ML18051B554

Steam Generator Eddy Current Insp Plan for 1985/86.

ML18051B554
Person / Time
Site:	Palisades
Issue date:	09/27/1985
From:	CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
Shared Package
ML18051B553	List: ML18051B552 ML18051B554
References
PROC-850927, NUDOCS 8510010370
Download: ML18051B554 (7)

Text

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ATTACHMENT Consumers Power Company Palisades Plant Docket 50-255 1985/86 STEAM GENERATOR EDDY CURRENT INSPECTION PLAN September 27, 1985 8510010370 8~~~55 PDR AD~K 0 - PDR"

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. 6 Pages IC0985-0293-NL04

CPCO PALISADES NUCLEAR PLANT 1.985/86 S/G ET INSPECTION PLAN Required by Required by Scope Present Tech. Specs. Proposed Tech. Specs.

A.

• Flaws > 30% in Either of Yes Yes Previo'ii"s Two Inspections B. 3% Percent Random Sample Yes Yes C. Tube/Sleeve Assemblies Yes No (Every 3rd Inspection)

D. Profilometry No No E. Supplemental Samples* Negotiable 3%, 6%,

with NRC Additional Negotiable

• Supplemental samples would utilize the examination method(s) which detected the increase in flaw size or population.

MI0885-0575A-TC01

PALISADES 1985/86 STEAM GENERATOR INSPECTION ET EXAMINATION DESCRIPTION A22roximate Number of Tubes to be Examined Appropriate Eddy Current Primary Generator "A" Generator "B" Duration Examination Test Type Purpose Information Hot Cold Hot Cold (Hours) 540 SFW Differential Flaws > 30% in either Wastage 900 100 700 100 120 Coil Multi frequency Hultiparameter of past two inspections (Randon sample - 2% HL, l'> CL)

Pitting e*

4C4F Differential Tube exams for 30-100% IGA 800 200 900 150 Hulticoil both with and without Circ. Cracking Multi frequency denting Hultiparameter (Random sample - 2% HL, 1% CL)

Dent Region* Absolute Pancake For uninterpretable Wastage (Est 50)* (Est 50)* 64 Rotational Coil (Rotational) flaws due to denting which were > 45% in the previous inspection Sleeved Tube Axial Differential Examination of tube/ Tube/Sleeve 13 0 20 0 48 (Rotational)

Tube/Sleeve (Slow Pull)

Coil (Rotational)

Differential Coil sleeve assemblies Examination of tube/

sleeve assembly Degradation Tube/Sleeve Degradation 13 0 20 0 (Included in 48 Hours) e Profilometry Eddy Current Examination of dent Dent Profiles 309 104 244 106 24 Proximity Method profiles and Deformation

• The number of flaws > 45% which require dent region rotational examination will not be known until the 540 SFW and 4C4F examinations are complete.

MI0885-0575A-TC01

PALISADES STEAM GENERATOR REPAIR CRITERIA Present Proposed Test/Condition Criteria for Repair Tech. Specs. Tech. Specs.

A. 540 SFW > 58% Degradation Yes Yes B. 4C4F > 50% Degradation No Yes

c. Cracking Upon Detection No Yes D. Multiple Indication > 29% Yes Yes E. Tube/Sleeve Assemblies Per Tech. Specs. Yes Yei:;

F.

• Blocked Tubes .540" Probe Will Yes . Yes Not Pass G. Uninterpretable and Uninterpretable and Yes Yes

> 45% Last Inspection > 45% Last Inspection MI0885-0575A-TC01

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STEAM GENERAXO.R SUPPORT LOCATIONS Palisades Steam Generators Tube Sheet a Supports 3743.10. 3. I. L 32

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EVALUATION OF 4C4 FLEX PROSE Me::hanical

1. General Overview of Design I ..______ 2.s~3"----~

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