ML20113D264
| ML20113D264 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 01/18/1985 |
| From: | Williams N CYGNA ENERGY SERVICES |
| To: | Noonan V NRC |
| References | |
| 84042.02, 84042.022, NUDOCS 8501230032 | |
| Download: ML20113D264 (11) | |
Text
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a unvxrs 101 California Street, Suite 1000, San Francisco, CA 94111-5894 415/397-5600 January 18, 1985 84042.022 Mr. Vince Noonan U.S. Nuclear Regulatory Commission 7920 Norfolk Avenue Bethesda, Maryland 20814
Subject:
Open Items Associated with Walsh/Doyle Allegations Texas Utilities Generating Company Comanche Peak Steam Electric Station Independent Assessment Program, Phase 3 Job No. 84042
Dear Mr. Noonan:
As discussed during our meeting with the NRC staff on January 10, 1985, Cygna has assembled the attached list of open items associated with the Walsh/Doyle allegations and Cygna's Phase 1, 2 and 3 reviews.
In addition, item 26 of the attached list has been added even though it was identified as a result of the Phase 4 mechanical systems review. Since it is concerned with piping classifi-cation, we thought it may relate in some way to the scope of your SSER.
Also attached is a schedule which graphically depicts the estimated response dates. Please note that the dates reflect milestones known to Cygna at this time and not necessarily item closeout. For example, one item entitled:
" sizing of pipe support hardware for rotational restraints," has a January 21, 1985 scheduled comitment from TUGC0 to supply Cygna with an evaluation of the problem. Cygna must then review the response which typically takes several weeks. Certain activity completion dates could be revised if the NRC staff indicates a preference to have specific items closed out prior to the scheduled dates shown.
We are currently in the process of reviewing the basis for closure of Phase 1, 2 and 3 items as well as the overall conclusions.
In doing this, Cygna will be evaluating all discrepancies and observations together rather than solely within a given phase. We believe this is a necessary and important effort since review results from later phases are clearly impacting the basis for resolution of pro-blems encountered in previous phases. A summary of conclusions which are under review and which will possibly be revised as a result of this effort will be sent to you by January 25, 1985.
8501230032 850118 T4' PDR ADOCK 05000445 J
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Mr. Vince Noonan January 18, 1985 Page 2
'If you have any questions or wish to discuss any of this information, please do not hesitate to call.
Very truly yours, h
W%
N.H. Williams Project Manager NHW/ajb Enclosures cc: Mrs. J. Ellis Mr. S. Treby Mr. S. Burwell Mr. J.B. George Mr. D. Wade Mr. D. Pigott Mr. N. Reynolds
PHASED 1,2 AND 3 OPEN ITEMS LIST ESTIMATED SESCItIPIION CVGN4 CROSS-REFERENCE STATUS RESPONSE DATE 1.
Ci nching of U-bolts.
IAP, Phases 1 and 2 Final Re-Cygna is currently reviewing Cygna letter to TUGC0 port, TR-83090-01, Rev. O.
TUGC0 response to Cygna ques-scheduled for 2/8/85.
Pipe Support Checklist General tions (TUGC0 letter dated Note 1.
11/1/84). Based on a prelimi-nary assessment of TUGC0's re-sponses, it appears additional information ney be required.
In particular, no information has been supplied explaining how TUGC0 will extrapolate the analysis / test results to other pipe sizes and schedules.
In addition, Cygna is evaluating the acceptability of cen-troidal stress information for the finite element mesh uti-lized by Westinghouse.
2.
Pipe support stability.
IAP, Phases 1 and 2 Final Re-Cygna is currently evaluating Cygna letter to TUGC0 port TR-83090-01, Rev. O.
the pipe supports from all summarizing the results Pipe Support Checklist General phases to complete our as-of the review is sche-Note 1.
sessment of pipe support duled for 2/4/85 I
stability. This issue is tied i
IAP, Phase 3 Final Report TR-to Cygna's completion of the i
84042-01, Rev. 1.
