ML20138D280
| ML20138D280 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 12/10/1985 |
| From: | Landers D TELEDYNE ENGINEERING SERVICES |
| To: | Noonan V NRC - COMANCHE PEAK PROJECT (TECHNICAL REVIEW TEAM) |
| References | |
| 6410-24, NUDOCS 8512130183 | |
| Download: ML20138D280 (21) | |
Text
4
'RTELEDYNE ENGNEERING SERVICES 130 SECOND AVENUE WALTH AM, MASSACHUSETTS 02254 (617) 890-3350 TWX (7101324-7508 December 10, 1985 6410-24
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n Mr. Vince Noonan, Project Director
- Y Comanche Peak Project U. S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Division of Licensing Mail Stop P-234 Washington, D. C.
20555
Dear Mr. Noonan:
Attached please find our preliminary Trip Report for our visit to Comanche Peak Steam Electric Station on November 18-22, 1985.
If you have any questions please do not hesitate to contact me.
Very truly yours, TELEDYNE ENGINEERING SERVICES A ALL*/
Donald F. Landers Executive Vice President DFL/lh Attachment (Trip Report No. 2182) cc: L.Shao(USNRC)
C. Trammell (USNRC)
C. Poslutny (USRNC)
D. Jeng (USNRC) 6410 File (TES) 1 12130183 851210 S(h ADOCK 050c0445
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TN ENGMEERING SERVICES TRIP REPORT NO. 2182 VISIT TO COMANCHE PEAK STEAM ELECTRIC STATION NOVEMBER 18 - 22, 1985 The purpose of this trip was to audit the walkdown of the unit 1 cable trays which is being performed by EBASCO. Five percent of the 789 walkdowns co:apleted so far were chosen for the walkdown.
The following is a list of the supports walked down:
Reactor Building Fuel Buildings CTH-1-42 CTH-1-1695 CTH-1-239 CTH-1-1716 CTH-1-4738 CTH-1-1742 CTH-1-5488 CTH-1-1845 CTH-1-5517 CTH-1-1853 CTH-1-5538 CTH-1-1963 CTH-1-5757 CTH-1-5352 CTH-1-5787 CTH-1-7047 CTH-1-5817 CTH-1-5873 Control Building CTH-1-5942 CTH-1-7199 CTH-1-5976 CTH-1-6041 Safeguards Building CTH-1-6497 CTH-1-207 CTH-1-6517 CTH-1-607 CTH-1-6559 CTH-1-636 CTH-1-6631 CTH-1-707 CTH-1-12075 CTH-1-13026 We split into two teams of two each with an escort supplied by EBASCO who was familiar with the walkdown procedure and location of the hangers.
The teams were:
Team #1 Team #2 Eric Solla R. Lipinski Terry Langowski Jim Dale Ronald A. Muldoon (EBASCO)
Kim B.Bronson (EBASCO)
A copy of the red-lined drawings and a copy of the walkdown procedure were used for the walkdown. Each support was walked down by one of the teams using the procedure in Attachment 1.
Each time a discrepancy was found the EBASCO escort was shown the discrepancy.
i
TM ENGSEERNG SERVICES The following is a list of the supports walked down by team #1 and the problems encountered:
1.
CTH-1-5757:
No problem.
2.
CTH-1-5873:
No problem.
3.
CTH-1-13026: No problem.
4.
CTH-1-5817:
(a) Bottom two teirs 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 & G2 are given as type "8EVEL".
Actual type is A307 & A449.
(e) Conduit #11 span is too short.
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.
4" dimension is 12" &
4'-0" dimension is 4'-10".
(b) Bolt G dimensions given as 2-13/16" & 2-5/8" but actually measure as 2-1/2 & 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 & 8 are written up as U.S. measuring 3/16".
Actual measurement is 1/4" which is what was called for.
(c) Tray clamps 3 & 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 comments.
10.
CTH-1-5942:
(a) Weld #1 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".
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TN ENGNEERNG SENICES 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 coments.
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 2-3/4" projection given.
Actual projection 2-3/8".
17.
CTH-1-1695:
No coments.
18.
CTH-1-1845:
(a) Bolt projections 3-3/4" & 3-3/8" given. Actual projections are 3" & 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.
(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 8 is given as 1/2". Actual weld size is 3/16".
Details of supports not listed here were taken by team #2 and will be contained in a separate report.
On Friday, November 22 an exit meeting was held in which the findings were presented. The people present are shown in Attachment 2.
