ML20237B157
| ML20237B157 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 12/03/1987 |
| From: | DUKE POWER CO. |
| To: | |
| Shared Package | |
| ML20237B014 | List: |
| References | |
| NUDOCS 8712160062 | |
| Download: ML20237B157 (2) | |
Text
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REVISED TECHNICAL SPECIFICATION INSERTION PAGE 8712160062 071203 PDR ADOCK 05000413 P
PDR r-l
INSERTION A
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- 10) Tube Roll Expansion is that portion of a tube which has been increased in diameter by a rolling process such that no crevice exists between the outside diameter of the tube and the tubesheet.
11)
F* Distance is the minimum length of the roll expanded portion of the tube which cannot contain any defects in order to ensure the tube does not pull out of the tubecheet.
The F* distance is 1.60 inches and is measured from j
j the bottom of the roll expansion transition or the top of the tubesheet if the bottom of the roll expansion is above the top of the tubesheet.
Included in this distance is a safety factor of 3 plus a 0.5 inch eddy l
current vertical measurement uncertainty.
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- 12) Alternate tube plugging criteria does not require the tube to be removed f rom service or repaired when the tube degradation exceeds the plugging
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limit so long as the degradation is in that portion of the tube from F* to the bottom of the tubesheet.
This definition does not apply to tubes with j
degradation (i.e., indications of cracking) in the F* distance.
J INSERTION B d.
For Unit 1, the results of inspections for all tubes for which the alternate tube plugging criteria has been applied shall be reoorted to the Nuclear Regulatory Commission in accordance with 10 CFR 50.4, prior to restart of the I
unit following the inspection.
This report shall include:
)
1)
Identification of applicable tubes, and
- 2) Location and size of the degradation.
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