Pipe Sup-U-bolt cinching reviews.
port Checklist General Notes 10, 12 a nd 16.
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3 Sizing of pipe support IAP, Phase 3 Final Report.
TUGC0 performing analyses in TUGC0 scheduled response j
hardware for rotational TR-84042-01, Rev.1.
response to Cygna Phase 3 by 1/21/85. Cygna 's re-i restrai nts.
(bservation PS-03.
view will be scheduled i
subsequent to receipt of TUGC0 analyses.
4
! 1 i
PHASES 1,2 AND 3 OPEN ITEMS LIST (CONTINUED)
ESTIMATED DESCRIPTIGH CMiNR CROSS-REFERENCE STATUS RESPONSE DATE 4
Punching effects in tihe IAP Phase 4 review open item.
Cygna reviewing TUGC0 response Letter to TUGC0 summa-steel around b01t holes.
to Cygna questions on the rizing Cygna concerns (See Figure 1.)
local effect in the tubesteel scheduled for 1/25/85.
wall (TUGC0 letter dated 11/8/84).
5 Cumulative effects of IAP, Phases 1 and 2 Final Re-Cygna believes it is necessary Sumary conclusions for individually insigni fi-port, TR-83090-01, Rev. O, to assess cumulative effects all phases will be pro-cant discrepancies.
"Methodol ogy."
across all phases rather than vided in the Phase 4 only within a given phase.
report. Cygna letter to IAP, Phase 3 Final Report, Cygna is voiding selected, the NRC stating which TR-84042-01, Rev.1, " Method-previously documented conclu-conclusions are now open ol ogy."
sions (Phase 1, 2 and 3) since and which are now closed information obtained in later is scheduled for 1/25/85.
Transcript of January 10, 1985 phases affects the basis for Cyg na/NRC meeti ng.
resolution of previously closed items.
6 Corrective action pro-IAP, Phases 3 Final Report, The Phase 3 Quality Assurance Phase 4 report comple-gram.
T R-84042-01, Rev. i Section reviews established that ade-tion date ticd to clo-5.3.
quate corrective action sys-sure of all open items.
tems were in place. Cyg na is reassessing these conclusions i
based on findings from all phases of the technical revi ews.
7.
Design veri fication.
IAP Phase 4 review scope.
Part of the Phase 4 review Phase 4 report comple-scope.
tion date tied to clo-sure of all open items.
PHASED 1,2 AND 3 OPEN ITEM 3 LIST (CONTINUED)
ESTIMATED DESCRIPTION CVGNA CROSS-REFERENCE STATUS RESPONSE DATE 8.
Dynamic amplification IAP, Phase 2 Final Report, TR-Part of the Phase 4 review Phase 4 report comple-factor for cable tray and 83090-01, Rev. O, "Concl u-scope.
tion tied to closure of conduit support design.
si ons."
open items.
IAP Phase 4 review scope.
9 Governing load case and IAP Phase 4 review scope.
Part of the Phase 4 review Phase 4 report comple-its effect on allowable scope.
tion date tied to clo-stresses for cable tray sure of all open items.
support design.
10 Accuracy of as-built IAP Phase 4 review scope.
Part of the Phase 4 wal kdown.
Phase 4 report comple-drawi ngs.
tion date tied to clo-sure of all open items.
- 11. Box frames with 0" gap.
Prefiled Testimony of Nancy H.
Cygna has additional questions Cygna letter to TUGC0 Williams dated April 12, 1984.
concerning TUGCO's choice of summarizing Cygna con-Doyle question 15.
formulae for calculating pipe cerns scheduled for sti f fness.
1/25/85.
IAP, Phases 1 and 2 Final Report, TR-83090-01, Rev. O.
Pipe Support Checklist General Note 4.
IAP, Phase 3 Final Report, TR-84042-01, Rev.1.
