ML17083B468

Trip Rept of 841001-05 Site Visit W/Bnl Re Identification of Engineering Matl Needed to Conduct Audit on Adequacy of Civil/Structural Design & Analyses.List of Addl Audit Items Encl

ML17083B468
Person / Time
Site:	Diablo Canyon
Issue date:	11/01/1984
From:	Kuo P, Polk H Office of Nuclear Reactor Regulation
To:	Knight J Office of Nuclear Reactor Regulation
Shared Package
ML16341A455	List: ML16341A454 ML16341A456 ML17083B468 ML17083B471
References
TAC-60090, NUDOCS 8411150140
Download: ML17083B468 (6)

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UNITED STATES NMLEA'R REGULATORY COMMISSIO WASHINGTON, D. C. 20555 NOV 01584 MEMORANDUM FOR:

James P. Knight, Assistant Director for Components and Structures Engineering Division of Engineering THRU:

George Lear, Chief K'U

<(Pf'tructural, and Geotechnical Engineering ranch Division of Engineering FROM:

SUBJECT:

P. T. Kuo, Leader.

Structural Engineering Section B..

Structural and Geotechnical Engineering Branch Division,. of Engineering Harold Polk, Structural Engineer Structural Engineering Section B

Structural and Geotechnical Engineering Branch Di'vision of Engineering TRIP REPORT FOR MEETING - OCTOBER 1-,5,

1984, WITH PG&E ON DIABLO. CANYON UNIT 2. AUDIT From October 1 thru 5, 1984, P-. T. Kuo; Harold Polk, and N. Chokshi of the SGEB staff and consultants C. Miller, C. Constantino and A.

Philippacopoulos of Brookhaven National Laboratory (BNL) met with the PG&E Diablo Canyon Project staff on the evaluation. of Diablo Canyon Unit 2 design.

The purpose of the trip'was to identify the engineering material needed to conduct

a. staff. audit on the adequacy of civil/structural design and analyses.

Items that were identified as being necessary to begin the audit process are contained in Enclosure 1.

After this material has been evaluated additional material may be required.

The staff and its consultants toured the Diablo Canyon Unit 2 facility on October 4 to become more familiar with the physical layout and construction of the unit.

The staff also reviewed the calculations for several safety related masonry block walls and inspected walls during the plant visit.

quality assurance/quality control measures were discussed with PG&E,.

A copy of the staff's position-with respect to the energy balance technique to qualify the walls was provided to PG&E during the discussions.

PG&E provided:= considerable information and several construction personnel who were present during the wall construction.

The staf projects additional audits to be conducted in the very near future.

cc:

See next page.

~ P

Knight

<<2 Additional meetings with PGSE are anticipated to be held within the next few weeks to clarify any questions the staff may have regarding the material provided.

' (

P.:T; duo, Leader Structural Engineering'ection B

Structural and Geotechnical Engineering Branch Division of Engineering cc:

R. Vollmer

'~H~SChi'erlking.-i.

P.

Kuo H. Polk N. Chokshi C. Miller C. Constantino

~'A. Philippacopoulos arold Polk, Structural Engineer Structural. Engineering Section 8

.Structural and Geotechnical Engineering Branch Division of Engineering,

ID Diablo Canyon Unit 2 NRC/BNL Civil Structural Evaluation Additional Audit Items A.

Turbine Building:

1.

The following drawings are requested for the development of a 2D Model for a typical frame

- a.

443117 plan of elevation-140'south b.

- 443118 plans of elevations

123, 125 and 128 443121 plan of elevation 119 south d.. 443123 plan of elevations 104 and 107 south

2. "The stiffness matrix reflecting the roof truss.

This is contained in calculations 64-T-275.

3.

Calculations'65-T-311 for elevation of the stresses in the buttresses.

These calcs had not. been completed during the October 1-4, 1984 audit.

B.

Containment Annulus Structure:

C.

D.-

1.

Member evaluations for one tangetial

beam, one radial

beam, one column.

Provide calcs for. stress evaluation for critical load combination.

In selecting the members include. those with torsion effects and specifically the members which were strengthened by T-section addition.

2.

Horizontal seismic analysis of floor at elevation 106, including all modes of the interior concrete and annulus frame up to 33 Hz used in the studies to investigate the effect of frequencies between 20 Hz'and 33 Hz.

Provide the-following:

a.

model b.

computer printout. of input and output data Buried Electrical Conduits

(

1.

Sample of design drawings. including routing plan, and sample analyses.

Electrical Raceway Supports 1.

Sample of typical calculations showing load combinations and member stress evaluations..

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