ML102870212
| ML102870212 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 09/20/2010 |
| From: | Progress Energy Co |
| To: | Office of Information Services |
| References | |
| FOIA/PA-2010-0116 | |
| Download: ML102870212 (2) | |
Text
FM.,&2 Exhibit 2 Page 1 of 2 Progress Energy CRYSTAL RIVER UNIT 3 Page 5 of 44 Rev. 6 DESIGN BASIS DOCUMENT SYSTEM NAME: SYSTEM CODE: CONTAINMENT
-GENERAL N/A PARAMETER Flexible Conduit -Used around penetrations in wall of containment.
-Minimum 22 gauge-5 1/4" O.D.-5" I.D.Schedule 40 Conduit Used in foundation mat and containment dome.-ASTM A53-70, Type E or S Steel pipe Grade A for mat Grade B for dome SOURCE See "Conduit (General)" on Page 5 for the Source of requirements cited on this page.REASON Flexible conduit specified in order to permit economical and efficient field fabrication and fitting.Structural design material to ensure that dome conduit system is capable of supporting the dome liner under concrete placement loads. This conduit is, therefore, load carrying such that Grade B material (fy = 60 ksi) is specified.
In the base mat the schedule 40 conduit (pipe) is the transition material between the trumpet in the base mat and the rigid conduit in the cylindrical wall.This pipe is not required to carry structural load, such that Grade A material (fy = 48 ksi) is considered adequate.Steel conforming to ASTM A421 is the standard material specified throughout the industry for use as a buttonheaded tendon wire.The steel used for this project is the Japanese equivalent of that material.Exceptionally high strength is required in order to develop the required level of prestress.
Relaxation is a loss of stress when a wire is prestressed and maintained at a constant strain for an extended time. The degree to which this happens varies with the steel and is, therefore, specified by the steel supplier.
That value must be known in order to evaluate the effective prestress over the life of the plant.Tendon Wire ASTM A421-65 Type BA Tendon wire is specified in G/C, Inc. Specification SP-5583 and is listed here for reference only.fy = 240 ksi-Relaxation
= 4%See "Tendon Wire" on Page 6 for the Source of the requirement cited on this page.Tab 1/1, Revision 6 P)e FMI,.6,.2 Exhibit 2 Page 2 of 2 Progress Energy CRYSTAL RIVER UNIT 3 Page 6 of 44 Rev. 6 DESIGN BASIS DOCUMENT SYSTEM NAME: SYSTEM CODE: CONTAINMENT
-GENERAL N/A PARAMETER Tendons-163 wire Area -9.723 in 2 SOURCE G/C, Inc. Specification SP-5583 (for reference only).REASON The tendon comprised of 163 -7mm wires is approximately equivalent to the 170-0.25 in.wire tendons typically being utilized in the industry at the time of plant design.See page 19 for a summary of prestress forces in each of the three tendon groups.Utilized on the basis of recommendations from Prescon Corp., the supplier of the prestressing system.Anchorage Components Prescon Shop Drawings.Bearing plate-ASTM A533-Grade B-Class 2 Shims-Modified Armco VNT or like material PEERE # 0987 Stressing End Washer-Alloy steel forging Tendon Grease Shop application:
Visconorust 3001 A Field application:
Visconorust 2090P Visconorust 2090P-2 G/C, Inc. Specification SP-5583 (for reference only).Visconorust 3001A was the state-of-the-art tendon grease for the prevention of corrosion of prestressing wires. The 3001A material was used as a shop-applied coating. The 2090P and 2090P-2 were used to field coat the inside of the conduit as well as to serve as a bulk filler after tendon installation.
Other Visconorust formulations compatible with those noted are used during outages when tendon surveillance is carried out.Foundation Bearing Material*The basic source for all criteria relating to foundation design parameters is: Woodward-Clyde
& Assoc.,"Summary of Foundation Investigation Evaluation and Construction for Crystal River Unit 3." Tab 1/1, Revision 6/1;