Eric A. Solla EAS:jmc Enclosures cc: DFL JAF WJC Trip Report File
ATTACHMENT 1 MISC 8 (11/15/85)
Plan For NRC Site Visit November 18-22, 1985 To Review TUEC/EBASCO Cable Tray Walkdown (TNE-AB-CS-1)
Purpose:
The purpose of this site visit is to review the work done by TUEC/EBASCO to verify the accuracy of the as-built data that will be used for input to the cable tray design verification. The TUEC/EBASCO work has been done using "As-Built Procedure Cable Tray Hanger Design Adequacy Verification."
The NRC field walkdowns will be performed by two-man teams consisting of:
R. Lipinski E. Solla
,K. Grahm T. Langowski Methods:
(1) Review the as-built data in general and the TUGC0 procedure used to gather it. The procedure review should include a review of the attributes investigated, the methods used to measure them and the tolerances used.
(2) A copy of the walkdown data packages shown in Attachment A will be obtained. Attachment A is a random sample of the 739 completed walkdown packages. The NRC will group these packages by building and type.
i (3) A sample from each of the buildings will be selected by the NRC. The NRC will perfonn a field walkdown to verify the TUEC/EBASCO walkdown data.
The methods used for verifying the attributes are included in Attachment B of this plan.
In the event that a selected support is found to be inaccessible, another similar support from the same building will be substituted.
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(4) The NRC walkdown teams will use the " redline drawings" as a baseline for walkdown verification. The redline drawings will be checked for the attributes detailed in Attachment B.
The " redline drawings" will be marked with a yellow highlighter upon verification of correct dimension.
A red color pen M will be used to identify dimensions which are found to be outside the tolerances of Attachment B.
The correct dimension will be noted with the letters "NRC" located nearby.
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ATTACHMENT B NRC Cable Tray Walkdown Attributes I.
The following attributes shall be verified by the "as-built" walkdown engineers:
1.
Hanger Function Hanger function, i.e., multidirectional, transverse or longitudinal.
2.
Hanger Configuration a.
Member shape and nominal size as per AISC.
b.
Dimension, including addition of required dimensions.
3.
Member Connection Details (Connection to support member) a.
Welds shall be verified by comparing to drawing.
b.
Bolts (1) Size (2) Quantity (3). Type (A307, A325, A449 or A490)
(4) Spacing c.
Bolt Holes - The existence of unused bolt holes in structural steel.
(1) Unused holes greater than 3/4-inch diameter.
(2) Unused holes spaced 2-inches or less (measured center to center) from a bolt or an unused hole.
(3) Two holes (used or unused) located in the same cross-sectional plane. A cross-section is a section normal to longitudinal axis of the member.
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4-ATTACHMENT B (cont.)
4.
Support Anchorage a.
Surface mounted plate or angle (size and thickness) b.
Anchor Bolts (1) Type (a) Thru bolts j
(b) Richmond Screw Anchors (c) Expansion anchors (Hilti, Kwik, or Super-Kwik Bolts) 1.
Size 2.
Material (A325,A490,etc.)
3.
Quantity (d) Location of member with respect to bolts (e) Bolt distance from heel of angle or channel, etc.
(Gage "G" dimension)
(f) Expansion anchor bolt projection and/or embedment l,
(Table 12)
(g) Expansion Anchor Bolt Marking (Table 11) 5.
Anchor Bolt Spacing a.
Spacing between expansion anchor bolts on the same fixture.
b.
Spacing between expansion anchor bolts on separate adjacent i
fixtures (Table 6).
c.
Spacingbetweenexpansionanchorboltsandangles(usedfor
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watertight doors and/or concrete removable block openings) and embeded plates (Table 4).
[
d.
Spacing between expansion anchor bolts and the edge of concrete I
or abandoned' anchor bolt holes or unused expansion anchor bolts
)
(Table 5).
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6.
Tray Clamps a.
Clamp Type (1) Bolted (a) Flat washer or bevel washer.
(2) Welded (a) Weld size and weld length will be verified (3) Modified clamp to be identified by the "as-built" walkdown engineer and will be verified.
7.
Cable Trays a.
Width b.
Depth c.
Location within support 8.
Additional Attachments to CTH a.
Type (i.e., conduit-diameter) b.
Span length to next support of the attached item on each site of the support.
9.
Bearing Behind the Baseplate or Angle a.
