/4" x 10-5/B" 1. Requires Hilti  ;

(2) SP-7 HSKB, per FSE-00179, Super Kwik i Sheet 2 " Multiple Bolts SP-7 Supports" 2920 Case .

Hrace: Two 1-1/4" (T) HKB Rrace: _Two 1-1/4" x 8-1/2" 1. Requires Hilti (2) SP-7 HSKR per DCA 2769, Super Kwik w/B race Rev. 4, Page 2 Rolts 3023 Detail "F" Three 1-1/4" (T) HKB Three 1-1/4" x 10-5/8" HSKB 1. Requires Hilti 2323-El- per FSE-00179, Sheet 19: Super Kwik 4 0601-01-S . "Similar to SP-7" Sheet 2: Bolts

" Multiple SP-7 Supports" NOTES:

1. The following abbreviations are used:

RI = Richmond Inserts HKR = Hilti Kwik Bolts HSKB = Hilti Super Kwik Bolts

2. The field inspection determined holt diameter ov' length code. Length codes shown as (U), (T),

(P), etc., per CEI-20, Attachment 4, revision 9, which lists overall bolt length.

3. Anchor holt requirements given are the bolt diameter and minimum embedment length as specified in Note 14(e) on drawing 7323-S-0901, revision 4 l

q Sheet 5 of 5 1

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