ML17345B251

Summary of 830816,18 & 19 Site Meetings W/Util,Bechtel & Drexel Univ Re IE Bulletin 80-11, Masonry Wall Design

ML17345B251
Person / Time
Site:	Turkey Point
Issue date:	09/01/1983
From:	Mcdonald D Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
IEB-80-11, NUDOCS 8309130131
Download: ML17345B251 (16)

Text

(>>QP Distribution Docket tIos. 50-250 and 50-251 September 1,

1983 Liclh~ee:

Facility:

Florida Power and Light Company Turkey Point Plant Units 3 and 4 Summary of Site Visit and Ileeting Held with Florida Power and Light Company August 16, 18 and 19, 1983 Regarding Masonry flhll Design.

Introduction I

By letter dated April 26,. 1983', the f/RC staff'equested a site visit.to observe and examine the masonry> walls in conjunction with the IEB 80-11 reviews and a meeting be arranged to allow for a detailed audit of the calculations and qhalysis ysed for masonry wall qualification.

The site visit was held on August 16, 1983, at Florida Power and Light Company's (FPL) Turkey Point Plant.

The attendees are identified in Enclosure 1

and the agenda provided in Enclosnre 2.

Subsequent to the site visit, meetings were held on August 18 and 19, 1983, at the Gaithersburg offices of Bechtel Power Corporation to perform a detailed audit of the calculations and analysis used to qua'lify several walls identified Boring the site visit.

The attendees are identified in Enclosure. 3, S

Summar of Site Yisit ifqqbers of',the '.HRC staff and their consultants, Franklin Research Center and l)r'exell University, met with members of FPL's staff and their representatives at the Turkey Point Plant Sitl,/

The objectives of tie site visit were to observe and examine the masonry block walls in conjunction with tEB 80-11

.review and discuss additional details of the masonry wall qualification.

The primary concerns with regard to the masonry wall construction were:

Construction deficiences identified in the Licensee Event Report dated April 19, 1983.

Ongoing repair activities to dispose of the d4ficiencies Observe field conditions such as boundries, attachments,

openings, etc.

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In addition.to the plant walk down, details were discussed relating to the masonry walls as identified in the agenda (Enclosure 2).

At the conclusion of. the plant tour and discussions, several walls were identified for detailed calculation reviews at subsequent meetings to be hbld on August 18 and 19, 1,983, at the Gaithersburg offices of Bechtel Power Corporation.

Summar of Au ust 18 and 19 meetin s

A<embers of the tIRC staff and their consultants met with the licensee and their representatives at the Gaithersburg offices of Bechtel Power Corporation.

As previously stated, the purpose of the meetings was to review detailed calculations and to discuss the reevaluation criteria including arching action theory.

The following identifies the major activities and observations of the staff:

The plant contains approximately P7 safety-related masonry walls of which approximately 47 have been qualified using the arching action theory.

The ranaining walls have been qualified using working stress design method, These wal1s are/will be fully grouted and ver tically reinforced.

The staff was informed that the walls 'qualified using the working stress design method will not exceed the staff's allowable stresses.

The tensile capacity of the masonry is not relied"upon to resist loads (as noted

'above'hese wa11s are reinforced) and the shear stresses are not the governtng I factors.

The "BLOCKllALL"program, used by the 1:icensee to evaluate the masonry. Galls, conservatively assigns the spectral peak acceleration fzlule at all frequencies which are less than the frequency at which the peak occurs in a given floor response spectra..

s The maximum in-plane strain occurs for one wall:, '.No. T-31-6, for the Safe Shutdown Earthquake (SSE) condition.

The value of this stress is 3.03 e 10 The staff will use,this, information to judge the, adequacy of the licensee's in-plane strain. criterion.

The calculations-,for three walls qual,i:fied using the arching action theory were reviewed.

The cal.culated stresses.

in these.walls were quite low and could be shown to meet the staff's acceptance criteria for unreinforced walls based on working stress deji$ n method.

'How'ever, 'the staff was ih'Formed that this may not apply in all cases.

In addition, sane of the walls;qualified by arching action theory arq in high radiation a'reas.

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accepting the walls qualified by the working stress method.

The SER will contain a staff, position on the use.of arching action theory.

The licensee and their representatives were wel.l prepared'or the site visit and meetings.cm7he staff and their consul.tants were extended excellent cooperation which provided productive results.

The staff gained valuable insight regarding the masonry w"11 construction, repair activities and design procedures used for the Turkey Point Plant masonry wall construction.

Enclosures:

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Attendees Site Visit 2.

Agenda - Site Visi.t 3.

Attendees - August 18 and 19 meeting cc w/enclosures:

See next page Daniel,.G. HcDonald, Project hIanager Operating Reactors Branch No.

1 Division of Licensing OFFICE/

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NASONRY'ALLS..:..

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Agenda'ar August I6" 1'983

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, Z:Identff cation af'on-Con farmances,

. Discovery

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'M-;E"Finding@

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.EI; Qr.iguana:T Constr:union:

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Testing Program'.

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