ML20137G760
| ML20137G760 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 12/27/1985 |
| From: | Landers D TELEDYNE ENGINEERING SERVICES |
| To: | Noonan V NRC - COMANCHE PEAK PROJECT (TECHNICAL REVIEW TEAM) |
| Shared Package | |
| ML20137G766 | List: |
| References | |
| 6410-33, NUDOCS 8601210203 | |
| Download: ML20137G760 (10) | |
Text
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W TELEDYNE ENGINEERING SERVICES 130 SECOND AVENUE WALTHAM MASSACHUSETTS 02254 (617) 890-3350 TWX (710) 324-7508 December 27, 1985 6410-33 Mr. Vince Noonan, Project Director 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 Reports for our visit to the Comanche Peak Site on November 13-14 and November 20-22, 1985.
Also attached is our preliminary Trip Report for our visit to Stone & Webster at the New York Office on December 6, 1985.
If you have any questions please do not hesitate to contact me.
Very truly yours, TELEDYNE ENGINEERING SERVICES CL/
M Donald F. Landers Executive Vice President DFL/1h Attachments (Trip Report Nos. 2186a, 2187a, 2190a) cc:
L. Shao (USNRC)
D. Terao (USNRC)
C. Trammell (USNRC)
C. Poslusny (USRNC) 6410 File (TES) 45 PDR ENGINEEilS AND METALLURGISTS J
SPTFiFnYNE ENGINEERING SERVICES DRAFT TRIP REPORT NO. 2186a ROBERT D. H00KWAY VISIT TO COMANCHE PEAK SITE NOVEMBER 13-14, 1985 Attendees:
Robert D. Hookway (TES)
Dave Terao (NRC)
Purpose:
The purpose of this site visit was to gain an understanding of the QA/QC Construction Adequacy Sampling and walkdown results in the piping and pipe support areas.
This understanding is required to assure proper integration of this data with other SWEC and TUGC0 walkdown efforts to verify the adequacy of the as-built drawings.
These as-built drawings are being used by SWEC for the piping and pipe supports requalification effort.
At the site we met with ERC personnel to discuss our purpose and to look at the samples, the walkdown data and the evaluation of the data.
Personnel present included:
Name Company R. Terao NRC R. Hookway TES/NRC Joe DiMare ERC John Schauf ERC T. Westerman NRC/RIV R.S. Tate ERC M. Iannucci ERC We reviewed the procedures used to define the populations and the procedures describing the walkdown and the evaluation.
The procedures are listed in Attachment I.
The samples and the deviation reports (DRs) associated with them were randomly reviewed. There is a large number of DRs for each sample.
All of these DRs have been written off by various methods. These methods include:
"RTA prT(NE ENGINEERING SERVICES Trip Report No. 2186a (continued) 1.
Use of dispositions on previous NCRs (note that most of these dispositions were based on analyses performed by G&H).
The con-cern here is that the disposition may be different if the SWEC reanalysis were used.
2.
The Safety Significance Evaluation Group (SSEG) evaluates each deviation other than those from (1) above to determine its safety significance.
From our discussions it appears that " safety sig-nificance is determined by the functionality of the sample."
That is, will the sample still perform its intended function with the deviation. Two examples follow:
1.
If a deadweight support (spring hanger) were inoperable, it could be deemed non safety significant by the SSEG by showing no significant increase in pipe stress on the sample (piping configuration for example) as a result.
If, however, the same inoperable spring was found in the non-rigid pipe support population, it would be deemed safety significant because the sample (non-rigid support) would not function as it was intended.
II.
In the piping configuration sampl e, a valve was found installed backwards.
This deviation again was deemed non safety significant since the piping system (sample) would still perform its intended function.
If there were a valve population, this same deviation would most likely be safety significant.
The concern in this case is that the safety significance evaluation may have no bearing on safety of the plant.
We looked at portions of the piping configuration and pipe support samples.
'RTA prh'NE ENGNEERING SERVICES Trip Report No. 2186a (continued)
Bore Piping Configuration Sample Coment 1-M-SBC0-010
-011
-012 two DRs (dimensions & interferences)
-023 one DR (interference).
Originally there were two, but one was written off by the disposition on a prior NCR (#M-10233 dated September 83).
-035 two DRs (location & clearance)
-062 one Dr (valve location)
-014
-021
-025
-026
-036
-037
-038
-039
-044
-046
-051 Large Bore Piping Configuration Looked at 10 packages from large bore piping configuration (10 selected with DRs).
I-M-LBC0-002
-003
-011
-014
-018
-019
-025
-026
-033
-034
r WTFI m(NE ENGINEERING SERVICES Trip Report No. 2186a (continued)
Sample Coment I-M-LBC0-002 one DR with (4) clearance problems
- noted, one of the clearance problems written off by previous NCR disposition based on "old" stress analysis.
-019 invalid sample - replaced with another.
-025 one DR - interference
-026 one DR interference
-033 two DRs/DR-1, plate installed opposite to proper direction.
DR-2, code data tag missing from valve.
This DR written off by inspection supervisor, interference noted at weld penetration (rubber sealant) but not noted by report as a DR.
-034 1 DR - clearance problems - one of them written off by previous NCR.
Disposition based on prior stress analysis.
