ML20027C359

Summary of 820928-30 Meeting & Site Visit W/Util & Bechtel Re Masonry Wall Design.Addl Info Requested Re in-plane Response Effects on out-of-plane Responses & Documentation of Verification of Programs

ML20027C359
Person / Time
Site:	Trojan File:Portland General Electric icon.png
Issue date:	10/05/1982
From:	Trammell C Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
IEB-80-11, TAC-12369, NUDOCS 8210150354
Download: ML20027C359 (5)

Text

r

~

L x.

T b M -C/h OCT 5 1982 Docket No. 50-344 FACILITY: Trojan Nuclear Plant LICENSEE: Portland General Electric Company (PGE)

SUBJECT:

SUMMRY OF SITE VISIT AND MEETING RE: fMSONRY WALL DESIGN, SEPTEMBER 28-30, 1982 On September 28, 1982, D. Jeng. H. Chokshi and C. Trammell of the NRC staff visited the Trojan site for a walkdown of masonry wall construction and improvements made both as a result of the Control Building proceeding (seismic improvements to shear walls) and revised criteria resulting fromLER79-15(out-of-planeimprovements).

On September 29 and 30, 1982, the NRC staff met with representatives of PGE and Bechtel Power Corporation at the Bechtel offices in San Francisco for a two-day technical meeting on masonry wall design.

The basis document for the discussion was PGE's letter of October 23, 1980, which set forth evaluation criteria for all types of masonry walls (single and double wythe and composite) for consideration of both in-plane and out-of-plane loads. Tornado loads were also discussed.

On May 8, 1982, the NRC staff requested additional information concerning the PGE 10-23-80 letter. PGE's responses dated 6-19-81 and 6-24-82 were also discussed.

Attendees are listed in the Attachment.

The meeting resulted in six action items, also litted in the Attachment.

In a telephone call following the meeting. PGE stated that they would respond to all action items by about mid-November, 1962).

At the conclusion of the meeting, the NRC staff stated that, subject to (1) receipt of satisfactory responses to five of the action items and (2) completion of a successful confirmatory masonry wall testing program, masonry wall design review would be complete for Trojan.

Original sir #AW C. H. Tramell, Project Manager 8210150354 821005 Operating Reactors Branch #3 PDR ADOCK 05000344 Division of Licensing P

PDR Attachment cc: See next page B hbL...

Tr

,,1,l/pn RACl,arkhg...h

.0RB#3:DL....

orncr>

suaume>

.lo

..L82,...,

10/ d,82,,,,

om>

s mc rosu sta oo.co3 Nncu cao OFFICIAL. RECORD COPY ownim-muo

_ ma u u:# + % a 4 2 u m kr.r A liep hii

'L s.

g, MEETING SUMARY DISTRIBUTION Licensee: Portland General Electric Company

• Copies also sent to those people on service (cc) list for subject plant (s).

/

yt)ocket File NRC POR L PDR NSIC ORBf3 Rdg ORBf3 Summary File JHeltemes BGrimes RAClark Project Manager PMKreutzer OEj.D ELJordan JMTaylor ACRS-10 NRC Participants t

s l

. 1:s~i..u.. e :,9 s

Portland General Electric Company cc: Multnomah County Library Social Science and Science Department 801 S.W.10th Avenue Portland, Oregon 97205 Michael Malmros, Resident inspector U. S. Nuclear Regulatory Commission

-Trojan Nuclear Plant P. O. Box 0 Rainier, Oregon 97048 Robert M. Hunt, Chairman Board of County Commissioners Columbia County St. Helens, Oregon 97501 Donald W. Godard, Supervisor Siting and Regulation Oregon Departnent of Energy Labor and Industries Building l

Room 111 Salem, Oregon 97310 J

Regional Administrator Nuclear Regulatory Connission, Region V Office of Executive Director for Operations 1450 Maria Lane, Suite 210 Walnut Creek, California 94595 l

l l

e =-mdaaiqski

~:

AHackeat PGE/NRC/Bechtel Meeting September 29, 1982 and September 30, 1982 Name Affiliation i

C. M. Trammell NRC R.

C. Anderson Bechtel C. N. Pusheck*

Bechtel E. A. Goldenberg*

Bechtel I

W. H. White Bechtel P

L. W.

Erickson PGE T. Bushnell PGE K. Gross Bechtel W. Lang Bechtel r

l P. Chang-Lo Bechtel W.

S.

Orser*

PGE N. Chokshi NRC/SEB D.

C. Jeng NRC/SEB

• Part time As a result of the 9/29 and 9/30 meetings between PGE, NRC and Bechtel (attendees listed above) relating to LER 79-15 resolu-tion completion, detailed discussions and reviews resulted in the following list of items for which additional information has been requested:

Additional Information j

l.

Demonstrate in-plane response effects on out-of-plane response.

2.

Documentation (summary) of verification programs conducted for:

a)

Rebar placement b)

Mortar and grout presence c)

Boundary conditions (This will include QA tile reviews, rebar layout and cut sheet studies, collar joint mortar drilling results, inspections pursuant to LER 80-07, pertinent NCRs, Control Building modification inspections, and field observations, etc.)

3.

Examples of performance ( T 6 etc.) in response to wall in-plane demands for typical small non-STARDYNE walls.

4.

For those walls which would not meet SEB D+L+E @fs = 20 KSI, pro-vide evaluations considering (sequentially):

a.

Refined calculations b.

Global d= 4% (Step 1 h = 4%, Step 2 h= 7%)

45ksi (min.) (actual records) c.

F

=

y 50ksi (ave.)

F

=

y

l..

ac 4 - --

n_

5.

Considor confirmatory testing. NRC will provida a letter ex-plaining their position with regard to why testing is needed for confirmation of criteria parameters, safety margins and overall response capabilities of masonry walls.

6.

Expand on response to 08 of 6-24-82 to explain why it is concluded that the intent of the applicable SRP criteria is met.

Examine I

potential effects of tornado missile on service water system.

Upgrading of missile protection for this area (CCDtheat ex-changers) may be required.

3 i

4 i

i i-i i

1 l

l l

~

r