ML20141K403

Trip Rept of 851118-22 Audit of Cable Tray Hanger Walkdown. Supports Walked Down & Noted Discrepancies Listed

ML20141K403
Person / Time
Site:	Comanche Peak
Issue date:	12/02/1985
From:	Lipinski R NRC - COMANCHE PEAK PROJECT (TECHNICAL REVIEW TEAM)
To:	NRC - COMANCHE PEAK PROJECT (TECHNICAL REVIEW TEAM)
Shared Package
ML20141K361	List: ML20141K357 ML20141K373 ML20141K376 ML20141K381 ML20141K383 ML20141K394 ML20141K403
References
NUDOCS 8601220498
Download: ML20141K403 (5)

Text

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DOCKET NO.: 50-445/446 MEMORANDUM FOR: File FROM: R. Lipinski, Comanche Peak Project TRT

SUBJECT:

TRIP REPORT - AUDIT OF CABLE TRAY HANGERS (CTH) WALKDOWN - COMANCHE PEAK PROJECT, UNIT 1 From November 18 through November 22, 1985, an audit of CTH walkdown was conducted by the Comanche Peak Project TRT, Civil / Structural Group.

The audit group was divided into two teams: two men to a team. An escort was provided to each team by Ebasco, who was familiar with the procedure of the s walkdown and location of CTH scheduled for the audit. The CTHS audited were taken from the list provided by the TUGCO, which listed the CTH's whose walk-down of which was completed as of October 31, 1985. Out of the 789 CTHs provided by the

, TUGCO, 64 were randomly selected. This represents twice the number of the CTHs 1 actually audited because of the anticipated inaccessibility to some of the CTHs. Out of the 64 color copies of " red-line drawings" of the CTHs provided by TUGCO, 32 were selected for the audit on the basis of distribution according to the location and type of the supports.

The audit group consisted of two teems as follows:

Team #1 Team #2 Eric Solla R. Lipinski T. Langowski J. Dale R.Muldoon(Ebasco) K.Bronson(Ebasco)

The CTHs audited by the TRT are listed below. Each CTH was audited using Attachment 1 as a guide. The escorts were notified about the discrepancies found during the audit.

Following is a list of the supports walked down and the discrepancies encountered:

CTHs walked down by Team #1

1. CTH-1-5757: No problem.

2. CTH-1-5837: No problem.

3. CTH-1-13026: No problem.

4. CTH-1-5817: (a) Bottom two tiers are 1 member size smaller than what is shown on the drawing.

(b) Tray 1 is a 4" x 24" not a 4" x 12" as shown on the drawing.

(c) Tray 2 is.a 4" x 24" not IA as shown on the drawing.

(d) Bolts G1 and G2 are given as type " BEVEL." Actual type is A307 and A449.

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DEC 21995 (e) Conduit fil span is t:o sh:rt.

5. CTH-1-5787: (a) Angle under tray was given as 3-1/2" x 2-1/2" x 5/16 with the 2-1/2" marked IA. Angle is actually 3-1/2" x 5" x 7/16".

(b) Weld of angle to baseplate marked IA but only weld on leg under tray was inaccessible the other leg was accessible.

6. CTH-1-239: (a) Span lengths incorrect. Four-inch dimension is 12" and 4'-0" dimension is 4'-10".

(b) Bolt G dimension given as 2-13/16" and 2-5/8" but actually measure as 2-1/2" and 2-3/4".

7. CTH-1-42: (a) Bolt #1 G dimension given as 2-1/8", actual dimension is 3-1/8".

(b) Welds #4 and #8 are written up as U.S. measuring 3/16".

Actual measurement is 1/4" which is what is called for.

(c) Tray clamps 3 and 4 marked IA but have beveled washers on them.

8. CTH-1-12075: (a) Tray clamp is shown as Type B,1/2" plate welded to channel. Actual tray clamp is Type C, bolted to channel.

