ML20237D627

From kanterella
Jump to navigation Jump to search

Informs That Attached Questions Transmitted by Fax on 980824 by M Kitlan of Duke Energy Corp to Prepare for Upcoming Conference Call.Memo & Attached Do Not Cover Formal Request for Info or Represent NRC Staff Position
ML20237D627
Person / Time
Site: Catawba Duke Energy icon.png
Issue date: 08/24/1998
From: Tam P
NRC (Affiliation Not Assigned)
To:
NRC (Affiliation Not Assigned)
References
TAC-M72401, NUDOCS 9808270087
Download: ML20237D627 (2)


Text

. _ - _ _ _ _ _ - _ _ _ _ _ _ -

,$Y "% ,- .

~

fO t UNITED STATES

$ j f

NUCLEAR REGULATORY COMMISSION n WASHINGTON, D.C. 20616 0001

'+9*****

August 24,1998 MEMORANDUM FOR: 5 Docket File' 4 FROM: Peter S. Tam, Senior Project Manager Project Directorate 11-2 Division of Reactor Projects - t/II Office of Nuclear Reactor Regulation

SUBJECT:

CATAWBA NUCLEAR STATION, UNIT 2 - FACSIMILE COMMUNICATING QUESTIONS ON STEAM GENERATOR TUBE INSPECTION (TAC M72401)

The attached questions were transmitted by fax today to Mike Kitlan of Duke Energy Corporation (DEC) to prepare him and others for an upcoming conference call. This memorandum and the attachment do not convey a formal request for information or represent an NRC staff position.

Docket Number 50-414 Djstributi20 PUBLIC r, '

H. Berkow John Tsao,0-7 D4 k\

Up p p*~ r 1 JDKdb hi aism, m.,, , g

,n

. JO

~

9808270087 980824

PDR ADOCK 05000414 G PDR l

[

L_________

l Catawba Unit 2 Steam Generator Tube inspection Results Topics for an Upcoming Conference Call Licensees' steam generator (SG) tube eddy current (EC) inspections play a vital role in the management of SG tube degradation. The results are used to demonstrate adequate structural and leakage integrity of the SG tubes.

l- . The NRC staff is interested in discussing steam generator inspection plans and results, although

, the licensee is not required to participate in this discussion. The following list of topics describes

[ areas the NRC staff typically is interested in talking about:

o Primary-to-secondary leakage prior to shutdown

.o Results of secondary side hydro o For each steam generator, general description of areas examined; include expansion criteria and specifying type of probe used in each area l

o For analyzed EC results, describe bobbin indications (those not examined with i RPC) and RPC/Plus Point /Cecco indications, include the following information:

location, number, degradation mode, disposition, and voltages / depths / lengths of l most significant indications.

o Repair / plugging plans o Previous history; "look backs" performed o New inspection findings o In-situ pressure test plans and results, if available; include tube selection criteria o Tube pull plans and preliminary results, if available; include tube selection criteria L o Assessment of tube integrity for previous operating cycle

.o Assessment of tube integrity for next operating cycle s

L o Schedule for steam generator-related activities during remainder of current outage l

1