ML20141K126

Trip Rept of 850829-30 Visit W/Util & Teledyne at S&W Ofcs in New York,Ny Re Status of S&W Effort Concerning Design Adequacy Program for Plant Piping & Pipe Supports.Lists of Attendees,Agenda & Util Action Plan Encl

ML20141K126
Person / Time
Site:	Comanche Peak
Issue date:	09/10/1985
From:	Shao L NRC - COMANCHE PEAK PROJECT (TECHNICAL REVIEW TEAM)
To:	Noonan V NRC - COMANCHE PEAK PROJECT (TECHNICAL REVIEW TEAM)
Shared Package
ML20141K130	List: ML20141K126 ML20141K139
References
NUDOCS 8601220256
Download: ML20141K126 (6)

Text

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MEMORANDUM FOR: Vincent Noonan, Director Comanche Peak Project _

FROM: Larry Shao, Manager, Engineering Group Comanche Peak Project

SUBJECT:

TRIP REPORT SUmARY FOR COMANCHE PEAK DESIGN ADEQUACY PROGRAM AUDIT On August 29-30, 1985, the staff and its consultant from Teledyne met with the applicant (TUGCO) and its representatives at the offices of Stone & Webster A list of the meeting Engineering Corporation (SWlC) in New York, NY.

participants is attached to this memorandum (Attachments 1 and 2). The purpose of the meeting was to discuss the status of the SWEC effort related to the.

design adequacy program for CPSES piping and pipe supports. The meeting agenda is attached to this memorandum in Attachment 3.

Pro. ject Action Plan '

The meeting began with a general discussion of the SWEC action plan developed to address the technical concerns related to piping and pipe support design.

SWEC discussed its pipe stress and pipe support qualification action plan (Attachment 4).

SWEC clarified the approach to be used for requalification and reanalysis of large bore piping supports. SWEC stated that all ASME Class 1, 2 and 31arge bore support designs will be reviewed. Depending on the results of the review, the existing support calculation will either be requalified to the new piping analysis loads on a load comparison basis or a new pipe support calculation will be generated. Small bore piping and supports will be requali-fled on a sampling basis. Details of the sampling process are under preparation.

The SWEC effort will be primarily based out of the New York offices although many of the other SWEC offices will be involved.

The SWEC effort includes piping and supports for both Unit 1 and Unit 2.

Although the design approach for the piping and supports in both Units 1 and 2 will be treated the same, the Unit 1 modification;, will be performed to ASME Section XI whereas the Unit 2 modifications will be performed to ASME Section III.

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SEP 101965 Vincent Noonan Project Technical Interfaces

' SWEC provided a chart depicting Thethe technical CPRT interfaces has the overallwith the SWEC for responsibility organization (Attachment 5).

identifying and tracking the design concerns related to piping and pipe supports. The CPRT is currently developing a computer program to track all the This program will be based in the TERA offices in issues andMaryland.

Bethesda, their resolution.SWEC is also reviewing transcripts, sunnery disposition i

motions, and previous reports related to the piping and pipe support design in order to fully understand the concerns and ensure that these concerns are

technically being addressed. Additionally, R. L. Cloud Associates are assisting TUGC0 in a technical overview of the SWEC work.

Project Organization The chart depicts i

In Attachment 6, the SWEC organizational structure is shown.

A different group of SWEC mainly the details of the production effort.

engineers is also being fonned to develop the technical resolutions to specific design concerns which cannot be covered under the production effort.

Walkdown Results SWEC has recently completed an as-built verification walkdown of large bore piping systems. The procedure used was provided in Project Procedure CPPP-5.

The walkdown was performed to detennine the accuracy of the dimensions and functions shown on the as-built drawings. The staff requested that SWEC review the Comanche Peak SSER fil in order for SWEC to be aware of the s findings and how they might impact their scope of work for walkdowns.

l Procedures The applicant discussed the status of Project Procedures CPPP-5, CPPPP-6, When and l Only CPPP-5 has been approved and finalized at this time.

l CPPP-7.

l project procedures CPPP-1 through CPPP-10 are finalized, they will be fonnally submitted to the NRC and all parties.

l Technical Issues The esolu'h af specific technical issues is being conducted by the SWEC At this time, SWEC is reviewing past studies, organizatiori an Cherry Hill, NJ.

analyses, and reports on certain technical issues in addition to the transcripts SWEC has and legal filings in order to understand the concerns of all parties.

developed an initial approach for the resolution of some of the piping and pipe The discussion support concerns and discussed the viability of their approach. fol cinched U-bolts, and stability. The staff stated that detailed discussions of l the resolution of these technical issues will be necessary in subsequent cmetings.

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Vincent Noonan SEP 10 985 Conclusions The meeting concluded with SWEC discussing the near tem efforts to be accomplished. The piping stress analyses will commence in Septeeber and is anticipated to be in full production swing by the beginning of October 1985.

Additional field walkdowns are also planned in September for 1) small bore piping and supports and 2) reverification of the orientation of snubbers, struts and valves. The staff requested that TUGC0 advise the staff of the walkdown schedule in order to allow the staff the opportunity to participate.

The applicant agreed to notify the staff prior to the walkdowns.

m Larry Shao, Manager Engineering Group d

Ccmanche Peak Project Attachments: As stated cc: D. Eisenhut, NRR l

l R. Bosnak DE C. Tramell, DL S. Hou, TRT D. Norkin, IE R. Masterson, EAS V. Ferrini, EAS D. Landers, TES R. Hookway. TES D. Terao, DE l

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MEETING AGENDA

1. WELCOME E. SISKIN L. SMAD

, 2. MEETING OBJECTIVE

3. STONE & WEBSTER PROGRAM e ACTION PLAN e PROJECT TECHNICAL INTERFACES e PROJECT ORGANIZATION e WALKDOWN RESULTS e PROCEDURES I 4. TECHNICAL ISSUES e GENERAL e CENERIC STIFFNESS e RICHMOND INSERTS e FLUID TRANSIENTS e CINCHED U-BOLTS

5.

SUMMARY

NRC i

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