The existence of a gap greater than 1/16" (within the envelope of 6" x 6" with expansion anchor bolt at center) behind the plate or angle and concrete surface shall be measured and located relative to the edge of plate or angle.
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ATTAC RM G N T A. Sg,(
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Reactor Building 39 Supports out of 489 CTH-1-0042 CTH-1-6497
-0077
-6517
-0239
-6525
-4738
-6556
-5226
-6559
-5469
-6574
-5473
-6620
-5488
-6631
-5491
-12075
-5509
-12078
-5517
-13026
-5538
-13107
-5742
-5750
-5757
-5769
-5771
-5787
-5817
-5873
-5908
-5942
-5952
-5958
-5976
-6025
-6041 4
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ATTACHMGMT A S H.E l
Safeguards Building 10 Support out of 95 CHT-1-0207
-0249
-0607
-0636
-0658
-0707
-0806
-0932
-13165
-13170 Control Building 1 Support out of 1 CTH-1-7199 Fuel Handling Building 14 Supports out of 147 CTH-1-1695 CHT-1-1963 CTH-1-7097
-1704
-5352
-7099
-1716
-6945
-1724
-7002
-1742
-7047
-1845
-1853 Auxiliary Building 2 Supports out of 7 CTH-1-3024 i
-3028 j
A7TACHME rq 'r3 sucz 4 i
% 'I 1fINDiN CLEAPMCES TO EMBEDDED Pl.m5 1.
hhere embedded steel plates are unoccueied by attac.%ents for a minimum distance of 12 inches on both sides of a proposed Hilti Bolt location, the center of the bolt may be as close as practical to edge of the plate withcut da= age to plate.
2.
hhere the embedded steel elates are occucied by attachments within minimum distances 'shown above, the minic:.ra clearance to Milti Anchors shall be as follows:
Hilti Anchor Nelson Stud Edge of Plate Si:e to Hilti Ancher to Hilti Ancher 1/4 5 1/4 3 3/4 3/8 5 7/8 4 3/S 1/2 6 1/2 5
5/8 7 1/8 5 5/8 3/4 7 3/4 6 1/4
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7 1/2 1 1/4 10 1/4 8 3/4 Dimensions are in inches.
Distance measure with reference to center of bolts and studs.
hhere location of the nearest Nelson Stud can be de emined from the "S" sta=ps on the embedded steel plate, the mini =um center-to-center clearance to the Hilti Anchor as shown above shall govem. hhere location of the nearest Nelson Stud cart.ot be so detemi.ned, the minirman clearance to " Edge of Plate as shown above shall govem.
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D"5 A TTACMM GNT "S" MINIMLM BOLT CLEARANCES
- Sp.g (INCHES)
MINIMLt DISTANCE TO Abandoned Hilti Bolts Hilti Richmond or Holes and Bolt Size Screv Anchors
- Concrete Idee
- E= bedded Ancher 1-inch 1 1/2 inch Solcs enat are Cut Off==
1/4 7 5/8 12 1/4 1 1/4 1/2 3/8 8 1/4 12 7/8 1 7/8 3/4 1/2 8 7/8 13 1/2 2 1/2 1
5/8 9 1/2 14 1/8 3 1/8 1 1/4 3/4 10 1/8 14 3/4 3 3/4 1 1/2 1
11 3/8 16 5
2 1 1/4 12 5/8 17 1/4 6 1/4 2 1/2 Measured center-to-center of bolts and bole center-to-edge of concrete in inches.
Minimum spacing between holes covered by this column shall be measured center-to-center and based on size of hole being drilled (e.g., pilot hole spacing is based on pilot bit size).
Locations closer than the abovw distances are appropriate only with approval of the engineer.
Hilti bolts may be installed as diese as practical to unused Richmond Screv Anchors which have been plugged (i.e., grouted. Rich =ond screw-in plug or snap-in plug. etc.).
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nur6 AT TAC H A164 T " B' MINDfLH SPACING BET'wTEN HILTI EXPANSION BOLTS 58 3 Hilti Solt CENTER-TO-CENTER SPACINC T0:
Size 1/4" 3/6" 1/2" 5/8" 3/4" 1"
1 1/ /."
