ML20087N799

Affidavit of MR Tresler,Lr Wilson,Hw Karner & Jk Mccall Re Const QA

ML20087N799
Person / Time
Site:	Diablo Canyon
Issue date:	03/19/1984
From:	Karner H, Mccall J, Tresler M, Wilson L BECHTEL GROUP, INC., HOWARD P. FOLEY CO., PACIFIC GAS & ELECTRIC CO., PULLMAN POWER PRODUCTS CORP. (FORMERLY PULLMAN, INC.)
To:
Shared Package
ML16340E243	List: ML20087N773 ML20087N774 ML20087N775 ML20087N776 ML20087N777 ML20087N779 ML20087N781 ML20087N782 ML20087N785 ML20087N787 ML20087N788 ML20087N790 ML20087N791 ML20087N792 ML20087N793 ML20087N795 ML20087N796 ML20087N797 ML20087N798 ML20087N799 ML20087N800 ML20087N801 ML20087N802 ML20087N803 ML20087N804
References
NUDOCS 8404040417
Download: ML20087N799 (5)

Text

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n UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSI0tl BEFORE THE AT0f1IC SAFETY AND LICENSING APPEAL BOARD ,

)

In the flatter of )

) Docket Nos. 50-275 PACIFIC GAS #10 ELECTRIC ) 50-323 C0t1PANY )

) (Construction Quality Assurance)

(Diablo Canyon lluclear Power )

Plant, Units 1 and 2) )

)

AFFIDAVIT OF M.R. TRESLER, L.R. WILSON, H.W. KARNER, AND J.K. McCALL STATE OF CALIFORNIA )

) ss.

COUNTY OF )

SAN LUIS OBISP0 )

The above, being duly sworn, depose and say:

I,'M.R. Tresler, am Assistant to the Unit 1 Project Engineer on the Diablo Canyon Project. I am an employee of Pacific Gas and Electric Company.

I, L.R. Wilson, am Quality Assurance Director for the H.P. Foley Company on the Diablo Canyon Project.

I, H.W. Karner, am Quality Assurance / Quality Control Manager for Pullman Power Prodocts at the Diablo Canyon Power Plant.

I, J.K. McCall, am Group Supervisor, Civil Engineering, for the 1 Bechtel Power Corporation on the Diablo Canyon Project. l

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JI #110 and 111, ftotion at 32.

It is alleged that:-

According to a current QC inspector, there "are no procedures detailing the proper size, shape or placement" of shims that insure pipe support baseplates are level.

These baseplates are installed throughout the plant.

(citing 1/16/84, Anon. Aff. at 8-9.)

The uncontrolled installation of shims compromises the plant's safety by raising " serious questions about the reliability of some of the seismic calculation" according to the same inspector. Seismic calculations should be based on distances from the load bearing surface, and as installed the shims bear the weight of the pipe support.

Although there also is grout under the baseplates, the shims should be classified as the load bearing surface because they are tcrqued to the plate and the grout isn't. Grouting is required for. seismic installation.

To illustrate the significance, shims installed in this manner at other plants have had to be entirely redone.

. (citing 1/16/84, Anon. Aff. at 9. )

1. The allegation that there are "no procedures detailing the proper size, shape or placement" of shims is correct; however, it nas no significance

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since the remainder of the allegation is incorrect.

2. Pipe supports which attach to floors are designed to provide approximately one inch of grout between the -floor and the support base plate. This design assists in precluding corrosion of the base plate in areas subjected to standing water.

3. The base plate install'ation process begins with anchor bolt installation followed by roughing the concrete surface and placement of the baseplate. The baseplate is placed over the anchor bolts and shimmed to level the plate and provide grouting space. The nuts are then torqued to the value specified by installation procedures.

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4. The size, shape and location of the shims is not critical. The shims mus't be capable only of taking the load from the torquing of the bolts and create no unnecessary stresses in the baseplate. It is obvious that any size shim will be capable of taking the compressive lo.ad from bolt torquing and the practice of shim placement adjacent to the bolt, as described by the affiant, prevents unnecessary base plate stresses during torquing.

5. Following construction of the support, it is released for grouting. All supports are grouted by a controlled process under the QC program.

Nonshrink grouts are the only grouts used for support base plates.

These grouts have the characteristics of either expanding slightly during the curing process or r.ot shrinking at all.

6. Thgrefore, the plate is in complete contact with the shims and the grout. The grout provides the majority of the bearing area. For this reason, the pipe support calculations are based on the grout / base plate interface being the bearing surface.

7. The anonymous affiant's concern may stem from experience with conventional grouts or concrete which shrink during the curing process.

If plants had used conventional grouts for base plates, then shim size,

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shape and location would require additional control.

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DATED: March 18, 1984 M.R. 4resler

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L.R. Wilson H.W. Karner Subscribed and sworn to C~' , before me this 18th day of March,1984

$0 Wenay sproul () '

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Notary Public in and for the ___ ____ ,_ _ .--_----

County of San Luis Obispo, 4 OFFICIAL SEAL State of California. -j WENDY SPROUL

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My comission expires 4 June 30, 1986 l w"d8E"uY3 Elses O

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r. O DATED March 19, 1984 Y t..

'(.K.McCall \

Subscribed and sworn to before me this 19th day of March, 1984 l

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SEAL ncy J. Cemaste h -

Notary Public in and for the City and County of San Francisco State of California.

fly commission expires April 14, 1986

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}! NANCY J. LEMASTER

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g. CITr .'.N7 COUNTY oF i';

• SAf4 FRAf4CISCo h My Commission Excites Apnt 14,1986 }[-

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