ML20211H073
| ML20211H073 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 06/18/1986 |
| From: | Landers D TELEDYNE ENGINEERING SERVICES |
| To: | Noonan V NRC - COMANCHE PEAK PROJECT (TECHNICAL REVIEW TEAM) |
| Shared Package | |
| ML20209E570 | List:
|
| References | |
| FOIA-86-657 6410-64, NUDOCS 8606230101 | |
| Download: ML20211H073 (4) | |
Text
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Mr. V. Noonaq, Project Director Comarche Peak Project United States Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Division of Licensing Mail Stop P-234 Washington, D. C., 20555 SU3 JECT: 'TES Memorandum related to Review of Safety Significant Evaluations
Dear Mr. Noonan,
Atached please find the subject memorandum.
Based on current contractual requirements, it is recognized that the " Tentative Schedule" on p.tge 3 will not be appropriate.
If you have any questions please contact me or Mr. James Rivard.
Very truly yours, TELEDYNE ENGINEERING SERVICES
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Donald F.' Landers Executive Vice President s
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S.Bajwa(NRC)
I. Barnes (Region IV)
J. Rivard (TES)
J. Cragin (TES) 6410 File fc3A-%-6S7 B/y r
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,.D MM MEMORANDUM ENGSEERNG SERVICES T0:
D. F. Landers FROM:
J. J. Rivard 8
DATE:
June 18, 1986
SUBJECT:
Project 6410 - Comanche Peak Civil / Structural Review Programs Review of Appendix P, Civil / Structural Issues Review of Safety Significance of Construction Deviations (ISAP VII.c)
REF:
TES Letter 6410-42, dated January 31, 1986 to Mr. Charles Tramell of NRC Review of Safety Significance of Construction Deviations The following is a sumary of the review of the Safety-Significant Evaluations of the Construction Deviations in the Civil / Structural Popula-j tions.
There are a total of fifteen populations in the C/S area.
This l
effort involves the review of eleven populations, including:
Concrete (CONC)
Structural Steel (STEL)
Fill and Backfill (FILL)
Liners (LINR)
Fuel Pool Liner (FPLR)
Instrument Pipe / Tube Supports (INSP)
HVAC Supports (HVDS)
Category I Conduit Supports (C0SP)
Equipment Supports (EQSP)
Cement Grout (GRTC)
Epoxy Grout (CRTE)
Excluded are the populations related to piping:
Large-Bore Pipe Supports - Rigid large-Bore Pipe Supports - Nonrigid Small-Bore Pipe Supports Pipe Whip Restraints These areas are being reviewed by R. D. Hookway of Teledyne.
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yM ENGEEERNG SERVICES T0:
D. F. Landers June 18, 1986 Page 2 On January 31, 1986, a proposed audit plan was submittd to Charles Trannell (TES Letter 6410-42).
The following is a sumnary of this audit plan for the SSE's:
1.
Review methodology and procedures.
2.
Audit evaluations.
3.
Audit sample expansions (if any).
During the week of April 28, 1986, TES began to audit the Civil / Structural SSE's. The audit consisted of a revew of methodology and procedures as well as audits of specific SSE's.
Population
- SSE's Reviewed CONC 10 STEL 4
LINR 3
FPLR 3
HVDS 6
INSP 1
COSP 6
EQSP J
TOTAL 36 l
This audit was performed under the direction of Region IV (Ian l
Barnes), and the audit report is to be issued by the Region. The present l
intent is to review 10 percent of the SSE's. Since there are approximately
.1,500 SSE's in the eleven C/S Populations, excluding the Piping Populations, 150 SSE's will be reviewed, of which 36 have been reviewed.
l At the time of the !:revious audit, the only deviations determined to be safety significant, therefore resulting in sample expansion,'were found with pipe-support locking devices (missing cotter pins).
Concerns as a result of the initial audit of the Civil / Structural SSE's.
f (1) Concrete - Cast-in-place anchor bolts were installed out of tolerance.
The evaluation states that the analysis of the anchor bolts and attachment uses the as-installed locations.
l This should be verified by a review of project procedures and l
i specific calculations.
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TM ENGNEERNG SEEES T0:
D. F. Landers June 18, 1986 Page 3 (2) Similar deviations identified in a number of the populations, including weld deficiencies, support locations, brace configura-tions, may be safety significant if occurring at 'other locations. The adverse trending should be reviewed to determine how this will be addressed.
(3) Equipment Supports - The torque of Unistrut bolts holding an Electric Control Box was determined to be 100 in-lbs instead of 228 in-lbs as required by the installation procedure.
The evaluation demonstrated that 100 in-lbs were adequate to support the control box.
However, during the reinspection of the torque, it was noted that the mounting lugs began to bend at 100 in-lbs. The concern is that, if in fact 228 in-lbs was used at similar applications, the control box may be damaged.;. This attribute should be reviewed in the Elec. Equipment Population.
This may be significant.
The continuation of the SSE reviews will continue some; timeeafter July 7,1986. In addition to the review outlined in the referenced letter,.
I recommend that the adverse trending, along with areas listed above,,
specifically design procedures and calculations for cast-in-place; anchor.r bolts and installation procedures for electrical equipment supports,.ba:.
reviewed to complete the audit of the Civil / Structural SSE's.
Resolution of APPENDIX P, Civil / Structural Issues Based on discussions with ERC, the Draft Report will be complete:
August 1, 1986. TES suggests an audit at the site shortly after that;and one additional audit of the Final Report.
Tentative Schedule for SSE and APPENDIX P Issues (Two people for each audit)
SSE one week in July (SSEReview) one week in August (SSE and Trending).
one week in October (Final) l l
Appendix P one week in August (After Draft Report) one week in November (Final) l l
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