ML20137H761

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Rev 9 to Procedure QI-QP-11.0-12, Insp of Pressure Grouted Base Plates & Equipment Bases
ML20137H761
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 06/14/1983
From: Williams H
TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:
Shared Package
ML17198A292 List: ... further results
References
FOIA-85-59 QI-QP-11.0-12, NUDOCS 8512020468
Download: ML20137H761 (4)
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TEXAS UTILITIES GENERATING CO.

BER REVISICN !

PAGE CPSES i

i lQI-QP-11.0-12 9

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I PREPARED BY:

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m INSPECTION OF PRESSURE CATE GROUTED BASE PLATES AND

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EQUIPMENT BASES APPROVED BY: #f/

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APPROVED BY:

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1.0 REFERENCES

1-A CEl-25, " Grouting Pipe Support Wall and Ceiling Plates" 1-B CEI-27, " Grouting of Equipment Base Plates with Ceilcote 658-N l

Grout" l

HISTBRICAL RLE j

l This instruction provides the QC Inspector with the criteria l

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to be used when inspecting Epoxy Pressure Grout on supports, base plates and equipment foundations with the use of Ceilcote 658-N epoxy grout.

2.2 SCOPE This instruction is to be used when inspecting the pressure grout used on ASME Section III, Subsection NF, Class 5-Supports, cable tray, conduit supports and gaps formed between the concrete and the equipment base after grouting 3

per CCP-16 (due to shrinkage). 'The use of this material is limited to gaps not to exceed 1/2 inch wide.

3.0 INSTRUCTION h

l 3.1 FORMING Epoxy grout is applied in a fluid state and adequate fonns or

" Dam" must be provided as applicable.

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INSTRUCTION ISSUE REVISION PAGE NUMBER DATE P

' TEXAS UTILITIES GENERATING CO.

s CPSES QI-QP-11.0-12 9

JUN 14 1983 2 of 4 l

3.2 EQUIPMENT / BASE PLATE PREPARATION Pressure Grout placement holes shall be located as described in Attachment 1 to CEI-25 for base plates and in accordance with the instructions provided by Engineering on an Operational Traveler for equipment bases.

Hole size shall be 1/4" or as specified by Engineering and does not require repair after grout placement.

QC shall verify that placement holes are not within 1" of a i

concrete anchor and that the void under the base plate does not exceed 1/16".

Gaps exceeding 1/2" shall be brought to the attention of the Engineer for resolution prior to grout placement.

3.3 MIXING The mixing of the epoxy resin and resin converter shall be as per the manufacturer's instructions and Reference 1-A for hanger base plates, Reference 1-B for equipment bases.

Constituents provided in field unit kits are specific quantities and are not to be deviated from.

When the I

temperature of the field unit kits exceed 90', the contents I

of the sealed containers must be cooled to about 70' F.

Below 70*

F, mixing becomes difficult.

Best handling properties are achieved at 75'F 2 5'F, but are not mandatory.

Properly mixed grout will be uniform tan in color with no dry areas.

Pot life may vary depending on temperature. At 70*F, pot life will be approximately 30 minutes.

Mixed grout will be considered unacceptable when the first signs of gelling occur.

3.4 PLACEMENT Ceilcote 658-N Grout shall not be placed unless the surface temperature of the area ~to be grouted is at or above 50*F.

One surface temperature will be taken for each area that the base plates are being grouted in.

Infrequent dips in temperature to 40*F is pennissible during placement and/or cure; however, the elapsed time the temperature is below 50*F shall be added to the cure time. The surrounding area of (the base plate to be grouted) shall be inspected to be free of moisture.

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INSTRUCTION ISSUE REVISION PAGE (3

! - TEXAS UTILITIES GENERATING CO.

A CPSES QI-QP-11.0-12 9

3 of 4 JUN 14 1983,

QC shall verify that construction has placed dial indicators on equipment base plates to monitor base movement during pressure grouting and that the readings are recorded in the operational travelers.

Where possible, pressure grouting shall proceed in all directions from the centermost opening. As soon as grout is emitted from an adjacent hole and the grout is free of bubbles, injection may begin at that opening.

This step wise procedure shall be continued until the grout is forced (bubble free) from all sides of the base plate or holes adjacent to the eage.

NOTE:

On equipment when isolated pockets are being

grouted, the above paragraph may not be applicable.

3.5 CURE OF GROUT D)

When a system has been grouted and is being placed into operation prior to the full seven days of cure, the hangers that have been grouted will be monitored for surface temperature and cure time as stated below.

Surface Temp. 'F Hours of Cure 50 - 69 72 70 - 89 18 90 - 110 16 Below 50*F little or no cure takes place, therefore, grouted areas are to be maintained above 50*F for proper cure.

Full cure of grout shall be seven days at or above 50*F.

3.6 00CUMENTATION Equipment base plate grouting shall be documented on an Inspection Report and Operation Traveler.

Hanger base plate grouting shall be documented on the IR.

3.7 SAFETY Safety precautions shall be. observed as identified in Reference 1-A or 1-B.

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e INSTRUCTION ISSUE REVISION PAGE NUMBER DATE i TEXAS UTILITIES GENERATING CO.

CPSES QI-QP-11.0-12 9

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l ATTACHMENT 1 COM AN CHE PEAM STEAM Er.ECTRic S T ATICN sner' cv INSPECTION REPORT

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trEW No PRESSURE INSPECTION ATTRIBUTES oart sicaamt E

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GROUT l

l 1.

10a= emvided alona plate edge as recuired.

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2.

l Holes drilled in DroDer location, i

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ICeilcote 658-N or accreved equal used.

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4.

l Mixed according to Manu'acturer's instr *sctions.

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ITemoerature meets Manufacturer's specifications for l

l lelacement.

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6.

lCae does not exceed h" wide.

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IOial indicators are placed to monitor eouipment base l

Irlate wevement durino Dressure grouting and readings l

laec eeceeded on Travelers, lSurrcundine area is free of moisture.

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I Greut ocur is cured when system is olaced into operation I

I Seier to full cure.

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REFERENCE:

CE!-25. Rev.

CEI-27. Rev,

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