1/4 2 1/2 3 1/8 3 3/4 4 3/8 5
6 1/4 7 1/2 5/16 2 13/16 3 7/16 4 1/16 4 11/16 5 5/16 6 9/16 7 13/16 3/8 3 1/8 3 3/4 4 3/8 5
5 5/8 6 7/8 8 1/8 1/2 3 3/4 4 3/8 5
5 5/8 6 1/4 7 1/2 8 3/4 5/8 4 3/8 5
5 5/8 6 1/4 6 7/8 8 1/8 9 3/8 3/4 5
5 5/8 6 1/4 6 7/8 7 1/2 8 3/4 10 7/8 5 5/8 6 1/4 6 7/8 7 1/2 8 1/8 9 3/8 10 5/8 1
6 1/4 6 7/8 7 1/2 8 1/8 4 3/4 10 11 1/4 1 1/4 7 1/2 8 1/8 8 3/4 9 3/8 10 11 1/4 12 1/2 Dimension in inches The minimum spacing outlined in the above chart applies to Hilti bolts detailed on separate adjacent fixtures.
Hilti bolts detailed on an individual fixture drawing =ay have less than the eini=u= spacing tabulated above. Such fixtures have been derated by eng:.neering Justification and are the resp:ssibility of the organization issuing the resppetive fixture drawing.
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TA3LE 7 MEASUREMINT TOLERANCES ATT AC.H M 6rdT B
s g. q.
a.
All dimensions shall have a field measurement tolerance as follows:
1.
23/4 in. For Dimension up to 5'-0 2.
21 in. For Dimension Greater than 5'-0 and less than or equal to 10'-0" 3.
ilh in. For Dimension Greater than 10'-0" 4.
Modified Structural Shapes, Field Cut Plates, E:c.:
11/8 in.
5.
Work Point il in.
6.
Cable Tray Hanger Elevation 22 in.
7.
Transverse Location of Cable Tray 12 in.
b.
Cable Tray span tolerance is 26 in.
c.
The End Distance Frem Centerline of the Bolt / Hole to the end of the Mer.ber Shall Have a Tolerance of 1 in.
d.
The Gage Distance Measure From the Centerline of the Bolt / Hole to the Heel of the Angle is th in.:
For Channels, the Tolerance is 11/8 in.
e.
A 21 in. Tolerance is Permissable in Locating:
Hilti to Another Hilti Hilti to Richmond Screw Anchor Richmond Screw Anchor to Anchor Screw Anchor f.
Field Measurement Toleranc( for Projection of Expansion
' Anchor 13/8 in., With minimur of Flush With Top of Nut.
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TABLE 8 A-T 7Act+ M E NT B
S4. i TOLERANCES FOR LOCATION & ELEVATION OF CTH's i
i Longitudinal Direction 6"
Transverse Direction
- 2" Perpendicular to Tray Elevation 2 2" 4
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e 41 1.
Sta= ped letters shall be on top (threaded) and of belt.
2.
Bolts of 19-inch length and greater may be stamped with nu:.ber corresponding to the bolt length in inches in the same manner instead of the stamped letters as listed above.
3.
Star stamp signifies Hilti super Ewik bolts.
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T gn ATTAC. RMEe4 T R s u.9.
BOLT DI M TER MINIM' E'SENT.NT MINDW TOCUE (Ft/Lbs)
Kwik-Bolts Super Kwik-Bolts 1/4 1 1/3 8
3/8 1 5/8 17 1/2 2 1/4 3 1/4 70 5/8 2 3/4 120 3/4 3 1/4 150 1
4 1/2 6 1/2 230 1 1/4 5 1/2 8 1/8 400 Note:
P.ilti Kdk Bolt and Seer Kwik Bolt mini::ut embedment is deten.ined as follows:
Step 1. Deter.ine mini:m.n length of bolt using the dimension in the "FDf' colum on Table II corresponding to the letter identification (or h$c erical Le.gth Identificatien as applicable).
Step 2. Subtract the total projection from the length deter =ine in Step 1.
Step 3. Tne resulting dimension from Step 2 plus one nut height ecuals embeinent length.
Step 4. Floor mounted supports in the area of 2" floor topping recuire the 2" to be subtracted fron the eiL+dr.er.t length determined in Step
- 3. This step is to be perfomed by ENY.
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ATTACHMENT 2 ATTENDANCE LIST T.F. Westerman NRC/RIV Terry Langowski NRC/TRT Jim Dale NRC R. Lipinski NRC/TRT E. Solla NRC/TES K. Bronson EBASCO Ron Muldoon EBASCO Robert C. Iotti EBASCO R.M. Kissinger TUGC0 R. Siever Bf,R C.R. Hooton TUGC0 R.E. Cag Impell W.F. Rockwell EBASCO 4
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