Pipe Supports Population The pipe supports populations include:
o Large Bore Pipe Supports - rigid o
Large Bore Pipe Supports - non rigid o
Small Bore Pipe Supports (includes both rigid and non rigid) o Pipe Whip Restraints Large Bore Rigid Sample looked at in 1-S-LBSR-006 (SN W/U-Bolt Att.)
-016
-019
-029
-033
-034
-037
-040
-050
-056
~
'RTFIFD(NE ENGINEERING SERVICES Trip Report No. 2186a (continued)
Sample Comment 1-S-LBSR-006 (strut w/U-bolt attachment to pipe) 2DRs 1 - U-bolt clearance in "0"
- this was deemed a non DR by an ERC (memo re U-bolt gaps, etc.) looks Ok.
2 Sway strut extension size and "A"
dim outside tolerances
-016 (box frame) 1 DR nut loose at base plate note:
data package has no info so that items such as gaps can be checked to assure compliance with QI procedures all it has is indication of or not.
-029 (strut) 2 DRs dealing with locking devices and nuts note:
procedures have nothing in them to check support function.
-029 (rigid strut) 1 OR pin to pin dimension outside drawing tolerances of 1/4" it is actually 3/8".
-033 (box frame w/ shims) 1 DR weld 7/8" long - should be 1" Large Bore - non rigid supports I-S-LBSN-001
-005
-015
-023
-024
-041
-047
-048
-057
-061
'RTm Fr#NE ENGINEERING SERVICES Trip Report No. 2186a (continued)
Sample Coment I-S-LBSN-041 double snubber on riser (w/ riser clamp attachment & lugs 9 Drs DR1 material incorrect DR2 component member lengths out of tolerances DR3 Hiltis too close to a Richmond insert DR4 pipe clamp halves slightly out of parallel DR5 lug locations out of tolerance DR6 undersized fillet welds (5/16" instead of 3/8")
DR7 Hilti embedment out of spec.
DR8 undersized fillets on lup 3/;6" instead of 1/4" for part of lengtr.
DR9 no welds on lug
-047 axial (E-W double snubber connected by stanchions 7 DRs DR1 welder ID symbol undistinguishable DR2 no support I.D. no on stanchion DR3 support location off by l'-0" DR4 installation detail dimension out of spec.
DRS no locking devices on clamps DR6 pipe clamp header out of parallel DR7 gap at spherical bearing out of spec.
-048 lat. snubber (2 of the ' attached to beam which attaches in turn into stanchion to pad in pipe.
5 DRs DR1 rear bracket dimension out of spec.
DR2 gap at upper bracket out of spec.
DR3 no lock-wire on snubber - this DR invalidated by ERC memo "no lock was req'd".
DR4 spherical bearings painted DR5 weld size out of spec.
This DR in-validated - weld remeasured.
j
r SPTA m(NE ENGINEERING SERVICES Trip Report No. 2186a (continued)
Sample Comment I-S-LBSN-057 (spring hanger) 5 DRs DR1 no locking devices on threaded fast-eners DR2 Hilti embedment length not suffic-ient DR3 travel stop not installed on spring can DR4 thread engagement not accessible DRS cold setting on spring not correct
-061 (snubber attached 5 DRs by clamp)
DR1 improper mark no.
DR2 no locking devices DR3 pipe clamp halves out of parallel DR4 pipe clamp spherical spacers out of tolerance.
ERC memo changed disposition due to revised criteria.
DR5 spherical bearing painted.
Small Bore Piping Supports Population (includes both rigid and non rigid)
I-S-SPPS-011
-014
-018
-033
-034
-038
-040
-266
-270
-054 Sample Comment I-S-SBPS-038 (box frame) back to small bore look only at DR and list only those im-portant DR1 bolt in base plate mislocated note:
support function looks question-able no time now to pursue.
-040 (box frame) 1 DR weld specified on drawing cannot be made.
r
- ' F W NE ENGINEERING SERVICES Trip Report No. 2186a (continued)
Sample Comnent I-S-SBPS-266 (box frame)
I base plate bolt hole location out of tolerance 2
installation not in accord with drawing - written off by ERC - looks Ok 3 weld not in accord with drawing
-270 (box frame) 2 DRs 1 gaps not within tolerances 2 embedment questionable
-054 (spring hanger) 2 DRs 1 lock not secure 2 no lock nut or bolt through welded beam Exit Meeting 2:30 P.M.
7 Areas of Concern Noted 1.
penetration clearances, etc.
2.
safety significant evaluation definition, etc.
3.
use of old analyses for DR and S.S. and former NCRs dispositions.
4.
interface between support C/S population (e.g., Hilti on bottom of concrete beams - load at Hilti bolt and concrete population).
5.
Re large bore rigid supports box frame supports gaps (e.g., box frames on strut that require a gap!!!).
6.
definition of population - we will look at remainder of popu-lation!!
next week 7.
small bore support function RobertD.Hookg RDH:sig Attachment u
'A'F WNE ENGINEERING SERVICES Trip Report No. 2186a (continued)
ATTACHMENT I Population Inspection /
Document Description Reinspection Review Pipe Supports large bore-rigid QI-027-1 QI-028-0 large bore-non rigid QI-029-1 QI-030-0 small bore-rigid /
small bore-non rigid QI-019-2 QI-020-0 Piping small bore piping config.
QI-026-0 Not Ready large bore piping config.
QI-025-1 Not Ready bolted joints QI-021-1 QI-022-0 piping welds (stick)
QI-049-0 Not Ready piping welds (gas)
QI-047-0
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