12 Richmond insert al-IAP, Phase 3 Final Report, TR-Cygna has reviewed the TUGC0 Cygna letter to TUGC0 lowables and bending 84042-01, Rev. 1.
Pipe Sup-affidavit on Richmond inserts summarizing Cygna con-l stresses.
port Checklist General Note 6.
agai n and has further ques-cerns scheduled for j
ti ons.
1/28/85.
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7 PHASE 31,2 AND 3 OPEN ITEMS UST (CONTINUED)
ESTIMATED KSCRIPTION CVGNA CROSS-REFERENCE STATUS RESPONSE DATE 13 Inclusion of pipe support IAP, Phases 1 and 2 Final Re-A conclusive study of this ef-N/A mass in stress analysis.
port TR-83090-01, Rev. O.
fect would be lengthy and is Pipe Stress Checklist General not authorized.
Note 1.
- 14. Pipe support sel f-weight IAP, Phase 1 and 2 Final Re-This issue is under review by N/A cxcitation.
port, TR-83090-01, Rev. O.
the NRC staff. No further General notes attached to Cygna review is planned or individual pipe support authorized at this time.
checkli sts.
IAP, Phase 3 Final Report, TR-84042-01, Rev.1. Pipe Support Checklists General
, Note 7.
Meeting transcript between NRC and Cygna, July 3,1984.
15 Pipe support stiffness IAP, Phases 1 and 2 Final Re-This issue is under review by N/A used in stress analyses, port TR-83090-01, Rev. O.
the NRC staff. No further General notes attached to Cygna review is planned or individual pipe support authorized at this time.
checkli sts.
IAP, Phase 3 Final Report, TR-84042-01, Rev. 1.
Pipe Support Checklist General Note 8.
Meeting transcript between NRC and Cygna, July 3,1984.
PHASEJ 1,2 AND 3 OPEN ITEMS LIST (CONTINUED)
ESTIETED DESCRIMION CIGE CROSS-REFERENCE STATUS RESPONSE ORTE 16 Mass participation / mass IAP, Phase 3 Final Report, TR-TUGC0 has performed reanalyses Cygna letter to TUGC0 is point spacing.
84042-01, Rev. 1.
On the pipe stress problems scheduled for one week Observations PI-00-US and and pipe support designs as after receipt of addi-PI- 09-01.
documented in their 12/7/84 tional information from i
letter to Cygna. Cygna has
' Gibbs & Hill.
checked a sample of the rean-alyses and has questions on the TUGC0 conclusions partic-ularly with regard to pipe support checks for adequacy.
Cygna has also requested ad-ditional information from Gibbs & Hill per 1/14/85 tele-l con between L. Weingart and H.
i Mentel.
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17 Main steam " stability IAP, Phase 3 Final Report, TR-Closed from a pipe stress Same as item 16 above.
bumpers".
84042-01, Rev. 1.
(bservation standpoi nt. Open from a sup-l PS-02.
port standpoint since the re-l view of these supports was l
part of item 16 above.
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18 Rear bracket dimensions.
IAP, Phase 3 Final Report. TR-Closed by Phase 4 walkdown.
N/A 84042-01, Rev. 1.
Pipe Sup-i port Checklists General Note l
11.
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N/A CC-1-009-007-A33R.
84042-01, Rev. 1.
Pipe Sup-port Checklist PS-004.
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PHASES 1,2 AND 3 OPEN ITEMS LGT (CONTINUED)
ESTIMATED BESCRIPTION CYGNA CROSS-REFERENCE STATUS RESPONSE DATE 20 Pin-to-pin dimension on IAP, Phase 3 Final Report, TR-Closed by Phase 4 walkdowns.
N/A support CC-1-028-033-533K.
84042-01, Rev. 1.
Pipe Sup-port Checklist PS-026.
21 Bolting on support IAP, Phase 3 Final Report, TR-Closed by Phase 4 walkdown.
N/A MS-1-001-002-S/2R.