(b) Weld symbol of channel to angle is reversed.

9. CTH-1-6041: No coments.

10. CTH-1-5942: (a) Weld il arrow side is given as 5/16" but measures 1/4".

(b) Channel C4x5.4 is actually a C4x7.25.

(c) 7-5/8" dimension to edge of column is actually 8-5/8".

i 11. CTH-1-636: (a) Weld #1 measures 1/4" both sides. Drawing shows 1/4" NS and 3/16" FS.

12. CTH-1-707: No comments.

13. CTH-1-607: (a) Support is marked inaccessible but baseplates are accessible for dimensioning.

14. CTH-1-1853: (a) Weld sizes for top of angle brace are given backwards.

(b) Gap under Richmond Insert is greater than 1/16"

15. CTH-1-1742: No coments.

16. CTH-1-1716: (a) Bolt #2 has 2-S/4" projection given. Actual projection 2-3/8".

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17. CTH-1-1695: No coments.

18. CTH-1-1845: (a) Bolt projections 3-3/4" and 3-3/8" given. Actual projections are 3" and 2-3/4".

(b) Tray clamp G1 contains no bolt and washer as called out in table. G1 is a Type B (welded) clamp.

(c) Tray clamp G2 contains a bevel and flat washer. Table shows only bevel washer.

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-a '/ GS (d Angle at wall rotated 90 degrees.

(e Dimension against wall between attachments is wrong.

(f Dimension of W.P. in Detail A is wrong.

(g Weld size in Detail B is given as 1/2". Actual weld size is 3/16".

CTHs walked down by Team #2

1. CTH-1-4738: Weld #1 undersized; the actual size 1/16-1/8" vs required of 3/16".

2. CTH-1-5538: Weld #2 - The 1/2-inch plate by the tray (side) had 30 1 bevel instead of 45* required. The tolerance is 5 1

3. CTH-1-5517: (a) Tray 3 dimension was marked as IA but could be measured (18" x 14").

(b) Structural bolts were found to be A325 - walkdown inspector marked as IA. (Inaccessible)

(c) Plate on the side of the tray was found to be 4-1/4" contrary to 3-3/4" shown on the drawing.

(d) Bevel on 1/2-inch plate was out of scope measured 36-38" (vs 40-45") required.

e Weld #1 undersize (1/4" vs 5/16").

f Welds #5 and #6 found correct - not undersized.

4. CTH-1-5488: (a) Dimensions to the top of vert member are missing.

(b) Weld was undersized (3/16" vs 1/4") over about 50% of the length, l

5. CTH-1-6497: No coments.

6. CTH-1-6517: No coments.

7. CTH-1-5976: (a) Distance to the back of the channel was 3-1/4" vs 3" onthedrawing(Sect.B-B).

(b) HKB projection was 3" vs 3-1/2" on the drawing.

8. CTH-1-6559: No coments.

9. CTH-1-6631 (a) Fillet on Weld #1 undercut on both sides.

(b) Standard hex nut installed instead of heavy duty.

10. CTH-1-7047: (a) Welds in Sect. B-B and C-C were marked as unsatisfactory while they could not be detemined by visual inspection.

(b) Weld on one side was J-bevel in lieu of fillet as called on the drawing.

11. CTH-1-5352: No coments.

12. CTH-1-1963: (a) Dimension of elevation of tray support was off by 3" (Elev.A-A).

(b) Note made by walkdown engineer was incomprehensible.

TRT agrees with walkdown inspector that'the welds are undersized.

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13. CTH-1-7199: No coments.

14. CTH-1-207: No coments.

During the exit meeting on 11/22/85, after completion of the walkdown audit.

TUGC0 and EBASCO representatives have been informed about the audit results.

The list of the attendees at the exit meeting is attached.

R.z.$p'w-R. E. Lipinski

' Comanche Peak Project TRT I'

cc: L. Shao

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