84042-01, Rev. 1.
Pipe Sup-port Checklist PS-068.
22 Qualification of welds in IAP, Phase 3 Final Report, TR-Cygna has reviewed the Phase 2 Cygna letter to TUGC0 welded / bolted connec-84042-01, Rev. 1.
Pipe Sup-supports and found another addressi ng Cygna con-ti ons.
port tbservation PS-06.
example of this type of con-cerns is scheduled for necti on.
1/28/85
~
23 Verification of cable Telecon attached to Cygna Cygna has addressed this as Cygna letter to NRC tray installation against letter 83090.021 to S. Bur-part of the Phase 4 scope and scheduled for 2/11/85.
latest drawing.
well, item 1.
will issue a letter to the NRC before issuing the Phase 4 report.
24 Verification of cable Telecon attached to Cygna Cygna has addressed this as Cygna letter to NRC tray construction draw-letter 83090.021 to S. Bur-part of the Phase 4 scope and scheduled for 2/11/85.
ings against design well, item 5.
will issue a letter to the NRC drawi ng s.
before issuing the Phase 4 report.
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25 Adequacy of the iterative Phase 4 design verification Cygna has addressed this as Cygna letter to NRC design process.
reviews, transcript of 1/10/85 part of the Phase 4 scope and scheduled for 3/11/85.
Cygna/NRC meeting.
will issue a letter to the NRC before issuing the Phase 4 l
report.
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PHASES 1,2 AND 3 OPEN ITEMS UST (CONTINUED)
ESTIMATED RESCRIPfl0N CVGNA CADSS-EFEENCE STATUS ESPONSE DATE
- 26. Effect of consafety re-Cygna letter 84055.10 dated Cygna has addressed and closed N/A lated seismic Category II 7/30/84, question 3.
this issue for the Component piping on safety related Cooling Water System as part piping (CPSES FSAR Sec-Cygna letter 84056.023 dated of the Phase 4 review scope.
tion 3.2, s@ paragraph 3 8/21/84, question 2.
Review of generic implications "Other Classifications.")
for other piping systems is TUGC0 letter to Cygna dated not authorized at this time.
8/11/84 TUGC0 letter to Cygna dated 9/11/84 TUGC0 letter to Cygna dated 9/25/84 Cygna Phase 4 (bservation
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MS-02-01.
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FIGURE 1 PUNCHING EFFECTS IN TUBE STEEL (example) 23/4"O BOLT HEAVY HEX NUT E
3/4 i
(
h 8 x 12 x 1/2 T.S.
O N
P I
OPEN ITEMS SCHEDULE ummmmmmmme (RESPONSE DATES) wra ACTIVITT EsteE: 01/18 8t/25 82/01 GE/SB 02/15 3E/22 03/01 03/08 83/15 83/22 83/29 04/05 94/12 94/19 94/2e 05/03
- 1. 51atng of ptpe support i
heresere for rotattenal restra1ats.
2.
Peaching effects la tee steel aromad belt holes.
3 i
(see risure 1.)
l 3 Boa frames with U* gap.
3 l
4 etcheems tasert alleusbles g
j ans heading stresses.
i 5.
mass participettem/ mess 3
potat spectng.
6 pipe surport stellity.*.
-3 7 Clachtng of 94e1ts.
O i
5 t>self ficatten of melds in I
welded /boltes ceanec-
-3 tises.
9.
Vertficatten of aseutlt j
cale tray hardmere
_3 1
agatest design drawing, j
- 18. Vefication of cale tray construction drawings 3
l against destyn drawings.
- 11. Adegsacy of the itergttve 3
design process.
- 12. Phase 4 revleu/opea *.
1 tems.
3
- 13. Cuestative effects of W y
et etdisally insigntf tcant c'
eiseropeactes.
I 14 Carrective action program.
0 1
- 15. Design vertftratten.
16 phese 4 F1nel mopert.
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